1 files changed, 140 insertions, 0 deletions
diff --git a/mpeglib/lib/frame/pcmFrame.cpp b/mpeglib/lib/frame/pcmFrame.cpp
new file mode 100644
index 00000000..24ab9792
--- /dev/null
+++ b/mpeglib/lib/frame/pcmFrame.cpp
@@ -0,0 +1,140 @@
+/*
+  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--;
+  }
+
+}
+
+
+