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-rw-r--r--Game/Code/Classes/UVideo.pas688
1 files changed, 688 insertions, 0 deletions
diff --git a/Game/Code/Classes/UVideo.pas b/Game/Code/Classes/UVideo.pas
new file mode 100644
index 00000000..66c0c8e6
--- /dev/null
+++ b/Game/Code/Classes/UVideo.pas
@@ -0,0 +1,688 @@
+unit UVideo;
+{< #############################################################################
+# FFmpeg support for UltraStar deluxe #
+# #
+# Created by b1indy #
+# based on 'An ffmpeg and SDL Tutorial' (http://www.dranger.com/ffmpeg/) #
+# #
+# http://www.mail-archive.com/fpc-pascal@lists.freepascal.org/msg09949.html #
+# http://www.nabble.com/file/p11795857/mpegpas01.zip #
+# #
+############################################################################## }
+
+//{$define DebugDisplay} // uncomment if u want to see the debug stuff
+//{$define DebugFrames}
+//{$define Info}
+
+interface
+
+{$IFDEF FPC}
+ {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+(*
+
+ look into
+ av_read_play
+
+*)
+
+implementation
+
+uses SDL,
+ UGraphicClasses,
+ textgl,
+ avcodec,
+ avformat,
+ avutil,
+ {$IFDEF UseSWScale}
+ swscale,
+ {$ENDIF}
+ math,
+ OpenGL12,
+ SysUtils,
+ {$ifdef DebugDisplay}
+ {$ifdef win32}
+ dialogs,
+ {$endif}
+ {$ENDIF}
+ (* FIXME
+ {$ifdef UseFFMpegAudio}
+ UAudioDecoder_FFMpeg,
+ {$endif}
+ *)
+ UIni,
+ UMusic,
+ UGraphic;
+
+
+var
+ singleton_VideoFFMpeg : IVideoPlayback;
+
+type
+ TVideoPlayback_ffmpeg = class( TInterfacedObject, IVideoPlayback )
+ private
+ fVideoOpened ,
+ fVideoPaused : Boolean;
+
+ fVideoTex : glUint;
+ fVideoSkipTime : Single;
+
+ VideoFormatContext: PAVFormatContext;
+
+ VideoStreamIndex ,
+ AudioStreamIndex : Integer;
+ VideoCodecContext: PAVCodecContext;
+ VideoCodec: PAVCodec;
+ AVFrame: PAVFrame;
+ AVFrameRGB: PAVFrame;
+ myBuffer: pByte;
+
+ {$IFDEF UseSWScale}
+ SoftwareScaleContext: PSwsContext;
+ {$ENDIF}
+
+ TexX, TexY, dataX, dataY: Cardinal;
+
+ ScaledVideoWidth, ScaledVideoHeight: Real;
+ VideoAspect: Real;
+ VideoTextureU, VideoTextureV: Real;
+ VideoTimeBase, VideoTime, LastFrameTime, TimeDifference: Extended;
+
+
+ WantedAudioCodecContext,
+ AudioCodecContext : PSDL_AudioSpec;
+ aCodecCtx : PAVCodecContext;
+
+ function find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean;
+
+ public
+ constructor create();
+ function GetName: String;
+ procedure init();
+
+ function Open( aFileName : string): boolean; // true if succeed
+ procedure Close;
+
+ procedure Play;
+ procedure Pause;
+ procedure Stop;
+
+ procedure SetPosition(Time: real);
+ function GetPosition: real;
+
+ procedure GetFrame(Time: Extended);
+ procedure DrawGL(Screen: integer);
+
+ end;
+
+ const
+ SDL_AUDIO_BUFFER_SIZE = 1024;
+
+{$ifdef DebugDisplay}
+//{$ifNdef win32}
+
+procedure showmessage( aMessage : String );
+begin
+ writeln( aMessage );
+end;
+
+//{$endif}
+{$ENDIF}
+
+{ ------------------------------------------------------------------------------
+asdf
+------------------------------------------------------------------------------ }
+
+function TVideoPlayback_ffmpeg.GetName: String;
+begin
+ result := 'FFMpeg';
+end;
+
+{
+ @author(Jay Binks <jaybinks@gmail.com>)
+ @created(2007-10-09)
+ @lastmod(2007-10-09)
+
+ @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)
+
+ translated from "Setting Up the Audio" section at
+ http://www.dranger.com/ffmpeg/ffmpegtutorial_all.html
+}
+function TVideoPlayback_ffmpeg.find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean;
+var
+ i : integer;
+ st : pAVStream;
+begin
+ // Find the first video stream
+ aFirstAudioStream := -1;
+ aFirstVideoStream := -1;
+
+ writeln( ' aFormatCtx.nb_streams : ' + inttostr( aFormatCtx.nb_streams ) );
+ writeln( ' length( aFormatCtx.streams ) : ' + inttostr( length(aFormatCtx.streams) ) );
+
+ i := 0;
+ while ( i < aFormatCtx.nb_streams ) do
+// while ( i < length(aFormatCtx.streams)-1 ) do
+ begin
+ writeln( ' aFormatCtx.streams[i] : ' + inttostr( i ) );
+ st := aFormatCtx.streams[i];
+
+ if(st.codec.codec_type = CODEC_TYPE_VIDEO ) AND
+ (aFirstVideoStream < 0) THEN
+ begin
+ aFirstVideoStream := i;
+ end;
+
+ if ( st.codec.codec_type = CODEC_TYPE_AUDIO ) AND
+ ( aFirstAudioStream < 0) THEN
+ begin
+ aFirstAudioStream := i;
+ end;
+
+ inc( i );
+ end; // while
+
+ result := (aFirstAudioStream > -1) OR
+ (aFirstVideoStream > -1) ; // Didn't find a video stream
+end;
+
+
+
+
+procedure TVideoPlayback_ffmpeg.GetFrame(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 fVideoOpened then Exit;
+
+ if fVideoPaused then Exit;
+
+ myTime := Time + fVideoSkipTime;
+ TimeDifference := myTime - VideoTime;
+ DropFrame := False;
+
+{$IFDEF DebugDisplay}
+ 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)));
+{$endif}
+
+ if (VideoTime <> 0) and (TimeDifference <= VideoTimeBase) then
+ begin
+{$ifdef DebugFrames}
+ // frame delay debug display
+ GoldenRec.Spawn(200,15,1,16,0,-1,ColoredStar,$00ff00);
+{$endif}
+
+{$IFDEF DebugDisplay}
+ showmessage('not getting new frame'+#13#10+
+ 'Time: '+inttostr(floor(Time*1000))+#13#10+
+ 'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+
+ 'TimeBase: '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+ 'TimeDiff: '+inttostr(floor(TimeDifference*1000)));
+{$endif}
+
+ Exit;// we don't need a new frame now
+ end;
+
+ VideoTime:=VideoTime+VideoTimeBase;
+ TimeDifference:=myTime-VideoTime;
+ if TimeDifference >= (FRAMEDROPCOUNT-1)*VideoTimeBase then // skip frames
+ begin
+{$ifdef DebugFrames}
+ //frame drop debug display
+ GoldenRec.Spawn(200,55,1,16,0,-1,ColoredStar,$ff0000);
+{$endif}
+{$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)));
+{$endif}
+ VideoTime:=VideoTime+FRAMEDROPCOUNT*VideoTimeBase;
+ DropFrame:=True;
+ end;
+
+ AVPacket.data := nil;
+ av_init_packet( AVPacket ); // JB-ffmpeg
+
+ FrameFinished:=0;
+ // read packets until we have a finished frame (or there are no more packets)
+ while ( FrameFinished = 0 ) do
+ begin
+ if ( av_read_frame(VideoFormatContext, AVPacket) < 0 ) then
+ break;
+ // if we got a packet from the video stream, then decode it
+ if (AVPacket.stream_index=VideoStreamIndex) then
+ begin
+ errnum := avcodec_decode_video(VideoCodecContext, AVFrame, frameFinished , AVPacket.data, AVPacket.size); // JB-ffmpeg
+ (* FIXME
+ {$ifdef UseFFMpegAudio}
+ end
+ else
+ if (AVPacket.stream_index = AudioStreamIndex ) then
+ begin
+ writeln('Encue Audio packet');
+ audioq.put(AVPacket);
+ {$endif}
+ *)
+ end;
+
+ try
+// if AVPacket.data <> nil then
+ av_free_packet( @AVPacket ); // JB-ffmpeg
+ except
+ // TODO : JB_FFMpeg ... why does this now AV sometimes ( or always !! )
+ end;
+
+ end;
+
+ if DropFrame then
+ for droppedFrames:=1 to FRAMEDROPCOUNT do begin
+ FrameFinished:=0;
+ // read packets until we have a finished frame (or there are no more packets)
+ while (FrameFinished=0) do
+ begin
+ if (av_read_frame(VideoFormatContext, AVPacket)<0) then
+ Break;
+ // if we got a packet from the video stream, then decode it
+ if (AVPacket.stream_index=VideoStreamIndex) then
+ errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, frameFinished , AVPacket.data, AVPacket.size); // JB-ffmpeg
+
+ // release internal packet structure created by av_read_frame
+ try
+// if AVPacket.data <> nil then
+ av_free_packet( @AVPacket ); // JB-ffmpeg
+ except
+ // TODO : JB_FFMpeg ... why does this now AV sometimes ( or always !! )
+ end;
+ end;
+ end;
+
+ // if we did not get an new frame, there's nothing more to do
+ if Framefinished=0 then begin
+ Exit;
+ end;
+
+ // otherwise we convert the pixeldata from YUV to RGB
+ {$IFDEF UseSWScale}
+ errnum:=sws_scale(SoftwareScaleContext,@(AVFrame.data),@(AVFrame.linesize),
+ 0,VideoCodecContext^.Height,
+ @(AVFrameRGB.data),@(AVFrameRGB.linesize));
+ {$ELSE}
+ errnum:=img_convert(PAVPicture(AVFrameRGB), PIX_FMT_RGB24,
+ PAVPicture(AVFrame), VideoCodecContext^.pix_fmt,
+ VideoCodecContext^.width, VideoCodecContext^.height);
+ {$ENDIF}
+
+ if errnum >=0 then
+ begin
+ glBindTexture(GL_TEXTURE_2D, fVideoTex);
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, AVFrameRGB^.data[0]);
+ 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);
+{$endif}
+ end;
+end;
+
+procedure TVideoPlayback_ffmpeg.DrawGL(Screen: integer);
+begin
+ // have a nice black background to draw on (even if there were errors opening the vid)
+ if Screen=1 then
+ begin
+ glClearColor(0,0,0,0);
+ glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
+ end;
+ // exit if there's nothing to draw
+ if not fVideoOpened then Exit;
+
+ glEnable(GL_TEXTURE_2D);
+ glEnable(GL_BLEND);
+ glColor4f(1, 1, 1, 1);
+ glBindTexture(GL_TEXTURE_2D, fVideoTex);
+ glbegin(gl_quads);
+ glTexCoord2f( 0, 0); glVertex2f(400-ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
+ glTexCoord2f( 0, TexY/dataY); glVertex2f(400-ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
+ glTexCoord2f(TexX/dataX, TexY/dataY); glVertex2f(400+ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
+ glTexCoord2f(TexX/dataX, 0); glVertex2f(400+ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
+ glEnd;
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
+
+{$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');
+{$endif}
+end;
+
+constructor TVideoPlayback_ffmpeg.create();
+begin
+ av_register_all;
+
+ fVideoOpened := False;
+ fVideoPaused := False;
+end;
+
+procedure TVideoPlayback_ffmpeg.init();
+begin
+ glGenTextures(1, PglUint(@fVideoTex));
+end;
+
+
+function TVideoPlayback_ffmpeg.Open( aFileName : string): boolean; // true if succeed
+var
+ errnum, i, x,y: Integer;
+ lStreamsCount : Integer;
+
+ wanted_spec ,
+ spec : TSDL_AudioSpec;
+ aCodec : pAVCodec;
+
+ sws_dst_w, sws_dst_h: Integer;
+
+begin
+ fVideoOpened := False;
+ fVideoPaused := False;
+ VideoTimeBase := 0;
+ VideoTime := 0;
+ LastFrameTime := 0;
+ TimeDifference := 0;
+ VideoFormatContext := nil;
+
+// writeln( aFileName );
+
+ errnum := av_open_input_file(VideoFormatContext, pchar( aFileName ), Nil, 0, Nil);
+// writeln( 'Errnum : ' +inttostr( errnum ));
+ if(errnum <> 0) then
+ begin
+{$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;
+{$ENDIF}
+ Exit;
+ end
+ else
+ begin
+ VideoStreamIndex := -1;
+ AudioStreamIndex := -1;
+
+ // Find which stream contains the video
+ if( av_find_stream_info(VideoFormatContext) >= 0 ) then
+ begin
+ find_stream_ids( VideoFormatContext, VideoStreamIndex, AudioStreamIndex );
+
+ writeln( 'VideoStreamIndex : ' + inttostr(VideoStreamIndex) );
+ writeln( 'AudioStreamIndex : ' + inttostr(AudioStreamIndex) );
+ end;
+ // FIXME: AudioStreamIndex is -1 if video has no sound -> memory access error
+ // Just a temporary workaround for now
+ aCodecCtx := nil;
+ if( AudioStreamIndex >= 0) then
+ aCodecCtx := VideoFormatContext.streams[ AudioStreamIndex ].codec;
+
+ (* FIXME
+ {$ifdef UseFFMpegAudio}
+ // This is the audio ffmpeg audio support Jay is working on.
+ if aCodecCtx <> nil then
+ begin
+ wanted_spec.freq := aCodecCtx.sample_rate;
+ wanted_spec.format := AUDIO_S16SYS;
+ wanted_spec.channels := aCodecCtx.channels;
+ wanted_spec.silence := 0;
+ wanted_spec.samples := SDL_AUDIO_BUFFER_SIZE;
+ wanted_spec.callback := UAudio_FFMpeg.audio_callback;
+ wanted_spec.userdata := aCodecCtx;
+
+
+ if (SDL_OpenAudio(@wanted_spec, @spec) < 0) then
+ begin
+ writeln('SDL_OpenAudio: '+SDL_GetError());
+ exit;
+ end;
+
+ writeln( 'SDL opened audio device' );
+
+ aCodec := avcodec_find_decoder(aCodecCtx.codec_id);
+ if (aCodec = nil) then
+ begin
+ writeln('Unsupported codec!');
+ exit;
+ end;
+
+ avcodec_open(aCodecCtx, aCodec);
+
+ writeln( 'Opened the codec' );
+
+ packet_queue_init( audioq );
+ SDL_PauseAudio(0);
+
+ writeln( 'SDL_PauseAudio' );
+
+
+ end;
+ {$endif}
+ *)
+
+ if(VideoStreamIndex >= 0) then
+ begin
+ VideoCodecContext:=VideoFormatContext^.streams[VideoStreamIndex]^.codec;
+ VideoCodec:=avcodec_find_decoder(VideoCodecContext^.codec_id);
+ end
+ else
+ begin
+{$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');
+{$ENDIF}
+ avcodec_close(VideoCodecContext);
+ av_close_input_file(VideoFormatContext);
+ Exit;
+ end;
+ if(errnum >=0) then
+ begin
+ if (VideoCodecContext^.width >1024) or (VideoCodecContext^.height >1024) then
+ begin
+ ScreenPopupError.ShowPopup('Video dimensions\nmust not exceed\n1024 pixels\n\nvideo disabled'); //show error message
+ avcodec_close(VideoCodecContext);
+ av_close_input_file(VideoFormatContext);
+ Exit;
+ end;
+{$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));
+{$endif}
+ // allocate space for decoded frame and rgb frame
+ AVFrame:=avcodec_alloc_frame;
+ AVFrameRGB:=avcodec_alloc_frame;
+ end;
+
+ dataX := Round(Power(2, Ceil(Log2(VideoCodecContext^.width))));
+ dataY := Round(Power(2, Ceil(Log2(VideoCodecContext^.height))));
+ myBuffer:=Nil;
+ if(AVFrame <> Nil) and (AVFrameRGB <> Nil) then
+ begin
+ myBuffer:=av_malloc(avpicture_get_size(PIX_FMT_RGB24, dataX, dataY));
+ end;
+ if myBuffer <> Nil then errnum:=avpicture_fill(PAVPicture(AVFrameRGB), myBuffer, PIX_FMT_RGB24,
+ dataX, dataY)
+ else begin
+ {$ifdef DebugDisplay}
+ showmessage('failed to allocate video buffer');
+ {$endif}
+ av_free(AVFrameRGB);
+ av_free(AVFrame);
+ avcodec_close(VideoCodecContext);
+ av_close_input_file(VideoFormatContext);
+ Exit;
+ end;
+
+ {$IFDEF UseSWScale}
+ SoftwareScaleContext:=sws_getContext(VideoCodecContext^.width,VideoCodecContext^.height,integer(VideoCodecContext^.pix_fmt),
+ dataX, dataY, integer(PIX_FMT_RGB24),
+ SWS_FAST_BILINEAR, nil, nil, nil);
+ if SoftwareScaleContext <> Nil then
+ writeln('got swscale context')
+ else begin
+ writeln('ERROR: didnīt get swscale context');
+ av_free(AVFrameRGB);
+ av_free(AVFrame);
+ avcodec_close(VideoCodecContext);
+ av_close_input_file(VideoFormatContext);
+ Exit;
+ end;
+ {$ENDIF}
+
+ // this is the errnum from avpicture_fill
+ if errnum >=0 then
+ begin
+ fVideoOpened:=True;
+
+ TexX := VideoCodecContext^.width;
+ TexY := VideoCodecContext^.height;
+ dataX := Round(Power(2, Ceil(Log2(TexX))));
+ dataY := Round(Power(2, Ceil(Log2(TexY))));
+ // calculate some information for video display
+ VideoAspect:=VideoCodecContext^.sample_aspect_ratio.num/VideoCodecContext^.sample_aspect_ratio.den;
+ if (VideoAspect = 0) then
+ VideoAspect:=VideoCodecContext^.width/VideoCodecContext^.height
+ else
+ VideoAspect:=VideoAspect*VideoCodecContext^.width/VideoCodecContext^.height;
+ ScaledVideoWidth:=800.0;
+ ScaledVideoHeight:=800.0/VideoAspect;
+ VideoTimeBase:=VideoFormatContext^.streams[VideoStreamIndex]^.r_frame_rate.den/VideoFormatContext^.streams[VideoStreamIndex]^.r_frame_rate.num;
+{$ifdef DebugDisplay}
+ showmessage('framerate: '+inttostr(floor(1/videotimebase))+'fps');
+{$endif}
+ // hack to get reasonable timebase (for divx and others)
+ if VideoTimeBase < 0.02 then // 0.02 <-> 50 fps
+ begin
+ VideoTimeBase:=VideoFormatContext^.streams[VideoStreamIndex]^.r_frame_rate.num/VideoFormatContext^.streams[VideoStreamIndex]^.r_frame_rate.den;
+ while VideoTimeBase > 50 do VideoTimeBase:=VideoTimeBase/10;
+ VideoTimeBase:=1/VideoTimeBase;
+ end;
+ 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);
+
+ 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.SetPosition(Time: real);
+begin
+ fVideoSkipTime := Time;
+
+ if fVideoSkipTime > 0 then
+ begin
+ av_seek_frame(VideoFormatContext,VideoStreamIndex,Floor(Time/VideoTimeBase),AVSEEK_FLAG_ANY);
+
+ VideoTime := fVideoSkipTime;
+ end;
+end;
+
+// what is this supposed to do? return VideoTime?
+function TVideoPlayback_ffmpeg.GetPosition: real;
+begin
+ result := 0;
+end;
+
+initialization
+ singleton_VideoFFMpeg := TVideoPlayback_ffmpeg.create();
+ AudioManager.add( singleton_VideoFFMpeg );
+
+finalization
+ AudioManager.Remove( singleton_VideoFFMpeg );
+
+end.
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