fixed some stuff for linux build...

now its getting close to the look of the windows build...
YAY ! 

see http://www.flickr.com/photos/31428768@N00/sets/72157602234125005/

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@468 b956fd51-792f-4845-bead-9b4dfca2ff2c

1 files changed, 462 insertions, 404 deletions

diff --git a/Game/Code/Classes/UVideo.pas b/Game/Code/Classes/UVideo.pas
index 290db271..b2ba01dc 100644
--- a/Game/Code/Classes/UVideo.pas
+++ b/Game/Code/Classes/UVideo.pas
@@ -1,404 +1,462 @@
-{############################################################################

-#                   FFmpeg support for UltraStar deluxe                     #

-#                                                                           #

-#   Created by b1indy                                                       #

-#   based on 'An ffmpeg and SDL Tutorial' (http://www.dranger.com/ffmpeg/)  #

-#############################################################################}

-

-//{$define DebugDisplay}  // uncomment if u want to see the debug stuff

-//{$define DebugFrames}

-//{$define Info}

-

-

-unit UVideo;

-

-interface

-

-{$IFDEF FPC}

-  {$MODE DELPHI}

-{$ENDIF}

-

-

-uses SDL,

-     UGraphicClasses,

-     textgl,

-     avcodec,

-     avformat,

-     avutil,

-     math,

-     OpenGL12,

-     SysUtils,

-     {$ifdef DebugDisplay}

-     dialogs,

-     {$ENDIF}

-     UIni;

-

-procedure Init;

-procedure FFmpegOpenFile(FileName: pAnsiChar);

-procedure FFmpegClose;

-procedure FFmpegGetFrame(Time: Extended);

-procedure FFmpegDrawGL(Screen: integer);

-procedure FFmpegTogglePause;

-procedure FFmpegSkip(Time: Single);

-

-var

-  VideoOpened, VideoPaused: Boolean;

-  VideoFormatContext: PAVFormatContext;

-  VideoStreamIndex: Integer;

-  VideoCodecContext: PAVCodecContext;

-  VideoCodec: PAVCodec;

-  AVFrame: PAVFrame;

-  AVFrameRGB: PAVFrame;

-  myBuffer: pByte;

-  VideoTex: glUint;

-  TexX, TexY, dataX, dataY: Cardinal;

-  TexData: array of Byte;

-  ScaledVideoWidth, ScaledVideoHeight: Real;

-  VideoAspect: Real;

-  VideoTextureU, VideoTextureV: Real;

-  VideoTimeBase, VideoTime, LastFrameTime, TimeDifference: Extended;

-  VideoSkipTime: Single;

-

-implementation

-

-procedure Init;

-begin

-  av_register_all;

-  VideoOpened:=False;

-  VideoPaused:=False;

-  glGenTextures(1, PglUint(@VideoTex));

-  SetLength(TexData,0);

-end;

-

-procedure FFmpegOpenFile(FileName: pAnsiChar);

-var errnum, i, x,y: Integer;

-begin

-  VideoOpened:=False;

-  VideoPaused:=False;

-  VideoTimeBase:=0;

-  VideoTime:=0;

-  LastFrameTime:=0;

-  TimeDifference:=0;

-  errnum:=av_open_input_file(VideoFormatContext, FileName, Nil, 0, Nil);

-  if(errnum <> 0)

-  then begin

-{$ifdef DebugDisplay}

-    case errnum of

-      AVERROR_UNKNOWN: showmessage('failed to open file '+Filename+#13#10+'AVERROR_UNKNOWN');

-      AVERROR_IO: showmessage('failed to open file '+Filename+#13#10+'AVERROR_IO');

-      AVERROR_NUMEXPECTED: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NUMEXPECTED');

-      AVERROR_INVALIDDATA: showmessage('failed to open file '+Filename+#13#10+'AVERROR_INVALIDDATA');

-      AVERROR_NOMEM: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOMEM');

-      AVERROR_NOFMT: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOFMT');

-      AVERROR_NOTSUPP: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOTSUPP');

-    else showmessage('failed to open file '+Filename+#13#10+'Error number: '+inttostr(Errnum));

-    end;

-{$ENDIF}

-    Exit;

-  end

-  else begin

-    VideoStreamIndex:=-1;

-    if(av_find_stream_info(VideoFormatContext)>=0) then

-    begin

-      for i:=0 to VideoFormatContext^.nb_streams-1 do

-        if(VideoFormatContext^.streams[i]^.codec^.codec_type=CODEC_TYPE_VIDEO) then begin

-          VideoStreamIndex:=i;

-        end else

-    end;

-    if(VideoStreamIndex >= 0) then

-    begin

-      VideoCodecContext:=VideoFormatContext^.streams[VideoStreamIndex]^.codec;

-      VideoCodec:=avcodec_find_decoder(VideoCodecContext^.codec_id);

-    end else begin

-{$ifdef DebugDisplay}

-      showmessage('found no video stream');

-{$ENDIF}

-      av_close_input_file(VideoFormatContext);

-      Exit;

-    end;

-    if(VideoCodec<>Nil) then

-    begin

-      errnum:=avcodec_open(VideoCodecContext, VideoCodec);

-    end else begin

-{$ifdef DebugDisplay}

-      showmessage('no matching codec found');

-{$ENDIF}

-      avcodec_close(VideoCodecContext);

-      av_close_input_file(VideoFormatContext);

-      Exit;

-    end;

-    if(errnum >=0) then

-    begin

-{$ifdef DebugDisplay}

-       showmessage('Found a matching Codec:'+#13#10#13#10+

-        'Width='+inttostr(VideoCodecContext^.width)+

-        ', Height='+inttostr(VideoCodecContext^.height)+#13#10+

-        'Aspect: '+inttostr(VideoCodecContext^.sample_aspect_ratio.num)+'/'+inttostr(VideoCodecContext^.sample_aspect_ratio.den)+#13#10+

-        'Framerate: '+inttostr(VideoCodecContext^.time_base.num)+'/'+inttostr(VideoCodecContext^.time_base.den));

-{$endif}

-      // allocate space for decoded frame and rgb frame

-      AVFrame:=avcodec_alloc_frame;

-      AVFrameRGB:=avcodec_alloc_frame;

-    end;

-    myBuffer:=Nil;

-    if(AVFrame <> Nil) and (AVFrameRGB <> Nil) then

-    begin

-      myBuffer:=av_malloc(avpicture_get_size(PIX_FMT_RGB24, VideoCodecContext^.width,

-                            VideoCodecContext^.height));

-    end;

-    if myBuffer <> Nil then errnum:=avpicture_fill(PAVPicture(AVFrameRGB), myBuffer, PIX_FMT_RGB24,

-                VideoCodecContext^.width, VideoCodecContext^.height)

-    else begin

-{$ifdef DebugDisplay}

-      showmessage('failed to allocate video buffer');

-{$endif}

-      av_free(AVFrameRGB);

-      av_free(AVFrame);

-      avcodec_close(VideoCodecContext);

-      av_close_input_file(VideoFormatContext);

-      Exit;

-    end;

-    if errnum >=0 then

-    begin

-      VideoOpened:=True;

-

-      TexX := VideoCodecContext^.width;

-      TexY := VideoCodecContext^.height;

-      dataX := Round(Power(2, Ceil(Log2(TexX))));

-      dataY := Round(Power(2, Ceil(Log2(TexY))));

-      SetLength(TexData,dataX*dataY*3);

-      // calculate some information for video display

-      VideoAspect:=VideoCodecContext^.sample_aspect_ratio.num/VideoCodecContext^.sample_aspect_ratio.den;

-      if (VideoAspect = 0) then

-        VideoAspect:=VideoCodecContext^.width/VideoCodecContext^.height

-      else

-        VideoAspect:=VideoAspect*VideoCodecContext^.width/VideoCodecContext^.height;

-      if VideoAspect >= 4/3 then

-      begin

-        ScaledVideoWidth:=800.0;

-        ScaledVideoHeight:=800.0/VideoAspect;

-      end else

-      begin

-        ScaledVideoHeight:=600.0;

-        ScaledVideoWidth:=600.0*VideoAspect;

-      end;

-      VideoTimeBase:=VideoCodecContext^.time_base.num/VideoCodecContext^.time_base.den;

-      // hack to get reasonable timebase for divx

-{$ifdef DebugDisplay}

-      showmessage('framerate: '+inttostr(floor(1/videotimebase))+'fps');

-{$endif}

-      if VideoTimeBase < 0.02 then // 0.02 <-> 50 fps

-      begin

-        VideoTimeBase:=VideoCodecContext^.time_base.den/VideoCodecContext^.time_base.num;

-        while VideoTimeBase > 50 do VideoTimeBase:=VideoTimeBase/10;

-        VideoTimeBase:=1/VideoTimeBase;

-      end;

-{$ifdef DebugDisplay}

-      showmessage('corrected framerate: '+inttostr(floor(1/videotimebase))+'fps');

-      if ((VideoAspect*VideoCodecContext^.width*VideoCodecContext^.height)>200000) then

-        showmessage('you are trying to play a rather large video'+#13#10+

-                    'be prepared to experience some timing problems');

-{$endif}

-    end;

-  end;

-end;

-

-procedure FFmpegClose;

-begin

-  if VideoOpened then begin

-    av_free(myBuffer);

-    av_free(AVFrameRGB);

-    av_free(AVFrame);

-    avcodec_close(VideoCodecContext);

-    av_close_input_file(VideoFormatContext);

-    SetLength(TexData,0);

-    VideoOpened:=False;

-  end;

-end;

-

-procedure FFmpegTogglePause;

-begin

-  if VideoPaused then VideoPaused:=False

-  else VideoPaused:=True;

-end;

-

-procedure FFmpegSkip(Time: Single);

-begin

-  VideoSkiptime:=Time;

-  if VideoSkipTime > 0 then begin

-    av_seek_frame(VideoFormatContext,-1,Floor((VideoSkipTime)*1500000),0);

-    VideoTime:=VideoSkipTime;

-  end;

-end;

-

-procedure FFmpegGetFrame(Time: Extended);

-var

-  FrameFinished: Integer;

-  AVPacket: TAVPacket;

-  errnum, x, y: Integer;

-  FrameDataPtr: PByteArray;

-  linesize: integer;

-  myTime: Extended;

-  DropFrame: Boolean;

-  droppedFrames: Integer;

-const

-  FRAMEDROPCOUNT=3;

-begin

-  if not VideoOpened then Exit;

-  if VideoPaused then Exit;

-  myTime:=Time+VideoSkipTime;

-  TimeDifference:=myTime-VideoTime;

-  DropFrame:=False;

-{  showmessage('Time:      '+inttostr(floor(Time*1000))+#13#10+

-    'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+

-    'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+

-    'TimeDiff:  '+inttostr(floor(TimeDifference*1000)));

-}

-  if (VideoTime <> 0) and (TimeDifference <= VideoTimeBase) then begin

-{$ifdef DebugFrames}

-    // frame delay debug display

-    GoldenRec.Spawn(200,15,1,16,0,-1,ColoredStar,$00ff00);

-{$endif}

-{    showmessage('not getting new frame'+#13#10+

-    'Time:      '+inttostr(floor(Time*1000))+#13#10+

-    'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+

-    'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+

-    'TimeDiff:  '+inttostr(floor(TimeDifference*1000)));

-}

-    Exit;// we don't need a new frame now

-  end;

-  VideoTime:=VideoTime+VideoTimeBase;

-  TimeDifference:=myTime-VideoTime;

-  if TimeDifference >= (FRAMEDROPCOUNT-1)*VideoTimeBase then begin // skip frames

-{$ifdef DebugFrames}

-    //frame drop debug display

-    GoldenRec.Spawn(200,55,1,16,0,-1,ColoredStar,$ff0000);

-{$endif}

-//    showmessage('skipping frames'+#13#10+

-//    'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+

-//    'TimeDiff:  '+inttostr(floor(TimeDifference*1000))+#13#10+

-//    'Time2Skip: '+inttostr(floor((Time-LastFrameTime)*1000)));

-//    av_seek_frame(VideoFormatContext,VideoStreamIndex,Floor(Time*VideoTimeBase),0);

-{    av_seek_frame(VideoFormatContext,-1,Floor((myTime+VideoTimeBase)*1500000),0);

-    VideoTime:=floor(myTime/VideoTimeBase)*VideoTimeBase;}

-    VideoTime:=VideoTime+FRAMEDROPCOUNT*VideoTimeBase;

-    DropFrame:=True;

-  end;

-

-  av_init_packet(@AVPacket);

-  FrameFinished:=0;

-  // read packets until we have a finished frame (or there are no more packets)

-  while (FrameFinished=0) and (av_read_frame(VideoFormatContext, @AVPacket)>=0) do

-  begin

-    // if we got a packet from the video stream, then decode it

-    if (AVPacket.stream_index=VideoStreamIndex) then

-      errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, @frameFinished,

-                                     AVPacket.data, AVPacket.size);

-    // release internal packet structure created by av_read_frame

-      av_free_packet(PAVPacket(@AVPacket));

-  end;

-  if DropFrame then

-    for droppedFrames:=1 to FRAMEDROPCOUNT do begin

-      FrameFinished:=0;

-      // read packets until we have a finished frame (or there are no more packets)

-      while (FrameFinished=0) and (av_read_frame(VideoFormatContext, @AVPacket)>=0) do

-      begin

-        // if we got a packet from the video stream, then decode it

-        if (AVPacket.stream_index=VideoStreamIndex) then

-          errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, @frameFinished,

-                                         AVPacket.data, AVPacket.size);

-        // release internal packet structure created by av_read_frame

-          av_free_packet(PAVPacket(@AVPacket));

-      end;

-    end;

-

-  // if we did not get an new frame, there's nothing more to do

-  if Framefinished=0 then begin

-    GoldenRec.Spawn(220,15,1,16,0,-1,ColoredStar,$0000ff);

-    Exit;

-  end;

-  // otherwise we convert the pixeldata from YUV to RGB

-  errnum:=img_convert(PAVPicture(AVFrameRGB), PIX_FMT_RGB24,

-            PAVPicture(AVFrame), VideoCodecContext^.pix_fmt,

-			      VideoCodecContext^.width, VideoCodecContext^.height);

-//errnum:=1;

-  if errnum >=0 then begin

-    // copy RGB pixeldata to our TextureBuffer

-    // (line by line)

-    FrameDataPtr:=AVFrameRGB^.data[0];

-    linesize:=AVFrameRGB^.linesize[0];

-    for y:=0 to TexY-1 do begin

-      System.Move(FrameDataPtr[y*linesize],TexData[3*y*dataX],linesize);

-    end;

-

-    // generate opengl texture out of whatever we got

-    glBindTexture(GL_TEXTURE_2D, VideoTex);

-    glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, TexData);

-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

-{$ifdef DebugFrames}

-    //frame decode debug display

-    GoldenRec.Spawn(200,35,1,16,0,-1,ColoredStar,$ffff00);

-{$endif}

-

-  end;

-end;

-

-procedure FFmpegDrawGL(Screen: integer);

-begin

-  // have a nice black background to draw on (even if there were errors opening the vid)

-  if Screen=1 then begin

-    glClearColor(0,0,0,0);

-    glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);

-  end;

-  // exit if there's nothing to draw

-  if not VideoOpened then Exit;

-

-  glEnable(GL_TEXTURE_2D);

-  glEnable(GL_BLEND);

-  glColor4f(1, 1, 1, 1);

-  glBindTexture(GL_TEXTURE_2D, VideoTex);

-  glbegin(gl_quads);

-    glTexCoord2f(         0,          0); glVertex2f(400-ScaledVideoWidth/2, 300-ScaledVideoHeight/2);

-    glTexCoord2f(         0, TexY/dataY); glVertex2f(400-ScaledVideoWidth/2, 300+ScaledVideoHeight/2);

-    glTexCoord2f(TexX/dataX, TexY/dataY); glVertex2f(400+ScaledVideoWidth/2, 300+ScaledVideoHeight/2);

-    glTexCoord2f(TexX/dataX,          0); glVertex2f(400+ScaledVideoWidth/2, 300-ScaledVideoHeight/2);

-  glEnd;

-  glDisable(GL_TEXTURE_2D);

-  glDisable(GL_BLEND);

-

-{$ifdef Info}

-  if VideoSkipTime+VideoTime+VideoTimeBase < 0 then begin

-    glColor4f(0.7, 1, 0.3, 1);

-    SetFontStyle (1);

-    SetFontItalic(False);

-    SetFontSize(9);

-    SetFontPos (300, 0);

-    glPrint('Delay due to negative VideoGap');

-    glColor4f(1, 1, 1, 1);

-  end;

-{$endif}

-

-{$ifdef DebugFrames}

-    glColor4f(0, 0, 0, 0.2);

-    glbegin(gl_quads);

-      glVertex2f(0, 0);

-      glVertex2f(0, 70);

-      glVertex2f(250, 70);

-      glVertex2f(250, 0);

-    glEnd;

-

-    glColor4f(1,1,1,1);

-    SetFontStyle (1);

-    SetFontItalic(False);

-    SetFontSize(9);

-    SetFontPos (5, 0);

-    glPrint('delaying frame');

-    SetFontPos (5, 20);

-    glPrint('fetching frame');

-    SetFontPos (5, 40);

-    glPrint('dropping frame');

-{$endif}

-end;

-

-end.

+{############################################################################
+#                   FFmpeg support for UltraStar deluxe                     #
+#                                                                           #
+#   Created by b1indy                                                       #
+#   based on 'An ffmpeg and SDL Tutorial' (http://www.dranger.com/ffmpeg/)  #
+#############################################################################}
+
+//{$define DebugDisplay}  // uncomment if u want to see the debug stuff
+//{$define DebugFrames}
+//{$define Info}
+
+
+unit UVideo;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE DELPHI}
+{$ENDIF}
+
+
+uses SDL,
+     UGraphicClasses,
+     textgl,
+     avcodec,
+     avformat,
+     avutil,
+     math,
+     OpenGL12,
+     SysUtils,
+     {$ifdef DebugDisplay}
+     {$ifdef win32}
+     dialogs,
+     {$endif}
+     {$ENDIF}
+     UIni;
+
+procedure Init;
+procedure FFmpegOpenFile(FileName: pAnsiChar);
+procedure FFmpegClose;
+procedure FFmpegGetFrame(Time: Extended);
+procedure FFmpegDrawGL(Screen: integer);
+procedure FFmpegTogglePause;
+procedure FFmpegSkip(Time: Single);
+
+var
+  VideoOpened, VideoPaused: Boolean;
+  VideoFormatContext: PAVFormatContext;
+  VideoStreamIndex: Integer;
+  VideoCodecContext: PAVCodecContext;
+  VideoCodec: PAVCodec;
+  AVFrame: PAVFrame;
+  AVFrameRGB: PAVFrame;
+  myBuffer: pByte;
+  VideoTex: glUint;
+  TexX, TexY, dataX, dataY: Cardinal;
+  TexData: array of Byte;
+  ScaledVideoWidth, ScaledVideoHeight: Real;
+  VideoAspect: Real;
+  VideoTextureU, VideoTextureV: Real;
+  VideoTimeBase, VideoTime, LastFrameTime, TimeDifference: Extended;
+  VideoSkipTime: Single;
+  
+implementation
+
+{$ifdef DebugDisplay}
+{$ifNdef win32}
+
+procedure showmessage( aMessage : String );
+begin
+  writeln( aMessage );
+end;
+
+{$endif}
+{$ENDIF}
+
+procedure Init;
+begin
+  av_register_all;
+  {$ifdef DebugDisplay}
+  showmessage( 'AV_Register_ALL' );
+  {$endif}
+  
+  VideoOpened:=False;
+  VideoPaused:=False;
+  
+  glGenTextures(1, PglUint(@VideoTex));
+  SetLength(TexData,0);
+end;
+
+procedure FFmpegOpenFile(FileName: pAnsiChar);
+var errnum, i, x,y: Integer;
+  lStreamsCount : Integer;
+begin
+  VideoOpened    := False;
+  VideoPaused    := False;
+  VideoTimeBase  := 0;
+  VideoTime      := 0;
+  LastFrameTime  := 0;
+  TimeDifference := 0;
+  
+  errnum         := av_open_input_file(VideoFormatContext, FileName, Nil, 0, Nil);
+  
+  if(errnum <> 0) then
+  begin
+{$ifdef DebugDisplay}
+    case errnum of
+      AVERROR_UNKNOWN: showmessage('failed to open file '+Filename+#13#10+'AVERROR_UNKNOWN');
+      AVERROR_IO: showmessage('failed to open file '+Filename+#13#10+'AVERROR_IO');
+      AVERROR_NUMEXPECTED: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NUMEXPECTED');
+      AVERROR_INVALIDDATA: showmessage('failed to open file '+Filename+#13#10+'AVERROR_INVALIDDATA');
+      AVERROR_NOMEM: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOMEM');
+      AVERROR_NOFMT: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOFMT');
+      AVERROR_NOTSUPP: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOTSUPP');
+    else showmessage('failed to open file '+Filename+#13#10+'Error number: '+inttostr(Errnum));
+    end;
+{$ENDIF}
+    Exit;
+  end
+  else
+  begin
+    VideoStreamIndex:=-1;
+
+    // Find which stream contains the video
+    if(av_find_stream_info(VideoFormatContext) >= 0) then
+    begin
+      {$ifdef DebugDisplay}
+       writeln( 'FFMPEG debug...  VideoFormatContext^.nb_streams : '+ inttostr( VideoFormatContext^.nb_streams ) );
+      {$endif}
+      for i:= 0 to MAX_STREAMS-1 do
+      begin
+        {$ifdef DebugDisplay}
+        writeln( 'FFMPEG debug...  found stream '+ inttostr(i) + ' stream val ' + inttostr( integer(VideoFormatContext^.streams[i] ) ) );
+        {$endif}
+        try
+          if assigned( VideoFormatContext                    ) AND
+             assigned( VideoFormatContext^.streams[i]        ) AND
+             assigned( VideoFormatContext^.streams[i]^.codec ) THEN
+          begin
+              {$ifdef DebugDisplay}
+            writeln( 'FFMPEG debug...  found stream '+ inttostr(i) + ' code val ' + inttostr( integer(VideoFormatContext^.streams[i].codec ) ) );
+            writeln( 'FFMPEG debug...  found stream '+ inttostr(i) + ' code Type ' + inttostr( integer(VideoFormatContext^.streams[i].codec^.codec_type ) ) );
+              {$endif}
+            if(VideoFormatContext^.streams[i]^.codec^.codec_type=CODEC_TYPE_VIDEO) then
+            begin
+              {$ifdef DebugDisplay}
+              writeln( 'FFMPEG debug, found CODEC_TYPE_VIDEO stream' );
+              {$endif}
+              VideoStreamIndex:=i;
+            end
+            else
+          end;
+        except
+          // TODO : JB_Linux ... this is excepting at line 108...  ( Was 111 previously.. so its prob todo with streams[i]^.codec ..
+    {$ifdef DebugDisplay}
+          writeln( 'FFMPEG error, finding video stream' );
+    {$endif}
+        end;
+
+      end;
+    end;
+    
+    if(VideoStreamIndex >= 0) then
+    begin
+      VideoCodecContext:=VideoFormatContext^.streams[VideoStreamIndex]^.codec;
+      VideoCodec:=avcodec_find_decoder(VideoCodecContext^.codec_id);
+    end
+    else
+    begin
+{$ifdef DebugDisplay}
+      showmessage('found no video stream');
+{$ENDIF}
+      av_close_input_file(VideoFormatContext);
+      Exit;
+    end;
+    
+    if(VideoCodec<>Nil) then
+    begin
+      errnum:=avcodec_open(VideoCodecContext, VideoCodec);
+    end else begin
+{$ifdef DebugDisplay}
+      showmessage('no matching codec found');
+{$ENDIF}
+      avcodec_close(VideoCodecContext);
+      av_close_input_file(VideoFormatContext);
+      Exit;
+    end;
+    if(errnum >=0) then
+    begin
+{$ifdef DebugDisplay}
+       showmessage('Found a matching Codec:'+#13#10#13#10+
+        'Width='+inttostr(VideoCodecContext^.width)+
+        ', Height='+inttostr(VideoCodecContext^.height)+#13#10+
+        'Aspect: '+inttostr(VideoCodecContext^.sample_aspect_ratio.num)+'/'+inttostr(VideoCodecContext^.sample_aspect_ratio.den)+#13#10+
+        'Framerate: '+inttostr(VideoCodecContext^.time_base.num)+'/'+inttostr(VideoCodecContext^.time_base.den));
+{$endif}
+      // allocate space for decoded frame and rgb frame
+      AVFrame:=avcodec_alloc_frame;
+      AVFrameRGB:=avcodec_alloc_frame;
+    end;
+    myBuffer:=Nil;
+    if(AVFrame <> Nil) and (AVFrameRGB <> Nil) then
+    begin
+      myBuffer:=av_malloc(avpicture_get_size(PIX_FMT_RGB24, VideoCodecContext^.width,
+                            VideoCodecContext^.height));
+    end;
+    if myBuffer <> Nil then errnum:=avpicture_fill(PAVPicture(AVFrameRGB), myBuffer, PIX_FMT_RGB24,
+                VideoCodecContext^.width, VideoCodecContext^.height)
+    else begin
+{$ifdef DebugDisplay}
+      showmessage('failed to allocate video buffer');
+{$endif}
+      av_free(AVFrameRGB);
+      av_free(AVFrame);
+      avcodec_close(VideoCodecContext);
+      av_close_input_file(VideoFormatContext);
+      Exit;
+    end;
+    if errnum >=0 then
+    begin
+      VideoOpened:=True;
+
+      TexX := VideoCodecContext^.width;
+      TexY := VideoCodecContext^.height;
+      dataX := Round(Power(2, Ceil(Log2(TexX))));
+      dataY := Round(Power(2, Ceil(Log2(TexY))));
+      SetLength(TexData,dataX*dataY*3);
+      // calculate some information for video display
+      VideoAspect:=VideoCodecContext^.sample_aspect_ratio.num/VideoCodecContext^.sample_aspect_ratio.den;
+      if (VideoAspect = 0) then
+        VideoAspect:=VideoCodecContext^.width/VideoCodecContext^.height
+      else
+        VideoAspect:=VideoAspect*VideoCodecContext^.width/VideoCodecContext^.height;
+      if VideoAspect >= 4/3 then
+      begin
+        ScaledVideoWidth:=800.0;
+        ScaledVideoHeight:=800.0/VideoAspect;
+      end else
+      begin
+        ScaledVideoHeight:=600.0;
+        ScaledVideoWidth:=600.0*VideoAspect;
+      end;
+      VideoTimeBase:=VideoCodecContext^.time_base.num/VideoCodecContext^.time_base.den;
+      // hack to get reasonable timebase for divx
+{$ifdef DebugDisplay}
+      showmessage('framerate: '+inttostr(floor(1/videotimebase))+'fps');
+{$endif}
+      if VideoTimeBase < 0.02 then // 0.02 <-> 50 fps
+      begin
+        VideoTimeBase:=VideoCodecContext^.time_base.den/VideoCodecContext^.time_base.num;
+        while VideoTimeBase > 50 do VideoTimeBase:=VideoTimeBase/10;
+        VideoTimeBase:=1/VideoTimeBase;
+      end;
+{$ifdef DebugDisplay}
+      showmessage('corrected framerate: '+inttostr(floor(1/videotimebase))+'fps');
+      if ((VideoAspect*VideoCodecContext^.width*VideoCodecContext^.height)>200000) then
+        showmessage('you are trying to play a rather large video'+#13#10+
+                    'be prepared to experience some timing problems');
+{$endif}
+    end;
+  end;
+end;
+
+procedure FFmpegClose;
+begin
+  if VideoOpened then begin
+    av_free(myBuffer);
+    av_free(AVFrameRGB);
+    av_free(AVFrame);
+    avcodec_close(VideoCodecContext);
+    av_close_input_file(VideoFormatContext);
+    SetLength(TexData,0);
+    VideoOpened:=False;
+  end;
+end;
+
+procedure FFmpegTogglePause;
+begin
+  if VideoPaused then VideoPaused:=False
+  else VideoPaused:=True;
+end;
+
+procedure FFmpegSkip(Time: Single);
+begin
+  VideoSkiptime:=Time;
+  if VideoSkipTime > 0 then begin
+    av_seek_frame(VideoFormatContext,-1,Floor((VideoSkipTime)*1500000),0);
+    VideoTime:=VideoSkipTime;
+  end;
+end;
+
+procedure FFmpegGetFrame(Time: Extended);
+var
+  FrameFinished: Integer;
+  AVPacket: TAVPacket;
+  errnum, x, y: Integer;
+  FrameDataPtr: PByteArray;
+  linesize: integer;
+  myTime: Extended;
+  DropFrame: Boolean;
+  droppedFrames: Integer;
+const
+  FRAMEDROPCOUNT=3;
+begin
+  if not VideoOpened then Exit;
+  if VideoPaused then Exit;
+  myTime:=Time+VideoSkipTime;
+  TimeDifference:=myTime-VideoTime;
+  DropFrame:=False;
+{  showmessage('Time:      '+inttostr(floor(Time*1000))+#13#10+
+    'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+
+    'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+    'TimeDiff:  '+inttostr(floor(TimeDifference*1000)));
+}
+  if (VideoTime <> 0) and (TimeDifference <= VideoTimeBase) then begin
+{$ifdef DebugFrames}
+    // frame delay debug display
+    GoldenRec.Spawn(200,15,1,16,0,-1,ColoredStar,$00ff00);
+{$endif}
+{    showmessage('not getting new frame'+#13#10+
+    'Time:      '+inttostr(floor(Time*1000))+#13#10+
+    'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+
+    'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+    'TimeDiff:  '+inttostr(floor(TimeDifference*1000)));
+}
+    Exit;// we don't need a new frame now
+  end;
+  VideoTime:=VideoTime+VideoTimeBase;
+  TimeDifference:=myTime-VideoTime;
+  if TimeDifference >= (FRAMEDROPCOUNT-1)*VideoTimeBase then begin // skip frames
+{$ifdef DebugFrames}
+    //frame drop debug display
+    GoldenRec.Spawn(200,55,1,16,0,-1,ColoredStar,$ff0000);
+{$endif}
+//    showmessage('skipping frames'+#13#10+
+//    'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+//    'TimeDiff:  '+inttostr(floor(TimeDifference*1000))+#13#10+
+//    'Time2Skip: '+inttostr(floor((Time-LastFrameTime)*1000)));
+//    av_seek_frame(VideoFormatContext,VideoStreamIndex,Floor(Time*VideoTimeBase),0);
+{    av_seek_frame(VideoFormatContext,-1,Floor((myTime+VideoTimeBase)*1500000),0);
+    VideoTime:=floor(myTime/VideoTimeBase)*VideoTimeBase;}
+    VideoTime:=VideoTime+FRAMEDROPCOUNT*VideoTimeBase;
+    DropFrame:=True;
+  end;
+
+  av_init_packet(@AVPacket);
+  FrameFinished:=0;
+  // read packets until we have a finished frame (or there are no more packets)
+  while (FrameFinished=0) and (av_read_frame(VideoFormatContext, @AVPacket)>=0) do
+  begin
+    // if we got a packet from the video stream, then decode it
+    if (AVPacket.stream_index=VideoStreamIndex) then
+      errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, @frameFinished,
+                                     AVPacket.data, AVPacket.size);
+    // release internal packet structure created by av_read_frame
+      av_free_packet(PAVPacket(@AVPacket));
+  end;
+  if DropFrame then
+    for droppedFrames:=1 to FRAMEDROPCOUNT do begin
+      FrameFinished:=0;
+      // read packets until we have a finished frame (or there are no more packets)
+      while (FrameFinished=0) and (av_read_frame(VideoFormatContext, @AVPacket)>=0) do
+      begin
+        // if we got a packet from the video stream, then decode it
+        if (AVPacket.stream_index=VideoStreamIndex) then
+          errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, @frameFinished,
+                                         AVPacket.data, AVPacket.size);
+        // release internal packet structure created by av_read_frame
+          av_free_packet(PAVPacket(@AVPacket));
+      end;
+    end;
+
+  // if we did not get an new frame, there's nothing more to do
+  if Framefinished=0 then begin
+    GoldenRec.Spawn(220,15,1,16,0,-1,ColoredStar,$0000ff);
+    Exit;
+  end;
+  // otherwise we convert the pixeldata from YUV to RGB
+  errnum:=img_convert(PAVPicture(AVFrameRGB), PIX_FMT_RGB24,
+            PAVPicture(AVFrame), VideoCodecContext^.pix_fmt,
+			      VideoCodecContext^.width, VideoCodecContext^.height);
+//errnum:=1;
+  if errnum >=0 then begin
+    // copy RGB pixeldata to our TextureBuffer
+    // (line by line)
+    FrameDataPtr:=AVFrameRGB^.data[0];
+    linesize:=AVFrameRGB^.linesize[0];
+    for y:=0 to TexY-1 do begin
+      System.Move(FrameDataPtr[y*linesize],TexData[3*y*dataX],linesize);
+    end;
+
+    // generate opengl texture out of whatever we got
+    glBindTexture(GL_TEXTURE_2D, VideoTex);
+    glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, TexData);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+{$ifdef DebugFrames}
+    //frame decode debug display
+    GoldenRec.Spawn(200,35,1,16,0,-1,ColoredStar,$ffff00);
+{$endif}
+
+  end;
+end;
+
+procedure FFmpegDrawGL(Screen: integer);
+begin
+  // have a nice black background to draw on (even if there were errors opening the vid)
+  if Screen=1 then begin
+    glClearColor(0,0,0,0);
+    glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
+  end;
+  // exit if there's nothing to draw
+  if not VideoOpened then Exit;
+
+  glEnable(GL_TEXTURE_2D);
+  glEnable(GL_BLEND);
+  glColor4f(1, 1, 1, 1);
+  glBindTexture(GL_TEXTURE_2D, VideoTex);
+  glbegin(gl_quads);
+    glTexCoord2f(         0,          0); glVertex2f(400-ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
+    glTexCoord2f(         0, TexY/dataY); glVertex2f(400-ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
+    glTexCoord2f(TexX/dataX, TexY/dataY); glVertex2f(400+ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
+    glTexCoord2f(TexX/dataX,          0); glVertex2f(400+ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
+  glEnd;
+  glDisable(GL_TEXTURE_2D);
+  glDisable(GL_BLEND);
+
+{$ifdef Info}
+  if VideoSkipTime+VideoTime+VideoTimeBase < 0 then begin
+    glColor4f(0.7, 1, 0.3, 1);
+    SetFontStyle (1);
+    SetFontItalic(False);
+    SetFontSize(9);
+    SetFontPos (300, 0);
+    glPrint('Delay due to negative VideoGap');
+    glColor4f(1, 1, 1, 1);
+  end;
+{$endif}
+
+{$ifdef DebugFrames}
+    glColor4f(0, 0, 0, 0.2);
+    glbegin(gl_quads);
+      glVertex2f(0, 0);
+      glVertex2f(0, 70);
+      glVertex2f(250, 70);
+      glVertex2f(250, 0);
+    glEnd;
+
+    glColor4f(1,1,1,1);
+    SetFontStyle (1);
+    SetFontItalic(False);
+    SetFontSize(9);
+    SetFontPos (5, 0);
+    glPrint('delaying frame');
+    SetFontPos (5, 20);
+    glPrint('fetching frame');
+    SetFontPos (5, 40);
+    glPrint('dropping frame');
+{$endif}
+end;
+
+end.