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/*
* dxr3output-audio.c
*
* Copyright (C) 2002-2004 Kai Möller
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdio.h>
#include <time.h>
#include "dxr3output.h"
#include "dxr3audio.h"
#include "dxr3pesframe.h"
// ==================================
const int AUDIO_OFFSET = 4500;
#define SCR m_dxr3Device->GetSysClock()
// ==================================
// ==================================
//! constr.
cDxr3AudioOutThread::cDxr3AudioOutThread(cDxr3SyncBuffer& buffer) :
cDxr3OutputThread(buffer)
{
SetDescription("DXR3 audio output");
}
// ==================================
//! thread action
void cDxr3AudioOutThread::Action()
{
bool resync = false;
uint32_t pts = 0;
while (Running())
{
pts = 0;
cFixedLengthFrame* pNext = m_buffer.Get();
if (pNext) pts = pNext->GetPts();
if ((pts && abs((int)pts-(int)SCR) > 30000))
{
m_buffer.Clear();
m_bNeedResync = true;
}
else if (pNext)
{
if (!pts || pts < SCR)
{
if (!pts && resync)
{
continue;
}
else
{
resync = false;
}
if (pts && (pts < SCR) && ((SCR - pts) > 5000))
{
m_dxr3Device->SetSysClock(pts + 1 * AUDIO_OFFSET);
PlayFrame(pNext);
if (m_buffer.IsPolled())
{
m_buffer.Clear();
m_bNeedResync = true;
}
}
else
{
PlayFrame(pNext);
m_buffer.Pop();
}
}
else
{
if (abs((int)pts - (int)SCR) < (AUDIO_OFFSET ))
{
PlayFrame(pNext);
m_buffer.Pop();
}
}
}
if ((pts > SCR && abs((int)pts - (int)SCR) > AUDIO_OFFSET))
{
cCondWait::SleepMs(10);
}
}
}
void cDxr3AudioOutThread::PlayFrame(cFixedLengthFrame *frame)
{
// only call setup and manipulate the volume for analog audio
if (!audioOutput->isDigitalAudio()) {
// update audio context
SampleContext ctx;
ctx.samplerate = frame->samplerate();
ctx.channels = frame->channels();
// TODO find cause why we need this workaround
if (ctx.samplerate != -1 && ctx.channels != -1) {
audioOutput->setup(ctx);
} else {
dsyslog("[fixme] samplerate: %d channels: %d", ctx.samplerate, ctx.channels);
}
// volume changes
audioOutput->changeVolume((short *)frame->GetData(), (size_t)frame->GetCount());
}
audioOutput->write(frame->GetData(), frame->GetCount());
}
#undef SCR
// Local variables:
// mode: c++
// c-file-style: "stroustrup"
// c-file-offsets: ((inline-open . 0))
// tab-width: 4;
// indent-tabs-mode: nil
// End:
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