summaryrefslogtreecommitdiffstats
path: root/stack/include/a2d_sbc.h
diff options
context:
space:
mode:
Diffstat (limited to 'stack/include/a2d_sbc.h')
-rw-r--r--stack/include/a2d_sbc.h212
1 files changed, 212 insertions, 0 deletions
diff --git a/stack/include/a2d_sbc.h b/stack/include/a2d_sbc.h
new file mode 100644
index 0000000..dad0b8b
--- /dev/null
+++ b/stack/include/a2d_sbc.h
@@ -0,0 +1,212 @@
+/******************************************************************************
+ *
+ * Copyright (C) 2000-2012 Broadcom Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ * nterface to low complexity subband codec (SBC)
+ *
+ ******************************************************************************/
+#ifndef A2D_SBC_H
+#define A2D_SBC_H
+
+/*****************************************************************************
+** Constants
+*****************************************************************************/
+/* the length of the SBC Media Payload header. */
+#define A2D_SBC_MPL_HDR_LEN 1
+
+/* the LOSC of SBC media codec capabilitiy */
+#define A2D_SBC_INFO_LEN 6
+
+/* for Codec Specific Information Element */
+#define A2D_SBC_IE_SAMP_FREQ_MSK 0xF0 /* b7-b4 sampling frequency */
+#define A2D_SBC_IE_SAMP_FREQ_16 0x80 /* b7:16 kHz */
+#define A2D_SBC_IE_SAMP_FREQ_32 0x40 /* b6:32 kHz */
+#define A2D_SBC_IE_SAMP_FREQ_44 0x20 /* b5:44.1kHz */
+#define A2D_SBC_IE_SAMP_FREQ_48 0x10 /* b4:48 kHz */
+
+#define A2D_SBC_IE_CH_MD_MSK 0x0F /* b3-b0 channel mode */
+#define A2D_SBC_IE_CH_MD_MONO 0x08 /* b3: mono */
+#define A2D_SBC_IE_CH_MD_DUAL 0x04 /* b2: dual */
+#define A2D_SBC_IE_CH_MD_STEREO 0x02 /* b1: stereo */
+#define A2D_SBC_IE_CH_MD_JOINT 0x01 /* b0: joint stereo */
+
+#define A2D_SBC_IE_BLOCKS_MSK 0xF0 /* b7-b4 number of blocks */
+#define A2D_SBC_IE_BLOCKS_4 0x80 /* 4 blocks */
+#define A2D_SBC_IE_BLOCKS_8 0x40 /* 8 blocks */
+#define A2D_SBC_IE_BLOCKS_12 0x20 /* 12blocks */
+#define A2D_SBC_IE_BLOCKS_16 0x10 /* 16blocks */
+
+#define A2D_SBC_IE_SUBBAND_MSK 0x0C /* b3-b2 number of subbands */
+#define A2D_SBC_IE_SUBBAND_4 0x08 /* b3: 4 */
+#define A2D_SBC_IE_SUBBAND_8 0x04 /* b2: 8 */
+
+#define A2D_SBC_IE_ALLOC_MD_MSK 0x03 /* b1-b0 allocation mode */
+#define A2D_SBC_IE_ALLOC_MD_S 0x02 /* b1: SNR */
+#define A2D_SBC_IE_ALLOC_MD_L 0x01 /* b0: loundess */
+
+#define A2D_SBC_IE_MIN_BITPOOL 2
+#define A2D_SBC_IE_MAX_BITPOOL 250
+
+/* for media payload header */
+#define A2D_SBC_HDR_F_MSK 0x80
+#define A2D_SBC_HDR_S_MSK 0x40
+#define A2D_SBC_HDR_L_MSK 0x20
+#define A2D_SBC_HDR_NUM_MSK 0x0F
+
+/*****************************************************************************
+** Type Definitions
+*****************************************************************************/
+
+/* data type for the SBC Codec Information Element*/
+typedef struct
+{
+ UINT8 samp_freq; /* Sampling frequency */
+ UINT8 ch_mode; /* Channel mode */
+ UINT8 block_len; /* Block length */
+ UINT8 num_subbands; /* Number of subbands */
+ UINT8 alloc_mthd; /* Allocation method */
+ UINT8 max_bitpool; /* Maximum bitpool */
+ UINT8 min_bitpool; /* Minimum bitpool */
+} tA2D_SBC_CIE;
+
+
+/*****************************************************************************
+** External Function Declarations
+*****************************************************************************/
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/******************************************************************************
+**
+** Function A2D_SbcChkFrInit
+**
+** Description check if need to init the descramble control block.
+**
+** Returns nothing.
+******************************************************************************/
+A2D_API extern void A2D_SbcChkFrInit(UINT8 *p_pkt);
+
+/******************************************************************************
+**
+** Function A2D_SbcDescramble
+**
+** Description descramble the packet.
+**
+** Returns nothing.
+******************************************************************************/
+A2D_API extern void A2D_SbcDescramble(UINT8 *p_pkt, UINT16 len);
+
+/******************************************************************************
+**
+** Function A2D_BldSbcInfo
+**
+** Description This function is called by an application to build
+** the SBC Media Codec Capabilities byte sequence
+** beginning from the LOSC octet.
+** Input Parameters:
+** media_type: Indicates Audio, or Multimedia.
+**
+** p_ie: The SBC 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_BldSbcInfo(UINT8 media_type, tA2D_SBC_CIE *p_ie,
+ UINT8 *p_result);
+
+/******************************************************************************
+**
+** Function A2D_ParsSbcInfo
+**
+** Description This function is called by an application to parse
+** the SBC 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: The SBC Codec Information Element information.
+**
+** Returns A2D_SUCCESS if function execution succeeded.
+** Error status code, otherwise.
+******************************************************************************/
+A2D_API extern tA2D_STATUS A2D_ParsSbcInfo(tA2D_SBC_CIE *p_ie, UINT8 *p_info,
+ BOOLEAN for_caps);
+
+/******************************************************************************
+**
+** Function A2D_BldSbcMplHdr
+**
+** Description This function is called by an application to parse
+** the SBC Media Payload header.
+** Input Parameters:
+** frag: 1, if fragmented. 0, otherwise.
+**
+** start: 1, if the starting packet of a fragmented frame.
+**
+** last: 1, if the last packet of a fragmented frame.
+**
+** num: If frag is 1, this is the number of remaining fragments
+** (including this fragment) of this frame.
+** If frag is 0, this is the number of frames in this packet.
+**
+** Output Parameters:
+** p_dst: the resulting media payload header byte sequence.
+**
+** Returns void.
+******************************************************************************/
+A2D_API extern void A2D_BldSbcMplHdr(UINT8 *p_dst, BOOLEAN frag, BOOLEAN start,
+ BOOLEAN last, UINT8 num);
+
+/******************************************************************************
+**
+** Function A2D_ParsSbcMplHdr
+**
+** Description This function is called by an application to parse
+** the SBC Media Payload header.
+** Input Parameters:
+** p_src: the byte sequence to parse..
+**
+** Output Parameters:
+** frag: 1, if fragmented. 0, otherwise.
+**
+** start: 1, if the starting packet of a fragmented frame.
+**
+** last: 1, if the last packet of a fragmented frame.
+**
+** num: If frag is 1, this is the number of remaining fragments
+** (including this fragment) of this frame.
+** If frag is 0, this is the number of frames in this packet.
+**
+** Returns void.
+******************************************************************************/
+A2D_API extern void A2D_ParsSbcMplHdr(UINT8 *p_src, BOOLEAN *p_frag,
+ BOOLEAN *p_start, BOOLEAN *p_last,
+ UINT8 *p_num);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* A2D_SBC_H */
generated by cgit v1.1 at 2024-05-02 06:06:21 +0000