diff options
Diffstat (limited to 'Game/Code/Classes/UVideo.pas')
| -rw-r--r-- | Game/Code/Classes/UVideo.pas | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/Game/Code/Classes/UVideo.pas b/Game/Code/Classes/UVideo.pas new file mode 100644 index 00000000..2040965f --- /dev/null +++ b/Game/Code/Classes/UVideo.pas @@ -0,0 +1,466 @@ +{############################################################################ +# 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, NegativeSkipTime: 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; + NegativeSkipTime:=Time; + if VideoSkipTime > 0 then begin + av_seek_frame(VideoFormatContext,-1,Floor((VideoSkipTime)*1000000),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; + if (NegativeSkipTime < 0)and(Time+NegativeSkipTime>=0) then NegativeSkipTime:=0; + 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(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(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,$0000ff); + Exit; + end; + // otherwise we convert the pixeldata from YUV to RGB + errnum:=img_convert(PAVPicture(AVFrameRGB), PIX_FMT_RGB24, + PAVPicture(AVFrame), VideoCodecContext^.pix_fmt, + VideoCodecContext^.width, VideoCodecContext^.height); +//errnum:=1; + if errnum >=0 then begin + // copy RGB pixeldata to our TextureBuffer + // (line by line) + FrameDataPtr:=Pointer(AVFrameRGB^.data[0]); + linesize:=AVFrameRGB^.linesize[0]; + for y:=0 to TexY-1 do begin + System.Move(FrameDataPtr[y*linesize],TexData[3*y*dataX],linesize); + end; + + // generate opengl texture out of whatever we got + glBindTexture(GL_TEXTURE_2D, VideoTex); + glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, TexData); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); +{$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; + // if we're still inside negative skip, then exit + if (NegativeSkipTime < 0) 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. |