modified ffmpeg usage, to use interface same as bass...

still needs some tidy up, but its working.   :)


git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@515 b956fd51-792f-4845-bead-9b4dfca2ff2c

1 files changed, 358 insertions, 267 deletions

diff --git a/Game/Code/Classes/UVideo.pas b/Game/Code/Classes/UVideo.pas
index ed1e5fe3..6e16a7a3 100644
--- a/Game/Code/Classes/UVideo.pas
+++ b/Game/Code/Classes/UVideo.pas
@@ -22,6 +22,14 @@ interface
   {$MODE DELPHI}
 {$ENDIF}
 
+(*
+
+  look into
+  av_read_play
+
+*)
+
+implementation
 
 uses SDL,
      UGraphicClasses,
@@ -37,56 +45,69 @@ uses SDL,
      dialogs,
      {$endif}
      {$ENDIF}
-     UIni;
+     UIni,
+     UMusic;
 
-procedure Init;
-procedure FFmpegOpenFile(FileName: pAnsiChar);
-procedure FFmpegClose;
-procedure FFmpegGetFrame(Time: Extended);
-procedure FFmpegDrawGL(Screen: integer);
-procedure FFmpegTogglePause;
-procedure FFmpegSkip(Time: Single);
 
-{
-  @author(Jay Binks <jaybinks@gmail.com>)
-  @created(2007-10-09)
-  @lastmod(2007-10-09)
+var
+  singleton_VideoFFMpeg : IVideoPlayback;
 
-  @param(aFormatCtx is a PAVFormatContext returned from av_open_input_file )
-  @param(aFirstVideoStream is an OUT value of type integer, this is the index of the video stream)
-  @param(aFirstAudioStream is an OUT value of type integer, this is the index of the audio stream)
-  @returns(@true on success, @false otherwise)
+type
+    TVideoPlayback_ffmpeg = class( TInterfacedObject, IVideoPlayback )
+    private
+      fVideoOpened   ,
+      fVideoPaused   : Boolean;
 
-  translated from "Setting Up the Audio" section at
-  http://www.dranger.com/ffmpeg/ffmpegtutorial_all.html
- }
-function find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean;
+      fVideoTex      : glUint;
+      fVideoSkipTime : Single;
+
+      fTexData       : array of Byte;
+
+      VideoFormatContext: PAVFormatContext;
+
+      VideoStreamIndex ,
+      AudioStreamIndex : Integer;
+      VideoCodecContext: PAVCodecContext;
+      VideoCodec: PAVCodec;
+      AVFrame: PAVFrame;
+      AVFrameRGB: PAVFrame;
+      myBuffer: pByte;
+
+      TexX, TexY, dataX, dataY: Cardinal;
+
+      ScaledVideoWidth, ScaledVideoHeight: Real;
+      VideoAspect: Real;
+      VideoTextureU, VideoTextureV: Real;
+      VideoTimeBase, VideoTime, LastFrameTime, TimeDifference: Extended;
+
+
+      WantedAudioCodecContext,
+      AudioCodecContext : PSDL_AudioSpec;
+      aCodecCtx         : PAVCodecContext;      
+
+
+      function find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean;
+    public
+      constructor create();
+      function  GetName: String;
+
+      procedure init();
+
+      function  Open( aFileName : string): boolean; // true if succeed
+      procedure Close;

+

+      procedure Play;

+      procedure Pause;
+      procedure Stop;
+
+      procedure MoveTo(Time: real);
+      function  getPosition: real;
+
+      procedure FFmpegGetFrame(Time: Extended); // WANT TO RENAME THESE TO BE MORE GENERIC
+      procedure FFmpegDrawGL(Screen: integer);  // WANT TO RENAME THESE TO BE MORE GENERIC
+
+    end;
 
-var
-  VideoOpened, VideoPaused: Boolean;
-  VideoFormatContext: PAVFormatContext;
-  VideoStreamIndex ,
-  AudioStreamIndex : 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;
-  
-  
-  WantedAudioCodecContext,
-  AudioCodecContext : PSDL_AudioSpec;
-  aCodecCtx         : PAVCodecContext;
-  
-implementation
 
 {$ifdef DebugDisplay}
 //{$ifNdef win32}
@@ -102,15 +123,10 @@ end;
 { ------------------------------------------------------------------------------
 asdf
 ------------------------------------------------------------------------------ }
-procedure Init;
-begin
-  av_register_all;
 
-  VideoOpened:=False;
-  VideoPaused:=False;
-  
-  glGenTextures(1, PglUint(@VideoTex));
-  SetLength(TexData,0);
+function  TVideoPlayback_ffmpeg.GetName: String;
+begin
+  result := 'FFMpeg';

 end;
 
 {
@@ -126,7 +142,7 @@ end;
   translated from "Setting Up the Audio" section at
   http://www.dranger.com/ffmpeg/ffmpegtutorial_all.html
 }
-function find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean;
+function TVideoPlayback_ffmpeg.find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean;
 var
   i : integer;
   st : pAVStream;
@@ -164,202 +180,10 @@ begin
             (aFirstVideoStream > -1) ;  // Didn't find a video stream
 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;
-  VideoFormatContext := 0;
-
-  writeln( Filename );
-  
-  errnum         := av_open_input_file(VideoFormatContext, FileName, Nil, 0, Nil);
-  writeln( 'Errnum : ' +inttostr( errnum ));
-  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;
-    AudioStreamIndex := -1;
-
-    // Find which stream contains the video
-    if( av_find_stream_info(VideoFormatContext) >= 0 ) then
-    begin
-      find_stream_ids( VideoFormatContext, VideoStreamIndex, AudioStreamIndex );
-    
-      writeln( 'VideoStreamIndex : ' + inttostr(VideoStreamIndex) );
-      writeln( 'AudioStreamIndex : ' + inttostr(AudioStreamIndex) );
-    end;
-    aCodecCtx := VideoFormatContext.streams[ AudioStreamIndex ].codec;
-
-    WantedAudioCodecContext.freq     := aCodecCtx^.sample_rate;
-    WantedAudioCodecContext.format   := AUDIO_S16SYS;
-    WantedAudioCodecContext.channels := aCodecCtx^.channels;
-    WantedAudioCodecContext.silence  := 0;
-    WantedAudioCodecContext.samples  := 1024;//SDL_AUDIO_BUFFER_SIZE;
-//    WantedAudioCodecContext.callback := audio_callback;
-    WantedAudioCodecContext.userdata := aCodecCtx;
-
-
-(*
-    if(SDL_OpenAudio(WantedAudioCodecContext, AudioCodecContext) < 0) then
-    begin
-      writeln( 'Could not do SDL_OpenAudio' );
-      exit;
-    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
-{$ifdef DebugDisplay}
-       showmessage('Found a matching Codec: '+ VideoCodecContext^.Codec.Name +#13#10#13#10+
-        '  Width = '+inttostr(VideoCodecContext^.width)+ ', Height='+inttostr(VideoCodecContext^.height)+#13#10+
-        '  Aspect    : '+inttostr(VideoCodecContext^.sample_aspect_ratio.num)+'/'+inttostr(VideoCodecContext^.sample_aspect_ratio.den)+#13#10+
-        '  Framerate : '+inttostr(VideoCodecContext^.time_base.num)+'/'+inttostr(VideoCodecContext^.time_base.den));
-{$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);
+procedure TVideoPlayback_ffmpeg.FFmpegGetFrame(Time: Extended);
 var
   FrameFinished: Integer;
   AVPacket: TAVPacket;
@@ -372,13 +196,13 @@ var
 const
   FRAMEDROPCOUNT=3;
 begin
-  if not VideoOpened then Exit;
+  if not fVideoOpened then Exit;
 
-  if VideoPaused then Exit;
-  
-  myTime:=Time+VideoSkipTime;
-  TimeDifference:=myTime-VideoTime;
-  DropFrame:=False;
+  if fVideoPaused then Exit;
+
+  myTime         := Time   + fVideoSkipTime;
+  TimeDifference := myTime - VideoTime;
+  DropFrame      := False;
 
 {$IFDEF DebugDisplay}
   showmessage('Time:      '+inttostr(floor(Time*1000))+#13#10+
@@ -404,7 +228,8 @@ begin
 
     Exit;// we don't need a new frame now
   end;
-  
+
+
   VideoTime:=VideoTime+VideoTimeBase;
   TimeDifference:=myTime-VideoTime;
   if TimeDifference >= (FRAMEDROPCOUNT-1)*VideoTimeBase then  // skip frames
@@ -415,37 +240,52 @@ begin
 {$endif}
 
 {$IFDEF DebugDisplay}
+
     showmessage('skipping frames'+#13#10+
     'TimeBase:  '+inttostr(floor(VideoTimeBase*1000))+#13#10+
     'TimeDiff:  '+inttostr(floor(TimeDifference*1000))+#13#10+
     'Time2Skip: '+inttostr(floor((Time-LastFrameTime)*1000)));
+
 {$endif}
-//    av_seek_frame(VideoFormatContext,VideoStreamIndex,Floor(Time*VideoTimeBase),0);
+//    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);
+  AVPacket.data := nil;
   av_init_packet( AVPacket ); // JB-ffmpeg
-  
+
+
   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
   while (FrameFinished=0) and (av_read_frame(VideoFormatContext, AVPacket)>=0) do     // JB-ffmpeg
   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);
       errnum := avcodec_decode_video(VideoCodecContext, AVFrame,  frameFinished , AVPacket.data, AVPacket.size); // JB-ffmpeg
 
-      
+
     // release internal packet structure created by av_read_frame
 //      av_free_packet(PAVPacket(@AVPacket));
-      av_free_packet( AVPacket );  // JB-ffmpeg
+
+      try
+        if AVPacket.data <> nil then
+          av_free_packet( AVPacket );  // JB-ffmpeg
+      except
+        // TODO : JB_FFMpeg ... why does this now AV sometimes ( or always !! )
+      end;

+
   end;
-  
+
+
   if DropFrame then
     for droppedFrames:=1 to FRAMEDROPCOUNT do begin
       FrameFinished:=0;
@@ -485,12 +325,12 @@ begin
     linesize     := AVFrameRGB^.linesize[0];
     for y:=0 to TexY-1 do
     begin
-      System.Move(FrameDataPtr[y*linesize],TexData[3*y*dataX],linesize);
+      System.Move(FrameDataPtr[y*linesize],fTexData[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);
+    glBindTexture(GL_TEXTURE_2D, fVideoTex);
+    glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, fTexData);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 {$ifdef DebugFrames}
@@ -501,20 +341,21 @@ begin
   end;
 end;
 
-procedure FFmpegDrawGL(Screen: integer);
+procedure TVideoPlayback_ffmpeg.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
+  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;
+  if not fVideoOpened then Exit;
 
   glEnable(GL_TEXTURE_2D);
   glEnable(GL_BLEND);
   glColor4f(1, 1, 1, 1);
-  glBindTexture(GL_TEXTURE_2D, VideoTex);
+  glBindTexture(GL_TEXTURE_2D, fVideoTex);
   glbegin(gl_quads);
     glTexCoord2f(         0,          0); glVertex2f(400-ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
     glTexCoord2f(         0, TexY/dataY); glVertex2f(400-ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
@@ -525,7 +366,8 @@ begin
   glDisable(GL_BLEND);
 
 {$ifdef Info}
-  if VideoSkipTime+VideoTime+VideoTimeBase < 0 then begin
+  if VideoSkipTime+VideoTime+VideoTimeBase < 0 then
+  begin
     glColor4f(0.7, 1, 0.3, 1);
     SetFontStyle (1);
     SetFontItalic(False);
@@ -558,4 +400,253 @@ begin
 {$endif}
 end;
 
+constructor TVideoPlayback_ffmpeg.create();
+begin
+  writeln( 'UVideo_FFMpeg - TVideoPlayback_ffmpeg.create()' );

+

+  writeln( 'UVideo_FFMpeg - av_register_all' );

+  av_register_all;

+
+  fVideoOpened := False;
+  fVideoPaused := False;
+
+end;

+

+procedure TVideoPlayback_ffmpeg.init();

+begin
+  writeln( 'UVideo_FFMpeg - glGenTextures(1, PglUint(@fVideoTex))' );

+  glGenTextures(1, PglUint(@fVideoTex));
+
+  writeln( 'UVideo_FFMpeg - SetLength(fTexData,0)' );
+  SetLength(fTexData,0);
+end;

+

+

+function TVideoPlayback_ffmpeg.Open( aFileName : string): boolean; // true if succeed

+var

+  errnum, i, x,y: Integer;

+  lStreamsCount : Integer;
+
+begin
+  fVideoOpened       := False;
+  fVideoPaused       := False;
+  VideoTimeBase      := 0;
+  VideoTime          := 0;
+  LastFrameTime      := 0;
+  TimeDifference     := 0;
+  VideoFormatContext := 0;
+
+  writeln( aFileName );
+  
+  errnum         := av_open_input_file(VideoFormatContext, pchar( aFileName ), Nil, 0, Nil);
+  writeln( 'Errnum : ' +inttostr( errnum ));
+  if(errnum <> 0) then
+  begin
+{$ifdef DebugDisplay}
+    case errnum of
+      AVERROR_UNKNOWN: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_UNKNOWN');
+      AVERROR_IO: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_IO');
+      AVERROR_NUMEXPECTED: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_NUMEXPECTED');
+      AVERROR_INVALIDDATA: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_INVALIDDATA');
+      AVERROR_NOMEM: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_NOMEM');
+      AVERROR_NOFMT: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_NOFMT');
+      AVERROR_NOTSUPP: showmessage('failed to open file '+aFileName+#13#10+'AVERROR_NOTSUPP');
+    else showmessage('failed to open file '+aFileName+#13#10+'Error number: '+inttostr(Errnum));
+    end;
+{$ENDIF}
+    Exit;
+  end
+  else
+  begin
+    VideoStreamIndex := -1;
+    AudioStreamIndex := -1;
+
+    // Find which stream contains the video
+    if( av_find_stream_info(VideoFormatContext) >= 0 ) then
+    begin
+      find_stream_ids( VideoFormatContext, VideoStreamIndex, AudioStreamIndex );
+    
+      writeln( 'VideoStreamIndex : ' + inttostr(VideoStreamIndex) );
+      writeln( 'AudioStreamIndex : ' + inttostr(AudioStreamIndex) );
+    end;
+    aCodecCtx := VideoFormatContext.streams[ AudioStreamIndex ].codec;
+
+(*
+    WantedAudioCodecContext.freq     := aCodecCtx^.sample_rate;
+    WantedAudioCodecContext.format   := AUDIO_S16SYS;
+    WantedAudioCodecContext.channels := aCodecCtx^.channels;
+    WantedAudioCodecContext.silence  := 0;
+    WantedAudioCodecContext.samples  := 1024;//SDL_AUDIO_BUFFER_SIZE;
+//    WantedAudioCodecContext.callback := audio_callback;
+    WantedAudioCodecContext.userdata := aCodecCtx;
+*)
+
+(*
+    if(SDL_OpenAudio(WantedAudioCodecContext, AudioCodecContext) < 0) then
+    begin
+      writeln( 'Could not do SDL_OpenAudio' );
+      exit;
+    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
+{$ifdef DebugDisplay}
+       showmessage('Found a matching Codec: '+ VideoCodecContext^.Codec.Name +#13#10#13#10+
+        '  Width = '+inttostr(VideoCodecContext^.width)+ ', Height='+inttostr(VideoCodecContext^.height)+#13#10+
+        '  Aspect    : '+inttostr(VideoCodecContext^.sample_aspect_ratio.num)+'/'+inttostr(VideoCodecContext^.sample_aspect_ratio.den)+#13#10+
+        '  Framerate : '+inttostr(VideoCodecContext^.time_base.num)+'/'+inttostr(VideoCodecContext^.time_base.den));
+{$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
+      fVideoOpened:=True;
+
+      TexX := VideoCodecContext^.width;
+      TexY := VideoCodecContext^.height;
+      dataX := Round(Power(2, Ceil(Log2(TexX))));
+      dataY := Round(Power(2, Ceil(Log2(TexY))));
+      SetLength(fTexData,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 TVideoPlayback_ffmpeg.Close;

+begin
+  if fVideoOpened then
+  begin
+    av_free(myBuffer);
+    av_free(AVFrameRGB);
+    av_free(AVFrame);
+
+    avcodec_close(VideoCodecContext);
+    av_close_input_file(VideoFormatContext);
+
+    SetLength(fTexData,0);
+
+    fVideoOpened:=False;
+  end;
+end;
+

+procedure TVideoPlayback_ffmpeg.Play;

+begin
+end;
+
+procedure TVideoPlayback_ffmpeg.Pause;
+begin
+  fVideoPaused := not fVideoPaused;
+end;
+
+procedure TVideoPlayback_ffmpeg.Stop;
+begin
+end;
+
+procedure TVideoPlayback_ffmpeg.MoveTo(Time: real);
+begin
+  fVideoSkipTime := Time;
+  
+  if fVideoSkipTime > 0 then
+  begin
+    av_seek_frame(VideoFormatContext,-1,Floor((fVideoSkipTime)*1500000),0);
+
+    VideoTime := fVideoSkipTime;
+  end;
+end;
+
+function  TVideoPlayback_ffmpeg.getPosition: real;
+begin
+  result := 0;  

+end;
+
+initialization
+  singleton_VideoFFMpeg := TVideoPlayback_ffmpeg.create();
+
+  writeln( 'UVideo_FFMpeg - Register Playback' );
+  AudioManager.add( IVideoPlayback( singleton_VideoFFMpeg ) );
+
+
+finalization

+  AudioManager.Remove( IVideoPlayback( singleton_VideoFFMpeg ) );

+
+
 end.