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spa: make a new FREEWHEEL clock flag

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When freewheeling, the clock is going faster than real time.
When freewheeling, skip samples in alsa sink/source.
This commit is contained in:
Wim Taymans 2021-05-06 18:14:07 +02:00
parent fab199d5b9
commit efc497a38a
6 changed files with 22 additions and 2 deletions
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1
spa/include/spa/node/io.h
View file

@ -125,6 +125,7 @@ struct spa_io_range {
* since the provider was last started.
*/
struct spa_io_clock {
#define SPA_IO_CLOCK_FLAG_FREEWHEEL (1u<<0)
uint32_t flags; /**< clock flags */
uint32_t id; /**< unique clock id, set by application */
char name[64]; /**< clock name prefixed with API, set by node. The clock name

5
spa/plugins/alsa/alsa-pcm-sink.c
View file

@ -640,8 +640,9 @@ static int impl_node_process(void *object)
spa_log_trace_fp(this->log, NAME " %p: process %d %d/%d", this, input->status,
input->buffer_id,
this->n_buffers);
if (input->status == SPA_STATUS_HAVE_DATA &&
if (this->position && this->position->clock.flags & SPA_IO_CLOCK_FLAG_FREEWHEEL) {
input->status = SPA_STATUS_NEED_DATA;
} else if (input->status == SPA_STATUS_HAVE_DATA &&
input->buffer_id < this->n_buffers) {
struct buffer *b = &this->buffers[input->buffer_id];

6
spa/plugins/alsa/alsa-pcm-source.c
View file

@ -666,6 +666,12 @@ static int impl_node_process(void *object)
spa_alsa_recycle_buffer(this, io->buffer_id);
io->buffer_id = SPA_ID_INVALID;
}
if (this->position && this->position->clock.flags & SPA_IO_CLOCK_FLAG_FREEWHEEL) {
spa_log_info(this->log, NAME " %p:freewheel", this);
io->status = SPA_STATUS_HAVE_DATA;
io->buffer_id = 0;
return SPA_STATUS_HAVE_DATA;
}
if (spa_list_is_empty(&this->ready) && this->following)
spa_alsa_read(this, 0);