mirror of
https://github.com/morgan9e/VolumeControl
synced 2026-04-14 00:04:05 +09:00
113 lines
4.6 KiB
C++
113 lines
4.6 KiB
C++
// This file is part of Background Music.
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//
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// Background Music is free software: you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation, either version 2 of the
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// License, or (at your option) any later version.
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//
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// Background Music is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Background Music. If not, see <http://www.gnu.org/licenses/>.
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// VC_Stream.h
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// VCDriver
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//
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// Copyright © 2017 Kyle Neideck
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//
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// An input or output audio stream. Each stream belongs to a device (see VC_AbstractDevice), which
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// in turn belongs to a plug-in (see VC_PlugIn).
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//
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// This class only handles the stream's HAL properties, i.e. the metadata about the stream, not the
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// audio data itself.
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//
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#ifndef VCDriver__VC_Stream
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#define VCDriver__VC_Stream
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// SuperClass Includes
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#include "VC_Object.h"
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// PublicUtility Includes
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#include "CAMutex.h"
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// System Includes
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#include <CoreAudio/AudioHardwareBase.h>
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#pragma clang assume_nonnull begin
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class VC_Stream
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:
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public VC_Object
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{
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#pragma mark Construction/Destruction
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public:
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VC_Stream(AudioObjectID inObjectID,
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AudioObjectID inOwnerDeviceID,
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bool inIsInput,
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Float64 inSampleRate,
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UInt32 inStartingChannel = 1);
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virtual ~VC_Stream();
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#pragma mark Property Operations
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public:
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bool HasProperty(AudioObjectID inObjectID,
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pid_t inClientPID,
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const AudioObjectPropertyAddress& inAddress) const;
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bool IsPropertySettable(AudioObjectID inObjectID,
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pid_t inClientPID,
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const AudioObjectPropertyAddress& inAddress) const;
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UInt32 GetPropertyDataSize(AudioObjectID inObjectID,
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pid_t inClientPID,
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const AudioObjectPropertyAddress& inAddress,
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UInt32 inQualifierDataSize,
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const void* __nullable inQualifierData) const;
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void GetPropertyData(AudioObjectID inObjectID,
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pid_t inClientPID,
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const AudioObjectPropertyAddress& inAddress,
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UInt32 inQualifierDataSize,
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const void* __nullable inQualifierData,
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UInt32 inDataSize,
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UInt32& outDataSize,
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void* outData) const;
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void SetPropertyData(AudioObjectID inObjectID,
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pid_t inClientPID,
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const AudioObjectPropertyAddress& inAddress,
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UInt32 inQualifierDataSize,
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const void* __nullable inQualifierData,
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UInt32 inDataSize,
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const void* inData);
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#pragma mark Accessors
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void SetSampleRate(Float64 inSampleRate);
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private:
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CAMutex mStateMutex;
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bool mIsInput;
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Float64 mSampleRate;
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/*! True if the stream is enabled and doing IO. See kAudioStreamPropertyIsActive. */
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bool mIsStreamActive;
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/*!
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The absolute channel number for the first channel in the stream. For example, if a device has
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two output streams with two channels each, then the starting channel number for the first
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stream is 1 and the starting channel number for the second stream is 3. See
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kAudioStreamPropertyStartingChannel.
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*/
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UInt32 mStartingChannel;
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};
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#pragma clang assume_nonnull end
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#endif /* VCDriver__VC_Stream */
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