audiodevice.cpp

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/*
 *  Copyright (C) 2004-2025 Savoir-faire Linux Inc.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
 
#include "audiodevice.h"
 
#if !TARGET_OS_IPHONE
 
namespace jami {
 
AudioDevice::AudioDevice(AudioDeviceID devid, bool isInput)
{
    init(devid, isInput);
}
 
void
AudioDevice::init(AudioDeviceID devid, bool isInput)
{
    id_ = devid;
    isInput_ = isInput;
    if (id_ == kAudioDeviceUnknown)
        return;
 
    name_ = getName();
    channels_ = countChannels();
 
    UInt32 propsize = sizeof(Float32);
 
    AudioObjectPropertyScope theScope = isInput_ ? kAudioDevicePropertyScopeInput
                                                 : kAudioDevicePropertyScopeOutput;
 
    AudioObjectPropertyAddress theAddress = {kAudioDevicePropertySafetyOffset,
                                             theScope,
                                             0}; // channel
 
    __Verify_noErr(AudioObjectGetPropertyData(id_, &theAddress, 0, NULL, &propsize, &safetyOffset_));
 
    propsize = sizeof(UInt32);
    theAddress.mSelector = kAudioDevicePropertyBufferFrameSize;
 
    __Verify_noErr(
        AudioObjectGetPropertyData(id_, &theAddress, 0, NULL, &propsize, &bufferSizeFrames_));
 
    propsize = sizeof(AudioStreamBasicDescription);
    theAddress.mSelector = kAudioDevicePropertyStreamFormat;
 
    __Verify_noErr(AudioObjectGetPropertyData(id_, &theAddress, 0, NULL, &propsize, &format_));
}
 
bool
AudioDevice::valid() const
{
    return id_ != kAudioDeviceUnknown;
}
 
void
AudioDevice::setBufferSize(UInt32 size)
{
    UInt32 propsize = sizeof(UInt32);
 
    AudioObjectPropertyScope theScope = isInput_ ? kAudioDevicePropertyScopeInput
                                                 : kAudioDevicePropertyScopeOutput;
 
    AudioObjectPropertyAddress theAddress = {kAudioDevicePropertyBufferFrameSize,
                                             theScope,
                                             0}; // channel
 
    __Verify_noErr(AudioObjectSetPropertyData(id_, &theAddress, 0, NULL, propsize, &size));
 
    __Verify_noErr(
        AudioObjectGetPropertyData(id_, &theAddress, 0, NULL, &propsize, &bufferSizeFrames_));
}
 
int
AudioDevice::countChannels() const
{
    OSStatus err;
    UInt32 propSize;
    int result = 0;
 
    AudioObjectPropertyScope theScope = isInput_ ? kAudioDevicePropertyScopeInput
                                                 : kAudioDevicePropertyScopeOutput;
 
    AudioObjectPropertyAddress theAddress = {kAudioDevicePropertyStreamConfiguration,
                                             theScope,
                                             0}; // channel
 
    err = AudioObjectGetPropertyDataSize(id_, &theAddress, 0, NULL, &propSize);
    if (err)
        return 0;
 
    AudioBufferList* buflist = (AudioBufferList*) malloc(propSize);
    err = AudioObjectGetPropertyData(id_, &theAddress, 0, NULL, &propSize, buflist);
    if (!err) {
        for (UInt32 i = 0; i < buflist->mNumberBuffers; ++i) {
            result += buflist->mBuffers[i].mNumberChannels;
        }
    }
    free(buflist);
    return result;
}
 
std::string
AudioDevice::getName() const
{
    char buf[256];
    UInt32 maxlen = sizeof(buf) - 1;
 
    AudioObjectPropertyScope theScope = isInput_ ? kAudioDevicePropertyScopeInput
                                                 : kAudioDevicePropertyScopeOutput;
 
    AudioObjectPropertyAddress theAddress = {kAudioDevicePropertyDeviceName, theScope, 0}; // channel
 
    __Verify_noErr(AudioObjectGetPropertyData(id_, &theAddress, 0, NULL, &maxlen, buf));
    return buf;
}
 
} // namespace jami
 
#endif // TARGET_OS_IPHONE