void app_main(void)
{
audio_pipeline_handle_t pipeline;
audio_element_handle_t i2s_stream_writer, mp3_decoder;
esp_log_level_set("*", ESP_LOG_WARN);
esp_log_level_set(TAG, ESP_LOG_INFO);
ESP_LOGI(TAG, "[ 1 ] Start audio codec chip");
audio_hal_codec_config_t audio_hal_codec_cfg = AUDIO_HAL_ES8388_DEFAULT();
audio_hal_handle_t hal = audio_hal_init(&audio_hal_codec_cfg, 0);
audio_hal_ctrl_codec(hal, AUDIO_HAL_CODEC_MODE_DECODE, AUDIO_HAL_CTRL_START);
ESP_LOGI(TAG, "[ 2 ] Create audio pipeline, add all elements to pipeline, and subscribe pipeline event");
audio_pipeline_cfg_t pipeline_cfg = DEFAULT_AUDIO_PIPELINE_CONFIG();
pipeline = audio_pipeline_init(&pipeline_cfg);
mem_assert(pipeline);
ESP_LOGI(TAG, "[2.1] Create mp3 decoder to decode mp3 file and set custom read callback");
mp3_decoder_cfg_t mp3_cfg = DEFAULT_MP3_DECODER_CONFIG();
mp3_decoder = mp3_decoder_init(&mp3_cfg);
audio_element_set_read_cb(mp3_decoder, mp3_music_read_cb, NULL);
ESP_LOGI(TAG, "[2.2] Create i2s stream to write data to codec chip");
i2s_stream_cfg_t i2s_cfg = I2S_STREAM_CFG_DEFAULT();
i2s_cfg.type = AUDIO_STREAM_WRITER;
i2s_stream_writer = i2s_stream_init(&i2s_cfg);
ESP_LOGI(TAG, "[2.3] Register all elements to audio pipeline");
audio_pipeline_register(pipeline, mp3_decoder, "mp3");
audio_pipeline_register(pipeline, i2s_stream_writer, "i2s");
ESP_LOGI(TAG, "[2.4] Link it together [mp3_music_read_cb]-->mp3_decoder-->i2s_stream-->[codec_chip]");
audio_pipeline_link(pipeline, (const char *[]) {"mp3", "i2s"}, 2);
struct mp3_decoder* mp3_decoder_create()
{
struct mp3_decoder* decoder;
/* allocate object */
decoder = (struct mp3_decoder*) rt_malloc (sizeof(struct mp3_decoder));
if (decoder != RT_NULL)
{
mp3_decoder_init(decoder);
}
return decoder;
}
