diff options
Diffstat (limited to 'src/Classes/UVideo.pas')
| -rw-r--r-- | src/Classes/UVideo.pas | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/src/Classes/UVideo.pas b/src/Classes/UVideo.pas new file mode 100644 index 00000000..0ab1d350 --- /dev/null +++ b/src/Classes/UVideo.pas @@ -0,0 +1,828 @@ +{############################################################################## + # FFmpeg support for UltraStar deluxe # + # # + # Created by b1indy # + # based on 'An ffmpeg and SDL Tutorial' (http://www.dranger.com/ffmpeg/) # + # with modifications by Jay Binks <jaybinks@gmail.com> # + # # + # http://www.mail-archive.com/fpc-pascal@lists.freepascal.org/msg09949.html # + # http://www.nabble.com/file/p11795857/mpegpas01.zip # + # # + ##############################################################################} + +unit UVideo; + +// uncomment if you want to see the debug stuff +{.$define DebugDisplay} +{.$define DebugFrames} +{.$define VideoBenchmark} +{.$define Info} + +interface + +{$IFDEF FPC} + {$MODE Delphi} +{$ENDIF} + +{$I switches.inc} + +// use BGR-format for accelerated colorspace conversion with swscale +{$IFDEF UseSWScale} + {$DEFINE PIXEL_FMT_BGR} +{$ENDIF} + +implementation + +uses + SDL, + textgl, + avcodec, + avformat, + avutil, + avio, + rational, + {$IFDEF UseSWScale} + swscale, + {$ENDIF} + UMediaCore_FFmpeg, + math, + gl, + glext, + SysUtils, + UCommon, + UConfig, + ULog, + UMusic, + UGraphicClasses, + UGraphic; + +const +{$IFDEF PIXEL_FMT_BGR} + PIXEL_FMT_OPENGL = GL_BGR; + PIXEL_FMT_FFMPEG = PIX_FMT_BGR24; +{$ELSE} + PIXEL_FMT_OPENGL = GL_RGB; + PIXEL_FMT_FFMPEG = PIX_FMT_RGB24; +{$ENDIF} + +type + TVideoPlayback_FFmpeg = class( TInterfacedObject, IVideoPlayback ) + private + fVideoOpened, + fVideoPaused: Boolean; + + VideoStream: PAVStream; + VideoStreamIndex : Integer; + VideoFormatContext: PAVFormatContext; + VideoCodecContext: PAVCodecContext; + VideoCodec: PAVCodec; + + AVFrame: PAVFrame; + AVFrameRGB: PAVFrame; + FrameBuffer: PByte; + + {$IFDEF UseSWScale} + SoftwareScaleContext: PSwsContext; + {$ENDIF} + + fVideoTex: GLuint; + TexWidth, TexHeight: Cardinal; + + VideoAspect: Real; + VideoTimeBase, VideoTime: Extended; + fLoopTime: Extended; + + EOF: boolean; + Loop: boolean; + + Initialized: boolean; + + procedure Reset(); + function DecodeFrame(var AVPacket: TAVPacket; out pts: double): boolean; + procedure SynchronizeVideo(Frame: PAVFrame; var pts: double); + public + function GetName: String; + + function Init(): boolean; + function Finalize: boolean; + + function Open(const 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; + +var + FFmpegCore: TMediaCore_FFmpeg; + + +// These are called whenever we allocate a frame buffer. +// We use this to store the global_pts in a frame at the time it is allocated. +function PtsGetBuffer(CodecCtx: PAVCodecContext; Frame: PAVFrame): integer; cdecl; +var + pts: Pint64; + VideoPktPts: Pint64; +begin + Result := avcodec_default_get_buffer(CodecCtx, Frame); + VideoPktPts := CodecCtx^.opaque; + if (VideoPktPts <> nil) then + begin + // Note: we must copy the pts instead of passing a pointer, because the packet + // (and with it the pts) might change before a frame is returned by av_decode_video. + pts := av_malloc(sizeof(int64)); + pts^ := VideoPktPts^; + Frame^.opaque := pts; + end; +end; + +procedure PtsReleaseBuffer(CodecCtx: PAVCodecContext; Frame: PAVFrame); cdecl; +begin + if (Frame <> nil) then + av_freep(@Frame^.opaque); + avcodec_default_release_buffer(CodecCtx, Frame); +end; + + +{*------------------------------------------------------------------------------ + * TVideoPlayback_ffmpeg + *------------------------------------------------------------------------------} + +function TVideoPlayback_FFmpeg.GetName: String; +begin + result := 'FFmpeg_Video'; +end; + +function TVideoPlayback_FFmpeg.Init(): boolean; +begin + Result := true; + + if (Initialized) then + Exit; + Initialized := true; + + FFmpegCore := TMediaCore_FFmpeg.GetInstance(); + + Reset(); + av_register_all(); + glGenTextures(1, PGLuint(@fVideoTex)); +end; + +function TVideoPlayback_FFmpeg.Finalize(): boolean; +begin + Close(); + glDeleteTextures(1, PGLuint(@fVideoTex)); + Result := true; +end; + +procedure TVideoPlayback_FFmpeg.Reset(); +begin + // close previously opened video + Close(); + + fVideoOpened := False; + fVideoPaused := False; + VideoTimeBase := 0; + VideoTime := 0; + VideoStream := nil; + VideoStreamIndex := -1; + + EOF := false; + + // TODO: do we really want this by default? + Loop := true; + fLoopTime := 0; +end; + +function TVideoPlayback_FFmpeg.Open(const aFileName : string): boolean; // true if succeed +var + errnum: Integer; + AudioStreamIndex: integer; +begin + Result := false; + + Reset(); + + errnum := av_open_input_file(VideoFormatContext, PChar(aFileName), nil, 0, nil); + if (errnum <> 0) then + begin + Log.LogError('Failed to open file "'+aFileName+'" ('+FFmpegCore.GetErrorString(errnum)+')'); + Exit; + end; + + // update video info + if (av_find_stream_info(VideoFormatContext) < 0) then + begin + Log.LogError('No stream info found', 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + Log.LogInfo('VideoStreamIndex : ' + inttostr(VideoStreamIndex), 'TVideoPlayback_ffmpeg.Open'); + + // find video stream + FFmpegCore.FindStreamIDs(VideoFormatContext, VideoStreamIndex, AudioStreamIndex); + if (VideoStreamIndex < 0) then + begin + Log.LogError('No video stream found', 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + + VideoStream := VideoFormatContext^.streams[VideoStreamIndex]; + VideoCodecContext := VideoStream^.codec; + + VideoCodec := avcodec_find_decoder(VideoCodecContext^.codec_id); + if (VideoCodec = nil) then + begin + Log.LogError('No matching codec found', 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + + // set debug options + VideoCodecContext^.debug_mv := 0; + VideoCodecContext^.debug := 0; + + // detect bug-workarounds automatically + VideoCodecContext^.workaround_bugs := FF_BUG_AUTODETECT; + // error resilience strategy (careful/compliant/agressive/very_aggressive) + //VideoCodecContext^.error_resilience := FF_ER_CAREFUL; //FF_ER_COMPLIANT; + // allow non spec compliant speedup tricks. + //VideoCodecContext^.flags2 := VideoCodecContext^.flags2 or CODEC_FLAG2_FAST; + + // Note: avcodec_open() and avcodec_close() are not thread-safe and will + // fail if called concurrently by different threads. + FFmpegCore.LockAVCodec(); + try + errnum := avcodec_open(VideoCodecContext, VideoCodec); + finally + FFmpegCore.UnlockAVCodec(); + end; + if (errnum < 0) then + begin + Log.LogError('No matching codec found', 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + + // register custom callbacks for pts-determination + VideoCodecContext^.get_buffer := PtsGetBuffer; + VideoCodecContext^.release_buffer := PtsReleaseBuffer; + + {$ifdef DebugDisplay} + DebugWriteln('Found a matching Codec: '+ VideoCodecContext^.Codec.Name + sLineBreak + + sLineBreak + + ' Width = '+inttostr(VideoCodecContext^.width) + + ', Height='+inttostr(VideoCodecContext^.height) + sLineBreak + + ' Aspect : '+inttostr(VideoCodecContext^.sample_aspect_ratio.num) + '/' + + inttostr(VideoCodecContext^.sample_aspect_ratio.den) + sLineBreak + + ' Framerate : '+inttostr(VideoCodecContext^.time_base.num) + '/' + + inttostr(VideoCodecContext^.time_base.den)); + {$endif} + + // allocate space for decoded frame and rgb frame + AVFrame := avcodec_alloc_frame(); + AVFrameRGB := avcodec_alloc_frame(); + FrameBuffer := av_malloc(avpicture_get_size(PIXEL_FMT_FFMPEG, + VideoCodecContext^.width, VideoCodecContext^.height)); + + if ((AVFrame = nil) or (AVFrameRGB = nil) or (FrameBuffer = nil)) then + begin + Log.LogError('Failed to allocate buffers', 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + + // TODO: pad data for OpenGL to GL_UNPACK_ALIGNMENT + // (otherwise video will be distorted if width/height is not a multiple of the alignment) + errnum := avpicture_fill(PAVPicture(AVFrameRGB), FrameBuffer, PIXEL_FMT_FFMPEG, + VideoCodecContext^.width, VideoCodecContext^.height); + if (errnum < 0) then + begin + Log.LogError('avpicture_fill failed: ' + FFmpegCore.GetErrorString(errnum), 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + + // calculate some information for video display + VideoAspect := av_q2d(VideoCodecContext^.sample_aspect_ratio); + if (VideoAspect = 0) then + VideoAspect := VideoCodecContext^.width / + VideoCodecContext^.height + else + VideoAspect := VideoAspect * VideoCodecContext^.width / + VideoCodecContext^.height; + + VideoTimeBase := 1/av_q2d(VideoStream^.r_frame_rate); + + // hack to get reasonable timebase (for divx and others) + if (VideoTimeBase < 0.02) then // 0.02 <-> 50 fps + begin + VideoTimeBase := av_q2d(VideoStream^.r_frame_rate); + while (VideoTimeBase > 50) do + VideoTimeBase := VideoTimeBase/10; + VideoTimeBase := 1/VideoTimeBase; + end; + + Log.LogInfo('VideoTimeBase: ' + floattostr(VideoTimeBase), 'TVideoPlayback_ffmpeg.Open'); + Log.LogInfo('Framerate: '+inttostr(floor(1/VideoTimeBase))+'fps', 'TVideoPlayback_ffmpeg.Open'); + + {$IFDEF UseSWScale} + // if available get a SWScale-context -> faster than the deprecated img_convert(). + // SWScale has accelerated support for PIX_FMT_RGB32/PIX_FMT_BGR24/PIX_FMT_BGR565/PIX_FMT_BGR555. + // Note: PIX_FMT_RGB32 is a BGR- and not an RGB-format (maybe a bug)!!! + // The BGR565-formats (GL_UNSIGNED_SHORT_5_6_5) is way too slow because of its + // bad OpenGL support. The BGR formats have MMX(2) implementations but no speed-up + // could be observed in comparison to the RGB versions. + SoftwareScaleContext := sws_getContext( + VideoCodecContext^.width, VideoCodecContext^.height, + integer(VideoCodecContext^.pix_fmt), + VideoCodecContext^.width, VideoCodecContext^.height, + integer(PIXEL_FMT_FFMPEG), + SWS_FAST_BILINEAR, nil, nil, nil); + if (SoftwareScaleContext = nil) then + begin + Log.LogError('Failed to get swscale context', 'TVideoPlayback_ffmpeg.Open'); + Close(); + Exit; + end; + {$ENDIF} + + TexWidth := Round(Power(2, Ceil(Log2(VideoCodecContext^.width)))); + TexHeight := Round(Power(2, Ceil(Log2(VideoCodecContext^.height)))); + + // we retrieve a texture just once with glTexImage2D and update it with glTexSubImage2D later. + // Benefits: glTexSubImage2D is faster and supports non-power-of-two widths/height. + glBindTexture(GL_TEXTURE_2D, fVideoTex); + glTexEnvi(GL_TEXTURE_2D, GL_TEXTURE_ENV_MODE, GL_REPLACE); + glTexImage2D(GL_TEXTURE_2D, 0, 3, TexWidth, TexHeight, 0, + PIXEL_FMT_OPENGL, GL_UNSIGNED_BYTE, nil); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + + + fVideoOpened := True; + + Result := true; +end; + +procedure TVideoPlayback_FFmpeg.Close; +begin + if (FrameBuffer <> nil) then + av_free(FrameBuffer); + if (AVFrameRGB <> nil) then + av_free(AVFrameRGB); + if (AVFrame <> nil) then + av_free(AVFrame); + + AVFrame := nil; + AVFrameRGB := nil; + FrameBuffer := nil; + + if (VideoCodecContext <> nil) then + begin + // avcodec_close() is not thread-safe + FFmpegCore.LockAVCodec(); + try + avcodec_close(VideoCodecContext); + finally + FFmpegCore.UnlockAVCodec(); + end; + end; + + if (VideoFormatContext <> nil) then + av_close_input_file(VideoFormatContext); + + VideoCodecContext := nil; + VideoFormatContext := nil; + + fVideoOpened := False; +end; + +procedure TVideoPlayback_FFmpeg.SynchronizeVideo(Frame: PAVFrame; var pts: double); +var + FrameDelay: double; +begin + if (pts <> 0) then + begin + // if we have pts, set video clock to it + VideoTime := pts; + end else + begin + // if we aren't given a pts, set it to the clock + pts := VideoTime; + end; + // update the video clock + FrameDelay := av_q2d(VideoCodecContext^.time_base); + // if we are repeating a frame, adjust clock accordingly + FrameDelay := FrameDelay + Frame^.repeat_pict * (FrameDelay * 0.5); + VideoTime := VideoTime + FrameDelay; +end; + +function TVideoPlayback_FFmpeg.DecodeFrame(var AVPacket: TAVPacket; out pts: double): boolean; +var + FrameFinished: Integer; + VideoPktPts: int64; + pbIOCtx: PByteIOContext; + errnum: integer; +begin + Result := false; + FrameFinished := 0; + + if EOF then + Exit; + + // read packets until we have a finished frame (or there are no more packets) + while (FrameFinished = 0) do + begin + errnum := av_read_frame(VideoFormatContext, AVPacket); + if (errnum < 0) then + begin + // failed to read a frame, check reason + + {$IF (LIBAVFORMAT_VERSION_MAJOR >= 52)} + pbIOCtx := VideoFormatContext^.pb; + {$ELSE} + pbIOCtx := @VideoFormatContext^.pb; + {$IFEND} + + // check for end-of-file (eof is not an error) + if (url_feof(pbIOCtx) <> 0) then + begin + EOF := true; + Exit; + end; + + // check for errors + if (url_ferror(pbIOCtx) <> 0) then + Exit; + + // url_feof() does not detect an EOF for some mov-files (e.g. deluxe.mov) + // so we have to do it this way. + if ((VideoFormatContext^.file_size <> 0) and + (pbIOCtx^.pos >= VideoFormatContext^.file_size)) then + begin + EOF := true; + Exit; + end; + + // no error -> wait for user input + SDL_Delay(100); + continue; + end; + + // if we got a packet from the video stream, then decode it + if (AVPacket.stream_index = VideoStreamIndex) then + begin + // save pts to be stored in pFrame in first call of PtsGetBuffer() + VideoPktPts := AVPacket.pts; + VideoCodecContext^.opaque := @VideoPktPts; + + // decode packet + avcodec_decode_video(VideoCodecContext, AVFrame, + frameFinished, AVPacket.data, AVPacket.size); + + // reset opaque data + VideoCodecContext^.opaque := nil; + + // update pts + if (AVPacket.dts <> AV_NOPTS_VALUE) then + begin + pts := AVPacket.dts; + end + else if ((AVFrame^.opaque <> nil) and + (Pint64(AVFrame^.opaque)^ <> AV_NOPTS_VALUE)) then + begin + pts := Pint64(AVFrame^.opaque)^; + end + else + begin + pts := 0; + end; + pts := pts * av_q2d(VideoStream^.time_base); + + // synchronize on each complete frame + if (frameFinished <> 0) then + SynchronizeVideo(AVFrame, pts); + end; + + // free the packet from av_read_frame + av_free_packet( @AVPacket ); + end; + + Result := true; +end; + +procedure TVideoPlayback_FFmpeg.GetFrame(Time: Extended); +var + AVPacket: TAVPacket; + errnum: Integer; + myTime: Extended; + TimeDifference: Extended; + DropFrameCount: Integer; + pts: double; + i: Integer; +const + FRAME_DROPCOUNT = 3; +begin + if not fVideoOpened then + Exit; + + if fVideoPaused then + Exit; + + // current time, relative to last loop (if any) + myTime := Time - fLoopTime; + // time since the last frame was returned + TimeDifference := myTime - VideoTime; + + {$IFDEF DebugDisplay} + DebugWriteln('Time: '+inttostr(floor(Time*1000)) + sLineBreak + + 'VideoTime: '+inttostr(floor(VideoTime*1000)) + sLineBreak + + 'TimeBase: '+inttostr(floor(VideoTimeBase*1000)) + sLineBreak + + 'TimeDiff: '+inttostr(floor(TimeDifference*1000))); + {$endif} + + // check if a new frame is needed + if (VideoTime <> 0) and (TimeDifference < VideoTimeBase) then + begin + {$ifdef DebugFrames} + // frame delay debug display + GoldenRec.Spawn(200,15,1,16,0,-1,ColoredStar,$00ff00); + {$endif} + + {$IFDEF DebugDisplay} + DebugWriteln('not getting new frame' + sLineBreak + + 'Time: '+inttostr(floor(Time*1000)) + sLineBreak + + 'VideoTime: '+inttostr(floor(VideoTime*1000)) + sLineBreak + + 'TimeBase: '+inttostr(floor(VideoTimeBase*1000)) + sLineBreak + + 'TimeDiff: '+inttostr(floor(TimeDifference*1000))); + {$endif} + + // we do not need a new frame now + Exit; + end; + + // update video-time to the next frame + VideoTime := VideoTime + VideoTimeBase; + TimeDifference := myTime - VideoTime; + + // check if we have to skip frames + if (TimeDifference >= FRAME_DROPCOUNT*VideoTimeBase) then + begin + {$IFDEF DebugFrames} + //frame drop debug display + GoldenRec.Spawn(200,55,1,16,0,-1,ColoredStar,$ff0000); + {$ENDIF} + {$IFDEF DebugDisplay} + DebugWriteln('skipping frames' + sLineBreak + + 'TimeBase: '+inttostr(floor(VideoTimeBase*1000)) + sLineBreak + + 'TimeDiff: '+inttostr(floor(TimeDifference*1000))); + {$endif} + + // update video-time + DropFrameCount := Trunc(TimeDifference / VideoTimeBase); + VideoTime := VideoTime + DropFrameCount*VideoTimeBase; + + // skip half of the frames, this is much smoother than to skip all at once + for i := 1 to DropFrameCount (*div 2*) do + DecodeFrame(AVPacket, pts); + end; + + {$IFDEF VideoBenchmark} + Log.BenchmarkStart(15); + {$ENDIF} + + if (not DecodeFrame(AVPacket, pts)) then + begin + if Loop then + begin + // Record the time we looped. This is used to keep the loops in time. otherwise they speed + SetPosition(0); + fLoopTime := Time; + end; + Exit; + end; + + // TODO: support for pan&scan + //if (AVFrame.pan_scan <> nil) then + //begin + // Writeln(Format('PanScan: %d/%d', [AVFrame.pan_scan.width, AVFrame.pan_scan.height])); + //end; + + // otherwise we convert the pixeldata from YUV to RGB + {$IFDEF UseSWScale} + errnum := sws_scale(SoftwareScaleContext, @(AVFrame.data), @(AVFrame.linesize), + 0, VideoCodecContext^.Height, + @(AVFrameRGB.data), @(AVFrameRGB.linesize)); + {$ELSE} + errnum := img_convert(PAVPicture(AVFrameRGB), PIXEL_FMT_FFMPEG, + PAVPicture(AVFrame), VideoCodecContext^.pix_fmt, + VideoCodecContext^.width, VideoCodecContext^.height); + {$ENDIF} + + if (errnum < 0) then + begin + Log.LogError('Image conversion failed', 'TVideoPlayback_ffmpeg.GetFrame'); + Exit; + end; + + {$IFDEF VideoBenchmark} + Log.BenchmarkEnd(15); + Log.BenchmarkStart(16); + {$ENDIF} + + // TODO: data is not padded, so we will need to tell OpenGL. + // Or should we add padding with avpicture_fill? (check which one is faster) + //glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + glBindTexture(GL_TEXTURE_2D, fVideoTex); + glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, + VideoCodecContext^.width, VideoCodecContext^.height, + PIXEL_FMT_OPENGL, GL_UNSIGNED_BYTE, AVFrameRGB^.data[0]); + + {$ifdef DebugFrames} + //frame decode debug display + GoldenRec.Spawn(200, 35, 1, 16, 0, -1, ColoredStar, $ffff00); + {$endif} + + {$IFDEF VideoBenchmark} + Log.BenchmarkEnd(16); + Log.LogBenchmark('FFmpeg', 15); + Log.LogBenchmark('Texture', 16); + {$ENDIF} +end; + +procedure TVideoPlayback_FFmpeg.DrawGL(Screen: integer); +var + TexVideoRightPos, TexVideoLowerPos: Single; + ScreenLeftPos, ScreenRightPos: Single; + ScreenUpperPos, ScreenLowerPos: Single; + ScaledVideoWidth, ScaledVideoHeight: Single; + ScreenMidPosX, ScreenMidPosY: Single; + ScreenAspect: Single; +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; + + {$IFDEF VideoBenchmark} + Log.BenchmarkStart(15); + {$ENDIF} + + // TODO: add a SetAspectCorrectionMode() function so we can switch + // aspect correction. The screens video backgrounds look very ugly with aspect + // correction because of the white bars at the top and bottom. + + ScreenAspect := ScreenW / ScreenH; + ScaledVideoWidth := RenderW; + ScaledVideoHeight := RenderH * ScreenAspect/VideoAspect; + + // Note: Scaling the width does not look good because the video might contain + // black borders at the top already + //ScaledVideoHeight := RenderH; + //ScaledVideoWidth := RenderW * VideoAspect/ScreenAspect; + + // center the video + ScreenMidPosX := RenderW/2; + ScreenMidPosY := RenderH/2; + ScreenLeftPos := ScreenMidPosX - ScaledVideoWidth/2; + ScreenRightPos := ScreenMidPosX + ScaledVideoWidth/2; + ScreenUpperPos := ScreenMidPosY - ScaledVideoHeight/2; + ScreenLowerPos := ScreenMidPosY + ScaledVideoHeight/2; + // the video-texture contains empty borders because its width and height must be + // a power of 2. So we have to determine the texture coords of the video. + TexVideoRightPos := VideoCodecContext^.width / TexWidth; + TexVideoLowerPos := VideoCodecContext^.height / TexHeight; + + // we could use blending for brightness control, but do we need this? + glDisable(GL_BLEND); + + // TODO: disable other stuff like lightning, etc. + + glEnable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_2D, fVideoTex); + glColor3f(1, 1, 1); + glBegin(GL_QUADS); + // upper-left coord + glTexCoord2f(0, 0); + glVertex2f(ScreenLeftPos, ScreenUpperPos); + // lower-left coord + glTexCoord2f(0, TexVideoLowerPos); + glVertex2f(ScreenLeftPos, ScreenLowerPos); + // lower-right coord + glTexCoord2f(TexVideoRightPos, TexVideoLowerPos); + glVertex2f(ScreenRightPos, ScreenLowerPos); + // upper-right coord + glTexCoord2f(TexVideoRightPos, 0); + glVertex2f(ScreenRightPos, ScreenUpperPos); + glEnd; + glDisable(GL_TEXTURE_2D); + + {$IFDEF VideoBenchmark} + Log.BenchmarkEnd(15); + Log.LogBenchmark('DrawGL', 15); + {$ENDIF} + + {$IFDEF Info} + if (fVideoSkipTime+VideoTime+VideoTimeBase < 0) then + begin + glColor4f(0.7, 1, 0.3, 1); + SetFontStyle (1); + SetFontItalic(False); + SetFontSize(9); + SetFontPos (300, 0); + glPrint('Delay due to negative VideoGap'); + glColor4f(1, 1, 1, 1); + end; + {$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; + +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); +var + SeekFlags: integer; +begin + if not fVideoOpened then + Exit; + + if (Time < 0) then + Time := 0; + + // TODO: handle loop-times + //Time := Time mod VideoDuration; + + // backward seeking might fail without AVSEEK_FLAG_BACKWARD + SeekFlags := AVSEEK_FLAG_ANY; + if (Time < VideoTime) then + SeekFlags := SeekFlags or AVSEEK_FLAG_BACKWARD; + + VideoTime := Time; + EOF := false; + + if (av_seek_frame(VideoFormatContext, VideoStreamIndex, Floor(Time/VideoTimeBase), SeekFlags) < 0) then + begin + Log.LogError('av_seek_frame() failed', 'TVideoPlayback_ffmpeg.SetPosition'); + Exit; + end; + + avcodec_flush_buffers(VideoCodecContext); +end; + +function TVideoPlayback_FFmpeg.GetPosition: real; +begin + // TODO: return video-position in seconds + Result := VideoTime; +end; + +initialization + MediaManager.Add(TVideoPlayback_FFmpeg.Create); + +end. |