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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audio_encoder.cc
*
* Sat Sep 17 18:38:45 CEST 2005
* Copyright 2005 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of MIaV.
*
* MIaV 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.
*
* MIaV 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 MIaV; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "config.h"
#include "audio_encoder.h"
#include "util.h"
AudioEncoder::AudioEncoder(FramePriorityQueue *in, pthread_mutex_t *in_mutex, sem_t *in_sem,
FramePriorityQueue *out, pthread_mutex_t *out_mutex, sem_t *out_sem,
Info *i)
{
info = i;
info->info("AudioEncoder");
running = true;
// Queues
inputqueue = in;
outputqueue = out;
// Queue mutexes
input_mutex = in_mutex;
output_mutex = out_mutex;
input_sem = in_sem;
output_sem = out_sem;
frame_number = 0;
}
AudioEncoder::~AudioEncoder()
{
}
void AudioEncoder::thread_main()
{
info->info("AudioEncoder::run");
unsigned int queuesize = 0;
// Run with slightly lower priority than MovEncoderWriter
nice(2);
Frame *in_frame = NULL;
Frame *out_frame = NULL;
Frame *tmpframe;
LibLAMEWrapper lame(info);
while(running) {
sem_wait(input_sem);
// If no frame is in the buffer, get one from the queue
while( in_frame == NULL ) {
// sem_wait(input_sem);
// Lock output mutex
pthread_mutex_lock( input_mutex );
tmpframe = inputqueue->top();
if(tmpframe && tmpframe->number == frame_number) {
inputqueue->pop();
queuesize = inputqueue->size();
in_frame = tmpframe;
frame_number++;
}
pthread_mutex_unlock( input_mutex );
// Unlock output mutex
sleep_1_frame();
}
// Check for end of stream
if(in_frame->endOfFrameStream == true) {
info->info("endOfFrameStream in AudioEncoder");
running = false;
out_frame = lame.close();
} else {
// Encode audio
out_frame = lame.encode(in_frame);
}
out_frame->number = in_frame->number;
out_frame->endOfFrameStream = in_frame->endOfFrameStream;
delete in_frame;
in_frame = NULL;
// Lock output mutex
pthread_mutex_lock(output_mutex);
outputqueue->push(out_frame);
pthread_mutex_unlock(output_mutex);
// Unlock output mutex
// Kick multiplexer (audio)
sem_post(output_sem);
}
// Kick multiplexer (audio)
sem_post(output_sem);
info->info("AudioEncoder::stop");
}
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