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limit maximum latency

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3796 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper
2003-07-01 20:58:34 +00:00
parent 6c8c941ac3
commit c378a5ecf8
2 changed files with 4 additions and 4 deletions
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src/add-ons/media/media-add-ons/mixer/AudioMixer.cpp
+2 -3
View File
@@ -444,7 +444,7 @@ AudioMixer::FormatChangeRequested(const media_source &source, const media_destin
TRACE("AudioMixer: buffer duration is %Ld usecs\n", BufferDuration()); TRACE("AudioMixer: buffer duration is %Ld usecs\n", BufferDuration());
// Our internal latency is at least the length of a full output buffer // Our internal latency is at least the length of a full output buffer
fInternalLatency = bigtime_t(1.6 * BufferDuration()); fInternalLatency = BufferDuration() + min(4500LL, bigtime_t(0.5 * BufferDuration()));
TRACE("AudioMixer: Internal latency is %Ld usecs\n", fInternalLatency); TRACE("AudioMixer: Internal latency is %Ld usecs\n", fInternalLatency);
SetEventLatency(fDownstreamLatency + fInternalLatency); SetEventLatency(fDownstreamLatency + fInternalLatency);
@@ -637,11 +637,10 @@ AudioMixer::Connect(status_t error, const media_source &source, const media_dest
// SetDuration of one buffer // SetDuration of one buffer
SetBufferDuration(buffer_duration(format.u.raw_audio)); SetBufferDuration(buffer_duration(format.u.raw_audio));
TRACE("AudioMixer: buffer duration is %Ld usecs\n", BufferDuration()); TRACE("AudioMixer: buffer duration is %Ld usecs\n", BufferDuration());
// Our internal latency is at least the length of a full output buffer // Our internal latency is at least the length of a full output buffer
fInternalLatency = bigtime_t(1.6 * BufferDuration()); fInternalLatency = BufferDuration() + min(4500LL, bigtime_t(0.5 * BufferDuration()));
TRACE("AudioMixer: Internal latency is %Ld usecs\n", fInternalLatency); TRACE("AudioMixer: Internal latency is %Ld usecs\n", fInternalLatency);
SetEventLatency(fDownstreamLatency + fInternalLatency); SetEventLatency(fDownstreamLatency + fInternalLatency);
src/add-ons/media/media-add-ons/mixer/MixerCore.cpp
+2 -1
View File
@@ -401,7 +401,8 @@ MixerCore::MixThread()
if (!LockFromMixThread()) if (!LockFromMixThread())
return; return;
latency = bigtime_t(0.4 * buffer_duration(fOutput->MediaOutput().format.u.raw_audio)); latency = min(3600LL, bigtime_t(0.4 * buffer_duration(fOutput->MediaOutput().format.u.raw_audio)));
// XXX we might need to add scheduling latency
TRACE("MixerCore: starting MixThread at %Ld with latency %Ld and downstream latency %Ld\n", start, latency, fDownstreamLatency); TRACE("MixerCore: starting MixThread at %Ld with latency %Ld and downstream latency %Ld\n", start, latency, fDownstreamLatency);