decoder_backend_t Struct Reference

One format backend (MP3 or WAV). Single-stream: one open at a time. More...

#include <decoder_backend.h>

Data Fields
esp_err_t(*	open )(FILE *f, decoder_format_t *fmt)
esp_err_t(*	read )(void *pcm, size_t cap_bytes, size_t *got_bytes)
void(*	close )(void)

Detailed Description

One format backend (MP3 or WAV). Single-stream: one open at a time.

Field Documentation

close

void(* decoder_backend_t::close) (void)

Free backend state. Does not close the FILE* (the facade owns it).

open

esp_err_t(* decoder_backend_t::open) (FILE *f, decoder_format_t *fmt)

Read the header from f (positioned at byte 0) and fill fmt; init backend state.

read

esp_err_t(* decoder_backend_t::read) (void *pcm, size_t cap_bytes, size_t *got_bytes)

Decode the next chunk into pcm; *got_bytes is 0 at end of file.

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The documentation for this struct was generated from the following file:

• components/services/audio/decoder_backend.h