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54 lines
1.6 KiB
C++
54 lines
1.6 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 "mozilla/dom/AudioChannelBinding.h"
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namespace mozilla {
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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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// Returns the maximum number of channels supported by the audio hardware.
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uint32_t MaxNumberOfChannels();
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// Queries the samplerate the hardware/mixer runs at, and stores it.
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// Can be called on any thread. When this returns, it is safe to call
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// PreferredSampleRate.
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void InitPreferredSampleRate();
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// Get the aforementioned sample rate. Thread safe.
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uint32_t PreferredSampleRate();
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void PrefChanged(const char* aPref, void* aClosure);
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double GetVolumeScale();
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bool GetFirstStream();
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cubeb* GetCubebContext();
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cubeb* GetCubebContextUnlocked();
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void ReportCubebStreamInitFailure(bool aIsFirstStream);
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void ReportCubebBackendUsed();
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uint32_t GetCubebLatency();
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bool CubebLatencyPrefSet();
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#if defined(__ANDROID__) && defined(MOZ_B2G)
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cubeb_stream_type ConvertChannelToCubebType(dom::AudioChannel aChannel);
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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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