mirror of
https://github.com/f4exb/sdrangel.git
synced 2025-11-03 13:11:20 -05:00
106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2019-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
|
|
// Copyright (C) 2022 Jiří Pinkava <jiri.pinkava@rossum.ai> //
|
|
// //
|
|
// In this version we will use a fixed constant bit rate of 64kbit/s. //
|
|
// With a frame time of 20ms the encoder output size is always 160 bytes. //
|
|
// //
|
|
// 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 //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// 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 "opus/opus.h"
|
|
#include <QDebug>
|
|
#include <QMutexLocker>
|
|
|
|
#include "audioopus.h"
|
|
|
|
AudioOpus::AudioOpus() :
|
|
m_encoderState(0),
|
|
m_encoderOK(false)
|
|
{
|
|
qDebug("AudioOpus::AudioOpus: libopus version %s", opus_get_version_string());
|
|
}
|
|
|
|
AudioOpus::~AudioOpus()
|
|
{
|
|
if (m_encoderState) {
|
|
opus_encoder_destroy(m_encoderState);
|
|
}
|
|
}
|
|
|
|
void AudioOpus::setEncoder(int32_t fs, int nChannels)
|
|
{
|
|
int error;
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
if (m_encoderState) {
|
|
opus_encoder_destroy(m_encoderState);
|
|
}
|
|
|
|
m_encoderState = opus_encoder_create(fs, nChannels, OPUS_APPLICATION_AUDIO, &error);
|
|
|
|
if (error != OPUS_OK)
|
|
{
|
|
qWarning("AudioOpus::setEncoder: error: %s", opus_strerror(error));
|
|
m_encoderOK = false;
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
qDebug("AudioOpus::setEncoder: fs: %d, nChannels: %d", fs, nChannels);
|
|
m_encoderOK = true;
|
|
}
|
|
|
|
error = opus_encoder_ctl(m_encoderState, OPUS_SET_BITRATE(m_bitrate));
|
|
|
|
if (error != OPUS_OK)
|
|
{
|
|
qWarning("AudioOpus::setEncoder: set bitrate error: %s", opus_strerror(error));
|
|
m_encoderOK = false;
|
|
return;
|
|
}
|
|
|
|
error = opus_encoder_ctl(m_encoderState, OPUS_SET_VBR(0)); // force constant bit rate
|
|
|
|
if (error != OPUS_OK)
|
|
{
|
|
qWarning("AudioOpus::setEncoder: set constant bitrate error: %s", opus_strerror(error));
|
|
m_encoderOK = false;
|
|
return;
|
|
}
|
|
}
|
|
|
|
int AudioOpus::encode(int frameSize, int16_t *in, uint8_t *out)
|
|
{
|
|
QMutexLocker mutexLocker(&m_mutex);
|
|
|
|
if (!m_encoderOK)
|
|
{
|
|
qWarning("AudioOpus::encode: encoder not initialized");
|
|
return 0;
|
|
}
|
|
|
|
int nbBytes = opus_encode(m_encoderState, in, frameSize, out, m_maxPacketSize);
|
|
|
|
if (nbBytes < 0)
|
|
{
|
|
qWarning("AudioOpus::encode failed: %s", opus_strerror(nbBytes));
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return nbBytes;
|
|
}
|
|
}
|