1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "a2dp_sink.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "bluetooth_psm.h" 44 #include "bluetooth_sdp.h" 45 #include "btstack_debug.h" 46 #include "btstack_event.h" 47 #include "classic/a2dp_sink.h" 48 #include "classic/avdtp_sink.h" 49 #include "classic/avdtp_util.h" 50 #include "classic/sdp_util.h" 51 52 static const char * default_a2dp_sink_service_name = "BTstack A2DP Sink Service"; 53 static const char * default_a2dp_sink_service_provider_name = "BTstack A2DP Sink Service Provider"; 54 55 static a2dp_state_t app_state = A2DP_IDLE; 56 static int send_stream_established_for_outgoing_connection; 57 58 static avdtp_stream_endpoint_context_t sc; 59 60 static btstack_packet_handler_t a2dp_sink_packet_handler_user; 61 62 static void a2dp_sink_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 63 64 void a2dp_sink_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 65 uint8_t* attribute; 66 de_create_sequence(service); 67 68 // 0x0000 "Service Record Handle" 69 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 70 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 71 72 // 0x0001 "Service Class ID List" 73 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 74 attribute = de_push_sequence(service); 75 { 76 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SINK); 77 } 78 de_pop_sequence(service, attribute); 79 80 // 0x0004 "Protocol Descriptor List" 81 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 82 attribute = de_push_sequence(service); 83 { 84 uint8_t* l2cpProtocol = de_push_sequence(attribute); 85 { 86 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 87 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 88 } 89 de_pop_sequence(attribute, l2cpProtocol); 90 91 uint8_t* avProtocol = de_push_sequence(attribute); 92 { 93 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 94 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 95 } 96 de_pop_sequence(attribute, avProtocol); 97 } 98 de_pop_sequence(service, attribute); 99 100 // 0x0005 "Public Browse Group" 101 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 102 attribute = de_push_sequence(service); 103 { 104 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 105 } 106 de_pop_sequence(service, attribute); 107 108 // 0x0009 "Bluetooth Profile Descriptor List" 109 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 110 attribute = de_push_sequence(service); 111 { 112 uint8_t *a2dProfile = de_push_sequence(attribute); 113 { 114 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 115 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 116 } 117 de_pop_sequence(attribute, a2dProfile); 118 } 119 de_pop_sequence(service, attribute); 120 121 122 // 0x0100 "Service Name" 123 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 124 if (service_name){ 125 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 126 } else { 127 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_name), (uint8_t *) default_a2dp_sink_service_name); 128 } 129 130 // 0x0100 "Provider Name" 131 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 132 if (service_provider_name){ 133 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 134 } else { 135 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_provider_name), (uint8_t *) default_a2dp_sink_service_provider_name); 136 } 137 138 // 0x0311 "Supported Features" 139 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 140 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 141 } 142 143 void a2dp_sink_register_packet_handler(btstack_packet_handler_t callback){ 144 // avdtp_sink_register_packet_handler(callback); 145 // return; 146 if (callback == NULL){ 147 log_error("a2dp_sink_register_packet_handler called with NULL callback"); 148 return; 149 } 150 avdtp_sink_register_packet_handler(&a2dp_sink_packet_handler_internal); 151 a2dp_sink_packet_handler_user = callback; 152 } 153 154 void a2dp_sink_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 155 if (callback == NULL){ 156 log_error("a2dp_sink_register_media_handler called with NULL callback"); 157 return; 158 } 159 avdtp_sink_register_media_handler(callback); 160 } 161 162 void a2dp_sink_init(void){ 163 avdtp_sink_init(); 164 } 165 166 avdtp_stream_endpoint_t * a2dp_sink_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 167 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 168 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 169 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); 170 if (!local_stream_endpoint){ 171 return NULL; 172 } 173 avdtp_sink_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 174 avdtp_sink_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 175 codec_capabilities, codec_capabilities_len); 176 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 177 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 178 avdtp_sink_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 179 return local_stream_endpoint; 180 } 181 182 uint8_t a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid, uint16_t * avdtp_cid){ 183 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 184 if (!sc.local_stream_endpoint){ 185 log_info("No local_stream_endpoint for seid %d", local_seid); 186 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 187 } 188 // remember to tell client 189 send_stream_established_for_outgoing_connection = 1; 190 return avdtp_sink_connect(bd_addr, avdtp_cid); 191 } 192 193 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 194 avdtp_disconnect(a2dp_cid); 195 } 196 197 static inline void a2dp_signaling_emit_media_codec_sbc(uint8_t * event, uint16_t event_size){ 198 if (event_size < 18) return; 199 event[0] = HCI_EVENT_A2DP_META; 200 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 201 (*a2dp_sink_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 202 } 203 204 static inline void a2dp_signaling_emit_media_codec_other(uint8_t * event, uint16_t event_size){ 205 if (event_size < 113) return; 206 event[0] = HCI_EVENT_A2DP_META; 207 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 208 (*a2dp_sink_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 209 } 210 211 static inline void a2dp_emit_stream_event(uint16_t a2dp_cid, uint8_t eventID, uint8_t local_seid){ 212 uint8_t event[6]; 213 int pos = 0; 214 event[pos++] = HCI_EVENT_A2DP_META; 215 event[pos++] = sizeof(event) - 2; 216 event[pos++] = eventID; 217 little_endian_store_16(event, pos, a2dp_cid); 218 pos += 2; 219 event[pos++] = local_seid; 220 (*a2dp_sink_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 221 } 222 223 static inline void a2dp_emit_signaling_connection_released(uint16_t a2dp_cid){ 224 uint8_t event[5]; 225 int pos = 0; 226 event[pos++] = HCI_EVENT_A2DP_META; 227 event[pos++] = sizeof(event) - 2; 228 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 229 little_endian_store_16(event, pos, a2dp_cid); 230 pos += 2; 231 (*a2dp_sink_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 232 } 233 234 static inline void a2dp_emit_cmd_rejected(uint8_t * packet, uint16_t size){ 235 UNUSED(size); 236 packet[0] = HCI_EVENT_A2DP_META; 237 packet[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 238 (*a2dp_sink_packet_handler_user)(HCI_EVENT_PACKET, 0, packet, size); 239 } 240 241 static void a2dp_sink_handle_signaling_accept(uint8_t * packet){ 242 uint8_t signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 243 uint16_t cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 244 uint8_t loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 245 246 switch (signal_identifier){ 247 case AVDTP_SI_START: 248 a2dp_emit_stream_event(cid, A2DP_SUBEVENT_STREAM_STARTED, loc_seid); 249 break; 250 case AVDTP_SI_SUSPEND: 251 a2dp_emit_stream_event(cid, A2DP_SUBEVENT_STREAM_SUSPENDED, loc_seid); 252 break; 253 case AVDTP_SI_ABORT: 254 case AVDTP_SI_CLOSE: 255 a2dp_emit_stream_event(cid, A2DP_SUBEVENT_STREAM_STOPPED, loc_seid); 256 break; 257 default: 258 // a2dp_emit_cmd_accepted(a2dp_sink_packet_handler_user, packet, size); 259 break; 260 } 261 } 262 263 static void a2dp_sink_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 264 UNUSED(channel); 265 UNUSED(size); 266 bd_addr_t address; 267 uint8_t status; 268 uint16_t cid; 269 uint8_t loc_seid; 270 uint8_t rem_seid; 271 272 if (packet_type != HCI_EVENT_PACKET) return; 273 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 274 275 switch (packet[2]){ 276 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 277 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 278 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 279 status = avdtp_subevent_signaling_connection_established_get_status(packet); 280 if (status != 0){ 281 app_state = A2DP_IDLE; 282 283 // only care for outgoing connections 284 if (send_stream_established_for_outgoing_connection == 0) break; 285 send_stream_established_for_outgoing_connection = 0; 286 287 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 288 a2dp_streaming_emit_connection_established(a2dp_sink_packet_handler_user, cid, address, 0, 0, status); 289 break; 290 } 291 app_state = A2DP_CONNECTED; 292 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", cid); 293 break; 294 295 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 296 a2dp_signaling_emit_media_codec_other(packet, size); 297 break; 298 299 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 300 a2dp_signaling_emit_media_codec_sbc(packet, size); 301 break; 302 303 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 304 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 305 status = avdtp_subevent_streaming_connection_established_get_status(packet); 306 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 307 loc_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 308 rem_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 309 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x, status %d ---", cid, status); 310 311 // about to notify client 312 send_stream_established_for_outgoing_connection = 0; 313 314 if (status){ 315 a2dp_streaming_emit_connection_established(a2dp_sink_packet_handler_user, cid, address, loc_seid, rem_seid, status); 316 break; 317 } 318 app_state = A2DP_STREAMING_OPENED; 319 a2dp_streaming_emit_connection_established(a2dp_sink_packet_handler_user, cid, address, loc_seid, rem_seid, 0); 320 break; 321 322 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 323 a2dp_sink_handle_signaling_accept(packet); 324 break; 325 326 case AVDTP_SUBEVENT_SIGNALING_REJECT: 327 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 328 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 329 loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 330 a2dp_emit_cmd_rejected(packet, size); 331 app_state = A2DP_CONNECTED; 332 break; 333 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 334 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 335 loc_seid = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 336 app_state = A2DP_IDLE; 337 a2dp_emit_stream_event(cid, A2DP_SUBEVENT_STREAM_RELEASED, loc_seid); 338 break; 339 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 340 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 341 342 // for outgoing connections, suppress release event and report stream established failed 343 if (send_stream_established_for_outgoing_connection){ 344 send_stream_established_for_outgoing_connection = 0; 345 log_info("A2DP sink outgoing connnection failed - disconnect"); 346 a2dp_streaming_emit_connection_established(a2dp_sink_packet_handler_user, cid, address, 0, 0, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 347 break; 348 } 349 350 a2dp_emit_signaling_connection_released(cid); 351 app_state = A2DP_IDLE; 352 break; 353 default: 354 break; 355 } 356 357 } 358 359