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 <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "avdtp.h" 47 #include "avdtp_util.h" 48 #include "avdtp_sink.h" 49 #include "a2dp_sink.h" 50 51 static const char * default_a2dp_sink_service_name = "BTstack A2DP Sink Service"; 52 static const char * default_a2dp_sink_service_provider_name = "BTstack A2DP Sink Service Provider"; 53 54 static avdtp_context_t a2dp_sink_context; 55 56 static a2dp_state_t app_state = A2DP_IDLE; 57 static avdtp_stream_endpoint_context_t sc; 58 59 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 60 61 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){ 62 uint8_t* attribute; 63 de_create_sequence(service); 64 65 // 0x0000 "Service Record Handle" 66 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 67 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 68 69 // 0x0001 "Service Class ID List" 70 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 71 attribute = de_push_sequence(service); 72 { 73 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SINK); 74 } 75 de_pop_sequence(service, attribute); 76 77 // 0x0004 "Protocol Descriptor List" 78 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 79 attribute = de_push_sequence(service); 80 { 81 uint8_t* l2cpProtocol = de_push_sequence(attribute); 82 { 83 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 84 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 85 } 86 de_pop_sequence(attribute, l2cpProtocol); 87 88 uint8_t* avProtocol = de_push_sequence(attribute); 89 { 90 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 91 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 92 } 93 de_pop_sequence(attribute, avProtocol); 94 } 95 de_pop_sequence(service, attribute); 96 97 // 0x0005 "Public Browse Group" 98 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 99 attribute = de_push_sequence(service); 100 { 101 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 102 } 103 de_pop_sequence(service, attribute); 104 105 // 0x0009 "Bluetooth Profile Descriptor List" 106 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 107 attribute = de_push_sequence(service); 108 { 109 uint8_t *a2dProfile = de_push_sequence(attribute); 110 { 111 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 112 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 113 } 114 de_pop_sequence(attribute, a2dProfile); 115 } 116 de_pop_sequence(service, attribute); 117 118 119 // 0x0100 "Service Name" 120 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 121 if (service_name){ 122 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 123 } else { 124 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_name), (uint8_t *) default_a2dp_sink_service_name); 125 } 126 127 // 0x0100 "Provider Name" 128 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 129 if (service_provider_name){ 130 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 131 } else { 132 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_provider_name), (uint8_t *) default_a2dp_sink_service_provider_name); 133 } 134 135 // 0x0311 "Supported Features" 136 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 137 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 138 } 139 140 void a2dp_sink_register_packet_handler(btstack_packet_handler_t callback){ 141 // avdtp_sink_register_packet_handler(callback); 142 // return; 143 if (callback == NULL){ 144 log_error("a2dp_sink_register_packet_handler called with NULL callback"); 145 return; 146 } 147 avdtp_sink_register_packet_handler(&packet_handler); 148 a2dp_sink_context.a2dp_callback = callback; 149 } 150 151 void a2dp_sink_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 152 if (callback == NULL){ 153 log_error("a2dp_sink_register_media_handler called with NULL callback"); 154 return; 155 } 156 avdtp_sink_register_media_handler(callback); 157 } 158 159 void a2dp_sink_init(void){ 160 avdtp_sink_init(&a2dp_sink_context); 161 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 162 } 163 164 uint8_t a2dp_sink_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 165 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 166 uint8_t * media_codec_info, uint16_t media_codec_info_len, uint8_t * local_seid){ 167 *local_seid = 0; 168 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); 169 if (!local_stream_endpoint){ 170 return BTSTACK_MEMORY_ALLOC_FAILED; 171 } 172 *local_seid = avdtp_local_seid(local_stream_endpoint); 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 return ERROR_CODE_SUCCESS; 179 } 180 181 uint8_t a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid, uint16_t * avdtp_cid){ 182 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_sink_context); 183 if (!sc.local_stream_endpoint){ 184 log_info("No local_stream_endpoint for seid %d", local_seid); 185 return AVDTP_SEID_DOES_NOT_EXIST; 186 } 187 return avdtp_sink_connect(bd_addr, avdtp_cid); 188 } 189 190 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 191 avdtp_disconnect(a2dp_cid, &a2dp_sink_context); 192 } 193 194 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 195 if (!callback) return; 196 if (event_size < 18) return; 197 event[0] = HCI_EVENT_A2DP_META; 198 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 199 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 200 } 201 202 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 203 if (!callback) return; 204 if (event_size < 113) return; 205 event[0] = HCI_EVENT_A2DP_META; 206 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 207 } 208 209 static inline void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t a2dp_cid, uint8_t eventID, uint8_t local_seid){ 210 if (!callback) return; 211 uint8_t event[6]; 212 int pos = 0; 213 event[pos++] = HCI_EVENT_A2DP_META; 214 event[pos++] = sizeof(event) - 2; 215 event[pos++] = eventID; 216 little_endian_store_16(event, pos, a2dp_cid); 217 pos += 2; 218 event[pos++] = local_seid; 219 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 220 } 221 222 static inline void a2dp_emit_signaling_connection_released(btstack_packet_handler_t callback, uint16_t a2dp_cid){ 223 if (!callback) return; 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 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 232 } 233 234 // static inline void a2dp_emit_cmd_accepted(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 235 // if (!callback) return; 236 // UNUSED(size); 237 // packet[0] = HCI_EVENT_A2DP_META; 238 // packet[2] = A2DP_SUBEVENT_COMMAND_ACCEPTED; 239 // (*callback)(HCI_EVENT_PACKET, 0, packet, size); 240 // } 241 242 static inline void a2dp_emit_cmd_rejected(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 243 if (!callback) return; 244 UNUSED(size); 245 packet[0] = HCI_EVENT_A2DP_META; 246 packet[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 247 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 248 } 249 250 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 251 UNUSED(channel); 252 UNUSED(size); 253 bd_addr_t address; 254 uint8_t status; 255 uint8_t signal_identifier; 256 uint16_t cid; 257 uint8_t loc_seid; 258 uint8_t rem_seid; 259 260 if (packet_type != HCI_EVENT_PACKET) return; 261 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 262 263 switch (packet[2]){ 264 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 265 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 266 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 267 status = avdtp_subevent_signaling_connection_established_get_status(packet); 268 if (status != 0){ 269 app_state = A2DP_IDLE; 270 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 271 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, 0, 0, status); 272 break; 273 } 274 app_state = A2DP_CONNECTED; 275 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", cid); 276 break; 277 278 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 279 log_info("received non SBC codec. not implemented"); 280 avdtp_signaling_emit_media_codec_other(a2dp_sink_context.a2dp_callback, packet, size); 281 break; 282 283 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 284 if (app_state < A2DP_CONNECTED) return; 285 a2dp_signaling_emit_media_codec_sbc(a2dp_sink_context.a2dp_callback, packet, size); 286 break; 287 288 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 289 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 290 status = avdtp_subevent_streaming_connection_established_get_status(packet); 291 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 292 loc_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 293 rem_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 294 295 if (status != 0){ 296 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, loc_seid, rem_seid, status); 297 break; 298 } 299 app_state = A2DP_STREAMING_OPENED; 300 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, loc_seid, rem_seid, 0); 301 break; 302 303 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 304 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 305 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 306 loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 307 308 switch (signal_identifier){ 309 case AVDTP_SI_START: 310 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, loc_seid); 311 break; 312 case AVDTP_SI_SUSPEND: 313 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, loc_seid); 314 break; 315 case AVDTP_SI_ABORT: 316 case AVDTP_SI_CLOSE: 317 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STOPPED, loc_seid); 318 break; 319 default: 320 // a2dp_emit_cmd_accepted(a2dp_sink_context.a2dp_callback, packet, size); 321 break; 322 } 323 break; 324 325 case AVDTP_SUBEVENT_SIGNALING_REJECT: 326 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 327 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 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(a2dp_sink_context.a2dp_callback, packet, size); 331 break; 332 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 333 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 334 loc_seid = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 335 app_state = A2DP_IDLE; 336 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, loc_seid); 337 break; 338 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 339 cid = avdtp_subevent_signaling_connection_released_get_avdtp_cid(packet); 340 a2dp_emit_signaling_connection_released(a2dp_sink_context.a2dp_callback, cid); 341 app_state = A2DP_IDLE; 342 break; 343 default: 344 app_state = A2DP_IDLE; 345 log_info("not implemented"); 346 break; 347 } 348 349 } 350 351