Aegisub/aegisub/FFmpegSource2/ffaudiosource.h

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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.
#ifndef FFAUDIOSOURCE_H
#define FFAUDIOSOURCE_H
extern "C" {
#include <libavformat/avformat.h>
#include <libavcodec/avcodec.h>
}
#include <vector>
#include "indexing.h"
#include "utils.h"
#include "ffms.h"
class AudioBase {
protected:
uint8_t *DecodingBuffer;
FrameInfoVector Frames;
AVCodecContext *CodecContext;
AudioProperties AP;
size_t FindClosestAudioKeyFrame(int64_t Sample);
public:
AudioBase();
~AudioBase();
const AudioProperties& GetAudioProperties() { return AP; }
virtual int GetAudio(void *Buf, int64_t Start, int64_t Count, char *ErrorMsg, unsigned MsgSize) = 0;
};
class FFAudioSource : public AudioBase {
private:
AVFormatContext *FormatContext;
int AudioTrack;
int DecodeNextAudioBlock(uint8_t *Buf, int64_t *Count, char *ErrorMsg, unsigned MsgSize);
void Free(bool CloseCodec);
public:
FFAudioSource(const char *SourceFile, int Track, FrameIndex *TrackIndices, char *ErrorMsg, unsigned MsgSize);
~FFAudioSource();
int GetAudio(void *Buf, int64_t Start, int64_t Count, char *ErrorMsg, unsigned MsgSize);
};
class MatroskaAudioSource : public AudioBase {
private:
MatroskaFile *MF;
MatroskaReaderContext MC;
CompressedStream *CS;
char ErrorMessage[256];
int DecodeNextAudioBlock(uint8_t *Buf, int64_t *Count, uint64_t FilePos, unsigned int FrameSize, char *ErrorMsg, unsigned MsgSize);
void Free(bool CloseCodec);
public:
MatroskaAudioSource(const char *SourceFile, int Track, FrameIndex *TrackIndices, char *ErrorMsg, unsigned MsgSize);
~MatroskaAudioSource();
int GetAudio(void *Buf, int64_t Start, int64_t Count, char *ErrorMsg, unsigned MsgSize);
};
#endif