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/*
* audio.cpp: A program for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
* $Id$
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "audio.h"
cMarkAdAudio::cMarkAdAudio(MarkAdContext *maContext)
{
macontext=maContext;
mark.Position=0;
mark.Type=0;
Clear();
}
cMarkAdAudio::~cMarkAdAudio()
{
resetmark();
Clear();
}
void cMarkAdAudio::Clear()
{
framelast=0;
channels=0;
}
void cMarkAdAudio::resetmark()
{
if (!mark.Type) return;
memset(&mark,0,sizeof(mark));
}
void cMarkAdAudio::setmark(int type, int position, int channelsbefore, int channelsafter)
{
mark.ChannelsBefore=channelsbefore;
mark.ChannelsAfter=channelsafter;
mark.Position=position;
mark.Type=type;
}
bool cMarkAdAudio::channelchange(int a, int b)
{
if ((a==0) || (b==0)) return false;
if (a!=b) return true;
return false;
}
MarkAdMark *cMarkAdAudio::Process(int FrameNumber, int FrameNumberNext)
{
if ((!FrameNumber) || (!FrameNumberNext)) return NULL;
resetmark();
if (channelchange(macontext->Audio.Info.Channels,channels))
{
if (macontext->Audio.Info.Channels>2)
{
setmark(MT_CHANNELSTART,FrameNumberNext,channels,macontext->Audio.Info.Channels);
}
else
{
setmark(MT_CHANNELSTOP,framelast,channels,macontext->Audio.Info.Channels);
}
}
channels=macontext->Audio.Info.Channels;
framelast=FrameNumber;
if (mark.Position)
{
return &mark;
}
else
{
return NULL;
}
}
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