9  * SPDX-License-Identifier: Apache-2.0
65 /* USB consumer callback, called every 1ms, consumes data from ring-buffer */
74 		/* no-op as we have no streams that receive data */  in usb_data_request_cb()
84 	/* This may fail without causing issues since usb_audio_data is 0-initialized */  in usb_data_request_cb()
136 	/* Send frames to USB - If we only have a single channel we mix it to stereo */  in bap_usb_send_frames_to_usb()
225 		return -EINVAL;  in bap_usb_add_frame_to_usb()
231 		return -EINVAL;  in bap_usb_add_frame_to_usb()
237 		LOG_DBG("Cannot mix and match mono with left or right");  in bap_usb_add_frame_to_usb()
239 		return -EINVAL;  in bap_usb_add_frame_to_usb()
242 	/* Check if the frame can be combined with a previous frame from another channel, of if  in bap_usb_add_frame_to_usb()
246 	 * same, there are additional checks to see if we have received more left than right frames,  in bap_usb_add_frame_to_usb()
252 		return -ENOEXEC;  in bap_usb_add_frame_to_usb()
254 		/* We are getting new data - Send existing data to ring buffer */  in bap_usb_add_frame_to_usb()
260 			/* We are receiving left again before a right, send to USB */  in bap_usb_add_frame_to_usb()
263 			/* We are receiving right again before a left, send to USB */  in bap_usb_add_frame_to_usb()
279 			return -ENOMEM;  in bap_usb_add_frame_to_usb()
285 			LOG_WRN("Could not add more right frames");  in bap_usb_add_frame_to_usb()
287 			return -ENOMEM;  in bap_usb_add_frame_to_usb()
296 			return -ENOMEM;  in bap_usb_add_frame_to_usb()
304 		return -EINVAL;  in bap_usb_add_frame_to_usb()
329 	return (USB_SAMPLE_CNT * sh_stream->lc3_frame_duration_us) / USEC_PER_MSEC;  in bap_usb_get_read_cnt()
339 	if (sh_stream->is_tx) {  in stream_cb()
341 			(sh_stream->lc3_chan_allocation & BT_AUDIO_LOCATION_FRONT_LEFT) != 0;  in stream_cb()
343 			(sh_stream->lc3_chan_allocation & BT_AUDIO_LOCATION_FRONT_RIGHT) != 0;  in stream_cb()
345 		const bool is_mono = sh_stream->lc3_chan_allocation == BT_AUDIO_LOCATION_MONO_AUDIO;  in stream_cb()
352 			read_idx = MIN(sh_stream->tx.left_read_idx, sh_stream->tx.right_read_idx);  in stream_cb()
354 			read_idx = sh_stream->tx.left_read_idx;  in stream_cb()
356 			read_idx = sh_stream->tx.right_read_idx;  in stream_cb()
367 				sh_stream->tx.left_read_idx = write_index;  in stream_cb()
368 				sh_stream->tx.right_read_idx = write_index;  in stream_cb()
390 	pcm = (int16_t *)buf->data;  in usb_data_received_cb()
392 	/* Split the data into left and right as LC3 uses LLLLRRRR instead of LRLRLRLR as USB  in usb_data_received_cb()
394 	 * Since the left and right buffer sizes are a factor of USB_SAMPLE_CNT, then we can always  in usb_data_received_cb()
406 		/* Overflow so that we start overwriting oldest */  in usb_data_received_cb()
424 	const bool has_left = (sh_stream->lc3_chan_allocation & BT_AUDIO_LOCATION_FRONT_LEFT) != 0;  in bap_usb_can_get_full_sdu()
426 		(sh_stream->lc3_chan_allocation & BT_AUDIO_LOCATION_FRONT_RIGHT) != 0;  in bap_usb_can_get_full_sdu()
428 	const bool is_mono = sh_stream->lc3_chan_allocation == BT_AUDIO_LOCATION_MONO_AUDIO;  in bap_usb_can_get_full_sdu()
430 	const uint32_t retrieve_cnt = read_cnt * sh_stream->lc3_frame_blocks_per_sdu;  in bap_usb_can_get_full_sdu()
437 		read_idx = MIN(sh_stream->tx.left_read_idx, sh_stream->tx.right_read_idx);  in bap_usb_can_get_full_sdu()
439 		read_idx = sh_stream->tx.left_read_idx;  in bap_usb_can_get_full_sdu()
441 		read_idx = sh_stream->tx.right_read_idx;  in bap_usb_can_get_full_sdu()
447 		buffer_cnt = write_index - read_idx;  in bap_usb_can_get_full_sdu()
450 		buffer_cnt = write_index + (USB_IN_RING_BUF_SIZE - read_idx);  in bap_usb_can_get_full_sdu()
471  * Reads @p size octets from src, handling wrapping and returns the new idx
493 		const size_t first_read_cnt = USB_IN_RING_BUF_SIZE - idx;  in usb_ring_buf_get()
494 		const size_t second_read_cnt = cnt - first_read_cnt;  in usb_ring_buf_get()
514 		sh_stream->tx.left_read_idx = usb_ring_buf_get(  in bap_usb_get_frame()
515 			buffer, usb_in_left_ring_buffer, sh_stream->tx.left_read_idx, read_cnt);  in bap_usb_get_frame()
517 		sh_stream->tx.right_read_idx = usb_ring_buf_get(  in bap_usb_get_frame()
518 			buffer, usb_in_right_ring_buffer, sh_stream->tx.right_read_idx, read_cnt);  in bap_usb_get_frame()
539 		return -EIO;  in bap_usb_init()
556 		err -= NRFX_ERROR_BASE_NUM;  in bap_usb_init()