/*      Copyright 2000-2008, Ingo Weinhold <ingo_weinhold@gmx.de>,
 *      All Rights Reserved. Distributed under the terms of the MIT license.
 */
#ifndef AUDIO_SUPPLIER_H
#define AUDIO_SUPPLIER_H


/*!     This class is an interface used by the AudioProducer to retreive the
        audio data to be played. */


#include <MediaDefs.h>


class AudioProducer;

class AudioSupplier {
public:
                                                                AudioSupplier();
        virtual                                         ~AudioSupplier();

        virtual void                            SetAudioProducer(AudioProducer* producer);

        virtual status_t                        InitCheck() const;

        virtual bigtime_t                       InitialLatency() const = 0;

        virtual status_t                        GetFrames(void* buffer, int64 frameCount,
                                                                        bigtime_t startTime,
                                                                        bigtime_t endTime) = 0;

        virtual void                            SetFormat(const media_format& format) = 0;

protected:
        AudioProducer*                          fAudioProducer;
};


#endif  // AUDIO_SUPPLIER_H