g711playbacksi3000_main.c

G711在dsPIC33FJ256GP506下的应用

/*********************************************************************
*                                                                    *
*                       Software License Agreement                   *
*                                                                    *
*   The software supplied herewith by Microchip Technology           *
*   Incorporated (the "Company") for its dsPIC controller            *
*   is intended and supplied to you, the Company's customer,         *
*   for use solely and exclusively on Microchip dsPIC                *
*   products. The software is owned by the Company and/or its        *
*   supplier, and is protected under applicable copyright laws. All  *
*   rights are reserved. Any use in violation of the foregoing       *
*   restrictions may subject the user to criminal sanctions under    *
*   applicable laws, as well as to civil liability for the breach of *
*   the terms and conditions of this license.                        *
*                                                                    *
*   THIS SOFTWARE IS PROVIDED IN AN "AS IS" CONDITION.  NO           *
*   WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING,    *
*   BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND    *
*   FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE     *
*   COMPANY SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL,  *
*   INCIDENTAL OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.  *
*                                                                    *
*********************************************************************/

#include <p33Fxxxx.h>
#include "G711Lib_common.h"
#include "G711Lib_si3000.h"

_FOSCSEL(FNOSC_PRIPLL);
_FOSC(FCKSM_CSDCMD & OSCIOFNC_OFF & POSCMD_EC);
_FWDT(FWDTEN_OFF);

//-----------------------------------------------------------------------------
//Global Variables
//-----------------------------------------------------------------------------
//User defined ping pong Buffers
short expandbuffer1[NUMOFSAMPLESPERBLOCK];  	//sampleExpIpBuffer
short expandbuffer2[NUMOFSAMPLESPERBLOCK];		//sampleExpOpBuffer
short buffer11[NUMOFSAMPLESPERBLOCK];   		//sampleComprsIpBuffer.
short buffer12[NUMOFSAMPLESPERBLOCK];			//sampleComprsOpBuffer.
long slen = NUMOFSAMPLESPERBLOCK;
short  *temp;

//-----------------------------------------------------------------------------
//Macro Instantiation
//-----------------------------------------------------------------------------
G711SI3000INIT                     //Macro to instantiate SI3000 structure
CODECSETUP                         //Macro to instantiate CODECSETUP structure

//-----------------------------------------------------------------------------
//External Variables
//-----------------------------------------------------------------------------
extern char libTblByteRead ( );
extern void libTblPtrSet ( char x );

/******************************************************************************
**
**  Function Name: G711PlaybackSI3000_Main ( ) 
**
**  Description:  Wrapper.
**
******************************************************************************/
int main ( void )
{
  /* PLLFBD: Oscillator PLL Divisor Control Register set for 12.288 Mhz*/
  CLKDIV = 0x00C0;
  PLLFBD = 62;                                //Fcy = Fosc/2;

  libSi3000Init ( );                     //Initialize Si3000 and DCI registers.
  libSi3000StartSampling ( expandbuffer1, expandbuffer2, buffer11, buffer12 );

  /* Set up the pointer to program memory encoded speech sample table. */
  libTblPtrSet ( 1 );
  libarrayFillDecoderInputPM ( );

/*****************************************************************************
                         A Law companding
*****************************************************************************/

  if ( codecdata.law == 1 ) 
  {
    while ( 1 )
    {
      if( codecdata.fBlockdone != 0x01 && codecdata.fBlockplayed == 0x01
           && codecdata.sampleCount <= codecdata.arraysizeinbytes )
	  {
        /*Load first Compressed speech datablock to encoded speech pingpong
          buffer.*/
        libarrayFillDecoderInputPM ( );
      }

      if ( codecdata.fBlockdone == 0x01 )
	  {
        /* Start alaw expansion. */
        alaw_expand( slen, codecdata.sampleComprsOpBuffer, \
                                     codecdata.sampleExpandIpBuffer );
        libStartPlay ( );

        while( codecdata.fBlockplayed != 0x00 );

	    libBufManagerDecoder ( );         //Expander Buffer Management
      }

      /* Check if the total number of Blocks specified by #define 
         ARRAYSIZEINBYTES in G711Lib_common.h have been played. */
      if ( ( codecdata.sampleCount  >= codecdata.arraysizeinbytes ) 
                  && ( codecdata.fBlockplayed == 0x00 ) )
      {
        /*Reset flags.*/
        libSi3000StopSampling ( );
        codecdata.fStartPlay   = 0x00;
        codecdata.fBlockdone   = 0x00;       
        codecdata.blockCount   = 0x0000;
        codecdata.sampleCount  = 0x00000000;
        codecdata.fBlockplayed = 0x00;
        break;
      }
    }
  }
/************************End of A Law companding******************************/


/*****************************************************************************
                         u Law companding
*****************************************************************************/

  else
  {
    while ( 1 )
    {
      if( codecdata.fBlockdone != 0x01 && codecdata.fBlockplayed == 0x01
           && codecdata.sampleCount <= codecdata.arraysizeinbytes )
	  {
         /*Load first Compressed speech datablock to encoded speech pingpong
           buffer.*/
         libarrayFillDecoderInputPM ( );
      }

      if ( codecdata.fBlockdone == 0x01 )
	  {
        /* Start ulaw expansion. */
        ulaw_expand( slen, codecdata.sampleComprsOpBuffer, \
                                     codecdata.sampleExpandIpBuffer );
        libStartPlay ( );

        while( codecdata.fBlockplayed != 0x00 );

        libBufManagerDecoder ( );          //Expander Buffer Management
      }

      /* Check if the total number of Blocks specified by #define
         ARRAYSIZEINBYTES in G711Lib_common.h have been played. */
      if ( ( codecdata.sampleCount  >= codecdata.arraysizeinbytes ) 
                   && ( codecdata.fBlockplayed == 0x00 ) )
      {
        /*Reset flags.*/
        libSi3000StopSampling ( );
        codecdata.fStartPlay   = 0x00;
        codecdata.fBlockdone   = 0x00;       
        codecdata.blockCount   = 0x0000;
        codecdata.sampleCount  = 0x00000000;
        codecdata.fBlockplayed = 0x00;
        break;
      }
    }
  }
  while( 1 );  
}
/************************End of u Law companding******************************/

/*-----------------------------------------------------------------------------
               END OF FILE: G711PlaybackSI3000_Main.c 
-----------------------------------------------------------------------------*/