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rdpsnd/pulse: add latency control.

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This commit is contained in:
Vic Lee 2011-09-25 14:00:09 +08:00
parent c82dfa2a0b
commit 7891ce2c75
1 changed files with 13 additions and 1 deletions
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14
channels/rdpsnd/pulse/rdpsnd_pulse.c
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@ -225,6 +225,8 @@ static void rdpsnd_pulse_open(rdpsndDevicePlugin* device, rdpsndFormat* format,
{
rdpsndPulsePlugin* pulse = (rdpsndPulsePlugin*)device;
pa_stream_state_t state;
pa_stream_flags_t flags;
pa_buffer_attr buffer_attr = { 0 };
char ss[PA_SAMPLE_SPEC_SNPRINT_MAX];
if (!pulse->context || pulse->stream)
@ -260,8 +262,18 @@ static void rdpsnd_pulse_open(rdpsndDevicePlugin* device, rdpsndFormat* format,
pa_stream_set_write_callback(pulse->stream,
rdpsnd_pulse_stream_request_callback, pulse);
flags = PA_STREAM_INTERPOLATE_TIMING | PA_STREAM_AUTO_TIMING_UPDATE;
if (pulse->latency > 0)
{
buffer_attr.maxlength = pa_usec_to_bytes(pulse->latency * 2 * 1000, &pulse->sample_spec);
buffer_attr.tlength = pa_usec_to_bytes(pulse->latency * 1000, &pulse->sample_spec);
buffer_attr.prebuf = (uint32_t) -1;
buffer_attr.minreq = (uint32_t) -1;
buffer_attr.fragsize = (uint32_t) -1;
flags |= PA_STREAM_ADJUST_LATENCY;
}
if (pa_stream_connect_playback(pulse->stream,
pulse->device_name, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL) < 0)
pulse->device_name, pulse->latency > 0 ? &buffer_attr : NULL, flags, NULL, NULL) < 0)
{
pa_threaded_mainloop_unlock(pulse->mainloop);
DEBUG_WARN("pa_stream_connect_playback failed (%d)",