sink.h

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// SPDX-License-Identifier: Apache-2.0
#pragma once
 
#include "audio_player/audio.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum {
    SINK_CAP_HW_VOLUME = 1u << 0,   
    SINK_CAP_DOP = 1u << 1,         
    SINK_CAP_BITPERFECT = 1u << 2,
    SINK_CAP_RATE_SWITCH = 1u << 3, 
    SINK_CAP_DITHERS = 1u << 4,     
};
 
typedef struct audio_sink audio_sink_t;
 
struct audio_sink {
    const char *name;   
    uint32_t caps;
    void *ctx;
 
    int (*negotiate)(audio_sink_t *s, const audio_format_t *src, audio_format_t *out);
    int (*open)(audio_sink_t *s, const audio_format_t *fmt);
    int32_t (*write)(audio_sink_t *s, const int32_t *pcm, uint32_t frames, uint32_t timeout_ms);
    void (*pause)(audio_sink_t *s, bool paused);   
    void (*flush)(audio_sink_t *s);                
    int (*set_volume_db)(audio_sink_t *s, float db);  
    uint32_t (*buffered_frames)(audio_sink_t *s);  
    void (*describe)(audio_sink_t *s, char *out, size_t out_size);
    void (*close)(audio_sink_t *s);
};
 
#ifdef __cplusplus
}
#endif