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audio-pipeline.rst

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Audio Pipeline

Example

audio_element_handle_t first_el, mid_el, last_el;
audio_element_cfg_t el_cfg = DEFAULT_AUDIO_ELEMENT_CONFIG();

el_cfg.open = _el_open;
el_cfg.read = _el_read;
el_cfg.process = _el_process;
el_cfg.close = _el_close;
first_el = audio_element_init(&el_cfg, "first");
TEST_ASSERT_NOT_NULL(first_el);

el_cfg.read = NULL;
el_cfg.write = NULL;
mid_el = audio_element_init(&el_cfg, "mid");
TEST_ASSERT_NOT_NULL(mid_el);
el_cfg.write = _el_write;
last_el = audio_element_init(&el_cfg, "last");
TEST_ASSERT_NOT_NULL(last_el);

audio_pipeline_cfg_t pipeline_cfg = DEFAULT_AUDIO_PIPELINE_CONFIG();
audio_pipeline_handle_t pipeline = audio_pipeline_init(&pipeline_cfg);
TEST_ASSERT_NOT_NULL(pipeline);
TEST_ASSERT_EQUAL(ESP_OK, audio_pipeline_register(pipeline, first_el, mid_el, last_el));
TEST_ASSERT_EQUAL(ESP_OK, audio_pipeline_link(pipeline, (const char *[]){"first", "mid", "last"}, 3));