Aegisub/FFmpegSource2/indexing.cpp

485 lines
14 KiB
C++

// 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 "indexing.h"
#include "wave64writer.h"
class AudioContext {
public:
Wave64Writer *W64W;
AVCodecContext *CTX;
CompressedStream *CS;
AudioContext() {
W64W = NULL;
CTX = NULL;
CS = NULL;
}
~AudioContext() {
delete W64W;
if (CTX) {
avcodec_close(CTX);
av_free(CTX);
}
if (CS)
cs_Destroy(CS);
}
};
class IndexMemory {
private:
int16_t *DecodingBuffer;
AudioContext *AudioContexts;
public:
IndexMemory(int Tracks, int16_t *&DecodingBuffer, AudioContext *&AudioContexts) {
DecodingBuffer = new int16_t[AVCODEC_MAX_AUDIO_FRAME_SIZE*10];
AudioContexts = new AudioContext[Tracks];
this->DecodingBuffer = DecodingBuffer;
this->AudioContexts = AudioContexts;
}
~IndexMemory() {
delete [] DecodingBuffer;
delete [] AudioContexts;
}
};
class MatroskaMemory {
private:
MatroskaFile *MF;
MatroskaReaderContext *MC;
public:
MatroskaMemory(MatroskaFile *MF, MatroskaReaderContext *MC) {
this->MF = MF;
this->MC = MC;
}
~MatroskaMemory() {
mkv_Close(MF);
fclose(MC->ST.fp);
}
};
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++) {
// Write how many records belong to the current stream
size_t Frames = (*TrackIndices)[i].size();
Index.write(reinterpret_cast<char *>(&Frames), sizeof(Frames));
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));
for (size_t j = 0; j < Frames; j++)
Index.write(reinterpret_cast<char *>(&(TrackIndices->at(i)[j])), sizeof(FrameInfo));
}
return 0;
}
static FrameIndex *MakeMatroskaIndex(const char *SourceFile, int AudioTrackMask, const char *AudioFile, 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;
}
MatroskaMemory MM = MatroskaMemory(MF, &MC);
// Audio stuff
int16_t *db;
AudioContext *AudioContexts;
IndexMemory IM = IndexMemory(mkv_GetNumTracks(MF), db, AudioContexts);
for (unsigned int i = 0; i < mkv_GetNumTracks(MF); i++) {
if (AudioTrackMask & (1 << i) && mkv_GetTrackInfo(MF, i)->Type == TT_AUDIO) {
AVCodecContext *AudioCodecContext = avcodec_alloc_context();
AudioCodecContext->extradata = (uint8_t *)mkv_GetTrackInfo(MF, i)->CodecPrivate;
AudioCodecContext->extradata_size = mkv_GetTrackInfo(MF, i)->CodecPrivateSize;
AudioContexts[i].CTX = AudioCodecContext;
if (mkv_GetTrackInfo(MF, i)->CompEnabled) {
AudioContexts[i].CS = cs_Create(MF, i, ErrorMessage, sizeof(ErrorMessage));
if (AudioContexts[i].CS == NULL) {
_snprintf(ErrorMsg, MsgSize, "Can't create decompressor: %s", ErrorMessage);
return NULL;
}
}
AVCodec *AudioCodec = avcodec_find_decoder(MatroskaToFFCodecID(mkv_GetTrackInfo(MF, i)));
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;
}
} else {
AudioTrackMask &= ~(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));
uint64_t 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");
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));
if (AudioTrackMask & (1 << Track)) {
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) {
_snprintf(ErrorMsg, MsgSize, "Audio decoding error");
return NULL;
}
if (Ret > 0) {
Size -= Ret;
Data += Ret;
}
if (dbsize > 0) {
// 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 AudioTrackMask, const char *AudioFile, IndexCallback IP, void *Private, char *ErrorMsg, unsigned MsgSize) {
AVFormatContext *FormatContext = NULL;
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, AudioTrackMask, AudioFile, IP, Private, ErrorMsg, MsgSize);
}
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;
AudioContext *AudioContexts;
IndexMemory IM = IndexMemory(FormatContext->nb_streams, db, AudioContexts);
for (unsigned int i = 0; i < FormatContext->nb_streams; i++) {
if (AudioTrackMask & (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;
}
} else {
AudioTrackMask &= ~(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));
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");
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));
if (AudioTrackMask & (1 << Packet.stream_index)) {
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) {
_snprintf(ErrorMsg, MsgSize, "Audio decoding error");
return NULL;
}
if (Ret > 0) {
Size -= Ret;
Data += Ret;
}
if (dbsize > 0) {
// 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);
}
av_close_input_file(FormatContext);
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
size_t Frames;
Index.read(reinterpret_cast<char *>(&Frames), sizeof(Frames));
int Num;
Index.read(reinterpret_cast<char *>(&Num), sizeof(Num));
int Den;
Index.read(reinterpret_cast<char *>(&Den), sizeof(Den));
TrackIndices->push_back(FrameInfoVector(Num, Den));
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;
}
FrameInfo::FrameInfo(int64_t DTS, bool KeyFrame) {
this->DTS = DTS;
this->KeyFrame = KeyFrame;
}
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;
}
}
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() {
TB.Num = 0;
TB.Den = 0;
}
FrameInfoVector::FrameInfoVector(int Num, int Den) {
TB.Num = Num;
TB.Den = Den;
}