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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* opusencoder.cc
*
* Fri Sep 19 19:21:50 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of SimpleRTP.
*
* SimpleRTP 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; either version 2 of the License, or
* (at your option) any later version.
*
* SimpleRTP 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 SimpleRTP; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "opusencoder.h"
#include <string.h>
#include <opus/opus.h>
#include <stdio.h>
#include "samplecache.h"
#define OPUS_BITRATE 64000
struct opus_encoder_private_t {
OpusEncoder *ce;
SampleCache *cache;
};
OpusEncoder::OpusEncoder()
{
prv = new struct opus_encoder_private_t;
prv->cache = new SampleCache(5760 * 10);
int error = 0;
samplerate_t srate = opus_samplerate();
prv->ce =
opus_encoder_create(srate, 1/*channels()*/, OPUS_APPLICATION_AUDIO, &error);
if(!prv->ce || error != OPUS_OK) {
printf("srate: %d, ch: %d, Error: %d\n", srate, 1/*channels()*/, error);
//throw InitException();
}
// 500 to 512000
opus_encoder_ctl(prv->ce, OPUS_SET_BITRATE(OPUS_BITRATE/*bitrate()*/));
// [0-10] with 10 representing the highest complexity.
opus_encoder_ctl(prv->ce, OPUS_SET_COMPLEXITY(10));
/*
printf("Encoder(fs: %d, ch: %d, bitrate: %d)\n", srate, channels(),
bitrate());
*/
}
OpusEncoder::~OpusEncoder()
{
if(prv) {
if(prv->ce) opus_encoder_destroy(prv->ce);
if(prv->cache) delete prv->cache;
delete prv;
}
}
unsigned int OpusEncoder::framesize()
{
return opus_samplerate() / 1000 * OPUS_FRAME_SIZE; // 10ms audio data
}
samplerate_t OpusEncoder::opus_samplerate()
{
return 48000;
}
framelist_t OpusEncoder::encode(const char *pcm, size_t size)
{
framelist_t list;
// printf("PCM size: %d\n", size);
samplerate_t srate = opus_samplerate();
if(prv->ce == NULL) {
//throw InitException();
printf("prv->ce == NULL\n");
}
size_t bytes_per_packet = ((OPUS_BITRATE/*bitrate()*/ *framesize())/srate+4)/8;
prv->cache->addSamples((short*)pcm, size / sizeof(short));
//size_t p = 0;
opus_int16 *samples = new opus_int16[framesize()];
while(prv->cache->cacheSize() >= framesize()) {
size_t sz = prv->cache->getSamples(samples, framesize());
Frame *frame = new Frame(bytes_per_packet);
int n = opus_encode(prv->ce, samples, sz / 1/*channels()*//*sizeof(short)*/,
(unsigned char *)frame->data, (opus_int32)frame->size);
//printf("Compressed to %d\n", n);
if(n < 0) {
printf("n < 0\n");
//throw EncodingException();
}
frame->size = n;
list.push_back(frame);
}
delete[] samples;
//printf("%d frames in list\n", list.size());
return list;
}
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