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source / CODEC

CODEC_autoscanHdl.c File Reference

Detailed Description

This module provide Codec PCM handles for autoscan mode.

REVISION

Definition in file CODEC_autoscanHdl.c.

#include "../SYSTEM/sys_hardware.h"
#include "codec.h"
#include "codec_assert.h"
#include "../AUDIO/audio.h"
#include "../TUNER/tuner.h"
#include "../FMXMIT/xmit_inc.h"
#include "../AUTOSCAN/autoscan.h"

Include dependency graph for CODEC_autoscanHdl.c:

Include dependency graph

Go to the source code of this file.

Functions

void CODEC_autoscanPcmPut (int *pcmBuf, int len)
 Function serves as the autoscan PCM data put handle.
void CODEC_autoscanPcmGet (int *pcmBuf, int len)
 Function serves as the autoscan PCM data get handle.

Function Documentation

void CODEC_autoscanPcmGet (  int *  pcmBuf,
int  len
) 
 

Function serves as the autoscan PCM data get handle.

Parameters:
pcmBuf PCM data buffer.
len Available PCM data length in words.

Definition at line 87 of file CODEC_autoscanHdl.c.

00088 {
00089     leftChannel  = pcmBuf;
00090     rightChannel = pcmBuf + len/2;
00091 }

void CODEC_autoscanPcmPut (  int *  pcmBuf,
int  len
) 
 

Function serves as the autoscan PCM data put handle.

Parameters:
pcmBuf PCM data buffer.
len Pending PCM data length in words.

Definition at line 48 of file CODEC_autoscanHdl.c.

References st_AUTOSCAN::pLeftInput, and st_AUTOSCAN::pRightInput.

00049 {
00050     unsigned int i;
00051     int *        pSrcLeft;
00052     int *        pSrcRight;
00053     int *        pDstLeft;
00054     int *        pDstRight;
00055     int          dataLen = len/2;
00056     
00057     pSrcLeft  = leftChannel;
00058     pSrcRight = rightChannel;
00059     pDstLeft  = pcmBuf;
00060     pDstRight = pcmBuf + dataLen;
00061     
00062     AutoscanGlobals.pLeftInput = pDstLeft;
00063     AutoscanGlobals.pRightInput = pDstRight;
00064 
00065     for (i = 0; i < dataLen; i++)
00066     {
00067         FIRDeemphasisLeftTaps[0] = *pSrcLeft++;
00068         FIRDeemphasisRightTaps[0] = *pSrcRight++;
00069     
00070         // apply demphasis filter
00071         *pDstLeft++  = TUNER_deemphasisFIR(&FIRDeemphasisLeft);
00072         *pDstRight++ = TUNER_deemphasisFIR(&FIRDeemphasisRight);
00073     }
00074     
00075     AUTOSCAN_genMetrics(&AutoscanGlobals);
00076 }

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