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Aegisub/aegisub/FFmpegSource2/ffvideosource.cpp

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// Copyright (c) 2007-2008 Fredrik Mellbin
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include "ffvideosource.h"
#include <errno.h>
#ifdef __UNIX__
#define _snprintf snprintf
#endif
int VideoBase::InitPP(const char *PP, int PixelFormat, char *ErrorMsg, unsigned MsgSize) {
if (PP == NULL || !strcmp(PP, ""))
return 0;
PPMode = pp_get_mode_by_name_and_quality(PP, PP_QUALITY_MAX);
if (!PPMode) {
_snprintf(ErrorMsg, MsgSize, "Invalid postprocesing settings");
return 1;
}
int Flags = GetCPUFlags();
switch (PixelFormat) {
case PIX_FMT_YUV420P: Flags |= PP_FORMAT_420; break;
case PIX_FMT_YUV422P: Flags |= PP_FORMAT_422; break;
case PIX_FMT_YUV411P: Flags |= PP_FORMAT_411; break;
case PIX_FMT_YUV444P: Flags |= PP_FORMAT_444; break;
default:
_snprintf(ErrorMsg, MsgSize, "Input format is not supported for postprocessing");
return 2;
}
PPContext = pp_get_context(VP.Width, VP.Height, Flags);
if (!(PPFrame = avcodec_alloc_frame())) {
_snprintf(ErrorMsg, MsgSize, "Failed to allocate temporary frame");
return 3;
}
if (avpicture_alloc((AVPicture *)PPFrame, PixelFormat, VP.Width, VP.Height) < 0) {
av_free(PPFrame);
PPFrame = NULL;
_snprintf(ErrorMsg, MsgSize, "Failed to allocate picture");
return 4;
}
FinalFrame = PPFrame;
return 0;
}
AVFrameLite *VideoBase::OutputFrame(AVFrame *Frame) {
if (PPContext) {
pp_postprocess(const_cast<const uint8_t **>(Frame->data), Frame->linesize, PPFrame->data, PPFrame->linesize, VP.Width, VP.Height, Frame->qscale_table, Frame->qstride, PPMode, PPContext, Frame->pict_type | (Frame->qscale_type ? PP_PICT_TYPE_QP2 : 0));
PPFrame->key_frame = Frame->key_frame;
PPFrame->pict_type = Frame->pict_type;
}
if (SWS) {
sws_scale(SWS, PPFrame->data, PPFrame->linesize, 0, VP.Height, FinalFrame->data, FinalFrame->linesize);
FinalFrame->key_frame = PPFrame->key_frame;
FinalFrame->pict_type = PPFrame->pict_type;
}
return reinterpret_cast<AVFrameLite *>(FinalFrame);
}
VideoBase::VideoBase() {
memset(&VP, 0, sizeof(VP));
PPContext = NULL;
PPMode = NULL;
SWS = NULL;
LastFrameNum = -1;
CurrentFrame = 0;
CodecContext = NULL;
DecodeFrame = avcodec_alloc_frame();
PPFrame = DecodeFrame;
FinalFrame = PPFrame;
}
VideoBase::~VideoBase() {
if (PPMode)
pp_free_mode(PPMode);
if (PPContext)
pp_free_context(PPContext);
if (SWS)
sws_freeContext(SWS);
if (FinalFrame != PPFrame) {
avpicture_free((AVPicture *)FinalFrame);
av_free(FinalFrame);
}
if (PPFrame != DecodeFrame) {
avpicture_free((AVPicture *)PPFrame);
av_free(PPFrame);
}
av_free(DecodeFrame);
}
AVFrameLite *VideoBase::GetFrameByTime(double Time, char *ErrorMsg, unsigned MsgSize) {
int Frame = Frames.ClosestFrameFromDTS((Time * 1000 * Frames.TB.Den) / Frames.TB.Num);
return GetFrame(Frame, ErrorMsg, MsgSize);
}
int VideoBase::SetOutputFormat(int TargetFormats, int Width, int Height, char *ErrorMsg, unsigned MsgSize) {
// FIXME: investigate the possible bug in avcodec_find_best_pix_fmt
// int Loss;
// int OutputFormat = avcodec_find_best_pix_fmt(TargetFormats,
// CodecContext->pix_fmt, 1 /* Required to prevent pointless RGB32 => RGB24 conversion */, &Loss);
// if (OutputFormat == -1)
// return -1;
int OutputFormat = TargetFormats;
SwsContext *NewSWS = NULL;
if (CodecContext->pix_fmt != OutputFormat || Width != CodecContext->width || Height != CodecContext->height) {
NewSWS = sws_getContext(CodecContext->width, CodecContext->height, CodecContext->pix_fmt, Width, Height,
OutputFormat, GetCPUFlags() | SWS_BICUBIC, NULL, NULL, NULL);
if (NewSWS == NULL) {
_snprintf(ErrorMsg, MsgSize, "Failed to allocate SWScale context");
return 1;
}
}
if (SWS)
sws_freeContext(SWS);
SWS = NewSWS;
VP.Height = Height;
VP.Width = Width;
VP.PixelFormat = OutputFormat;
// FIXME: In theory the allocations in this part could fail just like in InitPP but whatever
if (FinalFrame != PPFrame) {
avpicture_free((AVPicture *)FinalFrame);
av_free(FinalFrame);
}
if (SWS) {
FinalFrame = avcodec_alloc_frame();
avpicture_alloc((AVPicture *)FinalFrame, VP.PixelFormat, VP.Width, VP.Height);
} else {
FinalFrame = PPFrame;
}
return 0;
}
void VideoBase::ResetOutputFormat() {
if (SWS)
sws_freeContext(SWS);
SWS = NULL;
VP.Height = CodecContext->height;
VP.Width = CodecContext->width;
VP.PixelFormat = CodecContext->pix_fmt;
}
void FFVideoSource::Free(bool CloseCodec) {
if (CloseCodec)
avcodec_close(CodecContext);
av_close_input_file(FormatContext);
// how was it allocated? how was it deallocate? nobody knows
//av_free(FormatContext);
}
FFVideoSource::FFVideoSource(const char *SourceFile, int Track, FrameIndex *TrackIndices,
const char *PP, int Threads, int SeekMode, char *ErrorMsg, unsigned MsgSize) {
FormatContext = NULL;
AVCodec *Codec = NULL;
this->SeekMode = SeekMode;
VideoTrack = Track;
Frames = (*TrackIndices)[VideoTrack];
if (Frames.size() == 0) {
_snprintf(ErrorMsg, MsgSize, "Video track contains no frames");
throw ErrorMsg;
}
if (av_open_input_file(&FormatContext, SourceFile, NULL, 0, NULL) != 0) {
_snprintf(ErrorMsg, MsgSize, "Couldn't open '%s'", SourceFile);
throw ErrorMsg;
}
if (av_find_stream_info(FormatContext) < 0) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Couldn't find stream information");
throw ErrorMsg;
}
if (SeekMode >= 0 && av_seek_frame(FormatContext, VideoTrack, Frames[0].DTS, AVSEEK_FLAG_BACKWARD) < 0) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Video track is unseekable");
throw ErrorMsg;
}
CodecContext = FormatContext->streams[VideoTrack]->codec;
CodecContext->thread_count = Threads;
Codec = avcodec_find_decoder(CodecContext->codec_id);
if (Codec == NULL) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Video codec not found");
throw ErrorMsg;
}
if (avcodec_open(CodecContext, Codec) < 0) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Could not open video codec");
throw ErrorMsg;
}
// Always try to decode a frame to make sure all required parameters are known
int64_t Dummy;
if (DecodeNextFrame(DecodeFrame, &Dummy, ErrorMsg, MsgSize)) {
Free(true);
throw ErrorMsg;
}
//VP.image_type = VideoInfo::IT_TFF;
VP.Width = CodecContext->width;
VP.Height = CodecContext->height;
VP.FPSDenominator = FormatContext->streams[VideoTrack]->time_base.num;
VP.FPSNumerator = FormatContext->streams[VideoTrack]->time_base.den;
VP.NumFrames = Frames.size();
VP.PixelFormat = CodecContext->pix_fmt;
VP.FirstTime = ((Frames.front().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
VP.LastTime = ((Frames.back().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
if (VP.Width <= 0 || VP.Height <= 0) {
Free(true);
_snprintf(ErrorMsg, MsgSize, "Codec returned zero size video");
throw ErrorMsg;
}
// sanity check framerate
if (VP.FPSDenominator > VP.FPSNumerator || VP.FPSDenominator <= 0 || VP.FPSNumerator <= 0) {
VP.FPSDenominator = 1;
VP.FPSNumerator = 30;
}
if (InitPP(PP, CodecContext->pix_fmt, ErrorMsg, MsgSize)) {
Free(true);
throw ErrorMsg;
}
// Adjust framerate to match the duration of the first frame
if (Frames.size() >= 2) {
unsigned int DTSDiff = (unsigned int)FFMAX(Frames[1].DTS - Frames[0].DTS, 1);
VP.FPSDenominator *= DTSDiff;
}
// Cannot "output" to PPFrame without doing all other initialization
// This is the additional mess required for seekmode=-1 to work in a reasonable way
OutputFrame(DecodeFrame);
LastFrameNum = 0;
// Set AR variables
VP.SARNum = CodecContext->sample_aspect_ratio.num;
VP.SARDen = CodecContext->sample_aspect_ratio.den;
}
FFVideoSource::~FFVideoSource() {
Free(true);
}
int FFVideoSource::DecodeNextFrame(AVFrame *AFrame, int64_t *AStartTime, char *ErrorMsg, unsigned MsgSize) {
AVPacket Packet;
int FrameFinished = 0;
*AStartTime = -1;
while (av_read_frame(FormatContext, &Packet) >= 0) {
if (Packet.stream_index == VideoTrack) {
if (*AStartTime < 0)
*AStartTime = Packet.dts;
avcodec_decode_video(CodecContext, AFrame, &FrameFinished, Packet.data, Packet.size);
}
av_free_packet(&Packet);
if (FrameFinished)
goto Done;
}
// Flush the last frames
if (CodecContext->has_b_frames)
avcodec_decode_video(CodecContext, AFrame, &FrameFinished, NULL, 0);
if (!FrameFinished)
goto Error;
// Ignore errors for now
Error:
Done:
return 0;
}
AVFrameLite *FFVideoSource::GetFrame(int n, char *ErrorMsg, unsigned MsgSize) {
// PPFrame always holds frame LastFrameNum even if no PP is applied
if (LastFrameNum == n)
return OutputFrame(DecodeFrame);
bool HasSeeked = false;
if (SeekMode >= 0) {
int ClosestKF = Frames.FindClosestKeyFrame(n);
if (SeekMode == 0) {
if (n < CurrentFrame) {
av_seek_frame(FormatContext, VideoTrack, Frames[0].DTS, AVSEEK_FLAG_BACKWARD);
avcodec_flush_buffers(CodecContext);
CurrentFrame = 0;
}
} else {
// 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, VideoTrack, (SeekMode == 3) ? Frames[n].DTS : Frames[ClosestKF].DTS, AVSEEK_FLAG_BACKWARD);
avcodec_flush_buffers(CodecContext);
HasSeeked = true;
}
}
} else if (n < CurrentFrame) {
_snprintf(ErrorMsg, MsgSize, "Non-linear access attempted");
return NULL;
}
do {
int64_t StartTime;
if (DecodeNextFrame(DecodeFrame, &StartTime, ErrorMsg, MsgSize))
return NULL;
if (HasSeeked) {
HasSeeked = false;
// Is the seek destination time known? Does it belong to a frame?
if (StartTime < 0 || (CurrentFrame = Frames.FrameFromDTS(StartTime)) < 0) {
switch (SeekMode) {
case 1:
_snprintf(ErrorMsg, MsgSize, "Frame accurate seeking is not possible in this file");
return NULL;
case 2:
case 3:
CurrentFrame = Frames.ClosestFrameFromDTS(StartTime);
break;
default:
_snprintf(ErrorMsg, MsgSize, "Failed assertion");
return NULL;
}
}
}
CurrentFrame++;
} while (CurrentFrame <= n);
LastFrameNum = n;
return OutputFrame(DecodeFrame);
}
void MatroskaVideoSource::Free(bool CloseCodec) {
if (CS)
cs_Destroy(CS);
if (MC.ST.fp) {
mkv_Close(MF);
fclose(MC.ST.fp);
}
if (CloseCodec)
avcodec_close(CodecContext);
av_free(CodecContext);
}
MatroskaVideoSource::MatroskaVideoSource(const char *SourceFile, int Track,
FrameIndex *TrackIndices, const char *PP,
int Threads, char *ErrorMsg, unsigned MsgSize) {
AVCodec *Codec = NULL;
CodecContext = NULL;
TrackInfo *TI = NULL;
CS = NULL;
VideoTrack = Track;
Frames = (*TrackIndices)[VideoTrack];
if (Frames.size() == 0) {
_snprintf(ErrorMsg, MsgSize, "Video track contains no frames");
throw ErrorMsg;
}
MC.ST.fp = fopen(SourceFile, "rb");
if (MC.ST.fp == NULL) {
_snprintf(ErrorMsg, MsgSize, "Can't open '%s': %s", SourceFile, strerror(errno));
throw ErrorMsg;
}
setvbuf(MC.ST.fp, NULL, _IOFBF, CACHESIZE);
MF = mkv_OpenEx(&MC.ST.base, 0, 0, ErrorMessage, sizeof(ErrorMessage));
if (MF == NULL) {
fclose(MC.ST.fp);
_snprintf(ErrorMsg, MsgSize, "Can't parse Matroska file: %s", ErrorMessage);
throw ErrorMsg;
}
mkv_SetTrackMask(MF, ~(1 << VideoTrack));
TI = mkv_GetTrackInfo(MF, VideoTrack);
if (TI->CompEnabled) {
CS = cs_Create(MF, VideoTrack, ErrorMessage, sizeof(ErrorMessage));
if (CS == NULL) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Can't create decompressor: %s", ErrorMessage);
throw ErrorMsg;
}
}
CodecContext = avcodec_alloc_context();
CodecContext->extradata = (uint8_t *)TI->CodecPrivate;
CodecContext->extradata_size = TI->CodecPrivateSize;
CodecContext->thread_count = Threads;
Codec = avcodec_find_decoder(MatroskaToFFCodecID(TI->CodecID, TI->CodecPrivate));
if (Codec == NULL) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Video codec not found");
throw ErrorMsg;
}
if (avcodec_open(CodecContext, Codec) < 0) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Could not open video codec");
throw ErrorMsg;
}
// Always try to decode a frame to make sure all required parameters are known
int64_t Dummy;
if (DecodeNextFrame(DecodeFrame, &Dummy, ErrorMsg, MsgSize)) {
Free(true);
throw ErrorMsg;
}
VP.Width = CodecContext->width;
VP.Height = CodecContext->height;;
VP.FPSDenominator = 1;
VP.FPSNumerator = 30;
VP.NumFrames = Frames.size();
VP.PixelFormat = CodecContext->pix_fmt;
VP.FirstTime = ((Frames.front().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
VP.LastTime = ((Frames.back().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
if (VP.Width <= 0 || VP.Height <= 0) {
Free(true);
_snprintf(ErrorMsg, MsgSize, "Codec returned zero size video");
throw ErrorMsg;
}
if (InitPP(PP, CodecContext->pix_fmt, ErrorMsg, MsgSize)) {
Free(true);
throw ErrorMsg;
}
// Calculate the average framerate
if (Frames.size() >= 2) {
double DTSDiff = (double)(Frames.back().DTS - Frames.front().DTS);
VP.FPSDenominator = (unsigned int)(DTSDiff * mkv_TruncFloat(TI->TimecodeScale) / (double)1000 / (double)(VP.NumFrames - 1) + 0.5);
VP.FPSNumerator = 1000000;
}
// Output the already decoded frame so it isn't wasted
OutputFrame(DecodeFrame);
LastFrameNum = 0;
// Set AR variables
VP.SARNum = TI->AV.Video.DisplayWidth * TI->AV.Video.PixelHeight;
VP.SARDen = TI->AV.Video.DisplayHeight * TI->AV.Video.PixelWidth;
// Set crop variables
VP.CropLeft = TI->AV.Video.CropL;
VP.CropRight = TI->AV.Video.CropR;
VP.CropTop = TI->AV.Video.CropT;
VP.CropBottom = TI->AV.Video.CropB;
}
MatroskaVideoSource::~MatroskaVideoSource() {
Free(true);
}
int MatroskaVideoSource::DecodeNextFrame(AVFrame *AFrame, int64_t *AFirstStartTime, char *ErrorMsg, unsigned MsgSize) {
int FrameFinished = 0;
*AFirstStartTime = -1;
ulonglong StartTime, EndTime, FilePos;
unsigned int Track, FrameFlags, FrameSize;
while (mkv_ReadFrame(MF, 0, &Track, &StartTime, &EndTime, &FilePos, &FrameSize, &FrameFlags) == 0) {
if (*AFirstStartTime < 0)
*AFirstStartTime = StartTime;
if (ReadFrame(FilePos, FrameSize, CS, MC, ErrorMsg, MsgSize))
return 1;
avcodec_decode_video(CodecContext, AFrame, &FrameFinished, MC.Buffer, FrameSize);
if (FrameFinished)
goto Done;
}
// Flush the last frames
if (CodecContext->has_b_frames)
avcodec_decode_video(CodecContext, AFrame, &FrameFinished, NULL, 0);
if (!FrameFinished)
goto Error;
Error:
Done:
return 0;
}
AVFrameLite *MatroskaVideoSource::GetFrame(int n, char *ErrorMsg, unsigned MsgSize) {
// PPFrame always holds frame LastFrameNum even if no PP is applied
if (LastFrameNum == n)
return OutputFrame(DecodeFrame);
bool HasSeeked = false;
if (n < CurrentFrame || Frames.FindClosestKeyFrame(n) > CurrentFrame) {
mkv_Seek(MF, Frames[n].DTS, MKVF_SEEK_TO_PREV_KEYFRAME);
avcodec_flush_buffers(CodecContext);
HasSeeked = true;
}
do {
int64_t StartTime;
if (DecodeNextFrame(DecodeFrame, &StartTime, ErrorMsg, MsgSize))
return NULL;
if (HasSeeked) {
HasSeeked = false;
if (StartTime < 0 || (CurrentFrame = Frames.FrameFromDTS(StartTime)) < 0) {
_snprintf(ErrorMsg, MsgSize, "Frame accurate seeking is not possible in this file");
return NULL;
}
}
CurrentFrame++;
} while (CurrentFrame <= n);
LastFrameNum = n;
return OutputFrame(DecodeFrame);
}
#ifdef HAALITS
void HaaliTSVideoSource::Free(bool CloseCodec) {
if (CloseCodec)
avcodec_close(CodecContext);
av_free(CodecContext);
}
HaaliTSVideoSource::HaaliTSVideoSource(const char *SourceFile, int Track,
FrameIndex *TrackIndices, const char *PP,
int Threads, char *ErrorMsg, unsigned MsgSize) {
AVCodec *Codec = NULL;
CodecContext = NULL;
VideoTrack = Track;
Frames = (*TrackIndices)[VideoTrack];
if (Frames.size() == 0) {
_snprintf(ErrorMsg, MsgSize, "Video track contains no frames");
throw ErrorMsg;
}
::CoInitializeEx(NULL, COINIT_MULTITHREADED);
CLSID clsid = Haali_TS_Parser;
if (FAILED(pMMC.CoCreateInstance(clsid))) {
_snprintf(ErrorMsg, MsgSize, "Can't create parser");
throw ErrorMsg;
}
CComPtr<IMemAlloc> pMA;
if (FAILED(pMA.CoCreateInstance(CLSID_MemAlloc))) {
_snprintf(ErrorMsg, MsgSize, "Can't create memory allocator");
throw ErrorMsg;
}
CComPtr<IMMStream> pMS;
if (FAILED(pMS.CoCreateInstance(CLSID_DiskFile))) {
_snprintf(ErrorMsg, MsgSize, "Can't create disk file reader");
throw ErrorMsg;
}
WCHAR WSourceFile[2048];
mbstowcs(WSourceFile, SourceFile, 2000);
CComQIPtr<IMMStreamOpen> pMSO(pMS);
if (FAILED(pMSO->Open(WSourceFile))) {
_snprintf(ErrorMsg, MsgSize, "Can't open file");
throw ErrorMsg;
}
if (FAILED(pMMC->Open(pMS, 0, NULL, pMA))) {
_snprintf(ErrorMsg, MsgSize, "Can't parse file");
throw ErrorMsg;
}
BSTR CodecID = NULL;
uint8_t * CodecPrivate = NULL;
int CodecPrivateSize = 0;
int CurrentTrack = 0;
CComPtr<IEnumUnknown> pEU;
if (SUCCEEDED(pMMC->EnumTracks(&pEU))) {
CComPtr<IUnknown> pU;
while (pEU->Next(1, &pU, NULL) == S_OK) {
if (CurrentTrack++ == Track) {
CComQIPtr<IPropertyBag> pBag = pU;
if (pBag) {
VARIANT pV;
pV.vt = VT_EMPTY;
if (pBag->Read(L"CodecID", &pV, NULL) == S_OK)
CodecID = pV.bstrVal;
pV.vt = VT_EMPTY;
if (pBag->Read(L"CodecPrivate", &pV, NULL) == S_OK) {
CodecPrivate = (uint8_t *)pV.parray->pvData;
CodecPrivateSize = pV.parray->cbElements;
}
}
}
pU = NULL;
}
}
CodecContext = avcodec_alloc_context();
CodecContext->extradata = CodecPrivate;
CodecContext->extradata_size = CodecPrivateSize;
CodecContext->thread_count = Threads;
char ACodecID[2048];
wcstombs(ACodecID, CodecID, 2000);
Codec = avcodec_find_decoder(MatroskaToFFCodecID(ACodecID, CodecPrivate));
if (Codec == NULL) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Video codec not found");
throw ErrorMsg;
}
if (avcodec_open(CodecContext, Codec) < 0) {
Free(false);
_snprintf(ErrorMsg, MsgSize, "Could not open video codec");
throw ErrorMsg;
}
// Always try to decode a frame to make sure all required parameters are known
int64_t Dummy;
if (DecodeNextFrame(DecodeFrame, &Dummy, ErrorMsg, MsgSize)) {
Free(true);
throw ErrorMsg;
}
VP.Width = CodecContext->width;
VP.Height = CodecContext->height;;
VP.FPSDenominator = 1;
VP.FPSNumerator = 30;
VP.NumFrames = Frames.size();
VP.PixelFormat = CodecContext->pix_fmt;
VP.FirstTime = ((Frames.front().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
VP.LastTime = ((Frames.back().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
if (VP.Width <= 0 || VP.Height <= 0) {
Free(true);
_snprintf(ErrorMsg, MsgSize, "Codec returned zero size video");
throw ErrorMsg;
}
if (InitPP(PP, CodecContext->pix_fmt, ErrorMsg, MsgSize)) {
Free(true);
throw ErrorMsg;
}
// Calculate the average framerate
if (Frames.size() >= 2) {
double DTSDiff = (double)(Frames.back().DTS - Frames.front().DTS);
// FIXME
VP.FPSDenominator = (unsigned int)((DTSDiff * 1000000000) / (double)1000 / (double)(VP.NumFrames - 1) + 0.5);
VP.FPSNumerator = 1000000;
}
// Output the already decoded frame so it isn't wasted
OutputFrame(DecodeFrame);
LastFrameNum = 0;
// Set AR variables
// VP.SARNum = TI->AV.Video.DisplayWidth * TI->AV.Video.PixelHeight;
// VP.SARDen = TI->AV.Video.DisplayHeight * TI->AV.Video.PixelWidth;
// Set crop variables
// VP.CropLeft = TI->AV.Video.CropL;
// VP.CropRight = TI->AV.Video.CropR;
// VP.CropTop = TI->AV.Video.CropT;
// VP.CropBottom = TI->AV.Video.CropB;
}
HaaliTSVideoSource::~HaaliTSVideoSource() {
Free(true);
}
int HaaliTSVideoSource::DecodeNextFrame(AVFrame *AFrame, int64_t *AFirstStartTime, char *ErrorMsg, unsigned MsgSize) {
int FrameFinished = 0;
*AFirstStartTime = -1;
for (;;) {
CComPtr<IMMFrame> pMMF;
if (pMMC->ReadFrame(NULL, &pMMF) != S_OK)
break;
REFERENCE_TIME Ts, Te;
if (*AFirstStartTime < 0 && SUCCEEDED(pMMF->GetTime(&Ts, &Te)))
*AFirstStartTime = Ts;
if (pMMF->GetTrack() == VideoTrack) {
BYTE *Data = NULL;
if (FAILED(pMMF->GetPointer(&Data)))
goto Error;
avcodec_decode_video(CodecContext, AFrame, &FrameFinished, Data, pMMF->GetActualDataLength());
if (FrameFinished)
goto Done;
}
}
// Flush the last frames
if (CodecContext->has_b_frames)
avcodec_decode_video(CodecContext, AFrame, &FrameFinished, NULL, 0);
if (!FrameFinished)
goto Error;
Error:
Done:
return 0;
}
AVFrameLite *HaaliTSVideoSource::GetFrame(int n, char *ErrorMsg, unsigned MsgSize) {
// PPFrame always holds frame LastFrameNum even if no PP is applied
if (LastFrameNum == n)
return OutputFrame(DecodeFrame);
bool HasSeeked = false;
if (n < CurrentFrame || Frames.FindClosestKeyFrame(n) > CurrentFrame) {
int64_t dtsp = Frames[n].DTS;
pMMC->Seek(Frames[n].DTS, MMSF_PREV_KF);
// FIXME for some reason required to make it seek properly
//avcodec_flush_buffers(CodecContext);
HasSeeked = true;
}
do {
int64_t StartTime;
if (DecodeNextFrame(DecodeFrame, &StartTime, ErrorMsg, MsgSize))
return NULL;
if (HasSeeked) {
HasSeeked = false;
if (StartTime < 0 || (CurrentFrame = Frames.FrameFromDTS(StartTime)) < 0) {
_snprintf(ErrorMsg, MsgSize, "Frame accurate seeking is not possible in this file\n");
return NULL;
}
}
CurrentFrame++;
} while (CurrentFrame <= n);
LastFrameNum = n;
return OutputFrame(DecodeFrame);
}
#endif // HAALITS
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