forked from teamnwah/openmw-tes3coop
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
#ifndef VIDEOPLAYER_AUDIODECODER_H
|
|
#define VIDEOPLAYER_AUDIODECODER_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <new>
|
|
#include <memory>
|
|
|
|
extern "C"
|
|
{
|
|
#include <libavutil/avutil.h>
|
|
#include <libavcodec/avcodec.h>
|
|
#include <libavformat/avformat.h>
|
|
|
|
#if AV_VERSION_INT(52, 2, 0) <= AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
|
|
LIBAVUTIL_VERSION_MINOR, LIBAVUTIL_VERSION_MICRO)
|
|
#include <libavutil/channel_layout.h>
|
|
#endif
|
|
}
|
|
|
|
#if defined(_WIN32) && !defined(__MINGW32__)
|
|
#include <basetsd.h>
|
|
|
|
typedef SSIZE_T ssize_t;
|
|
#endif
|
|
|
|
namespace Video
|
|
{
|
|
|
|
struct AudioResampler;
|
|
|
|
struct VideoState;
|
|
|
|
class MovieAudioDecoder
|
|
{
|
|
protected:
|
|
VideoState *mVideoState;
|
|
AVStream *mAVStream;
|
|
enum AVSampleFormat mOutputSampleFormat;
|
|
uint64_t mOutputChannelLayout;
|
|
int mOutputSampleRate;
|
|
ssize_t mFramePos;
|
|
ssize_t mFrameSize;
|
|
double mAudioClock;
|
|
|
|
private:
|
|
struct AutoAVPacket : public AVPacket {
|
|
AutoAVPacket(int size=0)
|
|
{
|
|
if(av_new_packet(this, size) < 0)
|
|
throw std::bad_alloc();
|
|
}
|
|
~AutoAVPacket()
|
|
{ av_free_packet(this); }
|
|
};
|
|
|
|
|
|
std::auto_ptr<AudioResampler> mAudioResampler;
|
|
|
|
uint8_t *mDataBuf;
|
|
uint8_t **mFrameData;
|
|
int mDataBufLen;
|
|
|
|
AutoAVPacket mPacket;
|
|
AVFrame *mFrame;
|
|
|
|
/* averaging filter for audio sync */
|
|
double mAudioDiffAccum;
|
|
const double mAudioDiffAvgCoef;
|
|
const double mAudioDiffThreshold;
|
|
int mAudioDiffAvgCount;
|
|
|
|
/* Add or subtract samples to get a better sync, return number of bytes to
|
|
* skip (negative means to duplicate). */
|
|
int synchronize_audio();
|
|
|
|
/// @param sample_skip If seeking happened, the sample_skip variable will be reset to 0.
|
|
int audio_decode_frame(AVFrame *frame, int &sample_skip);
|
|
|
|
public:
|
|
MovieAudioDecoder(VideoState *is);
|
|
virtual ~MovieAudioDecoder();
|
|
|
|
int getOutputSampleRate() const;
|
|
AVSampleFormat getOutputSampleFormat() const;
|
|
uint64_t getOutputChannelLayout() const;
|
|
|
|
void setupFormat();
|
|
|
|
/// Adjust the given audio settings to the application's needs. The data given by the read() function will
|
|
/// be in the desired format written to this function's parameters.
|
|
/// @par Depending on the application, we may want either fixed settings, or a "closest supported match"
|
|
/// for the input that does not incur precision loss (e.g. planar -> non-planar format).
|
|
virtual void adjustAudioSettings(AVSampleFormat& sampleFormat, uint64_t& channelLayout, int& sampleRate) = 0;
|
|
|
|
/// Return the current offset in seconds from the beginning of the audio stream.
|
|
/// @par An internal clock exists in the mAudioClock member, and is used in the default implementation. However,
|
|
/// for an accurate clock, it's best to also take the current offset in the audio buffer into account.
|
|
virtual double getAudioClock();
|
|
|
|
/// This is the main interface to be used by the user's audio library.
|
|
/// @par Request filling the \a stream with \a len number of bytes.
|
|
/// @return The number of bytes read (may not be the requested number if we arrived at the end of the audio stream)
|
|
size_t read(char *stream, size_t len);
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|