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-rw-r--r--Game/Code/Classes/UVideo.pas828
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diff --git a/Game/Code/Classes/UVideo.pas b/Game/Code/Classes/UVideo.pas
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--- a/Game/Code/Classes/UVideo.pas
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-{##############################################################################
- # 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.