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le_audio_demo_util_sink: use SDU interval for PLC

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This commit is contained in:
Matthias Ringwald 2023-10-05 11:10:49 +02:00
parent 922a5394a2
commit 79d6b6059c
1 changed files with 49 additions and 7 deletions
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56
example/le_audio_demo_util_sink.c
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@ -111,6 +111,8 @@ static bool stream_last_packet_received[MAX_CHANNELS];
static uint16_t stream_last_packet_sequence[MAX_CHANNELS];
static uint16_t group_last_packet_sequence;
static bool group_last_packet_received;
static uint16_t plc_timeout_initial_ms;
static uint16_t plc_timeout_subsequent_ms;
static uint32_t le_audio_demo_sink_lc3_frames;
static uint32_t samples_received;
@ -257,13 +259,23 @@ static void plc_check(uint16_t packet_sequence_number) {
static void plc_timeout(btstack_timer_source_t * timer) {
// Restart timer. This will loose sync with ISO interval, but if we stop caring if we loose that many packets
uint32_t frame_duration_ms = le_audio_demo_sink_frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 8 : 10;
btstack_run_loop_set_timer(timer, frame_duration_ms);
btstack_run_loop_set_timer(timer, plc_timeout_subsequent_ms);
btstack_run_loop_set_timer_handler(timer, plc_timeout);
btstack_run_loop_add_timer(timer);
// assume no packet received in iso interval
plc_check(group_last_packet_sequence + 1);
switch (le_audio_demo_sink_type){
case HCI_ISO_TYPE_CIS:
// assume no packet received in iso interval => FT packets missed
plc_check(group_last_packet_sequence + le_audio_demo_sink_flush_timeout);
break;
case HCI_ISO_TYPE_BIS:
// assume PTO not used => 1 packet missed
plc_check(group_last_packet_sequence + 1);
break;
default:
btstack_unreachable();
break;
}
}
void le_audio_demo_util_sink_init(const char * filename_wav){
@ -326,6 +338,22 @@ void le_audio_demo_util_sink_configure_unicast(uint8_t num_streams, uint8_t num_
uint32_t iso_interval_1250us, uint8_t flush_timeout){
le_audio_demo_sink_type = HCI_ISO_TYPE_CIS;
le_audio_demo_sink_flush_timeout = flush_timeout;
// set playback start: FT * ISO Interval + 10 ms
uint16_t playback_start_ms = flush_timeout * (iso_interval_1250us * 5 / 4) + 10;
uint16_t playback_start_samples = sampling_frequency_hz / 1000 * playback_start_ms;
playback_start_threshold_bytes = playback_start_samples * num_streams * num_channels_per_stream * 2;
printf("Playback: start %u ms (%u samples, %u bytes)\n", playback_start_ms, playback_start_samples, playback_start_threshold_bytes);
// set subsequent plc timeout: FT * ISO Interval
plc_timeout_subsequent_ms = flush_timeout * iso_interval_1250us * 5 / 4;
// set initial plc timeout:FT * ISO Interval + 4 ms
plc_timeout_initial_ms = plc_timeout_subsequent_ms + 4;
printf("PLC: initial timeout %u ms\n", plc_timeout_initial_ms);
printf("PLC: subsequent timeout %u ms\n", plc_timeout_subsequent_ms);
le_audio_demo_util_sink_configure_general(num_streams, num_channels_per_stream, sampling_frequency_hz,
frame_duration, octets_per_frame, iso_interval_1250us);
}
@ -335,6 +363,22 @@ void le_audio_demo_util_sink_configure_broadcast(uint8_t num_streams, uint8_t nu
uint32_t iso_interval_1250us, uint8_t pre_transmission_offset) {
le_audio_demo_sink_type = HCI_ISO_TYPE_BIS;
le_audio_demo_sink_pre_transmission_offset = pre_transmission_offset;
// set playback start: ISO Interval + 10 ms
uint16_t playback_start_ms = (iso_interval_1250us * 5 / 4) + 10;
uint16_t playback_start_samples = sampling_frequency_hz / 1000 * playback_start_ms;
playback_start_threshold_bytes = playback_start_samples * num_streams * num_channels_per_stream * 2;
printf("Playback: start %u ms (%u samples, %u bytes)\n", playback_start_ms, playback_start_samples, playback_start_threshold_bytes);
// set subsequent plc timeout: ISO Interval
plc_timeout_subsequent_ms = iso_interval_1250us * 5 / 4;
// set initial plc timeout: ISO Interval + 4 ms
plc_timeout_initial_ms = plc_timeout_subsequent_ms + 4;
printf("PLC: initial timeout %u ms\n", plc_timeout_initial_ms);
printf("PLC: subsequent timeout %u ms\n", plc_timeout_subsequent_ms);
le_audio_demo_util_sink_configure_unicast(num_streams, num_channels_per_stream, sampling_frequency_hz, frame_duration,
octets_per_frame, iso_interval_1250us, pre_transmission_offset);
}
@ -422,10 +466,8 @@ void le_audio_demo_util_sink_receive(uint8_t stream_index, uint8_t *packet, uint
le_audio_demo_sink_lc3_frames++;
// PLC
uint32_t frame_duration_ms = le_audio_demo_sink_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(&next_packet_timer, plc_timeout_initial_ms);
btstack_run_loop_set_timer_handler(&next_packet_timer, plc_timeout);
btstack_run_loop_add_timer(&next_packet_timer);