diff options
Diffstat (limited to 'src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp')
| -rw-r--r-- | src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp b/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp new file mode 100644 index 0000000..36270a7 --- /dev/null +++ b/src/multimedia/audio/qaudiodeviceinfo_alsa_p.cpp @@ -0,0 +1,486 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtMultimedia module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// 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. +// +// We mean it. +// + +#include "qaudiodeviceinfo_alsa_p.h" + +#include <alsa/version.h> + +QT_BEGIN_NAMESPACE + +QAudioDeviceInfoInternal::QAudioDeviceInfoInternal(QByteArray dev, QAudio::Mode mode) +{ + handle = 0; + + device = QLatin1String(dev); + this->mode = mode; +} + +QAudioDeviceInfoInternal::~QAudioDeviceInfoInternal() +{ + close(); +} + +bool QAudioDeviceInfoInternal::isFormatSupported(const QAudioFormat& format) const +{ + return testSettings(format); +} + +QAudioFormat QAudioDeviceInfoInternal::preferredFormat() const +{ + QAudioFormat nearest; + if(mode == QAudio::AudioOutput) { + nearest.setFrequency(44100); + nearest.setChannels(2); + nearest.setByteOrder(QAudioFormat::LittleEndian); + nearest.setSampleType(QAudioFormat::SignedInt); + nearest.setSampleSize(16); + nearest.setCodec(QLatin1String("audio/pcm")); + } else { + nearest.setFrequency(8000); + nearest.setChannels(1); + nearest.setSampleType(QAudioFormat::UnSignedInt); + nearest.setSampleSize(8); + nearest.setCodec(QLatin1String("audio/pcm")); + if(!testSettings(nearest)) { + nearest.setChannels(2); + nearest.setSampleSize(16); + nearest.setSampleType(QAudioFormat::SignedInt); + } + } + return nearest; +} + +QAudioFormat QAudioDeviceInfoInternal::nearestFormat(const QAudioFormat& format) const +{ + if(testSettings(format)) + return format; + else + return preferredFormat(); +} + +QString QAudioDeviceInfoInternal::deviceName() const +{ + return device; +} + +QStringList QAudioDeviceInfoInternal::codecList() +{ + updateLists(); + return codecz; +} + +QList<int> QAudioDeviceInfoInternal::frequencyList() +{ + updateLists(); + return freqz; +} + +QList<int> QAudioDeviceInfoInternal::channelsList() +{ + updateLists(); + return channelz; +} + +QList<int> QAudioDeviceInfoInternal::sampleSizeList() +{ + updateLists(); + return sizez; +} + +QList<QAudioFormat::Endian> QAudioDeviceInfoInternal::byteOrderList() +{ + updateLists(); + return byteOrderz; +} + +QList<QAudioFormat::SampleType> QAudioDeviceInfoInternal::sampleTypeList() +{ + updateLists(); + return typez; +} + +bool QAudioDeviceInfoInternal::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) + dev = QLatin1String(devices.first().constData()); +#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 QAudioDeviceInfoInternal::close() +{ + if(handle) + snd_pcm_close(handle); + handle = 0; +} + +bool QAudioDeviceInfoInternal::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 = 0; + snd_pcm_t* handle; + snd_pcm_hw_params_t *params; + QString dev = device; + + QList<QByteArray> devices = QAudioDeviceInfoInternal::availableDevices(QAudio::AudioOutput); + + if(dev.compare(QLatin1String("default")) == 0) { +#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14) + dev = QLatin1String(devices.first().constData()); +#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(shortName.compare(QLatin1String(name)) == 0) + 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; + } + + bool testChannel = false; + bool testCodec = false; + bool testFreq = false; + bool testType = false; + bool testSize = false; + + int dir = 0; + + snd_pcm_nonblock( handle, 0 ); + snd_pcm_hw_params_alloca( ¶ms ); + snd_pcm_hw_params_any( handle, params ); + + // set the values! + snd_pcm_hw_params_set_channels(handle,params,format.channels()); + snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir); + switch(format.sampleSize()) { + case 8: + if(format.sampleType() == QAudioFormat::SignedInt) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8); + else if(format.sampleType() == QAudioFormat::UnSignedInt) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8); + break; + case 16: + if(format.sampleType() == QAudioFormat::SignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE); + } else if(format.sampleType() == QAudioFormat::UnSignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE); + } + break; + case 32: + if(format.sampleType() == QAudioFormat::SignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE); + } else if(format.sampleType() == QAudioFormat::UnSignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE); + } + } + + // For now, just accept only audio/pcm codec + if(!format.codec().startsWith(QLatin1String("audio/pcm"))) { + err=-1; + } else + testCodec = true; + + if(err>=0 && format.channels() != -1) { + err = snd_pcm_hw_params_test_channels(handle,params,format.channels()); + if(err>=0) + err = snd_pcm_hw_params_set_channels(handle,params,format.channels()); + if(err>=0) + testChannel = true; + } + + if(err>=0 && format.frequency() != -1) { + err = snd_pcm_hw_params_test_rate(handle,params,format.frequency(),0); + if(err>=0) + err = snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir); + if(err>=0) + testFreq = true; + } + + if((err>=0 && format.sampleSize() != -1) && + (format.sampleType() != QAudioFormat::Unknown)) { + switch(format.sampleSize()) { + case 8: + if(format.sampleType() == QAudioFormat::SignedInt) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8); + else if(format.sampleType() == QAudioFormat::UnSignedInt) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8); + break; + case 16: + if(format.sampleType() == QAudioFormat::SignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE); + } else if(format.sampleType() == QAudioFormat::UnSignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE); + } + break; + case 32: + if(format.sampleType() == QAudioFormat::SignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE); + } else if(format.sampleType() == QAudioFormat::UnSignedInt) { + if(format.byteOrder() == QAudioFormat::LittleEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE); + else if(format.byteOrder() == QAudioFormat::BigEndian) + err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE); + } + } + if(err>=0) { + testSize = true; + testType = true; + } + } + if(err>=0) + err = snd_pcm_hw_params(handle, params); + + if(err == 0) { + // settings work + // close() + if(handle) + snd_pcm_close(handle); + return true; + } + if(handle) + snd_pcm_close(handle); + + return false; +} + +void QAudioDeviceInfoInternal::updateLists() +{ + // redo all lists based on current settings + freqz.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) + freqz.append(SAMPLE_RATES[i]); + } + channelz.append(1); + channelz.append(2); + 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> QAudioDeviceInfoInternal::availableDevices(QAudio::Mode mode) +{ + QList<QByteArray> allDevices; + 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"); + descr = snd_device_name_get_hint(*n, "DESC"); + io = snd_device_name_get_hint(*n, "IOID"); + if((name != NULL) && (descr != NULL) && ((io == NULL) || (io == filter))) { + QString deviceName = QLatin1String(name); + QString deviceDescription = QLatin1String(descr); + allDevices.append(deviceName.toLocal8Bit().constData()); + if(deviceDescription.contains(QLatin1String("Default Audio Device"))) + devices.append(deviceName.toLocal8Bit().constData()); + } + if(name != NULL) + free(name); + if(descr != NULL) + free(descr); + if(io != NULL) + free(io); + ++n; + } + snd_device_name_free_hint(hints); + + if(devices.size() > 0) { + devices.append("default"); + } +#else + int idx = 0; + char* name; + + while(snd_card_get_name(idx,&name) == 0) { + devices.append(name); + idx++; + } + if (idx > 0) + devices.append("default"); +#endif + if (devices.size() == 0 && allDevices.size() > 0) + return allDevices; + + return devices; +} + +QByteArray QAudioDeviceInfoInternal::defaultInputDevice() +{ + QList<QByteArray> devices = availableDevices(QAudio::AudioInput); + if(devices.size() == 0) + return QByteArray(); + + return devices.first(); +} + +QByteArray QAudioDeviceInfoInternal::defaultOutputDevice() +{ + QList<QByteArray> devices = availableDevices(QAudio::AudioOutput); + if(devices.size() == 0) + return QByteArray(); + + return devices.first(); +} + +QT_END_NAMESPACE |