fix(video): alternate read for double buffering

feat: double buffered video input
docs: README update
2025-11-24 19:11:59 +01:00 · 2025-11-24 18:52:44 +01:00 · 2025-11-24 00:28:59 +01:00 · 2025-11-24 00:28:30 +01:00 · 2025-11-23 19:11:08 +01:00 · 2025-11-23 19:10:57 +01:00
47 changed files with 1445 additions and 805 deletions
@@ -16,7 +16,18 @@ jobs:
      - name: install libs
        run: sudo apt install -y libglfw3-dev libgl-dev libv4l-dev libasound2-dev libbsd-dev
      - name: gcc
-        run: mkdir -p build && gcc -v -Wall -Wextra -Werror -Wno-format-truncation src/*.c src/*.h -lglfw -lGL -lm -lasound -lbsd -Iinclude hashmap.c/hashmap.c log.c/src/log.c -DGLFW_INCLUDE_NONE -DGLFW_EXPOSE_NATIVE_EGL -DGLFW_NATIVE_INCLUDE_NONE
+        run: mkdir -p build && gcc -v -Wall -Wextra -Werror -Wno-format-truncation src/*.c src/*.h -lglfw -lGL -lm -lasound -lbsd -Iinclude hashmap.c/hashmap.c log.c/src/log.c -DGLFW_INCLUDE_NONE -DGLFW_EXPOSE_NATIVE_EGL -DGLFW_NATIVE_INCLUDE_NONE -DVIDEO_IN
+
+  build-no-video:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: 'true'
+      - name: install libs
+        run: sudo apt install -y libglfw3-dev libgl-dev libasound2-dev libbsd-dev
+      - name: gcc
+        run: mkdir -p build && gcc -v -Werror src/*.c src/*.h -lglfw -lGL -lm -lasound -lbsd -Iinclude hashmap.c/hashmap.c log.c/src/log.c -DGLFW_INCLUDE_NONE -DGLFW_EXPOSE_NATIVE_EGL -DGLFW_NATIVE_INCLUDE_NONE

  build-release:
    needs: lint
@@ -24,6 +24,6 @@ pkg
 forge-*
 confdeps.*
 conftest.*
-forge_saved_state.txt
+*.txt
 error.glsl
 draft/
@@ -0,0 +1,15 @@
+# Path to sources
+sonar.sources=src
+#sonar.exclusions=
+#sonar.inclusions=
+
+# Path to tests
+#sonar.tests=
+#sonar.test.exclusions=
+#sonar.test.inclusions=
+
+# Source encoding
+sonar.sourceEncoding=UTF-8
+
+# Exclusions for copy-paste detection
+#sonar.cpd.exclusions=
@@ -117,9 +117,24 @@ make -f Makefile.dev release-arch
  - [x] Printable PDF of default scr/fx
  - [x] Add NanoKontrol setup file
  - [x] Find and fix opengl errors 0500 ?
- [ ] Bonus
+- [ ] Extra features
+  - [x] `--auto-random-cycle=4`
+  - [x] Arrows (up-down: bpm / left-right: cycle)
+  - [x] Save states (numkey: load / shift + numkey: save)
+  - [x] (clean) static functions at top of files
+  - [x] Configurable key codes
+  - [x] Monitor improvements
+  - [ ] Ignore some values in auto random
+  - [x] build without video in
+  - [ ] Auto discover video devices
+  - [ ] Update README monitor/keymap
+  - [ ] Auto reconnect midi input
+  - [ ] Auto reconnect video device
+  - [ ] Key codes as inputs
+  - [ ] Mouse position and scroll as inputs
+  - [ ] Joystick as input
  - [ ] Record show as text files
  - [ ] Play from record text file
+- [ ] Fixes
  - [ ] Try to write NanoKontrol config
-  - [ ] Investigate video device fps loss (bad unregister ?)
-    -  explore libv4l directly [github](https://github.com/philips/libv4l) (with `-lv4l2`)
+  - [x] Investigate video device fps loss (bad unregister ?)
@@ -1,10 +1,10 @@
 AUTOMAKE_OPTIONS = foreign subdir-objects -Wall
 bin_PROGRAMS = forge
 forge_SOURCES = src/args.c src/arr.c src/config_file.c src/file.c src/forge.c src/main.c src/midi.c src/project.c src/rand.c src/shaders.c src/shared.c src/state.c src/string.c src/tempo.c src/timer.c src/video.c src/window.c $(top_srcdir)/include/glad/gl.h $(top_srcdir)/include/glad/egl.h $(top_srcdir)/hashmap.c/hashmap.c $(top_srcdir)/log.c/src/log.c
-forge_CFLAGS = -Ofast -march=native -flto -funroll-loops -fprefetch-loop-arrays -fno-exceptions -fopenmp -I$(top_srcdir)/include -DGLFW_INCLUDE_NONE -DGLFW_EXPOSE_NATIVE_EGL -DGLFW_NATIVE_INCLUDE_NONE -DLOG_USE_COLOR -DDATADIR=\"$(datadir)/$(PACKAGE)\"
+forge_CFLAGS = -Ofast -march=native -flto -funroll-loops -fprefetch-loop-arrays -fno-exceptions -fopenmp -I$(top_srcdir)/include -DGLFW_INCLUDE_NONE -DGLFW_EXPOSE_NATIVE_EGL -DGLFW_NATIVE_INCLUDE_NONE -DLOG_USE_COLOR -DVIDEO_IN -DDATADIR=\"$(datadir)/$(PACKAGE)\"
 forge_LDADD = -lm -lGL -lglfw -lasound -lbsd
 include_HEADERS = src/args.h src/arr.h src/config.h src/config_file.h src/constants.h src/file.h src/forge.h src/main.h src/midi.h src/project.h src/rand.h src/shaders.h src/shared.h src/state.h src/string.h src/tempo.h src/timer.h src/types.h src/video.h src/window.h $(top_srcdir)/include/glad/gl.h $(top_srcdir)/include/glad/egl.h $(top_srcdir)/include/linmath.h $(top_srcdir)/include/hashmap.h $(top_srcdir)/include/log.h

-EXTRA_DIST = default/forge_project.cfg default/frag1.glsl default/frag10.glsl default/frag2.glsl default/frag3.glsl default/frag4.glsl default/frag5.glsl default/frag6.glsl default/frag7.glsl default/frag8.glsl default/frag9.glsl default/inc_cp437.glsl default/inc_debug.glsl default/inc_functions.glsl default/inc_fx.glsl default/inc_magic.glsl default/inc_rand.glsl default/inc_res.glsl default/inc_sentences.glsl default/inc_src.glsl default/inc_template.glsl default/inc_time.glsl default/inc_yuv.glsl
+EXTRA_DIST = default/forge_project.cfg default/frag1.glsl default/frag10.glsl default/frag2.glsl default/frag3.glsl default/frag4.glsl default/frag5.glsl default/frag6.glsl default/frag7.glsl default/frag8.glsl default/frag9.glsl default/inc_cp437.glsl default/inc_debug.glsl default/inc_functions.glsl default/inc_fx.glsl default/inc_magic.glsl default/inc_rand.glsl default/inc_res.glsl default/inc_sentences.glsl default/inc_src.glsl default/inc_template.glsl default/inc_time.glsl default/inc_yuyv.glsl
 confdir = $(prefix)/share/$(PACKAGE)
-conf_DATA = default/forge_project.cfg default/frag1.glsl default/frag10.glsl default/frag2.glsl default/frag3.glsl default/frag4.glsl default/frag5.glsl default/frag6.glsl default/frag7.glsl default/frag8.glsl default/frag9.glsl default/inc_cp437.glsl default/inc_debug.glsl default/inc_functions.glsl default/inc_fx.glsl default/inc_magic.glsl default/inc_rand.glsl default/inc_res.glsl default/inc_sentences.glsl default/inc_src.glsl default/inc_template.glsl default/inc_time.glsl default/inc_yuv.glsl
+conf_DATA = default/forge_project.cfg default/frag1.glsl default/frag10.glsl default/frag2.glsl default/frag3.glsl default/frag4.glsl default/frag5.glsl default/frag6.glsl default/frag7.glsl default/frag8.glsl default/frag9.glsl default/inc_cp437.glsl default/inc_debug.glsl default/inc_functions.glsl default/inc_fx.glsl default/inc_magic.glsl default/inc_rand.glsl default/inc_res.glsl default/inc_sentences.glsl default/inc_src.glsl default/inc_template.glsl default/inc_time.glsl default/inc_yuyv.glsl
@@ -21,6 +21,7 @@ build:
 		-DGLFW_EXPOSE_NATIVE_EGL \
 		-DGLFW_NATIVE_INCLUDE_NONE \
 		-DLOG_USE_COLOR \
+		-DVIDEO_IN \
 		-o build/$(TARGET) \
 		-g -Og

@@ -54,6 +55,7 @@ clean-release:
 		configure~ \
 		depcomp \
 		**/.deps \
+		**/**/.deps \
 		$(TARGET) \
 		$(TARGET)-*.tar.gz \
 		$(TARGET)-*.pkg.tar.zst \
@@ -1,12 +1,12 @@
 pkgname=forge-steel
-pkgver=1.0.0
+pkgver=1.0.1
 pkgrel=1
 pkgdesc="Fusion Of Real Time Generative Effects"
 arch=('i686' 'pentium4' 'x86_64' 'arm' 'armv7h' 'armv6h' 'aarch64' 'riscv64')
 depends=('glfw>=1:3', 'v4l-utils>=1.32', 'alsa-lib>=1.2', 'libglvnd>=1.7')
 url="https://github.com/klemek/forge-steel"
 source=("${pkgname}-steel-${pkgver}.tar.gz::https://github.com/klemek/forge-steel/releases/download/v${pkgver}/${pkgname}-${pkgver}.tar.gz")
-sha256sums=('da61207bc8af1b71544f5e35e99e7ea8dbbb72b77c0c7dc21f05ba694c28cdfa')
+sha256sums=('b2345c1a87f6b5b13dcce6a237a3f9a9ddb7fa9c3e982f5e164e7d7fef5725f3')
 srcdir=build
 backup=("usr/share/${pkgname}")

@@ -1,5 +1,4 @@
-[![CI](https://github.com/klemek/forge-steel/actions/workflows/ci.yml/badge.svg)](https://github.com/klemek/forge-steel/actions/workflows/ci.yml)
-[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=klemek_forge-steel&metric=alert_status&token=b68ccdc07773027cc51403bc5712d9364d64febf)](https://sonarcloud.io/summary/new_code?id=klemek_forge-steel)
+[![GitHub Release](https://img.shields.io/github/v/release/klemek/forge-steel?style=flat-square)](https://github.com/klemek/forge-steel/releases) [![GitHub Release Date](https://img.shields.io/github/release-date/klemek/forge-steel?style=flat-square)](https://github.com/klemek/forge-steel/releases) [![GitHub last commit](https://img.shields.io/github/last-commit/klemek/forge?style=flat-square)](https://github.com/klemek/forge-steel/commits/master/) [![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/klemek/forge-steel/ci.yml?style=flat-square)](https://github.com/klemek/forge-steel/actions/workflows/ci.yml) [![Sonar Quality Gate](https://img.shields.io/sonar/quality_gate/klemek_forge-steel?server=https%3A%2F%2Fsonarcloud.io&style=flat-square)](https://sonarcloud.io/summary/new_code?id=klemek_forge-steel) ![LOC](https://img.shields.io/badge/LOC-3.8k-blue?style=flat-square)

 <!-- omit from toc -->
 # F.O.R.G.E. (Steel)
@@ -83,13 +82,14 @@ Here are some pointers if you want to customize your FORGE experience:
  - [My nanoKontrol2 is acting strange](#my-nanokontrol2-is-acting-strange)
  - [How do I report a bug?](#how-do-i-report-a-bug)
  - [Help I got low FPS on my video device](#help-i-got-low-fps-on-my-video-device)
+  - [My video feed got strange lines](#my-video-feed-got-strange-lines)
  - [How do I change the default project built-in sentences?](#how-do-i-change-the-default-project-built-in-sentences)

 ## What is FORGE ?

 ![FORGE concept schema](./docs/forge.drawio.png)

-FORGE is an engine rendering a project into visuals.
+FORGE is an graphical engine rendering a project into visuals.

 Using OpenGL GLSL language, it talks to your graphic card to generate layers of textures defined by the fragment shaders and outputs it to your screen.

@@ -158,43 +158,51 @@ make install

 When running, the following hotkeys are available:

-* <kbd>Esc</kbd>: Exit window
-* <kbd>R</kbd>: Randomize internal values
-* <kbd>0</kbd>: Reset internal values to 0
-* <kbd>D</kbd>: Demo mode On/Off
-* <kbd>A</kbd>: Auto Random mode On/Off
+| Hotkey | Function |
+| ------ | -------- |
+| <kbd>Esc</kbd> | Exit FORGE | 
+| <kbd>R</kbd> | Randomize internal values |
+| <kbd>Shift</kbd> + <kbd>R</kbd> | Reset internal values to 0 |
+| <kbd>D</kbd> | Demo mode On/Off | 
+| <kbd>A</kbd> | Auto Random mode On/Off |
+| <kbd>&larr;</kbd> / <kbd>&rarr;</kbd> | Auto Random Cycle -/+ 1 |
+| <kbd>&uarr;</kbd> / <kbd>&darr;</kbd> | BPM +/- 1 |
+| <kbd>0</kbd>-<kbd>9</kbd> | Load state 0 to 9 |
+| <kbd>Shift</kbd> + <kbd>0</kbd>-<kbd>9</kbd> | Save state 0 to 9 |
+
+These are configurable in the [`forge_project.cfg`](#forge_projectcfg).

 ### CLI arguments

 ```txt
-usage: forge [-h] [-v] [-p=PROJECT_PATH] [-c=CFG_FILE] [-hr] [-s=SCREEN] [-m=SCREEN] [-mo] [-w] [-t=TEMPO] [-d] [-ar / -nar] [-v=FILE] [-vs=SIZE] [-is=SIZE] [-sf=STATE_PATH] [-ls / -nls] [-ss / -nss] [-tm] [-tf] 
+usage: forge [-h] [-v] [-p=PROJECT_PATH] [-c=CFG_FILE] [-hr] [-s=SCREEN] [-m=SCREEN] [-mo] [-w] [-t=TEMPO] [-d] [-ar / -nar] [-arc=CYCLES] [-vi=FILE] [-vs=SIZE] [-is=SIZE] [-ls / -nls] [-ss / -nss] [-tm] [-tf] 

 Fusion Of Real-time Generative Effects.

 options:
-  -h, --help                show this help message and exit
-  -v, --version             print version
-  -p, --project             forge project directory (default: /usr/share/forge/default)
-  -c, --config              config file name (default: forge_project.cfg)
-  -hr, --hot-reload         hot reload of shaders scripts
-  -s, --screen              output screen number (default: primary)
-  -m, --monitor             monitor screen number (default: none)
-  -mo, --monitor-only       no output screen
-  -w, --windowed            not fullscreen
-  -t, --tempo               base tempo (default: 60)
-  -d, --demo                demonstration mode (assume --no-save-state, --no-load-state, --auto-random)
-  -ar, --auto-random        randomize state every 4 beats
-  -nar, --no-auto-random    do not randomize state (default)
-  -v, --video-in            path to video capture device (multiple allowed)
-  -vs, --video-size         video capture desired height (default: internal texture height)
-  -is, --internal-size      internal texture height (default: 720)
-  -sf, --state-file         saved state file (default: forge_saved_state.txt)
-  -ls, --load-state         load saved state (default)
-  -nls, --no-load-state     do not load saved state
-  -ss, --save-state         save state (default)
-  -nss, --no-save-state     do not save state
-  -tm, --trace-midi         print midi code and values
-  -tf, --trace-fps          print fps status of subsystems
+  -h, --help                  show this help message and exit
+  -v, --version               print version
+  -p, --project               forge project directory (default: /usr/share/forge/default)
+  -c, --config                config file name (default: forge_project.cfg)
+  -hr, --hot-reload           hot reload of shaders scripts
+  -s, --screen                output screen number (default: primary)
+  -m, --monitor               monitor screen number (default: none)
+  -mo, --monitor-only         no output screen
+  -w, --windowed              not fullscreen
+  -t, --tempo                 base tempo (default: 60)
+  -d, --demo                  demonstration mode (assume --no-save-state, --no-load-state, --auto-random)
+  -ar, --auto-random          randomize state every cycle (4 beats)
+  -nar, --no-auto-random      do not randomize state (default)
+  -arc, --auto-random-cycle   auto random cycle length (default: 4)
+  -vi, --video-in             path to video capture device (multiple allowed)
+  -vs, --video-size           video capture desired height (default: internal texture height)
+  -is, --internal-size        internal texture height (default: 720)
+  -ls, --load-state           load saved state (default)
+  -nls, --no-load-state       do not load saved state
+  -ss, --save-state           save state (default)
+  -nss, --no-save-state       do not save state
+  -tm, --trace-midi           print midi code and values
+  -tf, --trace-fps            print fps status of subsystems
 ```

 ## Default Project
@@ -233,7 +241,7 @@ Working with pages and items, you can use the following predefined sources and e
 | **1** | **0** | Feedback + Thru   | _Hue_             | _Saturation_    | _Light_            | Thru             | _Hue_           | _Saturation_  | _Light_        |
 |       | **1** | Lines             | _Thick. / Dezoom_ | _Rotation_      | _Distortion_       | Feedback + Shift | _Zoom / Dezoom_ | _X Shift_     | _Y Shift_      |
 |       | **2** | Dots              | _Zoom_            | _Rotation_      | _Lens_             | Shift            | _Zoom / Dezoom_ | _X Shift_     | _Y Shift_      |
-|       | **3** | Waves             | _Spacing_         | _Thickness_     | _Vert. Scroll (R)_ | Colorize         | _Black Color_   | _White Color_ | _Shift_        |
+|       | **3** | Circuit             | _Zoom_         | _H. connect_     | _V. connect_ | Colorize         | _Black Color_   | _White Color_ | _Shift_        |
 |       | **4** | Noise             | _Zoom_            | _Voronoi dist._ | _Details_          | Quantize         | _Pixel Size_    | _Bit Depth_   | _Blur_         |
 | **2** | **5** | Video In 1 + Thru | _Hue_             | _Saturation_    | _Light_            | Dithering        | _Pixel Size_    | _Bit Depth_   | _Blur_         |
 |       | **6** | CP437             | _Zoom_            | _Charset_       | _Char. Delta_      | TV               | _Lens_          | _Horz. Noise_ | _Dezoom_       |
@@ -467,7 +475,15 @@ Don't forget to add all information available to your bug (version, operating sy

 ### Help I got low FPS on my video device

-There's already an [open issue](https://github.com/klemek/forge-steel/issues/1) on this subject.
+Unfortunately, V4L2 is very slow compared to driver-specific decoding.
+
+You can check your device real FPS on [V4L2 UCP](https://github.com/HedgeHawk/v4l2ucp) or [GTK UVC Viewer](https://github.com/jaswdr/guvcview).
+
+### My video feed got strange lines
+
+You need to decode the [V4L2 YUYV format](https://www.kernel.org/doc/html/v4.8/media/uapi/v4l/pixfmt-yuyv.html).
+
+The code is available in the default project [default/inc_yuyv.glsl](./default/inc_yuyv.glsl)

 ### How do I change the default project built-in sentences?

@@ -1,4 +1,5 @@
 -Iinclude
 -DGLFW_INCLUDE_NONE
 -DGLFW_EXPOSE_NATIVE_EGL
-DGLFW_NATIVE_INCLUDE_NONE
+-DGLFW_NATIVE_INCLUDE_NONE
+-DVIDEO_IN
@@ -1,4 +1,4 @@
-AC_INIT([forge], [steel-1.0.0], [klemek.dev@proton.me])
+AC_INIT([forge], [steel-1.0.1], [klemek.dev@proton.me])
 AM_INIT_AUTOMAKE
 AC_PROG_CC

@@ -37,6 +37,8 @@ UNIFORM_IN_FPS_PREFIX=iInputFPS
 UNIFORM_DEMO=iDemo
 # 0/1 if auto random
 UNIFORM_AUTORAND=iAutoRand
+# auto random cycle length
+UNIFORM_AUTORANDCYCLE=iAutoRandCycle
 # Current page
 UNIFORM_PAGE=iPage
 # Current selected shader
@@ -49,6 +51,8 @@ UNIFORM_STATE_PREFIX=iState
 UNIFORM_ACTIVE_PREFIX=iActive
 # Input X format raw integer value
 UNIFORM_IN_FORMAT_PREFIX=iInputFormat
+# Input X should use swap texture or not (0/1)
+UNIFORM_IN_SWAP_PREFIX=iInputSwap

 # --- uniform vec2 ---

@@ -91,7 +95,7 @@ SUB_2_PREFIX=fx_


 # Total number of internal textures
-TEX_COUNT=10
+TEX_COUNT=12

 # === VIDEO DEVICES
 # Video devices will be read from CLI arguments
@@ -102,10 +106,12 @@ IN_COUNT=2
 # To which texture will be bound video device X
 IN_1_OUT=1
 IN_2_OUT=2
+# To which texture will be bound swap buffers (for double-buffering)
+IN_1_SWAP_OUT=3
+IN_2_SWAP_OUT=4

 # === FRAGMENT SHADERS
 # Fragment shaders will be read from the CLI directory as "fragX.glsl"
-# Special shader "frag0.glsl" will be prepend to each one

 # Prefix of fragment shaders to detect
 FRAG_FILE_PREFIX=frag
@@ -114,13 +120,13 @@ FRAG_FILE_PREFIX=frag
 FRAG_COUNT=10

 # To which texture will the shader fragX.glsl will render to
-FRAG_1_OUT=3
-FRAG_2_OUT=4
-FRAG_3_OUT=5
-FRAG_4_OUT=6
-FRAG_5_OUT=7
-FRAG_6_OUT=8
-FRAG_7_OUT=9
+FRAG_1_OUT=5
+FRAG_2_OUT=6
+FRAG_3_OUT=7
+FRAG_4_OUT=8
+FRAG_5_OUT=9
+FRAG_6_OUT=10
+FRAG_7_OUT=11
 FRAG_8_OUT=0
 # Which fragment shader renders to output window
 FRAG_OUTPUT=9
@@ -262,3 +268,66 @@ MIDI_3_1_Z=
 MIDI_3_2_X=0
 MIDI_3_2_Y=16
 MIDI_3_2_Z=
+
+# =====
+# OTHER
+# =====
+
+# === SAVE FILES
+# When loading/saving from last run or using save states
+SAVE_FILE_PREFIX=forge_default_save
+
+# === HOTKEYS
+# You can change the default keycodes used on runtime
+# Modifiers are encoded like this:
+# 1000 -> shift
+# 10000 -> control
+# 100000 -> alt
+# This means 110082 is control+alt+R
+
+# R on (qwerty)
+HOTKEY_RANDOMIZE=82
+# SHIFT+R (qwerty)
+HOTKEY_RESET=1082
+# D (qwerty)
+HOTKEY_DEMO=68
+# A (qwerty)
+HOTKEY_AUTORAND=65
+# Left arrow
+HOTKEY_AUTORAND_DOWN=263
+# Right arrow
+HOTKEY_AUTORAND_UP=262
+# Down arrow
+HOTKEY_TEMPO_DOWN=264
+# Up arrow
+HOTKEY_TEMPO_UP=265
+
+# Number of load states keys
+HOTKEY_LOAD_COUNT=10
+
+# 1 to 9 then 0 keys
+HOTKEY_LOAD_1=49
+HOTKEY_LOAD_2=50
+HOTKEY_LOAD_3=51
+HOTKEY_LOAD_4=52
+HOTKEY_LOAD_5=53
+HOTKEY_LOAD_6=54
+HOTKEY_LOAD_7=55
+HOTKEY_LOAD_8=56
+HOTKEY_LOAD_9=57
+HOTKEY_LOAD_10=48
+
+# Number of save states keys
+HOTKEY_SAVE_COUNT=10
+
+# 1 to 9 then 0 keys with shift
+HOTKEY_SAVE_1=1049
+HOTKEY_SAVE_2=1050
+HOTKEY_SAVE_3=1051
+HOTKEY_SAVE_4=1052
+HOTKEY_SAVE_5=1053
+HOTKEY_SAVE_6=1054
+HOTKEY_SAVE_7=1055
+HOTKEY_SAVE_8=1056
+HOTKEY_SAVE_9=1057
+HOTKEY_SAVE_10=1048
@@ -2,22 +2,28 @@

 // VIDEO 1
 // -----------
-// IN: 1 (RAW IN A)
-// OUT: 3 (IN A)
+// IN: 1+3 (RAW IN A)
+// OUT: 5 (IN A)

 in vec2 vUV;
 out vec4 fragColor;

-#include inc_yuv.glsl
+#include inc_yuyv.glsl

 uniform sampler2D iTex0;
 uniform sampler2D iTex1;
+uniform sampler2D iTex3;
 uniform int iInputFormat1;
+uniform int iInputSwap1;
 uniform vec2 iInputResolution1;

 void main() {
    if (iInputFormat1 == YUYV_FOURCC) {
-        fragColor = yuyvTex(iTex1, vUV, int(iInputResolution1.x));
+        if (iInputSwap1 > 0) {
+            fragColor = yuyvTex(iTex3, vUV, int(iInputResolution1.x));
+        } else {
+            fragColor = yuyvTex(iTex1, vUV, int(iInputResolution1.x));
+        }
    } else {
        fragColor = texture(iTex0, vUV);
    }
@@ -9,15 +9,14 @@ out vec4 fragColor;
 #include inc_debug.glsl

 uniform sampler2D iTex0;
-uniform sampler2D iTex1;
-uniform sampler2D iTex2;
-uniform sampler2D iTex3;
-uniform sampler2D iTex4;
 uniform sampler2D iTex5;
 uniform sampler2D iTex6;
 uniform sampler2D iTex7;
 uniform sampler2D iTex8;
 uniform sampler2D iTex9;
+uniform sampler2D iTex10;
+uniform sampler2D iTex11;
+uniform int iFPS;
 uniform int iInputFPS1;
 uniform int iInputFPS2;

@@ -26,7 +25,7 @@ float s(vec2 uv, float x0, float y0) {
 step(-y0 - 1, -uv.y);
 }

-const int texts[10][5] = {
+const int texts[12][5] = {
    {0x49, 0x4E, 0x20, 0x41, 0x00}, // IN A
    {0x49, 0x4E, 0x20, 0x42, 0x00}, // IN B
    {0x53, 0x52, 0x43, 0x20, 0x41}, // SRC A
@@ -37,6 +36,8 @@ const int texts[10][5] = {
    {0x4D, 0x46, 0x58, 0x00, 0x00}, // MFX
    {0x46, 0x50, 0x53, 0x00, 0x00}, // FPS
    {0x4F, 0x46, 0x46, 0x00, 0x00}, // OFF
+    {0x44, 0x45, 0x4D, 0x4F, 0x00}, // DEMO
+    {0x4C, 0x49, 0x56, 0x45, 0x00}, // LIVE
 };

 void main() {
@@ -49,56 +50,89 @@ void main() {

    vec4 c = vec4(0);
    
-    c += s(uv2,1,2) * texture(iTex5, uv2);
-    c += s(uv2,2,2) * texture(iTex7, uv2);
+    c += s(uv2,1,2) * texture(iTex7, uv2);
+    c += s(uv2,2,2) * texture(iTex9, uv2);

-    c += s(uv2,1,1) * texture(iTex6, uv2);
-    c += s(uv2,2,1) * texture(iTex8, uv2);
+    c += s(uv2,1,0) * texture(iTex8, uv2);
+    c += s(uv2,2,0) * texture(iTex10, uv2);

-    c += s(uv2,0,0) * debug(mod(uv2, 1));
-    c += s(uv2,1,0) * texture(iTex9, uv2);
-    c += s(uv2,2,0) * texture(iTex0, uv2);
+    c += s(uv2,0,1) * debug(mod(uv2, 1));
+    c += s(uv2,1,1) * texture(iTex11, uv2);
+    c += s(uv2,2,1) * texture(iTex0, uv2);
+
+    float sel = 0;
+
+    sel += iSelected == 3 ? h_rect(uv2, vec2(1.5, 2.5), vec2(0.5), 0.01) : 0;
+    sel += iSelected == 4 ? h_rect(uv2, vec2(1.5, 0.5), vec2(0.5), 0.01) : 0;
+    sel += iSelected == 5 ? h_rect(uv2, vec2(2.5, 2.5), vec2(0.5), 0.01) : 0;
+    sel += iSelected == 6 ? h_rect(uv2, vec2(2.5, 0.5), vec2(0.5), 0.01) : 0;
+    sel += iSelected == 8 ? h_rect(uv2, vec2(2.5, 1.5), vec2(0.5), 0.01) : 0;
+
+    c = mix(c, 1 - c, sel);

    float f = 0;
    float t = 0;

-    f += rect(uv3, vec2(-51, 28.5), vec2(2.1, 0.7));
-    t += write_5(uv3, vec2(-53,28), texts[0]);
+    f += rect(uv3, vec2(-35, 28.5), vec2(2.1, 0.7));
+    t += write_5(uv3, vec2(-37,28), texts[0]);
    
    if (iInputResolution1.x > 0) {
-        c += s(uv2,0,2) * texture(iTex3, uv2);
-        f += rect(uv3, vec2(-50.4, 26.5), vec2(2.8, 0.7));
-        t += write_int(uv3, vec2(-53,26), iInputFPS1, 2);
-        t += write_5(uv3, vec2(-50.5,26), texts[8]);
+        c += s(uv2,0,2) * texture(iTex5, uv2);
+        f += rect(uv3, vec2(-35, 26.75), vec2(2.8, 0.7));
+        t += write_int(uv3, vec2(-37.6,26.1), iInputFPS1, 2);
+        t += write_5(uv3, vec2(-35.1,26.1), texts[8]);
    } else {
-        f += rect(uv3, vec2(-51.5, 26.5), vec2(1.6, 0.7));
-        t += write_5(uv3, vec2(-53,26), texts[9]);
+        f += rect(uv3, vec2(-35, 26.75), vec2(1.6, 0.7));
+        t += write_5(uv3, vec2(-36.5,26.1), texts[9]);
    }
   
-    f += rect(uv3, vec2(-51, 8.5), vec2(2.1, 0.7));
-    t += write_5(uv3, vec2(-53,8), texts[1]);
+    f += rect(uv3, vec2(-35, -11.5), vec2(2.1, 0.7));
+    t += write_5(uv3, vec2(-37,-12), texts[1]);

    if (iInputResolution2.x > 0) {
-        c += s(uv2,0,1) * texture(iTex4, uv2);
-        f += rect(uv3, vec2(-50.4, 6.5), vec2(2.8, 0.7));
-        t += write_int(uv3, vec2(-53,6), iInputFPS2, 2);
-        t += write_5(uv3, vec2(-50.5,6), texts[8]);
+        c += s(uv2,0,0) * texture(iTex6, uv2);
+        f += rect(uv3, vec2(-35, -13.25), vec2(2.8, 0.7));
+        t += write_int(uv3, vec2(-37.6,-13.9), iInputFPS2, 2);
+        t += write_5(uv3, vec2(-35.1,-13.9), texts[8]);
    } else {
-        f += rect(uv3, vec2(-51.5, 6.5), vec2(1.6, 0.7));
-        t += write_5(uv3, vec2(-53,6), texts[9]);
+        f += rect(uv3, vec2(-35, -13.25), vec2(1.6, 0.7));
+        t += write_5(uv3, vec2(-36.5,-13.9), texts[9]);
    }
-    f += rect(uv3, vec2(-14.5, 28.5), vec2(2.6, 0.7));
-    t += write_5(uv3, vec2(-17,28), texts[2]);
-    f += rect(uv3, vec2(-14.5, 8.5), vec2(2.6, 0.7));
-    t += write_5(uv3, vec2(-17,8), texts[3]);
-    f += rect(uv3, vec2(21, 28.5), vec2(2.1, 0.7));
-    t += write_5(uv3, vec2(19,28), texts[4]);
-    f += rect(uv3, vec2(21, 8.5), vec2(2.1, 0.7));
-    t += write_5(uv3, vec2(19,8), texts[5]);
-    f += rect(uv3, vec2(-15.5, -11.5), vec2(1.6, 0.7));
-    t += write_5(uv3, vec2(-17,-12), texts[6]);
-    f += rect(uv3, vec2(20.5, -11.5), vec2(1.6, 0.7));
-    t += write_5(uv3, vec2(19,-12), texts[7]);

-    fragColor = mix(c, vec4(f - t), f);
+    f += rect(uv3, vec2(-35, 8.5), vec2(2.1, 0.7));
+
+    if (iDemo > 0) {
+        t += write_5(uv3, vec2(-37,8), texts[10]);
+    } else {
+        t += write_5(uv3, vec2(-37,8), texts[11]);
+    }
+
+    f += rect(uv3, vec2(0, 28.5), vec2(2.6, 0.7));
+    f += iActive1 == 1 ? h_rect(uv3, vec2(0, 28.5), vec2(3, 1), 0.2) : 0;
+    t += write_5(uv3, vec2(-2.5,28), texts[2]);
+
+    f += rect(uv3, vec2(0, -11.5), vec2(2.6, 0.7));
+    f += iActive1 == 2 ? h_rect(uv3, vec2(0, -11.5), vec2(3, 1), 0.2) : 0;
+    t += write_5(uv3, vec2(-2.5,-12), texts[3]);
+
+    f += rect(uv3, vec2(35, 28.5), vec2(2.1, 0.7));
+    f += iActive2 == 1 ? h_rect(uv3, vec2(35, 28.5), vec2(2.5, 1), 0.2) : 0;
+    t += write_5(uv3, vec2(33,28), texts[4]);
+
+    f += rect(uv3, vec2(35, -11.5), vec2(2.1, 0.7));
+    f += iActive2 == 2 ? h_rect(uv3, vec2(35, -11.5), vec2(2.5, 1), 0.2) : 0;
+    t += write_5(uv3, vec2(33,-12), texts[5]);
+
+    f += rect(uv3, vec2(0, 8.5), vec2(1.6, 0.7));
+    t += write_5(uv3, vec2(-1.5,8), texts[6]);
+
+    f += rect(uv3, vec2(35, 8.5), vec2(1.6, 0.7));
+    f += iActive2 == 3 ? h_rect(uv3, vec2(35, 8.5), vec2(2, 1), 0.2) : 0;
+    t += write_5(uv3, vec2(33.5,8), texts[7]);
+
+    f += rect(uv3, vec2(35, 6.75), vec2(2.8, 0.7));
+    t += write_int(uv3, vec2(32.4,6.1), iFPS, 2);
+    t += write_5(uv3, vec2(34.9,6.1), texts[8]);
+
+    fragColor = mix(c, vec4(min(1, f) - t), min(1, f));
 }
@@ -2,22 +2,28 @@

 // VIDEO 2
 // -----------
-// IN: 2 (RAW IN B)
-// OUT: 4 (IN B)
+// IN: 2+4 (RAW IN B)
+// OUT: 6 (IN B)

 in vec2 vUV;
 out vec4 fragColor;

-#include inc_yuv.glsl
+#include inc_yuyv.glsl

 uniform sampler2D iTex0;
 uniform sampler2D iTex2;
+uniform sampler2D iTex4;
 uniform int iInputFormat2;
+uniform int iInputSwap2;
 uniform vec2 iInputResolution2;

 void main() {
    if (iInputFormat2 == YUYV_FOURCC) {
-        fragColor = yuyvTex(iTex2, vUV, int(iInputResolution2.x));
+        if (iInputSwap2 > 0) {
+            fragColor = yuyvTex(iTex4, vUV, int(iInputResolution2.x));
+        } else {
+            fragColor = yuyvTex(iTex2, vUV, int(iInputResolution2.x));
+        }
    } else {
        fragColor = texture(iTex0, vUV);
    }
@@ -3,7 +3,7 @@

 // SRC A
 // -----------
-// OUT: 5 (FX A)
+// OUT: 7 (FX A)

 in vec2 vUV;
 out vec4 fragColor;
@@ -2,7 +2,7 @@

 // SRC B
 // -----------
-// OUT: 6 (FX B)
+// OUT: 8 (FX B)

 in vec2 vUV;
 out vec4 fragColor;
@@ -2,20 +2,20 @@

 // FX A
 // -------------
-// IN: 5 (SRC A)
-// IN: 7 (FX A)
-// OUT: 7 (A+B)
+// IN: 7 (SRC A)
+// IN: 9 (FX A)
+// OUT: 9 (A+B)

 in vec2 vUV;
 out vec4 fragColor;

 #include inc_fx.glsl

-uniform sampler2D iTex5;
 uniform sampler2D iTex7;
+uniform sampler2D iTex9;
 uniform int iSeed5;
 uniform vec3 iMidi2_1[7];

 void main() {
-    fragColor = fx_stage(vUV, iTex5, iTex7, iSeed5, iMidi2_1[0], iMidi2_1[1].xy, iMidi2_1[2], iMidi2_1[3].xy, iMidi2_1[4], iMidi2_1[5].xy, iMidi2_1[6]);
+    fragColor = fx_stage(vUV, iTex7, iTex9, iSeed5, iMidi2_1[0], iMidi2_1[1].xy, iMidi2_1[2], iMidi2_1[3].xy, iMidi2_1[4], iMidi2_1[5].xy, iMidi2_1[6]);
 }
@@ -2,20 +2,20 @@

 // FX B
 // -------------
-// IN: 6 (SRC B)
-// IN: 8 (FX B)
-// OUT: 8 (A+B)
+// IN: 8 (SRC B)
+// IN: 10 (FX B)
+// OUT: 10 (A+B)

 in vec2 vUV;
 out vec4 fragColor;

 #include inc_fx.glsl

-uniform sampler2D iTex6;
 uniform sampler2D iTex8;
+uniform sampler2D iTex10;
 uniform int iSeed6;
 uniform vec3 iMidi2_2[7];

 void main() {
-    fragColor = fx_stage(vUV, iTex6, iTex8, iSeed6, iMidi2_2[0], iMidi2_2[1].xy, iMidi2_2[2], iMidi2_2[3].xy, iMidi2_2[4], iMidi2_2[5].xy, iMidi2_2[6]);
+    fragColor = fx_stage(vUV, iTex8, iTex10, iSeed6, iMidi2_2[0], iMidi2_2[1].xy, iMidi2_2[2], iMidi2_2[3].xy, iMidi2_2[4], iMidi2_2[5].xy, iMidi2_2[6]);
 }
@@ -2,9 +2,9 @@

 // A+B
 // ------------
-// IN: 7 (FX A)
-// IN: 8 (FX B)
-// OUT: 9 (MFX)
+// IN: 9 (FX A)
+// IN: 10 (FX B)
+// OUT: 11 (MFX)

 in vec2 vUV;
 out vec4 fragColor;
@@ -12,8 +12,9 @@ out vec4 fragColor;
 #include inc_magic.glsl
 #include inc_functions.glsl

-uniform sampler2D iTex7;
-uniform sampler2D iTex8;
+uniform int iDemo;
+uniform sampler2D iTex9;
+uniform sampler2D iTex10;
 uniform int iSeed7;
 uniform vec3 iMidi3_1[2];

@@ -21,12 +22,16 @@ void main() {
    float mix_value = magic(iMidi3_1[1].xy, vec3(1, 0, 0), iSeed7);
    bool mix_type = magic_trigger(vec3(iMidi3_1[0].x, 0, 0), iSeed7 + 10);

-    vec4 color_a = texture(iTex7, vUV);
-    vec4 color_b = texture(iTex8, vUV);
+    vec4 color_a = texture(iTex9, vUV);
+    vec4 color_b = texture(iTex10, vUV);

    float k = mean(color_a);

-    mix_value = mix(mix_value * 0.9 + 0.05, mix_value, 1 - iDemo);
+    mix_value = mix(mix_value, mix_value * 0.9 + 0.05, iDemo);

-    fragColor = mix(color_b, color_a, mix_type ? step(mix_value, k) : mix_value);
+    if (mix_type) {
+        fragColor = mix(color_a, color_b, step(mix_value, k));    
+    } else {
+        fragColor = mix(color_b, color_a, mix_value);
+    }
 }
@@ -2,7 +2,7 @@

 // MFX
 // ------------
-// IN: 9 (A+B)
+// IN: 11 (A+B)
 // IN: 0 (OUT)
 // OUT: 0 (OUT)

@@ -11,16 +11,20 @@ out vec4 fragColor;

 #include inc_fx.glsl

-uniform sampler2D iTex9;
+uniform sampler2D iTex11;
 uniform sampler2D iTex0;
 uniform int iSeed8;
 uniform vec3 iMidi2_3[7];
 uniform vec3 iMidi3_1[2];
+uniform int iDemo;
+uniform int iAutoRand;

 void main() {
-    vec4 color = fx_stage(vUV, iTex9, iTex0, iSeed8, iMidi2_3[0], iMidi2_3[1].xy, iMidi2_3[2], iMidi2_3[3].xy, iMidi2_3[4], iMidi2_3[5].xy, iMidi2_3[6]);
+    vec4 color = fx_stage(vUV, iTex11, iTex0, iSeed8, iMidi2_3[0], iMidi2_3[1].xy, iMidi2_3[2], iMidi2_3[3].xy, iMidi2_3[4], iMidi2_3[5].xy, iMidi2_3[6]);

-    color = mix(color, vec4(0), iMidi3_1[0].y);
+    if (iDemo < 1 && iAutoRand < 1) {
+        color = mix(color, vec4(0), iMidi3_1[0].y);
+    }

    fragColor = color;
-}
+}
@@ -372,6 +372,20 @@ float write_int(vec2 uv, vec2 pos, uint value, uint magnitude)
    return d;
 }

+float write_int_left(vec2 uv, vec2 pos, uint value, uint magnitude)
+{
+    int i;
+    uint m = 1;
+    float d = 0;
+    for (i = 0; i < magnitude; i++) {
+        if (i == 0 || value >= m) {
+            pos.x += 1;
+            m *= 10u;
+        }
+    }
+    return write_int(uv, pos, value, magnitude);
+}
+
 int read(sampler2D tex, vec2 uv, float k, int d, float t)
 {
    float inv_k = 1 / k;
@@ -1,19 +1,19 @@
 #include inc_magic.glsl
 #include inc_functions.glsl
-#include inc_yuv.glsl
+#include inc_yuyv.glsl
 #include inc_cp437.glsl

 #ifndef INC_DEBUG
 #define INC_DEBUG

-uniform int iFPS;
-
 uniform vec2 iInputResolution1;
 uniform vec2 iInputResolution2;
 uniform int iInputFormat1;
 uniform int iInputFormat2;

+uniform int iDemo;
 uniform int iAutoRand;
+uniform int iAutoRandCycle;
 uniform int iPage;
 uniform int iSelected;

@@ -99,6 +99,7 @@ vec4 debug(vec2 vUV)
    float mfx_value = magic(iMidi2_3[6].xy, vec3(1, 0, 0), iSeed8);
    bool mfx_invert = magic_trigger(vec3(iMidi2_3[6].z, 0, 0), iSeed8);
    float mix_value = magic(iMidi3_1[1].xy, vec3(1, 0, 0), iSeed7);
+    mix_value = mix(mix_value, mix_value * 0.9 + 0.05, iDemo);
    bool mix_type = magic_trigger(vec3(iMidi3_1[0].x, 0, 0), iSeed7 + 10);

    // logic
@@ -109,7 +110,7 @@ vec4 debug(vec2 vUV)
        {0x54, 0x49, 0x4D, 0x45, 0x00}, // TIME
        {0x44, 0x45, 0x4D, 0x4F, 0x00}, // DEMO
        {0x4C, 0x49, 0x56, 0x45, 0x00}, // LIVE
-        {0x2B, 0x52, 0x41, 0x4E, 0x44}, // +RAND
+        {0x52, 0x41, 0x4E, 0x44, 0x00}, // RAND
        {0x53, 0x52, 0x43, 0x00, 0x00}, // SRC
        {0x46, 0x58, 0x00, 0x00, 0x00}, // FX
        {0x49, 0x4E, 0x00, 0x00, 0x00}, // IN
@@ -139,8 +140,17 @@ vec4 debug(vec2 vUV)
        rect(uv2, vec2(2, -1.55), vec2(0.1, 0.55)) +
        rect(uv2, vec2(0.55, 2), vec2(1.5, 0.1)) +
        rect(uv2, vec2(2, 1.55), vec2(0.1, 0.55)) +
-        rect(uv2, vec2(7.5, 0), vec2(1.5, 0.1)) +
-        h_rect(uv2, vec2(-9, -3.9), vec2(1), 0.1);
+        rect(uv2, vec2(6.8, 0), vec2(0.75, 0.1)) +
+        h_circle(uv2, vec2(7.8, 0), 0.3, 0.1)
+        ;
+    
+    if (iDemo < 1 && iInputFormat1 == YUYV_FOURCC) {
+        f += circle(uv2, vec2(-9, 2), 0.3);
+    }
+
+    if (iDemo < 1 && iInputFormat2 == YUYV_FOURCC) {
+        f += circle(uv2, vec2(-9, -2), 0.3);
+    }

    // show selected src/fx
    f += char_at(uv2, vec2(-5.4, 1.45), hex_chars[selected_srca]);
@@ -175,17 +185,17 @@ vec4 debug(vec2 vUV)

    f += write_5(uv3 * 0.75, vec2(-11.6,-1.8), texts[6]);
    f += write_5(uv3 * 0.75, vec2(-4.2,-1.8), texts[7]);
-    f += char_at(uv3 * 0.5, vec2(0.5, 0.5), 0x41);
-    f += char_at(uv3 * 0.5, vec2(0.5, -3), 0x42);
+    f += char_at(uv3 * 0.5, vec2(-11.5, 3.5), 0x41);
+    f += char_at(uv3 * 0.5, vec2(-11.5, -6), 0x42);
    if (iDemo < 1 && (iInputFormat1 == YUYV_FOURCC || iInputFormat2 == YUYV_FOURCC)) {
        f += write_5(uv3 * 0.75, vec2(-19.7,-1.8), texts[8]);
    }
    f += write_5(uv3 * 0.75, vec2(10.9,2), texts[9]);

    // show inputs / feedback
-    float line_a_a = rect(uv2, vec2(-8, 2), vec2(2, 0.1));
-    float line_a_b = rect(uv2, vec2(-7, 2), vec2(1, 0.1)) + rect(uv2, vec2(-8, 0.5), vec2(0.1, 1.6)) + rect(uv2, vec2(-9, -1), vec2(1, 0.1));
-    float line_a_f = rect(uv2, vec2(-6.5, 2), vec2(0.5, 0.1)) + rect(uv2, vec2(0, 4), vec2(7, 0.1)) + rect(uv2, vec2(-7, 3), vec2(0.1, 1.1)) + rect(uv2, vec2(7, 2), vec2(0.1, 2.1));
+    float line_a_a = rect(uv2, vec2(-7.5, 2), vec2(1.5, 0.1));
+    float line_a_b = rect(uv2, vec2(-6.5, 2), vec2(0.5, 0.1)) + rect(uv2, vec2(-8.5, -2), vec2(0.5, 0.1)) + line(uv2, vec2(-7, 2.1), vec2(-8, -2.1), 0.2);
+    float line_a_f = rect(uv2, vec2(-6.5, 2), vec2(0.5, 0.1)) + rect(uv2, vec2(0, 3.6), vec2(7, 0.1)) + rect(uv2, vec2(-7, 2.8), vec2(0.1, 0.9)) + rect(uv2, vec2(7, 1.8), vec2(0.1, 1.9));
    if (selected_srca == 5 && iInputFormat1 == YUYV_FOURCC) {
        f += line_a_a;
    } else if (selected_srca == 10 && iInputFormat2 == YUYV_FOURCC) {
@@ -193,9 +203,10 @@ vec4 debug(vec2 vUV)
    } else if (selected_srca % 5 == 0) {
        f += line_a_f;
    }
-    float line_b_a = rect(uv2, vec2(-6.5, -2), vec2(0.5, 0.1)) + rect(uv2, vec2(-7, -0.5), vec2(0.1, 1.6)) + rect(uv2, vec2(-8.5, 1), vec2(1.5, 0.1));
-    float line_b_b = rect(uv2, vec2(-8, -2), vec2(2, 0.1));
-    float line_b_f = rect(uv2, vec2(-6.5, -2), vec2(0.5, 0.1)) + rect(uv2, vec2(0, -4), vec2(7, 0.1)) + rect(uv2, vec2(-7, -3), vec2(0.1, 1.1)) + rect(uv2, vec2(7, -2), vec2(0.1, 2.1));
+
+    float line_b_a = rect(uv2, vec2(-6.5, -2), vec2(0.5, 0.1)) + rect(uv2, vec2(-8.5, 2), vec2(0.5, 0.1)) + line(uv2, vec2(-7, -2.1), vec2(-8, 2.1), 0.2);
+    float line_b_b = rect(uv2, vec2(-7.5, -2), vec2(1.5, 0.1));
+    float line_b_f = rect(uv2, vec2(-6.5, -2), vec2(0.5, 0.1)) + rect(uv2, vec2(0, -3.6), vec2(7, 0.1)) + rect(uv2, vec2(-7, -2.8), vec2(0.1, 0.9)) + rect(uv2, vec2(7, -1.8), vec2(0.1, 1.9));
    if (selected_srcb == 5 && iInputFormat1 == YUYV_FOURCC) {
        f += line_b_a;
    } else if (selected_srcb == 10 && iInputFormat2 == YUYV_FOURCC) {
@@ -205,7 +216,9 @@ vec4 debug(vec2 vUV)
    }

    // show page
-    f += char_at(uv2, vec2(-9.2, -4.3), hex_chars[iPage]);
+    f += iPage == 0 ? circle(uv2, vec2(-0.75, -4.1), 0.3) : h_circle(uv2, vec2(-0.75, -4.1), 0.25, 0.1);
+    f += iPage == 1 ? circle(uv2, vec2(0, -4.1), 0.3) : h_circle(uv2, vec2(0, -4.1), 0.20, 0.1);
+    f += iPage == 2 ? circle(uv2, vec2(0.75, -4.1), 0.3) : h_circle(uv2, vec2(0.75, -4.1), 0.20, 0.1);

    // show fx values
    float fx_rect = 0;
@@ -223,33 +236,25 @@ vec4 debug(vec2 vUV)
    float x = 0;

    x = -15;
-    f += write_5(uv3, vec2(x,13), texts[0]);
-    f += write_int(uv3, vec2(x - 3.5,13), iFPS, 3);
-    v = min(1, iFPS/60.0);
-    f += h_rect(uv3, vec2(x, 12), vec2(4, 0.5), 0.2);
-    f += rect(uv3, vec2(x + 4 * v - 4, 12), vec2(4 * v, 0.4));
-    
-    x = 0;
-    f += write_5(uv3, vec2(x,13), texts[1]);
-    f += write_int(uv3, vec2(x - 3.5,13), int(iTempo), 3);
+    f += write_5(uv3, vec2(x - 4.5,13), texts[1]);
+    f += write_int(uv3, vec2(x + 1.5,13), int(iTempo), 3);
    v = fract(iBeats);
    f += h_rect(uv3, vec2(x, 12), vec2(4, 0.5), 0.2);
    f += rect(uv3, vec2(x + 4 * v - 4, 12), vec2(4 * v, 0.4));

    x = 15;
-    f += write_5(uv3, vec2(x,13), texts[2]);
-    f += write_int(uv3, vec2(x - 5.5,13), int(iTime), 5);
-    v = fract(iTime);
+    if (iAutoRand > 0) {
+        f += write_5(uv3, vec2(x - 4.5,13), texts[5]);
+        f += write_int(uv3, vec2(x - 0.5,13), int(iAutoRandCycle), 5);
+        v = fract(iBeats / iAutoRandCycle);
+    } else {
+        f += write_int(uv3, vec2(x - 0.5,13), int(iTime), 5);
+        v = fract(iTime);
+        f += write_5(uv3, vec2(x - 4.5,13), texts[2]);
+    }
    f += h_rect(uv3, vec2(x, 12), vec2(4, 0.5), 0.2);
    f += rect(uv3, vec2(x + 4 * v - 4, 12), vec2(4 * v, 0.4));

-    if (iAutoRand > 0) {
-        f += write_5(uv3, vec2(-4,-15), iDemo > 0 ? texts[3] : texts[4]);
-        f += write_5(uv3, vec2(0,-15), texts[5]);
-    } else {
-        f += write_5(uv3, vec2(-2,-15), iDemo > 0 ? texts[3] : texts[4]);
-    }
-
    return vec4(f);
 }

@@ -2,6 +2,8 @@
 #define PI 3.1415927
 #endif

+#include inc_time.glsl
+#include inc_rand.glsl
 #include inc_res.glsl

 #ifndef INC_FUNCTIONS
@@ -224,6 +226,10 @@ float circle(vec2 uv, vec2 c, float size) {
    return istep(size, length(uv - c));
 }

+float h_circle(vec2 uv, vec2 c, float size, float k) {
+    return circle(uv, c, size + k * 0.5) - circle(uv, c, size - k * 0.5);
+}
+
 float stripe(float x, float k1, float k2)
 {
    return k2 > k1 ? (1 - step(x, k1)) * (step(x, k2)) : ((1 - step(x, k2)) * (step(x, k1)));
@@ -3,13 +3,11 @@
 #ifndef INC_MAGIC
 #define INC_MAGIC

-uniform int iDemo;
-
 vec2 magic_f(vec2 F, vec3 B, float i)
 {
    return vec2(
-        mix(F.x, randTime(i + 1), min(1, B.z + iDemo)),
-        mix(F.y, randTime(i + 2), min(1, B.z + iDemo))
+        mix(F.x, randTime(i + 1), min(1, B.z)),
+        mix(F.y, randTime(i + 2), min(1, B.z))
    );
 }

@@ -21,9 +19,9 @@ vec2 magic_f(float i)
 vec3 magic_b(vec3 B, float i)
 {
    return vec3(
-        mix(B.x, step(0.2, randTime(i + 3)), min(1, B.z + iDemo)),
-        mix(B.y, step(0.5, randTime(i + 4)), min(1, B.z + iDemo)),
-        min(1, B.z + iDemo)
+        mix(B.x, step(0.2, randTime(i + 3)), min(1, B.z)),
+        mix(B.y, step(0.5, randTime(i + 4)), min(1, B.z)),
+        min(1, B.z)
    );
 }

@@ -5,6 +5,8 @@
 #ifndef INC_SRC
 #define INC_SRC

+uniform int iDemo;
+
 uniform sampler2D iTex0;
 uniform sampler2D iTex3;
 uniform sampler2D iTex4;
@@ -99,7 +101,7 @@ subroutine(src_stage_sub) vec4 src_3(vec2 vUV, int seed, vec3 b1, vec2 f1, vec3
    return vec4(f);
 }

-// SRC 4 : waves
+// SRC 4 : circuit
 subroutine(src_stage_sub) vec4 src_4(vec2 vUV, int seed, vec3 b1, vec2 f1, vec3 b2, vec2 f2, vec3 b3, vec2 f3)
 {
    // start
@@ -110,34 +112,123 @@ subroutine(src_stage_sub) vec4 src_4(vec2 vUV, int seed, vec3 b1, vec2 f1, vec3

    // controls

-    float spacing = magic(f1, b1, seed + 10);
-    float thickness = magic(f2, b2, seed + 20);
-    float scroll = magic_reverse(f3, b3, seed + 30);
+    float z = 10 + magic(f1, b1, 123) * 20;
+    float h = magic(f2, b2, seed + 20) * 0.8 + 0.1;
+    float v = magic_reverse(f3, b3, seed + 30) * 0.8 + 0.1;

    // logic

-    vec2 uv2 = uv1;
-    uv2.y += 0.5;
-    uv2 *= 2.25;
-    uv2 = vec2((uv2.x + 1) * 0.5, -uv2.y);
-    float m1 = spacing * 4.5 + 0.5;
-    float y = log(-uv2.y) * m1;
-    y = mod(y + scroll * 5.0 - iBeats / 16, 5.);
-    float id = floor(y) * 32;
-    float s = cos(uv2.x * rand(id + 837) * 100 + rand(id + 281) * PI)
-                + cos(uv2.x * rand(id + 231) * 100 + rand(id + 526) * PI)
-                + cos(uv2.x * rand(id + 746) * 100 + rand(id + 621) * PI)
-                + cos(uv2.x * rand(id + 235) * 100 + rand(id + 315) * PI)
-                + cos(uv2.x * rand(id + 782) * 100 + rand(id + 314) * PI)
-                + cos(uv2.x * rand(id + 241) * 100 + rand(id + 734) * PI)
-                + cos(uv2.x * rand(id + 416) * 100 + rand(id + 425) * PI)
-                + cos(uv2.x * rand(id + 315) * 100 + rand(id + 525) * PI)
-                + cos(uv2.x * rand(id + 423) * 100 + rand(id + 743) * PI)
-                + cos(uv2.x * rand(id + 637) * 100 + rand(id + 245) * PI);
-    s *= 0.1;
-    float cut =  0.025 + thickness * 0.475;
-    float y2 = min(1.0, -(uv2.y));
-    float f = (0.1 + 0.9 * (cos((y2 + 1.0) * PI) * 0.5 + 0.5)) * istep(0, uv2.y) * istep(cut, fract(y + (s - 1) * (1 - cut) * 0.5));
+    uv1 *= z;
+    uv1 += iBeats;
+
+    float s0 = rand(floor(mod(uv1, 1000))) * 1000;
+    float s1 = rand(floor(mod(uv1 + vec2(0, 1), 1000))) * 1000;
+    float s2 = rand(floor(mod(uv1 - vec2(1, 0), 1000))) * 1000;
+
+    bool up = rand(s1 + 1) < h;
+    bool left = rand(s2 + 2) < v;
+    bool down = rand(s0 + 1) < h;
+    bool right = rand(s0 + 2) < v;
+    bool up_down = up && down;
+    bool left_right = left && right;
+
+    uv1 = mod(uv1, 1.0) - 0.5;
+
+    const float t = 0.1;
+
+    float f = 0;
+    int c = 0;
+
+    if (up) {
+        f += stripe(uv1.x, -t * 0.5, t * 0.5) * step(-t * 0.5, uv1.y);
+        c += 1;
+    }
+
+    if (down) {
+        f += stripe(uv1.x, -t * 0.5, t * 0.5) * istep(t * 0.5, uv1.y);
+        c += 1;
+    }
+
+    if (left) {
+        f += stripe(uv1.y, -t * 0.5, t * 0.5) * istep(t * 0.5, uv1.x);
+        c += 1;
+    }
+
+    if (right) {
+        f += stripe(uv1.y, -t * 0.5, t * 0.5) * step(-t * 0.5, uv1.x);
+        c += 1;
+    }
+
+    if (c == 1) {
+        f += istep(t, length(uv1));
+    }
+
+    f = min(f, 1);
+
+    if ((up_down ^^ left_right) && c == 2) {
+        if (up_down) {
+            uv1.xy = uv1.yx;
+        }
+        if (rand(s0 + 3) < 0.5) {
+            uv1.x = -uv1.x;
+        }
+        float k = rand(s0 + 4) * 60;
+        f -= rect(uv1, vec2(0), vec2(t * 3, t));
+        f = max(0, f);
+        if (k < 10) { // resistor
+            f += line(uv1, vec2(-t * 3.25, -t * 0.5), vec2(-t * 2.5, t * 2), t * 0.75);
+            f += line(uv1, vec2(-t * 2.5, t * 2), vec2(-t * 1.5, -t * 2), t * 0.75);
+            f += line(uv1, vec2(-t * 1.5, -t * 2), vec2(-t * 0.5, t * 2), t * 0.75);
+            f += line(uv1, vec2(-t * 0.5, t * 2), vec2(t * 0.5, -t * 2), t * 0.75);
+            f += line(uv1, vec2(t * 0.5, -t * 2), vec2(t * 1.5, t * 2), t * 0.75);
+            f += line(uv1, vec2(t * 1.5, t * 2), vec2(t * 2.5, -t * 2), t * 0.75);
+            f += line(uv1, vec2(t * 2.5, -t * 2), vec2(t * 3.25, t * 0.5), t * 0.75);
+        } else if (k < 20) { // capacitor
+            f += rect(uv1, vec2(-t * 2, 0), vec2(t, t * 0.5));
+            f += rect(uv1, vec2(t * 2, 0), vec2(t, t * 0.5));
+            f += rect(uv1, vec2(t, 0), vec2(t * 0.5, t * 3.5));
+            f += rect(uv1, vec2(-t, 0), vec2(t * 0.5, t * 3.5));
+        } else if (k < 30) { // diode
+            f += line(uv1, vec2(-t * 2, t * 2.5), vec2(t * 2, 0), t);
+            f += line(uv1, vec2(-t * 2, -t * 2.5), vec2(t * 2, 0), t);
+            f += rect(uv1, vec2(t * 2.5, 0), vec2(t * 0.5, t * 3));
+            f += rect(uv1, vec2(-t * 2.5, 0), vec2(t * 0.5, t * 3));
+        } else if (k < 40) { // lamp
+            f += istep(t * 3.5, length(uv1));
+            f -= istep(t * 2.5, length(uv1));
+            f += line(uv1, vec2(-t * 2), vec2(t * 2), t);
+            f += line(uv1, vec2(-t * 2, t * 2), vec2(t * 2, -t * 2), t);
+        } else if (k < 50) { // inductor
+            f += istep(t * 2, length(uv1 - vec2(t * 2.5,0)));
+            f += istep(t * 2, length(uv1 - vec2(0,0)));
+            f += istep(t * 2, length(uv1 - vec2(-t * 2.5,0)));
+            f -= 2 * istep(t, length(uv1 - vec2(t * 2.5,0)));
+            f -= 2 * istep(t, length(uv1 - vec2(0,0)));
+            f -= 2 * istep(t, length(uv1 - vec2(-t * 2.5,0)));
+            f *= step(-t * 0.5, uv1.y);
+        } else if (k < 60) { // switch
+            f += istep(t, length(uv1 - vec2(t * 2.5, 0)));
+            f += istep(t, length(uv1 + vec2(t * 2.5, 0)));
+            f += line(uv1, vec2(t * 2, 0), vec2(-t * 2.5, t * (k < 55 ? 3 : 1)), t);
+        }
+    } else if (c == 3) {
+        if (left_right) {
+            uv1.xy = uv1.yx;
+            if (up) {
+                uv1.x = -uv1.x;
+            }
+        } else if (right) {
+            uv1.x = -uv1.x;
+        }
+        float k = rand(s0 + 4) * 20;
+        if (k < 10) {
+            f -= rect(uv1, vec2(0), vec2(t * 3));
+            f = max(0, f);
+            f += rect(uv1, vec2(-t * 3, 0), vec2(t * 0.5, t * 3));
+            f += line(uv1, vec2(t * 0.25, t * 3.25), vec2(-t * 3, t), t);
+            f += line(uv1, vec2(t * 0.25, -t * 3.25), vec2(-t * 3, -t), t);
+        }
+    }
    
    return vec4(f);
 }
@@ -1,9 +1,9 @@
-#ifndef INC_YUV
-#define INC_YUV
+#ifndef INC_YUYV
+#define INC_YUYV

 const int YUYV_FOURCC = 1448695129;

-const mat3x3 yuv_to_rgb = {{1,1,1},{0,-0.39465,2.03211},{1.13983,-0.5806,0}};
+const mat3x3 yuyv_to_rgb = {{1,1,1},{0,-0.39465,2.03211},{1.13983,-0.5806,0}};

 vec4 yuyvTex(sampler2D tex, vec2 vUV, int base_width) {
    float w = base_width - 1;
@@ -22,7 +22,7 @@ vec4 yuyvTex(sampler2D tex, vec2 vUV, int base_width) {
        tV.y - 0.5
    );

-    return vec4(yuv_to_rgb * yuv, 1.0);
+    return vec4(yuyv_to_rgb * yuv, 1.0);
 }

 #endif
@@ -1,165 +1,169 @@
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+    <mxGraphModel dx="2022" dy="698" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
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-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-16" value="UNIFORMS" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="3Uv0AfHo8SbA6Qcxonjd-15">
-          <mxGeometry x="0.1111" relative="1" as="geometry">
-            <mxPoint x="-10" y="-19" as="offset" />
-          </mxGeometry>
-        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-19" value="OUTPUT&lt;br&gt;SHADER" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-19" value="OUTPUT&lt;br&gt;SHADER" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="530" y="270" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-23" value="MONITOR&lt;br&gt;SHADER" style="rounded=0;whiteSpace=wrap;html=1;dashed=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-23" value="MONITOR&lt;br&gt;SHADER" style="rounded=0;whiteSpace=wrap;html=1;dashed=1;" parent="1" vertex="1">
          <mxGeometry x="530" y="360" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-24" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;dashed=1;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-24" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;dashed=1;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="420" y="320" as="sourcePoint" />
            <mxPoint x="520" y="360" as="targetPoint" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-25" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-25" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="420" y="290" as="sourcePoint" />
            <mxPoint x="520" y="290" as="targetPoint" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-26" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-26" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="349.5" y="585" as="sourcePoint" />
-            <mxPoint x="349.5" y="495" as="targetPoint" />
+            <mxPoint x="350" y="500" as="targetPoint" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-27" value="COMPILES&lt;br&gt;TO" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="3Uv0AfHo8SbA6Qcxonjd-26">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-27" value="COMPILES&lt;br&gt;TO" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" parent="3Uv0AfHo8SbA6Qcxonjd-26" vertex="1" connectable="0">
          <mxGeometry x="0.1111" relative="1" as="geometry">
            <mxPoint x="-55" y="-15" as="offset" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-28" value="SHADER" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-28" value="SHADER" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="274" y="590" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-29" value="SHADER" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-29" value="SHADER" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="284" y="600" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-30" value="GLSL FILE&lt;br&gt;1...N" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-30" value="GLSL FILES&lt;br&gt;1...N" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="294" y="610" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-31" value="MIDI INPUT" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
-          <mxGeometry x="10" y="420" width="120" height="60" as="geometry" />
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-31" value="MIDI&lt;br&gt;INPUT" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
+          <mxGeometry x="460" y="610" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-36" value="TEXTURE" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-36" value="TEXTURE" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="-10" y="250" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-37" value="TEXTURE" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-37" value="TEXTURE" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry y="260" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-38" value="VIDEO DEVICE&lt;br&gt;1...N" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-38" value="VIDEO DEVICE&lt;br&gt;1...N" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="10" y="270" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-39" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-39" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="660" y="299.5" as="sourcePoint" />
            <mxPoint x="760" y="299.5" as="targetPoint" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-40" value="OUTPUT&lt;br&gt;WINDOW" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-40" value="OUTPUT&lt;br&gt;WINDOW" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="770" y="270" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-41" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;dashed=1;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-41" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;dashed=1;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="660" y="389.5" as="sourcePoint" />
            <mxPoint x="760" y="389.5" as="targetPoint" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-42" value="MONITOR&lt;br&gt;WINDOW" style="rounded=0;whiteSpace=wrap;html=1;dashed=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-42" value="MONITOR&lt;br&gt;WINDOW" style="rounded=0;whiteSpace=wrap;html=1;dashed=1;" parent="1" vertex="1">
          <mxGeometry x="770" y="360" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-43" value="CONTEXT" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-43" value="STATE" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="530" y="460" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-46" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-46" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="510" y="490" as="sourcePoint" />
            <mxPoint x="430" y="450" as="targetPoint" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-47" value="UNIFORMS" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" vertex="1" connectable="0" parent="3Uv0AfHo8SbA6Qcxonjd-46">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-47" value="UNIFORMS" style="edgeLabel;html=1;align=center;verticalAlign=middle;resizable=0;points=[];" parent="3Uv0AfHo8SbA6Qcxonjd-46" vertex="1" connectable="0">
          <mxGeometry x="0.1111" relative="1" as="geometry">
            <mxPoint x="25" y="-18" as="offset" />
          </mxGeometry>
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-52" value="MIDI OUTPUT" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-52" value="MIDI OUTPUT" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1">
          <mxGeometry x="770" y="460" width="120" height="60" as="geometry" />
        </mxCell>
-        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-55" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" edge="1" parent="1">
+        <mxCell id="3Uv0AfHo8SbA6Qcxonjd-55" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;" parent="1" edge="1">
          <mxGeometry width="50" height="50" relative="1" as="geometry">
            <mxPoint x="660" y="490" as="sourcePoint" />
            <mxPoint x="760" y="490" as="targetPoint" />
          </mxGeometry>
        </mxCell>
+        <mxCell id="WElHySgPOBnYc4yB3MP0-2" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;entryX=0.744;entryY=0.914;entryDx=0;entryDy=0;entryPerimeter=0;" edge="1" parent="1" target="3Uv0AfHo8SbA6Qcxonjd-1">
+          <mxGeometry width="50" height="50" relative="1" as="geometry">
+            <mxPoint x="520" y="600" as="sourcePoint" />
+            <mxPoint x="539.58" y="530" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="WElHySgPOBnYc4yB3MP0-4" value="KEYBOARD&lt;br&gt;INPUT" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+          <mxGeometry x="620" y="610" width="120" height="60" as="geometry" />
+        </mxCell>
+        <mxCell id="WElHySgPOBnYc4yB3MP0-5" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;entryX=0.872;entryY=0.914;entryDx=0;entryDy=0;entryPerimeter=0;" edge="1" parent="1" target="3Uv0AfHo8SbA6Qcxonjd-1">
+          <mxGeometry width="50" height="50" relative="1" as="geometry">
+            <mxPoint x="680" y="600" as="sourcePoint" />
+            <mxPoint x="679.58" y="530" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
      </root>
    </mxGraphModel>
  </diagram>
@@ -33,8 +33,6 @@ UNIFORM_BEATS=iBeats
 UNIFORM_FPS=iFPS
 # 0/1 if demo
 UNIFORM_DEMO=iDemo
-# 0/1 if auto random
-UNIFORM_AUTORAND=iAutoRand
 # Seed for shader X
 UNIFORM_SEED_PREFIX=iSeed

@@ -10,7 +10,6 @@ uniform float iTempo; // current tempo in bpm
 uniform float iBeats; // elapsed beats since last tempo reset
 uniform int iFPS; // output window frames per seconds
 uniform int iDemo; // 0/1 if demo mode
-uniform int iAutoRand; // 0/1 if auto random mode
 uniform int iSeed1; // a random seed assigned at start
 uniform vec2 iResolution; // output window resolution in pixels
 uniform vec3 iMidi1_1[20]; // all midi inputs defined
@@ -13,61 +13,65 @@
 #include "string.h"

 static void print_help(int status_code) {
-  puts(PACKAGE
-       " " VERSION "\n\n"
-       "usage: " PACKAGE " "
-       "[-h] "
-       "[-v] "
-       "[-p=PROJECT_PATH] "
-       "[-c=CFG_FILE] "
-       "[-hr] "
-       "[-s=SCREEN] "
-       "[-m=SCREEN] "
-       "[-mo] "
-       "[-w] "
-       "[-t=TEMPO] "
-       "[-d] "
-       "[-ar / -nar] "
-       "[-v=FILE] "
-       "[-vs=SIZE] "
-       "[-is=SIZE] "
-       "[-sf=STATE_PATH] "
-       "[-ls / -nls] "
-       "[-ss / -nss] "
-       "[-tm] "
-       "[-tf] "
-       "\n\n"
-       "Fusion Of Real-time Generative Effects.\n\n"
-       "options:\n"
-       "  -h, --help                show this help message and exit\n"
-       "  -v, --version             print version\n"
-       "  -p, --project             forge project directory (default: " DATADIR
-       "/default)\n"
-       "  -c, --config              config file name (default: "
-       "forge_project.cfg)\n"
-       "  -hr, --hot-reload         hot reload of shaders scripts\n"
-       "  -s, --screen              output screen number (default: primary)\n"
-       "  -m, --monitor             monitor screen number (default: none)\n"
-       "  -mo, --monitor-only       no output screen\n"
-       "  -w, --windowed            not fullscreen\n"
-       "  -t, --tempo               base tempo (default: 60)\n"
-       "  -d, --demo                demonstration mode (assume "
-       "--no-save-state, --no-load-state, --auto-random)\n"
-       "  -ar, --auto-random        randomize state every 4 beats\n"
-       "  -nar, --no-auto-random    do not randomize state (default)\n"
-       "  -v, --video-in            path to video capture device (multiple "
-       "allowed)\n"
-       "  -vs, --video-size         video capture desired height (default: "
-       "internal texture height)\n"
-       "  -is, --internal-size      internal texture height (default: 720)\n"
-       "  -sf, --state-file         saved state file (default: "
-       "forge_saved_state.txt)\n"
-       "  -ls, --load-state         load saved state (default)\n"
-       "  -nls, --no-load-state     do not load saved state\n"
-       "  -ss, --save-state         save state (default)\n"
-       "  -nss, --no-save-state     do not save state\n"
-       "  -tm, --trace-midi         print midi code and values\n"
-       "  -tf, --trace-fps          print fps status of subsystems\n");
+  puts(
+      PACKAGE
+      " " VERSION "\n\n"
+      "usage: " PACKAGE " "
+      "[-h] "
+      "[-v] "
+      "[-p=PROJECT_PATH] "
+      "[-c=CFG_FILE] "
+      "[-hr] "
+      "[-s=SCREEN] "
+      "[-m=SCREEN] "
+      "[-mo] "
+      "[-w] "
+      "[-t=TEMPO] "
+      "[-d] "
+      "[-ar / -nar] "
+      "[-arc=CYCLES] "
+#ifdef VIDEO_IN
+      "[-vi=FILE] "
+      "[-vs=SIZE] "
+#endif /* VIDEO_IN */
+      "[-is=SIZE] "
+      "[-ls / -nls] "
+      "[-ss / -nss] "
+      "[-tm] "
+      "[-tf] "
+      "\n\n"
+      "Fusion Of Real-time Generative Effects.\n\n"
+      "options:\n"
+      "  -h, --help                  show this help message and exit\n"
+      "  -v, --version               print version\n"
+      "  -p, --project               forge project directory (default: " DATADIR
+      "/default)\n"
+      "  -c, --config                config file name (default: "
+      "forge_project.cfg)\n"
+      "  -hr, --hot-reload           hot reload of shaders scripts\n"
+      "  -s, --screen                output screen number (default: primary)\n"
+      "  -m, --monitor               monitor screen number (default: none)\n"
+      "  -mo, --monitor-only         no output screen\n"
+      "  -w, --windowed              not fullscreen\n"
+      "  -t, --tempo                 base tempo (default: 60)\n"
+      "  -d, --demo                  demonstration mode (assume "
+      "--no-save-state, --no-load-state, --auto-random)\n"
+      "  -ar, --auto-random          randomize state every cycle (4 beats)\n"
+      "  -nar, --no-auto-random      do not randomize state (default)\n"
+      "  -arc, --auto-random-cycle   auto random cycle length (default: 4)\n"
+#ifdef VIDEO_IN
+      "  -vi, --video-in             path to video capture device (multiple "
+      "allowed)\n"
+      "  -vs, --video-size           video capture desired height (default: "
+      "internal texture height)\n"
+#endif /* VIDEO_IN */
+      "  -is, --internal-size        internal texture height (default: 720)\n"
+      "  -ls, --load-state           load saved state (default)\n"
+      "  -nls, --no-load-state       do not load saved state\n"
+      "  -ss, --save-state           save state (default)\n"
+      "  -nss, --no-save-state       do not save state\n"
+      "  -tm, --trace-midi           print midi code and values\n"
+      "  -tf, --trace-fps            print fps status of subsystems\n");
  exit(status_code);
 }

@@ -124,10 +128,10 @@ void args_parse(Parameters *params, int argc, char **argv) {
  params->base_tempo = 60.0f;
  params->demo = false;
  params->auto_random = false;
+  params->auto_random_cycle = 4;
  params->video_in.length = 0;
  params->video_size = 0;
  params->internal_size = 720;
-  strlcpy(params->state_file, "forge_saved_state.txt", STR_LEN);
  params->load_state = true;
  params->save_state = true;
  params->trace_midi = false;
@@ -168,25 +172,36 @@ void args_parse(Parameters *params, int argc, char **argv) {
      params->auto_random = true;
    } else if (is_arg(arg, "-nar") || is_arg(arg, "--no-auto-random")) {
      params->auto_random = false;
-    } else if (is_arg(arg, "-v") || is_arg(arg, "--video-in")) {
+    } else if (is_arg(arg, "-arc") || is_arg(arg, "--auto-random-cycle")) {
+      params->auto_random_cycle = parse_uint(arg, value);
+      if (params->auto_random_cycle == 0) {
+        invalid_value(arg, value);
+      }
+    } else if (is_arg(arg, "-vi") || is_arg(arg, "--video-in")) {
+#ifdef VIDEO_IN
      if (params->video_in.length == MAX_VIDEO) {
        log_error("maximum video input reached");
        exit(EXIT_FAILURE);
      }
      strlcpy(params->video_in.values[params->video_in.length++], value,
              STR_LEN);
+#else
+      invalid_arg(arg);
+#endif /* VIDEO_IN */
    } else if (is_arg(arg, "-vs") || is_arg(arg, "--video-size")) {
+#ifdef VIDEO_IN
      params->video_size = parse_uint(arg, value);
      if (params->video_size == 0) {
        invalid_value(arg, value);
      }
+#else
+      invalid_arg(arg);
+#endif /* VIDEO_IN */
    } else if (is_arg(arg, "-is") || is_arg(arg, "--internal-size")) {
      params->internal_size = parse_uint(arg, value);
      if (params->internal_size == 0) {
        invalid_value(arg, value);
      }
-    } else if (is_arg(arg, "-sf") || is_arg(arg, "--state-file")) {
-      strlcpy(params->state_file, value, STR_LEN);
    } else if (is_arg(arg, "-ls") || is_arg(arg, "--load-state")) {
      params->load_state = true;
    } else if (is_arg(arg, "-nls") || is_arg(arg, "--no-load-state")) {
@@ -75,9 +75,12 @@ void config_file_read(ConfigFile *config, const char *path) {
  file_read(&file, path);

  if (file.error) {
+    config->error = true;
    return;
  }

+  config->error = false;
+
  line = strtok_r(file.content, "\n", &rest);

  while (line != NULL) {
@@ -88,6 +91,17 @@ void config_file_read(ConfigFile *config, const char *path) {
  file_free(&file);
 }

+bool config_file_has(const ConfigFile *config, const char *key) {
+  ConfigFileItem c_key;
+  const ConfigFileItem *item;
+
+  strlcpy(c_key.key, key, STR_LEN);
+
+  item = (const ConfigFileItem *)hashmap_get(config->map, &c_key);
+
+  return item != NULL && strnlen(item->value, STR_LEN) > 0;
+}
+
 const char *config_file_get_str(const ConfigFile *config, const char *key,
                                const char *default_value) {
  ConfigFileItem c_key;
@@ -5,6 +5,8 @@

 void config_file_read(ConfigFile *config, const char *path);

+bool config_file_has(const ConfigFile *config, const char *key);
+
 const char *config_file_get_str(const ConfigFile *config, const char *key,
                                const char *default_value);

@@ -57,23 +57,18 @@ static void compute_fps(bool trace_fps) {
  }
 }

-static void init_context(const Parameters *params, unsigned int in_count) {
-  state_init(context, &project.state_config, params->demo, params->auto_random,
-             params->base_tempo, params->state_file, params->load_state);
+static void init_context(const Parameters *params) {
+  context = shared_init_context("/" PACKAGE "_context");

-  context->monitor = params->monitor;
+  context->stop = false;
+
+  state_init(context, &project.state_config, params->demo, params->auto_random,
+             params->auto_random_cycle, params->base_tempo, params->load_state);

  memset(context->input_resolutions, 0, sizeof(context->input_resolutions));
  memset(context->input_formats, 0, sizeof(context->input_formats));
  memset(context->input_fps, 0, sizeof(context->input_fps));
-
-  for (unsigned int i = 0; i < in_count; i++) {
-    if (!inputs.values[i].error) {
-      context->input_resolutions[i][0] = inputs.values[i].width;
-      context->input_resolutions[i][1] = inputs.values[i].height;
-      context->input_formats[i] = inputs.values[i].pixelformat;
-    }
-  }
+  memset(context->input_swap, 0, sizeof(context->input_swap));
 }

 static void free_context() { shared_close_context(context); }
@@ -82,11 +77,18 @@ static void reload_shader(unsigned int i) {
  shaders_update(&program, &project.fragment_shaders[i][0], i, &project);
 }

+#ifdef VIDEO_IN
 static void init_inputs(const StringArray *video_in, unsigned int video_size) {
  inputs.length = video_in->length;

  for (unsigned int i = 0; i < video_in->length; i++) {
    video_init(&inputs.values[i], video_in->values[i], video_size);
+
+    if (!inputs.values[i].error) {
+      context->input_resolutions[i][0] = inputs.values[i].width;
+      context->input_resolutions[i][1] = inputs.values[i].height;
+      context->input_formats[i] = inputs.values[i].pixelformat;
+    }
  }
 }

@@ -97,7 +99,6 @@ static bool start_video_captures(unsigned int video_count, bool trace_fps) {
      return false;
    }
  }
-
  return true;
 }

@@ -108,6 +109,7 @@ static void free_video_captures(unsigned int video_count) {
    video_free(&inputs.values[i]);
  }
 }
+#endif /* VIDEO_IN */

 static void error_callback(int error, const char *description) {
  log_error("[GLFW] %d: %s", error, description);
@@ -118,36 +120,105 @@ static void error_callback(int error, const char *description) {

 static void key_callback(Window *window, int key,
                         __attribute__((unused)) int scancode, int action,
-                         __attribute__((unused)) int mods) {
+                         int mods) {
+  unsigned int event;
+
+  event = window_read_key(key, action, mods);
+
  if (window_escape_key(key, action)) {
    // close window on escape key
    log_info("[ESC] Closing...");
    window_close(window);
-  } else if (window_char_key(key, action, 82)) {
-    // R: randomize
-    log_info("[R] Randomized");
-    state_randomize(context, &project.state_config);
-    state_apply(context, &project.state_config, &midi);
-  } else if (window_char_key(key, action, 48)) {
-    // 0: reset
-    log_info("[0] Reset");
-    state_reset(context);
-    state_apply(context, &project.state_config, &midi);
-  } else if (window_char_key(key, action, 68)) {
-    // D: demo on/off
-    log_info((context->demo ? "[D] Demo OFF" : "[D] Demo ON"));
-    context->demo = !context->demo;
-  } else if (window_char_key(key, action, 65)) {
-    // A: auto random on/off
-    log_info(
-        (context->auto_random ? "[A] Auto Random OFF" : "[A] Auto Random ON"));
-    context->auto_random = !context->auto_random;
+  } else if (event > 0) {
+    state_key_event(context, &project.state_config, event, &midi);
  }
 }

 static void midi_callback(unsigned char code, unsigned char value) {
-  state_apply_event(context, &project.state_config, &midi, code, value,
-                    trace_midi);
+  state_midi_event(context, &project.state_config, &midi, code, value,
+                   trace_midi);
+}
+
+static bool init(const Parameters *params) {
+  project_init(&project, params->project_path, params->config_file);
+
+  if (project.error) {
+    return false;
+  }
+
+  init_context(params);
+
+#ifdef VIDEO_IN
+  init_inputs(&params->video_in, params->video_size);
+
+  if (!start_video_captures(params->video_in.length, params->trace_fps)) {
+    return false;
+  }
+#endif /* VIDEO_IN */
+
+  midi_open(&midi, config_file_get_str(&project.config, "MIDI_HW", "hw"));
+
+  if (midi.error) {
+    context->demo = true;
+  } else {
+    trace_midi = params->trace_midi;
+
+    if (!midi_background_listen(&midi, context, midi_callback)) {
+      return false;
+    }
+  }
+
+  if (!state_background_write(context, &project.state_config, &midi)) {
+    return false;
+  }
+
+  window_startup(error_callback);
+
+  context->tex_resolution[1] = params->internal_size;
+
+  if (params->output) {
+    window_output = window_init(PACKAGE " " VERSION, params->output_screen,
+                                params->windowed, NULL, key_callback);
+
+    window_use(window_output, context);
+
+    shaders_init(&program, &project, context, false);
+  } else {
+    window_output = NULL;
+  }
+
+  if (params->monitor) {
+    window_monitor =
+        window_init(PACKAGE " " VERSION " (monitor)", params->monitor_screen,
+                    params->windowed, window_output, key_callback);
+
+    window_use(window_monitor, context);
+
+    shaders_init(&program, &project, context, window_output != NULL);
+  } else {
+    window_monitor = NULL;
+  }
+
+#ifdef VIDEO_IN
+  shaders_link_inputs(&program, &project, &inputs);
+#endif /* VIDEO_IN */
+
+  if (program.error) {
+    context->stop = true;
+    window_terminate();
+    exit(EXIT_FAILURE);
+  }
+
+  timer_init(&timer, 30);
+
+  log_info("Initialized");
+
+  return true;
+}
+
+static bool should_close() {
+  return (window_output != NULL && window_should_close(window_output)) ||
+         (window_monitor != NULL && window_should_close(window_monitor));
 }

 static void loop(bool hr, bool trace_fps) {
@@ -179,87 +250,11 @@ static void loop(bool hr, bool trace_fps) {
  window_events();
 }

-void forge_run(const Parameters *params) {
-  context = shared_init_context("/" PACKAGE "_context");
-
-  context->stop = false;
-
-  project_init(&project, params->project_path, params->config_file);
-
-  if (project.error) {
-    return;
-  }
-
-  init_inputs(&params->video_in, params->video_size);
-
-  init_context(params, project.in_count);
-
-  if (!start_video_captures(params->video_in.length, params->trace_fps)) {
-    return;
-  }
-
-  midi_open(&midi, config_file_get_str(&project.config, "MIDI_HW", "hw"));
-
-  if (midi.error) {
-    context->demo = true;
-  } else {
-    trace_midi = params->trace_midi;
-
-    if (!midi_background_listen(&midi, context, midi_callback)) {
-      return;
-    }
-  }
-
-  if (!state_background_write(context, &project.state_config, &midi)) {
-    return;
-  }
-
-  window_startup(error_callback);
-
-  context->tex_resolution[1] = params->internal_size;
-
-  if (params->output) {
-    window_output = window_init(PACKAGE " " VERSION, params->output_screen,
-                                params->windowed, NULL, key_callback);
-
-    window_use(window_output, context);
-
-    shaders_init(&program, &project, context, &inputs, false);
-  } else {
-    window_output = NULL;
-  }
-
-  if (params->monitor) {
-    window_monitor =
-        window_init(PACKAGE " " VERSION " (monitor)", params->monitor_screen,
-                    params->windowed, window_output, key_callback);
-
-    window_use(window_monitor, context);
-
-    shaders_init(&program, &project, context, &inputs, window_output != NULL);
-  } else {
-    window_monitor = NULL;
-  }
-
-  if (program.error) {
-    context->stop = true;
-    window_terminate();
-    exit(EXIT_FAILURE);
-  }
-
-  timer_init(&timer, 30);
-
-  log_info("Initialized");
-
-  while ((window_output == NULL || !window_should_close(window_output)) &&
-         (window_monitor == NULL || !window_should_close(window_monitor))) {
-    loop(params->hot_reload, params->trace_fps);
-  }
-
+static void shutdown(const Parameters *params) {
  context->stop = true;

  if (params->save_state) {
-    state_save(context, &project.state_config, params->state_file);
+    state_save(context, &project.state_config);
  }

  shaders_free(&program);
@@ -276,11 +271,25 @@ void forge_run(const Parameters *params) {
    shaders_free_window(&program, params->output);
  }

+#ifdef VIDEO_IN
  free_video_captures(params->video_in.length);
+#endif /* VIDEO_IN */

  free_context();

  project_free(&project);

  window_terminate();
+}
+
+void forge_run(const Parameters *params) {
+  if (!init(params)) {
+    return;
+  }
+
+  while (!should_close()) {
+    loop(params->hot_reload, params->trace_fps);
+  }
+
+  shutdown(params);
 }
@@ -21,6 +21,10 @@ void midi_open(MidiDevice *device, const char *name) {

 void midi_write(const MidiDevice *device, unsigned char code,
                unsigned char value) {
+  if (device->error) {
+    return;
+  }
+
  unsigned char buffer[3];

  buffer[0] = 0xB0;
@@ -14,11 +14,15 @@
 #define GLAD_GL_IMPLEMENTATION
 #include <glad/gl.h>

+#ifdef VIDEO_IN
 #define GLAD_EGL_IMPLEMENTATION
 #include <glad/egl.h>
+#endif /* VIDEO_IN */

 #include <GLFW/glfw3.h>
+#ifdef VIDEO_IN
 #include <GLFW/glfw3native.h>
+#endif /* VIDEO_IN */

 static const GLuint unused_uniform = (GLuint)-1;

@@ -38,6 +42,7 @@ bool check_glerror(ShaderProgram *program) {
 static void init_gl(ShaderProgram *program) {
  gladLoadGL(glfwGetProcAddress);

+#ifdef VIDEO_IN
  program->egl_display = glfwGetEGLDisplay();
  if (program->egl_display == EGL_NO_DISPLAY) {
    log_error("error: glfwGetEGLDisplay no EGLDisplay returned");
@@ -46,6 +51,7 @@ static void init_gl(ShaderProgram *program) {
  }

  gladLoadEGL(program->egl_display, glfwGetProcAddress);
+#endif /* VIDEO_IN */
 }

 static void init_textures(ShaderProgram *program,
@@ -80,9 +86,12 @@ static void rebind_textures(const ShaderProgram *program) {
  }
 }

+#ifdef VIDEO_IN
 static void link_input_to_texture(ShaderProgram *program, VideoCapture *input,
-                                  unsigned int texture_index) {
-  input->dma_image = EGL_NO_IMAGE_KHR;
+                                  unsigned int texture_index, bool swap) {
+  EGLImageKHR dma_image;
+
+  dma_image = EGL_NO_IMAGE_KHR;

  // https://registry.khronos.org/EGL/extensions/EXT/EGL_EXT_image_dma_buf_import.txt
  const EGLint attrib_list[] = {EGL_WIDTH,
@@ -92,18 +101,23 @@ static void link_input_to_texture(ShaderProgram *program, VideoCapture *input,
                                EGL_LINUX_DRM_FOURCC_EXT,
                                input->pixelformat,
                                EGL_DMA_BUF_PLANE0_FD_EXT,
-                                input->exp_fd,
+                                swap ? input->exp_fd_swap : input->exp_fd,
                                EGL_DMA_BUF_PLANE0_OFFSET_EXT,
                                0,
                                EGL_DMA_BUF_PLANE0_PITCH_EXT,
                                input->bytesperline,
                                EGL_NONE};

-  input->dma_image =
-      eglCreateImageKHR(program->egl_display, EGL_NO_CONTEXT,
-                        EGL_LINUX_DMA_BUF_EXT, NULL, attrib_list);
+  dma_image = eglCreateImageKHR(program->egl_display, EGL_NO_CONTEXT,
+                                EGL_LINUX_DMA_BUF_EXT, NULL, attrib_list);

-  if (input->dma_image == EGL_NO_IMAGE_KHR) {
+  if (swap) {
+    input->dma_image_swap = dma_image;
+  } else {
+    input->dma_image = dma_image;
+  }
+
+  if (dma_image == EGL_NO_IMAGE_KHR) {
    log_error("(%s) eglCreateImageKHR failed %04x", input->name, eglGetError());
    return;
  }
@@ -130,12 +144,18 @@ static void init_input(ShaderProgram *program, const ConfigFile *config,
    if (i < inputs->length && !inputs->values[i].error) {
      snprintf(name, STR_LEN, "IN_%d_OUT", i + 1);
      tex_i = config_file_get_int(config, name, 0);
-      link_input_to_texture(program, &inputs->values[i], tex_i);
+      link_input_to_texture(program, &inputs->values[i], tex_i, false);
+      if (inputs->values[i].with_swap) {
+        snprintf(name, STR_LEN, "IN_%d_SWAP_OUT", i + 1);
+        tex_i = config_file_get_int(config, name, 0);
+        link_input_to_texture(program, &inputs->values[i], tex_i, true);
+      }
    } else {
      log_warn("Cannot link input %d", i + 1);
    }
  }
 }
+#endif /* VIDEO_IN */

 static void init_framebuffers(ShaderProgram *program,
                              const ConfigFile *config) {
@@ -280,6 +300,9 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
  program->iautorand_locations[i] = glGetUniformLocation(
      program->programs[i],
      config_file_get_str(config, "UNIFORM_AUTORAND", "iAutoRand"));
+  program->iautorandcycle_locations[i] = glGetUniformLocation(
+      program->programs[i],
+      config_file_get_str(config, "UNIFORM_AUTORANDCYCLE", "iAutoRandCycle"));
  program->ipage_locations[i] = glGetUniformLocation(
      program->programs[i],
      config_file_get_str(config, "UNIFORM_PAGE", "iPage"));
@@ -310,6 +333,13 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
        glGetUniformLocation(program->programs[i], name);
  }

+  prefix = config_file_get_str(config, "UNIFORM_IN_SWAP_PREFIX", "iInputSwap");
+  for (unsigned int j = 0; j < program->in_count; j++) {
+    snprintf(name, STR_LEN, "%s%d", prefix, j + 1);
+    program->iinswap_locations[i * program->in_count + j] =
+        glGetUniformLocation(program->programs[i], name);
+  }
+
  prefix = config_file_get_str(config, "UNIFORM_SEED_PREFIX", "iSeed");
  for (unsigned int j = 0; j < program->frag_count; j++) {
    snprintf(name, STR_LEN, "%s%d", prefix, j + 1);
@@ -388,90 +418,6 @@ static void init_programs(ShaderProgram *program, const ConfigFile *config,
  }
 }

-void shaders_init(ShaderProgram *program, const Project *project,
-                  const SharedContext *context, VideoCaptureArray *inputs,
-                  bool rebind) {
-  if (!rebind) {
-    program->error = false;
-    program->last_resolution[0] = context->resolution[0];
-    program->last_resolution[1] = context->resolution[1];
-    program->tex_count = config_file_get_int(&project->config, "TEX_COUNT", 9);
-    program->frag_count = project->frag_count;
-    program->frag_output_index =
-        config_file_get_int(&project->config, "FRAG_OUTPUT", 1) - 1;
-    program->frag_monitor_index =
-        config_file_get_int(&project->config, "FRAG_MONITOR", 1) - 1;
-    program->sub_type_count =
-        config_file_get_int(&project->config, "SUB_TYPE_COUNT", 0);
-    program->in_count = config_file_get_int(&project->config, "IN_COUNT", 0);
-    program->sub_variant_count = project->state_config.state_max;
-    program->active_count = project->state_config.midi_active_counts.length;
-    program->midi_lengths.length = 0;
-
-    init_gl(program);
-
-    if (check_glerror(program)) {
-      return;
-    }
-
-    init_shaders(program, project);
-
-    if (program->error || check_glerror(program)) {
-      return;
-    }
-
-    init_textures(program, context);
-
-    if (check_glerror(program)) {
-      return;
-    }
-
-    init_input(program, &project->config, inputs);
-
-    if (check_glerror(program)) {
-      return;
-    }
-
-    init_framebuffers(program, &project->config);
-
-    if (check_glerror(program)) {
-      return;
-    }
-
-    init_programs(program, &project->config, &project->state_config);
-
-    if (check_glerror(program)) {
-      return;
-    }
-
-    init_vertices(program);
-
-    if (check_glerror(program)) {
-      return;
-    }
-  }
-
-  bind_vertices(program, rebind ? 1 : 0);
-
-  if (check_glerror(program)) {
-    return;
-  }
-}
-
-void shaders_update(ShaderProgram *program, const File *fragment_shader,
-                    unsigned int i, const Project *project) {
-  bool result;
-
-  result = compile_shader(program->fragment_shaders[i], fragment_shader->path,
-                          fragment_shader->content);
-
-  if (result) {
-    init_single_program(program, i, &project->config, &project->state_config);
-
-    log_info("Program %d updated", i + 1);
-  }
-}
-
 static void update_viewport(ShaderProgram *program,
                            const SharedContext *context) {
  // viewport changed
@@ -545,6 +491,8 @@ static void use_program(const ShaderProgram *program, int i, bool output,
  write_uniform_1i(program->idemo_locations[i], context->demo ? 1 : 0);
  write_uniform_1i(program->iautorand_locations[i],
                   context->auto_random ? 1 : 0);
+  write_uniform_1i(program->iautorandcycle_locations[i],
+                   context->auto_random_cycle);
  write_uniform_1i(program->ipage_locations[i], context->page);
  write_uniform_1i(program->iselected_locations[i], context->selected + 1);
  write_uniform_2f(program->ires_locations[i], &context->resolution);
@@ -562,6 +510,8 @@ static void use_program(const ShaderProgram *program, int i, bool output,
                     context->input_formats[j]);
    write_uniform_1i(program->iinfps_locations[i * program->in_count + j],
                     context->input_fps[j]);
+    write_uniform_1i(program->iinswap_locations[i * program->in_count + j],
+                     context->input_swap[j] ? 1 : 0);
  }

  // set seeds uniforms
@@ -612,6 +562,94 @@ static void use_program(const ShaderProgram *program, int i, bool output,
  glDrawArrays(GL_TRIANGLES, 0, 6);
 }

+void shaders_init(ShaderProgram *program, const Project *project,
+                  const SharedContext *context, bool rebind) {
+  if (!rebind) {
+    program->error = false;
+    program->last_resolution[0] = context->resolution[0];
+    program->last_resolution[1] = context->resolution[1];
+    program->tex_count = config_file_get_int(&project->config, "TEX_COUNT", 9);
+    program->frag_count = project->frag_count;
+    program->frag_output_index =
+        config_file_get_int(&project->config, "FRAG_OUTPUT", 1) - 1;
+    program->frag_monitor_index =
+        config_file_get_int(&project->config, "FRAG_MONITOR", 1) - 1;
+    program->sub_type_count =
+        config_file_get_int(&project->config, "SUB_TYPE_COUNT", 0);
+    program->in_count = config_file_get_int(&project->config, "IN_COUNT", 0);
+    program->sub_variant_count = project->state_config.state_max;
+    program->active_count = project->state_config.midi_active_counts.length;
+    program->midi_lengths.length = 0;
+
+    init_gl(program);
+
+    if (check_glerror(program)) {
+      return;
+    }
+
+    init_shaders(program, project);
+
+    if (program->error || check_glerror(program)) {
+      return;
+    }
+
+    init_textures(program, context);
+
+    if (check_glerror(program)) {
+      return;
+    }
+
+    init_framebuffers(program, &project->config);
+
+    if (check_glerror(program)) {
+      return;
+    }
+
+    init_programs(program, &project->config, &project->state_config);
+
+    if (check_glerror(program)) {
+      return;
+    }
+
+    init_vertices(program);
+
+    if (check_glerror(program)) {
+      return;
+    }
+  }
+
+  bind_vertices(program, rebind ? 1 : 0);
+
+  if (check_glerror(program)) {
+    return;
+  }
+}
+
+void shaders_link_inputs(ShaderProgram *program, const Project *project,
+                         VideoCaptureArray *inputs) {
+#ifdef VIDEO_IN
+  init_input(program, &project->config, inputs);
+
+  if (check_glerror(program)) {
+    return;
+  }
+#endif /* VIDEO_IN */
+}
+
+void shaders_update(ShaderProgram *program, const File *fragment_shader,
+                    unsigned int i, const Project *project) {
+  bool result;
+
+  result = compile_shader(program->fragment_shaders[i], fragment_shader->path,
+                          fragment_shader->content);
+
+  if (result) {
+    init_single_program(program, i, &project->config, &project->state_config);
+
+    log_info("Program %d updated", i + 1);
+  }
+}
+
 void shaders_compute(ShaderProgram *program, const SharedContext *context,
                     bool monitor, bool output_only) {
  if (!output_only) {
@@ -652,7 +690,12 @@ void shaders_free_window(const ShaderProgram *program, bool secondary) {

 void shaders_free_input(const ShaderProgram *program,
                        const VideoCapture *input) {
+#ifdef VIDEO_IN
  if (!input->error && input->dma_image != EGL_NO_IMAGE_KHR) {
    eglDestroyImageKHR(program->egl_display, input->dma_image);
  }
+  if (!input->error && input->dma_image_swap != EGL_NO_IMAGE_KHR) {
+    eglDestroyImageKHR(program->egl_display, input->dma_image_swap);
+  }
+#endif /* VIDEO_IN */
 }
@@ -4,8 +4,10 @@
 #define SHADERS_H

 void shaders_init(ShaderProgram *program, const Project *project,
-                  const SharedContext *context, VideoCaptureArray *inputs,
-                  bool rebind);
+                  const SharedContext *context, bool rebind);
+
+void shaders_link_inputs(ShaderProgram *program, const Project *project,
+                         VideoCaptureArray *inputs);

 void shaders_update(ShaderProgram *program, const File *fragment_shader,
                    unsigned int i, const Project *project);
@@ -12,6 +12,233 @@
 #include "state.h"
 #include "tempo.h"

+static void safe_midi_write(const MidiDevice *midi, unsigned int code,
+                            unsigned char value) {
+  if (code != UNSET_MIDI_CODE) {
+    midi_write(midi, code, value);
+  }
+}
+
+static void update_page(const SharedContext *context,
+                        const StateConfig *state_config,
+                        const MidiDevice *midi) {
+  unsigned int page_item_min;
+  unsigned int page_item_max;
+  // SHOW PAGE
+  for (unsigned int i = 0; i < state_config->select_page_codes.length; i++) {
+    safe_midi_write(midi, state_config->select_page_codes.values[i],
+                    i == context->page ? MIDI_MAX : 0);
+  }
+
+  // SHOW PAGE ITEM
+  page_item_min = state_config->select_item_codes.length * context->page;
+  page_item_max = page_item_min + state_config->select_item_codes.length;
+
+  if (context->state.values[context->selected] >= page_item_min &&
+      context->state.values[context->selected] < page_item_max) {
+    for (unsigned int i = 0; i < state_config->select_item_codes.length; i++) {
+      safe_midi_write(midi, state_config->select_item_codes.values[i],
+                      i == context->state.values[context->selected] -
+                                  page_item_min
+                          ? MIDI_MAX
+                          : 0);
+    }
+  } else {
+    for (unsigned int i = 0; i < state_config->select_item_codes.length; i++) {
+      safe_midi_write(midi, state_config->select_item_codes.values[i], 0);
+    }
+  }
+}
+
+static void update_active(const SharedContext *context,
+                          const StateConfig *state_config,
+                          const MidiDevice *midi) {
+  unsigned int k;
+
+  for (unsigned int i = 0; i < state_config->midi_active_counts.length; i++) {
+    for (unsigned int j = 0; j < state_config->midi_active_counts.values[i];
+         j++) {
+      k = state_config->midi_active_offsets.values[i] + j;
+      safe_midi_write(midi, state_config->midi_active_codes.values[k],
+                      context->active[i] == j ? MIDI_MAX : 0);
+    }
+  }
+}
+
+static void update_values(const SharedContext *context,
+                          const StateConfig *state_config,
+                          const MidiDevice *midi) {
+  unsigned int j;
+  unsigned int k;
+  unsigned int part;
+
+  for (unsigned int i = 0; i < state_config->midi_codes.length; i++) {
+    j = i / 3;
+    part = arr_uint_remap_index(state_config->midi_offsets, &j);
+    k = state_config->values_offsets.values[part] +
+        context->active[part] * state_config->midi_counts.values[part] + j;
+    safe_midi_write(midi, state_config->midi_codes.values[i],
+                    context->values[k][i % 3] * MIDI_MAX);
+  }
+}
+
+static void reset(SharedContext *context) {
+  memset(context->values, 0, sizeof(context->values));
+  memset(context->state.values, 0, sizeof(context->state.values));
+}
+
+static void randomize(SharedContext *context, const StateConfig *state_config) {
+  unsigned int j;
+  unsigned int l;
+  unsigned int part;
+
+  for (unsigned int i = 0; i < state_config->midi_codes.length; i++) {
+    j = i / 3;
+    part = arr_uint_remap_index(state_config->midi_offsets, &j);
+    for (unsigned int k = 0; k < state_config->midi_active_counts.values[part];
+         k++) {
+      l = state_config->values_offsets.values[part] +
+          k * state_config->midi_counts.values[part] + j;
+
+      if (arr_uint_index_of(state_config->fader_codes,
+                            state_config->midi_codes.values[i]) !=
+          ARRAY_NOT_FOUND) {
+        context->values[l][i % 3] = (float)rand_uint(MIDI_MAX + 1) / MIDI_MAX;
+      } else {
+        context->values[l][i % 3] = rand_uint(2) == 1 ? 1 : 0;
+      }
+    }
+  }
+
+  for (unsigned int i = 0; i < context->state.length; i++) {
+    context->state.values[i] = rand_uint(state_config->state_max);
+  }
+}
+
+static void load_from_file(SharedContext *context,
+                           const StateConfig *state_config,
+                           const char *state_file) {
+  ConfigFile saved_state;
+  char key[STR_LEN];
+
+  config_file_read(&saved_state, state_file);
+
+  if (saved_state.error) {
+    return;
+  }
+
+  tempo_set(&context->tempo,
+            config_file_get_int(&saved_state, "tempo", context->tempo.tempo));
+  context->page = config_file_get_int(&saved_state, "page", 0);
+  context->selected = config_file_get_int(&saved_state, "selected", 0);
+
+  for (unsigned int i = 0; i < context->state.length; i++) {
+    snprintf(key, STR_LEN, "seed_%d", i);
+    context->seeds[i] =
+        config_file_get_int(&saved_state, key, context->seeds[i]);
+    snprintf(key, STR_LEN, "state_%d", i);
+    context->state.values[i] = config_file_get_int(&saved_state, key, 0);
+  }
+
+  for (unsigned int i = 0; i < state_config->midi_active_counts.length; i++) {
+    snprintf(key, STR_LEN, "active_%d", i);
+    context->active[i] = config_file_get_int(&saved_state, key, 0);
+  }
+
+  for (unsigned int i = 0; i < state_config->value_count; i++) {
+    snprintf(key, STR_LEN, "value_%d_x", i);
+    context->values[i][0] =
+        (float)config_file_get_int(&saved_state, key, 0) / MIDI_MAX;
+    snprintf(key, STR_LEN, "value_%d_y", i);
+    context->values[i][1] =
+        (float)config_file_get_int(&saved_state, key, 0) / MIDI_MAX;
+    snprintf(key, STR_LEN, "value_%d_z", i);
+    context->values[i][2] =
+        (float)config_file_get_int(&saved_state, key, 0) / MIDI_MAX;
+  }
+
+  config_file_free(&saved_state);
+}
+
+static void load_from_default_file(SharedContext *context,
+                                   const StateConfig *state_config) {
+  char state_file[STR_LEN];
+
+  snprintf(state_file, STR_LEN, "%s.txt", state_config->save_file_prefix);
+
+  load_from_file(context, state_config, state_file);
+}
+
+static void load_from_index_file(SharedContext *context,
+                                 const StateConfig *state_config,
+                                 unsigned int index) {
+  char state_file[STR_LEN];
+
+  snprintf(state_file, STR_LEN, "%s.%d.txt", state_config->save_file_prefix,
+           index);
+
+  load_from_file(context, state_config, state_file);
+}
+
+static void save_to_file(const SharedContext *context,
+                         const StateConfig *state_config,
+                         const char *state_file) {
+  StringArray lines;
+
+  log_info("Saving state to '%s'...", state_file);
+
+  lines.length = 0;
+
+  snprintf(lines.values[lines.length++], STR_LEN, "tempo=%d",
+           (unsigned int)context->tempo.tempo);
+  snprintf(lines.values[lines.length++], STR_LEN, "page=%d", context->page);
+  snprintf(lines.values[lines.length++], STR_LEN, "selected=%d",
+           context->selected);
+
+  for (unsigned int i = 0; i < context->state.length; i++) {
+    snprintf(lines.values[lines.length++], STR_LEN, "seed_%d=%d", i,
+             context->seeds[i]);
+    snprintf(lines.values[lines.length++], STR_LEN, "state_%d=%d", i,
+             context->state.values[i]);
+  }
+
+  for (unsigned int i = 0; i < state_config->midi_active_counts.length; i++) {
+    snprintf(lines.values[lines.length++], STR_LEN, "active_%d=%d", i,
+             context->active[i]);
+  }
+
+  for (unsigned int i = 0; i < state_config->value_count; i++) {
+    snprintf(lines.values[lines.length++], STR_LEN, "value_%d_x=%d", i,
+             (unsigned int)(context->values[i][0] * MIDI_MAX));
+    snprintf(lines.values[lines.length++], STR_LEN, "value_%d_y=%d", i,
+             (unsigned int)(context->values[i][1] * MIDI_MAX));
+    snprintf(lines.values[lines.length++], STR_LEN, "value_%d_z=%d", i,
+             (unsigned int)(context->values[i][2] * MIDI_MAX));
+  }
+
+  file_write(state_file, &lines);
+}
+
+static void save_to_default_file(const SharedContext *context,
+                                 const StateConfig *state_config) {
+  char state_file[STR_LEN];
+
+  snprintf(state_file, STR_LEN, "%s.txt", state_config->save_file_prefix);
+
+  save_to_file(context, state_config, state_file);
+}
+
+static void save_to_index_file(const SharedContext *context,
+                               const StateConfig *state_config,
+                               unsigned int index) {
+  char state_file[STR_LEN];
+
+  snprintf(state_file, STR_LEN, "%s.%d.txt", state_config->save_file_prefix,
+           index);
+
+  save_to_file(context, state_config, state_file);
+}
+
 void state_parse_config(StateConfig *state_config, const ConfigFile *config) {
  unsigned int offset;
  unsigned int count;
@@ -118,82 +345,81 @@ void state_parse_config(StateConfig *state_config, const ConfigFile *config) {

  state_config->tap_tempo_code =
      config_file_get_int(config, "TAP_TEMPO", UNSET_MIDI_CODE);
-}

-static void safe_midi_write(const MidiDevice *midi, unsigned int code,
-                            unsigned char value) {
-  if (code != UNSET_MIDI_CODE) {
-    midi_write(midi, code, value);
-  }
-}
+  strlcpy(state_config->save_file_prefix,
+          config_file_get_str(config, "SAVE_FILE_PREFIX", "forge_save"),
+          STR_LEN);

-static void update_page(const SharedContext *context,
-                        const StateConfig *state_config,
-                        const MidiDevice *midi) {
-  unsigned int page_item_min;
-  unsigned int page_item_max;
-  // SHOW PAGE
-  for (unsigned int i = 0; i < state_config->select_page_codes.length; i++) {
-    safe_midi_write(midi, state_config->select_page_codes.values[i],
-                    i == context->page ? MIDI_MAX : 0);
-  }
+  state_config->hotkey_randomize =
+      config_file_get_int(config, "HOTKEY_RANDOMIZE", 82);
+  state_config->hotkey_reset =
+      config_file_get_int(config, "HOTKEY_RESET", 1082);
+  state_config->hotkey_demo = config_file_get_int(config, "HOTKEY_DEMO", 68);
+  state_config->hotkey_autorand =
+      config_file_get_int(config, "HOTKEY_AUTORAND", 65);
+  state_config->hotkey_autorand_down =
+      config_file_get_int(config, "HOTKEY_AUTORAND_DOWN", 263);
+  state_config->hotkey_autorand_up =
+      config_file_get_int(config, "HOTKEY_AUTORAND_UP", 262);
+  state_config->hotkey_tempo_down =
+      config_file_get_int(config, "HOTKEY_TEMPO_DOWN", 264);
+  state_config->hotkey_tempo_up =
+      config_file_get_int(config, "HOTKEY_TEMPO_UP", 265);

-  // SHOW PAGE ITEM
-  page_item_min = state_config->select_item_codes.length * context->page;
-  page_item_max = page_item_min + state_config->select_item_codes.length;
+  if (config_file_has(config, "HOTKEY_LOAD_COUNT")) {
+    state_config->hotkey_load.length =
+        config_file_get_int(config, "HOTKEY_LOAD_COUNT", 0);

-  if (context->state.values[context->selected] >= page_item_min &&
-      context->state.values[context->selected] < page_item_max) {
-    for (unsigned int i = 0; i < state_config->select_item_codes.length; i++) {
-      safe_midi_write(midi, state_config->select_item_codes.values[i],
-                      i == context->state.values[context->selected] -
-                                  page_item_min
-                          ? MIDI_MAX
-                          : 0);
+    for (unsigned int i = 0; i < state_config->hotkey_load.length; i++) {
+      snprintf(name, STR_LEN, "HOTKEY_LOAD_%d", i + 1);
+      state_config->hotkey_load.values[i] =
+          config_file_get_int(config, name, 0);
    }
  } else {
-    for (unsigned int i = 0; i < state_config->select_item_codes.length; i++) {
-      safe_midi_write(midi, state_config->select_item_codes.values[i], 0);
+    state_config->hotkey_load.length = 10;
+    state_config->hotkey_load.values[0] = 49;
+    state_config->hotkey_load.values[1] = 50;
+    state_config->hotkey_load.values[2] = 51;
+    state_config->hotkey_load.values[3] = 52;
+    state_config->hotkey_load.values[4] = 53;
+    state_config->hotkey_load.values[5] = 54;
+    state_config->hotkey_load.values[6] = 55;
+    state_config->hotkey_load.values[7] = 56;
+    state_config->hotkey_load.values[8] = 57;
+    state_config->hotkey_load.values[9] = 48;
+  }
+
+  if (config_file_has(config, "HOTKEY_SAVE_COUNT")) {
+    state_config->hotkey_save.length =
+        config_file_get_int(config, "HOTKEY_SAVE_COUNT", 0);
+
+    for (unsigned int i = 0; i < state_config->hotkey_save.length; i++) {
+      snprintf(name, STR_LEN, "HOTKEY_SAVE_%d", i + 1);
+      state_config->hotkey_save.values[i] =
+          config_file_get_int(config, name, 0);
    }
+  } else {
+    state_config->hotkey_save.length = 10;
+    state_config->hotkey_save.values[0] = 1049;
+    state_config->hotkey_save.values[1] = 1050;
+    state_config->hotkey_save.values[2] = 1051;
+    state_config->hotkey_save.values[3] = 1052;
+    state_config->hotkey_save.values[4] = 1053;
+    state_config->hotkey_save.values[5] = 1054;
+    state_config->hotkey_save.values[6] = 1055;
+    state_config->hotkey_save.values[7] = 1056;
+    state_config->hotkey_save.values[8] = 1057;
+    state_config->hotkey_save.values[9] = 1048;
  }
 }

-static void update_active(const SharedContext *context,
-                          const StateConfig *state_config,
-                          const MidiDevice *midi) {
-  unsigned int k;
-
-  for (unsigned int i = 0; i < state_config->midi_active_counts.length; i++) {
-    for (unsigned int j = 0; j < state_config->midi_active_counts.values[i];
-         j++) {
-      k = state_config->midi_active_offsets.values[i] + j;
-      safe_midi_write(midi, state_config->midi_active_codes.values[k],
-                      context->active[i] == j ? MIDI_MAX : 0);
-    }
-  }
-}
-
-static void update_values(const SharedContext *context,
-                          const StateConfig *state_config,
-                          const MidiDevice *midi) {
+void state_midi_event(SharedContext *context, const StateConfig *state_config,
+                      const MidiDevice *midi, unsigned char code,
+                      unsigned char value, bool trace_midi) {
+  unsigned int i;
  unsigned int j;
  unsigned int k;
  unsigned int part;
-
-  for (unsigned int i = 0; i < state_config->midi_codes.length; i++) {
-    j = i / 3;
-    part = arr_uint_remap_index(state_config->midi_offsets, &j);
-    k = state_config->values_offsets.values[part] +
-        context->active[part] * state_config->midi_counts.values[part] + j;
-    safe_midi_write(midi, state_config->midi_codes.values[i],
-                    context->values[k][i % 3] * MIDI_MAX);
-  }
-}
-
-void state_apply_event(SharedContext *context, const StateConfig *state_config,
-                       const MidiDevice *midi, unsigned char code,
-                       unsigned char value, bool trace_midi) {
-  unsigned int i, j, k, part;
  bool found;

  found = false;
@@ -281,10 +507,60 @@ void state_apply_event(SharedContext *context, const StateConfig *state_config,
  }
 }

-void state_apply(const SharedContext *context, const StateConfig *state_config,
-                 const MidiDevice *midi) {
-  if (!midi->error) {
+void state_key_event(SharedContext *context, const StateConfig *state_config,
+                     unsigned int code, const MidiDevice *midi) {
+  unsigned int index;
+
+  if (code == state_config->hotkey_randomize) {
+    log_info("[%d] Randomized", code);
+    randomize(context, state_config);
    update_values(context, state_config, midi);
+  } else if (code == state_config->hotkey_reset) {
+    log_info("[%d] Reset", code);
+    reset(context);
+    update_values(context, state_config, midi);
+  } else if (code == state_config->hotkey_demo) {
+    log_info((context->demo ? "[%d] Demo OFF" : "[%d] Demo ON"), code);
+    context->demo = !context->demo;
+  } else if (code == state_config->hotkey_autorand) {
+    log_info(
+        (context->auto_random ? "[%d] Auto Random OFF" : "[%d] Auto Random ON"),
+        code);
+    context->auto_random = !context->auto_random;
+  } else if (code == state_config->hotkey_autorand_down) {
+    if (context->auto_random_cycle > 1) {
+      context->auto_random_cycle -= 1;
+    }
+    log_info("[%d] Auto Random Cycle: %d", code, context->auto_random_cycle);
+  } else if (code == state_config->hotkey_autorand_up) {
+    context->auto_random_cycle += 1;
+    log_info("[%d] Auto Random Cycle: %d", code, context->auto_random_cycle);
+  } else if (code == state_config->hotkey_tempo_up) {
+    tempo_set(&context->tempo, context->tempo.tempo + 1);
+    log_info("[%d] Tempo: %f", code, context->tempo);
+  } else if (code == state_config->hotkey_tempo_down) {
+    if (context->tempo.tempo > 0) {
+      tempo_set(&context->tempo, context->tempo.tempo - 1);
+    }
+    log_info("[%d] Tempo: %f", code, context->tempo);
+  } else {
+    index = arr_uint_index_of(state_config->hotkey_load, code);
+
+    if (index != ARRAY_NOT_FOUND) {
+      log_info("[%d] Loading state %d", code, index + 1);
+      load_from_index_file(context, state_config, index + 1);
+      return;
+    }
+
+    index = arr_uint_index_of(state_config->hotkey_save, code);
+
+    if (index != ARRAY_NOT_FOUND) {
+      log_info("[%d] Saving state %d", code, index + 1);
+      save_to_index_file(context, state_config, index + 1);
+      return;
+    }
+
+    log_info("[%d] No hotkey defined", code);
  }
 }

@@ -292,7 +568,10 @@ bool state_background_write(SharedContext *context,
                            const StateConfig *state_config,
                            const MidiDevice *midi) {
  pid_t pid;
-  bool beat_active, last_active, change, last_change;
+  bool beat_active;
+  bool last_active;
+  bool change;
+  bool last_change;

  pid = fork();
  if (pid < 0) {
@@ -314,7 +593,7 @@ bool state_background_write(SharedContext *context,
  last_change = false;

  while (!context->stop) {
-    beat_active = tempo_progress(&context->tempo, 1.0) < 0.25;
+    beat_active = tempo_progress(&context->tempo, 1.0) < 0.5;

    if (!midi->error && beat_active != last_active) {
      safe_midi_write(midi, state_config->tap_tempo_code,
@@ -327,12 +606,13 @@ bool state_background_write(SharedContext *context,

    last_active = beat_active;

-    change = tempo_progress(&context->tempo, 4.0) < 0.25;
+    change = tempo_progress(&context->tempo,
+                            (double)context->auto_random_cycle) < 0.5;

    if (context->auto_random && change && !last_change) {
-      state_randomize(context, state_config);
+      randomize(context, state_config);

-      state_apply(context, state_config, midi);
+      update_values(context, state_config, midi);
    }

    last_change = change;
@@ -342,59 +622,19 @@ bool state_background_write(SharedContext *context,
  return false;
 }

-static void state_load(SharedContext *context, const StateConfig *state_config,
-                       const char *state_file) {
-  ConfigFile saved_state;
-  char key[STR_LEN];
-
-  config_file_read(&saved_state, state_file);
-
-  tempo_set(&context->tempo,
-            config_file_get_int(&saved_state, "tempo", context->tempo.tempo));
-  context->page = config_file_get_int(&saved_state, "page", 0);
-  context->selected = config_file_get_int(&saved_state, "selected", 0);
-
-  for (unsigned int i = 0; i < context->state.length; i++) {
-    snprintf(key, STR_LEN, "seed_%d", i);
-    context->seeds[i] =
-        config_file_get_int(&saved_state, key, context->seeds[i]);
-    snprintf(key, STR_LEN, "state_%d", i);
-    context->state.values[i] = config_file_get_int(&saved_state, key, 0);
-  }
-
-  for (unsigned int i = 0; i < state_config->midi_active_counts.length; i++) {
-    snprintf(key, STR_LEN, "active_%d", i);
-    context->active[i] = config_file_get_int(&saved_state, key, 0);
-  }
-
-  for (unsigned int i = 0; i < state_config->value_count; i++) {
-    snprintf(key, STR_LEN, "value_%d_x", i);
-    context->values[i][0] =
-        (float)config_file_get_int(&saved_state, key, 0) / MIDI_MAX;
-    snprintf(key, STR_LEN, "value_%d_y", i);
-    context->values[i][1] =
-        (float)config_file_get_int(&saved_state, key, 0) / MIDI_MAX;
-    snprintf(key, STR_LEN, "value_%d_z", i);
-    context->values[i][2] =
-        (float)config_file_get_int(&saved_state, key, 0) / MIDI_MAX;
-  }
-
-  config_file_free(&saved_state);
-}
-
 void state_init(SharedContext *context, const StateConfig *state_config,
-                bool demo, bool auto_random, unsigned int base_tempo,
-                const char *state_file, bool load_state) {
-  tempo_init(&context->tempo);
-  tempo_set(&context->tempo, base_tempo);
+                bool demo, bool auto_random, unsigned int auto_random_cycles,
+                unsigned int base_tempo, bool load_state) {
+  tempo_init(&context->tempo, base_tempo);
  context->demo = demo;
  context->auto_random = auto_random;
+  context->auto_random_cycle = auto_random_cycles;

  context->state.length = state_config->select_frag_codes.length;
  memset(context->state.values, 0, sizeof(context->state.values));

  if (auto_random) {
-    state_randomize(context, state_config);
+    randomize(context, state_config);
  }

  memset(context->active, 0, sizeof(context->active));
@@ -410,77 +650,10 @@ void state_init(SharedContext *context, const StateConfig *state_config,
  }

  if (load_state) {
-    state_load(context, state_config, state_file);
+    load_from_default_file(context, state_config);
  }
 }

-void state_reset(SharedContext *context) {
-  memset(context->values, 0, sizeof(context->values));
-  memset(context->state.values, 0, sizeof(context->state.values));
-}
-
-void state_randomize(SharedContext *context, const StateConfig *state_config) {
-  unsigned int j;
-  unsigned int l;
-  unsigned int part;
-
-  for (unsigned int i = 0; i < state_config->midi_codes.length; i++) {
-    j = i / 3;
-    part = arr_uint_remap_index(state_config->midi_offsets, &j);
-    for (unsigned int k = 0; k < state_config->midi_active_counts.values[part];
-         k++) {
-      l = state_config->values_offsets.values[part] +
-          k * state_config->midi_counts.values[part] + j;
-
-      if (arr_uint_index_of(state_config->fader_codes,
-                            state_config->midi_codes.values[i]) !=
-          ARRAY_NOT_FOUND) {
-        context->values[l][i % 3] = (float)rand_uint(MIDI_MAX + 1) / MIDI_MAX;
-      } else {
-        context->values[l][i % 3] = rand_uint(2) == 1 ? 1 : 0;
-      }
-    }
-  }
-
-  for (unsigned int i = 0; i < context->state.length; i++) {
-    context->state.values[i] = rand_uint(state_config->state_max);
-  }
-}
-
-void state_save(const SharedContext *context, const StateConfig *state_config,
-                const char *state_file) {
-  StringArray lines;
-
-  log_info("Saving state to '%s'...", state_file);
-
-  lines.length = 0;
-
-  snprintf(lines.values[lines.length++], STR_LEN, "tempo=%d",
-           (unsigned int)context->tempo.tempo);
-  snprintf(lines.values[lines.length++], STR_LEN, "page=%d", context->page);
-  snprintf(lines.values[lines.length++], STR_LEN, "selected=%d",
-           context->selected);
-
-  for (unsigned int i = 0; i < context->state.length; i++) {
-    snprintf(lines.values[lines.length++], STR_LEN, "seed_%d=%d", i,
-             context->seeds[i]);
-    snprintf(lines.values[lines.length++], STR_LEN, "state_%d=%d", i,
-             context->state.values[i]);
-  }
-
-  for (unsigned int i = 0; i < state_config->midi_active_counts.length; i++) {
-    snprintf(lines.values[lines.length++], STR_LEN, "active_%d=%d", i,
-             context->active[i]);
-  }
-
-  for (unsigned int i = 0; i < state_config->value_count; i++) {
-    snprintf(lines.values[lines.length++], STR_LEN, "value_%d_x=%d", i,
-             (unsigned int)(context->values[i][0] * MIDI_MAX));
-    snprintf(lines.values[lines.length++], STR_LEN, "value_%d_y=%d", i,
-             (unsigned int)(context->values[i][1] * MIDI_MAX));
-    snprintf(lines.values[lines.length++], STR_LEN, "value_%d_z=%d", i,
-             (unsigned int)(context->values[i][2] * MIDI_MAX));
-  }
-
-  file_write(state_file, &lines);
+void state_save(const SharedContext *context, const StateConfig *state_config) {
+  save_to_default_file(context, state_config);
 }
@@ -5,26 +5,21 @@

 void state_parse_config(StateConfig *state_config, const ConfigFile *config);

-void state_apply_event(SharedContext *context, const StateConfig *state_config,
-                       const MidiDevice *midi, unsigned char code,
-                       unsigned char value, bool trace_midi);
+void state_midi_event(SharedContext *context, const StateConfig *state_config,
+                      const MidiDevice *midi, unsigned char code,
+                      unsigned char value, bool trace_midi);
+
+void state_key_event(SharedContext *context, const StateConfig *state_config,
+                     unsigned int code, const MidiDevice *midi);

 bool state_background_write(SharedContext *context,
                            const StateConfig *state_config,
                            const MidiDevice *midi);

 void state_init(SharedContext *context, const StateConfig *state_config,
-                bool demo, bool auto_random, unsigned int base_tempo,
-                const char *state_file, bool load_state);
+                bool demo, bool auto_random, unsigned int auto_random_cycles,
+                unsigned int base_tempo, bool load_state);

-void state_reset(SharedContext *context);
-
-void state_randomize(SharedContext *context, const StateConfig *state_config);
-
-void state_apply(const SharedContext *context, const StateConfig *state_config,
-                 const MidiDevice *midi);
-
-void state_save(const SharedContext *context, const StateConfig *state_config,
-                const char *state_file);
+void state_save(const SharedContext *context, const StateConfig *state_config);

 #endif /* STATE_H */
@@ -6,6 +6,8 @@
 #include "config.h"
 #include "string.h"

+static bool is_digit(char c) { return c >= '0' && c <= '9'; }
+
 unsigned int string_trim(char *str) {
  // https://www.delftstack.com/howto/c/trim-string-in-c/
  unsigned int start;
@@ -37,8 +39,6 @@ unsigned int string_trim(char *str) {
  return end - start + 1;
 }

-static bool is_digit(char c) { return c >= '0' && c <= '9'; }
-
 bool string_is_number(const char *value) {
  unsigned long value_len;

@@ -59,7 +59,8 @@ bool string_is_number(const char *value) {

 char *string_replace_at(const char *src, unsigned int from, unsigned int to,
                        const char *rpl) {
-  unsigned long src_len, rpl_len;
+  unsigned long src_len;
+  unsigned long rpl_len;
  char *dst;

  src_len = strnlen(src, STR_LEN * STR_LEN);
@@ -25,14 +25,6 @@ static void reset_tap_chain(Tempo *tempo, long t) {
  memset(tempo->tap_durations, 0, sizeof(tempo->tap_durations));
 }

-void tempo_init(Tempo *tempo) {
-  long t;
-
-  t = now();
-
-  reset_tap_chain(tempo, t);
-}
-
 static bool is_chain_active(const Tempo tempo, long t) {
  return (tempo.last_tap + MAX_BEAT_LENGTH) > t &&
         (tempo.last_tap + (tempo.beat_length * BEATS_UNTIL_CHAIN_RESET)) > t;
@@ -98,11 +90,31 @@ static void add_tap_to_chain(Tempo *tempo, long t) {
  tempo->tempo = 60000.0 / tempo->beat_length;
 }

-void tempo_set(Tempo *tempo, float value) {
+void tempo_init(Tempo *tempo, float value) {
+  long t;
+
+  t = now();
+
+  reset_tap_chain(tempo, t);
+
  tempo->tempo = value;
  tempo->beat_length = 60000.0 / value;
 }

+void tempo_set(Tempo *tempo, float value) {
+  long t;
+  long progress;
+
+  t = now();
+
+  progress = (t - tempo->last_reset) % tempo->beat_length;
+
+  tempo->tempo = value;
+  tempo->beat_length = 60000.0 / value;
+
+  reset_tap_chain(tempo, t - progress);
+}
+
 void tempo_tap(Tempo *tempo) {
  long t;

@@ -3,7 +3,7 @@
 #ifndef TEMPO_H
 #define TEMPO_H

-void tempo_init(Tempo *tempo);
+void tempo_init(Tempo *tempo, float value);

 void tempo_tap(Tempo *tempo);

@@ -18,7 +18,8 @@ bool timer_inc(Timer *timer) {

 double timer_reset(Timer *timer) {
  struct timeval stop;
-  double secs, per_secs;
+  double secs;
+  double per_secs;

  gettimeofday(&stop, NULL);

@@ -1,10 +1,12 @@
 #include <GLFW/glfw3.h>
 #include <alsa/asoundlib.h>
+#ifdef VIDEO_IN
 #include <glad/egl.h>
+#include <linux/videodev2.h>
+#endif /* VIDEO_IN */
 #include <glad/gl.h>
 #include <hashmap.h>
 #include <linmath.h>
-#include <linux/videodev2.h>
 #include <stdbool.h>
 #include <sys/time.h>
 #include <time.h>
@@ -43,10 +45,10 @@ typedef struct Parameters {
  float base_tempo;
  bool demo;
  bool auto_random;
+  unsigned int auto_random_cycle;
  StringArray video_in;
  unsigned int video_size;
  unsigned int internal_size;
-  char state_file[STR_LEN];
  bool load_state;
  bool save_state;
  bool trace_midi;
@@ -102,8 +104,10 @@ typedef struct ShaderProgram {
  GLuint iinres_locations[ARRAY_SIZE];
  GLuint iinfmt_locations[ARRAY_SIZE];
  GLuint iinfps_locations[ARRAY_SIZE];
+  GLuint iinswap_locations[ARRAY_SIZE];
  GLuint idemo_locations[ARRAY_SIZE];
  GLuint iautorand_locations[ARRAY_SIZE];
+  GLuint iautorandcycle_locations[ARRAY_SIZE];
  GLuint iseed_locations[ARRAY_SIZE];
  GLuint istate_locations[ARRAY_SIZE];
  GLuint ipage_locations[ARRAY_SIZE];
@@ -124,7 +128,9 @@ typedef struct ShaderProgram {
  unsigned int active_count;

  unsigned int in_count;
+#ifdef VIDEO_IN
  EGLDisplay egl_display;
+#endif /* VIDEO_IN */
 } ShaderProgram;

 // video.c
@@ -132,15 +138,20 @@ typedef struct ShaderProgram {
 typedef struct VideoCapture {
  char name[STR_LEN];
  bool error;
+  bool with_swap;
  int fd;
  int exp_fd;
+  int exp_fd_swap;
  unsigned int width;
  unsigned int height;
  unsigned int pixelformat;
  unsigned int bytesperline;
-  bool output;
+#ifdef VIDEO_IN
  struct v4l2_buffer buf;
+  struct v4l2_buffer buf_swap;
  EGLImageKHR dma_image;
+  EGLImageKHR dma_image_swap;
+#endif /* VIDEO_IN */
 } VideoCapture;

 typedef ARRAY(VideoCaptureArray, VideoCapture);
@@ -166,13 +177,10 @@ typedef struct Tempo {

 typedef struct SharedContext {
  int fd;
-
  vec2 resolution;
  vec2 tex_resolution;
  vec2 input_resolutions[MAX_VIDEO];
-
  double time;
-  unsigned int fps;
  Tempo tempo;
  double tempo_total;
  UintArray state;
@@ -182,11 +190,12 @@ typedef struct SharedContext {
  vec3 values[ARRAY_SIZE];
  bool demo;
  bool auto_random;
+  unsigned int auto_random_cycle;
  unsigned int seeds[MAX_FRAG];
-  bool monitor;
-
+  unsigned int fps;
  unsigned int input_formats[MAX_VIDEO];
  unsigned int input_fps[MAX_VIDEO];
+  bool input_swap[MAX_VIDEO];
  bool stop;
 } SharedContext;

@@ -210,6 +219,20 @@ typedef struct StateConfig {
  unsigned int value_count;

  unsigned int tap_tempo_code;
+
+  char save_file_prefix[STR_LEN];
+
+  unsigned int hotkey_randomize;
+  unsigned int hotkey_reset;
+  unsigned int hotkey_demo;
+  unsigned int hotkey_autorand;
+  unsigned int hotkey_autorand_up;
+  unsigned int hotkey_autorand_down;
+  unsigned int hotkey_tempo_up;
+  unsigned int hotkey_tempo_down;
+
+  UintArray hotkey_load;
+  UintArray hotkey_save;
 } StateConfig;

 // timer.c
@@ -224,6 +247,7 @@ typedef struct Timer {

 typedef struct ConfigFile {
  struct hashmap *map;
+  bool error;
 } ConfigFile;

 typedef struct ConfigFileItem {
@@ -1,3 +1,5 @@
+#ifdef VIDEO_IN
+
 #include <bsd/string.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -15,6 +17,9 @@
 #include "timer.h"
 #include "video.h"

+static const unsigned int pixel_format = V4L2_PIX_FMT_YUYV;
+static const enum v4l2_buf_type buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
 static void ioctl_error(VideoCapture *video_capture, const char *operation,
                        const char *default_msg) {
  if (errno == EINVAL) {
@@ -70,9 +75,8 @@ static void open_device(VideoCapture *video_capture, const char *name) {
  strlcpy(video_capture->name, name, STR_LEN);
  video_capture->error = false;
  video_capture->fd = -1;
-  video_capture->exp_fd = -1;

-  video_capture->fd = open(name, O_RDWR);
+  video_capture->fd = open(name, O_RDWR | O_NONBLOCK);
  if (video_capture->fd == -1) {
    log_warn("(%s) Cannot open device", name);
    video_capture->error = true;
@@ -114,7 +118,7 @@ static bool get_available_sizes(VideoCapture *video_capture,

  index = 0;
  fmt_enum.index = index;
-  fmt_enum.pixel_format = V4L2_PIX_FMT_YUYV;
+  fmt_enum.pixel_format = pixel_format;

  found = false;
  video_capture->width = 0;
@@ -146,7 +150,7 @@ static bool get_available_sizes(VideoCapture *video_capture,

    memset(&fmt_enum, 0, sizeof(fmt_enum));
    fmt_enum.index = ++index;
-    fmt_enum.pixel_format = V4L2_PIX_FMT_YUYV;
+    fmt_enum.pixel_format = pixel_format;
  }

  if (video_capture->height == 0) {
@@ -161,26 +165,18 @@ static bool get_available_sizes(VideoCapture *video_capture,
 static bool set_format(VideoCapture *video_capture) {
  struct v4l2_format fmt;

-  video_capture->output = false;
-
  memset(&fmt, 0, sizeof(fmt));

-  fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+  fmt.type = buf_type;
  fmt.fmt.pix.width = video_capture->width;
  fmt.fmt.pix.height = video_capture->height;
-  fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
-  fmt.fmt.pix.field = V4L2_FIELD_ANY;
+  fmt.fmt.pix.pixelformat = pixel_format;
+  fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;

  if (ioctl(video_capture->fd, VIDIOC_S_FMT, &fmt) == -1) {
-    fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
-
-    video_capture->output = true;
-
-    if (ioctl(video_capture->fd, VIDIOC_S_FMT, &fmt) == -1) {
-      ioctl_error(video_capture, "VIDIOC_S_FMT",
-                  "Requested buffer type not supported");
-      return false;
-    }
+    ioctl_error(video_capture, "VIDIOC_S_FMT",
+                "Requested buffer type not supported");
+    return false;
  }

  video_capture->width = fmt.fmt.pix.width;
@@ -202,10 +198,9 @@ static bool request_buffers(VideoCapture *video_capture) {

  memset(&reqbuf, 0, sizeof(reqbuf));

-  reqbuf.type = video_capture->output ? V4L2_BUF_TYPE_VIDEO_OUTPUT
-                                      : V4L2_BUF_TYPE_VIDEO_CAPTURE;
+  reqbuf.type = buf_type;
  reqbuf.memory = V4L2_MEMORY_MMAP;
-  reqbuf.count = 1;
+  reqbuf.count = 2;

  if (ioctl(video_capture->fd, VIDIOC_REQBUFS, &reqbuf) == -1) {
    ioctl_error(video_capture, "VIDIOC_REQBUFS",
@@ -215,19 +210,21 @@ static bool request_buffers(VideoCapture *video_capture) {

  log_info("(%s) V4L2 Buffer Count:  %d", video_capture->name, reqbuf.count);

+  video_capture->with_swap = reqbuf.count > 1;
+
  return true;
 }

-static bool export_buffer(VideoCapture *video_capture) {
+static bool export_buffer(VideoCapture *video_capture, int *fd,
+                          unsigned int index) {
  struct v4l2_exportbuffer expbuf;

-  video_capture->exp_fd = -1;
+  *fd = -1;

  memset(&expbuf, 0, sizeof(expbuf));

-  expbuf.type = video_capture->output ? V4L2_BUF_TYPE_VIDEO_OUTPUT
-                                      : V4L2_BUF_TYPE_VIDEO_CAPTURE;
-  expbuf.index = 0;
+  expbuf.type = buf_type;
+  expbuf.index = index;
  expbuf.flags = O_RDONLY;

  if (ioctl(video_capture->fd, VIDIOC_EXPBUF, &expbuf) == -1) {
@@ -237,12 +234,23 @@ static bool export_buffer(VideoCapture *video_capture) {
    return false;
  }

-  video_capture->exp_fd = expbuf.fd;
+  *fd = expbuf.fd;

  return true;
 }

-static const enum v4l2_buf_type buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+static bool export_buffers(VideoCapture *video_capture) {
+  bool result;
+
+  result = export_buffer(video_capture, &video_capture->exp_fd, 0);
+
+  if (result && video_capture->with_swap) {
+    result =
+        result && export_buffer(video_capture, &video_capture->exp_fd_swap, 1);
+  }
+
+  return result;
+}

 static bool open_stream(VideoCapture *video_capture) {
  if (ioctl(video_capture->fd, VIDIOC_STREAMON, &buf_type) == -1) {
@@ -255,21 +263,50 @@ static bool open_stream(VideoCapture *video_capture) {
  return true;
 }

-static void create_image_buffer(VideoCapture *video_capture) {
-  memset(&video_capture->buf, 0, sizeof(video_capture->buf));
+static void create_image_buffer(const VideoCapture *video_capture,
+                                struct v4l2_buffer *buf, unsigned int index) {
+  memset(buf, 0, sizeof(*buf));

-  video_capture->buf.type = video_capture->output ? V4L2_BUF_TYPE_VIDEO_OUTPUT
-                                                  : V4L2_BUF_TYPE_VIDEO_CAPTURE;
-  video_capture->buf.memory = V4L2_MEMORY_MMAP;
-  video_capture->buf.index = 0;
+  buf->type = buf_type;
+  buf->memory = V4L2_MEMORY_MMAP;
+  buf->index = index;

-  ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf);
+  ioctl(video_capture->fd, VIDIOC_QBUF, buf);
+}
+
+static void create_image_buffers(VideoCapture *video_capture) {
+  create_image_buffer(video_capture, &video_capture->buf, 0);
+
+  if (video_capture->with_swap) {
+    create_image_buffer(video_capture, &video_capture->buf_swap, 1);
+  }
 }

 static void close_stream(const VideoCapture *video_capture) {
  ioctl(video_capture->fd, VIDIOC_STREAMOFF, &buf_type);
 }

+static unsigned int read_video(const VideoCapture *video_capture, bool swap) {
+  int result;
+
+  result = 0;
+
+  if ((swap || !video_capture->with_swap) &&
+      ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf) != -1) {
+    ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf);
+
+    result = 1;
+  } else if (!swap && video_capture->with_swap &&
+             ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf_swap) !=
+                 -1) {
+    ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf_swap);
+
+    result = 2;
+  }
+
+  return result;
+}
+
 void video_init(VideoCapture *video_capture, const char *name,
                unsigned int preferred_height) {
  open_device(video_capture, name);
@@ -294,7 +331,7 @@ void video_init(VideoCapture *video_capture, const char *name,
    return;
  }

-  if (!export_buffer(video_capture)) {
+  if (!export_buffers(video_capture)) {
    return;
  }

@@ -302,25 +339,7 @@ void video_init(VideoCapture *video_capture, const char *name,
    return;
  }

-  create_image_buffer(video_capture);
-}
-
-static bool read_video(VideoCapture *video_capture) {
-  if (ioctl(video_capture->fd, VIDIOC_DQBUF, &video_capture->buf) == -1) {
-    ioctl_error(video_capture, "VIDIOC_DQBUF",
-                "buffer type not supported or no buffer allocated or the index "
-                "is out of bounds");
-    return false;
-  }
-
-  if (ioctl(video_capture->fd, VIDIOC_QBUF, &video_capture->buf) == -1) {
-    ioctl_error(video_capture, "VIDIOC_QBUF",
-                "buffer type not supported or no buffer allocated or the index "
-                "is out of bounds");
-    return false;
-  }
-
-  return true;
+  create_image_buffers(video_capture);
 }

 bool video_background_read(VideoCapture *video_capture, SharedContext *context,
@@ -328,6 +347,7 @@ bool video_background_read(VideoCapture *video_capture, SharedContext *context,
  pid_t pid;
  Timer timer;
  double fps;
+  unsigned int video_result;

  pid = fork();
  if (pid < 0) {
@@ -341,9 +361,9 @@ bool video_background_read(VideoCapture *video_capture, SharedContext *context,
           pid);
  timer_init(&timer, 30);

-  while (!context->stop && read_video(video_capture)) {
-    // repeat infinitely
-    if (timer_inc(&timer)) {
+  while (!context->stop) {
+    video_result = read_video(video_capture, context->input_swap[input_index]);
+    if (video_result > 0 && timer_inc(&timer)) {
      fps = timer_reset(&timer);

      context->input_fps[input_index] = (unsigned int)round(fps);
@@ -351,6 +371,9 @@ bool video_background_read(VideoCapture *video_capture, SharedContext *context,
        log_trace("(%s) %.2ffps", video_capture->name, fps);
      }
    }
+    if (video_result > 0) {
+      context->input_swap[input_index] = video_result == 2;
+    }
  }
  if (context->stop) {
    log_info("(%s) background acquisition stopped by main thread (pid: %d)",
@@ -370,7 +393,12 @@ void video_free(const VideoCapture *video_capture) {
  if (video_capture->exp_fd != -1) {
    close(video_capture->exp_fd);
  }
+  if (video_capture->exp_fd_swap != -1) {
+    close(video_capture->exp_fd);
+  }
  if (video_capture->fd != -1) {
    close(video_capture->fd);
  }
-}
+}
+
+#endif /* VIDEO_IN */
@@ -121,7 +121,8 @@ void window_events() { glfwPollEvents(); }
 double window_get_time() { return glfwGetTime(); }

 void window_use(Window *window, SharedContext *context) {
-  int width, height;
+  int width;
+  int height;

  glfwMakeContextCurrent(window);
  glfwGetFramebufferSize(window, &width, &height);
@@ -145,6 +146,23 @@ bool window_escape_key(int key, int action) {
  return key == GLFW_KEY_ESCAPE && action == GLFW_PRESS;
 }

-bool window_char_key(int key, int action, const int char_code) {
-  return key == char_code && action == GLFW_PRESS;
+unsigned int window_read_key(int key, int action, int mods) {
+  unsigned int result;
+  if (action == GLFW_RELEASE || key == GLFW_KEY_LEFT_SHIFT ||
+      key == GLFW_KEY_RIGHT_SHIFT || key == GLFW_KEY_LEFT_CONTROL ||
+      key == GLFW_KEY_RIGHT_CONTROL || key == GLFW_KEY_LEFT_ALT ||
+      key == GLFW_KEY_RIGHT_ALT) {
+    return 0;
+  }
+  result = key;
+  if ((mods & GLFW_MOD_SHIFT) > 0) {
+    result += 1000;
+  }
+  if ((mods & GLFW_MOD_CONTROL) > 0) {
+    result += 10000;
+  }
+  if ((mods & GLFW_MOD_ALT) > 0) {
+    result += 100000;
+  }
+  return result;
 }
@@ -27,6 +27,6 @@ bool window_should_close(Window *window);

 bool window_escape_key(int key, int action);

-bool window_char_key(int key, int action, const int char_code);
+unsigned int window_read_key(int key, int action, int mods);

 #endif /* WINDOW_H */
Author	SHA1	Message	Date
klemek	97f768f65e	fix(video): alternate read for double buffering	2025-11-24 19:11:59 +01:00
klemek	c66a5c166e	feat: double buffered video input	2025-11-24 18:52:44 +01:00
klemek	aa42e9d2aa	docs: README update	2025-11-24 00:28:59 +01:00
klemek	3dceb044aa	build: check build no video	2025-11-24 00:28:30 +01:00
klemek	d19f5d2d81	fix(video): slightly faster video	2025-11-23 19:11:08 +01:00
klemek	1bf0bfc558	fix(build): remove video args if no video	2025-11-23 19:10:57 +01:00
klemek	06544ee23e	refactor: more maintainability	2025-11-23 15:55:43 +01:00
klemek	1f5f502905	ci(sonar): add properties file	2025-11-23 15:39:17 +01:00
klemek	7120bc0207	refactor: clean unused variables	2025-11-23 15:36:21 +01:00
klemek	c7ae4191d3	fix(video): better fps for interlaced	2025-11-23 15:04:21 +01:00
klemek	85349598c3	fix(default): debug screen fix	2025-11-23 15:04:10 +01:00
klemek	2f83bbb21e	style: identifiers separation	2025-11-23 13:06:40 +01:00
klemek	6b4630f255	feat(video): slightly faster video acquisition with O_NONBLOCK	2025-11-23 12:58:49 +01:00
klemek	01266e7823	feat(video): can build without video	2025-11-23 00:45:54 +01:00
klemek	d9074c366e	fix(args): vi for video-in	2025-11-23 00:27:05 +01:00
klemek	81c7471226	docs: update todo	2025-11-17 14:07:01 +01:00
klemek	31800e3392	fix: better mix value	2025-11-17 14:06:46 +01:00
klemek	69e34b499c	refactor: clearer monitor screen	2025-11-17 14:01:34 +01:00
klemek	8a14ad52bf	feat: replace src 4 with circuit	2025-11-17 12:14:00 +01:00
klemek	0fe3b067cb	refactor: debug improvements	2025-11-17 12:13:49 +01:00
klemek	e1219c316c	docs: update tiodo list	2025-11-17 12:13:09 +01:00
klemek	2692bb0f9b	refactor: move static function on top of files	2025-11-14 11:52:47 +01:00
klemek	d094a6c895	feat: hotkeys in config	2025-11-14 11:49:02 +01:00
klemek	4ddb5241b4	feat: load/save state from number hotkeys	2025-11-14 11:02:21 +01:00
klemek	f04fe1f5c1	refactor: staticify state local functions	2025-11-14 10:34:43 +01:00
klemek	f0c5ecab16	feat: arrow keys to control bpm/cycle	2025-11-14 10:20:55 +01:00
klemek	7739ac8254	refactor: state read event struct	2025-11-14 09:37:29 +01:00
klemek	c229b9bc68	feat: --auto-random-cycle	2025-11-14 09:03:23 +01:00
klemek	2ab0947550	fix: don't black out screen in demo	2025-11-13 19:32:48 +01:00
klemek	116ccb0e84	docs: update schema	2025-11-13 09:06:20 +01:00
klemek	ce156e4acf	docs: add shields.io badges	2025-11-13 00:14:27 +01:00
klemek	fcd829e79f	forge (steel) v1.0.1	2025-11-12 23:41:47 +01:00
klemek	a3d9baf18c	fix: iDemo redundant with autorandom	2025-11-12 23:41:09 +01:00
klemek	3903149549	build: fix clean-release	2025-11-12 23:40:41 +01:00
klemek	4d984d1e28	docs: update README and DEVELOPMENT	2025-11-12 23:31:55 +01:00