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/************************************************************************************
This source file is part of the Theora Video Playback Library
For latest info, see http://libtheoraplayer.googlecode.com
*************************************************************************************
Copyright (c) 2008-2014 Kresimir Spes (kspes@cateia.com)
This program is free software; you can redistribute it and/or modify it under
the terms of the BSD license: http://opensource.org/licenses/BSD-3-Clause
*************************************************************************************/
#include <stdlib.h>
#include "TheoraAudioPacketQueue.h"
#include "TheoraAudioInterface.h"
TheoraAudioPacketQueue::TheoraAudioPacketQueue()
{
mTheoraAudioPacketQueue = NULL;
}
TheoraAudioPacketQueue::~TheoraAudioPacketQueue()
{
destroyAllAudioPackets();
}
float TheoraAudioPacketQueue::getAudioPacketQueueLength()
{
float len = 0;
for (TheoraAudioPacket* p = mTheoraAudioPacketQueue; p != NULL; p = p->next)
len += p->numSamples;
return len / (mAudioFrequency * mNumAudioChannels);
}
void TheoraAudioPacketQueue::_addAudioPacket(float* data, int numSamples)
{
TheoraAudioPacket* packet = new TheoraAudioPacket;
packet->pcm = data;
packet->numSamples = numSamples;
packet->next = NULL;
if (mTheoraAudioPacketQueue == NULL) mTheoraAudioPacketQueue = packet;
else
{
TheoraAudioPacket* last = mTheoraAudioPacketQueue;
for (TheoraAudioPacket* p = last; p != NULL; p = p->next)
last = p;
last->next = packet;
}
}
void TheoraAudioPacketQueue::addAudioPacket(float** buffer, int numSamples, float gain)
{
float* data = new float[numSamples * mNumAudioChannels];
float* dataptr = data;
int i;
unsigned int j;
if (gain < 1.0f)
{
// apply gain, let's attenuate the samples
for (i = 0; i < numSamples; ++i)
for (j = 0; j < mNumAudioChannels; j++, ++dataptr)
*dataptr = buffer[i][j] * gain;
}
else
{
// do a simple copy, faster then the above method, when gain is 1.0f
for (i = 0; i < numSamples; ++i)
for (j = 0; j < mNumAudioChannels; j++, ++dataptr)
*dataptr = buffer[j][i];
}
_addAudioPacket(data, numSamples * mNumAudioChannels);
}
void TheoraAudioPacketQueue::addAudioPacket(float* buffer, int numSamples, float gain)
{
float* data = new float[numSamples * mNumAudioChannels];
float* dataptr = data;
int i, numFloats = numSamples * mNumAudioChannels;
if (gain < 1.0f)
{
// apply gain, let's attenuate the samples
for (i = 0; i < numFloats; ++i, dataptr++)
*dataptr = buffer[i] * gain;
}
else
{
// do a simple copy, faster then the above method, when gain is 1.0f
for (i = 0; i < numFloats; ++i, dataptr++)
*dataptr = buffer[i];
}
_addAudioPacket(data, numFloats);
}
TheoraAudioPacket* TheoraAudioPacketQueue::popAudioPacket()
{
if (mTheoraAudioPacketQueue == NULL) return NULL;
TheoraAudioPacket* p = mTheoraAudioPacketQueue;
mTheoraAudioPacketQueue = mTheoraAudioPacketQueue->next;
return p;
}
void TheoraAudioPacketQueue::destroyAudioPacket(TheoraAudioPacket* p)
{
if (p == NULL) return;
delete [] p->pcm;
delete p;
}
void TheoraAudioPacketQueue::destroyAllAudioPackets()
{
for (TheoraAudioPacket* p = popAudioPacket(); p != NULL; p = popAudioPacket())
destroyAudioPacket(p);
}
void TheoraAudioPacketQueue::flushAudioPackets(TheoraAudioInterface* audioInterface)
{
for (TheoraAudioPacket* p = popAudioPacket(); p != NULL; p = popAudioPacket())
{
audioInterface->insertData(p->pcm, p->numSamples);
destroyAudioPacket(p);
}
}
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