Aegisub/aegisub/libffms/src/core/audiosource.h

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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.
#ifndef FFAUDIOSOURCE_H
#define FFAUDIOSOURCE_H
extern "C" {
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
}
#include <vector>
#include <list>
#include <memory>
#include "indexing.h"
#include "utils.h"
#include "ffms.h"
#ifdef HAALISOURCE
# define WIN32_LEAN_AND_MEAN
# define _WIN32_DCOM
# include <windows.h>
# include <tchar.h>
# include <atlbase.h>
# include <dshow.h>
# include <initguid.h>
# include "CoParser.h"
# include "guids.h"
#endif
class FFMS_AudioSource {
struct AudioBlock {
int64_t Age;
int64_t Start;
int64_t Samples;
std::vector<uint8_t> Data;
AudioBlock(int64_t Start, int64_t Samples, uint8_t *SrcData, size_t SrcBytes)
: Start(Start)
, Samples(Samples)
, Data(SrcData, SrcData + SrcBytes)
{
static int64_t Now = 0;
Age = Now++;
}
};
typedef std::list<AudioBlock>::iterator CacheIterator;
// delay in samples to apply to the audio
int64_t Delay;
// cache of decoded audio blocks
std::list<AudioBlock> Cache;
// max size of the cache in blocks
size_t MaxCacheBlocks;
// pointer to last element of the cache which should never be deleted
CacheIterator CacheNoDelete;
// bytes per sample * number of channels
size_t BytesPerSample;
// Number of samples stored in the decoding buffer
size_t Decoded;
// Insert a block into the cache
void CacheBlock(CacheIterator &pos, int64_t Start, size_t Samples, uint8_t *SrcData);
// Called after seeking
virtual void Seek() { };
// Read the next packet from the file
virtual bool ReadPacket(AVPacket *) = 0;
virtual void FreePacket(AVPacket *) { }
protected:
// First sample which is stored in the decoding buffer
int64_t CurrentSample;
// Next packet to be read
size_t PacketNumber;
// Current audio frame
TFrameInfo *CurrentFrame;
// Track which this corresponds to
int TrackNumber;
// Number of packets which the demuxer requires to know where it is
// If -1, seeking is assumed to be impossible
int SeekOffset;
// Buffer which audio is decoded into
AlignedBuffer<uint8_t> DecodingBuffer;
FFMS_Track Frames;
FFCodecContext CodecContext;
FFMS_AudioProperties AP;
void DecodeNextBlock();
// Initialization which has to be done after the codec is opened
void Init(FFMS_Index &Index, int DelayMode);
FFMS_AudioSource(const char *SourceFile, FFMS_Index &Index, int Track);
public:
virtual ~FFMS_AudioSource() { };
FFMS_Track *GetTrack() { return &Frames; }
const FFMS_AudioProperties& GetAudioProperties() const { return AP; }
void GetAudio(void *Buf, int64_t Start, int64_t Count);
};
class FFLAVFAudio : public FFMS_AudioSource {
AVFormatContext *FormatContext;
bool ReadPacket(AVPacket *);
void FreePacket(AVPacket *);
void Seek();
public:
FFLAVFAudio(const char *SourceFile, int Track, FFMS_Index &Index, int DelayMode);
~FFLAVFAudio();
};
class FFMatroskaAudio : public FFMS_AudioSource {
MatroskaFile *MF;
MatroskaReaderContext MC;
TrackInfo *TI;
std::auto_ptr<TrackCompressionContext> TCC;
char ErrorMessage[256];
bool ReadPacket(AVPacket *);
public:
FFMatroskaAudio(const char *SourceFile, int Track, FFMS_Index &Index, int DelayMode);
~FFMatroskaAudio();
};
#ifdef HAALISOURCE
class FFHaaliAudio : public FFMS_AudioSource {
CComPtr<IMMContainer> pMMC;
CComPtr<IMMFrame> pMMF;
bool ReadPacket(AVPacket *);
void Seek();
public:
FFHaaliAudio(const char *SourceFile, int Track, FFMS_Index &Index, enum FFMS_Sources SourceMode, int DelayMode);
};
#endif // HAALISOURCE
size_t GetSeekablePacketNumber(FFMS_Track const& Frames, size_t PacketNumber);
#endif