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Aegisub/FFmpegSource2/indexing.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 <iostream>
#include <fstream>
#include <set>
#include <algorithm>
#include <memory>
#include <errno.h>
#include "indexing.h"
#include "wave64writer.h"
extern "C" {
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
#include "MatroskaParser.h"
#include "stdiostream.h"
}
#ifdef _WIN32
# define _WIN32_DCOM
# include <windows.h>
# include <tchar.h>
# include <atlbase.h>
# include <dshow.h>
# include "CoParser.h"
# include <initguid.h>
# include "guids.h"
#endif
class MatroskaAudioContext {
public:
Wave64Writer *W64W;
AVCodecContext *CTX;
CompressedStream *CS;
int64_t CurrentSample;
MatroskaAudioContext() {
W64W = NULL;
CTX = NULL;
CS = NULL;
CurrentSample = 0;
}
~MatroskaAudioContext() {
delete W64W;
if (CTX) {
avcodec_close(CTX);
av_free(CTX);
}
if (CS)
cs_Destroy(CS);
}
};
class FFAudioContext {
public:
Wave64Writer *W64W;
AVCodecContext *CTX;
int64_t CurrentSample;
FFAudioContext() {
W64W = NULL;
CTX = NULL;
CurrentSample = 0;
}
~FFAudioContext() {
delete W64W;
if (CTX)
avcodec_close(CTX);
}
};
#ifdef HAALITS
class HaaliTSIndexMemory {
private:
int16_t *DecodingBuffer;
MatroskaAudioContext *AudioContexts;
public:
HaaliTSIndexMemory(int Tracks, int16_t *&DecodingBuffer, MatroskaAudioContext *&AudioContexts) {
DecodingBuffer = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE*10];
AudioContexts = new MatroskaAudioContext[Tracks];
this->DecodingBuffer = DecodingBuffer;
this->AudioContexts = AudioContexts;
}
~HaaliTSIndexMemory() {
delete [] DecodingBuffer;
delete [] AudioContexts;
}
};
#endif
class MatroskaIndexMemory {
private:
int16_t *DecodingBuffer;
MatroskaAudioContext *AudioContexts;
MatroskaFile *MF;
MatroskaReaderContext *MC;
public:
MatroskaIndexMemory(int Tracks, int16_t *&DecodingBuffer, MatroskaAudioContext *&AudioContexts, MatroskaFile *MF, MatroskaReaderContext *MC) {
DecodingBuffer = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE*10];
AudioContexts = new MatroskaAudioContext[Tracks];
this->DecodingBuffer = DecodingBuffer;
this->AudioContexts = AudioContexts;
this->MF = MF;
this->MC = MC;
}
~MatroskaIndexMemory() {
delete [] DecodingBuffer;
delete [] AudioContexts;
mkv_Close(MF);
fclose(MC->ST.fp);
}
};
class FFIndexMemory {
private:
int16_t *DecodingBuffer;
FFAudioContext *AudioContexts;
AVFormatContext *FormatContext;
public:
FFIndexMemory(int Tracks, int16_t *&DecodingBuffer, FFAudioContext *&AudioContexts, AVFormatContext *&FormatContext) {
DecodingBuffer = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE*10];
AudioContexts = new FFAudioContext[Tracks];
this->DecodingBuffer = DecodingBuffer;
this->AudioContexts = AudioContexts;
this->FormatContext = FormatContext;
}
~FFIndexMemory() {
delete [] DecodingBuffer;
delete [] AudioContexts;
av_close_input_file(FormatContext);
}
};
static bool DTSComparison(FrameInfo FI1, FrameInfo FI2) {
return FI1.DTS < FI2.DTS;
}
static void SortTrackIndices(FrameIndex *TrackIndices) {
for (FrameIndex::iterator Cur=TrackIndices->begin(); Cur!=TrackIndices->end(); Cur++)
std::sort(Cur->begin(), Cur->end(), DTSComparison);
}
int WriteIndex(const char *IndexFile, FrameIndex *TrackIndices, char *ErrorMsg, unsigned MsgSize) {
std::ofstream Index(IndexFile, std::ios::out | std::ios::binary | std::ios::trunc);
if (!Index.is_open()) {
_snprintf(ErrorMsg, MsgSize, "Failed to open '%s' for writing", IndexFile);
return 1;
}
// Write the index file header
IndexHeader IH;
IH.Id = INDEXID;
IH.Version = INDEXVERSION;
IH.Tracks = TrackIndices->size();
IH.Decoder = TrackIndices->Decoder;
Index.write(reinterpret_cast<char *>(&IH), sizeof(IH));
for (unsigned int i = 0; i < IH.Tracks; i++) {
int TT = (*TrackIndices)[i].TT;
Index.write(reinterpret_cast<char *>(&TT), sizeof(TT));
int Num = (*TrackIndices)[i].TB.Num;
Index.write(reinterpret_cast<char *>(&Num), sizeof(Num));
int Den = (*TrackIndices)[i].TB.Den;
Index.write(reinterpret_cast<char *>(&Den), sizeof(Den));
size_t Frames = (*TrackIndices)[i].size();
Index.write(reinterpret_cast<char *>(&Frames), sizeof(Frames));
for (size_t j = 0; j < Frames; j++)
Index.write(reinterpret_cast<char *>(&(TrackIndices->at(i)[j])), sizeof(FrameInfo));
}
return 0;
}
#ifdef HAALITS
static FrameIndex *MakeHaaliTSIndex(const char *SourceFile, int IndexMask, int DumpMask, const char *AudioFile, bool IgnoreDecodeErrors, IndexCallback IP, void *Private, char *ErrorMsg, unsigned MsgSize) {
::CoInitializeEx(NULL, COINIT_MULTITHREADED);
CLSID clsid = Haali_TS_Parser;
CComPtr<IMMContainer> pMMC;
if (FAILED(pMMC.CoCreateInstance(clsid))) {
_snprintf(ErrorMsg, MsgSize, "Can't create parser");
return NULL;
}
CComPtr<IMemAlloc> pMA;
if (FAILED(pMA.CoCreateInstance(CLSID_MemAlloc))) {
_snprintf(ErrorMsg, MsgSize, "Can't create memory allocator");
return NULL;
}
CComPtr<IMMStream> pMS;
if (FAILED(pMS.CoCreateInstance(CLSID_DiskFile))) {
_snprintf(ErrorMsg, MsgSize, "Can't create disk file reader");
return NULL;
}
WCHAR WSourceFile[2048];
mbstowcs(WSourceFile, SourceFile, 2000);
CComQIPtr<IMMStreamOpen> pMSO(pMS);
if (FAILED(pMSO->Open(WSourceFile))) {
_snprintf(ErrorMsg, MsgSize, "Can't open file");
return NULL;
}
if (FAILED(pMMC->Open(pMS, 0, NULL, pMA))) {
_snprintf(ErrorMsg, MsgSize, "Can't parse file");
return NULL;
}
int NumTracks = 0;
CComPtr<IEnumUnknown> pEU;
if (SUCCEEDED(pMMC->EnumTracks(&pEU))) {
CComPtr<IUnknown> pU;
while (pEU->Next(1, &pU, NULL) == S_OK) {
NumTracks++;
pU = NULL;
}
}
// Audio stuff
int16_t *db;
MatroskaAudioContext *AudioContexts;
HaaliTSIndexMemory IM = HaaliTSIndexMemory(NumTracks, db, AudioContexts);
FrameIndex *TrackIndices = new FrameIndex();
TrackIndices->Decoder = 2;
int TrackTypes[32];
int CurrentTrack = 0;
pEU = NULL;
if (SUCCEEDED(pMMC->EnumTracks(&pEU))) {
CComPtr<IUnknown> pU;
while (pEU->Next(1, &pU, NULL) == S_OK) {
CComQIPtr<IPropertyBag> pBag = pU;
BSTR CodecID = NULL;
TrackTypes[CurrentTrack] = -200;
uint8_t * CodecPrivate = NULL;
int CodecPrivateSize = 0;
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"Type", &pV, NULL) == S_OK)
TrackTypes[CurrentTrack] = pV.uintVal;
pV.vt = VT_EMPTY;
if (pBag->Read(L"CodecPrivate", &pV, NULL) == S_OK) {
CodecPrivate = (uint8_t *)pV.parray->pvData;
CodecPrivateSize = pV.parray->cbElements;
}
}
TrackIndices->push_back(FrameInfoVector(1, 1000000000, TrackTypes[CurrentTrack] - 1));
if (IndexMask & (1 << CurrentTrack) && TrackTypes[CurrentTrack] == TT_AUDIO) {
AVCodecContext *AudioCodecContext = avcodec_alloc_context();
AudioCodecContext->extradata = CodecPrivate;
AudioCodecContext->extradata_size = CodecPrivateSize;
AudioContexts[CurrentTrack].CTX = AudioCodecContext;
char ACodecID[2048];
wcstombs(ACodecID, CodecID, 2000);
AVCodec *AudioCodec = avcodec_find_decoder(MatroskaToFFCodecID(ACodecID, NULL));
if (AudioCodec == NULL) {
av_free(AudioCodecContext);
AudioContexts[CurrentTrack].CTX = NULL;
_snprintf(ErrorMsg, MsgSize, "Audio codec not found");
return NULL;
}
if (avcodec_open(AudioCodecContext, AudioCodec) < 0) {
av_free(AudioCodecContext);
AudioContexts[CurrentTrack].CTX = NULL;
_snprintf(ErrorMsg, MsgSize, "Could not open audio codec");
return NULL;
}
} else {
IndexMask &= ~(1 << CurrentTrack);
}
pU = NULL;
CurrentTrack++;
}
}
//
for (;;) {
if (IP) {
if ((*IP)(0, 0, 1, Private)) {
_snprintf(ErrorMsg, MsgSize, "Cancelled by user");
delete TrackIndices;
return NULL;
}
}
CComPtr<IMMFrame> pMMF;
if (pMMC->ReadFrame(NULL, &pMMF) != S_OK)
break;
REFERENCE_TIME Ts, Te;
HRESULT hr = pMMF->GetTime(&Ts, &Te);
unsigned int CurrentTrack = pMMF->GetTrack();
// Only create index entries for video for now to save space
if (TrackTypes[CurrentTrack] == TT_VIDEO) {
(*TrackIndices)[CurrentTrack].push_back(FrameInfo(Ts, pMMF->IsSyncPoint() == S_OK));
} else if (TrackTypes[CurrentTrack] == TT_AUDIO && (IndexMask & (1 << CurrentTrack))) {
/* (*TrackIndices)[Track].push_back(FrameInfo(AudioContexts[Track].CurrentSample, FilePos, FrameSize, (FrameFlags & FRAME_KF) != 0));
ReadFrame(FilePos, FrameSize, AudioContexts[Track].CS, MC, ErrorMsg, MsgSize);
int Size = FrameSize;
uint8_t *Data = MC.Buffer;
AVCodecContext *AudioCodecContext = AudioContexts[Track].CTX;
while (Size > 0) {
int dbsize = AVCODEC_MAX_AUDIO_FRAME_SIZE*10;
int Ret = avcodec_decode_audio2(AudioCodecContext, db, &dbsize, Data, Size);
if (Ret < 0) {
if (IgnoreDecodeErrors) {
(*TrackIndices)[Track].clear();
IndexMask &= ~(1 << Track);
break;
} else {
_snprintf(ErrorMsg, MsgSize, "Audio decoding error");
delete TrackIndices;
return NULL;
}
}
if (Ret > 0) {
Size -= Ret;
Data += Ret;
}
if (dbsize > 0)
AudioContexts[Track].CurrentSample += (dbsize * 8) / (av_get_bits_per_sample_format(AudioCodecContext->sample_fmt) * AudioCodecContext->channels);
if (dbsize > 0 && (DumpMask & (1 << Track))) {
// Delay writer creation until after an audio frame has been decoded. This ensures that all parameters are known when writing the headers.
if (!AudioContexts[Track].W64W) {
char ABuf[50];
std::string WN(AudioFile);
int Offset = StartTime * mkv_TruncFloat(mkv_GetTrackInfo(MF, Track)->TimecodeScale) / (double)1000000;
_snprintf(ABuf, sizeof(ABuf), ".%02d.delay.%d.w64", Track, Offset);
WN += ABuf;
AudioContexts[Track].W64W = new Wave64Writer(WN.c_str(), av_get_bits_per_sample_format(AudioCodecContext->sample_fmt),
AudioCodecContext->channels, AudioCodecContext->sample_rate, AudioFMTIsFloat(AudioCodecContext->sample_fmt));
}
AudioContexts[Track].W64W->WriteData(db, dbsize);
}
}
*/
}
}
SortTrackIndices(TrackIndices);
return TrackIndices;
}
#endif
static FrameIndex *MakeMatroskaIndex(const char *SourceFile, int IndexMask, int DumpMask, const char *AudioFile, bool IgnoreDecodeErrors, IndexCallback IP, void *Private, char *ErrorMsg, unsigned MsgSize) {
MatroskaFile *MF;
char ErrorMessage[256];
MatroskaReaderContext MC;
MC.Buffer = NULL;
MC.BufferSize = 0;
InitStdIoStream(&MC.ST);
MC.ST.fp = fopen(SourceFile, "rb");
if (MC.ST.fp == NULL) {
_snprintf(ErrorMsg, MsgSize, "Can't open '%s': %s", SourceFile, strerror(errno));
return NULL;
}
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);
return NULL;
}
// Audio stuff
int16_t *db;
MatroskaAudioContext *AudioContexts;
MatroskaIndexMemory IM = MatroskaIndexMemory(mkv_GetNumTracks(MF), db, AudioContexts, MF, &MC);
for (unsigned int i = 0; i < mkv_GetNumTracks(MF); i++) {
TrackInfo *TI = mkv_GetTrackInfo(MF, i);
if (IndexMask & (1 << i) && TI->Type == TT_AUDIO) {
AVCodecContext *AudioCodecContext = avcodec_alloc_context();
AudioCodecContext->extradata = (uint8_t *)TI->CodecPrivate;
AudioCodecContext->extradata_size = TI->CodecPrivateSize;
AudioContexts[i].CTX = AudioCodecContext;
if (TI->CompEnabled) {
AudioContexts[i].CS = cs_Create(MF, i, ErrorMessage, sizeof(ErrorMessage));
if (AudioContexts[i].CS == NULL) {
av_free(AudioCodecContext);
AudioContexts[i].CTX = NULL;
_snprintf(ErrorMsg, MsgSize, "Can't create decompressor: %s", ErrorMessage);
return NULL;
}
}
AVCodec *AudioCodec = avcodec_find_decoder(MatroskaToFFCodecID(TI->CodecID, TI->CodecPrivate));
if (AudioCodec == NULL) {
av_free(AudioCodecContext);
AudioContexts[i].CTX = NULL;
_snprintf(ErrorMsg, MsgSize, "Audio codec not found");
return NULL;
}
if (avcodec_open(AudioCodecContext, AudioCodec) < 0) {
av_free(AudioCodecContext);
AudioContexts[i].CTX = NULL;
_snprintf(ErrorMsg, MsgSize, "Could not open audio codec");
return NULL;
}
} else {
IndexMask &= ~(1 << i);
}
}
//
int64_t CurrentPos = _ftelli64(MC.ST.fp);
_fseeki64(MC.ST.fp, 0, SEEK_END);
int64_t SourceSize = _ftelli64(MC.ST.fp);
_fseeki64(MC.ST.fp, CurrentPos, SEEK_SET);
FrameIndex *TrackIndices = new FrameIndex();
TrackIndices->Decoder = 1;
for (unsigned int i = 0; i < mkv_GetNumTracks(MF); i++)
TrackIndices->push_back(FrameInfoVector(mkv_TruncFloat(mkv_GetTrackInfo(MF, i)->TimecodeScale), 1000000, mkv_GetTrackInfo(MF, i)->Type - 1));
ulonglong StartTime, EndTime, FilePos;
unsigned int Track, FrameFlags, FrameSize;
while (mkv_ReadFrame(MF, 0, &Track, &StartTime, &EndTime, &FilePos, &FrameSize, &FrameFlags) == 0) {
// Update progress
if (IP) {
if ((*IP)(0, _ftelli64(MC.ST.fp), SourceSize, Private)) {
_snprintf(ErrorMsg, MsgSize, "Cancelled by user");
delete TrackIndices;
return NULL;
}
}
// Only create index entries for video for now to save space
if (mkv_GetTrackInfo(MF, Track)->Type == TT_VIDEO) {
(*TrackIndices)[Track].push_back(FrameInfo(StartTime, (FrameFlags & FRAME_KF) != 0));
} else if (mkv_GetTrackInfo(MF, Track)->Type == TT_AUDIO && (IndexMask & (1 << Track))) {
(*TrackIndices)[Track].push_back(FrameInfo(AudioContexts[Track].CurrentSample, FilePos, FrameSize, (FrameFlags & FRAME_KF) != 0));
ReadFrame(FilePos, FrameSize, AudioContexts[Track].CS, MC, ErrorMsg, MsgSize);
int Size = FrameSize;
uint8_t *Data = MC.Buffer;
AVCodecContext *AudioCodecContext = AudioContexts[Track].CTX;
while (Size > 0) {
int dbsize = AVCODEC_MAX_AUDIO_FRAME_SIZE*10;
int Ret = avcodec_decode_audio2(AudioCodecContext, db, &dbsize, Data, Size);
if (Ret < 0) {
if (IgnoreDecodeErrors) {
(*TrackIndices)[Track].clear();
IndexMask &= ~(1 << Track);
break;
} else {
_snprintf(ErrorMsg, MsgSize, "Audio decoding error");
delete TrackIndices;
return NULL;
}
}
if (Ret > 0) {
Size -= Ret;
Data += Ret;
}
if (dbsize > 0)
AudioContexts[Track].CurrentSample += (dbsize * 8) / (av_get_bits_per_sample_format(AudioCodecContext->sample_fmt) * AudioCodecContext->channels);
if (dbsize > 0 && (DumpMask & (1 << Track))) {
// Delay writer creation until after an audio frame has been decoded. This ensures that all parameters are known when writing the headers.
if (!AudioContexts[Track].W64W) {
char ABuf[50];
std::string WN(AudioFile);
int Offset = StartTime * mkv_TruncFloat(mkv_GetTrackInfo(MF, Track)->TimecodeScale) / (double)1000000;
_snprintf(ABuf, sizeof(ABuf), ".%02d.delay.%d.w64", Track, Offset);
WN += ABuf;
AudioContexts[Track].W64W = new Wave64Writer(WN.c_str(), av_get_bits_per_sample_format(AudioCodecContext->sample_fmt),
AudioCodecContext->channels, AudioCodecContext->sample_rate, AudioFMTIsFloat(AudioCodecContext->sample_fmt));
}
AudioContexts[Track].W64W->WriteData(db, dbsize);
}
}
}
}
SortTrackIndices(TrackIndices);
return TrackIndices;
}
FrameIndex *MakeIndex(const char *SourceFile, int IndexMask, int DumpMask, const char *AudioFile, bool IgnoreDecodeErrors, IndexCallback IP, void *Private, char *ErrorMsg, unsigned MsgSize) {
AVFormatContext *FormatContext = NULL;
IndexMask |= DumpMask;
if (av_open_input_file(&FormatContext, SourceFile, NULL, 0, NULL) != 0) {
_snprintf(ErrorMsg, MsgSize, "Can't open '%s'", SourceFile);
return NULL;
}
// Do matroska indexing instead?
if (!strcmp(FormatContext->iformat->name, "matroska")) {
av_close_input_file(FormatContext);
return MakeMatroskaIndex(SourceFile, IndexMask, DumpMask, AudioFile, IgnoreDecodeErrors, IP, Private, ErrorMsg, MsgSize);
}
#ifdef HAALITS
// Do haali ts indexing instead?
if (!strcmp(FormatContext->iformat->name, "mpegts")) {
av_close_input_file(FormatContext);
return MakeHaaliTSIndex(SourceFile, IndexMask, DumpMask, AudioFile, IgnoreDecodeErrors, IP, Private, ErrorMsg, MsgSize);
}
#endif
if (av_find_stream_info(FormatContext) < 0) {
av_close_input_file(FormatContext);
_snprintf(ErrorMsg, MsgSize, "Couldn't find stream information");
return NULL;
}
// Audio stuff
int16_t *db;
FFAudioContext *AudioContexts;
FFIndexMemory IM = FFIndexMemory(FormatContext->nb_streams, db, AudioContexts, FormatContext);
for (unsigned int i = 0; i < FormatContext->nb_streams; i++) {
if (IndexMask & (1 << i) && FormatContext->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
AVCodecContext *AudioCodecContext = FormatContext->streams[i]->codec;
AVCodec *AudioCodec = avcodec_find_decoder(AudioCodecContext->codec_id);
if (AudioCodec == NULL) {
_snprintf(ErrorMsg, MsgSize, "Audio codec not found");
return NULL;
}
if (avcodec_open(AudioCodecContext, AudioCodec) < 0) {
_snprintf(ErrorMsg, MsgSize, "Could not open audio codec");
return NULL;
}
AudioContexts[i].CTX = AudioCodecContext;
} else {
IndexMask &= ~(1 << i);
}
}
//
FrameIndex *TrackIndices = new FrameIndex();
TrackIndices->Decoder = 0;
for (unsigned int i = 0; i < FormatContext->nb_streams; i++)
TrackIndices->push_back(FrameInfoVector(FormatContext->streams[i]->time_base.num * 1000,
FormatContext->streams[i]->time_base.den,
FormatContext->streams[i]->codec->codec_type));
AVPacket Packet;
while (av_read_frame(FormatContext, &Packet) >= 0) {
// Update progress
if (IP) {
if ((*IP)(0, FormatContext->pb->pos, FormatContext->file_size, Private)) {
_snprintf(ErrorMsg, MsgSize, "Cancelled by user");
delete TrackIndices;
return NULL;
}
}
// Only create index entries for video for now to save space
if (FormatContext->streams[Packet.stream_index]->codec->codec_type == CODEC_TYPE_VIDEO) {
(*TrackIndices)[Packet.stream_index].push_back(FrameInfo(Packet.dts, (Packet.flags & PKT_FLAG_KEY) ? 1 : 0));
} else if (FormatContext->streams[Packet.stream_index]->codec->codec_type == CODEC_TYPE_AUDIO && (IndexMask & (1 << Packet.stream_index))) {
(*TrackIndices)[Packet.stream_index].push_back(FrameInfo(Packet.dts, AudioContexts[Packet.stream_index].CurrentSample, (Packet.flags & PKT_FLAG_KEY) ? 1 : 0));
AVCodecContext *AudioCodecContext = FormatContext->streams[Packet.stream_index]->codec;
int Size = Packet.size;
uint8_t *Data = Packet.data;
while (Size > 0) {
int dbsize = AVCODEC_MAX_AUDIO_FRAME_SIZE*10;
int Ret = avcodec_decode_audio2(AudioCodecContext, db, &dbsize, Data, Size);
if (Ret < 0) {
if (IgnoreDecodeErrors) {
(*TrackIndices)[Packet.stream_index].clear();
IndexMask &= ~(1 << Packet.stream_index);
break;
} else {
_snprintf(ErrorMsg, MsgSize, "Audio decoding error");
delete TrackIndices;
return NULL;
}
}
if (Ret > 0) {
Size -= Ret;
Data += Ret;
}
if (dbsize > 0)
AudioContexts[Packet.stream_index].CurrentSample += (dbsize * 8) / (av_get_bits_per_sample_format(AudioCodecContext->sample_fmt) * AudioCodecContext->channels);
if (dbsize > 0 && (DumpMask & (1 << Packet.stream_index))) {
// Delay writer creation until after an audio frame has been decoded. This ensures that all parameters are known when writing the headers.
if (!AudioContexts[Packet.stream_index].W64W) {
char ABuf[50];
std::string WN(AudioFile);
int Offset = (Packet.dts * FormatContext->streams[Packet.stream_index]->time_base.num)
/ (double)(FormatContext->streams[Packet.stream_index]->time_base.den * 1000);
_snprintf(ABuf, sizeof(ABuf), ".%02d.delay.%d.w64", Packet.stream_index, Offset);
WN += ABuf;
AudioContexts[Packet.stream_index].W64W = new Wave64Writer(WN.c_str(), av_get_bits_per_sample_format(AudioCodecContext->sample_fmt),
AudioCodecContext->channels, AudioCodecContext->sample_rate, AudioFMTIsFloat(AudioCodecContext->sample_fmt));
}
AudioContexts[Packet.stream_index].W64W->WriteData(db, dbsize);
}
}
}
av_free_packet(&Packet);
}
SortTrackIndices(TrackIndices);
return TrackIndices;
}
FrameIndex *ReadIndex(const char *IndexFile, char *ErrorMsg, unsigned MsgSize) {
std::ifstream Index(IndexFile, std::ios::in | std::ios::binary);
if (!Index.is_open()) {
_snprintf(ErrorMsg, MsgSize, "Failed to open '%s' for reading", IndexFile);
return NULL;
}
// Read the index file header
IndexHeader IH;
Index.read(reinterpret_cast<char *>(&IH), sizeof(IH));
if (IH.Id != INDEXID) {
_snprintf(ErrorMsg, MsgSize, "'%s' is not a valid index file", IndexFile);
return NULL;
}
if (IH.Version != INDEXVERSION) {
_snprintf(ErrorMsg, MsgSize, "'%s' is not the expected index version", IndexFile);
return NULL;
}
FrameIndex *TrackIndices = new FrameIndex();
try {
TrackIndices->Decoder = IH.Decoder;
for (unsigned int i = 0; i < IH.Tracks; i++) {
// Read how many records belong to the current stream
int TT;
Index.read(reinterpret_cast<char *>(&TT), sizeof(TT));
int Num;
Index.read(reinterpret_cast<char *>(&Num), sizeof(Num));
int Den;
Index.read(reinterpret_cast<char *>(&Den), sizeof(Den));
size_t Frames;
Index.read(reinterpret_cast<char *>(&Frames), sizeof(Frames));
TrackIndices->push_back(FrameInfoVector(Num, Den, TT));
FrameInfo FI(0, false);
for (size_t j = 0; j < Frames; j++) {
Index.read(reinterpret_cast<char *>(&FI), sizeof(FrameInfo));
TrackIndices->at(i).push_back(FI);
}
}
} catch (...) {
delete TrackIndices;
_snprintf(ErrorMsg, MsgSize, "Unknown error while reading index information in '%s'", IndexFile);
return NULL;
}
return TrackIndices;
}
int FrameInfoVector::WriteTimecodes(const char *TimecodeFile, char *ErrorMsg, unsigned MsgSize) {
std::ofstream Timecodes(TimecodeFile, std::ios::out | std::ios::trunc);
if (!Timecodes.is_open()) {
_snprintf(ErrorMsg, MsgSize, "Failed to open '%s' for writing", TimecodeFile);
return 1;
}
Timecodes << "# timecode format v2\n";
for (iterator Cur=begin(); Cur!=end(); Cur++)
Timecodes << (int64_t)((Cur->DTS * TB.Num) / (double)TB.Den) << "\n";
return 0;
}
int FrameInfoVector::FrameFromDTS(int64_t DTS) {
for (int i = 0; i < static_cast<int>(size()); i++)
if (at(i).DTS == DTS)
return i;
return -1;
}
int FrameInfoVector::ClosestFrameFromDTS(int64_t DTS) {
int Frame = 0;
int64_t BestDiff = 0xFFFFFFFFFFFFFFLL; // big number
for (int i = 0; i < static_cast<int>(size()); i++) {
int64_t CurrentDiff = FFABS(at(i).DTS - DTS);
if (CurrentDiff < BestDiff) {
BestDiff = CurrentDiff;
Frame = i;
}
}
//int64_t tmp = at(2).DTS - at(1).DTS;
//ATLASSERT(BestDiff == 0);
return Frame;
}
int FrameInfoVector::FindClosestKeyFrame(int Frame) {
Frame = FFMIN(FFMAX(Frame, 0), size() - 1);
for (int i = Frame; i > 0; i--)
if (at(i).KeyFrame)
return i;
return 0;
}
FrameInfoVector::FrameInfoVector() {
this->TT = 0;
this->TB.Num = 0;
this->TB.Den = 0;
}
FrameInfoVector::FrameInfoVector(int Num, int Den, int TT) {
this->TT = TT;
this->TB.Num = Num;
this->TB.Den = Den;
}
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