mirror of https://github.com/odrling/Aegisub
parent
fabfcd2a73
commit
02e15b0ac5
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@ -1,6 +1,5 @@
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#include <windows.h>
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#include <stdio.h>
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#include <map>
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#include <vector>
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#include <stdlib.h>
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#include <errno.h>
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@ -20,13 +19,26 @@ extern "C" {
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#include "matroskacodecs.c"
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class FFBase : public IClip {
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protected:
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VideoInfo VI;
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public:
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bool __stdcall GetParity(int n) { return false; }
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void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) { }
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void __stdcall SetCacheHints(int cachehints, int frame_range) { }
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PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env) { return NULL; }
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const VideoInfo& __stdcall GetVideoInfo() { return VI; }
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FFBase() {
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memset(&VI, 0, sizeof(VI));
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}
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};
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class FFVideoBase : public FFBase {
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private:
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SwsContext *SWS;
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int ConvertToFormat;
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int ConvertFromFormat;
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protected:
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VideoInfo VI;
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struct FrameInfo {
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int64_t DTS;
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bool KeyFrame;
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@ -134,43 +146,76 @@ protected:
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}
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public:
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virtual bool __stdcall GetParity(int n) { return 0; }
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virtual void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) { }
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virtual void __stdcall SetCacheHints(int cachehints, int frame_range) { }
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virtual const VideoInfo& __stdcall GetVideoInfo() { return VI; }
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FFBase() {
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FFVideoBase() {
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SWS = NULL;
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ConvertToFormat = PIX_FMT_NONE;
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ConvertFromFormat = PIX_FMT_NONE;
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memset(&VI, 0, sizeof(VI));
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}
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};
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class FFMKVSource : public FFBase {
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class FFAudioBase : public FFBase {
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protected:
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struct SampleInfo {
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int64_t SampleStart;
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int64_t DTS;
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int64_t FilePos;
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bool KeyFrame;
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SampleInfo(int64_t _SampleStart, int64_t _DTS, int64_t _FilePos, bool _KeyFrame) {
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DTS = _DTS;
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SampleStart = _SampleStart;
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FilePos = _FilePos;
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KeyFrame = _KeyFrame;
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}
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};
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std::vector<SampleInfo> SI;
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int FindClosestAudioKeyFrame(int64_t Sample) {
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for (unsigned int i = SI.size() - 1; i > 0; i--)
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if (SI[i].SampleStart <= Sample && SI[i].KeyFrame)
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return i;
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return 0;
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}
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int SampleFromDTS(int64_t DTS) {
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for (unsigned int i = 0; i < SI.size(); i++)
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if (SI[i].DTS == DTS)
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return i;
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return -1;
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}
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int ClosestSampleFromDTS(int64_t DTS) {
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int Index = 0;
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int64_t BestDiff = 0xFFFFFFFFFFFFFF;
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for (unsigned int i = 0; i < SI.size(); i++) {
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int64_t CurrentDiff = FFABS(SI[i].DTS - DTS);
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if (CurrentDiff < BestDiff) {
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BestDiff = CurrentDiff;
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Index = i;
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}
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}
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return Index;
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}
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};
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class FFMatroskaBase {
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private:
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StdIoStream ST;
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unsigned int BufferSize;
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CompressedStream *CS;
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protected:
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AVCodecContext CodecContext;
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AVCodec *Codec;
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AVFrame *Frame;
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int CurrentFrame;
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StdIoStream ST;
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MatroskaFile *MF;
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int Track;
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char ErrorMessage[256];
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unsigned int BufferSize;
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uint8_t *Buffer;
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CompressedStream *CS;
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unsigned int ReadNextFrame(int64_t *FirstStartTime, IScriptEnvironment *Env);
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int DecodeNextFrame(AVFrame *Frame, int64_t *FirstStartTime, IScriptEnvironment* Env);
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public:
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FFMKVSource(const char *Source, int Track, FILE *Timecodes, bool Cache, FILE *CacheFile, IScriptEnvironment* Env) {
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FFMatroskaBase(const char *Source, int _Track, unsigned char TrackType, IScriptEnvironment* Env) {
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Track = _Track;
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BufferSize = 0;
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Buffer = NULL;
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Frame = NULL;
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CS = NULL;
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CurrentFrame = 0;
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memset(&ST,0,sizeof(ST));
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ST.base.read = (int (__cdecl *)(InputStream *,ulonglong,void *,int))StdIoRead;
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if (Track < 0)
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for (unsigned int i = 0; i < mkv_GetNumTracks(MF); i++)
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if (mkv_GetTrackInfo(MF, i)->Type == TT_VIDEO) {
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if (mkv_GetTrackInfo(MF, i)->Type == TrackType) {
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Track = i;
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break;
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}
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if (Track < 0)
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Env->ThrowError("FFmpegSource: No video track found");
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Env->ThrowError("FFmpegSource: No suitable track found");
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if ((unsigned int)Track >= mkv_GetNumTracks(MF))
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Env->ThrowError("FFmpegSource: Invalid track number: %d", Track);
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Env->ThrowError("FFmpegSource: Invalid track number");
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TrackInfo *TI = mkv_GetTrackInfo(MF, Track);
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if (TI->Type != TT_VIDEO)
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Env->ThrowError("FFmpegSource: Selected track is not video");
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if (TI->Type != TrackType)
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Env->ThrowError("FFmpegSource: Selected track is not of the right type");
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mkv_SetTrackMask(MF, ~(1 << Track));
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if (avcodec_open(&CodecContext, Codec) < 0)
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Env->ThrowError("FFmpegSource: Could not open codec");
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VI.image_type = VideoInfo::IT_TFF;
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VI.width = TI->AV.Video.PixelWidth;
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VI.height = TI->AV.Video.PixelHeight;
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VI.fps_denominator = 1;
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VI.fps_numerator = 30;
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SetOutputFormat(CodecContext.pix_fmt, Env);
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// Needs to be indexed?
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if (!(Cache && LoadFrameInfoFromFile(CacheFile))) {
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unsigned int TrackNumber, FrameSize, FrameFlags;
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uint64_t StartTime, EndTime, FilePos;
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while (mkv_ReadFrame(MF, 0, &TrackNumber, &StartTime, &EndTime, &FilePos, &FrameSize, &FrameFlags) == 0) {
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FrameToDTS.push_back(FrameInfo(StartTime, (FrameFlags & FRAME_KF) != 0));
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VI.num_frames++;
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}
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mkv_Seek(MF, FrameToDTS[0].DTS, MKVF_SEEK_TO_PREV_KEYFRAME);
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if (Cache) {
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fprintf(CacheFile, "%d\n", VI.num_frames);
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for (int i = 0; i < VI.num_frames; i++)
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fprintf(CacheFile, "%lld %d\n", FrameToDTS[i].DTS, (int)(FrameToDTS[i].KeyFrame ? 1 : 0));
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}
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}
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if (Timecodes)
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for (int i = 0; i < VI.num_frames; i++)
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fprintf(Timecodes, "%f\n", (FrameToDTS[i].DTS * mkv_TruncFloat(TI->TimecodeScale)) / (double)(1000000));
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Frame = avcodec_alloc_frame();
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}
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~FFMKVSource() {
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~FFMatroskaBase() {
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free(Buffer);
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mkv_Close(MF);
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fclose(ST.fp);
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av_free(Frame);
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avcodec_close(&CodecContext);
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}
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PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* Env);
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};
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unsigned int FFMKVSource::ReadNextFrame(int64_t *FirstStartTime, IScriptEnvironment *Env) {
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unsigned int ReadNextFrame(int64_t *FirstStartTime, IScriptEnvironment *Env) {
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unsigned int TrackNumber, FrameFlags, FrameSize;
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uint64_t EndTime, FilePos, StartTime;
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*FirstStartTime = -1;
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return 0;
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}
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};
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class FFMKASource : public FFAudioBase, private FFMatroskaBase {
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private:
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int CurrentSample;
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int DecodeNextAudioBlock(uint8_t *Buf, int64_t *FirstStartTime, int64_t *Count, IScriptEnvironment* Env);
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public:
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FFMKASource(const char *Source, int _Track, IScriptEnvironment* Env) : FFMatroskaBase(Source, _Track, TT_AUDIO, Env) {
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CurrentSample = 0;
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TrackInfo *TI = mkv_GetTrackInfo(MF, Track);
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switch (CodecContext.sample_fmt) {
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case SAMPLE_FMT_U8: VI.sample_type = SAMPLE_INT8; break;
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case SAMPLE_FMT_S16: VI.sample_type = SAMPLE_INT16; break;
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case SAMPLE_FMT_S24: VI.sample_type = SAMPLE_INT24; break;
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case SAMPLE_FMT_S32: VI.sample_type = SAMPLE_INT32; break;
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case SAMPLE_FMT_FLT: VI.sample_type = SAMPLE_FLOAT; break;
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default:
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Env->ThrowError("FFmpegSource: Unsupported/unknown sample format");
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}
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VI.nchannels = TI->AV.Audio.Channels;
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VI.audio_samples_per_second = mkv_TruncFloat(TI->AV.Audio.SamplingFreq);
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unsigned TrackNumber, FrameSize, FrameFlags;
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ulonglong StartTime, EndTime, FilePos;
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while (mkv_ReadFrame(MF, 0, &TrackNumber, &StartTime, &EndTime, &FilePos, &FrameSize, &FrameFlags) == 0) {
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if (!(FrameFlags & FRAME_UNKNOWN_START))
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SI.push_back(SampleInfo(VI.num_audio_samples, StartTime, FilePos, (FrameFlags & FRAME_KF) != 0));
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if (true) {
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switch (CodecContext.codec_id) {
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case CODEC_ID_MP3:
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case CODEC_ID_MP2:
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VI.num_audio_samples += 1152; break;
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default:
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Env->ThrowError("Only mp2 and mp3 is currently supported in matroska");
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}
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} else {
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}
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}
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mkv_Seek(MF, SI[0].DTS, MKVF_SEEK_TO_PREV_KEYFRAME);
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avcodec_flush_buffers(&CodecContext);
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}
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void __stdcall GetAudio(void* Buf, __int64 Start, __int64 Count, IScriptEnvironment* Env);
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};
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int FFMKASource::DecodeNextAudioBlock(uint8_t *Buf, int64_t *FirstStartTime, int64_t *Count, IScriptEnvironment* Env) {
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int Ret = -1;
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int FrameSize;
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int64_t TempStartTime = -1;
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*FirstStartTime = -1;
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*Count = 0;
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while (FrameSize = ReadNextFrame(&TempStartTime, Env)) {
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if (*FirstStartTime < 0)
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*FirstStartTime = TempStartTime;
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uint8_t *Data = (uint8_t *)Buffer;
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int Size = FrameSize;
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while (Size > 0) {
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int TempOutputBufSize = AVCODEC_MAX_AUDIO_FRAME_SIZE;
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Ret = avcodec_decode_audio2(&CodecContext, (int16_t *)Buf, &TempOutputBufSize, Data, Size);
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if (Ret < 0)
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goto Done;
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Size -= Ret;
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Data += Ret;
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Buf += TempOutputBufSize;
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*Count += VI.AudioSamplesFromBytes(TempOutputBufSize);
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if (Size <= 0)
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goto Done;
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}
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}
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Done:
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return Ret;
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}
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void __stdcall FFMKASource::GetAudio(void* Buf, __int64 Start, __int64 Count, IScriptEnvironment* Env) {
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bool HasSeeked = false;
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int ClosestKF = FindClosestAudioKeyFrame(Start);
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memset(Buf, 0, VI.BytesFromAudioSamples(Count));
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if (Start < CurrentSample || SI[ClosestKF].SampleStart > CurrentSample) {
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mkv_Seek(MF, SI[max(ClosestKF - 10, 0)].DTS, MKVF_SEEK_TO_PREV_KEYFRAME);
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avcodec_flush_buffers(&CodecContext);
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HasSeeked = true;
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}
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uint8_t *DstBuf = (uint8_t *)Buf;
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int64_t RemainingSamples = Count;
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int64_t DecodeCount;
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do {
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int64_t StartTime;
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uint8_t DecodingBuffer[AVCODEC_MAX_AUDIO_FRAME_SIZE];
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int64_t DecodeStart = CurrentSample;
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int Ret = DecodeNextAudioBlock(DecodingBuffer, &StartTime, &DecodeCount, Env);
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if (HasSeeked) {
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HasSeeked = false;
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int CurrentSampleIndex = SampleFromDTS(StartTime);
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if (StartTime < 0 || CurrentSampleIndex < 0 || (CurrentSample = DecodeStart = SI[max(CurrentSampleIndex, 0)].SampleStart) < 0)
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Env->ThrowError("FFmpegSource: Sample accurate seeking is not possible in this file");
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}
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int OffsetBytes = VI.BytesFromAudioSamples(max(0, Start - DecodeStart));
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int CopyBytes = max(0, VI.BytesFromAudioSamples(min(RemainingSamples, DecodeCount - max(0, Start - DecodeStart))));
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memcpy(DstBuf, DecodingBuffer + OffsetBytes, CopyBytes);
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DstBuf += CopyBytes;
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CurrentSample += DecodeCount;
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RemainingSamples -= VI.AudioSamplesFromBytes(CopyBytes);
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} while (RemainingSamples > 0 && DecodeCount > 0);
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}
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class FFMKVSource : public FFVideoBase, private FFMatroskaBase {
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private:
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AVFrame *Frame;
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int CurrentFrame;
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int DecodeNextFrame(AVFrame *Frame, int64_t *FirstStartTime, IScriptEnvironment* Env);
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public:
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FFMKVSource(const char *Source, int _Track, FILE *Timecodes, bool Cache, FILE *CacheFile, IScriptEnvironment* Env) : FFMatroskaBase(Source, _Track, TT_VIDEO, Env) {
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Frame = NULL;
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CurrentFrame = 0;
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TrackInfo *TI = mkv_GetTrackInfo(MF, Track);
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VI.image_type = VideoInfo::IT_TFF;
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VI.width = TI->AV.Video.PixelWidth;
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VI.height = TI->AV.Video.PixelHeight;
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VI.fps_denominator = 1;
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VI.fps_numerator = 30;
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SetOutputFormat(CodecContext.pix_fmt, Env);
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// Needs to be indexed?
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if (!(Cache && LoadFrameInfoFromFile(CacheFile))) {
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unsigned int TrackNumber, FrameSize, FrameFlags;
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uint64_t StartTime, EndTime, FilePos;
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while (mkv_ReadFrame(MF, 0, &TrackNumber, &StartTime, &EndTime, &FilePos, &FrameSize, &FrameFlags) == 0) {
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FrameToDTS.push_back(FrameInfo(StartTime, (FrameFlags & FRAME_KF) != 0));
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VI.num_frames++;
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}
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if (VI.num_frames == 0)
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Env->ThrowError("FFmpegSource: Video track contains no frames");
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mkv_Seek(MF, FrameToDTS[0].DTS, MKVF_SEEK_TO_PREV_KEYFRAME);
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if (Cache) {
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fprintf(CacheFile, "%d\n", VI.num_frames);
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for (int i = 0; i < VI.num_frames; i++)
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fprintf(CacheFile, "%lld %d\n", FrameToDTS[i].DTS, (int)(FrameToDTS[i].KeyFrame ? 1 : 0));
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}
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}
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if (Timecodes)
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for (int i = 0; i < VI.num_frames; i++)
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fprintf(Timecodes, "%f\n", (FrameToDTS[i].DTS * mkv_TruncFloat(TI->TimecodeScale)) / (double)(1000000));
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Frame = avcodec_alloc_frame();
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}
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~FFMKVSource() {
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av_free(Frame);
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}
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PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* Env);
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};
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int FFMKVSource::DecodeNextFrame(AVFrame *Frame, int64_t *FirstStartTime, IScriptEnvironment* Env) {
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int FrameFinished = 0;
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@ -350,9 +537,14 @@ int FFMKVSource::DecodeNextFrame(AVFrame *Frame, int64_t *FirstStartTime, IScrip
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Ret = avcodec_decode_video(&CodecContext, Frame, &FrameFinished, Buffer, FrameSize);
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if (FrameFinished)
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break;
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goto Done;
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}
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// Flush the last frame
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if (CurrentFrame == VI.num_frames - 1)
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Ret = avcodec_decode_video(&CodecContext, Frame, &FrameFinished, NULL, 0);
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Done:
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return Ret;
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}
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@ -373,7 +565,7 @@ PVideoFrame __stdcall FFMKVSource::GetFrame(int n, IScriptEnvironment* Env) {
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HasSeeked = false;
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if (StartTime < 0 || (CurrentFrame = FrameFromDTS(StartTime)) < 0)
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Env->ThrowError("FFmpegSource: Frame accurate seeking not possible in this file");
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Env->ThrowError("FFmpegSource: Frame accurate seeking is not possible in this file");
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}
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CurrentFrame++;
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@ -382,21 +574,17 @@ PVideoFrame __stdcall FFMKVSource::GetFrame(int n, IScriptEnvironment* Env) {
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return OutputFrame(Frame, Env);
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}
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class FFmpegSource : public FFBase {
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private:
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class FFAVFormatBase {
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protected:
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AVFormatContext *FormatContext;
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AVCodecContext *CodecContext;
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AVCodec *Codec;
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AVFrame *Frame;
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int Track;
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int CurrentFrame;
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int SeekMode;
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int DecodeNextFrame(AVFrame *Frame, int64_t *DTS);
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public:
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FFmpegSource(const char *Source, int _Track, int _SeekMode, FILE *Timecodes, bool Cache, FILE *CacheFile, IScriptEnvironment* Env) : Track(_Track), SeekMode(_SeekMode) {
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CurrentFrame = 0;
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Frame = NULL;
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FFAVFormatBase(const char *Source, int _Track, CodecType TrackType, IScriptEnvironment* Env) {
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||||
FormatContext = NULL;
|
||||
Codec = NULL;
|
||||
Track = _Track;
|
||||
|
||||
if (av_open_input_file(&FormatContext, Source, NULL, 0, NULL) != 0)
|
||||
Env->ThrowError("FFmpegSource: Couldn't open \"%s\"", Source);
|
||||
|
@ -404,21 +592,21 @@ public:
|
|||
if (av_find_stream_info(FormatContext) < 0)
|
||||
Env->ThrowError("FFmpegSource: Couldn't find stream information");
|
||||
|
||||
if (Track >= (int)FormatContext->nb_streams)
|
||||
Env->ThrowError("FFmpegSource: Invalid track number");
|
||||
|
||||
if (Track < 0)
|
||||
for(unsigned int i = 0; i < FormatContext->nb_streams; i++)
|
||||
if(FormatContext->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) {
|
||||
if(FormatContext->streams[i]->codec->codec_type == TrackType) {
|
||||
Track = i;
|
||||
break;
|
||||
}
|
||||
|
||||
if(Track < -1)
|
||||
Env->ThrowError("FFmpegSource: Couldn't find a video stream");
|
||||
Env->ThrowError("FFmpegSource: No suitable track found");
|
||||
|
||||
if (FormatContext->streams[Track]->codec->codec_type != CODEC_TYPE_VIDEO)
|
||||
Env->ThrowError("FFmpegSource: Selected stream doesn't contain video");
|
||||
if (Track >= (int)FormatContext->nb_streams)
|
||||
Env->ThrowError("FFmpegSource: Invalid track number");
|
||||
|
||||
if (FormatContext->streams[Track]->codec->codec_type != TrackType)
|
||||
Env->ThrowError("FFmpegSource: Selected track is not of the right type");
|
||||
|
||||
CodecContext = FormatContext->streams[Track]->codec;
|
||||
|
||||
|
@ -428,6 +616,151 @@ public:
|
|||
|
||||
if(avcodec_open(CodecContext, Codec) < 0)
|
||||
Env->ThrowError("FFmpegSource: Could not open codec");
|
||||
}
|
||||
|
||||
~FFAVFormatBase() {
|
||||
avcodec_close(CodecContext);
|
||||
av_close_input_file(FormatContext);
|
||||
}
|
||||
};
|
||||
|
||||
class FFAudioSource : public FFAudioBase, private FFAVFormatBase {
|
||||
private:
|
||||
int CurrentSample;
|
||||
|
||||
int DecodeNextAudioBlock(uint8_t *Buf, int64_t *DTS, int64_t *Count, IScriptEnvironment* Env);
|
||||
public:
|
||||
FFAudioSource(const char *Source, int _Track, IScriptEnvironment* Env) : FFAVFormatBase(Source, _Track, CODEC_TYPE_AUDIO, Env) {
|
||||
CurrentSample = 0;
|
||||
|
||||
switch (CodecContext->sample_fmt) {
|
||||
case SAMPLE_FMT_U8: VI.sample_type = SAMPLE_INT8; break;
|
||||
case SAMPLE_FMT_S16: VI.sample_type = SAMPLE_INT16; break;
|
||||
case SAMPLE_FMT_S24: VI.sample_type = SAMPLE_INT24; break;
|
||||
case SAMPLE_FMT_S32: VI.sample_type = SAMPLE_INT32; break;
|
||||
case SAMPLE_FMT_FLT: VI.sample_type = SAMPLE_FLOAT; break;
|
||||
default:
|
||||
Env->ThrowError("FFmpegSource: Unsupported/unknown sample format");
|
||||
}
|
||||
|
||||
VI.nchannels = CodecContext->channels;
|
||||
VI.audio_samples_per_second = CodecContext->sample_rate;
|
||||
|
||||
if (CodecContext->frame_size == 0)
|
||||
Env->ThrowError("Variable frame sizes currently unsupported");
|
||||
AVPacket Packet;
|
||||
while (av_read_frame(FormatContext, &Packet) >= 0) {
|
||||
if (Packet.stream_index == Track) {
|
||||
SI.push_back(SampleInfo(VI.num_audio_samples, Packet.dts, Packet.pos, (Packet.flags & PKT_FLAG_KEY) != 0));
|
||||
VI.num_audio_samples += CodecContext->frame_size;
|
||||
}
|
||||
av_free_packet(&Packet);
|
||||
}
|
||||
|
||||
if (VI.num_audio_samples == 0)
|
||||
Env->ThrowError("FFmpegSource: Audio track contains no samples");
|
||||
|
||||
av_seek_frame(FormatContext, Track, SI[0].DTS, AVSEEK_FLAG_BACKWARD);
|
||||
avcodec_flush_buffers(CodecContext);
|
||||
}
|
||||
|
||||
void __stdcall GetAudio(void* Buf, __int64 Start, __int64 Count, IScriptEnvironment* Env);
|
||||
};
|
||||
|
||||
int FFAudioSource::DecodeNextAudioBlock(uint8_t *Buf, int64_t *DTS, int64_t *Count, IScriptEnvironment* Env) {
|
||||
AVPacket Packet;
|
||||
int Ret = -1;
|
||||
*Count = 0;
|
||||
*DTS = -1;
|
||||
|
||||
while (av_read_frame(FormatContext, &Packet) >= 0) {
|
||||
if (Packet.stream_index == Track) {
|
||||
if (*DTS < 0)
|
||||
*DTS = Packet.dts;
|
||||
|
||||
uint8_t *Data = (uint8_t *)Packet.data;
|
||||
int Size = Packet.size;
|
||||
|
||||
while (Size > 0) {
|
||||
int TempOutputBufSize = AVCODEC_MAX_AUDIO_FRAME_SIZE;
|
||||
Ret = avcodec_decode_audio2(CodecContext, (int16_t *)Buf, &TempOutputBufSize, Data, Size);
|
||||
if (Ret < 0) {
|
||||
av_free_packet(&Packet);
|
||||
goto Done;
|
||||
}
|
||||
|
||||
Size -= Ret;
|
||||
Data += Ret;
|
||||
Buf += TempOutputBufSize;
|
||||
*Count += VI.AudioSamplesFromBytes(TempOutputBufSize);
|
||||
|
||||
if (Size <= 0) {
|
||||
av_free_packet(&Packet);
|
||||
goto Done;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
av_free_packet(&Packet);
|
||||
}
|
||||
|
||||
Done:
|
||||
return Ret;
|
||||
}
|
||||
|
||||
void __stdcall FFAudioSource::GetAudio(void* Buf, __int64 Start, __int64 Count, IScriptEnvironment* Env) {
|
||||
bool HasSeeked = false;
|
||||
int ClosestKF = FindClosestAudioKeyFrame(Start);
|
||||
|
||||
memset(Buf, 0, VI.BytesFromAudioSamples(Count));
|
||||
|
||||
if (Start < CurrentSample || SI[ClosestKF].SampleStart > CurrentSample) {
|
||||
av_seek_frame(FormatContext, Track, SI[max(ClosestKF - 10, 0)].DTS, AVSEEK_FLAG_BACKWARD);
|
||||
avcodec_flush_buffers(CodecContext);
|
||||
HasSeeked = true;
|
||||
}
|
||||
|
||||
uint8_t *DstBuf = (uint8_t *)Buf;
|
||||
int64_t RemainingSamples = Count;
|
||||
int64_t DecodeCount;
|
||||
|
||||
do {
|
||||
int64_t StartTime;
|
||||
uint8_t DecodingBuffer[AVCODEC_MAX_AUDIO_FRAME_SIZE];
|
||||
int64_t DecodeStart = CurrentSample;
|
||||
int Ret = DecodeNextAudioBlock(DecodingBuffer, &StartTime, &DecodeCount, Env);
|
||||
|
||||
if (HasSeeked) {
|
||||
HasSeeked = false;
|
||||
|
||||
if (StartTime < 0 || (CurrentSample = DecodeStart = SI[max(ClosestSampleFromDTS(StartTime) - 0, 0)].SampleStart) < 0)
|
||||
Env->ThrowError("FFmpegSource: Sample accurate seeking is not possible in this file");
|
||||
}
|
||||
|
||||
int OffsetBytes = VI.BytesFromAudioSamples(max(0, Start - DecodeStart));
|
||||
int CopyBytes = max(0, VI.BytesFromAudioSamples(min(RemainingSamples, DecodeCount - max(0, Start - DecodeStart))));
|
||||
|
||||
memcpy(DstBuf, DecodingBuffer + OffsetBytes, CopyBytes);
|
||||
DstBuf += CopyBytes;
|
||||
|
||||
CurrentSample += DecodeCount;
|
||||
RemainingSamples -= VI.AudioSamplesFromBytes(CopyBytes);
|
||||
|
||||
} while (RemainingSamples > 0 && DecodeCount > 0);
|
||||
}
|
||||
|
||||
class FFVideoSource : public FFVideoBase, private FFAVFormatBase {
|
||||
private:
|
||||
AVFrame *Frame;
|
||||
int CurrentFrame;
|
||||
int SeekMode;
|
||||
|
||||
int DecodeNextFrame(AVFrame *Frame, int64_t *DTS);
|
||||
public:
|
||||
FFVideoSource(const char *Source, int _Track, int _SeekMode, FILE *Timecodes, bool Cache, FILE *CacheFile, IScriptEnvironment* Env) : FFAVFormatBase(Source, _Track, CODEC_TYPE_VIDEO, Env) {
|
||||
CurrentFrame = 0;
|
||||
Frame = NULL;
|
||||
SeekMode = _SeekMode;
|
||||
|
||||
VI.image_type = VideoInfo::IT_TFF;
|
||||
VI.width = CodecContext->width;
|
||||
|
@ -456,7 +789,10 @@ public:
|
|||
av_free_packet(&Packet);
|
||||
}
|
||||
|
||||
av_seek_frame(FormatContext, Track, 0, AVSEEK_FLAG_BACKWARD);
|
||||
if (VI.num_frames == 0)
|
||||
Env->ThrowError("FFmpegSource: Video track contains no frames");
|
||||
|
||||
av_seek_frame(FormatContext, Track, FrameToDTS[0].DTS, AVSEEK_FLAG_BACKWARD);
|
||||
|
||||
if (Cache) {
|
||||
fprintf(CacheFile, "%d\n", VI.num_frames);
|
||||
|
@ -472,16 +808,14 @@ public:
|
|||
Frame = avcodec_alloc_frame();
|
||||
}
|
||||
|
||||
~FFmpegSource() {
|
||||
~FFVideoSource() {
|
||||
av_free(Frame);
|
||||
avcodec_close(CodecContext);
|
||||
av_close_input_file(FormatContext);
|
||||
}
|
||||
|
||||
PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* Env);
|
||||
};
|
||||
|
||||
int FFmpegSource::DecodeNextFrame(AVFrame *Frame, int64_t *DTS) {
|
||||
int FFVideoSource::DecodeNextFrame(AVFrame *Frame, int64_t *DTS) {
|
||||
AVPacket Packet;
|
||||
int FrameFinished = 0;
|
||||
int Ret = -1;
|
||||
|
@ -498,24 +832,31 @@ int FFmpegSource::DecodeNextFrame(AVFrame *Frame, int64_t *DTS) {
|
|||
av_free_packet(&Packet);
|
||||
|
||||
if (FrameFinished)
|
||||
break;
|
||||
goto Done;
|
||||
}
|
||||
|
||||
// Flush the last frame
|
||||
if (CurrentFrame == VI.num_frames - 1)
|
||||
Ret = avcodec_decode_video(CodecContext, Frame, &FrameFinished, NULL, 0);
|
||||
|
||||
Done:
|
||||
return Ret;
|
||||
}
|
||||
|
||||
PVideoFrame __stdcall FFmpegSource::GetFrame(int n, IScriptEnvironment* Env) {
|
||||
PVideoFrame __stdcall FFVideoSource::GetFrame(int n, IScriptEnvironment* Env) {
|
||||
bool HasSeeked = false;
|
||||
int ClosestKF = FindClosestKeyFrame(n);
|
||||
|
||||
if (SeekMode == 0) {
|
||||
if (n < CurrentFrame) {
|
||||
av_seek_frame(FormatContext, Track, 0, AVSEEK_FLAG_BACKWARD);
|
||||
av_seek_frame(FormatContext, Track, FrameToDTS[0].DTS, AVSEEK_FLAG_BACKWARD);
|
||||
avcodec_flush_buffers(CodecContext);
|
||||
CurrentFrame = 0;
|
||||
}
|
||||
} else {
|
||||
if (n < CurrentFrame || FindClosestKeyFrame(n) > CurrentFrame || (SeekMode == 3 && n > CurrentFrame + 10)) {
|
||||
av_seek_frame(FormatContext, Track, (SeekMode == 3) ? FrameToDTS[n].DTS : FrameToDTS[FindClosestKeyFrame(n)].DTS, AVSEEK_FLAG_BACKWARD);
|
||||
// 10 frames is used as a margin to prevent excessive seeking since the predicted best keyframe isn't always selected by avformat
|
||||
if (n < CurrentFrame || ClosestKF > CurrentFrame + 10 || (SeekMode == 3 && n > CurrentFrame + 10)) {
|
||||
av_seek_frame(FormatContext, Track, (SeekMode == 3) ? FrameToDTS[n].DTS : FrameToDTS[ClosestKF].DTS, AVSEEK_FLAG_BACKWARD);
|
||||
avcodec_flush_buffers(CodecContext);
|
||||
HasSeeked = true;
|
||||
}
|
||||
|
@ -525,6 +866,9 @@ PVideoFrame __stdcall FFmpegSource::GetFrame(int n, IScriptEnvironment* Env) {
|
|||
int64_t DTS;
|
||||
int Ret = DecodeNextFrame(Frame, &DTS);
|
||||
|
||||
if (SeekMode == 0 && Frame->key_frame)
|
||||
FrameToDTS[CurrentFrame].KeyFrame = true;
|
||||
|
||||
if (HasSeeked) {
|
||||
HasSeeked = false;
|
||||
|
||||
|
@ -532,7 +876,7 @@ PVideoFrame __stdcall FFmpegSource::GetFrame(int n, IScriptEnvironment* Env) {
|
|||
if (DTS < 0 || (CurrentFrame = FrameFromDTS(DTS)) < 0) {
|
||||
switch (SeekMode) {
|
||||
case 1:
|
||||
Env->ThrowError("FFmpegSource: Frame accurate seeking not possible in this file");
|
||||
Env->ThrowError("FFmpegSource: Frame accurate seeking is not possible in this file");
|
||||
case 2:
|
||||
case 3:
|
||||
CurrentFrame = ClosestFrameFromDTS(DTS);
|
||||
|
@ -549,20 +893,85 @@ PVideoFrame __stdcall FFmpegSource::GetFrame(int n, IScriptEnvironment* Env) {
|
|||
return OutputFrame(Frame, Env);
|
||||
}
|
||||
|
||||
AVSValue __cdecl CreateFFmpegSource(AVSValue Args, void* UserData, IScriptEnvironment* Env) {
|
||||
class FFAudioRefSource : public FFBase, private FFAVFormatBase {
|
||||
private:
|
||||
FILE *AudioCache;
|
||||
public:
|
||||
FFAudioRefSource(const char *Source, int _Track, const char *CacheFile, IScriptEnvironment* Env) : FFAVFormatBase(Source, _Track, CODEC_TYPE_AUDIO, Env) {
|
||||
switch (CodecContext->sample_fmt) {
|
||||
case SAMPLE_FMT_U8: VI.sample_type = SAMPLE_INT8; break;
|
||||
case SAMPLE_FMT_S16: VI.sample_type = SAMPLE_INT16; break;
|
||||
case SAMPLE_FMT_S24: VI.sample_type = SAMPLE_INT24; break;
|
||||
case SAMPLE_FMT_S32: VI.sample_type = SAMPLE_INT32; break;
|
||||
case SAMPLE_FMT_FLT: VI.sample_type = SAMPLE_FLOAT; break;
|
||||
default:
|
||||
Env->ThrowError("FFmpegSource: Unsupported/unknown sample format");
|
||||
}
|
||||
|
||||
VI.nchannels = CodecContext->channels;
|
||||
VI.audio_samples_per_second = CodecContext->sample_rate;
|
||||
|
||||
AudioCache = fopen(CacheFile, "ab+");
|
||||
if (AudioCache == NULL)
|
||||
Env->ThrowError("FFmpegSource: Failed to open the cache file");
|
||||
_fseeki64(AudioCache, 0, SEEK_END);
|
||||
int64_t CacheSize = _ftelli64(AudioCache);
|
||||
if (CacheSize > 0) {
|
||||
VI.num_audio_samples = VI.AudioSamplesFromBytes(CacheSize);
|
||||
} else {
|
||||
AVPacket Packet;
|
||||
uint8_t DecodingBuffer[AVCODEC_MAX_AUDIO_FRAME_SIZE];
|
||||
|
||||
while (av_read_frame(FormatContext, &Packet) >= 0) {
|
||||
if (Packet.stream_index == Track) {
|
||||
uint8_t *Data = (uint8_t *)Packet.data;
|
||||
int Size = Packet.size;
|
||||
|
||||
while (Size > 0) {
|
||||
int TempOutputBufSize = AVCODEC_MAX_AUDIO_FRAME_SIZE;
|
||||
int Ret = avcodec_decode_audio2(CodecContext, (int16_t *)DecodingBuffer, &TempOutputBufSize, Data, Size);
|
||||
if (Ret < 0) {
|
||||
av_free_packet(&Packet);
|
||||
Env->ThrowError("FFmpegSource: Audio decoding error");
|
||||
}
|
||||
|
||||
Size -= Ret;
|
||||
Data += Ret;
|
||||
VI.num_audio_samples += VI.AudioSamplesFromBytes(TempOutputBufSize);
|
||||
|
||||
fwrite(DecodingBuffer, 1, TempOutputBufSize, AudioCache);
|
||||
}
|
||||
}
|
||||
|
||||
av_free_packet(&Packet);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
~FFAudioRefSource() {
|
||||
fclose(AudioCache);
|
||||
}
|
||||
|
||||
void __stdcall GetAudio(void* Buf, __int64 Start, __int64 Count, IScriptEnvironment* Env) {
|
||||
_fseeki64(AudioCache, VI.BytesFromAudioSamples(Start), SEEK_SET);
|
||||
fread(Buf, 1, VI.BytesFromAudioSamples(Count), AudioCache);
|
||||
}
|
||||
};
|
||||
|
||||
AVSValue __cdecl CreateFFVideoSource(AVSValue Args, void* UserData, IScriptEnvironment* Env) {
|
||||
if (!Args[0].Defined())
|
||||
Env->ThrowError("FFmpegSource: No source specified");
|
||||
|
||||
// Generate default cache filename
|
||||
char DefaultCacheFilename[MAX_PATH];
|
||||
strcpy(DefaultCacheFilename, Args[0].AsString());
|
||||
strcat(DefaultCacheFilename, ".ffcache");
|
||||
|
||||
const char *Source = Args[0].AsString();
|
||||
int Track = Args[1].AsInt(-1);
|
||||
int SeekMode = Args[2].AsInt(1);
|
||||
const char *Timecodes = Args[3].AsString("");
|
||||
bool Cache = Args[4].AsBool(true);
|
||||
|
||||
// Generate default cache filename
|
||||
char DefaultCacheFilename[1024];
|
||||
strcpy(DefaultCacheFilename, Source);
|
||||
strcat(DefaultCacheFilename, ".ffcache");
|
||||
const char *CacheFilename = Args[5].AsString(DefaultCacheFilename);
|
||||
|
||||
if (SeekMode < 0 || SeekMode > 3)
|
||||
|
@ -597,7 +1006,7 @@ AVSValue __cdecl CreateFFmpegSource(AVSValue Args, void* UserData, IScriptEnviro
|
|||
if (IsMatroska)
|
||||
Ret = new FFMKVSource(Source, Track, TCFile, Cache, CacheFile, Env);
|
||||
else
|
||||
Ret = new FFmpegSource(Source, Track, SeekMode, TCFile, Cache, CacheFile, Env);
|
||||
Ret = new FFVideoSource(Source, Track, SeekMode, TCFile, Cache, CacheFile, Env);
|
||||
|
||||
if (TCFile)
|
||||
fclose(TCFile);
|
||||
|
@ -608,8 +1017,49 @@ AVSValue __cdecl CreateFFmpegSource(AVSValue Args, void* UserData, IScriptEnviro
|
|||
return Ret;
|
||||
}
|
||||
|
||||
AVSValue __cdecl CreateFFAudioSource(AVSValue Args, void* UserData, IScriptEnvironment* Env) {
|
||||
if (!Args[0].Defined())
|
||||
Env->ThrowError("FFmpegSource: No source specified");
|
||||
|
||||
const char *Source = Args[0].AsString();
|
||||
int Track = Args[1].AsInt(-1);
|
||||
|
||||
av_register_all();
|
||||
AVFormatContext *FormatContext;
|
||||
|
||||
if (av_open_input_file(&FormatContext, Source, NULL, 0, NULL) != 0)
|
||||
Env->ThrowError("FFmpegSource: Couldn't open \"%s\"", Source);
|
||||
bool IsMatroska = !strcmp(FormatContext->iformat->name, "matroska");
|
||||
av_close_input_file(FormatContext);
|
||||
|
||||
if (IsMatroska)
|
||||
return new FFMKASource(Source, Track, Env);
|
||||
else
|
||||
return new FFAudioSource(Source, Track, Env);
|
||||
}
|
||||
|
||||
AVSValue __cdecl CreateFFAudioRefSource(AVSValue Args, void* UserData, IScriptEnvironment* Env) {
|
||||
if (!Args[0].Defined())
|
||||
Env->ThrowError("FFmpegSource: No source specified");
|
||||
|
||||
const char *Source = Args[0].AsString();
|
||||
int Track = Args[1].AsInt(-1);
|
||||
|
||||
// Generate default cache filename
|
||||
char DefaultCacheFilename[1024];
|
||||
strcpy(DefaultCacheFilename, Source);
|
||||
strcat(DefaultCacheFilename, ".ffracache");
|
||||
const char *CacheFilename = Args[2].AsString(DefaultCacheFilename);
|
||||
|
||||
av_register_all();
|
||||
|
||||
return new FFAudioRefSource(Source, Track, CacheFilename, Env);
|
||||
}
|
||||
|
||||
extern "C" __declspec(dllexport) const char* __stdcall AvisynthPluginInit2(IScriptEnvironment* Env) {
|
||||
Env->AddFunction("FFmpegSource", "[source]s[track]i[seekmode]i[timecodes]s[cache]b[cachefile]s", CreateFFmpegSource, 0);
|
||||
Env->AddFunction("FFVideoSource", "[source]s[track]i[seekmode]i[timecodes]s[cache]b[cachefile]s", CreateFFVideoSource, 0);
|
||||
Env->AddFunction("FFAudioSource", "[source]s[track]i", CreateFFAudioSource, 0);
|
||||
Env->AddFunction("FFAudioRefSource", "[source]s[track]i[cachefile]s", CreateFFAudioRefSource, 0);
|
||||
return "FFmpegSource";
|
||||
};
|
||||
|
||||
|
|
|
@ -10,6 +10,15 @@ FFmpegSource Documentation
|
|||
<h2>Changes</h2>
|
||||
<ul>
|
||||
|
||||
<li>1.3<ul>
|
||||
<li>Compiled against ffmpeg rev9620</li>
|
||||
<li>Added FFAudioRefSource</li>
|
||||
<li>Added FFAudioSource (has big issues)</li>
|
||||
<li>Renamed FFmpegSource to FFVideoSource</li>
|
||||
<li>Adjusted seeking in the forward direction to only be done if the requested frame is more than 10 frames away to reduce unnecessary seeking</li>
|
||||
<li>Now outputs the last frame properly when there are decoding delays</li>
|
||||
</ul></li>
|
||||
|
||||
<li>1.2<ul>
|
||||
<li>Compiled against ffmpeg rev9451</li>
|
||||
<li>Somewhat cleaner source code</li>
|
||||
|
@ -29,7 +38,18 @@ FFmpegSource Documentation
|
|||
|
||||
<h2>Usage</h2>
|
||||
<p>
|
||||
<b>FFmpegSource(string source, int track = -1, int seekmode = 1, string timecodes, bool cache = true, string CacheFile)</b>
|
||||
<b>FFVideoSource(string source, int track = -1, int seekmode = 1, string timecodes, bool cache = true, string cachefile)</b><br />
|
||||
A video source that is frame accurate for most popular containers
|
||||
</p>
|
||||
|
||||
<p>
|
||||
<b>FFAudioSource(string source, int track = -1)</b><br />
|
||||
Very unreliable attempt at sample accurate seeking in audio files
|
||||
</p>
|
||||
|
||||
<p>
|
||||
<b>FFAudioRefSource(string source, int track = -1, string cachefile)</b><br />
|
||||
Decodes all audio to a temporary file which ensures that it will always be sample accurate
|
||||
</p>
|
||||
|
||||
<p>
|
||||
|
@ -39,7 +59,7 @@ FFmpegSource Documentation
|
|||
|
||||
<p>
|
||||
<b>track:</b>
|
||||
track number as seen by the relevant demuxer, starts from 0, -1 means will pick the first video track
|
||||
track number as seen by the relevant demuxer, starts from 0, -1 means it will pick the first suitable track
|
||||
</p>
|
||||
|
||||
<p>
|
||||
|
@ -63,19 +83,25 @@ FFmpegSource Documentation
|
|||
|
||||
<p>
|
||||
<b>cachefile:</b>
|
||||
if specified the file to store the index information in, if nothing is specified <source>.ffcache is used
|
||||
if specified the file to store the index information or raw audio in, if nothing is specified (source).ffcache is used for video and (source).ffracache for audio
|
||||
</p>
|
||||
|
||||
<h2>Compatibility</h2>
|
||||
<h2>Compatibility - Video</h2>
|
||||
<ul>
|
||||
<li>AVI, MKV, MP4, FLV: Frame accurate</li>
|
||||
<li>OGM: Messed up first frame and seeking produces smearing with seekmode=3, incredibly slow seeking without</li>
|
||||
<li>WMV: No seeking</li>
|
||||
<li>WMV: Frame accurate(?) but avformat seems to pick keyframes relatively far away</li>
|
||||
<li>OGM: Messed up first frame and seeking produces smearing with seekmode=3, incredibly slow seeking without, remux to mkv or avi</li>
|
||||
<li>VOB: No rff flags applied, frame accurate?</li>
|
||||
<li>MPG: Seeking seems to be off by one or two frames now and then</li>
|
||||
<li>TS: Anything except seekmode=0 is a complete waste of time</li>
|
||||
<li>TS: don't bother</li>
|
||||
</ul>
|
||||
|
||||
<h2>Compatibility - Audio</h2>
|
||||
<ul>
|
||||
<li>Not sample accurate ever?</li>
|
||||
</ul>
|
||||
|
||||
|
||||
<h2>Compiling</h2>
|
||||
|
||||
<p><b>zlib</b> from http://www.zlib.net/</p>
|
||||
|
@ -83,10 +109,10 @@ FFmpegSource Documentation
|
|||
<p><b>FFmpeg svn</b> from http://ffmpeg.mplayerhq.hu/</p>
|
||||
|
||||
<p><b>Required Configuration:</b>
|
||||
./configure --enable-shared --disable-static --enable-memalign-hack --enable-swscaler --enable-gpl</p>
|
||||
./configure --enable-shared --disable-static --enable-memalign-hack --enable-gpl --enable-swscaler</p>
|
||||
|
||||
<p><b>Suggested Additional Options:</b>
|
||||
--disable-encoders --disable-muxers</p>
|
||||
--disable-encoders --disable-muxers --enable-small</p>
|
||||
|
||||
</body>
|
||||
</html>
|
|
@ -1,7 +1,8 @@
|
|||
CodecID MatroskaToFFCodecID(TrackInfo *TI) {
|
||||
char *Codec = TI->CodecID;
|
||||
// fourcc list from ffdshow
|
||||
/* Video Codecs */
|
||||
if (!strcmp(Codec, "V_MS/VFW/FOURCC")) {
|
||||
// fourcc list from ffdshow
|
||||
switch (((BITMAPINFOHEADER *)TI->CodecPrivate)->biCompression) {
|
||||
case MAKEFOURCC('F', 'F', 'D', 'S'):
|
||||
case MAKEFOURCC('F', 'V', 'F', 'W'):
|
||||
|
@ -201,6 +202,37 @@
|
|||
default:
|
||||
return CODEC_ID_NONE;
|
||||
}
|
||||
/* Audio Codecs */
|
||||
} else if (!strcmp(Codec, "A_AC3"))
|
||||
return CODEC_ID_AC3;
|
||||
else if (!strcmp(Codec, "A_MPEG/L3"))
|
||||
return CODEC_ID_MP3;
|
||||
else if (!strcmp(Codec, "A_MPEG/L2"))
|
||||
return CODEC_ID_MP2;
|
||||
else if (!strcmp(Codec, "A_MPEG/L1"))
|
||||
return CODEC_ID_MP2; // correct?
|
||||
else if (!strcmp(Codec, "A_DTS"))
|
||||
return CODEC_ID_DTS;
|
||||
/*
|
||||
else if (!strcmp(Codec, "A_PCM/INT/LIT"))
|
||||
return CODEC_ID_PCM_S16LE;
|
||||
else if (!strcmp(Codec, "A_PCM/FLOAT/IEEE"))
|
||||
return CODEC_ID_PCM_S16LE;
|
||||
*/
|
||||
else if (!strcmp(Codec, "A_TTA1"))
|
||||
return CODEC_ID_TTA;
|
||||
else if (!strcmp(Codec, "A_WAVPACK4"))
|
||||
return CODEC_ID_WAVPACK;
|
||||
else if (!strcmp(Codec, "A_VORBIS"))
|
||||
return CODEC_ID_VORBIS;
|
||||
else if (!strncmp(Codec, "A_REAL/", 7)) {
|
||||
// not supported
|
||||
return CODEC_ID_NONE;
|
||||
} else if (!strncmp(Codec, "A_AAC", 5))
|
||||
return CODEC_ID_AAC;
|
||||
else if (!strcmp(Codec, "A_MS/ACM")) {
|
||||
// not supported
|
||||
return CODEC_ID_NONE;
|
||||
} else
|
||||
return CODEC_ID_NONE;
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue