codec.h

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/*
 * Copyright (c) 2013-2023 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.
 *
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 *    used to endorse or promote products derived from this software without
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 *
 * 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
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 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef AUDIO_CODEC_H_
#define AUDIO_CODEC_H_
 
#include "audio/types.h"
 
#define AUDIO_COMPRESS_ABI_VERSION 4
 
typedef enum {
        AUDIO_CODER,
        AUDIO_DECODER
} audio_codec_direction_t;
 
struct audio_compress_info {
        const audio_codec_t *supported_codecs;
        void *(*init)(audio_codec_t, audio_codec_direction_t, bool, int bitrate);
        audio_channel *(*compress)(void *, audio_channel *);
        audio_channel *(*decompress)(void *, audio_channel *);
        const int *(*get_samplerates)(void *);
        const char *(*get_codec_info)(void *, size_t buflen, char *buffer);
        void (*done)(void *);
};
 
typedef struct {
        const char *name;
        uint32_t    tag;
} audio_codec_info_t;
 
#ifdef __cplusplus
#include <string>
#include <tuple>
struct audio_codec_state;
 
struct audio_codec_state *audio_codec_init(audio_codec_t audio_codec, audio_codec_direction_t);
struct audio_codec_state *audio_codec_init_cfg(const char *audio_codec_cfg, audio_codec_direction_t);
struct audio_codec_state *audio_codec_reconfigure(struct audio_codec_state *old,
                audio_codec_t audio_codec, audio_codec_direction_t);
audio_frame2 audio_codec_compress(struct audio_codec_state *, const audio_frame2 *);
audio_frame2 audio_codec_decompress(struct audio_codec_state *, audio_frame2 *);
const int   *audio_codec_get_supported_samplerates(struct audio_codec_state *);
void audio_codec_done(struct audio_codec_state *);
 
std::vector<std::tuple<audio_codec_info_t, bool, std::string>>
get_audio_codec_list();
#endif
 
#ifdef __cplusplus
extern "C" {
#endif // defined __cplusplus
void list_audio_codecs(void);
 
struct audio_codec_params {
        audio_codec_t codec;
        int           sample_rate;
        int           bitrate;
};
struct audio_codec_params parse_audio_codec_params(const char *ccfg);
 
const char *get_name_to_audio_codec(audio_codec_t codec);
uint32_t get_audio_tag(audio_codec_t codec);
audio_codec_t get_audio_codec_to_tag(uint32_t audio_tag);
 
#ifdef __cplusplus
}
#endif // defined __cplusplus
 
#endif /* AUDIO_CODEC_H */