android10/system/bt/stack/avdt/avdt_defs.h

/******************************************************************************
 *
 *  Copyright 2002-2012 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.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  This contains constants definitions and other information from the AVDTP
 *  specification.  This file is intended for use internal to AVDT only.
 *
 ******************************************************************************/
#ifndef AVDT_DEFS_H
#define AVDT_DEFS_H

/*****************************************************************************
 * constants
 ****************************************************************************/

/* signalling packet type */
#define AVDT_PKT_TYPE_SINGLE 0 /* single packet */
#define AVDT_PKT_TYPE_START 1  /* start packet */
#define AVDT_PKT_TYPE_CONT 2   /* continue packet */
#define AVDT_PKT_TYPE_END 3    /* end packet */

/* signalling message type */
#define AVDT_MSG_TYPE_CMD 0 /* command */
#define AVDT_MSG_TYPE_GRJ 1 /* general reject */
#define AVDT_MSG_TYPE_RSP 2 /* response accept */
#define AVDT_MSG_TYPE_REJ 3 /* response reject */

/* signalling messages */
#define AVDT_SIG_DISCOVER 1    /* discover */
#define AVDT_SIG_GETCAP 2      /* get capabilities */
#define AVDT_SIG_SETCONFIG 3   /* set configuration */
#define AVDT_SIG_GETCONFIG 4   /* get configuration */
#define AVDT_SIG_RECONFIG 5    /* reconfigure */
#define AVDT_SIG_OPEN 6        /* open */
#define AVDT_SIG_START 7       /* start */
#define AVDT_SIG_CLOSE 8       /* close */
#define AVDT_SIG_SUSPEND 9     /* suspend */
#define AVDT_SIG_ABORT 10      /* abort */
#define AVDT_SIG_SECURITY 11   /* security control */
#define AVDT_SIG_GET_ALLCAP 12 /* get all capabilities */
#define AVDT_SIG_DELAY_RPT 13  /* delay report */

/* maximum signal value */
#define AVDT_SIG_MAX AVDT_SIG_DELAY_RPT

/* used for general reject */
#define AVDT_SIG_NONE 0

/* some maximum and minimum sizes of signalling messages */
#define AVDT_DISCOVER_REQ_MIN 1
#define AVDT_DISCOVER_REQ_MAX 124

/* service category information element field values */
#define AVDT_CAT_TRANS 1     /* Media Transport */
#define AVDT_CAT_REPORT 2    /* Reporting */
#define AVDT_CAT_RECOV 3     /* Recovery */
#define AVDT_CAT_PROTECT 4   /* Content Protection */
#define AVDT_CAT_HDRCMP 5    /* Header Compression */
#define AVDT_CAT_MUX 6       /* Multiplexing */
#define AVDT_CAT_CODEC 7     /* Media Codec */
#define AVDT_CAT_DELAY_RPT 8 /* Delay Reporting */
#define AVDT_CAT_MAX_CUR AVDT_CAT_DELAY_RPT

/* min/max lengths of service category information elements */
#define AVDT_LEN_TRANS_MIN 0
#define AVDT_LEN_REPORT_MIN 0
#define AVDT_LEN_RECOV_MIN 3
#define AVDT_LEN_PROTECT_MIN 2
#define AVDT_LEN_HDRCMP_MIN 1
#define AVDT_LEN_MUX_MIN 3
#define AVDT_LEN_CODEC_MIN 2
#define AVDT_LEN_DELAY_RPT_MIN 0

#define AVDT_LEN_TRANS_MAX 0
#define AVDT_LEN_REPORT_MAX 0
#define AVDT_LEN_RECOV_MAX 3
#define AVDT_LEN_PROTECT_MAX 255
#define AVDT_LEN_HDRCMP_MAX 1
#define AVDT_LEN_MUX_MAX 7
#define AVDT_LEN_CODEC_MAX 255
#define AVDT_LEN_DELAY_RPT_MAX 0

/* minimum possible size of configuration or capabilities data */
#define AVDT_LEN_CFG_MIN 2

/* minimum and maximum lengths for different message types */
#define AVDT_LEN_SINGLE 1
#define AVDT_LEN_SETCONFIG_MIN 2
#define AVDT_LEN_RECONFIG_MIN 1
#define AVDT_LEN_MULTI_MIN 1
#define AVDT_LEN_SECURITY_MIN 1
#define AVDT_LEN_DELAY_RPT 3

/* header lengths for different packet types */
#define AVDT_LEN_TYPE_SINGLE 2 /* single packet */
#define AVDT_LEN_TYPE_START 3  /* start packet */
#define AVDT_LEN_TYPE_CONT 1   /* continue packet */
#define AVDT_LEN_TYPE_END 1    /* end packet */

/* length of general reject message */
#define AVDT_LEN_GEN_REJ 2

/* recovery service capabilities information elements */
/* min value for maximum recovery window */
#define AVDT_RECOV_MRWS_MIN 0x01
/* max value for maximum recovery window */
#define AVDT_RECOV_MRWS_MAX 0x18
/* min value for maximum number of media packets */
#define AVDT_RECOV_MNMP_MIN 0x01
/* max value for maximum number of media packets */
#define AVDT_RECOV_MNMP_MAX 0x18

/* SEID value range */
#define AVDT_SEID_MIN 0x01
#define AVDT_SEID_MAX 0x3E

/* first byte of media packet header */
#define AVDT_MEDIA_OCTET1 0x80

/* for adaptation layer header */
/* coding of length field */
#define AVDT_ALH_LCODE_MASK 0x03
/* No length field present. Take length from l2cap */
#define AVDT_ALH_LCODE_NONE 0x00
/* 16bit length field */
#define AVDT_ALH_LCODE_16BIT 0x01
/* 9 bit length field, MSB = 0, 8 LSBs in 1 octet following */
#define AVDT_ALH_LCODE_9BITM0 0x02
/* 9 bit length field, MSB = 1, 8 LSBs in 1 octet following */
#define AVDT_ALH_LCODE_9BITM1 0x03

/* set this for continuation packet */
#define AVDT_ALH_FRAG_MASK 0x04

/*****************************************************************************
 * message parsing and building macros
 ****************************************************************************/

#define AVDT_MSG_PRS_HDR(p, lbl, pkt, msg) \
  do {                                     \
    (lbl) = (*(p) >> 4) & 0x0F;            \
    (pkt) = (*(p) >> 2) & 0x03;            \
    (msg) = *(p)++ & 0x03;                 \
  } while (0)

#define AVDT_MSG_PRS_DISC(p, seid, in_use, type, tsep) \
  do {                                                 \
    (seid) = *(p) >> 2;                                \
    (in_use) = (*(p)++ >> 1) & 0x01;                   \
    (type) = (*(p) >> 4) & 0x0F;                       \
    (tsep) = (*(p)++ >> 3) & 0x01;                     \
  } while (0)

#define AVDT_MSG_PRS_SIG(p, sig) \
  do {                           \
    (sig) = (*(p)++) & 0x3F;     \
  } while (0)

#define AVDT_MSG_PRS_SEID(p, seid)   \
  do {                               \
    (seid) = ((*(p)++) >> 2) & 0x3F; \
  } while (0)

#define AVDT_MSG_PRS_PKT_TYPE(p, pkt) \
  do {                                \
    (pkt) = (*(p) >> 2) & 0x03;       \
  } while (0)

#define AVDT_MSG_PRS_OCTET1(p, o_v, o_p, o_x, o_cc) \
  do {                                              \
    (o_v) = (*(p) >> 6) & 0x02;                     \
    (o_p) = (*(p) >> 5) & 0x01;                     \
    (o_x) = (*(p) >> 4) & 0x01;                     \
    (o_cc) = (*(p)++) & 0x0F;                       \
  } while (0)

#define AVDT_MSG_PRS_RPT_OCTET1(p, o_v, o_p, o_cc) \
  do {                                             \
    (o_v) = (*(p) >> 6) & 0x02;                    \
    (o_p) = (*(p) >> 5) & 0x01;                    \
    (o_cc) = (*(p)++) & 0x1F;                      \
  } while (0)

#define AVDT_MSG_PRS_M_PT(p, m_pt, marker) \
  do {                                     \
    (marker) = (*(p) >> 7) & 0x01;         \
    (m_pt) = (*(p)++) & 0x7F;              \
  } while (0)

#define AVDT_MSG_BLD_HDR(p, lbl, pkt, msg)                 \
  do {                                                     \
    *(p)++ = (uint8_t)((lbl) << 4) | ((pkt) << 2) | (msg); \
  } while (0)

#define AVDT_MSG_BLD_DISC(p, seid, in_use, type, tsep)   \
  do {                                                   \
    *(p)++ = (uint8_t)(((seid) << 2) | ((in_use) << 1)); \
    *(p)++ = (uint8_t)(((type) << 4) | ((tsep) << 3));   \
  } while (0)

#define AVDT_MSG_BLD_SIG(p, sig) \
  do {                           \
    *(p)++ = (uint8_t)(sig);     \
  } while (0)

#define AVDT_MSG_BLD_SEID(p, seid)   \
  do {                               \
    *(p)++ = (uint8_t)((seid) << 2); \
  } while (0)

#define AVDT_MSG_BLD_ERR(p, err) \
  do {                           \
    *(p)++ = (uint8_t)(err);     \
  } while (0)

#define AVDT_MSG_BLD_PARAM(p, param) \
  do {                               \
    *(p)++ = (uint8_t)(param);       \
  } while (0)

#define AVDT_MSG_BLD_NOSP(p, nosp) \
  do {                             \
    *(p)++ = (uint8_t)(nosp);      \
  } while (0)

#endif /* AVDT_DEFS_H */