1 2 /* 3 * Copyright (C) 2016 BlueKitchen GmbH 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 4. Any redistribution, use, or modification is done solely for 18 * personal benefit and not for any commercial purpose or for 19 * monetary gain. 20 * 21 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 25 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 28 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 31 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Please inquire about commercial licensing options at 35 * [email protected] 36 * 37 */ 38 39 #define __BTSTACK_FILE__ "a2dp_source.c" 40 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "btstack.h" 47 #include "avdtp.h" 48 #include "avdtp_util.h" 49 #include "avdtp_source.h" 50 #include "a2dp_source.h" 51 52 #define AVDTP_MEDIA_PAYLOAD_HEADER_SIZE 12 53 54 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 55 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 56 static avdtp_context_t a2dp_source_context; 57 58 static a2dp_state_t app_state = A2DP_IDLE; 59 static avdtp_stream_endpoint_context_t sc; 60 static int next_remote_sep_index_to_query = 0; 61 62 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 63 64 void a2dp_source_create_sdp_record(uint8_t * service, uint32_t service_record_handle, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 65 uint8_t* attribute; 66 de_create_sequence(service); 67 68 // 0x0000 "Service Record Handle" 69 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 70 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 71 72 // 0x0001 "Service Class ID List" 73 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 74 attribute = de_push_sequence(service); 75 { 76 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 77 } 78 de_pop_sequence(service, attribute); 79 80 // 0x0004 "Protocol Descriptor List" 81 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 82 attribute = de_push_sequence(service); 83 { 84 uint8_t* l2cpProtocol = de_push_sequence(attribute); 85 { 86 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 87 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 88 } 89 de_pop_sequence(attribute, l2cpProtocol); 90 91 uint8_t* avProtocol = de_push_sequence(attribute); 92 { 93 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 94 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 95 } 96 de_pop_sequence(attribute, avProtocol); 97 } 98 de_pop_sequence(service, attribute); 99 100 // 0x0005 "Public Browse Group" 101 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 102 attribute = de_push_sequence(service); 103 { 104 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 105 } 106 de_pop_sequence(service, attribute); 107 108 // 0x0009 "Bluetooth Profile Descriptor List" 109 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 110 attribute = de_push_sequence(service); 111 { 112 uint8_t *a2dProfile = de_push_sequence(attribute); 113 { 114 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 115 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 116 } 117 de_pop_sequence(attribute, a2dProfile); 118 } 119 de_pop_sequence(service, attribute); 120 121 122 // 0x0100 "Service Name" 123 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 124 if (service_name){ 125 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 126 } else { 127 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 128 } 129 130 // 0x0100 "Provider Name" 131 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 132 if (service_provider_name){ 133 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 134 } else { 135 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 136 } 137 138 // 0x0311 "Supported Features" 139 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 140 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 141 } 142 143 static inline uint16_t a2dp_cid(void){ 144 if (!sc.local_stream_endpoint) return 0; 145 if (!sc.local_stream_endpoint->connection) return 0; 146 return sc.local_stream_endpoint->connection->avdtp_cid; 147 } 148 149 static inline uint8_t local_seid(void){ 150 return avdtp_local_seid(sc.local_stream_endpoint); 151 } 152 153 static inline uint8_t remote_seid(void){ 154 return avdtp_remote_seid(sc.local_stream_endpoint); 155 } 156 157 static void a2dp_streaming_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t remote_seid, uint8_t status){ 158 if (!callback) return; 159 uint8_t event[8]; 160 int pos = 0; 161 event[pos++] = HCI_EVENT_A2DP_META; 162 event[pos++] = sizeof(event) - 2; 163 event[pos++] = A2DP_SUBEVENT_STREAM_ESTABLISHED; 164 little_endian_store_16(event, pos, cid); 165 pos += 2; 166 event[pos++] = local_seid; 167 event[pos++] = remote_seid; 168 event[pos++] = status; 169 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 170 } 171 172 static void a2dp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 173 if (!callback) return; 174 uint8_t event[8]; 175 int pos = 0; 176 event[pos++] = HCI_EVENT_A2DP_META; 177 event[pos++] = sizeof(event) - 2; 178 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 179 little_endian_store_16(event, pos, cid); 180 pos += 2; 181 event[pos++] = seid; 182 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 183 } 184 185 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 186 UNUSED(channel); 187 UNUSED(size); 188 189 uint8_t signal_identifier; 190 uint8_t status; 191 avdtp_sep_t sep; 192 uint8_t loc_seid; 193 uint8_t rem_seid; 194 uint16_t cid; 195 bd_addr_t address; 196 197 if (packet_type != HCI_EVENT_PACKET) return; 198 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 199 200 switch (packet[2]){ 201 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 202 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, address); 203 if (memcmp(address, &sc.remote_addr, 6) != 0) break; 204 205 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 206 status = avdtp_subevent_signaling_connection_established_get_status(packet); 207 if (status != 0){ 208 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 209 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, 0, 0, status); 210 break; 211 } 212 213 sc.active_remote_sep = NULL; 214 next_remote_sep_index_to_query = 0; 215 app_state = A2DP_W2_DISCOVER_SEPS; 216 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---", cid); 217 avdtp_source_discover_stream_endpoints(cid); 218 break; 219 220 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 221 // TODO check cid 222 if (app_state != A2DP_W2_DISCOVER_SEPS) return; 223 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet); 224 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 225 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 226 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 227 log_info("found sep: seid %u, in_use %d, media type %d, sep type %d (1-SNK)", sep.seid, sep.in_use, sep.media_type, sep.type); 228 break; 229 230 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 231 // TODO check cid 232 if (!sc.local_stream_endpoint) return; 233 uint8_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 234 uint8_t channel_mode = avdtp_choose_sbc_channel_mode(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 235 uint8_t block_length = avdtp_choose_sbc_block_length(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet)); 236 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 237 238 uint8_t allocation_method = avdtp_choose_sbc_allocation_method(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 239 uint8_t max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 240 uint8_t min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet)); 241 242 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 243 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 244 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 245 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 246 247 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 248 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 249 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 250 251 app_state = A2DP_W2_SET_CONFIGURATION; 252 break; 253 } 254 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 255 log_info("received non SBC codec. not implemented"); 256 break; 257 258 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 259 // TODO check cid 260 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 261 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 262 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 263 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet) - 1; 264 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 265 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 266 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 267 break; 268 } 269 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 270 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, a2dp_cid(), 0); 271 break; 272 273 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 274 status = avdtp_subevent_streaming_connection_established_get_status(packet); 275 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 276 277 if (cid != a2dp_cid()){ 278 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, a2dp_cid(), local_seid(), remote_seid(), ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 279 break; 280 } 281 282 loc_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 283 if (loc_seid != local_seid()){ 284 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, a2dp_cid(), local_seid(), remote_seid(), ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 285 break; 286 } 287 288 rem_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 289 if (status != 0){ 290 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, status %d ---", status); 291 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, a2dp_cid(), local_seid(), rem_seid, status); 292 break; 293 } 294 295 app_state = A2DP_STREAMING_OPENED; 296 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, a2dp_cid(), local_seid(), remote_seid(), 0); 297 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", a2dp_cid(), local_seid(), remote_seid()); 298 break; 299 300 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 301 // TODO check cid 302 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 303 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 304 log_info("Accepted %d", signal_identifier); 305 306 switch (app_state){ 307 case A2DP_W2_DISCOVER_SEPS: 308 app_state = A2DP_W2_GET_ALL_CAPABILITIES; 309 310 sc.active_remote_sep = avdtp_source_remote_sep(cid, next_remote_sep_index_to_query++); 311 if (!sc.active_remote_sep) { 312 app_state = A2DP_IDLE; 313 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, 0, 0, AVDTP_SEID_DOES_NOT_EXIST); 314 break; 315 } 316 log_info("Query get caps for seid %d", sc.active_remote_sep->seid); 317 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 318 break; 319 case A2DP_W2_GET_CAPABILITIES: 320 case A2DP_W2_GET_ALL_CAPABILITIES: 321 if (next_remote_sep_index_to_query < avdtp_source_remote_seps_num(cid)){ 322 sc.active_remote_sep = avdtp_source_remote_sep(cid, next_remote_sep_index_to_query++); 323 log_info("Query get caps for seid %d", sc.active_remote_sep->seid); 324 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 325 } else { 326 log_info("No more remote seps found"); 327 app_state = A2DP_IDLE; 328 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, 0, 0, AVDTP_SEID_DOES_NOT_EXIST); 329 } 330 break; 331 case A2DP_W2_SET_CONFIGURATION:{ 332 if (!sc.local_stream_endpoint) return; 333 app_state = A2DP_W2_GET_CONFIGURATION; 334 avdtp_source_set_configuration(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid, sc.local_stream_endpoint->remote_configuration_bitmap, sc.local_stream_endpoint->remote_configuration); 335 break; 336 } 337 case A2DP_W2_GET_CONFIGURATION: 338 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 339 avdtp_source_get_configuration(cid, sc.active_remote_sep->seid); 340 break; 341 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 342 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 343 btstack_sbc_encoder_init(&sc.sbc_encoder_state, SBC_MODE_STANDARD, 344 sc.block_length, sc.subbands, 345 sc.allocation_method, sc.sampling_frequency, 346 sc.max_bitpool_value, 347 sc.channel_mode); 348 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 349 break; 350 } 351 case A2DP_STREAMING_OPENED: 352 if (!a2dp_source_context.a2dp_callback) return; 353 switch (signal_identifier){ 354 case AVDTP_SI_START:{ 355 uint8_t event[6]; 356 int pos = 0; 357 event[pos++] = HCI_EVENT_A2DP_META; 358 event[pos++] = sizeof(event) - 2; 359 event[pos++] = A2DP_SUBEVENT_STREAM_STARTED; 360 little_endian_store_16(event, pos, a2dp_cid()); 361 pos += 2; 362 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 363 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 364 break; 365 } 366 case AVDTP_SI_SUSPEND:{ 367 uint8_t event[6]; 368 int pos = 0; 369 event[pos++] = HCI_EVENT_A2DP_META; 370 event[pos++] = sizeof(event) - 2; 371 event[pos++] = A2DP_SUBEVENT_STREAM_SUSPENDED; 372 little_endian_store_16(event, pos, a2dp_cid()); 373 pos += 2; 374 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 375 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 376 break; 377 } 378 case AVDTP_SI_ABORT: 379 case AVDTP_SI_CLOSE:{ 380 uint8_t event[6]; 381 int pos = 0; 382 event[pos++] = HCI_EVENT_A2DP_META; 383 event[pos++] = sizeof(event) - 2; 384 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 385 little_endian_store_16(event, pos, a2dp_cid()); 386 pos += 2; 387 log_info("send A2DP_SUBEVENT_STREAM_RELEASED to app"); 388 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 389 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 390 break; 391 } 392 default: 393 break; 394 } 395 break; 396 default: 397 app_state = A2DP_IDLE; 398 break; 399 } 400 401 break; 402 case AVDTP_SUBEVENT_SIGNALING_REJECT: 403 app_state = A2DP_IDLE; 404 signal_identifier = avdtp_subevent_signaling_reject_get_signal_identifier(packet); 405 log_info("Rejected %d", signal_identifier); 406 break; 407 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 408 app_state = A2DP_IDLE; 409 signal_identifier = avdtp_subevent_signaling_general_reject_get_signal_identifier(packet); 410 log_info("Rejected %d", signal_identifier); 411 break; 412 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 413 uint8_t event[6]; 414 int pos = 0; 415 event[pos++] = HCI_EVENT_AVDTP_META; 416 event[pos++] = sizeof(event) - 2; 417 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 418 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 419 pos += 2; 420 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 421 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 422 break; 423 } 424 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 425 break; 426 default: 427 app_state = A2DP_IDLE; 428 log_info("not implemented"); 429 break; 430 } 431 } 432 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 433 if (callback == NULL){ 434 log_error("a2dp_source_register_packet_handler called with NULL callback"); 435 return; 436 } 437 avdtp_source_register_packet_handler(&packet_handler); 438 a2dp_source_context.a2dp_callback = callback; 439 } 440 441 void a2dp_source_init(void){ 442 avdtp_source_init(&a2dp_source_context); 443 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 444 } 445 446 uint8_t a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 447 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 448 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 449 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 450 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 451 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 452 codec_capabilities, codec_capabilities_len); 453 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 454 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 455 456 return local_stream_endpoint->sep.seid; 457 } 458 459 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 460 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 461 if (!sc.local_stream_endpoint){ 462 log_error(" no local_stream_endpoint for seid %d", loc_seid); 463 return AVDTP_SEID_DOES_NOT_EXIST; 464 } 465 memcpy(sc.remote_addr, remote_addr, 6); 466 return avdtp_source_connect(remote_addr, avdtp_cid); 467 } 468 469 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 470 return avdtp_disconnect(avdtp_cid, &a2dp_source_context); 471 } 472 473 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 474 return avdtp_start_stream(avdtp_cid, local_seid, &a2dp_source_context); 475 } 476 477 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 478 return avdtp_suspend_stream(avdtp_cid, local_seid, &a2dp_source_context); 479 } 480 481 uint8_t a2dp_source_stream_endpoint_ready(uint16_t avdtp_cid, uint8_t local_seid){ 482 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 483 if (!stream_endpoint) { 484 log_error("No stream_endpoint with seid %d", local_seid); 485 return 0; 486 } 487 if (!stream_endpoint->connection || stream_endpoint->connection->avdtp_cid != avdtp_cid) return 0; 488 return (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING); 489 } 490 491 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 492 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 493 log_error("small outgoing buffer"); 494 return; 495 } 496 497 uint8_t rtp_version = 2; 498 uint8_t padding = 0; 499 uint8_t extension = 0; 500 uint8_t csrc_count = 0; 501 uint8_t payload_type = 0x60; 502 // uint16_t sequence_number = stream_endpoint->sequence_number; 503 uint32_t timestamp = btstack_run_loop_get_time_ms(); 504 uint32_t ssrc = 0x11223344; 505 506 // rtp header (min size 12B) 507 int pos = 0; 508 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 509 510 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 511 media_packet[pos++] = (marker << 1) | payload_type; 512 big_endian_store_16(media_packet, pos, sequence_number); 513 pos += 2; 514 big_endian_store_32(media_packet, pos, timestamp); 515 pos += 4; 516 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 517 pos += 4; 518 *offset = pos; 519 } 520 521 void a2dp_source_stream_endpoint_request_can_send_now(uint8_t local_seid){ 522 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 523 if (!stream_endpoint) { 524 log_error("no stream_endpoint for seid %d", local_seid); 525 return; 526 } 527 stream_endpoint->send_stream = 1; 528 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 529 } 530 531 int a2dp_max_media_payload_size(uint8_t local_seid){ 532 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 533 if (!stream_endpoint) { 534 log_error("no stream_endpoint found for seid %d", local_seid); 535 return 0; 536 } 537 if (stream_endpoint->l2cap_media_cid == 0){ 538 log_error("no media cid found for seid %d", local_seid); 539 return 0; 540 } 541 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 542 } 543 544 static void a2dp_source_copy_media_payload(uint8_t * media_packet, int size, int * offset, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames){ 545 if (size < num_bytes_to_copy + 1){ 546 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 547 return; 548 } 549 550 int pos = *offset; 551 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 552 memcpy(media_packet + pos, storage, num_bytes_to_copy); 553 pos += num_bytes_to_copy; 554 *offset = pos; 555 } 556 557 int a2dp_source_stream_send_media_payload(uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){ 558 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 559 if (!stream_endpoint) { 560 log_error("no stream_endpoint found for seid %d", local_seid); 561 return 0; 562 } 563 564 if (stream_endpoint->l2cap_media_cid == 0){ 565 log_error("no media cid found for seid %d", local_seid); 566 return 0; 567 } 568 569 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 570 int offset = 0; 571 572 l2cap_reserve_packet_buffer(); 573 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 574 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 575 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 576 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 577 stream_endpoint->sequence_number++; 578 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 579 return size; 580 } 581