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#pragma once
#include "sources/soundsource.h"
#include "sources/soundsourceprovider.h"
#include "sources/libfaadloader.h"
#include "util/readaheadsamplebuffer.h"
#ifdef __MP4V2__
#include <mp4v2/mp4v2.h>
#else
#include <mp4.h>
#endif
#include <vector>
namespace mixxx {
/// Decode M4A (AAC in MP4) files using FAAD2.
///
/// NOTE(2020-05-01): Decoding in version v2.9.1 of the library
/// is broken and any attempt to open files will fail.
///
/// https://github.com/mixxxdj/mixxx/pull/2738
/// https://github.com/knik0/faad2/commit/a8dc3f8ce67f4069cfa4d5cf0fcc2c6e8ef2c2aa
/// https://github.com/knik0/faad2/commit/920ec985a74c6f88fe507181df07a0cd7e51d519
class SoundSourceM4A : public SoundSource {
public:
explicit SoundSourceM4A(const QUrl& url);
~SoundSourceM4A() override;
void close() override;
protected:
ReadableSampleFrames readSampleFramesClamped(
const WritableSampleFrames& sampleFrames) override;
private:
OpenResult tryOpen(
OpenMode mode,
const OpenParams& params) override;
bool openDecoder();
bool reopenDecoder();
bool replaceDecoder(
faad2::DecoderHandle hNewDecoder);
void closeDecoder();
bool isValidSampleBlockId(MP4SampleId sampleBlockId) const;
void restartDecoding(MP4SampleId sampleBlockId);
faad2::LibLoader* const m_pFaad;
MP4FileHandle m_hFile;
MP4TrackId m_trackId;
MP4Duration m_framesPerSampleBlock;
MP4SampleId m_maxSampleBlockId;
u_int8_t* m_pMP4ESConfigBuffer{};
u_int32_t m_sizeofMP4ESConfigBuffer;
typedef std::vector<u_int8_t> InputBuffer;
InputBuffer m_inputBuffer;
InputBuffer::size_type m_inputBufferLength;
InputBuffer::size_type m_inputBufferOffset;
OpenParams m_openParams;
faad2::DecoderHandle m_hDecoder;
SINT m_numberOfPrefetchSampleBlocks;
MP4SampleId m_curSampleBlockId;
ReadAheadSampleBuffer m_sampleBuffer;
SINT m_curFrameIndex;
};
class SoundSourceProviderM4A : public SoundSourceProvider {
public:
static const QString kDisplayName;
static const QStringList kSupportedFileExtensions;
QString getDisplayName() const override {
return kDisplayName;
}
QStringList getSupportedFileExtensions() const override;
SoundSourcePointer newSoundSource(const QUrl& url) override;
};
} // namespace mixxx
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