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)(avdtp_stream_endpoint_t * stream_endpoint, 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 avdtp_stream_endpoint_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){ 167 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_sink_create_stream_endpoint(AVDTP_SINK, media_type); 168 if (!local_stream_endpoint){ 169 return NULL; 170 } 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; 176 177 return local_stream_endpoint; 178 } 179 180 uint8_t a2dp_sink_establish_stream(bd_addr_t bd_addr, uint8_t local_seid, uint16_t * avdtp_cid){ 181 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_sink_context); 182 if (!sc.local_stream_endpoint){ 183 log_error(" no local_stream_endpoint for seid %d", local_seid); 184 return AVDTP_SEID_DOES_NOT_EXIST; 185 } 186 return avdtp_sink_connect(bd_addr, avdtp_cid); 187 } 188 189 void a2dp_sink_disconnect(uint16_t a2dp_cid){ 190 avdtp_disconnect(a2dp_cid, &a2dp_sink_context); 191 } 192 193 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 194 if (!callback) return; 195 if (event_size < 18) return; 196 event[0] = HCI_EVENT_A2DP_META; 197 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 198 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 199 } 200 201 static inline void avdtp_signaling_emit_media_codec_other(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 202 if (!callback) return; 203 if (event_size < 113) return; 204 event[0] = HCI_EVENT_A2DP_META; 205 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION; 206 } 207 208 static inline void a2dp_emit_stream_event(btstack_packet_handler_t callback, uint16_t a2dp_cid, uint8_t eventID, uint8_t local_seid){ 209 if (!callback) return; 210 uint8_t event[6]; 211 int pos = 0; 212 event[pos++] = HCI_EVENT_A2DP_META; 213 event[pos++] = sizeof(event) - 2; 214 event[pos++] = eventID; 215 little_endian_store_16(event, pos, a2dp_cid); 216 pos += 2; 217 event[pos++] = local_seid; 218 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 219 } 220 221 static inline void a2dp_emit_cmd_accepted(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 222 if (!callback) return; 223 UNUSED(size); 224 packet[2] = A2DP_SUBEVENT_COMMAND_ACCEPTED; 225 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 226 } 227 228 static inline void a2dp_emit_cmd_rejected(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 229 if (!callback) return; 230 UNUSED(size); 231 packet[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 232 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 233 } 234 235 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 236 UNUSED(channel); 237 UNUSED(size); 238 bd_addr_t address; 239 uint8_t status; 240 uint8_t signal_identifier; 241 uint16_t cid; 242 uint8_t loc_seid; 243 uint8_t rem_seid; 244 245 if (packet_type != HCI_EVENT_PACKET) return; 246 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 247 248 switch (packet[2]){ 249 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 250 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 251 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 252 status = avdtp_subevent_signaling_connection_established_get_status(packet); 253 if (status != 0){ 254 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 255 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, 0, 0, status); 256 break; 257 } 258 app_state = A2DP_CONNECTED; 259 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", cid); 260 break; 261 262 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 263 log_info("received non SBC codec. not implemented"); 264 avdtp_signaling_emit_media_codec_other(a2dp_sink_context.a2dp_callback, packet, size); 265 break; 266 267 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 268 if (app_state < A2DP_CONNECTED) return; 269 a2dp_signaling_emit_media_codec_sbc(a2dp_sink_context.a2dp_callback, packet, size); 270 break; 271 272 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 273 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 274 status = avdtp_subevent_streaming_connection_established_get_status(packet); 275 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 276 loc_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 277 rem_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 278 279 if (status != 0){ 280 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, loc_seid, rem_seid, status); 281 break; 282 } 283 app_state = A2DP_STREAMING_OPENED; 284 a2dp_streaming_emit_connection_established(a2dp_sink_context.a2dp_callback, cid, address, loc_seid, rem_seid, 0); 285 break; 286 287 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 288 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 289 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 290 loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 291 292 switch (signal_identifier){ 293 case AVDTP_SI_START: 294 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_STARTED, loc_seid); 295 break; 296 case AVDTP_SI_SUSPEND: 297 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_SUSPENDED, loc_seid); 298 break; 299 case AVDTP_SI_ABORT: 300 case AVDTP_SI_CLOSE: 301 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, loc_seid); 302 break; 303 default: 304 a2dp_emit_cmd_accepted(a2dp_sink_context.a2dp_callback, packet, size); 305 break; 306 } 307 break; 308 309 case AVDTP_SUBEVENT_SIGNALING_REJECT: 310 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 311 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 312 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 313 loc_seid = avdtp_subevent_signaling_accept_get_local_seid(packet); 314 a2dp_emit_cmd_rejected(a2dp_sink_context.a2dp_callback, packet, size); 315 break; 316 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED: 317 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 318 loc_seid = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 319 app_state = A2DP_IDLE; 320 a2dp_emit_stream_event(a2dp_sink_context.a2dp_callback, cid, A2DP_SUBEVENT_STREAM_RELEASED, loc_seid); 321 break; 322 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 323 app_state = A2DP_IDLE; 324 break; 325 default: 326 app_state = A2DP_IDLE; 327 log_info("not implemented"); 328 break; 329 } 330 331 } 332 333