зеркало из https://github.com/mozilla/gecko-dev.git
85 строки
2.8 KiB
C++
85 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if !defined(CubebUtils_h_)
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# define CubebUtils_h_
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# include "cubeb/cubeb.h"
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# include "nsString.h"
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# include "mozilla/RefPtr.h"
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class AudioDeviceInfo;
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MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(cubeb_stream_prefs)
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namespace mozilla {
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class AudioThreadRegistry;
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namespace CubebUtils {
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typedef cubeb_devid AudioDeviceID;
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// Initialize Audio Library. Some Audio backends require initializing the
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// library before using it.
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void InitLibrary();
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// Shutdown Audio Library. Some Audio backends require shutting down the
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// library after using it.
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void ShutdownLibrary();
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bool SandboxEnabled();
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// Returns the global instance of AudioThreadRegistry. Initialized and
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// destroying in Init/ShutdownLibrary(), and safe from all threads.
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AudioThreadRegistry* GetAudioThreadRegistry();
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// Returns the maximum number of channels supported by the audio hardware.
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uint32_t MaxNumberOfChannels();
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// Get the sample rate the hardware/mixer runs at. Thread safe.
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uint32_t PreferredSampleRate();
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enum Side { Input, Output };
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double GetVolumeScale();
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bool GetFirstStream();
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cubeb* GetCubebContext();
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void ReportCubebStreamInitFailure(bool aIsFirstStream);
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void ReportCubebBackendUsed();
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uint32_t GetCubebPlaybackLatencyInMilliseconds();
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uint32_t GetCubebMTGLatencyInFrames(cubeb_stream_params* params);
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bool CubebLatencyPrefSet();
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void GetCurrentBackend(nsAString& aBackend);
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cubeb_stream_prefs GetDefaultStreamPrefs(cubeb_device_type aType);
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char* GetForcedOutputDevice();
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// No-op on all platforms but Android, where it tells the device's AudioManager
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// to switch to "communication mode", which might change audio routing,
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// bluetooth communication type, etc.
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void SetInCommunication(bool aInCommunication);
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// Returns true if the output streams should be routed like a stream containing
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// voice data, and not generic audio. This can influence audio processing and
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// device selection.
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bool RouteOutputAsVoice();
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// Returns, in seconds, the roundtrip latency Gecko thinks there is between the
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// default input and output devices. This is for diagnosing purposes, the
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// latency figures are best used directly from the cubeb streams themselves, as
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// the devices being used matter. This is blocking.
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bool EstimatedRoundTripLatencyDefaultDevices(double* aMean, double* aStdDev);
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# ifdef MOZ_WIDGET_ANDROID
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uint32_t AndroidGetAudioOutputSampleRate();
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uint32_t AndroidGetAudioOutputFramesPerBuffer();
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# endif
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# ifdef ENABLE_SET_CUBEB_BACKEND
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void ForceSetCubebContext(cubeb* aCubebContext);
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# endif
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} // namespace CubebUtils
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} // namespace mozilla
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#endif // CubebUtils_h_
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