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} {$I switches.inc} (* look into av_read_play *) implementation uses SDL, UGraphicClasses, textgl, avcodec, avformat, avutil, math, OpenGL12, SysUtils, {$ifdef DebugDisplay} {$ifdef win32} dialogs, {$endif} {$ENDIF} {$ifdef UseFFMpegAudio} UAudio_FFMpeg, {$endif} UIni, UMusic, UGraphic; var singleton_VideoFFMpeg : IVideoPlayback; type TVideoPlayback_ffmpeg = class( TInterfacedObject, IVideoPlayback ) private fVideoOpened , fVideoPaused : Boolean; fVideoTex : glUint; fVideoSkipTime : Single; VideoFormatContext: PAVFormatContext; VideoStreamIndex , AudioStreamIndex : Integer; VideoCodecContext: PAVCodecContext; VideoCodec: PAVCodec; AVFrame: PAVFrame; AVFrameRGB: PAVFrame; myBuffer: pByte; TexX, TexY, dataX, dataY: Cardinal; ScaledVideoWidth, ScaledVideoHeight: Real; VideoAspect: Real; VideoTextureU, VideoTextureV: Real; VideoTimeBase, VideoTime, LastFrameTime, TimeDifference: Extended; WantedAudioCodecContext, AudioCodecContext : PSDL_AudioSpec; aCodecCtx : PAVCodecContext; function find_stream_ids( const aFormatCtx : PAVFormatContext; Out aFirstVideoStream, aFirstAudioStream : integer ): boolean; public constructor create(); function GetName: String; procedure init(); function Open( aFileName : string): boolean; // true if succeed procedure Close; procedure Play; procedure Pause; procedure Stop; procedure MoveTo(Time: real); function getPosition: real; procedure GetFrame(Time: Extended); procedure DrawGL(Screen: integer); end; const SDL_AUDIO_BUFFER_SIZE = 1024; {$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); {$endif} *) end; try // if AVPacket.data <> nil then av_free_packet( AVPacket ); // JB-ffmpeg except // TODO : JB_FFMpeg ... why does this now AV sometimes ( or always !! ) end; end; if DropFrame then for droppedFrames:=1 to FRAMEDROPCOUNT do begin FrameFinished:=0; // read packets until we have a finished frame (or there are no more packets) while (FrameFinished=0) do begin if (av_read_frame(VideoFormatContext, AVPacket)<0) then Break; // if we got a packet from the video stream, then decode it if (AVPacket.stream_index=VideoStreamIndex) then errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, frameFinished , AVPacket.data, AVPacket.size); // JB-ffmpeg // release internal packet structure created by av_read_frame try // if AVPacket.data <> nil then av_free_packet( AVPacket ); // JB-ffmpeg except // TODO : JB_FFMpeg ... why does this now AV sometimes ( or always !! ) end; end; end; // if we did not get an new frame, there's nothing more to do if Framefinished=0 then begin Exit; end; // otherwise we convert the pixeldata from YUV to RGB errnum:=img_convert(PAVPicture(AVFrameRGB), PIX_FMT_RGB24, PAVPicture(AVFrame), VideoCodecContext^.pix_fmt, VideoCodecContext^.width, VideoCodecContext^.height); if errnum >=0 then begin glBindTexture(GL_TEXTURE_2D, fVideoTex); glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, AVFrameRGB^.data[0]); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); {$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 := 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; // 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; // 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.MoveTo(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.