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libpulseaudio: make latency configurable

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This commit is contained in:
Tom Yan 2018-07-26 06:17:26 +08:00 committed by Fredrik Fornwall
parent 83ba79c105
commit 36c4ffb4bf
1 changed files with 10 additions and 3 deletions
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13
packages/libpulseaudio/module-sles-sink.c
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@ -70,6 +70,7 @@ PA_MODULE_USAGE(
"sink_name=<name for the sink> "
"sink_properties=<properties for the sink> "
"rate=<sampling rate> "
"latency=<buffer length> "
);
#define DEFAULT_SINK_NAME "OpenSL ES sink"
@ -104,6 +105,7 @@ static const char* const valid_modargs[] = {
"sink_name",
"sink_properties",
"rate",
"latency",
NULL
};
@ -282,6 +284,7 @@ int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
pa_sink_new_data data;
size_t nbytes;
uint32_t latency = 0;
pa_assert(m);
@ -340,7 +343,13 @@ int pa__init(pa_module*m) {
pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
pa_sink_set_rtpoll(u->sink, u->rtpoll);
u->block_usec = BLOCK_USEC;
pa_modargs_get_value_u32(ma, "latency", &latency);
if (latency)
u->block_usec = latency * PA_USEC_PER_MSEC;
else
u->block_usec = BLOCK_USEC;
pa_sink_set_fixed_latency(u->sink, u->block_usec);
nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
pa_sink_set_max_rewind(u->sink, nbytes);
pa_sink_set_max_request(u->sink, nbytes);
@ -350,8 +359,6 @@ int pa__init(pa_module*m) {
goto fail;
}
pa_sink_set_fixed_latency(u->sink, u->block_usec);
pa_sink_put(u->sink);
pa_modargs_free(ma);