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
 
QnxAudioDeviceInfo::QnxAudioDeviceInfo(const QByteArray &deviceName, QAudioDevice::Mode mode)
    : QAudioDevicePrivate(deviceName, mode)
{
    isDefault = id.contains("Preferred");
 
    preferredFormat.setChannelCount(mode == QAudioDevice::Input ? 1 : 2);
 
    description = QString::fromUtf8(id);
 
    minimumChannelCount = 1;
    maximumChannelCount = 2;
 
    const std::optional<snd_pcm_channel_info_t> info = pcmChannelInfo(id, mode);
 
    if (!info)
        return;
 
    minimumSampleRate = info->min_rate;
    maximumSampleRate = info->max_rate;
 
    constexpr std::array sampleRates { 48000, 44100, 22050, 16000, 11025, 8000 };
 
    for (int rate : sampleRates) {
        if (rate <= maximumSampleRate && rate >= minimumSampleRate) {
            preferredFormat.setSampleRate(rate);
            break;
        }
    }
 
    if (info->formats & SND_PCM_FMT_U8) {
        supportedSampleFormats << QAudioFormat::UInt8;
        preferredFormat.setSampleFormat(QAudioFormat::UInt8);
    }
 
    if (info->formats & SND_PCM_FMT_S16) {
        supportedSampleFormats << QAudioFormat::Int16;
        preferredFormat.setSampleFormat(QAudioFormat::Int16);
    }
 
    if (info->formats & SND_PCM_FMT_S32)
        supportedSampleFormats << QAudioFormat::Int32;
 
    if (info->formats & SND_PCM_FMT_FLOAT)
        supportedSampleFormats << QAudioFormat::Float;
}
 
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