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 static uint16_t avdtp_cid = 0; 59 // static int next_remote_sep_index_to_query = 0; 60 61 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 62 63 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){ 64 uint8_t* attribute; 65 de_create_sequence(service); 66 67 // 0x0000 "Service Record Handle" 68 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 69 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 70 71 // 0x0001 "Service Class ID List" 72 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 73 attribute = de_push_sequence(service); 74 { 75 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SINK); 76 } 77 de_pop_sequence(service, attribute); 78 79 // 0x0004 "Protocol Descriptor List" 80 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 81 attribute = de_push_sequence(service); 82 { 83 uint8_t* l2cpProtocol = de_push_sequence(attribute); 84 { 85 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 86 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 87 } 88 de_pop_sequence(attribute, l2cpProtocol); 89 90 uint8_t* avProtocol = de_push_sequence(attribute); 91 { 92 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 93 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 94 } 95 de_pop_sequence(attribute, avProtocol); 96 } 97 de_pop_sequence(service, attribute); 98 99 // 0x0005 "Public Browse Group" 100 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 101 attribute = de_push_sequence(service); 102 { 103 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 104 } 105 de_pop_sequence(service, attribute); 106 107 // 0x0009 "Bluetooth Profile Descriptor List" 108 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 109 attribute = de_push_sequence(service); 110 { 111 uint8_t *a2dProfile = de_push_sequence(attribute); 112 { 113 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 114 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 115 } 116 de_pop_sequence(attribute, a2dProfile); 117 } 118 de_pop_sequence(service, attribute); 119 120 121 // 0x0100 "Service Name" 122 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 123 if (service_name){ 124 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 125 } else { 126 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_name), (uint8_t *) default_a2dp_sink_service_name); 127 } 128 129 // 0x0100 "Provider Name" 130 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 131 if (service_provider_name){ 132 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 133 } else { 134 de_add_data(service, DE_STRING, strlen(default_a2dp_sink_service_provider_name), (uint8_t *) default_a2dp_sink_service_provider_name); 135 } 136 137 // 0x0311 "Supported Features" 138 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 139 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 140 } 141 142 void a2dp_sink_register_packet_handler(btstack_packet_handler_t callback){ 143 // avdtp_sink_register_packet_handler(callback); 144 // return; 145 if (callback == NULL){ 146 log_error("a2dp_sink_register_packet_handler called with NULL callback"); 147 return; 148 } 149 avdtp_sink_register_packet_handler(&packet_handler); 150 a2dp_sink_context.a2dp_callback = callback; 151 } 152 153 void a2dp_sink_register_media_handler(void (*callback)(avdtp_stream_endpoint_t * stream_endpoint, uint8_t *packet, uint16_t size)){ 154 if (callback == NULL){ 155 log_error("a2dp_sink_register_media_handler called with NULL callback"); 156 return; 157 } 158 avdtp_sink_register_media_handler(callback); 159 } 160 161 void a2dp_sink_init(void){ 162 avdtp_sink_init(&a2dp_sink_context); 163 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 164 } 165 166 uint8_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 avdtp_sink_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 171 avdtp_sink_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 172 codec_capabilities, codec_capabilities_len); 173 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 174 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 175 176 return local_stream_endpoint->sep.seid; 177 } 178 179 void a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid){ 180 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_sink_context); 181 if (!sc.local_stream_endpoint){ 182 log_error(" no local_stream_endpoint for seid %d", local_seid); 183 return; 184 } 185 avdtp_sink_connect(bd_addr); 186 } 187 188 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 189 avdtp_disconnect(a2dp_cid, &a2dp_sink_context); 190 } 191 192 static void a2dp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 193 if (!callback) return; 194 if (event_size < 8) return; 195 event[0] = HCI_EVENT_A2DP_META; 196 event[2] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 197 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 198 } 199 200 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 201 if (!callback) return; 202 if (event_size < 18) return; 203 event[0] = HCI_EVENT_A2DP_META; 204 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 205 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 206 } 207 208 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 209 if (!callback) return; 210 if (event_size < 112) return; 211 event[0] = HCI_EVENT_A2DP_META; 212 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 213 } 214 215 static inline void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t a2dp_cid, uint8_t eventID, uint8_t local_seid, uint8_t status){ 216 uint8_t event[7]; 217 int pos = 0; 218 event[pos++] = HCI_EVENT_A2DP_META; 219 event[pos++] = sizeof(event) - 2; 220 event[pos++] = eventID; 221 little_endian_store_16(event, pos, a2dp_cid); 222 pos += 2; 223 event[pos++] = local_seid; 224 event[pos++] = status; 225 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 226 227 } 228 229 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 230 UNUSED(channel); 231 UNUSED(size); 232 bd_addr_t event_addr; 233 uint8_t status; 234 uint8_t signal_identifier; 235 uint16_t cid; 236 uint8_t local_seid; 237 238 switch (packet_type) { 239 case HCI_EVENT_PACKET: 240 switch (hci_event_packet_get_type(packet)) { 241 case HCI_EVENT_PIN_CODE_REQUEST: 242 // inform about pin code request 243 printf("Pin code request - using '0000'\n"); 244 hci_event_pin_code_request_get_bd_addr(packet, event_addr); 245 hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000"); 246 break; 247 case HCI_EVENT_DISCONNECTION_COMPLETE: 248 // connection closed -> quit test app 249 app_state = A2DP_IDLE; 250 printf("\n --- a2dp sink: HCI_EVENT_DISCONNECTION_COMPLETE ---\n"); 251 break; 252 case HCI_EVENT_AVDTP_META: 253 switch (packet[2]){ 254 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 255 status = avdtp_subevent_signaling_connection_established_get_status(packet); 256 if (status != 0){ 257 log_info(" --- a2dp sink --- AVDTP_SUBEVENT_SIGNALING_CONNECTION could not be established, status %d ---", status); 258 break; 259 } 260 app_state = A2DP_CONNECTED; 261 avdtp_cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 262 log_info(" --- a2dp sink --- AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", avdtp_cid); 263 break; 264 265 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 266 log_info(" --- a2dp sink --- received non SBC codec. not implemented"); 267 avdtp_signaling_emit_media_codec_other(a2dp_sink_context.a2dp_callback, packet, size); 268 break; 269 270 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 271 if (app_state < A2DP_CONNECTED) return; 272 a2dp_signaling_emit_media_codec_sbc(a2dp_sink_context.a2dp_callback, packet, size); 273 break; 274 275 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 276 status = avdtp_subevent_streaming_connection_established_get_status(packet); 277 if (status != 0){ 278 app_state = A2DP_CONNECTED; 279 } else { 280 app_state = A2DP_STREAMING_OPENED; 281 } 282 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, packet, size); 283 break; 284 285 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 286 if (!a2dp_sink_context.a2dp_callback) return; 287 status = 0; 288 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 289 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 290 local_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 291 printf(" --- a2dp sink --- Accepted %d, a2dp sink cid 0x%2x, local seid %d\n", signal_identifier, cid, local_seid); 292 293 switch (signal_identifier){ 294 case AVDTP_SI_START: 295 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, local_seid, status); 296 break; 297 case AVDTP_SI_SUSPEND: 298 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, local_seid, status); 299 break; 300 case AVDTP_SI_ABORT: 301 case AVDTP_SI_CLOSE: 302 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, local_seid, status); 303 break; 304 default: 305 break; 306 } 307 break; 308 309 case AVDTP_SUBEVENT_SIGNALING_REJECT: 310 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 311 if (!a2dp_sink_context.a2dp_callback) return; 312 status = 1; 313 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 314 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 315 local_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 316 printf(" --- a2dp sink --- Rejected %d, a2dp sink cid 0x%2x, local seid %d\n", signal_identifier, cid, local_seid); 317 318 switch (signal_identifier){ 319 case AVDTP_SI_START: 320 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, local_seid, status); 321 break; 322 case AVDTP_SI_SUSPEND: 323 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, local_seid, status); 324 break; 325 case AVDTP_SI_ABORT: 326 case AVDTP_SI_CLOSE: 327 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, local_seid, status); 328 break; 329 default: 330 break; 331 } 332 break; 333 default: 334 app_state = A2DP_IDLE; 335 log_info(" --- a2dp sink --- not implemented"); 336 break; 337 } 338 break; 339 default: 340 break; 341 } 342 break; 343 default: 344 // other packet type 345 break; 346 } 347 } 348 349