1 /* 2 * avdtp_internal.h - avdtp handling 3 4 * Copyright (c) 2015-2016 Intel Corporation 5 * Copyright 2021,2024 NXP 6 * 7 * SPDX-License-Identifier: Apache-2.0 8 */ 9 10 #include <zephyr/bluetooth/classic/avdtp.h> 11 12 /* @brief A2DP ROLE's */ 13 #define A2DP_SRC_ROLE 0x00 14 #define A2DP_SNK_ROLE 0x01 15 16 /* @brief AVDTP Role */ 17 #define BT_AVDTP_INT 0x00 18 #define BT_AVDTP_ACP 0x01 19 20 #define BT_L2CAP_PSM_AVDTP 0x0019 21 22 /* AVDTP SIGNAL HEADER - Packet Type*/ 23 #define BT_AVDTP_PACKET_TYPE_SINGLE 0x00 24 #define BT_AVDTP_PACKET_TYPE_START 0x01 25 #define BT_AVDTP_PACKET_TYPE_CONTINUE 0x02 26 #define BT_AVDTP_PACKET_TYPE_END 0x03 27 28 /* AVDTP SIGNAL HEADER - MESSAGE TYPE */ 29 #define BT_AVDTP_CMD 0x00 30 #define BT_AVDTP_GEN_REJECT 0x01 31 #define BT_AVDTP_ACCEPT 0x02 32 #define BT_AVDTP_REJECT 0x03 33 34 /* @brief AVDTP SIGNAL HEADER - Signal Identifier */ 35 #define BT_AVDTP_DISCOVER 0x01 36 #define BT_AVDTP_GET_CAPABILITIES 0x02 37 #define BT_AVDTP_SET_CONFIGURATION 0x03 38 #define BT_AVDTP_GET_CONFIGURATION 0x04 39 #define BT_AVDTP_RECONFIGURE 0x05 40 #define BT_AVDTP_OPEN 0x06 41 #define BT_AVDTP_START 0x07 42 #define BT_AVDTP_CLOSE 0x08 43 #define BT_AVDTP_SUSPEND 0x09 44 #define BT_AVDTP_ABORT 0x0a 45 #define BT_AVDTP_SECURITY_CONTROL 0x0b 46 #define BT_AVDTP_GET_ALL_CAPABILITIES 0x0c 47 #define BT_AVDTP_DELAYREPORT 0x0d 48 49 /* @brief AVDTP STREAM STATE */ 50 #define BT_AVDTP_STREAM_STATE_IDLE 0x01 51 #define BT_AVDTP_STREAM_STATE_CONFIGURED 0x02 52 #define BT_AVDTP_STREAM_STATE_OPEN 0x03 53 #define BT_AVDTP_STREAM_STATE_STREAMING 0x04 54 #define BT_AVDTP_STREAM_STATE_CLOSING 0x05 55 56 /* @brief AVDTP Media TYPE */ 57 #define BT_AVDTP_SERVICE_CAT_MEDIA_TRANSPORT 0x01 58 #define BT_AVDTP_SERVICE_CAT_REPORTING 0x02 59 #define BT_AVDTP_SERVICE_CAT_RECOVERY 0x03 60 #define BT_AVDTP_SERVICE_CAT_CONTENT_PROTECTION 0x04 61 #define BT_AVDTP_SERVICE_CAT_HDR_COMPRESSION 0x05 62 #define BT_AVDTP_SERVICE_CAT_MULTIPLEXING 0x06 63 #define BT_AVDTP_SERVICE_CAT_MEDIA_CODEC 0x07 64 #define BT_AVDTP_SERVICE_CAT_DELAYREPORTING 0x08 65 66 /* AVDTP Error Codes */ 67 #define BT_AVDTP_SUCCESS 0x00 68 #define BT_AVDTP_ERR_BAD_HDR_FORMAT 0x01 69 #define BT_AVDTP_ERR_BAD_LENGTH 0x11 70 #define BT_AVDTP_ERR_BAD_ACP_SEID 0x12 71 #define BT_AVDTP_ERR_SEP_IN_USE 0x13 72 #define BT_AVDTP_ERR_SEP_NOT_IN_USE 0x14 73 #define BT_AVDTP_ERR_BAD_SERV_CATEGORY 0x17 74 #define BT_AVDTP_ERR_BAD_PAYLOAD_FORMAT 0x18 75 #define BT_AVDTP_ERR_NOT_SUPPORTED_COMMAND 0x19 76 #define BT_AVDTP_ERR_INVALID_CAPABILITIES 0x1a 77 #define BT_AVDTP_ERR_BAD_RECOVERY_TYPE 0x22 78 #define BT_AVDTP_ERR_BAD_MEDIA_TRANSPORT_FORMAT 0x23 79 #define BT_AVDTP_ERR_BAD_RECOVERY_FORMAT 0x25 80 #define BT_AVDTP_ERR_BAD_ROHC_FORMAT 0x26 81 #define BT_AVDTP_ERR_BAD_CP_FORMAT 0x27 82 #define BT_AVDTP_ERR_BAD_MULTIPLEXING_FORMAT 0x28 83 #define BT_AVDTP_ERR_UNSUPPORTED_CONFIGURAION 0x29 84 #define BT_AVDTP_ERR_BAD_STATE 0x31 85 86 #define BT_AVDTP_MIN_SEID 0x01 87 #define BT_AVDTP_MAX_SEID 0x3E 88 89 struct bt_avdtp; 90 struct bt_avdtp_req; 91 struct bt_avdtp_sep_info; 92 93 /** @brief AVDTP SEID Information AVDTP_SPEC V13 Table 8.8 */ 94 struct bt_avdtp_sep_data { 95 #ifdef CONFIG_LITTLE_ENDIAN 96 uint8_t rfa0:1; 97 uint8_t inuse:1; 98 uint8_t id:6; 99 uint8_t rfa1:3; 100 uint8_t tsep:1; 101 uint8_t media_type:4; 102 #else 103 uint8_t id:6; 104 uint8_t inuse:1; 105 uint8_t rfa0:1; 106 uint8_t media_type:4; 107 uint8_t tsep:1; 108 uint8_t rfa1:3; 109 #endif 110 } __packed; 111 112 typedef int (*bt_avdtp_func_t)(struct bt_avdtp_req *req); 113 114 struct bt_avdtp_req { 115 uint8_t sig; 116 uint8_t tid; 117 bt_avdtp_func_t func; 118 }; 119 120 struct bt_avdtp_single_sig_hdr { 121 uint8_t hdr; 122 uint8_t signal_id; 123 } __packed; 124 125 struct bt_avdtp_media_hdr { 126 #ifdef CONFIG_LITTLE_ENDIAN 127 uint8_t CSRC_count:4; 128 uint8_t header_extension:1; 129 uint8_t padding:1; 130 uint8_t RTP_version:2; 131 uint8_t playload_type:7; 132 uint8_t marker:1; 133 #else 134 uint8_t RTP_version:2; 135 uint8_t padding:1; 136 uint8_t header_extension:1; 137 uint8_t CSRC_count:4; 138 uint8_t marker:1; 139 uint8_t playload_type:7; 140 #endif 141 uint16_t sequence_number; 142 uint32_t time_stamp; 143 uint32_t synchronization_source; 144 } __packed; 145 146 struct bt_avdtp_discover_params { 147 struct bt_avdtp_req req; 148 uint8_t status; 149 struct net_buf *buf; 150 }; 151 152 struct bt_avdtp_get_capabilities_params { 153 struct bt_avdtp_req req; 154 uint8_t status; 155 uint8_t stream_endpoint_id; 156 struct net_buf *buf; 157 }; 158 159 struct bt_avdtp_set_configuration_params { 160 struct bt_avdtp_req req; 161 struct bt_avdtp_sep *sep; 162 uint8_t status; 163 uint8_t acp_stream_ep_id; 164 uint8_t int_stream_endpoint_id; 165 uint8_t media_type; 166 uint8_t media_codec_type; 167 uint8_t codec_specific_ie_len; 168 uint8_t *codec_specific_ie; 169 }; 170 171 struct bt_avdtp_open_params { 172 struct bt_avdtp_req req; 173 struct bt_avdtp_sep *sep; 174 uint8_t status; 175 uint8_t acp_stream_ep_id; 176 }; 177 178 struct bt_avdtp_start_params { 179 struct bt_avdtp_req req; 180 struct bt_avdtp_sep *sep; 181 uint8_t status; 182 uint8_t acp_stream_ep_id; 183 }; 184 185 struct bt_avdtp_ops_cb { 186 void (*connected)(struct bt_avdtp *session); 187 188 void (*disconnected)(struct bt_avdtp *session); 189 190 struct net_buf *(*alloc_buf)(struct bt_avdtp *session); 191 192 int (*discovery_ind)(struct bt_avdtp *session, uint8_t *errcode); 193 194 int (*get_capabilities_ind)(struct bt_avdtp *session, 195 struct bt_avdtp_sep *sep, struct net_buf *rsp_buf, uint8_t *errcode); 196 197 int (*set_configuration_ind)(struct bt_avdtp *session, struct bt_avdtp_sep *sep, 198 uint8_t int_seid, struct net_buf *buf, uint8_t *errcode); 199 200 int (*open_ind)(struct bt_avdtp *session, 201 struct bt_avdtp_sep *sep, uint8_t *errcode); 202 203 int (*close_ind)(struct bt_avdtp *session, 204 struct bt_avdtp_sep *sep, uint8_t *errcode); 205 206 int (*start_ind)(struct bt_avdtp *session, 207 struct bt_avdtp_sep *sep, uint8_t *errcode); 208 209 int (*suspend_ind)(struct bt_avdtp *session, 210 struct bt_avdtp_sep *sep, uint8_t *errcode); 211 212 int (*abort_ind)(struct bt_avdtp *session, 213 struct bt_avdtp_sep *sep, uint8_t *errcode); 214 }; 215 216 /** @brief Global AVDTP session structure. */ 217 struct bt_avdtp { 218 struct bt_l2cap_br_chan br_chan; 219 struct bt_avdtp_req *req; 220 const struct bt_avdtp_ops_cb *ops; 221 struct bt_avdtp_sep *current_sep; 222 struct k_work_delayable timeout_work; 223 uint8_t signalling_l2cap_connected; 224 }; 225 226 struct bt_avdtp_event_cb { 227 int (*accept)(struct bt_conn *conn, struct bt_avdtp **session); 228 }; 229 230 /* Initialize AVDTP layer*/ 231 int bt_avdtp_init(void); 232 233 /* Application register with AVDTP layer */ 234 int bt_avdtp_register(struct bt_avdtp_event_cb *cb); 235 236 /* AVDTP connect */ 237 int bt_avdtp_connect(struct bt_conn *conn, struct bt_avdtp *session); 238 239 /* AVDTP disconnect */ 240 int bt_avdtp_disconnect(struct bt_avdtp *session); 241 242 /* AVDTP SEP register function */ 243 int bt_avdtp_register_sep(uint8_t media_type, uint8_t role, 244 struct bt_avdtp_sep *sep); 245 246 /* AVDTP Discover Request */ 247 int bt_avdtp_discover(struct bt_avdtp *session, 248 struct bt_avdtp_discover_params *param); 249 250 /* Parse the sep of discovered result */ 251 int bt_avdtp_parse_sep(struct net_buf *buf, struct bt_avdtp_sep_info *sep_info); 252 253 /* AVDTP Get Capabilities */ 254 int bt_avdtp_get_capabilities(struct bt_avdtp *session, 255 struct bt_avdtp_get_capabilities_params *param); 256 257 /* Parse the codec type of capabilities */ 258 int bt_avdtp_parse_capability_codec(struct net_buf *buf, uint8_t *codec_type, 259 uint8_t **codec_info_element, uint16_t *codec_info_element_len); 260 261 /* AVDTP Set Configuration */ 262 int bt_avdtp_set_configuration(struct bt_avdtp *session, 263 struct bt_avdtp_set_configuration_params *param); 264 265 /* AVDTP reconfigure */ 266 int bt_avdtp_reconfigure(struct bt_avdtp *session, 267 struct bt_avdtp_set_configuration_params *param); 268 269 /* AVDTP OPEN */ 270 int bt_avdtp_open(struct bt_avdtp *session, 271 struct bt_avdtp_open_params *param); 272 273 /* AVDTP START */ 274 int bt_avdtp_start(struct bt_avdtp *session, 275 struct bt_avdtp_start_params *param); 276 277 /* AVDTP send data */ 278 int bt_avdtp_send_media_data(struct bt_avdtp_sep *sep, struct net_buf *buf); 279 280 /* get media l2cap connection MTU */ 281 uint32_t bt_avdtp_get_media_mtu(struct bt_avdtp_sep *sep); 282
