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Bug 765524 - Register PrefChanged for CUBEB_LATENCY_MS. r=cpearce

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This commit is contained in:
Matthew Gregan 2012-06-17 14:13:22 +12:00
parent cdacbf5b96
commit 3d22845c94
1 changed files with 9 additions and 10 deletions
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19
content/media/nsAudioStream.cpp
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@ -23,7 +23,6 @@ using namespace mozilla::dom;
extern "C" {
#include "sydneyaudio/sydney_audio.h"
}
#include "mozilla/TimeStamp.h"
#include "nsThreadUtils.h"
#include "mozilla/Preferences.h"
@ -44,8 +43,6 @@ using namespace mozilla;
#define REMOTE_AUDIO 1
#endif
using mozilla::TimeStamp;
#ifdef PR_LOGGING
PRLogModuleInfo* gAudioStreamLog = nsnull;
#endif
@ -285,12 +282,9 @@ class AudioShutdownEvent : public nsRunnable
#define PREF_CUBEB_LATENCY "media.cubeb_latency_ms"
static mozilla::Mutex* gAudioPrefsLock = nsnull;
static double gVolumeScale = 1.0;
static bool gUseCubeb = false;
// Arbitrary default stream latency. The higher this value, the longer stream
// volume changes will take to become audible.
static PRUint32 gCubebLatency = 100;
static double gVolumeScale;
static bool gUseCubeb;
static PRUint32 gCubebLatency;
static int PrefChanged(const char* aPref, void* aClosure)
{
@ -308,7 +302,10 @@ static int PrefChanged(const char* aPref, void* aClosure)
mozilla::MutexAutoLock lock(*gAudioPrefsLock);
gUseCubeb = value;
} else if (strcmp(aPref, PREF_CUBEB_LATENCY) == 0) {
PRUint32 value = Preferences::GetUint(aPref);
// Arbitrary default stream latency of 100ms. The higher this
// value, the longer stream volume changes will take to become
// audible.
PRUint32 value = Preferences::GetUint(aPref, 100);
mozilla::MutexAutoLock lock(*gAudioPrefsLock);
gCubebLatency = NS_MIN<PRUint32>(NS_MAX<PRUint32>(value, 20), 1000);
}
@ -359,6 +356,8 @@ void nsAudioStream::InitLibrary()
#if defined(MOZ_CUBEB)
PrefChanged(PREF_USE_CUBEB, nsnull);
Preferences::RegisterCallback(PrefChanged, PREF_USE_CUBEB);
PrefChanged(PREF_CUBEB_LATENCY, nsnull);
Preferences::RegisterCallback(PrefChanged, PREF_CUBEB_LATENCY);
#endif
}