decoder_8h_source.html

#pragma once


#include "esp_err.h"

#include <stdint.h>

#include <stddef.h>


#define DECODER_READ_BUF_BYTES  (2304 * 4)


typedef struct {

    uint32_t rate_hz;

    uint8_t  channels;

    uint8_t  bits;

    uint32_t duration_ms;

} decoder_format_t;


esp_err_t decoder_open(const char *path);


esp_err_t decoder_format(decoder_format_t *fmt);


esp_err_t decoder_read(void *pcm, size_t cap_bytes, size_t *got_bytes);


esp_err_t decoder_close(void);


decoder_format
esp_err_t decoder_format(decoder_format_t *fmt)
Get the PCM format of the open stream.
Definition decoder.c:80

decoder_read
esp_err_t decoder_read(void *pcm, size_t cap_bytes, size_t *got_bytes)
Decode the next chunk of audio into pcm.
Definition decoder.c:87

decoder_open
esp_err_t decoder_open(const char *path)
Open an audio file, pick the backend, and read its format.
Definition decoder.c:53

decoder_close
esp_err_t decoder_close(void)
Close the stream and free the decoder. Safe to call when nothing is open.
Definition decoder.c:93

decoder_format_t
PCM format of the open stream, read once after decoder_open().
Definition decoder.h:44

decoder_format_t::channels
uint8_t channels
Definition decoder.h:46

decoder_format_t::duration_ms
uint32_t duration_ms
Definition decoder.h:49

decoder_format_t::rate_hz
uint32_t rate_hz
Definition decoder.h:45

decoder_format_t::bits
uint8_t bits
Definition decoder.h:47