From 46bb010ca7c5eb04551c030105f9999ca80e472f Mon Sep 17 00:00:00 2001 From: tobigun Date: Sun, 8 Jun 2008 15:33:48 +0000 Subject: - set svn:eol-style to native - removed some svn:executable properties from non-executable files git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/trunk@1144 b956fd51-792f-4845-bead-9b4dfca2ff2c --- Game/Code/Classes/UVideo.pas | 1714 +++++++++++++++++++++--------------------- 1 file changed, 857 insertions(+), 857 deletions(-) (limited to 'Game/Code/Classes/UVideo.pas') diff --git a/Game/Code/Classes/UVideo.pas b/Game/Code/Classes/UVideo.pas index b03f29bf..bef77728 100644 --- a/Game/Code/Classes/UVideo.pas +++ b/Game/Code/Classes/UVideo.pas @@ -1,857 +1,857 @@ -{############################################################################## - # 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 # - # # - # http://www.mail-archive.com/fpc-pascal@lists.freepascal.org/msg09949.html # - # http://www.nabble.com/file/p11795857/mpegpas01.zip # - # # - ##############################################################################} - -unit UVideo; - -//{$define DebugDisplay} // uncomment if u want to see the debug stuff -//{$define DebugFrames} -//{$define VideoBenchmark} -//{$define Info} - -interface - -{$IFDEF FPC} - {$MODE Delphi} -{$ENDIF} - -{$I switches.inc} - -(* - TODO: look into av_read_play -*) - -// use BGR-format for accelerated colorspace conversion with swscale -{.$DEFINE PIXEL_FMT_BGR} - -implementation - -uses - SDL, - textgl, - avcodec, - avformat, - avutil, - avio, - rational, - {$IFDEF UseSWScale} - swscale, - {$ENDIF} - math, - gl, - glext, - SysUtils, - UCommon, - UConfig, - ULog, - UMusic, - UGraphicClasses, - UGraphic; - -const -{$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; - - procedure Reset(); - function DecodeFrame(var AVPacket: TAVPacket; out pts: double): boolean; - function FindStreamIDs( const aFormatCtx : PAVFormatContext; out aFirstVideoStream, aFirstAudioStream : integer ): boolean; - procedure SynchronizeVideo(pFrame: PAVFrame; var pts: double); - public - constructor Create(); - function GetName: String; - procedure Init(); - - 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 - singleton_VideoFFMpeg : IVideoPlayback; - - - -function FFMpegErrorString(Errnum: integer): string; -begin - case Errnum of - AVERROR_IO: Result := 'AVERROR_IO'; - AVERROR_NUMEXPECTED: Result := 'AVERROR_NUMEXPECTED'; - AVERROR_INVALIDDATA: Result := 'AVERROR_INVALIDDATA'; - AVERROR_NOMEM: Result := 'AVERROR_NOMEM'; - AVERROR_NOFMT: Result := 'AVERROR_NOFMT'; - AVERROR_NOTSUPP: Result := 'AVERROR_NOTSUPP'; - AVERROR_NOENT: Result := 'AVERROR_NOENT'; - AVERROR_PATCHWELCOME: Result := 'AVERROR_PATCHWELCOME'; - else Result := 'AVERROR_#'+inttostr(Errnum); - end; -end; - -// 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(pCodecCtx: PAVCodecContext; pFrame: PAVFrame): integer; cdecl; -var - pts: Pint64; - VideoPktPts: Pint64; -begin - Result := avcodec_default_get_buffer(pCodecCtx, pFrame); - VideoPktPts := pCodecCtx^.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^; - pFrame^.opaque := pts; - end; -end; - -procedure PtsReleaseBuffer(pCodecCtx: PAVCodecContext; pFrame: PAVFrame); cdecl; -begin - if (pFrame <> nil) then - av_freep(@pFrame^.opaque); - avcodec_default_release_buffer(pCodecCtx, pFrame); -end; - - -{*------------------------------------------------------------------------------ - * TVideoPlayback_ffmpeg - *------------------------------------------------------------------------------} - -function TVideoPlayback_ffmpeg.GetName: String; -begin - result := 'FFMpeg_Video'; -end; - -{ - @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) -} -function TVideoPlayback_ffmpeg.FindStreamIDs(const aFormatCtx: PAVFormatContext; out aFirstVideoStream, aFirstAudioStream: integer): boolean; -var - i : integer; - st : PAVStream; -begin - // Find the first video stream - aFirstAudioStream := -1; - aFirstVideoStream := -1; - - {$IFDEF DebugDisplay} - debugwriteln('aFormatCtx.nb_streams : ' + inttostr(aFormatCtx.nb_streams)); - {$ENDIF} - - for i := 0 to aFormatCtx.nb_streams-1 do - begin - 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; - end; - - // return true if either an audio- or video-stream was found - result := (aFirstAudioStream > -1) or - (aFirstVideoStream > -1) ; -end; - -procedure TVideoPlayback_ffmpeg.SynchronizeVideo(pFrame: 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 + pFrame^.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); - {$ENDIF} - - if (not DecodeFrame(AVPacket, pts)) then - begin - if Loop then - begin - // Record the time we looped. This is used to keep the loops in time. otherwise they speed - SetPosition(0); - fLoopTime := Time; - end; - Exit; - end; - - // otherwise we convert the pixeldata from YUV to RGB - {$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, RenderAspect: 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} - - ScreenAspect := ScreenW / ScreenH; - RenderAspect := RenderW / RenderH; - ScaledVideoWidth := RenderW; - ScaledVideoHeight := ScaledVideoWidth/VideoAspect * ScreenAspect/RenderAspect; - - // Note: Scaling the width does not look good because the video might contain - // black borders at the top already - //ScaledVideoHeight := RenderH; - //ScaledVideoWidth := ScaledVideoHeight*VideoAspect * RenderAspect/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; - -constructor TVideoPlayback_ffmpeg.Create(); -begin - inherited; - Reset(); - av_register_all(); -end; - -procedure TVideoPlayback_ffmpeg.Init(); -begin - glGenTextures(1, PGLuint(@fVideoTex)); -end; - -procedure TVideoPlayback_ffmpeg.Reset(); -begin - // close previously opened video - Close(); - - fVideoOpened := False; - fVideoPaused := False; - VideoTimeBase := 0; - VideoTime := 0; - VideoStream := nil; - VideoFormatContext := nil; - VideoCodecContext := nil; - VideoStreamIndex := -1; - - AVFrame := nil; - AVFrameRGB := nil; - FrameBuffer := nil; - - 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; - err: GLenum; - AudioStreamIndex: integer; - - procedure CleanOnError(); - begin - if (VideoCodecContext <> nil) then - avcodec_close(VideoCodecContext); - if (VideoFormatContext <> nil) then - av_close_input_file(VideoFormatContext); - av_free(AVFrameRGB); - av_free(AVFrame); - av_free(FrameBuffer); - end; - -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+'" ('+FFMpegErrorString(errnum)+')'); - Exit; - end; - - // update video info - if (av_find_stream_info(VideoFormatContext) < 0) then - begin - Log.LogError('No stream info found', 'TVideoPlayback_ffmpeg.Open'); - CleanOnError(); - Exit; - end; - Log.LogInfo('VideoStreamIndex : ' + inttostr(VideoStreamIndex), 'TVideoPlayback_ffmpeg.Open'); - - // find video stream - FindStreamIDs(VideoFormatContext, VideoStreamIndex, AudioStreamIndex); - if (VideoStreamIndex < 0) then - begin - Log.LogError('No video stream found', 'TVideoPlayback_ffmpeg.Open'); - CleanOnError(); - 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'); - CleanOnError(); - 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; - - errnum := avcodec_open(VideoCodecContext, VideoCodec); - if (errnum < 0) then - begin - Log.LogError('No matching codec found', 'TVideoPlayback_ffmpeg.Open'); - CleanOnError(); - 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'); - CleanOnError(); - 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: ' + FFMpegErrorString(errnum), 'TVideoPlayback_ffmpeg.Open'); - CleanOnError(); - 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'); - - {$IFDEF UseSWScale} - // if available get a SWScale-context -> faster than the deprecated img_convert(). - // SWScale has accelerated support for PIX_FMT_RGB32/PIX_FMT_BGR24/PIX_FMT_BGR565/PIX_FMT_BGR555. - // Note: PIX_FMT_RGB32 is a BGR- and not an RGB-format (maybe a bug)!!! - // The BGR565-formats (GL_UNSIGNED_SHORT_5_6_5) is way too slow because of its - // bad OpenGL support. The BGR formats have MMX(2) implementations but no speed-up - // could be observed in comparison to the RGB versions. - SoftwareScaleContext := sws_getContext( - VideoCodecContext^.width, VideoCodecContext^.height, - integer(VideoCodecContext^.pix_fmt), - VideoCodecContext^.width, VideoCodecContext^.height, - integer(PIXEL_FMT_FFMPEG), - SWS_FAST_BILINEAR, nil, nil, nil); - if (SoftwareScaleContext = nil) then - begin - Log.LogError('Failed to get swscale context', 'TVideoPlayback_ffmpeg.Open'); - CleanOnError(); - Exit; - end; - {$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 fVideoOpened then - begin - av_free(FrameBuffer); - 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); -var - SeekFlags: integer; -begin - 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'); - end; -end; - -function TVideoPlayback_ffmpeg.GetPosition: real; -begin - // TODO: return video-position in seconds - result := VideoTime; -end; - -initialization - singleton_VideoFFMpeg := TVideoPlayback_ffmpeg.create(); - AudioManager.add( singleton_VideoFFMpeg ); - -finalization - AudioManager.Remove( singleton_VideoFFMpeg ); - -end. +{############################################################################## + # 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 # + # # + # http://www.mail-archive.com/fpc-pascal@lists.freepascal.org/msg09949.html # + # http://www.nabble.com/file/p11795857/mpegpas01.zip # + # # + ##############################################################################} + +unit UVideo; + +//{$define DebugDisplay} // uncomment if u want to see the debug stuff +//{$define DebugFrames} +//{$define VideoBenchmark} +//{$define Info} + +interface + +{$IFDEF FPC} + {$MODE Delphi} +{$ENDIF} + +{$I switches.inc} + +(* + TODO: look into av_read_play +*) + +// use BGR-format for accelerated colorspace conversion with swscale +{.$DEFINE PIXEL_FMT_BGR} + +implementation + +uses + SDL, + textgl, + avcodec, + avformat, + avutil, + avio, + rational, + {$IFDEF UseSWScale} + swscale, + {$ENDIF} + math, + gl, + glext, + SysUtils, + UCommon, + UConfig, + ULog, + UMusic, + UGraphicClasses, + UGraphic; + +const +{$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; + + procedure Reset(); + function DecodeFrame(var AVPacket: TAVPacket; out pts: double): boolean; + function FindStreamIDs( const aFormatCtx : PAVFormatContext; out aFirstVideoStream, aFirstAudioStream : integer ): boolean; + procedure SynchronizeVideo(pFrame: PAVFrame; var pts: double); + public + constructor Create(); + function GetName: String; + procedure Init(); + + 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 + singleton_VideoFFMpeg : IVideoPlayback; + + + +function FFMpegErrorString(Errnum: integer): string; +begin + case Errnum of + AVERROR_IO: Result := 'AVERROR_IO'; + AVERROR_NUMEXPECTED: Result := 'AVERROR_NUMEXPECTED'; + AVERROR_INVALIDDATA: Result := 'AVERROR_INVALIDDATA'; + AVERROR_NOMEM: Result := 'AVERROR_NOMEM'; + AVERROR_NOFMT: Result := 'AVERROR_NOFMT'; + AVERROR_NOTSUPP: Result := 'AVERROR_NOTSUPP'; + AVERROR_NOENT: Result := 'AVERROR_NOENT'; + AVERROR_PATCHWELCOME: Result := 'AVERROR_PATCHWELCOME'; + else Result := 'AVERROR_#'+inttostr(Errnum); + end; +end; + +// 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(pCodecCtx: PAVCodecContext; pFrame: PAVFrame): integer; cdecl; +var + pts: Pint64; + VideoPktPts: Pint64; +begin + Result := avcodec_default_get_buffer(pCodecCtx, pFrame); + VideoPktPts := pCodecCtx^.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^; + pFrame^.opaque := pts; + end; +end; + +procedure PtsReleaseBuffer(pCodecCtx: PAVCodecContext; pFrame: PAVFrame); cdecl; +begin + if (pFrame <> nil) then + av_freep(@pFrame^.opaque); + avcodec_default_release_buffer(pCodecCtx, pFrame); +end; + + +{*------------------------------------------------------------------------------ + * TVideoPlayback_ffmpeg + *------------------------------------------------------------------------------} + +function TVideoPlayback_ffmpeg.GetName: String; +begin + result := 'FFMpeg_Video'; +end; + +{ + @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) +} +function TVideoPlayback_ffmpeg.FindStreamIDs(const aFormatCtx: PAVFormatContext; out aFirstVideoStream, aFirstAudioStream: integer): boolean; +var + i : integer; + st : PAVStream; +begin + // Find the first video stream + aFirstAudioStream := -1; + aFirstVideoStream := -1; + + {$IFDEF DebugDisplay} + debugwriteln('aFormatCtx.nb_streams : ' + inttostr(aFormatCtx.nb_streams)); + {$ENDIF} + + for i := 0 to aFormatCtx.nb_streams-1 do + begin + 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; + end; + + // return true if either an audio- or video-stream was found + result := (aFirstAudioStream > -1) or + (aFirstVideoStream > -1) ; +end; + +procedure TVideoPlayback_ffmpeg.SynchronizeVideo(pFrame: 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 + pFrame^.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); + {$ENDIF} + + if (not DecodeFrame(AVPacket, pts)) then + begin + if Loop then + begin + // Record the time we looped. This is used to keep the loops in time. otherwise they speed + SetPosition(0); + fLoopTime := Time; + end; + Exit; + end; + + // otherwise we convert the pixeldata from YUV to RGB + {$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, RenderAspect: 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} + + ScreenAspect := ScreenW / ScreenH; + RenderAspect := RenderW / RenderH; + ScaledVideoWidth := RenderW; + ScaledVideoHeight := ScaledVideoWidth/VideoAspect * ScreenAspect/RenderAspect; + + // Note: Scaling the width does not look good because the video might contain + // black borders at the top already + //ScaledVideoHeight := RenderH; + //ScaledVideoWidth := ScaledVideoHeight*VideoAspect * RenderAspect/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; + +constructor TVideoPlayback_ffmpeg.Create(); +begin + inherited; + Reset(); + av_register_all(); +end; + +procedure TVideoPlayback_ffmpeg.Init(); +begin + glGenTextures(1, PGLuint(@fVideoTex)); +end; + +procedure TVideoPlayback_ffmpeg.Reset(); +begin + // close previously opened video + Close(); + + fVideoOpened := False; + fVideoPaused := False; + VideoTimeBase := 0; + VideoTime := 0; + VideoStream := nil; + VideoFormatContext := nil; + VideoCodecContext := nil; + VideoStreamIndex := -1; + + AVFrame := nil; + AVFrameRGB := nil; + FrameBuffer := nil; + + 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; + err: GLenum; + AudioStreamIndex: integer; + + procedure CleanOnError(); + begin + if (VideoCodecContext <> nil) then + avcodec_close(VideoCodecContext); + if (VideoFormatContext <> nil) then + av_close_input_file(VideoFormatContext); + av_free(AVFrameRGB); + av_free(AVFrame); + av_free(FrameBuffer); + end; + +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+'" ('+FFMpegErrorString(errnum)+')'); + Exit; + end; + + // update video info + if (av_find_stream_info(VideoFormatContext) < 0) then + begin + Log.LogError('No stream info found', 'TVideoPlayback_ffmpeg.Open'); + CleanOnError(); + Exit; + end; + Log.LogInfo('VideoStreamIndex : ' + inttostr(VideoStreamIndex), 'TVideoPlayback_ffmpeg.Open'); + + // find video stream + FindStreamIDs(VideoFormatContext, VideoStreamIndex, AudioStreamIndex); + if (VideoStreamIndex < 0) then + begin + Log.LogError('No video stream found', 'TVideoPlayback_ffmpeg.Open'); + CleanOnError(); + 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'); + CleanOnError(); + 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; + + errnum := avcodec_open(VideoCodecContext, VideoCodec); + if (errnum < 0) then + begin + Log.LogError('No matching codec found', 'TVideoPlayback_ffmpeg.Open'); + CleanOnError(); + 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'); + CleanOnError(); + 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: ' + FFMpegErrorString(errnum), 'TVideoPlayback_ffmpeg.Open'); + CleanOnError(); + 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'); + + {$IFDEF UseSWScale} + // if available get a SWScale-context -> faster than the deprecated img_convert(). + // SWScale has accelerated support for PIX_FMT_RGB32/PIX_FMT_BGR24/PIX_FMT_BGR565/PIX_FMT_BGR555. + // Note: PIX_FMT_RGB32 is a BGR- and not an RGB-format (maybe a bug)!!! + // The BGR565-formats (GL_UNSIGNED_SHORT_5_6_5) is way too slow because of its + // bad OpenGL support. The BGR formats have MMX(2) implementations but no speed-up + // could be observed in comparison to the RGB versions. + SoftwareScaleContext := sws_getContext( + VideoCodecContext^.width, VideoCodecContext^.height, + integer(VideoCodecContext^.pix_fmt), + VideoCodecContext^.width, VideoCodecContext^.height, + integer(PIXEL_FMT_FFMPEG), + SWS_FAST_BILINEAR, nil, nil, nil); + if (SoftwareScaleContext = nil) then + begin + Log.LogError('Failed to get swscale context', 'TVideoPlayback_ffmpeg.Open'); + CleanOnError(); + Exit; + end; + {$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 fVideoOpened then + begin + av_free(FrameBuffer); + 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); +var + SeekFlags: integer; +begin + 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'); + end; +end; + +function TVideoPlayback_ffmpeg.GetPosition: real; +begin + // TODO: return video-position in seconds + result := VideoTime; +end; + +initialization + singleton_VideoFFMpeg := TVideoPlayback_ffmpeg.create(); + AudioManager.add( singleton_VideoFFMpeg ); + +finalization + AudioManager.Remove( singleton_VideoFFMpeg ); + +end. -- cgit v1.2.3