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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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dom/media/CubebUtils.h Normal file
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#if !defined(CubebUtils_h_)
#define CubebUtils_h_
#include "cubeb/cubeb.h"
#include "mozilla/dom/AudioChannelBinding.h"
#include "mozilla/Maybe.h"
namespace mozilla {
namespace CubebUtils {
typedef cubeb_devid AudioDeviceID;
// Initialize Audio Library. Some Audio backends require initializing the
// library before using it.
void InitLibrary();
// Shutdown Audio Library. Some Audio backends require shutting down the
// library after using it.
void ShutdownLibrary();
// Returns the maximum number of channels supported by the audio hardware.
uint32_t MaxNumberOfChannels();
// Get the sample rate the hardware/mixer runs at. Thread safe.
uint32_t PreferredSampleRate();
void PrefChanged(const char* aPref, void* aClosure);
double GetVolumeScale();
bool GetFirstStream();
cubeb* GetCubebContext();
cubeb* GetCubebContextUnlocked();
void ReportCubebStreamInitFailure(bool aIsFirstStream);
void ReportCubebBackendUsed();
uint32_t GetCubebPlaybackLatencyInMilliseconds();
Maybe<uint32_t> GetCubebMSGLatencyInFrames();
bool CubebLatencyPrefSet();
#if defined(__ANDROID__) && defined(MOZ_B2G)
cubeb_stream_type ConvertChannelToCubebType(dom::AudioChannel aChannel);
#endif
void GetCurrentBackend(nsAString& aBackend);
} // namespace CubebUtils
} // namespace mozilla
#endif // CubebUtils_h_