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 bool outgoing_active = false; 56 static uint16_t a2dp_sink_cid; 57 static bool stream_endpoint_configured = false; 58 59 static avdtp_stream_endpoint_context_t sc; 60 61 static btstack_packet_handler_t a2dp_sink_packet_handler_user; 62 63 static void a2dp_sink_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 64 65 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){ 66 uint8_t* attribute; 67 de_create_sequence(service); 68 69 // 0x0000 "Service Record Handle" 70 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 71 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 72 73 // 0x0001 "Service Class ID List" 74 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 75 attribute = de_push_sequence(service); 76 { 77 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SINK); 78 } 79 de_pop_sequence(service, attribute); 80 81 // 0x0004 "Protocol Descriptor List" 82 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 83 attribute = de_push_sequence(service); 84 { 85 uint8_t* l2cpProtocol = de_push_sequence(attribute); 86 { 87 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 88 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 89 } 90 de_pop_sequence(attribute, l2cpProtocol); 91 92 uint8_t* avProtocol = de_push_sequence(attribute); 93 { 94 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 95 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 96 } 97 de_pop_sequence(attribute, avProtocol); 98 } 99 de_pop_sequence(service, attribute); 100 101 // 0x0005 "Public Browse Group" 102 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 103 attribute = de_push_sequence(service); 104 { 105 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 106 } 107 de_pop_sequence(service, attribute); 108 109 // 0x0009 "Bluetooth Profile Descriptor List" 110 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 111 attribute = de_push_sequence(service); 112 { 113 uint8_t *a2dProfile = de_push_sequence(attribute); 114 { 115 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 116 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 117 } 118 de_pop_sequence(attribute, a2dProfile); 119 } 120 de_pop_sequence(service, attribute); 121 122 123 // 0x0100 "Service Name" 124 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 125 if (service_name){ 126 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 127 } else { 128 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_name), (uint8_t *) default_a2dp_sink_service_name); 129 } 130 131 // 0x0100 "Provider Name" 132 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 133 if (service_provider_name){ 134 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 135 } else { 136 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_provider_name), (uint8_t *) default_a2dp_sink_service_provider_name); 137 } 138 139 // 0x0311 "Supported Features" 140 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 141 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 142 } 143 144 void a2dp_sink_register_packet_handler(btstack_packet_handler_t callback){ 145 // avdtp_sink_register_packet_handler(callback); 146 // return; 147 if (callback == NULL){ 148 log_error("a2dp_sink_register_packet_handler called with NULL callback"); 149 return; 150 } 151 avdtp_sink_register_packet_handler(&a2dp_sink_packet_handler_internal); 152 a2dp_sink_packet_handler_user = callback; 153 } 154 155 void a2dp_sink_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 156 if (callback == NULL){ 157 log_error("a2dp_sink_register_media_handler called with NULL callback"); 158 return; 159 } 160 avdtp_sink_register_media_handler(callback); 161 } 162 163 void a2dp_sink_init(void){ 164 avdtp_sink_init(); 165 } 166 167 avdtp_stream_endpoint_t * a2dp_sink_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 168 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 169 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 170 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); 171 if (!local_stream_endpoint){ 172 return NULL; 173 } 174 avdtp_sink_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 175 avdtp_sink_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 176 codec_capabilities, codec_capabilities_len); 177 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 178 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 179 avdtp_sink_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 180 return local_stream_endpoint; 181 } 182 183 void a2dp_sink_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 184 avdtp_sink_finalize_stream_endpoint(stream_endpoint); 185 } 186 187 uint8_t a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid, uint16_t * avdtp_cid){ 188 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 189 if (!sc.local_stream_endpoint){ 190 log_info("No local_stream_endpoint for seid %d", local_seid); 191 return ERROR_CODE_COMMAND_DISALLOWED; 192 } 193 // remember to tell client 194 outgoing_active = true; 195 return avdtp_sink_connect(bd_addr, avdtp_cid); 196 } 197 198 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 199 avdtp_disconnect(a2dp_cid); 200 } 201 202 static void a2dp_sink_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 203 UNUSED(channel); 204 UNUSED(size); 205 bd_addr_t address; 206 uint16_t cid; 207 uint8_t status; 208 209 uint8_t local_seid; 210 uint8_t remote_seid; 211 uint8_t signal_identifier; 212 213 if (packet_type != HCI_EVENT_PACKET) return; 214 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 215 216 switch (packet[2]){ 217 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 218 if (stream_endpoint_configured) return; 219 220 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 221 222 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 223 status = avdtp_subevent_signaling_connection_established_get_status(packet); 224 if (status != ERROR_CODE_SUCCESS){ 225 // only care for outgoing connections 226 if (!outgoing_active) break; 227 outgoing_active = false; 228 a2dp_emit_signaling_connection_established(a2dp_sink_packet_handler_user, packet, size, status); 229 log_info("A2DP sink signaling connection failed status %d", status); 230 break; 231 } 232 233 a2dp_emit_signaling_connection_established(a2dp_sink_packet_handler_user, packet, size, status); 234 log_info("A2DP sink signaling connection established avdtp_cid 0x%02x", cid); 235 break; 236 237 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 238 if (stream_endpoint_configured) break; 239 stream_endpoint_configured = true; 240 a2dp_sink_cid = avdtp_subevent_signaling_media_codec_other_capability_get_avdtp_cid(packet); 241 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION); 242 break; 243 244 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 245 if (stream_endpoint_configured) break; 246 stream_endpoint_configured = true; 247 a2dp_sink_cid = avdtp_subevent_signaling_media_codec_other_capability_get_avdtp_cid(packet); 248 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION); 249 break; 250 251 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 252 if (stream_endpoint_configured == false) break; 253 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 254 if (cid != a2dp_sink_cid) break; 255 256 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 257 258 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 259 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 260 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 261 262 // about to notify client 263 outgoing_active = false; 264 status = avdtp_subevent_streaming_connection_established_get_status(packet); 265 if (status != ERROR_CODE_SUCCESS){ 266 log_info("A2DP sink streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 267 a2dp_emit_streaming_connection_established(a2dp_sink_packet_handler_user, packet, size, status); 268 break; 269 } 270 271 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 272 a2dp_emit_streaming_connection_established(a2dp_sink_packet_handler_user, packet, size, status); 273 break; 274 275 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 276 if (stream_endpoint_configured == false) break; 277 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 278 if (cid != a2dp_sink_cid) break; 279 280 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 281 local_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 282 283 switch (signal_identifier){ 284 case AVDTP_SI_START: 285 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, cid, local_seid, A2DP_SUBEVENT_STREAM_STARTED); 286 break; 287 case AVDTP_SI_SUSPEND: 288 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, cid, local_seid, A2DP_SUBEVENT_STREAM_SUSPENDED); 289 break; 290 case AVDTP_SI_ABORT: 291 case AVDTP_SI_CLOSE: 292 a2dp_emit_stream_event(a2dp_sink_packet_handler_user, cid, local_seid, A2DP_SUBEVENT_STREAM_STOPPED); 293 break; 294 default: 295 break; 296 } 297 break; 298 299 case AVDTP_SUBEVENT_SIGNALING_REJECT: 300 if (stream_endpoint_configured == false) break; 301 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 302 if (cid != a2dp_sink_cid) break; 303 304 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 305 break; 306 307 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 308 if (stream_endpoint_configured == false) break; 309 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 310 if (cid != a2dp_sink_cid) break; 311 312 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_COMMAND_REJECTED); 313 break; 314 315 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 316 if (stream_endpoint_configured == false) break; 317 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 318 if (cid != a2dp_sink_cid) break; 319 320 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_STREAM_RELEASED); 321 break; 322 323 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 324 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 325 if (cid != a2dp_sink_cid) break; 326 327 stream_endpoint_configured = false; 328 // for outgoing connections, suppress release event and report stream established failed 329 if (outgoing_active){ 330 outgoing_active = false; 331 log_info("A2DP sink outgoing connection failed - disconnect"); 332 a2dp_emit_signaling_connection_established(a2dp_sink_packet_handler_user, packet, size, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 333 break; 334 } 335 336 a2dp_replace_subevent_id_and_emit_cmd(a2dp_sink_packet_handler_user, packet, size, A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED); 337 break; 338 default: 339 break; 340 } 341 342 } 343 344