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#ifndef MIXXX_LEGACYAUDIOSOURCE_H
#define MIXXX_LEGACYAUDIOSOURCE_H
#include "util/types.h"
namespace mixxx {
// The legacy API that has been deprecated.
// Only required for SoundSourceCoreAudio.
class LegacyAudioSource {
public:
virtual ~LegacyAudioSource() = default;
// Adjusts the current frame seek index:
// - Precondition: isValidFrameIndex(frameIndex) == true
// - The seek position in seconds is frameIndex / sampleRate()
// Returns the actual current frame index which may differ from the
// requested index if the source does not support accurate seeking.
virtual SINT seekSampleFrame(SINT frameIndex) = 0;
// Fills the buffer with samples from each channel starting
// at the current frame seek position.
//
// The implicit minimum required capacity of the sampleBuffer is
// sampleBufferSize = frames2samples(numberOfFrames)
// Samples in the sampleBuffer are stored as consecutive sample
// frames with samples from each channel interleaved.
//
// Returns the actual number of frames that have been read which
// might be lower than the requested number of frames when the end
// of the audio stream has been reached. The current frame seek
// position is moved forward towards the next unread frame.
virtual SINT readSampleFrames(
SINT numberOfFrames,
CSAMPLE* sampleBuffer) = 0;
};
} // namespace mixxx
#endif // MIXXX_LEGACYAUDIOSOURCE_H
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