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 BLUEKITCHEN 24 * GMBH 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 * a2dp_sink_default_service_name = "BTstack A2DP Sink Service"; 53 static const char * a2dp_sink_default_service_provider_name = "BTstack A2DP Sink Service Provider"; 54 55 static uint16_t a2dp_sink_cid; 56 static bool a2dp_sink_outgoing_active = false; 57 static bool a2dp_sink_stream_endpoint_configured = false; 58 59 static btstack_packet_handler_t a2dp_sink_packet_handler_user; 60 static uint8_t (*a2dp_sink_media_config_validator)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size); 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(a2dp_sink_default_service_name), (uint8_t *) a2dp_sink_default_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(a2dp_sink_default_service_provider_name), (uint8_t *) a2dp_sink_default_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 void a2dp_sink_deinit(void){ 167 avdtp_sink_deinit(); 168 169 a2dp_sink_cid = 0; 170 a2dp_sink_packet_handler_user = NULL; 171 a2dp_sink_media_config_validator = NULL; 172 a2dp_sink_outgoing_active = false; 173 a2dp_sink_stream_endpoint_configured = false; 174 } 175 176 avdtp_stream_endpoint_t * a2dp_sink_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 177 const uint8_t *codec_capabilities, uint16_t codec_capabilities_len, 178 uint8_t * codec_configuration, uint16_t codec_configuration_len){ 179 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); 180 if (!local_stream_endpoint){ 181 return NULL; 182 } 183 avdtp_sink_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 184 avdtp_sink_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 185 codec_capabilities, codec_capabilities_len); 186 avdtp_sink_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 187 188 // store user codec configuration buffer 189 local_stream_endpoint->media_codec_configuration_info = codec_configuration; 190 local_stream_endpoint->media_codec_configuration_len = codec_configuration_len; 191 192 return local_stream_endpoint; 193 } 194 195 void a2dp_sink_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 196 avdtp_sink_finalize_stream_endpoint(stream_endpoint); 197 } 198 199 uint8_t a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid, uint16_t * avdtp_cid){ 200 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 201 if (stream_endpoint == NULL){ 202 log_info("No local_stream_endpoint for seid %d", local_seid); 203 return ERROR_CODE_COMMAND_DISALLOWED; 204 } 205 // remember to tell client 206 a2dp_sink_outgoing_active = true; 207 return avdtp_sink_connect(bd_addr, avdtp_cid); 208 } 209 210 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 211 uint8_t a2dp_sink_start_stream_accept(uint16_t a2dp_cid, uint8_t local_seid){ 212 return avdtp_start_stream_accept(a2dp_cid, local_seid); 213 } 214 215 uint8_t a2dp_sink_start_stream_reject(uint16_t a2dp_cid, uint8_t local_seid){ 216 return avdtp_start_stream_reject(a2dp_cid, local_seid); 217 } 218 #endif 219 220 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 221 avdtp_disconnect(a2dp_cid); 222 } 223 224 static void a2dp_sink_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 225 UNUSED(channel); 226 UNUSED(size); 227 228 uint8_t status; 229 uint8_t local_seid; 230 uint8_t signal_identifier; 231 bool reconfigure; 232 uint8_t subevent_id; 233 234 if (packet_type != HCI_EVENT_PACKET) return; 235 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 236 237 switch (packet[2]){ 238 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 239 if (a2dp_sink_stream_endpoint_configured) return; 240 241 status = avdtp_subevent_signaling_connection_established_get_status(packet); 242 if (status != ERROR_CODE_SUCCESS){ 243 // only care for outgoing connections 244 if (!a2dp_sink_outgoing_active) break; 245 a2dp_sink_outgoing_active = false; 246 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 247 log_info("A2DP sink signaling connection failed status %d", status); 248 break; 249 } 250 251 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED); 252 log_info("A2DP sink signaling connection established avdtp_cid 0x%02x", avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet)); 253 break; 254 255 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 256 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AUDIO_CONFIGURATION: 257 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_MPEG_AAC_CONFIGURATION: 258 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_ATRAC_CONFIGURATION: 259 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 260 reconfigure = avdtp_subevent_signaling_media_codec_other_configuration_get_reconfigure(packet) != 0; 261 // accept configure if not configured and reconfigure if already configured 262 if (a2dp_sink_stream_endpoint_configured != reconfigure) break; 263 a2dp_sink_stream_endpoint_configured = true; 264 a2dp_sink_cid = avdtp_subevent_signaling_media_codec_other_capability_get_avdtp_cid(packet); 265 subevent_id = a2dp_subevent_id_for_avdtp_subevent_id(packet[2]); 266 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, subevent_id); 267 break; 268 269 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 270 if (a2dp_sink_stream_endpoint_configured == false) break; 271 if (a2dp_sink_cid != avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet)) break; 272 273 // about to notify client 274 a2dp_sink_outgoing_active = false; 275 status = avdtp_subevent_streaming_connection_established_get_status(packet); 276 if (status != ERROR_CODE_SUCCESS){ 277 log_info("A2DP sink streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", a2dp_sink_cid, status); 278 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 279 break; 280 } 281 282 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", a2dp_sink_cid, 283 avdtp_subevent_streaming_connection_established_get_local_seid(packet), 284 avdtp_subevent_streaming_connection_established_get_remote_seid(packet)); 285 286 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_ESTABLISHED); 287 break; 288 289 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 290 if (a2dp_sink_stream_endpoint_configured == false) break; 291 if (a2dp_sink_cid != avdtp_subevent_signaling_accept_get_avdtp_cid(packet)) break; 292 293 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 294 local_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 295 296 switch (signal_identifier){ 297 case AVDTP_SI_START: 298 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, a2dp_sink_cid, local_seid, A2DP_SUBEVENT_STREAM_STARTED); 299 break; 300 case AVDTP_SI_SUSPEND: 301 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, a2dp_sink_cid, local_seid, A2DP_SUBEVENT_STREAM_SUSPENDED); 302 break; 303 case AVDTP_SI_ABORT: 304 case AVDTP_SI_CLOSE: 305 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, a2dp_sink_cid, local_seid, A2DP_SUBEVENT_STREAM_STOPPED); 306 break; 307 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 308 case AVDTP_SI_ACCEPT_START: 309 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, a2dp_sink_cid, local_seid, A2DP_SUBEVENT_START_STREAM_REQUESTED); 310 break; 311 #endif 312 default: 313 break; 314 } 315 break; 316 317 case AVDTP_SUBEVENT_SIGNALING_REJECT: 318 if (a2dp_sink_stream_endpoint_configured == false) break; 319 if (a2dp_sink_cid != avdtp_subevent_signaling_reject_get_avdtp_cid(packet)) break; 320 321 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 322 break; 323 324 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 325 if (a2dp_sink_stream_endpoint_configured == false) break; 326 if (a2dp_sink_cid != avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet)) break; 327 328 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 329 break; 330 331 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 332 if (a2dp_sink_stream_endpoint_configured == false) break; 333 if (a2dp_sink_cid != avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)) break; 334 335 a2dp_sink_stream_endpoint_configured = false; 336 337 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 338 break; 339 340 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 341 if (a2dp_sink_cid != avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet)) break; 342 343 a2dp_sink_stream_endpoint_configured = false; 344 a2dp_sink_outgoing_active = false; 345 346 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 347 break; 348 default: 349 break; 350 } 351 352 } 353 354 static uint8_t a2dp_sink_media_config_validator_callback(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size){ 355 uint8_t error = 0; 356 if (a2dp_sink_media_config_validator != NULL) { 357 // update subevent id and call validator 358 uint8_t avdtp_subevent_id = event[2]; 359 uint8_t a2dp_subevent_id = a2dp_subevent_id_for_avdtp_subevent_id(avdtp_subevent_id); 360 uint8_t * subevent_field = (uint8_t *) &event[2]; 361 *subevent_field = a2dp_subevent_id; 362 error = (*a2dp_sink_media_config_validator)(stream_endpoint, event, size); 363 *subevent_field = avdtp_subevent_id; 364 } 365 return error; 366 } 367 368 void a2dp_sink_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size)){ 369 a2dp_sink_media_config_validator = callback; 370 avdtp_sink_register_media_config_validator(&a2dp_sink_media_config_validator_callback); 371 } 372