screensharing documentation (#7)

* screensharing documentation

* cleanup

* cleanup

* cleanup

* cleanup

.gitignore

@@ -1,6 +1,7 @@
 venv
 
 *.mp4
+*.webm
 
 .direnv
 .envrc

CMakeLists.txt

@@ -4,9 +4,9 @@ project(hyperwall)
 set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
 set(PROJECT_IMPLEMENTATIONS
-    src/FFmpeg.cpp
-    src/Sources.cpp
-    src/Hyperwall.cpp
+    src/impl/FFmpeg.cpp
+    src/impl/Sources.cpp
+    src/impl/Hyperwall.cpp
 )
 set(CMAKE_CXX_FLAGS "-O3")
 
@@ -31,3 +31,4 @@ target_link_libraries(sender
     ${OpenCV_LIBS}
     argparse
 )
+

README.md

@@ -19,5 +19,15 @@ cmake --build build -j4
 ```sh
 ./build/sender <args>
 # in another shell
-./scripts/tmux-ffplay.sh
+./scripts/tmux-ffplay.sh <ip addr>
+```
+
+### Screensharing
+screensharing is at the moment an exercise in setting up a tcp stream yourself. in a shell do something like:
+```sh
+ffmpeg -f x11grab -i :0 -vcodec libx264 -f mpegts tcp://127.0.0.1:8600
+```
+then in another shell, start the hyperwall:
+```sh
+./build/sender --file "tcp://127.0.0.1:8600?listen" ... <args>
 ```

flake.nix

@@ -13,6 +13,7 @@
       packages = with pkgs; [
         opencv
         ffmpeg
+        cmake
       ];
     };
   };

scripts/tmux-ffplay.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
-for ((x=0;x<$1;x++)); do
-  for ((y=0;y<$2;y++)); do
-    tmux new-session -d ffplay rtsp://localhost:8554/frame/$x/$y
+for ((x=0;x<$2;x++)); do
+  for ((y=0;y<$3;y++)); do
+    tmux new-session -d ffplay rtsp://$1:8554/frame/$x/$y
   done
 done

src/FFmpeg.cpp → src/impl/FFmpeg.cpp

@@ -1,7 +1,7 @@
 #include "FFmpeg.hpp"
 #include <cstdio>
 #include <format>
-#include <opencv2/core/mat.hpp>
+#include <opencv2/opencv.hpp>
 #include <sstream>
 #include <string>
 
@@ -41,3 +41,4 @@ const void Hyperwall::FFmpeg::write(const cv::Mat& mat) const {
   fwrite(mat.data, 1, mat.cols * mat.rows * 3, buffer);
   fflush(buffer);
 }
+