qqnxaudiodevice.cpp

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// Copyright (C) 2016 Research In Motion
// Copyright (C) 2021 The Qt Company
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qqnxaudiodevice_p.h"
 
#include "qqnxaudioutils_p.h"
 
#include <array>
 
#include <sys/asoundlib.h>
 
using namespace QnxAudioUtils;
 
QT_BEGIN_NAMESPACE
 
namespace {
 
QAudioDevicePrivate::AudioDeviceFormat
createQnxAudioDeviceFormatFromDeviceName(const QByteArray &deviceName, QAudioDevice::Mode mode)
{
    QAudioDevicePrivate::AudioDeviceFormat format;
 
    format.preferredFormat.setChannelCount(mode == QAudioDevice::Input ? 1 : 2);
 
    format.minimumChannelCount = 1;
    format.maximumChannelCount = 2;
 
    const std::optional<snd_pcm_channel_info_t> info = pcmChannelInfo(deviceName, mode);
 
    if (!info)
        return format;
 
    format.minimumSampleRate = info->min_rate;
    format.maximumSampleRate = info->max_rate;
 
    constexpr std::array sampleRates { 48000, 44100, 22050, 16000, 11025, 8000 };
 
    for (int rate : sampleRates) {
        if (rate <= format.maximumSampleRate && rate >= format.minimumSampleRate) {
            format.preferredFormat.setSampleRate(rate);
            break;
        }
    }
 
    if (info->formats & SND_PCM_FMT_U8) {
        format.supportedSampleFormats << QAudioFormat::UInt8;
        format.preferredFormat.setSampleFormat(QAudioFormat::UInt8);
    }
 
    if (info->formats & SND_PCM_FMT_S16) {
        format.supportedSampleFormats << QAudioFormat::Int16;
        format.preferredFormat.setSampleFormat(QAudioFormat::Int16);
    }
 
    if (info->formats & SND_PCM_FMT_S32)
        format.supportedSampleFormats << QAudioFormat::Int32;
 
    if (info->formats & SND_PCM_FMT_FLOAT)
        format.supportedSampleFormats << QAudioFormat::Float;
 
    return format;
}
 
} // namespace
 
QnxAudioDeviceInfo::QnxAudioDeviceInfo(const QByteArray &deviceName, QAudioDevice::Mode mode)
    : QAudioDevicePrivate(deviceName, mode, QString::fromUtf8(deviceName),
                          deviceName.contains("Preferred"),
                          createQnxAudioDeviceFormatFromDeviceName(deviceName, mode))
{
}
 
QnxAudioDeviceInfo::~QnxAudioDeviceInfo()
{
}
 
bool QnxAudioDeviceInfo::isFormatSupported(const QAudioFormat &format) const
{
    const HandleUniquePtr handle = openPcmDevice(id, mode);
 
    if (!handle)
        return false;
 
    const std::optional<snd_pcm_channel_info_t> info = pcmChannelInfo(handle.get(), mode);
 
    if (!info)
        return false;
 
    snd_pcm_channel_params_t params = formatToChannelParams(format, mode, info->max_fragment_size);
    const int errorCode = snd_pcm_plugin_params(handle.get(), &params);
 
    return errorCode == 0;
}
 
QT_END_NAMESPACE