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#pragma once
#include <FLAC/stream_decoder.h>
#include <QFile>
#include "sources/soundsourceprovider.h"
#include "util/readaheadsamplebuffer.h"
namespace mixxx {
class SoundSourceFLAC final : public SoundSource {
public:
explicit SoundSourceFLAC(const QUrl& url);
~SoundSourceFLAC() override;
void close() override;
// Internal callbacks
FLAC__StreamDecoderReadStatus flacRead(FLAC__byte buffer[], size_t* bytes);
FLAC__StreamDecoderSeekStatus flacSeek(FLAC__uint64 offset);
FLAC__StreamDecoderTellStatus flacTell(FLAC__uint64* offset);
FLAC__StreamDecoderLengthStatus flacLength(FLAC__uint64* length);
FLAC__bool flacEOF();
FLAC__StreamDecoderWriteStatus flacWrite(const FLAC__Frame* frame,
const FLAC__int32* const buffer[]);
void flacMetadata(const FLAC__StreamMetadata* metadata);
void flacError(FLAC__StreamDecoderErrorStatus status);
protected:
ReadableSampleFrames readSampleFramesClamped(
const WritableSampleFrames& sampleFrames) override;
private:
OpenResult tryOpen(
OpenMode mode,
const OpenParams& params) override;
QFile m_file;
FLAC__StreamDecoder* m_decoder;
// misc bits about the flac format:
// flac encodes from and decodes to LPCM in blocks, each block is made up of
// subblocks (one for each chan)
// flac stores in 'frames', each of which has a header and a certain number
// of subframes (one for each channel)
SINT m_maxBlocksize; // in time samples (audio samples = time samples * chanCount)
SINT m_bitsPerSample;
ReadAheadSampleBuffer m_sampleBuffer;
void invalidateCurFrameIndex() {
m_curFrameIndex = frameIndexMax();
}
SINT m_curFrameIndex;
};
class SoundSourceProviderFLAC : public SoundSourceProvider {
public:
static const QString kDisplayName;
static const QStringList kSupportedFileExtensions;
QString getDisplayName() const override {
return kDisplayName;
}
QStringList getSupportedFileExtensions() const override {
return kSupportedFileExtensions;
}
SoundSourceProviderPriority getPriorityHint(
const QString& supportedFileExtension) const override;
SoundSourcePointer newSoundSource(const QUrl& url) override {
return newSoundSourceFromUrl<SoundSourceFLAC>(url);
}
};
} // namespace mixxx
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