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Diffstat (limited to '')
| -rw-r--r-- | Game/Code/SMpeg/Uffmpeg.pas | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/Game/Code/SMpeg/Uffmpeg.pas b/Game/Code/SMpeg/Uffmpeg.pas new file mode 100644 index 00000000..3d21f33c --- /dev/null +++ b/Game/Code/SMpeg/Uffmpeg.pas @@ -0,0 +1,265 @@ +unit Uffmpeg;
+
+interface
+uses SDL, UGraphicClasses, textgl, avcodec, avformat, avutil, math, OpenGL12, SysUtils, UIni, dialogs;
+
+procedure Init;
+procedure FFmpegOpenFile(FileName: pAnsiChar);
+procedure FFmpegClose;
+procedure FFmpegGetFrame(Time: Extended);
+procedure FFmpegDrawGL;
+procedure FFmpegTogglePause;
+procedure FFmpegSkip(Time: Single);
+
+var
+ VideoOpened, VideoPaused: Boolean;
+ VideoFormatContext: PAVFormatContext;
+ VideoStreamIndex: Integer;
+ VideoCodecContext: PAVCodecContext;
+ VideoCodec: PAVCodec;
+ AVFrame: PAVFrame;
+ AVFrameRGB: PAVFrame;
+ myBuffer: pByte;
+ VideoTex: glUint;
+ TexX, TexY, dataX, dataY: Cardinal;
+ TexData: array of Byte;
+ ScaledVideoWidth, ScaledVideoHeight: Real;
+ VideoAspect: Real;
+ VideoTextureU, VideoTextureV: Real;
+ VideoTimeBase, VideoTime, LastFrameTime, TimeDifference: Extended;
+ VideoSkipTime: Single;
+
+implementation
+
+const DebugDisplay=True;
+
+procedure Init;
+begin
+ av_register_all;
+ VideoOpened:=False;
+ VideoPaused:=False;
+ glGenTextures(1, PglUint(&VideoTex));
+ SetLength(TexData,0);
+end;
+
+procedure FFmpegOpenFile(FileName: pAnsiChar);
+var errnum, i, x,y: Integer;
+begin
+ VideoOpened:=False;
+ VideoPaused:=False;
+ VideoTimeBase:=0;
+ VideoTime:=0;
+ LastFrameTime:=0;
+ TimeDifference:=0;
+ errnum:=av_open_input_file(VideoFormatContext, FileName, Nil, 0, Nil);
+ if(errnum <> 0)
+ then begin
+ case errnum of
+ AVERROR_UNKNOWN: showmessage('failed to open file '+Filename+#13#10+'AVERROR_UNKNOWN');
+ AVERROR_IO: showmessage('failed to open file '+Filename+#13#10+'AVERROR_IO');
+ AVERROR_NUMEXPECTED: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NUMEXPECTED');
+ AVERROR_INVALIDDATA: showmessage('failed to open file '+Filename+#13#10+'AVERROR_INVALIDDATA');
+ AVERROR_NOMEM: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOMEM');
+ AVERROR_NOFMT: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOFMT');
+ AVERROR_NOTSUPP: showmessage('failed to open file '+Filename+#13#10+'AVERROR_NOTSUPP');
+ else showmessage('failed to open file '+Filename+#13#10+'Error number: '+inttostr(Errnum));
+ end;
+ Exit;
+ end
+ else begin
+ VideoStreamIndex:=-1;
+ if(av_find_stream_info(VideoFormatContext)>=0) then
+ begin
+ for i:=0 to VideoFormatContext^.nb_streams-1 do
+ if(VideoFormatContext^.streams[i]^.codec^.codec_type=CODEC_TYPE_VIDEO) then begin
+ VideoStreamIndex:=i;
+ end else
+ end;
+ if(VideoStreamIndex >= 0) then
+ begin
+ VideoCodecContext:=VideoFormatContext^.streams[VideoStreamIndex]^.codec;
+ VideoCodec:=avcodec_find_decoder(VideoCodecContext^.codec_id);
+ end else showmessage('found no video stream');
+ if(VideoCodec<>Nil) then
+ begin
+ errnum:=avcodec_open(VideoCodecContext, VideoCodec);
+ end else showmessage('no matching codec found');
+ if(errnum >=0) then
+ begin
+ showmessage('Found a matching Codec:'+#13#10#13#10+
+ 'Width='+inttostr(VideoCodecContext^.width)+
+ ', Height='+inttostr(VideoCodecContext^.height)+#13#10+
+ 'Aspect: '+inttostr(VideoCodecContext^.sample_aspect_ratio.num)+'/'+inttostr(VideoCodecContext^.sample_aspect_ratio.den)+#13#10+
+ 'Framerate: '+inttostr(VideoCodecContext^.time_base.num)+'/'+inttostr(VideoCodecContext^.time_base.den));
+ // allocate space for decoded frame and rgb frame
+ AVFrame:=avcodec_alloc_frame;
+ AVFrameRGB:=avcodec_alloc_frame;
+ end;
+ myBuffer:=Nil;
+ if(AVFrame <> Nil) and (AVFrameRGB <> Nil) then
+ begin
+ myBuffer:=av_malloc(avpicture_get_size(PIX_FMT_RGB24, VideoCodecContext^.width,
+ VideoCodecContext^.height));
+ end;
+ if myBuffer <> Nil then errnum:=avpicture_fill(PAVPicture(AVFrameRGB), myBuffer, PIX_FMT_RGB24,
+ VideoCodecContext^.width, VideoCodecContext^.height)
+ else showmessage('failed to allocate video buffer');
+ if errnum >=0 then
+ begin
+ VideoOpened:=True;
+
+ TexX := VideoCodecContext^.width;
+ TexY := VideoCodecContext^.height;
+ dataX := Round(Power(2, Ceil(Log2(TexX))));
+ dataY := Round(Power(2, Ceil(Log2(TexY))));
+ SetLength(TexData,dataX*dataY*3);
+ // calculate some information for video display
+ VideoAspect:=VideoCodecContext^.sample_aspect_ratio.num/VideoCodecContext^.sample_aspect_ratio.den;
+ if (VideoAspect = 0) then
+ VideoAspect:=VideoCodecContext^.width/VideoCodecContext^.height
+ else
+ VideoAspect:=VideoAspect*VideoCodecContext^.width/VideoCodecContext^.height;
+ if VideoAspect >= 4/3 then
+ begin
+ ScaledVideoWidth:=800.0;
+ ScaledVideoHeight:=800.0/VideoAspect;
+ end else
+ begin
+ ScaledVideoHeight:=600.0;
+ ScaledVideoWidth:=600.0*VideoAspect;
+ end;
+ VideoTimeBase:=VideoCodecContext^.time_base.num/VideoCodecContext^.time_base.den;
+ if (VideoAspect*VideoCodecContext^.width*VideoCodecContext^.height)>200000 then
+ showmessage('you are trying to play a rather large video'+#13#10+
+ 'be prepared to experience some timing problems');
+ end;
+ end;
+end;
+
+procedure FFmpegClose;
+begin
+ if VideoOpened then begin
+ av_free(myBuffer);
+ av_free(AVFrameRGB);
+ av_free(AVFrame);
+ avcodec_close(VideoCodecContext);
+ av_close_input_file(VideoFormatContext);
+ SetLength(TexData,0);
+ VideoOpened:=False;
+ end;
+end;
+
+procedure FFmpegTogglePause;
+begin
+ if VideoPaused then VideoPaused:=False
+ else VideoPaused:=True;
+end;
+
+procedure FFmpegSkip(Time: Single);
+begin
+ VideoSkiptime:=Time;
+end;
+
+procedure FFmpegGetFrame(Time: Extended);
+var
+ FrameFinished: Integer;
+ AVPacket: TAVPacket;
+ errnum, x, y: Integer;
+ FrameDataPtr: PByteArray;
+ linesize: integer;
+ myTime: Extended;
+begin
+ if not VideoOpened then Exit;
+ if VideoPaused then Exit;
+ myTime:=Time+VideoSkipTime;
+ TimeDifference:=myTime-VideoTime;
+{ showmessage('Time: '+inttostr(floor(Time*1000))+#13#10+
+ 'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+
+ 'TimeBase: '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+ 'TimeDiff: '+inttostr(floor(TimeDifference*1000)));
+}
+ if (VideoTime <> 0) and (TimeDifference <= VideoTimeBase) then begin
+ if DebugDisplay then GoldenRec.Spawn(200,15,1,16,0,-1,ColoredStar,$00ff00);
+{ showmessage('not getting new frame'+#13#10+
+ 'Time: '+inttostr(floor(Time*1000))+#13#10+
+ 'VideoTime: '+inttostr(floor(VideoTime*1000))+#13#10+
+ 'TimeBase: '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+ 'TimeDiff: '+inttostr(floor(TimeDifference*1000)));
+}
+ Exit;// we don't need a new frame now
+ end;
+ VideoTime:=VideoTime+VideoTimeBase;
+ TimeDifference:=myTime-VideoTime;
+ if TimeDifference >= 3*VideoTimeBase then begin // skip frames
+ if DebugDisplay then GoldenRec.Spawn(200,35,1,16,0,-1,ColoredStar,$ff0000);
+// showmessage('skipping frames'+#13#10+
+// 'TimeBase: '+inttostr(floor(VideoTimeBase*1000))+#13#10+
+// 'TimeDiff: '+inttostr(floor(TimeDifference*1000))+#13#10+
+// 'Time2Skip: '+inttostr(floor((Time-LastFrameTime)*1000)));
+// av_seek_frame(VideoFormatContext,VideoStreamIndex,Floor(Time*VideoTimeBase),0);
+ av_seek_frame(VideoFormatContext,-1,Floor((myTime)*1100000),0);
+ VideoTime:=floor(myTime/VideoTimeBase)*VideoTimeBase;
+ end;
+
+ FrameFinished:=0;
+ // read packets until we have a finished frame (or there are no more packets)
+ while (FrameFinished=0) and (av_read_frame(VideoFormatContext, @AVPacket)>=0) do
+ begin
+ // if we got a packet from the video stream, then decode it
+ if (AVPacket.stream_index=VideoStreamIndex) then
+ errnum:=avcodec_decode_video(VideoCodecContext, AVFrame, @frameFinished,
+ AVPacket.data, AVPacket.size);
+ // release internal packet structure created by av_read_frame
+ av_free_packet(PAVPacket(@AVPacket));
+ end;
+ // if we did not get an new frame, there's nothing more to do
+ if Framefinished=0 then Exit;
+ // otherwise we convert the pixeldata from YUV to RGB
+ errnum:=img_convert(PAVPicture(AVFrameRGB), PIX_FMT_RGB24,
+ PAVPicture(AVFrame), VideoCodecContext^.pix_fmt,
+ VideoCodecContext^.width, VideoCodecContext^.height);
+ if errnum >=0 then begin
+ // copy RGB pixeldata to our TextureBuffer
+ // (line by line)
+ FrameDataPtr:=AVFrameRGB^.data[0];
+ linesize:=AVFrameRGB^.linesize[0];
+ for y:=0 to TexY-1 do begin
+ System.Move(FrameDataPtr[y*linesize],TexData[3*y*dataX],linesize);
+ end;
+
+ // generate opengl texture out of whatever we got
+ glBindTexture(GL_TEXTURE_2D, VideoTex);
+ glTexImage2D(GL_TEXTURE_2D, 0, 3, dataX, dataY, 0, GL_RGB, GL_UNSIGNED_BYTE, TexData);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ end;
+end;
+
+procedure FFmpegDrawGL;
+begin
+ if not VideoOpened then Exit;
+ glEnable(GL_TEXTURE_2D);
+ glEnable(GL_BLEND);
+ glColor4f(1, 1, 1, 1);
+ glBindTexture(GL_TEXTURE_2D, VideoTex);
+ glbegin(gl_quads);
+ glTexCoord2f( 0, 0); glVertex2f(400-ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
+ glTexCoord2f( 0, TexY/dataY); glVertex2f(400-ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
+ glTexCoord2f(TexX/dataX, TexY/dataY); glVertex2f(400+ScaledVideoWidth/2, 300+ScaledVideoHeight/2);
+ glTexCoord2f(TexX/dataX, 0); glVertex2f(400+ScaledVideoWidth/2, 300-ScaledVideoHeight/2);
+ glEnd;
+ glDisable(GL_TEXTURE_2D);
+ glDisable(GL_BLEND);
+
+ if DebugDisplay then begin
+ SetFontStyle (2);
+ SetFontItalic(False);
+ SetFontSize(9);
+ SetFontPos (5, 0);
+ glPrint('delaying frame');
+ SetFontPos (5, 20);
+ glPrint('dropping frame');
+ end;
+end;
+
+end.
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