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a minor performance improvement

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3759 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper
2003-06-30 11:05:45 +00:00
parent fcfad7f823
commit 15dca7402c
1 changed files with 11 additions and 12 deletions
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src/add-ons/media/media-add-ons/mixer/MixerCore.cpp
+11 -12
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@@ -212,6 +212,7 @@ MixerCore::ApplyOutputFormat()
fMixBufferFrameCount *= 2;
}
fMixBufferChannelCount = format.channel_count;
ASSERT(fMixBufferChannelCount == fOutput->GetOutputChannelCount());
fMixBufferChannelTypes = new int32 [format.channel_count];
for (int i = 0; i < fMixBufferChannelCount; i++)
@@ -453,17 +454,16 @@ MixerCore::MixThread()
}
}
int count = fOutput->GetOutputChannelCount();
for (int chan = 0; chan < count; chan++) {
int count2 = fOutput->GetOutputChannelSourceCount(chan);
for (int i = 0; i < count2; i++) {
for (int chan = 0; chan < fMixBufferChannelCount; chan++) {
int sourcecount = fOutput->GetOutputChannelSourceCount(chan);
for (int i = 0; i < sourcecount; i++) {
int type;
float gain;
fOutput->GetMixerChannelInfo(chan, i, &type, &gain);
if (type < 0 || type >= MAX_TYPES)
continue;
int count3 = InputChanInfos[type].CountItems();
for (int j = 0; j < count3; j++) {
int count = InputChanInfos[type].CountItems();
for (int j = 0; j < count; j++) {
chan_info *info = InputChanInfos[type].ItemAt(j);
chan_info *newinfo = MixChanInfos[chan].Create();
newinfo->base = info->base;
@@ -475,12 +475,11 @@ MixerCore::MixThread()
uint32 dst_sample_offset = fMixBufferChannelCount * sizeof(float);
count = fOutput->GetOutputChannelCount();
for (int chan = 0; chan < count; chan++) {
memset(fMixBuffer, 0, fMixBufferChannelCount * fMixBufferFrameCount * sizeof(float));
for (int chan = 0; chan < fMixBufferChannelCount; chan++) {
PRINT(5, "MixThread: chan %d has %d sources\n", chan, MixChanInfos[chan].CountItems());
ZeroFill(&fMixBuffer[chan], dst_sample_offset, fMixBufferFrameCount);
int count2 = MixChanInfos[chan].CountItems();
for (int i = 0; i < count2; i++) {
int count = MixChanInfos[chan].CountItems();
for (int i = 0; i < count; i++) {
chan_info *info = MixChanInfos[chan].ItemAt(i);
char *dst = (char *)&fMixBuffer[chan];
PRINT(5, "MixThread: base %p, sample-offset %2d, gain %.3f\n", info->base, info->sample_offset, info->gain);
@@ -507,7 +506,7 @@ MixerCore::MixThread()
frames_per_buffer(fOutput->MediaOutput().format.u.raw_audio),
1.0);
}
PRINT(4, "send buffer, inframes %ld, outframes %ld\n",fMixBufferFrameCount, frames_per_buffer(fOutput->MediaOutput().format.u.raw_audio));
PRINT(4, "send buffer, inframes %ld, outframes %ld\n", fMixBufferFrameCount, frames_per_buffer(fOutput->MediaOutput().format.u.raw_audio));
// swap byte order if necessary