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/**
* Navit, a modular navigation system.
* Copyright (C) 2017-2017 Navit Team
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
// style with: clang-format -style=WebKit -i *
#include "Qt5EspeakAudioOut.h"
extern "C" {
#include "debug.h"
}
Qt5EspeakAudioOut::Qt5EspeakAudioOut(int samplerate, const char* category) {
data = new QByteArray();
buffer = new QBuffer(data);
buffer->open(QIODevice::ReadWrite);
QAudioFormat format;
// Set up the format, eg.
format.setSampleRate(samplerate);
format.setChannelCount(1);
format.setSampleSize(16);
format.setCodec("audio/pcm");
format.setByteOrder(QAudioFormat::LittleEndian);
format.setSampleType(QAudioFormat::SignedInt);
QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
if (!info.isFormatSupported(format)) {
dbg(lvl_error,
"Raw audio format not supported by backend, cannot play audio.");
return;
}
audio = new QAudioOutput(format, this);
/* try to set a rather huge buffer size in order to avoid chopping due to
* event loop
* not getting idle. Drawing may take just too long time. This hopefully
* removes the
* need to do multi threading with all its problems. May be a problem on
* systems with
* really low memory.*/
audio->setBufferSize((samplerate * 1 /*ch*/ * 2 /*samplezize*/) * 5 /*seconds*/);
dbg(lvl_debug, "Buffer size is: %d", audio->bufferSize());
if (category != NULL)
audio->setCategory(QString(category));
connect(audio, SIGNAL(stateChanged(QAudio::State)), this,
SLOT(handleStateChanged(QAudio::State)));
/* to cope with resume coming from other thread (of libespeak)*/
connect(this, SIGNAL(call_resume(int)), this, SLOT(resume(int)));
}
Qt5EspeakAudioOut::~Qt5EspeakAudioOut() {
delete (audio);
audio = NULL;
delete (buffer);
buffer = NULL;
delete (data);
data = NULL;
}
void Qt5EspeakAudioOut::handleStateChanged(QAudio::State newState) {
dbg(lvl_debug, "Enter %d", newState);
switch (newState) {
case QAudio::ActiveState:
break;
case QAudio::SuspendedState:
break;
case QAudio::StoppedState:
break;
// Sailfish's QT version doesn't have this. Doesn't do anything either.
// case QAudio::InterruptedState:
// break;
case QAudio::IdleState:
/*remove all data that was already read*/
data->remove(0, buffer->pos());
buffer->seek(0);
dbg(lvl_debug, "Size %d", data->size());
break;
}
}
void Qt5EspeakAudioOut::resume(int state) {
dbg(lvl_debug, "Enter %d", state);
if (audio->state() != QAudio::ActiveState)
audio->start(buffer);
}
void Qt5EspeakAudioOut::addSamples(short* wav, int numsamples) {
dbg(lvl_debug, "Enter (%d samples)", numsamples);
/*remove all data that was already read (if any)*/
data->remove(0, buffer->pos());
buffer->seek(0);
if (numsamples > 0) {
data->append((const char*)wav, numsamples * sizeof(short));
dbg(lvl_debug, "%ld samples in buffer",
(long int)(buffer->size() / sizeof(short)));
emit call_resume(numsamples);
}
}
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