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/*
pcm frame description.
Copyright (C) 2001 Martin Vogt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation.
For more information look at the file COPYRIGHT in this package
*/
#include "pcmFrame.h"
#include <iostream>
using namespace std;
#ifndef WORDS_BIGENDIAN
// this is fast on INTEL, but maybe not work on other little
// endian machines. (are there any?)
#define convMacro(in,dtemp,tmp) \
in[0]*=SCALFACTOR; \
dtemp = ((((65536.0 * 65536.0 * 16)+(65536.0 * 0.5))* 65536.0))+(in[0]); \
tmp = ((*(int *)&dtemp) - 0x80000000); \
in++; \
if(tmp>32767) { \
tmp=32767; \
} else if (tmp<-32768) { \
tmp =-0x8000; \
}
#else /* big endian conversion: _AIX */
static inline void convMacro(float*& in, double dtemp, int& tmp)
{
in[0]*=SCALFACTOR;
tmp = (int)*in;
in++;
if(tmp>32767) {
tmp=32767;
} else if (tmp<-32768) {
tmp =-0x8000;
}
tmp = ((tmp & 0xff) << 8) | ((tmp >> 8) & 0xff);
}
#endif /* _AIX */
PCMFrame::PCMFrame(int size) {
data=new short int[size];
len=0;
this->size=size;
// this format has a sampleSize of 16, signed, endian==machine
this->sampleSize=sizeof(short int)*8;
this->lSigned=true;
this->lBigEndian=AUDIOFRAME_BIGENDIAN;
setFrameType(_FRAME_AUDIO_PCM);
}
PCMFrame::~PCMFrame() {
delete [] data;
}
void PCMFrame::putFloatData(float* left,float* right,int copyLen) {
int destSize=0;
if (left != NULL) destSize++;
if (right != NULL) destSize++;
destSize*=copyLen;
if ((len+destSize) > size) {
cout << "cannot copy putFloatData L/R version . Does not fit"<<endl;
cout << "size:"<<size<<endl;
cout << "len:"<<len<<endl;
cout << "destSize:"<<destSize<<endl;
exit(0);
}
double dtemp;
int tmp;
int i=copyLen;
switch(getStereo()) {
case 1:
while(i > 0) {
convMacro(left,dtemp,tmp);
data[len++]=(short int)tmp;
convMacro(right,dtemp,tmp);
data[len++]=(short int)tmp;
i--;
}
break;
case 0:
if (left != NULL) {
int i=copyLen;
while(i > 0) {
convMacro(left,dtemp,tmp);
data[len++]=(short int)tmp;
i--;
// right channel empty
len++;
}
}
if (right != NULL) {
int i=copyLen;
len=len-destSize;
while(i > 0) {
// select right channel
len++;
convMacro(right,dtemp,tmp);
data[len++]=(short int)tmp;
i--;
// left channel already copied
}
}
break;
default:
cout << "unknown stereo value in pcmFrame"<<endl;
exit(0);
}
}
void PCMFrame::putFloatData(float* in,int lenCopy) {
if ((len+lenCopy) > size) {
cout << "cannot copy putFloatData. Does not fit"<<endl;
exit(0);
}
double dtemp;
int tmp;
while(lenCopy > 0) {
convMacro(in,dtemp,tmp);
data[len++]=(short int)tmp;
lenCopy--;
}
}
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