samples: Bluetooth: Broadcast sink: Refactor audio RX path

Refactor everything related to RX in the sample.
The existing code will moved to new files with more specific
functionality, so that each file will become cleaner and use
fewer #ifdefs.

The USB part will be refactored a bit to follow the design used
by the LE audio shell, to make it easier to maintain both in
a similar way.

Signed-off-by: Emil Gydesen <[email protected]>

Author: Thalley

samples/bluetooth/bap_broadcast_sink/CMakeLists.txt

@@ -6,6 +6,10 @@ project(bap_unicast_server)
 
 target_sources(app PRIVATE
   src/main.c
+  src/stream_rx.c
 )
 
+zephyr_sources_ifdef(CONFIG_LIBLC3 src/lc3.c)
+zephyr_sources_ifdef(CONFIG_USB_DEVICE_AUDIO src/usb.c)
+
 zephyr_library_include_directories(${ZEPHYR_BASE}/samples/bluetooth)

samples/bluetooth/bap_broadcast_sink/Kconfig

@@ -80,4 +80,11 @@ config TARGET_BROADCAST_CHANNEL
 	  Channel Audio Location to sync to. These corresponds to the bt_audio_location,
 	  supporting mono, left and right channels
 
+config INFO_REPORTING_INTERVAL
+	int "Number of SDUs received between each information report"
+	default 1000
+	help
+	  Determines how often information about received data is logged.
+	  Set to 0 to disable reporting.
+
 source "Kconfig.zephyr"

samples/bluetooth/bap_broadcast_sink/prj.conf

@@ -12,8 +12,8 @@ CONFIG_BT_ISO_SYNC_RECEIVER=y
 CONFIG_BT_BAP_BROADCAST_SINK=y
 CONFIG_BT_BAP_SCAN_DELEGATOR=y
 CONFIG_BT_ISO_MAX_CHAN=2
-# Allocate 2 RX buffers per channel
-CONFIG_BT_ISO_RX_BUF_COUNT=4
+# Allocate 4 RX buffers per channel
+CONFIG_BT_ISO_RX_BUF_COUNT=8
 CONFIG_BT_BAP_BROADCAST_SNK_SUBGROUP_COUNT=2
 CONFIG_BT_BAP_BROADCAST_SNK_STREAM_COUNT=2
 CONFIG_BT_BAP_BASS_MAX_SUBGROUPS=2