You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
141 lines
3.4 KiB
141 lines
3.4 KiB
/*
|
|
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--;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|