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/*****************************************************************************
**
** Name: a2d_m24.h
**
** Description:Interface to MPEG-2, 4 Aac
**
** Copyright (c) 2000-2004, WIDCOMM Inc., All Rights Reserved.
** WIDCOMM Bluetooth Core. Proprietary and confidential.
**
*****************************************************************************/
#ifndef A2D_M24_H
#define A2D_M24_H
/*****************************************************************************
** Constants
*****************************************************************************/
/* the LOSC of MPEG_2, 4 AAC media codec capabilitiy */
#define A2D_M24_INFO_LEN 8
/* for Codec Specific Information Element */
#define A2D_M24_IE_OBJ_MSK 0xF0 /* b7-b4 object type. b3-b0 is RFA,not used */
#define A2D_M24_IE_OBJ_2LC 0x80 /* b7: MPEG-2 AAC LC */
#define A2D_M24_IE_OBJ_4LC 0x40 /* b6: MPEG-4 AAC LC */
#define A2D_M24_IE_OBJ_4LTP 0x20 /* b5: MPEG-4 AAC LTP */
#define A2D_M24_IE_OBJ_4S 0x10 /* b4: MPEG-4 AAC scalable */
#define A2D_M24_IE_SAMP_FREQ_MSK 0xFFF0 /* sampling frequency */
#define A2D_M24_IE_SAMP_FREQ_8 0x8000 /* b7:8 kHz */
#define A2D_M24_IE_SAMP_FREQ_11 0x4000 /* b6:11 kHz */
#define A2D_M24_IE_SAMP_FREQ_12 0x2000 /* b5:12 kHz */
#define A2D_M24_IE_SAMP_FREQ_16 0x1000 /* b4:16 kHz */
#define A2D_M24_IE_SAMP_FREQ_22 0x0800 /* b3:22.05kHz */
#define A2D_M24_IE_SAMP_FREQ_24 0x0400 /* b2:24 kHz */
#define A2D_M24_IE_SAMP_FREQ_32 0x0200 /* b1:32 kHz */
#define A2D_M24_IE_SAMP_FREQ_44 0x0100 /* b0:44.1kHz */
#define A2D_M24_IE_SAMP_FREQ_48 0x0080 /* b7:48 kHz */
#define A2D_M24_IE_SAMP_FREQ_64 0x0040 /* b6:64 kHz */
#define A2D_M24_IE_SAMP_FREQ_88 0x0020 /* b5:88 kHz */
#define A2D_M24_IE_SAMP_FREQ_96 0x0010 /* b4:96 kHz */
#define A2D_M24_IE_CHNL_MSK 0x0C /* b3-b2 channels */
#define A2D_M24_IE_CHNL_1 0x08 /* b3: 1 channel */
#define A2D_M24_IE_CHNL_2 0x04 /* b2: 2 channels */
#define A2D_M24_IE_VBR_MSK 0x80 /* b7: VBR */
#define A2D_M24_IE_BITRATE3_MSK 0x7F0000 /* octect3*/
#define A2D_M24_IE_BITRATE45_MSK 0x00FFFF /* octect4, 5*/
#define A2D_M24_IE_BITRATE_MSK 0x7FFFFF /* b7-b0 of octect 3, all of octect4, 5*/
/*****************************************************************************
** Type Definitions
*****************************************************************************/
/* data type for the MPEG-2, 4 AAC Codec Information Element*/
typedef struct
{
UINT8 obj_type; /* Object type */
UINT16 samp_freq; /* Sampling frequency */
UINT8 chnl; /* Channel mode */
BOOLEAN vbr; /* Variable Bit Rate */
UINT32 bitrate; /* Bit rate index */
} tA2D_M24_CIE;
/*****************************************************************************
** External Function Declarations
*****************************************************************************/
#ifdef __cplusplus
extern "C"
{
#endif
/******************************************************************************
**
** Function A2D_BldM24Info
**
** Description This function is called by an application to build
** the MPEG-2, 4 AAC Media Codec Capabilities byte sequence
** beginning from the LOSC octet.
** Input Parameters:
** media_type: Indicates Audio, or Multimedia.
**
** p_ie: MPEG-2, 4 AAC Codec Information Element information.
**
** Output Parameters:
** p_result: the resulting codec info byte sequence.
**
** Returns A2D_SUCCESS if function execution succeeded.
** Error status code, otherwise.
******************************************************************************/
A2D_API extern tA2D_STATUS A2D_BldM24Info(UINT8 media_type, tA2D_M24_CIE *p_ie,
UINT8 *p_result);
/******************************************************************************
**
** Function A2D_ParsM24Info
**
** Description This function is called by an application to parse
** the MPEG-2, 4 AAC Media Codec Capabilities byte sequence
** beginning from the LOSC octet.
** Input Parameters:
** p_info: the byte sequence to parse.
**
** for_caps: TRUE, if the byte sequence is for get
** capabilities response.
**
** Output Parameters:
** p_ie: MPEG-2, 4 AAC Codec Information Element information.
**
** Returns A2D_SUCCESS if function execution succeeded.
** Error status code, otherwise.
******************************************************************************/
A2D_API extern tA2D_STATUS A2D_ParsM24Info(tA2D_M24_CIE *p_ie, UINT8 *p_info,
BOOLEAN for_caps);
#ifdef __cplusplus
}
#endif
#endif /* A2D_M24_H */
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