/**
 * @file   utils/audio_buffer.h
 * @author Martin Pulec     <pulec@cesnet.cz>
 */
/*
 * Copyright (c) 2016 CESNET z.s.p.o.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of CESNET nor the names of its contributors may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef AUDIO_BUFFER_H_
#define AUDIO_BUFFER_H_

#ifdef __cplusplus
extern "C" {
#endif

struct audio_buffer;
typedef struct audio_buffer audio_buffer_t;

struct audio_buffer *audio_buffer_init(int sample_rate, int bps, int ch_count, int suggested_latency_ms);
void audio_buffer_destroy(struct audio_buffer *buf);
int audio_buffer_read(struct audio_buffer *buf, char *out, int max_len);
void audio_buffer_write(struct audio_buffer *buf, const char *in, int len);

// used also for ring buffer;
struct audio_buffer_api {
        void (*destroy)(void *buf);
        int (*read)(void *buf, char *out, int max_len);
        void (*write)(void *buf, const char *in, int len);
};

extern struct audio_buffer_api audio_buffer_fns;

#ifdef __cplusplus
}
#endif

#endif /* AUDIO_BUFFER_H_ */