144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
/*
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pcm frame description.
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Copyright (C) 2001 Martin Vogt
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as published by
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the Free Software Foundation.
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For more information look at the file License.txt in this package
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*/
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//changes 8/4/2002 (by Hauke Duden):
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// - removed cout and exit stuff
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// - added #include <new> to ensure that bad_alloc will be thrown on mem error
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#include "pcmFrame.h"
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#include <stdlib.h>
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#include <new>
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#include <limits.h>
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#include <string.h>
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//anscheinend ist die range der Werte -1,1
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/*#define convMacro(in,dtemp,tmp) \
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tmp=(int)(in[0]*32768*0.9f); \
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in++; \
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if(tmp>32767) \
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tmp=32767; \
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else if(tmp<-32768) \
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tmp=-32768;*/
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#define convMacro(in,dtemp,tmp) \
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in[0]*=SCALFACTOR; \
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dtemp = ((((65536.0 * 65536.0 * 16)+(65536.0 * 0.5))* 65536.0))+(in[0]); \
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tmp = ((*(int *)&dtemp) - 0x80000000); \
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in++; \
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if(tmp>32767) { \
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tmp=32767; \
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} else if (tmp<-32768) { \
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tmp =-0x8000; \
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}
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PCMFrame::PCMFrame(int size) {
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data=new short int[size];
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len=0;
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this->size=size;
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// this format has a sampleSize of 16, signed, endian==machine
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this->sampleSize=sizeof(short int)*8;
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this->lSigned=true;
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this->lBigEndian=AUDIOFRAME_BIGENDIAN;
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setFrameType(_FRAME_AUDIO_PCM);
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}
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PCMFrame::~PCMFrame() {
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delete data;
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}
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void PCMFrame::putFloatData(float* left,float* right,int copyLen) {
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int destSize=0;
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if (left != NULL) destSize++;
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if (right != NULL) destSize++;
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destSize*=copyLen;
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/*if ((len+destSize) > size) {
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cout << "cannot copy putFloatData L/R version . Does not fit"<<endl;
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exit(0);
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}*/
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double dtemp;
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int tmp;
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int i=copyLen;
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switch(getStereo()) {
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case 1:
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while(i > 0) {
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convMacro(left,dtemp,tmp);
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data[len++]=(short int)tmp;
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convMacro(right,dtemp,tmp);
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data[len++]=(short int)tmp;
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i--;
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}
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break;
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case 0:
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if (left != NULL) {
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int i=copyLen;
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while(i > 0) {
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convMacro(left,dtemp,tmp);
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data[len++]=(short int)tmp;
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i--;
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// right channel empty
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len++;
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}
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}
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if (right != NULL) {
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int i=copyLen;
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len=len-destSize;
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while(i > 0) {
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// select right channel
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len++;
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convMacro(right,dtemp,tmp);
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data[len++]=(short int)tmp;
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i--;
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// left channel already copied
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}
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}
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default:
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/*cout << "unknown stereo value in pcmFrame"<<endl;
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exit(0);*/
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break;
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}
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}
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void PCMFrame::putFloatData(float* in,int lenCopy) {
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/*if ((len+lenCopy) > size) {
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cout << "cannot copy putFloatData. Does not fit"<<endl;
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exit(0);
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}*/
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double dtemp;
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int tmp;
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while(lenCopy > 0) {
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convMacro(in,dtemp,tmp);
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data[len++]=(short int)tmp;
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lenCopy--;
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}
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}
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void PCMFrame::putInt16Data(short* pData,int nLength)
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{
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memcpy(data,pData,nLength*sizeof(short));
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len=nLength;
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}
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void PCMFrame::putSilence(int nLength)
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{
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memset(data,0,nLength*sizeof(short));
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len=nLength;
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}
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