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bluez5: report latency to rendering when in A2DP sink role

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Now that BlueZ supports delay reporting in A2DP sink role, implement
that.

Report value that gives the total latency between packet reception and
audio rendering.

Also make Latency parameter in media-source to be not just a dummy
value.
This commit is contained in:
Pauli Virtanen 2024-11-29 19:44:31 +02:00
parent 7bc84305e6
commit 2847d90b4b
4 changed files with 159 additions and 17 deletions
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28
spa/plugins/bluez5/decode-buffer.h
View file

@ -200,18 +200,30 @@ static void spa_bt_decode_buffer_recover(struct spa_bt_decode_buffer *this)
spa_bt_rate_control_init(&this->ctl, level);
}
static SPA_UNUSED
void spa_bt_decode_buffer_set_target_latency(struct spa_bt_decode_buffer *this, int32_t samples)
static inline void spa_bt_decode_buffer_set_target_latency(struct spa_bt_decode_buffer *this, int32_t samples)
{
this->target = samples;
}
static SPA_UNUSED
void spa_bt_decode_buffer_set_max_latency(struct spa_bt_decode_buffer *this, int32_t samples)
static inline void spa_bt_decode_buffer_set_max_latency(struct spa_bt_decode_buffer *this, int32_t samples)
{
this->max_target = samples;
}
static inline int32_t spa_bt_decode_buffer_get_target(struct spa_bt_decode_buffer *this)
{
const int32_t packet_size = SPA_CLAMP(this->packet_size.max, 0, INT32_MAX/8);
const int32_t max_buf = (this->buffer_size - this->buffer_reserve) / this->frame_size;
int32_t target;
if (this->target)
target = this->target;
else
target = BUFFERING_TARGET(this->spike.max, packet_size, max_buf);
return SPA_MIN(target, this->max_target);
}
static void spa_bt_decode_buffer_process(struct spa_bt_decode_buffer *this, uint32_t samples, uint32_t duration)
{
const uint32_t data_size = samples * this->frame_size;
@ -245,7 +257,6 @@ static void spa_bt_decode_buffer_process(struct spa_bt_decode_buffer *this, uint
if (this->received) {
const uint32_t avg_period = (uint64_t)this->rate * BUFFERING_SHORT_MSEC / 1000;
const int32_t max_buf = (this->buffer_size - this->buffer_reserve) / this->frame_size;
int32_t level, target;
/* Track buffer level */
@ -256,12 +267,7 @@ static void spa_bt_decode_buffer_process(struct spa_bt_decode_buffer *this, uint
spa_bt_ptp_update(&this->spike, (int32_t)(this->ctl.avg - level), this->prev_consumed);
/* Update target level */
if (this->target)
target = this->target;
else
target = BUFFERING_TARGET(this->spike.max, packet_size, max_buf);
target = SPA_MIN(target, this->max_target);
target = spa_bt_decode_buffer_get_target(this);
if (level > SPA_MAX(4 * target, 2*(int32_t)duration) &&
avail > data_size) {