Really add the iLBC files into SVN now (duh!).

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@638 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 72 insertions, 0 deletions

diff --git a/pjmedia/src/pjmedia-codec/ilbc/anaFilter.c b/pjmedia/src/pjmedia-codec/ilbc/anaFilter.c
new file mode 100644
index 00000000..c161f98a
--- /dev/null
+++ b/pjmedia/src/pjmedia-codec/ilbc/anaFilter.c
@@ -0,0 +1,72 @@
+
+   /******************************************************************
+
+       iLBC Speech Coder ANSI-C Source Code
+
+       anaFilter.c
+
+       Copyright (C) The Internet Society (2004).
+       All Rights Reserved.
+
+   ******************************************************************/
+
+   #include <string.h>
+   #include "iLBC_define.h"
+
+   /*----------------------------------------------------------------*
+    *  LP analysis filter.
+    *---------------------------------------------------------------*/
+
+   void anaFilter(
+       float *In,  /* (i) Signal to be filtered */
+       float *a,   /* (i) LP parameters */
+       int len,/* (i) Length of signal */
+       float *Out, /* (o) Filtered signal */
+       float *mem  /* (i/o) Filter state */
+   ){
+       int i, j;
+       float *po, *pi, *pm, *pa;
+
+       po = Out;
+
+       /* Filter first part using memory from past */
+
+       for (i=0; i<LPC_FILTERORDER; i++) {
+           pi = &In[i];
+           pm = &mem[LPC_FILTERORDER-1];
+           pa = a;
+           *po=0.0;
+
+
+
+
+
+           for (j=0; j<=i; j++) {
+               *po+=(*pa++)*(*pi--);
+           }
+           for (j=i+1; j<LPC_FILTERORDER+1; j++) {
+
+               *po+=(*pa++)*(*pm--);
+           }
+           po++;
+       }
+
+       /* Filter last part where the state is entirely
+          in the input vector */
+
+       for (i=LPC_FILTERORDER; i<len; i++) {
+           pi = &In[i];
+           pa = a;
+           *po=0.0;
+           for (j=0; j<LPC_FILTERORDER+1; j++) {
+               *po+=(*pa++)*(*pi--);
+           }
+           po++;
+       }
+
+       /* Update state vector */
+
+       memcpy(mem, &In[len-LPC_FILTERORDER],
+           LPC_FILTERORDER*sizeof(float));
+   }
+