aud_dsp_am_reply.cc

Motorola synergy audio component

/* (c) Copyright Motorola 1998, All rights reserved.        
   Motorola Confidential Proprietary
   Contains confidential proprietary information of Motorola, Inc.
   Reverse engineering is prohibited.
   The copyright notice does not imply publication.
  
   DESCRIPTION: 
      <file description>
  
 *************** REVISION HISTORY *********************************************
  
   Date       Author      Reference
   ========   ========    ==========================
   00-08-09   mtaraba     CR - CSGce55882
              Eliminate file gsm.h from audio manager

   00-04-05   hchuang     CR - CSGce53807
              Update Audio Manager to use HAPI MDI functions and header files
			  - remove #define api_queue since it's defined in AUD_DSP_AM_Reply.H

   99-12-14   ktang       CR - CSGce42434
              Common Tone Generator
              - File creation
              - Modified function parse_primitive, and moved it in from .H
  
*/
/************** INCLUDES ******************************************************/
#include <SUAPI/suapi.h>
#include <audio/AUD_DSP_AM_Reply.H>

/************** LOCAL CONSTANTS ***********************************************/

/************** LOCAL STRUCTURES, ENUMS, AND TYPEDEFS *************************/

/************** LOCAL FUNCTION PROTOTYPES *************************************/

/************** LOCAL MACROS **************************************************/

/************** LOCAL VARIABLES ***********************************************/

/************** FUNCTION DEFINITIONS ******************************************/

/* DESCRIPTION:
       Constructor
 
   INPUTS:
       Received primitive body

   OUTPUTS:
       None

   IMPORTANT NOTES:
       None
     
*/
AUD_DSP_Reply_RX :: AUD_DSP_Reply_RX(void *msg)
{
    msg_id = TD_DSP_AUD_REPLY_BUFF_INVALID;
    next_msg_pos = (AUD_DSP_REPLY_WORD*)msg;
    primitive_data_ptr = msg;
}

/* DESCRIPTION:
       This function moves the pointer primitive_data_ptr to the next message
   body in the primitive body. As definition here, a primitve contains 0 to 
   multiple messages in its body; where each message contains a message header
   and a message body. Refer MDI documents for message formats.
 
   INPUTS:
       None

   OUTPUTS:
       TRUE - if there is such one in the primitive body
       FALSE - if there is no (more) messages in the primitive body

   IMPORTANT NOTES:
       After parsing, primitive_data_ptr points to the body of the message,
   not the header.
*/


BOOL AUD_DSP_Reply_RX :: parse_message(void)
{
    BOOL stat = FALSE;
    msg_id = *next_msg_pos;

    // The boundry checking protection assumes that when the messages are written
    // to MDI, if there is no enough room for the whole next message to be written,
    // this next message is not to be written
    if (msg_id != TD_DSP_AUD_REPLY_BUFF_INVALID && (next_msg_pos - (UINT16*)primitive_data_ptr) < DSP_MCU_AUDIO_REPLY_WORD_SIZE)
    {
        UINT8 msg_len = AUD_DSP_REPLY_get_msg_len(next_msg_pos[AUD_DSP_REPLY_MSG_LEN_INDEX]);

        primitive_data_ptr = next_msg_pos;
        next_msg_pos += msg_len + AUD_DSP_REPLY_MSG_HEADER_LEN;
        stat = TRUE;
    }

    return stat;
}