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 "classic/avdtp_util.h" 47 #include "classic/avdtp_sink.h" 48 #include "classic/a2dp_sink.h" 49 50 static const char * default_a2dp_sink_service_name = "BTstack A2DP Sink Service"; 51 static const char * default_a2dp_sink_service_provider_name = "BTstack A2DP Sink Service Provider"; 52 53 static avdtp_context_t a2dp_sink_context; 54 55 static a2dp_state_t app_state = A2DP_IDLE; 56 static avdtp_stream_endpoint_context_t sc; 57 58 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 59 60 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){ 61 uint8_t* attribute; 62 de_create_sequence(service); 63 64 // 0x0000 "Service Record Handle" 65 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 66 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 67 68 // 0x0001 "Service Class ID List" 69 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 70 attribute = de_push_sequence(service); 71 { 72 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SINK); 73 } 74 de_pop_sequence(service, attribute); 75 76 // 0x0004 "Protocol Descriptor List" 77 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 78 attribute = de_push_sequence(service); 79 { 80 uint8_t* l2cpProtocol = de_push_sequence(attribute); 81 { 82 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 83 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 84 } 85 de_pop_sequence(attribute, l2cpProtocol); 86 87 uint8_t* avProtocol = de_push_sequence(attribute); 88 { 89 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 90 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 91 } 92 de_pop_sequence(attribute, avProtocol); 93 } 94 de_pop_sequence(service, attribute); 95 96 // 0x0005 "Public Browse Group" 97 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 98 attribute = de_push_sequence(service); 99 { 100 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 101 } 102 de_pop_sequence(service, attribute); 103 104 // 0x0009 "Bluetooth Profile Descriptor List" 105 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 106 attribute = de_push_sequence(service); 107 { 108 uint8_t *a2dProfile = de_push_sequence(attribute); 109 { 110 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 111 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 112 } 113 de_pop_sequence(attribute, a2dProfile); 114 } 115 de_pop_sequence(service, attribute); 116 117 118 // 0x0100 "Service Name" 119 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 120 if (service_name){ 121 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 122 } else { 123 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_name), (uint8_t *) default_a2dp_sink_service_name); 124 } 125 126 // 0x0100 "Provider Name" 127 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 128 if (service_provider_name){ 129 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 130 } else { 131 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_provider_name), (uint8_t *) default_a2dp_sink_service_provider_name); 132 } 133 134 // 0x0311 "Supported Features" 135 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 136 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 137 } 138 139 void a2dp_sink_register_packet_handler(btstack_packet_handler_t callback){ 140 // avdtp_sink_register_packet_handler(callback); 141 // return; 142 if (callback == NULL){ 143 log_error("a2dp_sink_register_packet_handler called with NULL callback"); 144 return; 145 } 146 avdtp_sink_register_packet_handler(&packet_handler); 147 a2dp_sink_context.a2dp_callback = callback; 148 } 149 150 void a2dp_sink_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 151 if (callback == NULL){ 152 log_error("a2dp_sink_register_media_handler called with NULL callback"); 153 return; 154 } 155 avdtp_sink_register_media_handler(callback); 156 } 157 158 void a2dp_sink_init(void){ 159 avdtp_sink_init(&a2dp_sink_context); 160 } 161 162 uint8_t a2dp_sink_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 163 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 164 uint8_t * media_codec_info, uint16_t media_codec_info_len, uint8_t * local_seid){ 165 *local_seid = 0; 166 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); 167 if (!local_stream_endpoint){ 168 return BTSTACK_MEMORY_ALLOC_FAILED; 169 } 170 *local_seid = avdtp_local_seid(local_stream_endpoint); 171 avdtp_sink_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 172 avdtp_sink_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 173 codec_capabilities, codec_capabilities_len); 174 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 175 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 176 return ERROR_CODE_SUCCESS; 177 } 178 179 uint8_t a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid, uint16_t * avdtp_cid){ 180 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_sink_context); 181 if (!sc.local_stream_endpoint){ 182 log_info("No local_stream_endpoint for seid %d", local_seid); 183 return AVDTP_SEID_DOES_NOT_EXIST; 184 } 185 return avdtp_sink_connect(bd_addr, avdtp_cid); 186 } 187 188 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 189 avdtp_disconnect(a2dp_cid, &a2dp_sink_context); 190 } 191 192 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 193 if (!callback) return; 194 if (event_size < 18) return; 195 event[0] = HCI_EVENT_A2DP_META; 196 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 197 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 198 } 199 200 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 201 if (!callback) return; 202 if (event_size < 113) return; 203 event[0] = HCI_EVENT_A2DP_META; 204 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 205 } 206 207 static inline void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t a2dp_cid, uint8_t eventID, uint8_t local_seid){ 208 if (!callback) return; 209 uint8_t event[6]; 210 int pos = 0; 211 event[pos++] = HCI_EVENT_A2DP_META; 212 event[pos++] = sizeof(event) - 2; 213 event[pos++] = eventID; 214 little_endian_store_16(event, pos, a2dp_cid); 215 pos += 2; 216 event[pos++] = local_seid; 217 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 218 } 219 220 static inline void a2dp_emit_signaling_connection_released(btstack_packet_handler_t callback, uint16_t a2dp_cid){ 221 if (!callback) return; 222 uint8_t event[5]; 223 int pos = 0; 224 event[pos++] = HCI_EVENT_A2DP_META; 225 event[pos++] = sizeof(event) - 2; 226 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 227 little_endian_store_16(event, pos, a2dp_cid); 228 pos += 2; 229 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 230 } 231 232 // static inline void a2dp_emit_cmd_accepted(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 233 // if (!callback) return; 234 // UNUSED(size); 235 // packet[0] = HCI_EVENT_A2DP_META; 236 // packet[2] = A2DP_SUBEVENT_COMMAND_ACCEPTED; 237 // (*callback)(HCI_EVENT_PACKET, 0, packet, size); 238 // } 239 240 static inline void a2dp_emit_cmd_rejected(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 241 if (!callback) return; 242 UNUSED(size); 243 packet[0] = HCI_EVENT_A2DP_META; 244 packet[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 245 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 246 } 247 248 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 249 UNUSED(channel); 250 UNUSED(size); 251 bd_addr_t address; 252 uint8_t status; 253 uint8_t signal_identifier; 254 uint16_t cid; 255 uint8_t loc_seid; 256 uint8_t rem_seid; 257 258 if (packet_type != HCI_EVENT_PACKET) return; 259 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 260 261 switch (packet[2]){ 262 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 263 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 264 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 265 status = avdtp_subevent_signaling_connection_established_get_status(packet); 266 if (status != 0){ 267 app_state = A2DP_IDLE; 268 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 269 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, 0, 0, status); 270 break; 271 } 272 app_state = A2DP_CONNECTED; 273 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", cid); 274 break; 275 276 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 277 log_info("received non SBC codec. not implemented"); 278 avdtp_signaling_emit_media_codec_other(a2dp_sink_context.a2dp_callback, packet, size); 279 break; 280 281 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 282 if (app_state < A2DP_CONNECTED) return; 283 a2dp_signaling_emit_media_codec_sbc(a2dp_sink_context.a2dp_callback, packet, size); 284 break; 285 286 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 287 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 288 status = avdtp_subevent_streaming_connection_established_get_status(packet); 289 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 290 loc_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 291 rem_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 292 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x, status %d ---", cid, status); 293 294 if (status != 0){ 295 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, loc_seid, rem_seid, status); 296 break; 297 } 298 app_state = A2DP_STREAMING_OPENED; 299 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, loc_seid, rem_seid, 0); 300 break; 301 302 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 303 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 304 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 305 loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 306 307 switch (signal_identifier){ 308 case AVDTP_SI_START: 309 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, loc_seid); 310 break; 311 case AVDTP_SI_SUSPEND: 312 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, loc_seid); 313 break; 314 case AVDTP_SI_ABORT: 315 case AVDTP_SI_CLOSE: 316 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STOPPED, loc_seid); 317 break; 318 default: 319 // a2dp_emit_cmd_accepted(a2dp_sink_context.a2dp_callback, packet, size); 320 break; 321 } 322 break; 323 324 case AVDTP_SUBEVENT_SIGNALING_REJECT: 325 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 326 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 327 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 328 loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 329 a2dp_emit_cmd_rejected(a2dp_sink_context.a2dp_callback, packet, size); 330 app_state = A2DP_IDLE; 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