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btstack/test/le_audio/le_audio_unicast_sink.c
Matthias Ringwald c764140abd test/le_audio: add missing break
2022-11-14 12:33:27 +01:00

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/*
* Copyright (C) 2022 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
* GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define BTSTACK_FILE__ "le_audio_unicast_sink.c"
/*
* LE Audio Unicast Sink
* Until GATT Services are available, we encode LC3 config in advertising
*/
#include "btstack_config.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <fcntl.h> // open
#include <errno.h>
#include "ad_parser.h"
#include "bluetooth_data_types.h"
#include "bluetooth_company_id.h"
#include "bluetooth_gatt.h"
#include "btstack_debug.h"
#include "btstack_audio.h"
#include "btstack_event.h"
#include "btstack_run_loop.h"
#include "btstack_ring_buffer.h"
#include "btstack_stdin.h"
#include "btstack_util.h"
#include "gap.h"
#include "hci.h"
#include "hci_cmd.h"
#include "btstack_lc3.h"
#include "btstack_lc3_google.h"
#include "btstack_lc3plus_fraunhofer.h"
#ifdef HAVE_POSIX_FILE_IO
#include "wav_util.h"
#endif
//#define DEBUG_PLC
#ifdef DEBUG_PLC
#define printf_plc(...) printf(__VA_ARGS__)
#else
#define printf_plc(...) (void)(0);
#endif
// max config
#define MAX_CHANNELS 2
#define MAX_SAMPLES_PER_FRAME 480
// playback
#define MAX_NUM_LC3_FRAMES 15
#define MAX_BYTES_PER_SAMPLE 4
#define PLAYBACK_BUFFER_SIZE (MAX_NUM_LC3_FRAMES * MAX_SAMPLES_PER_FRAME * MAX_BYTES_PER_SAMPLE)
#define PLAYBACK_START_MS (MAX_NUM_LC3_FRAMES * 20 / 3)
// analysis
#define PACKET_PREFIX_LEN 10
#define ANSI_COLOR_RED "\x1b[31m"
#define ANSI_COLOR_GREEN "\x1b[32m"
#define ANSI_COLOR_YELLOW "\x1b[33m"
#define ANSI_COLOR_BLUE "\x1b[34m"
#define ANSI_COLOR_MAGENTA "\x1b[35m"
#define ANSI_COLOR_CYAN "\x1b[36m"
#define ANSI_COLOR_RESET "\x1b[0m"
static void show_usage(void);
static const char * filename_wav = "le_audio_unicast_sink.wav";
static enum {
APP_W4_WORKING,
APP_W4_SOURCE_ADV,
APP_W4_CIG_COMPLETE,
APP_W4_CIS_CREATED,
APP_STREAMING,
APP_IDLE,
} app_state = APP_W4_WORKING;
//
static btstack_packet_callback_registration_t hci_event_callback_registration;
// remote info
static char remote_name[20];
static bd_addr_t remote_addr;
static bd_addr_type_t remote_type;
static hci_con_handle_t remote_handle;
static bool count_mode;
static bool pts_mode;
static le_audio_cig_t cig;
static le_audio_cig_params_t cig_params;
// iso info
static bool framed_pdus;
static uint16_t frame_duration_us;
static uint8_t num_cis;
static hci_con_handle_t cis_con_handles[MAX_CHANNELS];
static bool cis_established[MAX_CHANNELS];
static unsigned int next_cis_index;
// lc3 codec config
static uint16_t sampling_frequency_hz;
static btstack_lc3_frame_duration_t frame_duration;
static uint16_t number_samples_per_frame;
static uint16_t octets_per_frame;
static uint8_t num_channels;
// lc3 decoder
static bool request_lc3plus_decoder = false;
static bool use_lc3plus_decoder = false;
static const btstack_lc3_decoder_t * lc3_decoder;
static int16_t pcm[MAX_CHANNELS * MAX_SAMPLES_PER_FRAME];
static btstack_lc3_decoder_google_t google_decoder_contexts[MAX_CHANNELS];
#ifdef HAVE_LC3PLUS
static btstack_lc3plus_fraunhofer_decoder_t fraunhofer_decoder_contexts[MAX_CHANNELS];
#endif
static void * decoder_contexts[MAX_NR_BIS];
// playback
static uint16_t playback_start_threshold_bytes;
static bool playback_active;
static uint8_t playback_buffer_storage[PLAYBACK_BUFFER_SIZE];
static btstack_ring_buffer_t playback_buffer;
// statistics
static bool last_packet_received[MAX_CHANNELS];
static uint16_t last_packet_sequence[MAX_CHANNELS];
static uint32_t last_packet_time_ms[MAX_CHANNELS];
static uint8_t last_packet_prefix[MAX_CHANNELS * PACKET_PREFIX_LEN];
static uint32_t lc3_frames;
static uint32_t samples_received;
static uint32_t samples_played;
static uint32_t samples_dropped;
static uint32_t last_samples_report_ms;
// PLC state
#define PLC_GUARD_MS 1
static btstack_timer_source_t next_packet_timer;
static uint16_t cached_iso_sdu_len;
static void le_audio_connection_sink_playback(int16_t * buffer, uint16_t num_samples){
// called from lower-layer but guaranteed to be on main thread
log_info("Playback: need %u, have %u", num_samples, btstack_ring_buffer_bytes_available(&playback_buffer) / (num_channels * 2));
samples_played += num_samples;
uint32_t bytes_needed = num_samples * num_channels * 2;
if (playback_active == false){
if (btstack_ring_buffer_bytes_available(&playback_buffer) >= playback_start_threshold_bytes) {
log_info("Playback started");
playback_active = true;
}
} else {
if (bytes_needed > btstack_ring_buffer_bytes_available(&playback_buffer)) {
log_info("Playback underrun");
printf("Playback Underrun\n");
// empty buffer
uint32_t bytes_read;
btstack_ring_buffer_read(&playback_buffer, (uint8_t *) buffer, bytes_needed, &bytes_read);
playback_active = false;
}
}
if (playback_active){
uint32_t bytes_read;
btstack_ring_buffer_read(&playback_buffer, (uint8_t *) buffer, bytes_needed, &bytes_read);
btstack_assert(bytes_read == bytes_needed);
} else {
memset(buffer, 0, bytes_needed);
}
}
static void setup_lc3_decoder(void){
uint8_t channel;
for (channel = 0 ; channel < num_channels ; channel++){
// pick decoder
void * decoder_context = NULL;
#ifdef HAVE_LC3PLUS
if (use_lc3plus_decoder){
decoder_context = &fraunhofer_decoder_contexts[channel];
lc3_decoder = btstack_lc3plus_fraunhofer_decoder_init_instance(decoder_context);
}
else
#endif
{
decoder_context = &google_decoder_contexts[channel];
lc3_decoder = btstack_lc3_decoder_google_init_instance(decoder_context);
}
decoder_contexts[channel] = decoder_context;
lc3_decoder->configure(decoder_context, sampling_frequency_hz, frame_duration, octets_per_frame);
}
number_samples_per_frame = btstack_lc3_samples_per_frame(sampling_frequency_hz, frame_duration);
btstack_assert(number_samples_per_frame <= MAX_SAMPLES_PER_FRAME);
}
static void close_files(void){
#ifdef HAVE_POSIX_FILE_IO
printf("Close files\n");
wav_writer_close();
#endif
}
static void enter_streaming(void){
// switch to lc3plus if requested and possible
use_lc3plus_decoder = request_lc3plus_decoder && (frame_duration == BTSTACK_LC3_FRAME_DURATION_10000US);
// init decoder
setup_lc3_decoder();
printf("Configure: %u channels, sampling rate %u, samples per frame %u, lc3plus %u\n", num_channels, sampling_frequency_hz, number_samples_per_frame, use_lc3plus_decoder);
#ifdef HAVE_POSIX_FILE_IO
// create wav file
printf("WAV file: %s\n", filename_wav);
wav_writer_open(filename_wav, num_channels, sampling_frequency_hz);
#endif
// init playback buffer
btstack_ring_buffer_init(&playback_buffer, playback_buffer_storage, PLAYBACK_BUFFER_SIZE);
// calc start threshold in bytes for PLAYBACK_START_MS
playback_start_threshold_bytes = (sampling_frequency_hz / 1000 * PLAYBACK_START_MS) * num_channels * 2;
// start playback
const btstack_audio_sink_t * sink = btstack_audio_sink_get_instance();
if (sink != NULL){
sink->init(num_channels, sampling_frequency_hz, le_audio_connection_sink_playback);
sink->start_stream();
}
}
static void start_scanning() {
app_state = APP_W4_SOURCE_ADV;
gap_set_scan_params(1, 0x30, 0x30, 0);
gap_start_scan();
printf("Start scan..\n");
}
static void create_cig() {
if (sampling_frequency_hz == 44100){
framed_pdus = 1;
// same config as for 48k -> frame is longer by 48/44.1
frame_duration_us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 8163 : 10884;
} else {
framed_pdus = 0;
frame_duration_us = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 7500 : 10000;
}
printf("Send: LE Set CIG Parameters\n");
num_cis = 1;
cig_params.cig_id = 0;
cig_params.num_cis = 1;
cig_params.sdu_interval_c_to_p = frame_duration_us;
cig_params.sdu_interval_p_to_c = frame_duration_us;
cig_params.worst_case_sca = 0; // 251 ppm to 500 ppm
cig_params.packing = 0; // sequential
cig_params.framing = framed_pdus;
cig_params.max_transport_latency_c_to_p = 40;
cig_params.max_transport_latency_p_to_c = 40;
uint8_t i;
for (i=0; i < num_cis; i++){
cig_params.cis_params[i].cis_id = i;
cig_params.cis_params[i].max_sdu_c_to_p = 0;
cig_params.cis_params[i].max_sdu_p_to_c = num_channels * octets_per_frame;
cig_params.cis_params[i].phy_c_to_p = 2; // 2M
cig_params.cis_params[i].phy_p_to_c = 2; // 2M
cig_params.cis_params[i].rtn_c_to_p = 2;
cig_params.cis_params[i].rtn_p_to_c = 2;
}
app_state = APP_W4_CIG_COMPLETE;
gap_cig_create(&cig, &cig_params);
}
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
bd_addr_t event_addr;
hci_con_handle_t cis_handle;
unsigned int i;
if (packet_type != HCI_EVENT_PACKET) return;
switch (packet[0]) {
case BTSTACK_EVENT_STATE:
switch(btstack_event_state_get_state(packet)) {
case HCI_STATE_WORKING:
#ifdef ENABLE_DEMO_MODE
if (app_state != APP_W4_WORKING) break;
start_scanning();
#else
show_usage();
#endif
break;
case HCI_STATE_OFF:
printf("Goodbye\n");
exit(0);
break;
default:
break;
}
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
if (hci_event_disconnection_complete_get_connection_handle(packet) == remote_handle){
printf("Disconnected, back to scanning\n");
// stop timer
btstack_run_loop_remove_timer(&next_packet_timer);
// close files
close_files();
// stop playback
const btstack_audio_sink_t * sink = btstack_audio_sink_get_instance();
if (sink != NULL){
sink->stop_stream();
}
start_scanning();
}
break;
case GAP_EVENT_ADVERTISING_REPORT:
{
if (app_state != APP_W4_SOURCE_ADV) break;
gap_event_advertising_report_get_address(packet, remote_addr);
uint8_t adv_size = gap_event_advertising_report_get_data_length(packet);
const uint8_t * adv_data = gap_event_advertising_report_get_data(packet);
ad_context_t context;
bool found = false;
remote_name[0] = '\0';
uint16_t uuid;
uint16_t company_id;
for (ad_iterator_init(&context, adv_size, adv_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) {
uint8_t data_type = ad_iterator_get_data_type(&context);
uint8_t size = ad_iterator_get_data_len(&context);
const uint8_t *data = ad_iterator_get_data(&context);
switch (data_type){
case BLUETOOTH_DATA_TYPE_MANUFACTURER_SPECIFIC_DATA:
company_id = little_endian_read_16(data, 0);
if (company_id == BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH){
// subtype = 0 -> le audio unicast source
uint8_t subtype = data[2];
if (subtype != 0) break;
// flags
uint8_t flags = data[3];
pts_mode = (flags & 1) != 0;
count_mode = (flags & 2) != 0;
// num channels
num_channels = data[4];
if (num_channels > 2) break;
// sampling frequency
sampling_frequency_hz = 1000 * data[5];
// frame duration
frame_duration = data[6] == 0 ? BTSTACK_LC3_FRAME_DURATION_7500US : BTSTACK_LC3_FRAME_DURATION_10000US;
// octets per frame
octets_per_frame = data[7];
// done
found = true;
}
break;
case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME:
case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME:
size = btstack_min(sizeof(remote_name) - 1, size);
memcpy(remote_name, data, size);
remote_name[size] = 0;
break;
default:
break;
}
}
if (!found) break;
remote_type = gap_event_advertising_report_get_address_type(packet);
pts_mode = false;
count_mode = false;
printf("Remote Broadcast source found, addr %s, name: '%s' (pts-mode: %u, count: %u)\n", bd_addr_to_str(remote_addr), remote_name, pts_mode, count_mode);
// stop scanning
app_state = APP_W4_CIS_CREATED;
gap_stop_scan();
gap_connect(remote_addr, remote_type);
break;
}
case HCI_EVENT_LE_META:
switch(hci_event_le_meta_get_subevent_code(packet)) {
case HCI_SUBEVENT_LE_CONNECTION_COMPLETE:
enter_streaming();
hci_subevent_le_connection_complete_get_peer_address(packet, event_addr);
remote_handle = hci_subevent_le_connection_complete_get_connection_handle(packet);
printf("Connected, remote %s, handle %04x\n", bd_addr_to_str(event_addr), remote_handle);
create_cig();
break;
default:
break;
}
case HCI_EVENT_META_GAP:
switch (hci_event_gap_meta_get_subevent_code(packet)){
case GAP_SUBEVENT_CIG_CREATED:
if (app_state == APP_W4_CIG_COMPLETE){
printf("CIS Connection Handles: ");
for (i=0; i < num_cis; i++){
cis_con_handles[i] = gap_subevent_cig_created_get_cis_con_handles(packet, i);
printf("0x%04x ", cis_con_handles[i]);
}
printf("\n");
next_cis_index = 0;
memset(last_packet_sequence, 0, sizeof(last_packet_sequence));
memset(last_packet_received, 0, sizeof(last_packet_received));
memset(pcm, 0, sizeof(pcm));
printf("Create CIS\n");
hci_con_handle_t acl_connection_handles[MAX_CHANNELS];
for (i=0; i < num_cis; i++){
acl_connection_handles[i] = remote_handle;
}
gap_cis_create(cig_params.cig_id, cis_con_handles, acl_connection_handles);
app_state = APP_W4_CIS_CREATED;
}
break;
case GAP_SUBEVENT_CIS_CREATED:
// only look for cis handle
cis_handle = gap_subevent_cis_created_get_cis_con_handle(packet);
for (i=0; i < num_cis; i++){
if (cis_handle == cis_con_handles[i]){
cis_established[i] = true;
}
}
// check for complete
bool complete = true;
for (i=0; i < num_cis; i++) {
complete &= cis_established[i];
}
if (complete) {
printf("All CIS Established\n");
next_cis_index = 0;
app_state = APP_STREAMING;
}
break;
default:
break;
}
break;
default:
break;
}
}
static void store_samples_in_ringbuffer(void){
#ifdef HAVE_POSIX_FILE_IO
// write wav samples
wav_writer_write_int16(num_channels * number_samples_per_frame, pcm);
#endif
// store samples in playback buffer
uint32_t bytes_to_store = num_channels * number_samples_per_frame * 2;
samples_received += number_samples_per_frame;
if (btstack_ring_buffer_bytes_free(&playback_buffer) >= bytes_to_store) {
btstack_ring_buffer_write(&playback_buffer, (uint8_t *) pcm, bytes_to_store);
} else {
printf("Samples dropped\n");
samples_dropped += number_samples_per_frame;
}
}
static void plc_do(void) {
// inject packet
uint8_t tmp_BEC_detect;
uint8_t BFI = 1;
uint8_t channel;
for (channel = 0; channel < num_channels; channel++){
(void) lc3_decoder->decode_signed_16(decoder_contexts[channel], NULL, BFI,
&pcm[channel], num_channels,
&tmp_BEC_detect);
}
store_samples_in_ringbuffer();
}
static void plc_timeout(btstack_timer_source_t * timer) {
// set timer again
uint32_t frame_duration_ms = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 8 : 10;
btstack_run_loop_set_timer(&next_packet_timer, frame_duration_ms);
btstack_run_loop_set_timer_handler(&next_packet_timer, plc_timeout);
btstack_run_loop_add_timer(&next_packet_timer);
printf_plc("- ISO, PLC for timeout\n");
plc_do();
}
static void iso_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
uint16_t header = little_endian_read_16(packet, 0);
hci_con_handle_t con_handle = header & 0x0fff;
uint8_t pb_flag = (header >> 12) & 3;
uint8_t ts_flag = (header >> 14) & 1;
uint16_t iso_load_len = little_endian_read_16(packet, 2);
uint16_t offset = 4;
uint32_t time_stamp = 0;
if (ts_flag){
uint32_t time_stamp = little_endian_read_32(packet, offset);
offset += 4;
}
uint32_t receive_time_ms = btstack_run_loop_get_time_ms();
uint16_t packet_sequence_number = little_endian_read_16(packet, offset);
offset += 2;
uint16_t header_2 = little_endian_read_16(packet, offset);
uint16_t iso_sdu_length = header_2 & 0x3fff;
uint8_t packet_status_flag = (uint8_t) (header_2 >> 14);
offset += 2;
if (iso_sdu_length == 0) return;
if (iso_sdu_length != num_channels * octets_per_frame) {
printf("ISO Length %u != %u * %u\n", iso_sdu_length, num_channels, octets_per_frame);
}
// infer channel from con handle - only works for up to 2 channels
uint8_t cis_channel = (con_handle == cis_con_handles[0]) ? 0 : 1;
if (count_mode){
// check for missing packet
uint16_t last_seq_no = last_packet_sequence[cis_channel];
uint32_t now = btstack_run_loop_get_time_ms();
bool packet_missed = (last_seq_no != 0) && ((last_seq_no + 1) != packet_sequence_number);
if (packet_missed){
// print last packet
printf("\n");
printf("%04x %10u %u ", last_seq_no, last_packet_time_ms[cis_channel], cis_channel);
printf_hexdump(&last_packet_prefix[num_channels * PACKET_PREFIX_LEN], PACKET_PREFIX_LEN);
last_seq_no++;
printf(ANSI_COLOR_RED);
while (last_seq_no < packet_sequence_number){
printf("%04x %u MISSING\n", last_seq_no, cis_channel);
last_seq_no++;
}
printf(ANSI_COLOR_RESET);
// print current packet
printf("%04x %10u %u ", packet_sequence_number, now, cis_channel);
printf_hexdump(&packet[offset], PACKET_PREFIX_LEN);
}
// cache current packet
last_packet_time_ms[cis_channel] = now;
last_packet_sequence[cis_channel] = packet_sequence_number;
memcpy(&last_packet_prefix[num_channels * PACKET_PREFIX_LEN], &packet[offset], PACKET_PREFIX_LEN);
} else {
if (last_packet_received[cis_channel]) {
printf_plc("ISO, receive %u\n", packet_sequence_number);
int16_t packet_sequence_delta = btstack_time16_delta(packet_sequence_number,
last_packet_sequence[cis_channel]);
if (packet_sequence_delta < 1) {
// drop delayed packet that had already been generated by PLC
printf_plc("- dropping delayed packet. Current sequence number %u, last received or generated by PLC: %u\n",
packet_sequence_number, last_packet_sequence[cis_channel]);
return;
}
// simple check
if (packet_sequence_number != last_packet_sequence[cis_channel] + 1) {
printf_plc("- BIS #%u, missing %u\n", cis_channel, last_packet_sequence[cis_channel] + 1);
}
} else {
printf_plc("BIS %u, first packet seq number %u\n", cis_channel, packet_sequence_number);
last_packet_received[cis_channel] = true;
}
// PLC for missing packets
while (true) {
uint16_t expected = last_packet_sequence[cis_channel]+1;
if (expected == packet_sequence_number){
break;
}
printf_plc("- ISO, PLC for %u\n", expected);
plc_do();
last_packet_sequence[cis_channel] = expected;
}
uint8_t channel;
for (channel = 0 ; channel < num_channels ; channel++){
// decode codec frame
uint8_t tmp_BEC_detect;
uint8_t BFI = 0;
(void) lc3_decoder->decode_signed_16(decoder_contexts[channel], &packet[offset], BFI,
&pcm[channel], num_channels,
&tmp_BEC_detect);
offset += octets_per_frame;
}
store_samples_in_ringbuffer();
log_info("Samples in playback buffer %5u", btstack_ring_buffer_bytes_available(&playback_buffer) / (num_channels * 2));
lc3_frames++;
// PLC
cached_iso_sdu_len = iso_sdu_length;
uint32_t frame_duration_ms = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 8 : 10;
uint32_t timeout_ms = frame_duration_ms * 5 / 2;
btstack_run_loop_remove_timer(&next_packet_timer);
btstack_run_loop_set_timer(&next_packet_timer, timeout_ms);
btstack_run_loop_set_timer_handler(&next_packet_timer, plc_timeout);
btstack_run_loop_add_timer(&next_packet_timer);
if (samples_received >= sampling_frequency_hz){
printf("LC3 Frames: %4u - samples received %5u, played %5u, dropped %5u\n", lc3_frames, samples_received, samples_played, samples_dropped);
samples_received = 0;
samples_dropped = 0;
samples_played = 0;
}
last_packet_time_ms[cis_channel] = receive_time_ms;
last_packet_sequence[cis_channel] = packet_sequence_number;
}
}
static void show_usage(void){
printf("\n--- LE Audio Unicast Sink Test Console ---\n");
printf("s - start scanning\n");
#ifdef HAVE_LC3PLUS
printf("q - use LC3plus decoder if 10 ms ISO interval is used\n");
#endif
printf("---\n");
}
static void stdin_process(char c){
switch (c){
case 's':
if (app_state != APP_W4_WORKING) break;
start_scanning();
break;
#ifdef HAVE_LC3PLUS
case 'q':
request_lc3plus_decoder = true;
break;
#endif
case '\n':
case '\r':
break;
default:
show_usage();
break;
}
}
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void) argv;
(void) argc;
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// register for ISO Packet
hci_register_iso_packet_handler(&iso_packet_handler);
// turn on!
hci_power_control(HCI_POWER_ON);
btstack_stdin_setup(stdin_process);
return 0;
}
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