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bluez5: Workaround incorrect SCO MTU

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It seems that some BT adapters don't return correct SCO MTU, see
https://marc.info/?t=148586768600002&r=1&w=2
Do not try to autodetect the MTU and use a fix MTU size of 48 bytes.
This commit is contained in:
Frédéric Danis 2020-07-17 18:05:31 +02:00
parent 06a6e11806
commit 2d91e62a19
3 changed files with 11 additions and 32 deletions
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14
spa/plugins/bluez5/sco-source.c
View file

@ -117,7 +117,6 @@ struct impl {
struct timespec now;
uint32_t sample_count;
uint32_t read_mtu;
};
#define NAME "sco-source"
@ -337,7 +336,7 @@ static void sco_on_ready_read(struct spa_source *source)
datas = port->current_buffer->buf->datas;
/* read */
size_read = read_data(this, (uint8_t *)datas[0].data + port->ready_offset, this->read_mtu);
size_read = read_data(this, (uint8_t *)datas[0].data + port->ready_offset, this->transport->read_mtu);
if (size_read < 0) {
spa_log_error(this->log, "failed to read data");
goto stop;
@ -346,7 +345,7 @@ static void sco_on_ready_read(struct spa_source *source)
/* send buffer if full */
port->ready_offset += size_read;
if ((this->read_mtu + port->ready_offset) > (this->props.max_latency * port->frame_size)) {
if ((this->transport->read_mtu + port->ready_offset) > (this->props.max_latency * port->frame_size)) {
datas[0].chunk->offset = 0;
datas[0].chunk->size = port->ready_offset;
datas[0].chunk->stride = port->frame_size;
@ -1065,15 +1064,6 @@ impl_init(const struct spa_handle_factory *factory,
&this->transport_listener, &transport_events, this);
this->sock_fd = -1;
/* TODO: For now, we always use an MTU size of 48 bytes like bluezalsa
* because the MTU size returned by the kernel is incorrect (or our
* interpretation of it) */
#if 0
this->read_mtu = this->transport->read_mtu;
#else
this->read_mtu = 48;
#endif
return 0;
}