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// Copyright (C) 2016 Research In Motion
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qqnxaudioutils_p.h"
QT_BEGIN_NAMESPACE
namespace QnxAudioUtils
{
snd_pcm_channel_params_t formatToChannelParams(const QAudioFormat &format, QAudioDevice::Mode mode, int fragmentSize)
{
snd_pcm_channel_params_t params;
memset(¶ms, 0, sizeof(params));
params.channel = (mode == QAudioDevice::Output) ? 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.sampleFormat()) {
case QAudioFormat::UInt8:
params.format.format = SND_PCM_SFMT_U8;
break;
default:
// fall through
case QAudioFormat::Int16:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
params.format.format = SND_PCM_SFMT_S16_LE;
#else
params.format.format = SND_PCM_SFMT_S16_BE;
#endif
break;
case QAudioFormat::Int32:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
params.format.format = SND_PCM_SFMT_S32_LE;
#else
params.format.format = SND_PCM_SFMT_S32_BE;
#endif
break;
case QAudioFormat::Float:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
params.format.format = SND_PCM_SFMT_FLOAT_LE;
#else
params.format.format = SND_PCM_SFMT_FLOAT_BE;
#endif
break;
}
return params;
}
HandleUniquePtr openPcmDevice(const QByteArray &id, QAudioDevice::Mode mode)
{
const int pcmMode = mode == QAudioDevice::Output
? SND_PCM_OPEN_PLAYBACK
: SND_PCM_OPEN_CAPTURE;
snd_pcm_t *handle;
const int errorCode = snd_pcm_open_name(&handle, id.constData(), pcmMode);
if (errorCode != 0) {
qWarning("Unable to open PCM device %s (0x%x)", id.constData(), -errorCode);
return {};
}
return HandleUniquePtr { handle };
}
template <typename T, typename Func>
std::optional<T> pcmChannelGetStruct(snd_pcm_t *handle, QAudioDevice::Mode mode, Func &&func)
{
// initialize in-place to prevent an extra copy when returning
std::optional<T> t = { T{} };
t->channel = mode == QAudioDevice::Output
? SND_PCM_CHANNEL_PLAYBACK
: SND_PCM_CHANNEL_CAPTURE;
const int errorCode = func(handle, &(*t));
if (errorCode != 0) {
qWarning("QAudioDevice: couldn't get channel info (0x%x)", -errorCode);
return {};
}
return t;
}
template <typename T, typename Func>
std::optional<T> pcmChannelGetStruct(const QByteArray &device,
QAudioDevice::Mode mode, Func &&func)
{
const HandleUniquePtr handle = openPcmDevice(device, mode);
if (!handle)
return {};
return pcmChannelGetStruct<T>(handle.get(), mode, std::forward<Func>(func));
}
std::optional<snd_pcm_channel_info_t> pcmChannelInfo(snd_pcm_t *handle, QAudioDevice::Mode mode)
{
return pcmChannelGetStruct<snd_pcm_channel_info_t>(handle, mode, snd_pcm_plugin_info);
}
std::optional<snd_pcm_channel_info_t> pcmChannelInfo(const QByteArray &device,
QAudioDevice::Mode mode)
{
return pcmChannelGetStruct<snd_pcm_channel_info_t>(device, mode, snd_pcm_plugin_info);
}
std::optional<snd_pcm_channel_setup_t> pcmChannelSetup(snd_pcm_t *handle, QAudioDevice::Mode mode)
{
return pcmChannelGetStruct<snd_pcm_channel_setup_t>(handle, mode, snd_pcm_plugin_setup);
}
std::optional<snd_pcm_channel_setup_t> pcmChannelSetup(const QByteArray &device,
QAudioDevice::Mode mode)
{
return pcmChannelGetStruct<snd_pcm_channel_setup_t>(device, mode, snd_pcm_plugin_setup);
}
std::optional<snd_pcm_channel_status_t> pcmChannelStatus(snd_pcm_t *handle, QAudioDevice::Mode mode)
{
return pcmChannelGetStruct<snd_pcm_channel_status_t>(handle, mode, snd_pcm_plugin_status);
}
std::optional<snd_pcm_channel_status_t> pcmChannelStatus(const QByteArray &device,
QAudioDevice::Mode mode)
{
return pcmChannelGetStruct<snd_pcm_channel_status_t>(device, mode, snd_pcm_plugin_status);
}
} // namespace QnxAudioUtils
QT_END_NAMESPACE
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