slapin/qtmultimedia
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
Files
4fd2b2f6849cda72cdcc06aa0907bc565875f6dd
qtmultimedia/src/plugins/alsa/qalsaaudiodeviceinfo.cpp
Raphael Kubo da Costa 3b322323d0 alsa: Relax ALSA version checks for 1.1.x to be detected. 
Relax the check for SND_LIB_MINOR and SND_LIB_SUBMINOR so that ALSA
1.1.x is not considered older than 1.0.10. QtMultimedia builds fine with
ALSA 1.1.

Change-Id: If697c34cc7d9bbe2f2a3413d0c25ac4de4e93b34
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>
2015-11-27 22:41:13 +00:00

452 lines
13 KiB
C++
Raw Blame History

/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// INTERNAL USE ONLY: Do NOT use for any other purpose.
//
#include "qalsaaudiodeviceinfo.h"
#include <alsa/version.h>
QT_BEGIN_NAMESPACE
QAlsaAudioDeviceInfo::QAlsaAudioDeviceInfo(QByteArray dev, QAudio::Mode mode)
{
handle = 0;
device = QLatin1String(dev);
this->mode = mode;
checkSurround();
}
QAlsaAudioDeviceInfo::~QAlsaAudioDeviceInfo()
{
close();
}
bool QAlsaAudioDeviceInfo::isFormatSupported(const QAudioFormat& format) const
{
return testSettings(format);
}
QAudioFormat QAlsaAudioDeviceInfo::preferredFormat() const
{
QAudioFormat nearest;
if(mode == QAudio::AudioOutput) {
nearest.setSampleRate(44100);
nearest.setChannelCount(2);
nearest.setByteOrder(QAudioFormat::LittleEndian);
nearest.setSampleType(QAudioFormat::SignedInt);
nearest.setSampleSize(16);
nearest.setCodec(QLatin1String("audio/pcm"));
} else {
nearest.setSampleRate(8000);
nearest.setChannelCount(1);
nearest.setSampleType(QAudioFormat::UnSignedInt);
nearest.setSampleSize(8);
nearest.setCodec(QLatin1String("audio/pcm"));
if(!testSettings(nearest)) {
nearest.setChannelCount(2);
nearest.setSampleSize(16);
nearest.setSampleType(QAudioFormat::SignedInt);
}
}
return nearest;
}
QString QAlsaAudioDeviceInfo::deviceName() const
{
return device;
}
QStringList QAlsaAudioDeviceInfo::supportedCodecs()
{
updateLists();
return codecz;
}
QList<int> QAlsaAudioDeviceInfo::supportedSampleRates()
{
updateLists();
return sampleRatez;
}
QList<int> QAlsaAudioDeviceInfo::supportedChannelCounts()
{
updateLists();
return channelz;
}
QList<int> QAlsaAudioDeviceInfo::supportedSampleSizes()
{
updateLists();
return sizez;
}
QList<QAudioFormat::Endian> QAlsaAudioDeviceInfo::supportedByteOrders()
{
updateLists();
return byteOrderz;
}
QList<QAudioFormat::SampleType> QAlsaAudioDeviceInfo::supportedSampleTypes()
{
updateLists();
return typez;
}
bool QAlsaAudioDeviceInfo::open()
{
int err = 0;
QString dev = device;
QList<QByteArray> devices = availableDevices(mode);
if(dev.compare(QLatin1String("default")) == 0) {
#if (SND_LIB_MAJOR == 1 && (SND_LIB_MINOR > 0 || SND_LIB_SUBMINOR >= 14))
if (devices.size() > 0)
dev = QLatin1String(devices.first().constData());
else
return false;
#else
dev = QLatin1String("hw:0,0");
#endif
} else {
#if (SND_LIB_MAJOR == 1 && (SND_LIB_MINOR > 0 || SND_LIB_SUBMINOR >= 14))
dev = device;
#else
int idx = 0;
char *name;
QString shortName = device.mid(device.indexOf(QLatin1String("="),0)+1);
while (snd_card_get_name(idx,&name) == 0) {
if(dev.contains(QLatin1String(name)))
break;
idx++;
}
dev = QString(QLatin1String("hw:%1,0")).arg(idx);
#endif
}
if(mode == QAudio::AudioOutput) {
err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
} else {
err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_CAPTURE,0);
}
if(err < 0) {
handle = 0;
return false;
}
return true;
}
void QAlsaAudioDeviceInfo::close()
{
if(handle)
snd_pcm_close(handle);
handle = 0;
}
bool QAlsaAudioDeviceInfo::testSettings(const QAudioFormat& format) const
{
// Set nearest to closest settings that do work.
// See if what is in settings will work (return value).
int err = -1;
snd_pcm_t* pcmHandle;
snd_pcm_hw_params_t *params;
QString dev;
#if (SND_LIB_MAJOR == 1 && (SND_LIB_MINOR > 0 || SND_LIB_SUBMINOR >= 14))
dev = device;
if (dev.compare(QLatin1String("default")) == 0) {
QList<QByteArray> devices = availableDevices(QAudio::AudioOutput);
if (!devices.isEmpty())
dev = QLatin1String(devices.first().constData());
}
#else
if (dev.compare(QLatin1String("default")) == 0) {
dev = QLatin1String("hw:0,0");
} else {
int idx = 0;
char *name;
QString shortName = device.mid(device.indexOf(QLatin1String("="),0)+1);
while(snd_card_get_name(idx,&name) == 0) {
if(shortName.compare(QLatin1String(name)) == 0)
break;
idx++;
}
dev = QString(QLatin1String("hw:%1,0")).arg(idx);
}
#endif
snd_pcm_stream_t stream = mode == QAudio::AudioOutput
? SND_PCM_STREAM_PLAYBACK : SND_PCM_STREAM_CAPTURE;
if (snd_pcm_open(&pcmHandle, dev.toLocal8Bit().constData(), stream, 0) < 0)
return false;
snd_pcm_nonblock(pcmHandle, 0);
snd_pcm_hw_params_alloca(&params);
snd_pcm_hw_params_any(pcmHandle, params);
// set the values!
snd_pcm_hw_params_set_channels(pcmHandle, params, format.channelCount());
snd_pcm_hw_params_set_rate(pcmHandle, params, format.sampleRate(), 0);
snd_pcm_format_t pcmFormat = SND_PCM_FORMAT_UNKNOWN;
switch (format.sampleSize()) {
case 8:
if (format.sampleType() == QAudioFormat::SignedInt)
pcmFormat = SND_PCM_FORMAT_S8;
else if (format.sampleType() == QAudioFormat::UnSignedInt)
pcmFormat = SND_PCM_FORMAT_U8;
break;
case 16:
if (format.sampleType() == QAudioFormat::SignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_S16_LE : SND_PCM_FORMAT_S16_BE;
} else if (format.sampleType() == QAudioFormat::UnSignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_U16_LE : SND_PCM_FORMAT_U16_BE;
}
break;
case 32:
if (format.sampleType() == QAudioFormat::SignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_S32_LE : SND_PCM_FORMAT_S32_BE;
} else if (format.sampleType() == QAudioFormat::UnSignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_U32_LE : SND_PCM_FORMAT_U32_BE;
} else if (format.sampleType() == QAudioFormat::Float) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_FLOAT_LE : SND_PCM_FORMAT_FLOAT_BE;
}
}
if (pcmFormat != SND_PCM_FORMAT_UNKNOWN)
err = snd_pcm_hw_params_set_format(pcmHandle, params, pcmFormat);
// For now, just accept only audio/pcm codec
if (!format.codec().startsWith(QLatin1String("audio/pcm")))
err = -1;
if (err >= 0 && format.channelCount() != -1) {
err = snd_pcm_hw_params_test_channels(pcmHandle, params, format.channelCount());
if (err >= 0)
err = snd_pcm_hw_params_set_channels(pcmHandle, params, format.channelCount());
}
if (err >= 0 && format.sampleRate() != -1) {
err = snd_pcm_hw_params_test_rate(pcmHandle, params, format.sampleRate(), 0);
if (err >= 0)
err = snd_pcm_hw_params_set_rate(pcmHandle, params, format.sampleRate(), 0);
}
if (err >= 0 && pcmFormat != SND_PCM_FORMAT_UNKNOWN)
err = snd_pcm_hw_params_set_format(pcmHandle, params, pcmFormat);
if (err >= 0)
err = snd_pcm_hw_params(pcmHandle, params);
snd_pcm_close(pcmHandle);
return (err == 0);
}
void QAlsaAudioDeviceInfo::updateLists()
{
// redo all lists based on current settings
sampleRatez.clear();
channelz.clear();
sizez.clear();
byteOrderz.clear();
typez.clear();
codecz.clear();
if(!handle)
open();
if(!handle)
return;
for(int i=0; i<(int)MAX_SAMPLE_RATES; i++) {
//if(snd_pcm_hw_params_test_rate(handle, params, SAMPLE_RATES[i], dir) == 0)
sampleRatez.append(SAMPLE_RATES[i]);
}
channelz.append(1);
channelz.append(2);
if (surround40) channelz.append(4);
if (surround51) channelz.append(6);
if (surround71) channelz.append(8);
sizez.append(8);
sizez.append(16);
sizez.append(32);
byteOrderz.append(QAudioFormat::LittleEndian);
byteOrderz.append(QAudioFormat::BigEndian);
typez.append(QAudioFormat::SignedInt);
typez.append(QAudioFormat::UnSignedInt);
typez.append(QAudioFormat::Float);
codecz.append(QLatin1String("audio/pcm"));
close();
}
QList<QByteArray> QAlsaAudioDeviceInfo::availableDevices(QAudio::Mode mode)
{
QList<QByteArray> devices;
QByteArray filter;
#if (SND_LIB_MAJOR == 1 && (SND_LIB_MINOR > 0 || SND_LIB_SUBMINOR >= 14))
// Create a list of all current audio devices that support mode
void **hints, **n;
char *name, *descr, *io;
if(snd_device_name_hint(-1, "pcm", &hints) < 0) {
qWarning() << "no alsa devices available";
return devices;
}
n = hints;
if(mode == QAudio::AudioInput) {
filter = "Input";
} else {
filter = "Output";
}
while (*n != NULL) {
name = snd_device_name_get_hint(*n, "NAME");
if (name != 0 && qstrcmp(name, "null") != 0) {
descr = snd_device_name_get_hint(*n, "DESC");
io = snd_device_name_get_hint(*n, "IOID");
if ((descr != NULL) && ((io == NULL) || (io == filter))) {
QString deviceName = QLatin1String(name);
QString deviceDescription = QLatin1String(descr);
if (deviceDescription.contains(QLatin1String("Default Audio Device")))
devices.prepend(deviceName.toLocal8Bit().constData());
else
devices.append(deviceName.toLocal8Bit().constData());
}
free(descr);
free(io);
}
free(name);
++n;
}
snd_device_name_free_hint(hints);
#else
int idx = 0;
char* name;
while(snd_card_get_name(idx,&name) == 0) {
devices.append(name);
idx++;
}
#endif
if (devices.size() > 0)
devices.append("default");
return devices;
}
QByteArray QAlsaAudioDeviceInfo::defaultInputDevice()
{
QList<QByteArray> devices = availableDevices(QAudio::AudioInput);
if(devices.size() == 0)
return QByteArray();
return devices.first();
}
QByteArray QAlsaAudioDeviceInfo::defaultOutputDevice()
{
QList<QByteArray> devices = availableDevices(QAudio::AudioOutput);
if(devices.size() == 0)
return QByteArray();
return devices.first();
}
void QAlsaAudioDeviceInfo::checkSurround()
{
surround40 = false;
surround51 = false;
surround71 = false;
void **hints, **n;
char *name, *descr, *io;
if(snd_device_name_hint(-1, "pcm", &hints) < 0)
return;
n = hints;
while (*n != NULL) {
name = snd_device_name_get_hint(*n, "NAME");
descr = snd_device_name_get_hint(*n, "DESC");
io = snd_device_name_get_hint(*n, "IOID");
if((name != NULL) && (descr != NULL)) {
QString deviceName = QLatin1String(name);
if (mode == QAudio::AudioOutput) {
if(deviceName.contains(QLatin1String("surround40")))
surround40 = true;
if(deviceName.contains(QLatin1String("surround51")))
surround51 = true;
if(deviceName.contains(QLatin1String("surround71")))
surround71 = true;
}
}
if(name != NULL)
free(name);
if(descr != NULL)
free(descr);
if(io != NULL)
free(io);
++n;
}
snd_device_name_free_hint(hints);
}
QT_END_NAMESPACE
Reference in New Issue View Git Blame Copy Permalink