General Description

This section describes A2DP MPEG-D,USAC Audio codec API.

Data Structures
struct	wiced_bt_a2d_mdu_cie_t
	data type for the MPEG-2, 4 AAC Codec Information Element More...

Macros
#define	A2D_MDU_INFO_LEN 9
	the LOSC of MPEG_D, USAC media codec capabilitiy

#define	A2D_MDU_IE_VBR_MSK 0x80
	b7: VBR (octet 4)

Functions
wiced_bt_a2d_status_t	wiced_bt_a2d_bld_mdu_info (uint8_t media_type, wiced_bt_a2d_mdu_cie_t p_ie, uint8_t p_result)
	This function is called by an application to build the MPEG-2, 4 AAC Media Codec Capabilities byte sequence beginning from the LOSC octet. More...

wiced_bt_a2d_status_t	wiced_bt_a2d_pars_mdu_info (wiced_bt_a2d_mdu_cie_t p_ie, uint8_t p_info, wiced_bool_t for_caps)
	This function is called by an application to parse the MPEG-2, 4 AAC Media Codec Capabilities byte sequence beginning from the LOSC octet. More...

MPEG-D,USAC Object
for Codec Specific Information Element
#define	A2D_MDU_IE_OBJ_MSK 0xC0
	b7-b6 object type

#define	A2D_MDU_IE_OBJ_USAC 0x80
	b7: MPEG-D USAC WITH MPEG-D DRC

MPEG-D USAC Sampling Frequency

#define	A2D_MDU_IE_SAMP_FREQ_MSK 0x3FFFFFF0
	sampling frequency Full

#define	A2D_MDU_IE_SAMP_FREQ0_MSK 0x3F000000
	sampling frequency Mask (octet 0)

#define	A2D_MDU_IE_SAMP_FREQ12_MSK 0x00FFFF00
	sampling frequency (octet 1/2)

#define	A2D_MDU_IE_SAMP_FREQ3_MSK 0x000000F0
	sampling frequency (octet 3)

#define	A2D_MDU_IE_SAMP_FREQ_7 0x20000000
	b5:octet0 7350 Hz

#define	A2D_MDU_IE_SAMP_FREQ_80 0x10000000
	b4:octet0 8000 Hz

#define	A2D_MDU_IE_SAMP_FREQ_8 0x08000000
	b3:octet0 8820 Hz

#define	A2D_MDU_IE_SAMP_FREQ_9 0x04000000
	b2:octet0 9600 Hz

#define	A2D_MDU_IE_SAMP_FREQ_11 0x02000000
	b1:octet0 11025Hz

#define	A2D_MDU_IE_SAMP_FREQ_117 0x01000000
	b0:octet0 11760Hz

#define	A2D_MDU_IE_SAMP_FREQ_12 0x00800000
	b7:octet1 12kHz

#define	A2D_MDU_IE_SAMP_FREQ_128 0x00400000
	b6:octet1 12.8kHz

#define	A2D_MDU_IE_SAMP_FREQ_14 0x00200000
	b5:octet1 14.7kHz

#define	A2D_MDU_IE_SAMP_FREQ_16 0x00100000
	b4:octet1 16kHz

#define	A2D_MDU_IE_SAMP_FREQ_17 0x00080000
	b3:octet1 17640Hz

#define	A2D_MDU_IE_SAMP_FREQ_19 0x00040000
	b2:octet1 19.2kHz

#define	A2D_MDU_IE_SAMP_FREQ_22 0x00020000
	b1:octet1 22.05kHz

#define	A2D_MDU_IE_SAMP_FREQ_24 0x00010000
	b0:octet1 24kHz

#define	A2D_MDU_IE_SAMP_FREQ_29 0x00008000
	b7:octet2 29.4kHz

#define	A2D_MDU_IE_SAMP_FREQ_32 0x00004000
	b6:octet2 32kHz

#define	A2D_MDU_IE_SAMP_FREQ_35 0x00002000
	b5:octet2 35.28kHz

#define	A2D_MDU_IE_SAMP_FREQ_38 0x00001000
	b4:octet2 38.4kHz

#define	A2D_MDU_IE_SAMP_FREQ_44 0x00000800
	b3:octet2 44.1kHz

#define	A2D_MDU_IE_SAMP_FREQ_48 0x00000400
	b2:octet2 48kHz

#define	A2D_MDU_IE_SAMP_FREQ_58 0x00000200
	b1:octet2 58.8kHz

#define	A2D_MDU_IE_SAMP_FREQ_64 0x00000100
	b0:octet2 64kHz

#define	A2D_MDU_IE_SAMP_FREQ_70 0x00000080
	b7:octet3 70.56kHz

#define	A2D_MDU_IE_SAMP_FREQ_76 0x00000040
	b6:octet3 76.8kHz

#define	A2D_MDU_IE_SAMP_FREQ_88 0x00000020
	b5:octet3 88.2kHz

#define	A2D_MDU_IE_SAMP_FREQ_96 0x00000010
	b4:octet3 96kHz

MPEG-D USAC Channel

#define	A2D_MDU_IE_CHNL_MSK 0x0F
	b3-b0 channels (octet 3)

#define	A2D_MDU_IE_CHNL_1 0x08
	b3: 1 channel

#define	A2D_MDU_IE_CHNL_2 0x04
	b2: 2 channels

MPEG-D USAC Bitrate

#define	A2D_MDU_IE_BITRATE4_MSK 0x7F0000
	octect 4

#define	A2D_MDU_IE_BITRATE56_MSK 0x00FFFF
	octect5, 6

#define	A2D_MDU_IE_BITRATE_MSK 0x7FFFFF
	b6-b0 of octect 4, all of octect5, 6

Function Documentation

◆ wiced_bt_a2d_bld_mdu_info()

wiced_bt_a2d_status_t wiced_bt_a2d_bld_mdu_info	(	uint8_t	media_type,
		wiced_bt_a2d_mdu_cie_t *	p_ie,
		uint8_t *	p_result
	)

This function is called by an application to build the MPEG-2, 4 AAC Media Codec Capabilities byte sequence beginning from the LOSC octet.

Parameters

[in]	media_type	: Indicates Audio, or Multimedia.
[in]	p_ie	: MPEG-2, 4 AAC Codec Information Element information.
[out]	p_result	: the resulting codec info byte sequence.

Returns: A2D_SUCCESS if function execution succeeded.
Error status code , otherwise.

◆ wiced_bt_a2d_pars_mdu_info()

wiced_bt_a2d_status_t wiced_bt_a2d_pars_mdu_info	(	wiced_bt_a2d_mdu_cie_t *	p_ie,
		uint8_t *	p_info,
		wiced_bool_t	for_caps
	)

This function is called by an application to parse the MPEG-2, 4 AAC Media Codec Capabilities byte sequence beginning from the LOSC octet.

Parameters

[in]	p_info	: the byte sequence to parse.
[in]	for_caps	: TRUE, if the byte sequence is for get capabilities response.
[out]	p_ie	: MPEG-2, 4 AAC Codec Information Element information.

Returns: A2D_SUCCESS if function execution succeeded.
Error status code , otherwise.

General Description

Data Structures

Macros

Functions

MPEG-D,USAC Object

MPEG-D USAC Sampling Frequency

MPEG-D USAC Channel

MPEG-D USAC Bitrate

Function Documentation

◆ wiced_bt_a2d_bld_mdu_info()

◆ wiced_bt_a2d_pars_mdu_info()