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Aegisub/aegisub/FFmpegSource2/utils.cpp

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// Copyright (c) 2007-2009 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 "utils.h"
#include "indexing.h"
#include <string.h>
#include <errno.h>
#include <iostream>
#include <fstream>
#ifdef _MSC_VER
# include <intrin.h>
#endif
// Export the array but not its data type... fun...
typedef struct CodecTags{
char str[20];
enum CodecID id;
} CodecTags;
extern "C" {
extern const AVCodecTag codec_bmp_tags[];
extern const CodecTags ff_mkv_codec_tags[];
extern const AVCodecTag codec_movvideo_tags[];
extern const AVCodecTag codec_wav_tags[];
}
#ifdef __UNIX__
#define _fseeki64 fseeko
#define _ftelli64 ftello
#define _snprintf snprintf
#endif
TFrameInfo::TFrameInfo(int64_t DTS, bool KeyFrame) {
this->DTS = DTS;
this->KeyFrame = KeyFrame;
this->SampleStart = 0;
this->FilePos = 0;
this->FrameSize = 0;
}
TFrameInfo::TFrameInfo(int64_t DTS, int64_t FilePos, unsigned int FrameSize, bool KeyFrame) {
this->DTS = DTS;
this->KeyFrame = KeyFrame;
this->SampleStart = 0;
this->FilePos = FilePos;
this->FrameSize = FrameSize;
}
TFrameInfo::TFrameInfo(int64_t DTS, int64_t SampleStart, bool KeyFrame) {
this->DTS = DTS;
this->KeyFrame = KeyFrame;
this->SampleStart = SampleStart;
this->FilePos = 0;
this->FrameSize = 0;
}
TFrameInfo::TFrameInfo(int64_t DTS, int64_t SampleStart, int64_t FilePos, unsigned int FrameSize, bool KeyFrame) {
this->DTS = DTS;
this->KeyFrame = KeyFrame;
this->SampleStart = SampleStart;
this->FilePos = FilePos;
this->FrameSize = FrameSize;
}
int FFTrack::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 << std::fixed << ((Cur->DTS * TB.Num) / (double)TB.Den) << "\n";
return 0;
}
int FFTrack::FrameFromDTS(int64_t DTS) {
for (int i = 0; i < static_cast<int>(size()); i++)
if (at(i).DTS == DTS)
return i;
return -1;
}
int FFTrack::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 FFTrack::FindClosestVideoKeyFrame(int Frame) {
Frame = FFMIN(FFMAX(Frame, 0), static_cast<int>(size()) - 1);
for (int i = Frame; i > 0; i--)
if (at(i).KeyFrame)
return i;
return 0;
}
int FFTrack::FindClosestAudioKeyFrame(int64_t Sample) {
for (size_t i = 0; i < size(); i++) {
if (at(i).SampleStart == Sample && at(i).KeyFrame)
return i;
else if (at(i).SampleStart > Sample && at(i).KeyFrame)
return i - 1;
}
return size() - 1;
}
FFTrack::FFTrack() {
this->TT = FFMS_TYPE_UNKNOWN;
this->TB.Num = 0;
this->TB.Den = 0;
}
FFTrack::FFTrack(int64_t Num, int64_t Den, FFMS_TrackType TT) {
this->TT = TT;
this->TB.Num = Num;
this->TB.Den = Den;
}
int FFIndex::WriteIndex(const char *IndexFile, char *ErrorMsg, unsigned MsgSize) {
std::ofstream IndexStream(IndexFile, std::ios::out | std::ios::binary | std::ios::trunc);
if (!IndexStream.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 = size();
IH.Decoder = Decoder;
IH.LAVUVersion = LIBAVUTIL_VERSION_INT;
IH.LAVFVersion = LIBAVFORMAT_VERSION_INT;
IH.LAVCVersion = LIBAVCODEC_VERSION_INT;
IH.LSWSVersion = LIBSWSCALE_VERSION_INT;
IH.LPPVersion = LIBPOSTPROC_VERSION_INT;
IndexStream.write(reinterpret_cast<char *>(&IH), sizeof(IH));
for (unsigned int i = 0; i < IH.Tracks; i++) {
FFMS_TrackType TT = at(i).TT;
IndexStream.write(reinterpret_cast<char *>(&TT), sizeof(TT));
int64_t Num = at(i).TB.Num;
IndexStream.write(reinterpret_cast<char *>(&Num), sizeof(Num));
int64_t Den = at(i).TB.Den;
IndexStream.write(reinterpret_cast<char *>(&Den), sizeof(Den));
int64_t Frames = at(i).size();
IndexStream.write(reinterpret_cast<char *>(&Frames), sizeof(Frames));
for (FFTrack::iterator Cur=at(i).begin(); Cur!=at(i).end(); Cur++)
IndexStream.write(reinterpret_cast<char *>(&*Cur), sizeof(TFrameInfo));
}
return 0;
}
int FFIndex::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 1;
}
// 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 2;
}
if (IH.Version != INDEXVERSION) {
_snprintf(ErrorMsg, MsgSize, "'%s' is not the expected index version", IndexFile);
return 3;
}
if (IH.LAVUVersion != LIBAVUTIL_VERSION_INT || IH.LAVFVersion != LIBAVFORMAT_VERSION_INT ||
IH.LAVCVersion != LIBAVCODEC_VERSION_INT || IH.LSWSVersion != LIBSWSCALE_VERSION_INT ||
IH.LPPVersion != LIBPOSTPROC_VERSION_INT) {
_snprintf(ErrorMsg, MsgSize, "A different FFmpeg build was used to create '%s'", IndexFile);
return 4;
}
try {
Decoder = IH.Decoder;
for (unsigned int i = 0; i < IH.Tracks; i++) {
// Read how many records belong to the current stream
FFMS_TrackType TT;
Index.read(reinterpret_cast<char *>(&TT), sizeof(TT));
int64_t Num;
Index.read(reinterpret_cast<char *>(&Num), sizeof(Num));
int64_t Den;
Index.read(reinterpret_cast<char *>(&Den), sizeof(Den));
int64_t Frames;
Index.read(reinterpret_cast<char *>(&Frames), sizeof(Frames));
push_back(FFTrack(Num, Den, TT));
TFrameInfo FI(0, false);
for (size_t j = 0; j < Frames; j++) {
Index.read(reinterpret_cast<char *>(&FI), sizeof(TFrameInfo));
at(i).push_back(FI);
}
}
} catch (...) {
_snprintf(ErrorMsg, MsgSize, "Unknown error while reading index information in '%s'", IndexFile);
return 5;
}
return 0;
}
int GetCPUFlags() {
// FIXME Add proper feature detection when msvc isn't used
int Flags = PP_CPU_CAPS_MMX | PP_CPU_CAPS_MMX2;
#ifdef _MSC_VER
Flags = 0;
int CPUInfo[4];
__cpuid(CPUInfo, 0);
// PP and SWS defines have the same values for their defines so this actually works
if (CPUInfo[3] & (1 << 23))
Flags |= PP_CPU_CAPS_MMX;
if (CPUInfo[3] & (1 << 25))
Flags |= PP_CPU_CAPS_MMX2;
#endif
return Flags;
}
FFMS_TrackType HaaliTrackTypeToFFTrackType(int TT) {
switch (TT) {
case TT_VIDEO: return FFMS_TYPE_VIDEO; break;
case TT_AUDIO: return FFMS_TYPE_AUDIO; break;
case TT_SUB: return FFMS_TYPE_SUBTITLE; break;
default: return FFMS_TYPE_UNKNOWN;
}
}
int ReadFrame(uint64_t FilePos, unsigned int &FrameSize, CompressedStream *CS, MatroskaReaderContext &Context, char *ErrorMsg, unsigned MsgSize) {
if (CS) {
char CSBuffer[4096];
unsigned int DecompressedFrameSize = 0;
cs_NextFrame(CS, FilePos, FrameSize);
for (;;) {
int ReadBytes = cs_ReadData(CS, CSBuffer, sizeof(CSBuffer));
if (ReadBytes < 0) {
_snprintf(ErrorMsg, MsgSize, "Error decompressing data: %s", cs_GetLastError(CS));
return 1;
}
if (ReadBytes == 0) {
FrameSize = DecompressedFrameSize;
return 0;
}
if (Context.BufferSize < DecompressedFrameSize + ReadBytes) {
Context.BufferSize = FrameSize;
Context.Buffer = (uint8_t *)realloc(Context.Buffer, Context.BufferSize + 16);
if (Context.Buffer == NULL) {
_snprintf(ErrorMsg, MsgSize, "Out of memory");
return 2;
}
}
memcpy(Context.Buffer + DecompressedFrameSize, CSBuffer, ReadBytes);
DecompressedFrameSize += ReadBytes;
}
} else {
if (_fseeki64(Context.ST.fp, FilePos, SEEK_SET)) {
_snprintf(ErrorMsg, MsgSize, "fseek(): %s", strerror(errno));
return 3;
}
if (Context.BufferSize < FrameSize) {
Context.BufferSize = FrameSize;
Context.Buffer = (uint8_t *)realloc(Context.Buffer, Context.BufferSize + 16);
if (Context.Buffer == NULL) {
_snprintf(ErrorMsg, MsgSize, "Out of memory");
return 4;
}
}
size_t ReadBytes = fread(Context.Buffer, 1, FrameSize, Context.ST.fp);
if (ReadBytes != FrameSize) {
if (ReadBytes == 0) {
if (feof(Context.ST.fp)) {
_snprintf(ErrorMsg, MsgSize, "Unexpected EOF while reading frame");
return 5;
} else {
_snprintf(ErrorMsg, MsgSize, "Error reading frame: %s", strerror(errno));
return 6;
}
} else {
_snprintf(ErrorMsg, MsgSize, "Short read while reading frame");
return 7;
}
_snprintf(ErrorMsg, MsgSize, "Unknown read error");
return 8;
}
return 0;
}
}
bool AudioFMTIsFloat(SampleFormat FMT){
switch (FMT) {
case SAMPLE_FMT_FLT:
case SAMPLE_FMT_DBL:
return true;
default:
return false;
}
}
void InitNullPacket(AVPacket *pkt) {
av_init_packet(pkt);
pkt->data = NULL;
pkt->size = 0;
}
void FillAP(TAudioProperties &AP, AVCodecContext *CTX, FFTrack &Frames) {
AP.BitsPerSample = av_get_bits_per_sample_format(CTX->sample_fmt);
AP.Channels = CTX->channels;;
AP.Float = AudioFMTIsFloat(CTX->sample_fmt);
AP.SampleRate = CTX->sample_rate;
AP.NumSamples = (Frames.back()).SampleStart;
AP.FirstTime = ((Frames.front().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
AP.LastTime = ((Frames.back().DTS * Frames.TB.Num) / (double)Frames.TB.Den) / 1000;
}
#ifdef HAALISOURCE
unsigned vtSize(VARIANT &vt) {
if (V_VT(&vt) != (VT_ARRAY | VT_UI1))
return 0;
long lb,ub;
if (FAILED(SafeArrayGetLBound(V_ARRAY(&vt),1,&lb)) ||
FAILED(SafeArrayGetUBound(V_ARRAY(&vt),1,&ub)))
return 0;
return ub - lb + 1;
}
void vtCopy(VARIANT& vt,void *dest) {
unsigned sz = vtSize(vt);
if (sz > 0) {
void *vp;
if (SUCCEEDED(SafeArrayAccessData(V_ARRAY(&vt),&vp))) {
memcpy(dest,vp,sz);
SafeArrayUnaccessData(V_ARRAY(&vt));
}
}
}
#else
// used for matroska<->ffmpeg codec ID mapping to avoid Win32 dependency
typedef struct BITMAPINFOHEADER {
uint32_t biSize;
int32_t biWidth;
int32_t biHeight;
uint16_t biPlanes;
uint16_t biBitCount;
uint32_t biCompression;
uint32_t biSizeImage;
int32_t biXPelsPerMeter;
int32_t biYPelsPerMeter;
uint32_t biClrUsed;
uint32_t biClrImportant;
} BITMAPINFOHEADER;
#define MAKEFOURCC(ch0, ch1, ch2, ch3)\
((uint32_t)(uint8_t)(ch0) | ((uint32_t)(uint8_t)(ch1) << 8) |\
((uint32_t)(uint8_t)(ch2) << 16) | ((uint32_t)(uint8_t)(ch3) << 24 ))
#endif
CodecID MatroskaToFFCodecID(char *Codec, void *CodecPrivate) {
/* Look up native codecs */
for(int i = 0; ff_mkv_codec_tags[i].id != CODEC_ID_NONE; i++){
if(!strncmp(ff_mkv_codec_tags[i].str, Codec,
strlen(ff_mkv_codec_tags[i].str))){
return ff_mkv_codec_tags[i].id;
}
}
/* Video codecs for "avi in mkv" mode */
const AVCodecTag *const tags[] = { codec_bmp_tags, 0 };
if (!strcmp(Codec, "V_MS/VFW/FOURCC"))
return av_codec_get_id(tags, ((BITMAPINFOHEADER *)CodecPrivate)->biCompression);
// FIXME
/* Audio codecs for "avi in mkv" mode */
//#include "Mmreg.h"
//((WAVEFORMATEX *)TI->CodecPrivate)->wFormatTag
/* Fixup for uncompressed video formats */
/* Fixup for uncompressed audio formats */
return CODEC_ID_NONE;
}
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