g729ab_codec.h

IP04是一个使用Blackfin开源硬件结合Asterisk开源软件建立的IPPBX系统.

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******************************************************************************

Project:	G.729 for Blackfin
Title:		G.729 decoder state buffer structure and function prototype
Author(s):	E. HSU
Revised by:     David Rowe October 2006, changed threading model to improve
                efficiency

Description: Main G.729AB codec header file

*****************************************************************************/
#ifndef G729AB_CODEC_H
#define G729AB_CODEC_H


#if defined(G729_MULTI_INST)
#include <pthread.h>
#include <errno.h>

static pthread_mutex_t g729_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif

#define DEC_ERROR_HANDLER 		1
#define G729_DEC_ERROR	 		2
#define G729_DEC_VERSION 		3
#define G729_DEC_INPUTFORMAT		4
#define G729_DEC_VERSION_NO		0x0140

typedef struct DECINST {
		short DecoderBuffer[893]; 
		short Input_Format;   		
  		void (* ErrorHandler)(void);
    	int		errorcode;    	
} G729_DecObj;

typedef G729_DecObj * G729_dec_h;

/* Function ptrs for g729 library functions so we can support dlopen() 
   with .so version.  These need to be initialised before lib is used,
   in both flat and .so versions */
void (*g729ab_dec_reset)(G729_dec_h svptr);
void (*g729ab_dec_process)(G729_dec_h svptr, short *data_ptr, short *pcm_ptr);

/*
**
** Function:            G729AB_DEC_PROCESS()
**
** Description:         Encoder Processing routine.
** Arguments:
**  svptr		Instance handle.
**  data_ptr   		Pointer pointing to the index input data.
**  pcm_ptr    		Pointer pointing to the PCM speech output data.
** Outputs:             The results of processing are stored in the memory
**			location pointed to by pcm_ptr.
** Return value:        Returns 1.
**
*/
void G729AB_DEC_PROCESS(G729_dec_h svptr, short *data_ptr, short *pcm_ptr);
void G729AB_DEC(G729_dec_h svptr, short *data_ptr, short *pcm_ptr);
void G729AB_DEC(G729_dec_h svptr, short *data_ptr, short *pcm_ptr)
{
#if defined(G729_MULTI_INST)
	pthread_mutex_lock(&g729_mutex);
#endif
	(*g729ab_dec_process)(svptr, data_ptr, pcm_ptr);
#if defined(G729_MULTI_INST)
	pthread_mutex_unlock(&g729_mutex);	
#endif	
};

/*
**
** Function:            G729_DEC_RESET()
**
** Description:         Resets the member variables within the given instance
**                      to their default values.
** Arguments:
**  svptr		Handle to the instance that is to be reset.
** Outputs:             None.
** Return value:        Returns 1.
**
*/
void G729AB_DEC_RESET(G729_dec_h svptr);

/*
**
** Function:            G729AB_DEC_CONFIG()
** Description:         Configure the given instance with the given
**                      configuration values.
** Arguments:
**  svptr		Instance handle.
**  Enum		Item to be configured.
**  value		Configuration value for the specified item.
** Outputs:             The specified item is configured with the value specified
** Return value:        Returns 1 if configuration successful, 0 otherwise.
*/

static inline int G729AB_DEC_CONFIG (G729_dec_h svptr,int Enum,int value) {
    switch(Enum) {
        case G729_DEC_INPUTFORMAT:	svptr->Input_Format=(short) value;  return 1;		
        case DEC_ERROR_HANDLER: svptr->ErrorHandler=(void (*)(void)) value; return 1;        
        default: return 0;
    }
}

/*
**
** Function:            G729AB_DEC_STATUS()
** Description:         Returns the required status from the given instance.
** Arguments:
**  svptr     		The handle to the instance.
**  Enum		Status item to return.
** Outputs:             None.
** Return value:        Returns value for specified item.
*/

static inline int G729AB_DEC_STATUS(G729_dec_h svptr, unsigned Enum) {
    switch(Enum) {
        case G729_DEC_ERROR:   return svptr->errorcode;
        case G729_DEC_VERSION: return G729_DEC_VERSION_NO;
        default:               return 0;
    }
}

/*****************************************************************************/

#define G729_ENC_VERSION_NO 	0x0140

#define ENC_ERROR_HANDLER 		1
#define G729_ENC_ERROR	 		2
#define G729_ENC_VERSION 		3
#define G729_ENC_VAD	 		4
#define G729_ENC_OUTPUTFORMAT	5

#define _Vad_enable_offset		2108


typedef struct {
  	short CoderBuffer[1054];  	
  	short Vad_enable;    
   	short extra;
   	int output_format;
  	void (* ErrorHandler)(void);
    int	errorcode;    
} G729_EncObj;

typedef G729_EncObj * G729_enc_h;

/* Function ptrs for g729 library functions so we can support dlopen() 
   with .so version.  These need to be initialised before lib is used,
   in both flat and .so versions */
void (*g729ab_enc_reset)(G729_enc_h svptr);
void (*g729ab_enc_process)(G729_enc_h svptr, short *pcm_ptr, short *data_ptr);

/*
**
** Function:            G729AB_ENC_PROCESS()
** Description:         Encoder Processing routine.
** Arguments:
**  svptr		Instance handle.
**  pcm_ptr     	Pointer pointing to the PCM speech input data.
**  data_ptr     	Pointer pointing to the index output data.
** Outputs:             The results of processing are stored in the memory
**			location pointed to by data_ptr.
** Return value:        None.
**
*/
void G729AB_ENC_PROCESS(G729_enc_h svptr, short * pcm_ptr, short * data_ptr);
void G729AB_ENC(G729_enc_h svptr, short * pcm_ptr, short * data_ptr);
void G729AB_ENC(G729_enc_h svptr, short * pcm_ptr, short * data_ptr)
{
#if defined(G729_MULTI_INST)
	pthread_mutex_lock(&g729_mutex);
#endif
        (*g729ab_enc_process)(svptr, pcm_ptr, data_ptr);
#if defined(G729_MULTI_INST)
        pthread_mutex_unlock(&g729_mutex);
#endif
}

/*
** Function:            G729AB_ENC_RESET()
** Description:         Resets the member variables within the given instance
**                      to their default values.
** Arguments:
**   svptr 		Handle to the instance that is to be reset.
** Outputs:             None.
** Return value:        None.
*/
void G729AB_ENC_RESET(G729_enc_h svptr);

/*
** Function:            G729_ENC_CONFIG()
** Description:         Configure the given instance with the given
**                      configuration values.
** Arguments:
**  svptr	   	The handle to the instance that is to be configured.
**  Enum		Item to configure.
**  value		Configuration value.
** Outputs:             None.
** Return value:        Returns 1 if configuration successful, 0 otherwise.
*/

static inline int G729AB_ENC_CONFIG(G729_enc_h  svptr, unsigned Enum, unsigned value)
{
    switch(Enum) {
		case G729_ENC_VAD: 	    svptr->Vad_enable=(short)  value;	return 1;
		case ENC_ERROR_HANDLER: svptr->ErrorHandler=(void (*)(void)) value; return 1;  
		case G729_ENC_OUTPUTFORMAT: 		 svptr->output_format =  value;	return 1;			
        default: return 0;
    }
}

/*
** Function:            G729AB_ENC_STATUS()
** Description:         Returns the required status from the given instance.
** Arguments:
**  svptr	  	The handle to the instance.
**  Enum		Status item to return.
** Outputs:             None.
** Return value:        Returns the requested status value.
*/

static inline int G729AB_ENC_STATUS(G729_enc_h svptr, unsigned Enum)
{
    switch(Enum)    {
        case G729_ENC_ERROR:        return svptr->errorcode;
        case G729_ENC_VERSION:     	return G729_ENC_VERSION_NO;
        default:            return 0;
    }
}

#endif /* #ifndef G729AB_CODEC_H */