decoder_wav.c File Reference

WAV backend: PCM RIFF/WAVE, 16-bit or 24-bit, mono or stereo, up to 192 kHz. More...

#include "decoder_backend.h"
#include "esp_log.h"
#include <stdlib.h>
#include <string.h>

Variables
const decoder_backend_t	decoder_wav_backend

Detailed Description

WAV backend: PCM RIFF/WAVE, 16-bit or 24-bit, mono or stereo, up to 192 kHz.

Every sample is expanded to the 32-bit MSB-justified word the ESP32 I2S peripheral expects: int16 shifted into the high 16 bits, WAV's packed 3-byte little-endian 24-bit samples into the high 24 bits (low byte 0). Mono is up-mixed to stereo.

Note

Développé avec l'assistance de Claude Opus 4.8 (Anthropic), sous la direction de Y. Dos Santos : spécification, revue et validation sur cible par l'auteur.

Variable Documentation

decoder_wav_backend

const decoder_backend_t decoder_wav_backend

Initial value:

                                            = {
    .open  = wav_open,
    .read  = wav_read,
    .close = wav_close,
}