Bluetooth: BAP: Shell: Add support for decoding LC3 data

Add support for decoding incoming LC3 data. At this point we only instantiate a single LC3 decoder, so only one frequency and duration is supported. Signed-off-by: Emil Gydesen <[email protected]>
zephyrproject-rtos · Mar 8, 2024 · ac3006d · ac3006d
1 parent 39049db
commit ac3006d
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Showing 2 changed files with 419 additions and 86 deletions.
diff --git a/subsys/bluetooth/audio/shell/audio.h b/subsys/bluetooth/audio/shell/audio.h
@@ -41,6 +41,10 @@ size_t pbp_ad_data_add(struct bt_data data[], size_t data_size);
 #include <zephyr/bluetooth/audio/bap_lc3_preset.h>
 #include <zephyr/bluetooth/audio/cap.h>
 
+#if defined(CONFIG_LIBLC3)
+#include "lc3.h"
+#endif /* CONFIG_LIBLC3 */
+
 #define LOCATION BT_AUDIO_LOCATION_FRONT_LEFT | BT_AUDIO_LOCATION_FRONT_RIGHT
 #define CONTEXT                                                                                    \
 	(BT_AUDIO_CONTEXT_TYPE_UNSPECIFIED | BT_AUDIO_CONTEXT_TYPE_CONVERSATIONAL |                \
@@ -62,12 +66,16 @@ struct shell_stream {
 	struct bt_cap_stream stream;
 	struct bt_audio_codec_cfg codec_cfg;
 	struct bt_audio_codec_qos qos;
+
 #if defined(CONFIG_LIBLC3)
 	uint32_t lc3_freq_hz;
 	uint32_t lc3_frame_duration_us;
 	uint16_t lc3_octets_per_frame;
-	uint8_t lc3_frames_per_sdu;
+	uint8_t lc3_frame_blocks_per_sdu;
+	enum bt_audio_location lc3_chan_allocation;
+	uint8_t lc3_chan_cnt;
 #endif /* CONFIG_LIBLC3 */
+
 #if defined(CONFIG_BT_AUDIO_TX)
 	int64_t connected_at_ticks; /* The uptime tick measured when stream was connected */
 	uint16_t seq_num;
@@ -78,13 +86,19 @@ struct shell_stream {
 	size_t lc3_sdu_cnt;
 #endif /* CONFIG_LIBLC3 */
 #endif /* CONFIG_BT_AUDIO_TX */
+
 #if defined(CONFIG_BT_AUDIO_RX)
 	struct bt_iso_recv_info last_info;
 	size_t lost_pkts;
 	size_t err_pkts;
 	size_t dup_psn;
 	size_t rx_cnt;
 	size_t dup_ts;
+#if defined(CONFIG_LIBLC3)
+	lc3_decoder_t lc3_decoder;
+	struct k_fifo in_fifo;
+	size_t decoded_cnt;
+#endif /* CONFIG_LIBLC3 */
 #endif /* CONFIG_BT_AUDIO_RX */
 };