qt-everywhere-src-5.15.1/qtmultimedia/src/plugins/qnx-audio/audio/qnxaudioutils.cpp

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#include "qnxaudioutils.h"

QT_BEGIN_NAMESPACE

snd_pcm_channel_params_t QnxAudioUtils::formatToChannelParams(const QAudioFormat &format, QAudio::Mode mode, int fragmentSize)
{
    snd_pcm_channel_params_t params;
    memset(&params, 0, sizeof(params));
    params.channel = (mode == QAudio::AudioOutput) ? SND_PCM_CHANNEL_PLAYBACK : SND_PCM_CHANNEL_CAPTURE;
    params.mode = SND_PCM_MODE_BLOCK;
    params.start_mode = SND_PCM_START_DATA;
    params.stop_mode = SND_PCM_STOP_ROLLOVER;
    params.buf.block.frag_size = fragmentSize;
    params.buf.block.frags_min = 1;
    params.buf.block.frags_max = 1;
    strcpy(params.sw_mixer_subchn_name, "QAudio Channel");

    params.format.interleave = 1;
    params.format.rate = format.sampleRate();
    params.format.voices = format.channelCount();

    switch (format.sampleSize()) {
    case 8:
        switch (format.sampleType()) {
        case QAudioFormat::SignedInt:
            params.format.format = SND_PCM_SFMT_S8;
            break;
        case QAudioFormat::UnSignedInt:
            params.format.format = SND_PCM_SFMT_U8;
            break;
        default:
            break;
        }
        break;

    case 16:
        switch (format.sampleType()) {
        case QAudioFormat::SignedInt:
            if (format.byteOrder() == QAudioFormat::LittleEndian) {
                params.format.format = SND_PCM_SFMT_S16_LE;
            } else {
                params.format.format = SND_PCM_SFMT_S16_BE;
            }
            break;
        case QAudioFormat::UnSignedInt:
            if (format.byteOrder() == QAudioFormat::LittleEndian) {
                params.format.format = SND_PCM_SFMT_U16_LE;
            } else {
                params.format.format = SND_PCM_SFMT_U16_BE;
            }
            break;
        default:
            break;
        }
        break;

    case 32:
        switch (format.sampleType()) {
        case QAudioFormat::SignedInt:
            if (format.byteOrder() == QAudioFormat::LittleEndian) {
                params.format.format = SND_PCM_SFMT_S32_LE;
            } else {
                params.format.format = SND_PCM_SFMT_S32_BE;
            }
            break;
        case QAudioFormat::UnSignedInt:
            if (format.byteOrder() == QAudioFormat::LittleEndian) {
                params.format.format = SND_PCM_SFMT_U32_LE;
            } else {
                params.format.format = SND_PCM_SFMT_U32_BE;
            }
            break;
        case QAudioFormat::Float:
            if (format.byteOrder() == QAudioFormat::LittleEndian) {
                params.format.format = SND_PCM_SFMT_FLOAT_LE;
            } else {
                params.format.format = SND_PCM_SFMT_FLOAT_BE;
            }
            break;
        default:
            break;
        }
        break;
    }

    return params;
}

QT_END_NAMESPACE