webcam

sechshelme · Aug 5, 2023 · d493d46 · d493d46
1 parent 8ebb670
commit d493d46
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Showing 8 changed files with 274 additions and 123 deletions.
diff --git a/Webcam/Webcam-SDL2-master/Lazarus/project1.lpr b/Webcam/Webcam-SDL2-master/Lazarus/project1.lpr
@@ -11,39 +11,22 @@
 
 const
   device = '/dev/video0';
-  IMAGE_WIDTH = 640;
-  IMAGE_HEIGHT = 480;
 
 
-type
-  TFramehandler = procedure(pframe: Pointer; len: cint);
-
-  TStreamHandle = record
-    fd: cint;
-    framehandler: TFramehandler;
-  end;
-
 var
   video_fildes: longint;
-  sH: TStreamHandle;
 
   sdlTexture: PSDL_Texture;
   sdlRenderer: PSDL_Renderer;
   sdlRect: TSDL_Rect;
   sdlScreen: PSDL_Window;
+  e: TSDL_Event;
+
   quit: boolean = False;
   fds: TFDSet;
 
   tv: TTimeVal = (tv_sec: 1; tv_usec: 0);
-  buf:Tv4l2_buffer;
-
-  procedure frame_handler(pframe: Pointer; len: cint);
-  begin
-    SDL_UpdateTexture(sdlTexture, @sdlRect, pframe, IMAGE_WIDTH * 2);
-    SDL_RenderClear(sdlRenderer);
-    SDL_RenderCopy(sdlRenderer, sdlTexture, nil, @sdlRect);
-    SDL_RenderPresent(sdlRenderer);
-  end;
+  buf: Tv4l2_buffer;
 
 begin
   video_fildes := v4l2_open(device);
@@ -57,7 +40,7 @@   TStreamHandle = record
     Halt(1);
   end;
 
-  if v4l2_sfmt(video_fildes, 1448695129) = -1 then begin     // ??????
+  if v4l2_sfmt(video_fildes, V4L2_PIX_FMT_YUYV) = -1 then begin
     WriteLn('v4l2_sfmt');
     Halt(1);
   end;
@@ -67,7 +50,7 @@   TStreamHandle = record
     Halt(1);
   end;
 
-  if v4l2_sfmt(video_fildes, 30) = -1 then begin
+  if v4l2_sfps(video_fildes, 30) = -1 then begin
     WriteLn('v4l2_sfmt()');
     Halt(1);
   end;
@@ -82,12 +65,9 @@   TStreamHandle = record
     Halt(1);
   end;
 
-  sH.fd := video_fildes;
-  sH.framehandler := @frame_handler;
-
   SDL_Init(SDL_INIT_VIDEO or SDL_INIT_TIMER);
 
-  sdlScreen := SDL_CreateWindow('webcam', SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN);
+  sdlScreen := SDL_CreateWindow('webcam', SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, IMAGE_WIDTH, IMAGE_HEIGHT, SDL_WINDOW_SHOWN);
   if sdlScreen = nil then begin
     WriteLn('Kann SDL nicht öffnen');
   end;
@@ -97,37 +77,52 @@   TStreamHandle = record
     Write('Kann Renderer nicht öffnen');
   end;
 
-  sdlTexture := SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_YUY2, SDL_TEXTUREACCESS_STREAMING, 640, 480);
-
-  sdlRect.w := 640;
-  sdlRect.h := 480;
-
-//  #define VIDIOC_QBUF		_IOWR('V', 15, struct v4l2_buffer)
-//  #define VIDIOC_EXPBUF		_IOWR('V', 16, struct v4l2_exportbuffer)
-//  #define VIDIOC_DQBUF		_IOWR('V', 17, struct v4l2_buffer)
+  sdlTexture := SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_YUY2, SDL_TEXTUREACCESS_STREAMING, IMAGE_WIDTH, IMAGE_HEIGHT);
 
+  sdlRect.w := IMAGE_WIDTH;
+  sdlRect.h := IMAGE_HEIGHT;
 
   repeat
     fpFD_ZERO(fds);
     fpFD_SET(video_fildes, fds);
 
     fpSelect(video_fildes + 1, @fds, nil, nil, @tv);
 
-    buf._type:=V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    buf.memory:=V4L2_MEMORY_MMAP;
+    buf._type := V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    buf.memory := V4L2_MEMORY_MMAP;
     FpIOCtl(video_fildes, VIDIOC_DQBUF, @buf);
 
-    buf._type:=V4L2_BUF_TYPE_VIDEO_CAPTURE;
-    buf.memory:=V4L2_MEMORY_MMAP;
+    buf._type := V4L2_BUF_TYPE_VIDEO_CAPTURE;
+    buf.memory := V4L2_MEMORY_MMAP;
     FpIOCtl(video_fildes, VIDIOC_QBUF, @buf);
 
-    //////////////77
-
-
+    while SDL_PollEvent(@e) <> 0 do begin
+      case e.type_ of
+        SDL_KEYDOWN: begin
+          case e.key.keysym.sym of
+            SDLK_ESCAPE: begin
+              quit := True;
+            end;
+          end;
+        end;
+        SDL_QUITEV: begin
+          quit := True;
+        end;
+      end;
+    end;
+
+    SDL_UpdateTexture(sdlTexture, @sdlRect, v4l2_ubuffers[buf.index].start, IMAGE_WIDTH * 2);
+    //  SDL_UpdateYUVTexture
+    SDL_RenderClear(sdlRenderer);
+    SDL_RenderCopy(sdlRenderer, sdlTexture, nil, @sdlRect);
+    SDL_RenderPresent(sdlRenderer);
   until quit;
 
+  v4l2_streamoff(video_fildes);
+  v4l2_munmap;
+    v4l2_close(video_fildes);
 
+    SDL_Quit();
 
-
-  WriteLn('io.');
+  WriteLn('ende.');
 end.
diff --git a/Webcam/Webcam-SDL2-master/Lazarus/v4l2_driver.pas b/Webcam/Webcam-SDL2-master/Lazarus/v4l2_driver.pas
@@ -20,6 +20,16 @@ interface
   IMAGE_HEIGHT: longint; cvar;external;
 
   // ---- von /usr/include/linux/videodev2.h
+const
+  //  #define VIDIOC_QBUF    _IOWR('V', 15, struct v4l2_buffer)
+  //  #define VIDIOC_EXPBUF    _IOWR('V', 16, struct v4l2_exportbuffer)
+  //  #define VIDIOC_DQBUF    _IOWR('V', 17, struct v4l2_buffer)
+
+
+  VIDIOC_DQBUF = 3227014673;
+  VIDIOC_QBUF = 3227014671;
+  V4L2_PIX_FMT_YUYV = 1448695129;
+
 
 const
   V4L2_BUF_TYPE_VIDEO_CAPTURE = 1;
@@ -111,11 +121,9 @@   Tv4l2_ubuffer = record
   v4l2_ubuffers: Pv4l2_ubuffer; cvar;external;
 
   { functions  }
-  (* Const before type ignored *)
 
 function v4l2_open(device: PChar): longint; cdecl; external;
 function v4l2_close(fd: longint): longint; cdecl; external;
-(* Const before type ignored *)
 function v4l2_querycap(fd: longint; device: PChar): longint; cdecl; external;
 function v4l2_sfmt(fd: longint; pfmt: uint32): longint; cdecl; external;
 function v4l2_gfmt(fd: longint): longint; cdecl; external;
@@ -124,9 +132,7 @@ function v4l2_munmap: longint; cdecl; external;
 function v4l2_sfps(fd: longint; fps: longint): longint; cdecl; external;
 function v4l2_streamon(fd: longint): longint; cdecl; external;
 function v4l2_streamoff(fd: longint): longint; cdecl; external;
-//{$endif}
 
 implementation
 
-
 end.
diff --git a/Webcam/Webcam-SDL2-master/src/main.c b/Webcam/Webcam-SDL2-master/src/main.c
@@ -19,39 +19,40 @@ SDL_Rect sdlRect;
 
 int video_fildes;
 
-static void *v4l2_streaming() {
+void v4l2_streaming() {
   // SDL2 begins
   memset(&sdlRect, 0, sizeof(sdlRect));
   if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER)) {
     printf("Could not initialize SDL - %s\n", SDL_GetError());
-    return NULL;
+    exit(1);
   }
 
   sdlScreen = SDL_CreateWindow("Simple YUV Window", SDL_WINDOWPOS_UNDEFINED,
                                SDL_WINDOWPOS_UNDEFINED, IMAGE_WIDTH,
                                IMAGE_HEIGHT, SDL_WINDOW_SHOWN);
 
   if (!sdlScreen) {
-    fprintf(stderr, "SDL: could not create window - exiting:%s\n",
-            SDL_GetError());
-    return NULL;
+    fprintf(stderr, "SDL: could not create window - exiting:%s\n", SDL_GetError());
+    exit(1);
   }
 
   sdlRenderer = SDL_CreateRenderer(
       sdlScreen, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
   if (sdlRenderer == NULL) {
     fprintf(stderr, "SDL_CreateRenderer Error\n");
-    return NULL;
+    exit(1);
   }
-  sdlTexture =
-      SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_YUY2,
-                        SDL_TEXTUREACCESS_STREAMING, IMAGE_WIDTH, IMAGE_HEIGHT);
+
+  sdlTexture = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_YUY2, SDL_TEXTUREACCESS_STREAMING, IMAGE_WIDTH, IMAGE_HEIGHT);
   sdlRect.w = IMAGE_WIDTH;
   sdlRect.h = IMAGE_HEIGHT;
 
   fd_set fds;
   struct v4l2_buffer buf;
 
+printf("VIDIOC_DQBUF: %lu\n", VIDIOC_DQBUF);
+printf("VIDIOC_QBUF: %lu\n", VIDIOC_QBUF);
+
   while (1) {
     FD_ZERO(&fds);
     FD_SET(video_fildes, &fds);
@@ -92,7 +93,9 @@ int main(int argc, char const *argv[]) {
     goto exit_;
   }
 
-printf("----- %d\n", V4L2_PIX_FMT_YUYV);
+printf("V4L2_PIX_FMT_YUYV: %d\n", V4L2_PIX_FMT_YUYV);
+printf("width  : %d\n", IMAGE_WIDTH);
+printf("height : %d\n", IMAGE_HEIGHT);
 
   // most of devices support YUYV422 packed.
   if (v4l2_sfmt(video_fildes, V4L2_PIX_FMT_YUYV) == -1) {

diff --git a/Webcam/Webcam-SDL2-master/src/simple_cam b/Webcam/Webcam-SDL2-master/src/simple_cam
diff --git a/codeblocks/Texturen/main.c b/codeblocks/Texturen/main.c