mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-08-25 15:26:33 -04:00
171 lines
4.5 KiB
C++
171 lines
4.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
|
|
// written by Christian Daniel //
|
|
// //
|
|
// This program is free software; you can redistribute it and/or modify //
|
|
// it under the terms of the GNU General Public License as published by //
|
|
// the Free Software Foundation as version 3 of the License, or //
|
|
// //
|
|
// This program is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <string.h>
|
|
#include <QAudioFormat>
|
|
#include <QAudioDeviceInfo>
|
|
#include <QAudioOutput>
|
|
#include "audio/audiooutput.h"
|
|
#include "audio/audiofifo.h"
|
|
|
|
AudioOutput::AudioOutput() :
|
|
m_mutex(),
|
|
m_audioOutput(NULL),
|
|
m_audioFifos()
|
|
{
|
|
}
|
|
|
|
AudioOutput::~AudioOutput()
|
|
{
|
|
stop();
|
|
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
for(AudioFifos::iterator it = m_audioFifos.begin(); it != m_audioFifos.end(); ++it)
|
|
delete *it;
|
|
m_audioFifos.clear();
|
|
}
|
|
|
|
bool AudioOutput::start(int device, int rate)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
Q_UNUSED(device);
|
|
Q_UNUSED(rate);
|
|
|
|
QAudioFormat format;
|
|
QAudioDeviceInfo devInfo(QAudioDeviceInfo::defaultOutputDevice());
|
|
|
|
format.setSampleRate(48000);
|
|
format.setChannelCount(2);
|
|
format.setSampleSize(16);
|
|
format.setCodec("audio/pcm");
|
|
format.setByteOrder(QAudioFormat::LittleEndian);
|
|
format.setSampleType(QAudioFormat::SignedInt);
|
|
|
|
if(!devInfo.isFormatSupported(format)) {
|
|
qWarning("48kHz S16_LE audio format not supported");
|
|
format = devInfo.nearestFormat(format);
|
|
}
|
|
|
|
if(format.sampleSize() != 16) {
|
|
qWarning("Audio device ( %s ) failed", qPrintable(devInfo.defaultOutputDevice().deviceName()));
|
|
return false;
|
|
}
|
|
|
|
m_audioOutput = new QAudioOutput(format);
|
|
|
|
QIODevice::open(QIODevice::ReadOnly);
|
|
|
|
m_audioOutput->start(this);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
void AudioOutput::stop()
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
if(m_audioOutput != NULL) {
|
|
m_audioOutput->stop();
|
|
delete m_audioOutput;
|
|
m_audioOutput = NULL;
|
|
}
|
|
QIODevice::close();
|
|
}
|
|
|
|
void AudioOutput::addFifo(AudioFifo* audioFifo)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
m_audioFifos.push_back(audioFifo);
|
|
}
|
|
|
|
void AudioOutput::removeFifo(AudioFifo* audioFifo)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
m_audioFifos.remove(audioFifo);
|
|
}
|
|
|
|
bool AudioOutput::open(OpenMode mode)
|
|
{
|
|
Q_UNUSED(mode);
|
|
return false;
|
|
}
|
|
|
|
qint64 AudioOutput::readData(char* data, qint64 maxLen)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
unsigned int framesPerBuffer = maxLen / 4;
|
|
if(framesPerBuffer == 0)
|
|
return 0;
|
|
|
|
if(m_mixBuffer.size() < framesPerBuffer * 2) {
|
|
m_mixBuffer.resize(framesPerBuffer * 2); // allocate 2 qint32 per frame (stereo)
|
|
if(m_mixBuffer.size() != framesPerBuffer * 2)
|
|
return 0;
|
|
}
|
|
memset(&m_mixBuffer[0], 0x00, 2 * framesPerBuffer * sizeof(m_mixBuffer[0])); // start with silence
|
|
|
|
// sum up a block from all fifos
|
|
for(AudioFifos::iterator it = m_audioFifos.begin(); it != m_audioFifos.end(); ++it) {
|
|
// use outputBuffer as temp - yes, one memcpy could be saved
|
|
uint samples = (*it)->read((quint8*)data, framesPerBuffer, 1);
|
|
const qint16* src = (const qint16*)data;
|
|
std::vector<qint32>::iterator dst = m_mixBuffer.begin();
|
|
for(uint i = 0; i < samples; i++) {
|
|
*dst += *src;
|
|
++src;
|
|
++dst;
|
|
*dst += *src;
|
|
++src;
|
|
++dst;
|
|
}
|
|
}
|
|
|
|
// convert to int16
|
|
std::vector<qint32>::const_iterator src = m_mixBuffer.begin();
|
|
qint16* dst = (qint16*)data;
|
|
for(uint i = 0; i < framesPerBuffer; i++) {
|
|
// left channel
|
|
qint32 s = *src++;
|
|
if(s < -32768)
|
|
s = -32768;
|
|
else if(s > 32767)
|
|
s = 32767;
|
|
*dst++ = s;
|
|
// right channel
|
|
s = *src++;
|
|
if(s < -32768)
|
|
s = -32768;
|
|
else if(s > 32767)
|
|
s = 32767;
|
|
*dst++ = s;
|
|
}
|
|
|
|
return framesPerBuffer * 4;
|
|
}
|
|
|
|
qint64 AudioOutput::writeData(const char* data, qint64 len)
|
|
{
|
|
Q_UNUSED(data);
|
|
Q_UNUSED(len);
|
|
return 0;
|
|
}
|