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[Audio Output] Synchronize access, report latency 

Report resampler latency properly, and synchronize access to the
resampler objects.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
swiftingly
Christopher Snowhill 2022-06-24 03:45:16 -07:00
parent 26a63e85b7
commit 438b142558
1 changed files with 28 additions and 5 deletions
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33
Audio/Output/OutputAVFoundation.m
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@ -93,19 +93,19 @@ static OSStatus eqRenderCallback(void *inRefCon, AudioUnitRenderActionFlags *ioA
formatClipped = YES;
}
if(!streamFormatStarted || config != streamChannelConfig || memcmp(&newFormat, &format, sizeof(format)) != 0) {
[currentPtsLock lock];
if(formatClipped) {
ALog(@"Sample rate clipped to no more than %f Hz!", maxSampleRate);
if(r8bstate) {
r8bold = r8bstate;
r8bstate = NULL;
r8bFlushing = YES;
}
r8bstate = r8bstate_new(format.mChannelsPerFrame, 1024, srcRate, dstRate);
} else if(r8bstate) {
r8bold = r8bstate;
r8bstate = NULL;
r8bFlushing = YES;
}
[currentPtsLock unlock];
newFormat = format;
streamChannelConfig = config;
streamFormatStarted = YES;
@ -135,7 +135,9 @@ static OSStatus eqRenderCallback(void *inRefCon, AudioUnitRenderActionFlags *ioA
const float *outputPtr = (const float *)[samples bytes];
if(r8bstate) {
size_t inDone = 0;
[currentPtsLock lock];
size_t framesDone = r8bstate_resample(r8bstate, outputPtr, frameCount, &inDone, &outputBuffer[0], 2048);
[currentPtsLock unlock];
if(!framesDone) return 0;
frameCount = (int)framesDone;
outputPtr = &outputBuffer[0];
@ -246,6 +248,8 @@ static OSStatus eqRenderCallback(void *inRefCon, AudioUnitRenderActionFlags *ioA
secondsHdcdSustained = 0;
currentPtsLock = [[NSLock alloc] init];
#ifdef OUTPUT_LOG
_logFile = fopen("/tmp/CogAudioLog.raw", "wb");
#endif
@ -696,7 +700,9 @@ current_device_listener(AudioObjectID inObjectID, UInt32 inNumberAddresses, cons
++i;
continue;
}
[currentPtsLock lock];
samplesRendered = r8bstate_flush(r8bold, &tempBuffer[0], 2048);
[currentPtsLock unlock];
if(!samplesRendered) {
r8bstate_delete(r8bold);
r8bold = NULL;
@ -915,14 +921,16 @@ current_device_listener(AudioObjectID inObjectID, UInt32 inNumberAddresses, cons
}
- (void)synchronizerBlock {
__block NSLock *lock = [[NSLock alloc] init];
currentPtsLock = lock;
NSLock *lock = currentPtsLock;
CMTime interval = CMTimeMakeWithSeconds(1.0 / 60.0, 1000000000);
CMTime *lastPts = &self->lastPts;
CMTime *outputPts = &self->outputPts;
OutputNode *outputController = self->outputController;
double *latencySecondsOut = &self->secondsLatency;
VisualizationController *visController = self->visController;
void **r8bstate = &self->r8bstate;
void **r8bold = &self->r8bold;
void **r8bvis = &self->r8bvis;
currentPtsObserver = [renderSynchronizer addPeriodicTimeObserverForInterval:interval
queue:NULL
usingBlock:^(CMTime time) {
@ -938,10 +946,25 @@ current_device_listener(AudioObjectID inObjectID, UInt32 inNumberAddresses, cons
CMTime latencyTime = CMTimeSubtract(*outputPts, time);
double latencySeconds = CMTimeGetSeconds(latencyTime);
double latencyVis = 0.0;
[lock lock];
if(*r8bstate) {
latencySeconds += r8bstate_latency(*r8bstate);
}
if(*r8bold) {
latencySeconds += r8bstate_latency(*r8bold);
}
if(*r8bvis) {
latencyVis = r8bstate_latency(*r8bvis);
}
[lock unlock];
if(latencySeconds < 0)
latencySeconds = 0;
latencyVis = latencySeconds - latencyVis;
if(latencyVis < 0)
latencyVis = 0;
*latencySecondsOut = latencySeconds;
[visController postLatency:latencySeconds];
[visController postLatency:latencyVis];
}];
}