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stream: Support extended API with PULSE_LATENCY_MSEC if possible

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This only works in the single-format case (i.e. we know the format
up-front and we're not negotiating).
This commit is contained in:
Arun Raghavan 2015-06-11 11:01:30 +05:30
parent a1c4a6916f
commit 5adb126259
1 changed files with 9 additions and 1 deletions
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10
src/pulse/stream.c
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@ -987,6 +987,14 @@ static void patch_buffer_attr(pa_stream *s, pa_buffer_attr *attr, pa_stream_flag
if ((e = getenv("PULSE_LATENCY_MSEC"))) {
uint32_t ms;
pa_sample_spec ss;
pa_sample_spec_init(&ss);
if (pa_sample_spec_valid(&s->sample_spec))
ss = s->sample_spec;
else if (s->n_formats == 1)
pa_format_info_to_sample_spec(s->req_formats[0], &ss, NULL);
if (pa_atou(e, &ms) < 0 || ms <= 0)
pa_log_debug("Failed to parse $PULSE_LATENCY_MSEC: %s", e);
@ -994,7 +1002,7 @@ static void patch_buffer_attr(pa_stream *s, pa_buffer_attr *attr, pa_stream_flag
pa_log_debug("Ignoring $PULSE_LATENCY_MSEC: %s (invalid sample spec)", e);
else {
attr->maxlength = (uint32_t) -1;
attr->tlength = pa_usec_to_bytes(ms * PA_USEC_PER_MSEC, &s->sample_spec);
attr->tlength = pa_usec_to_bytes(ms * PA_USEC_PER_MSEC, &ss);
attr->minreq = (uint32_t) -1;
attr->prebuf = (uint32_t) -1;
attr->fragsize = attr->tlength;