mirror of
https://github.com/f4exb/sdrangel.git
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349 lines
9.3 KiB
C++
349 lines
9.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <string.h>
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#include <QAudioFormat>
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#include <QAudioDeviceInfo>
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#include <QAudioOutput>
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#include "audio/audiooutput.h"
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#include "audio/audiofifo.h"
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AudioOutput::AudioOutput() :
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m_mutex(QMutex::Recursive),
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m_audioOutput(0),
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m_audioUsageCount(0),
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m_onExit(false),
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m_audioFifos()
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{
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}
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AudioOutput::~AudioOutput()
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{
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stop();
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QMutexLocker mutexLocker(&m_mutex);
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for (AudioFifos::iterator it = m_audioFifos.begin(); it != m_audioFifos.end(); ++it)
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{
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delete *it;
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}
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m_audioFifos.clear();
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}
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bool AudioOutput::start(int device, int rate)
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{
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if (m_audioUsageCount == 0)
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{
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QMutexLocker mutexLocker(&m_mutex);
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QAudioDeviceInfo devInfo;
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if (device < 0)
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{
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devInfo = QAudioDeviceInfo::defaultOutputDevice();
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qWarning("AudioOutput::start: using default device %s", qPrintable(devInfo.defaultOutputDevice().deviceName()));
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}
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else
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{
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QList<QAudioDeviceInfo> devicesInfo = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
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if (device < devicesInfo.size())
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{
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devInfo = devicesInfo[device];
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qWarning("AudioOutput::start: using audio device #%d: %s", device, qPrintable(devInfo.defaultOutputDevice().deviceName()));
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}
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else
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{
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devInfo = QAudioDeviceInfo::defaultOutputDevice();
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qWarning("AudioOutput::start: audio device #%d does not exist. Using default device %s", device, qPrintable(devInfo.defaultOutputDevice().deviceName()));
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}
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}
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//QAudioDeviceInfo devInfo(QAudioDeviceInfo::defaultOutputDevice());
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m_audioFormat.setSampleRate(rate);
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m_audioFormat.setChannelCount(2);
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m_audioFormat.setSampleSize(16);
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m_audioFormat.setCodec("audio/pcm");
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m_audioFormat.setByteOrder(QAudioFormat::LittleEndian);
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m_audioFormat.setSampleType(QAudioFormat::SignedInt);
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if (!devInfo.isFormatSupported(m_audioFormat))
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{
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m_audioFormat = devInfo.nearestFormat(m_audioFormat);
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qWarning("AudioOutput::start: %d Hz S16_LE audio format not supported. New rate: %d", rate, m_audioFormat.sampleRate());
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}
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else
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{
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qInfo("AudioOutput::start: audio format OK");
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}
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if (m_audioFormat.sampleSize() != 16)
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{
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qWarning("AudioOutput::start: Audio device ( %s ) failed", qPrintable(devInfo.defaultOutputDevice().deviceName()));
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return false;
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}
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m_audioOutput = new QAudioOutput(devInfo, m_audioFormat);
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QIODevice::open(QIODevice::ReadOnly);
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m_audioOutput->start(this);
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if (m_audioOutput->state() != QAudio::ActiveState)
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{
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qWarning("AudioOutput::start: cannot start");
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}
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}
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m_audioUsageCount++;
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return true;
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}
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bool AudioOutput::startImmediate(int device, int rate)
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{
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if (QIODevice::isOpen())
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{
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qInfo("AudioOutput::startImmediate: already open");
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return true;
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}
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QMutexLocker mutexLocker(&m_mutex);
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QAudioDeviceInfo devInfo;
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if (device < 0)
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{
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devInfo = QAudioDeviceInfo::defaultOutputDevice();
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qWarning("AudioOutput::startImmediate: using default device %s", qPrintable(devInfo.defaultOutputDevice().deviceName()));
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}
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else
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{
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QList<QAudioDeviceInfo> devicesInfo = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
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if (device < devicesInfo.size())
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{
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devInfo = devicesInfo[device];
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qWarning("AudioOutput::startImmediate: using audio device #%d: %s", device, qPrintable(devInfo.defaultOutputDevice().deviceName()));
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}
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else
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{
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devInfo = QAudioDeviceInfo::defaultOutputDevice();
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qWarning("AudioOutput::startImmediate: audio device #%d does not exist. Using default device %s", device, qPrintable(devInfo.defaultOutputDevice().deviceName()));
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}
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}
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//QAudioDeviceInfo devInfo(QAudioDeviceInfo::defaultOutputDevice());
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m_audioFormat.setSampleRate(rate);
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m_audioFormat.setChannelCount(2);
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m_audioFormat.setSampleSize(16);
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m_audioFormat.setCodec("audio/pcm");
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m_audioFormat.setByteOrder(QAudioFormat::LittleEndian);
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m_audioFormat.setSampleType(QAudioFormat::SignedInt);
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if (!devInfo.isFormatSupported(m_audioFormat))
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{
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m_audioFormat = devInfo.nearestFormat(m_audioFormat);
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qWarning("AudioOutput::startImmediate: %d Hz S16_LE audio format not supported. New rate: %d", rate, m_audioFormat.sampleRate());
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}
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else
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{
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qInfo("AudioOutput::startImmediate: audio format OK");
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}
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if (m_audioFormat.sampleSize() != 16)
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{
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qWarning("AudioOutput::startImmediate: Audio device ( %s ) failed", qPrintable(devInfo.defaultOutputDevice().deviceName()));
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return false;
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}
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m_audioOutput = new QAudioOutput(devInfo, m_audioFormat);
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QIODevice::open(QIODevice::ReadOnly);
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m_audioOutput->start(this);
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if (m_audioOutput->state() != QAudio::ActiveState)
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{
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qWarning("AudioOutput::startImmediate: cannot start");
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}
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return true;
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}
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void AudioOutput::stop()
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{
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qDebug("AudioOutput::stop");
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if (m_audioUsageCount > 0)
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{
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m_audioUsageCount--;
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if (m_audioUsageCount == 0)
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{
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QMutexLocker mutexLocker(&m_mutex);
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QIODevice::close();
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if (!m_onExit) {
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delete m_audioOutput;
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}
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}
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}
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}
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void AudioOutput::stopImmediate()
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{
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if (!QIODevice::isOpen())
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{
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qInfo("AudioOutput::stopImmediate");
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}
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else
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{
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qDebug("AudioOutput::stopImmediate");
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QMutexLocker mutexLocker(&m_mutex);
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QIODevice::close();
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delete m_audioOutput;
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}
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}
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void AudioOutput::addFifo(AudioFifo* audioFifo)
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{
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QMutexLocker mutexLocker(&m_mutex);
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m_audioFifos.push_back(audioFifo);
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}
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void AudioOutput::removeFifo(AudioFifo* audioFifo)
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{
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QMutexLocker mutexLocker(&m_mutex);
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m_audioFifos.remove(audioFifo);
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}
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/*
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bool AudioOutput::open(OpenMode mode)
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{
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Q_UNUSED(mode);
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return false;
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}*/
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qint64 AudioOutput::readData(char* data, qint64 maxLen)
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{
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//qDebug("AudioOutput::readData: %lld", maxLen);
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// Study this mutex on OSX, for now deadlocks possible
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// Removed as it may indeed cause lockups and is in fact useless.
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//#ifndef __APPLE__
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// QMutexLocker mutexLocker(&m_mutex);
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//#endif
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unsigned int framesPerBuffer = maxLen / 4;
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if (framesPerBuffer == 0)
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{
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return 0;
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}
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if (m_mixBuffer.size() < framesPerBuffer * 2)
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{
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m_mixBuffer.resize(framesPerBuffer * 2); // allocate 2 qint32 per frame (stereo)
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if (m_mixBuffer.size() != framesPerBuffer * 2)
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{
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return 0;
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}
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}
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memset(&m_mixBuffer[0], 0x00, 2 * framesPerBuffer * sizeof(m_mixBuffer[0])); // start with silence
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// sum up a block from all fifos
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for (AudioFifos::iterator it = m_audioFifos.begin(); it != m_audioFifos.end(); ++it)
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{
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// use outputBuffer as temp - yes, one memcpy could be saved
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uint samples = (*it)->read((quint8*) data, framesPerBuffer, 1);
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const qint16* src = (const qint16*) data;
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std::vector<qint32>::iterator dst = m_mixBuffer.begin();
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// if (samples != framesPerBuffer)
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// {
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// qDebug("AudioOutput::readData: read %d samples vs %d requested", samples, framesPerBuffer);
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// }
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for (uint i = 0; i < samples; i++)
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{
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*dst += *src;
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++src;
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++dst;
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*dst += *src;
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++src;
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++dst;
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}
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}
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// convert to int16
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//std::vector<qint32>::const_iterator src = m_mixBuffer.begin(); // Valgrind optim
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qint16* dst = (qint16*) data;
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qint32 s;
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for (uint i = 0; i < framesPerBuffer; i++)
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{
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// left channel
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//s = *src++; // Valgrind optim
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s = m_mixBuffer[2*i];
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if(s < -32768)
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{
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s = -32768;
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}
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else if (s > 32767)
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{
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s = 32767;
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}
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*dst++ = s;
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// right channel
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//s = *src++; // Valgrind optim
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s = m_mixBuffer[2*i + 1];
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if(s < -32768)
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{
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s = -32768;
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}
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else if (s > 32767)
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{
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s = 32767;
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}
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*dst++ = s;
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}
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return framesPerBuffer * 4;
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}
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qint64 AudioOutput::writeData(const char* data, qint64 len)
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{
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Q_UNUSED(data);
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Q_UNUSED(len);
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return 0;
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}
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