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Fix audio lag if the audio player takes a while to start

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This commit is contained in:
Cameron Gutman 2014-10-20 03:34:15 -04:00
parent f133f293b8
commit e56923a71d
1 changed files with 21 additions and 1 deletions
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22
Limelight/Connection.m
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@ -35,9 +35,12 @@ struct AUDIO_BUFFER_QUEUE_ENTRY {
char data[0];
};
#define MAX_QUEUE_ENTRIES 10
static short decodedPcmBuffer[512];
static NSLock *audioLock;
static struct AUDIO_BUFFER_QUEUE_ENTRY *audioBufferQueue;
static int audioBufferQueueLength;
static AudioComponentInstance audioUnit;
static VideoDecoderRenderer* renderer;
@ -127,6 +130,19 @@ void ArDecodeAndPlaySample(char* sampleData, int sampleLength)
memcpy(newEntry->data, decodedPcmBuffer, decodedLength);
[audioLock lock];
if (audioBufferQueueLength > MAX_QUEUE_ENTRIES) {
NSLog(@"Audio player too slow. Dropping all decoded samples!");
// Clear all values from the buffer queue
struct AUDIO_BUFFER_QUEUE_ENTRY *entry;
while (audioBufferQueue != NULL) {
entry = audioBufferQueue;
audioBufferQueue = entry->next;
audioBufferQueueLength--;
free(entry);
}
}
if (audioBufferQueue == NULL) {
audioBufferQueue = newEntry;
}
@ -137,6 +153,8 @@ void ArDecodeAndPlaySample(char* sampleData, int sampleLength)
}
lastEntry->next = newEntry;
}
audioBufferQueueLength++;
[audioLock unlock];
}
}
@ -185,7 +203,7 @@ void ClDisplayTransientMessage(char* message)
streamConfig.width = width;
streamConfig.height = height;
streamConfig.fps = 30;
streamConfig.fps = 60;
streamConfig.bitrate = 5000;
streamConfig.packetSize = 1024;
// FIXME: RI AES members
@ -310,6 +328,7 @@ static OSStatus playbackCallback(void *inRefCon,
// Dequeue this entry temporarily
audioEntry = audioBufferQueue;
audioBufferQueue = audioBufferQueue->next;
audioBufferQueueLength--;
}
[audioLock unlock];
}
@ -330,6 +349,7 @@ static OSStatus playbackCallback(void *inRefCon,
[audioLock lock];
audioEntry->next = audioBufferQueue;
audioBufferQueue = audioEntry;
audioBufferQueueLength++;
[audioLock unlock];
}
else {