AudioSampleBufferList.h [plain text]
#pragma once
#if ENABLE(MEDIA_STREAM)
#include "CARingBuffer.h"
#include "WebAudioBufferList.h"
#include <CoreAudio/CoreAudioTypes.h>
#include <wtf/Lock.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
typedef struct AudioStreamBasicDescription AudioStreamBasicDescription;
typedef struct OpaqueAudioConverter* AudioConverterRef;
namespace WebCore {
class AudioSampleBufferList : public RefCounted<AudioSampleBufferList> {
public:
static Ref<AudioSampleBufferList> create(const CAAudioStreamDescription&, size_t);
~AudioSampleBufferList();
static inline size_t audioBufferListSizeForStream(const CAAudioStreamDescription&);
static void applyGain(AudioBufferList&, float, AudioStreamDescription::PCMFormat);
void applyGain(float);
OSStatus copyFrom(const AudioSampleBufferList&, size_t count = SIZE_MAX);
OSStatus copyFrom(const AudioBufferList&, size_t frameCount, AudioConverterRef);
OSStatus copyFrom(AudioSampleBufferList&, size_t frameCount, AudioConverterRef);
OSStatus copyFrom(CARingBuffer&, size_t frameCount, uint64_t startFrame, CARingBuffer::FetchMode);
OSStatus mixFrom(const AudioSampleBufferList&, size_t count = SIZE_MAX);
OSStatus copyTo(AudioBufferList&, size_t count = SIZE_MAX);
const AudioStreamBasicDescription& streamDescription() const { return m_internalFormat->streamDescription(); }
const WebAudioBufferList& bufferList() const { return m_bufferList; }
WebAudioBufferList& bufferList() { return m_bufferList; }
uint32_t sampleCapacity() const { return m_sampleCapacity; }
uint32_t sampleCount() const { return m_sampleCount; }
void setSampleCount(size_t);
uint64_t timestamp() const { return m_timestamp; }
double hostTime() const { return m_hostTime; }
void setTimes(uint64_t time, double hostTime) { m_timestamp = time; m_hostTime = hostTime; }
void reset();
static void zeroABL(AudioBufferList&, size_t);
void zero();
protected:
AudioSampleBufferList(const CAAudioStreamDescription&, size_t);
UniqueRef<CAAudioStreamDescription> m_internalFormat;
uint64_t m_timestamp { 0 };
double m_hostTime { -1 };
size_t m_sampleCount { 0 };
size_t m_sampleCapacity { 0 };
size_t m_maxBufferSizePerChannel { 0 };
size_t m_bufferListBaseSize { 0 };
UniqueRef<WebAudioBufferList> m_bufferList;
};
inline size_t AudioSampleBufferList::audioBufferListSizeForStream(const CAAudioStreamDescription& description)
{
return offsetof(AudioBufferList, mBuffers) + (sizeof(AudioBuffer) * std::max<uint32_t>(1, description.numberOfChannelStreams()));
}
}
#endif // ENABLE(MEDIA_STREAM)