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 "classic/avdtp.h" 48 #include "classic/avdtp_util.h" 49 #include "classic/avdtp_source.h" 50 #include "classic/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 61 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 62 63 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){ 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_SOURCE); 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_source_service_name), (uint8_t *) default_a2dp_source_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_source_service_provider_name), (uint8_t *) default_a2dp_source_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 } 141 142 143 static void a2dp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 144 if (!callback) return; 145 uint8_t event[8]; 146 int pos = 0; 147 event[pos++] = HCI_EVENT_A2DP_META; 148 event[pos++] = sizeof(event) - 2; 149 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 150 little_endian_store_16(event, pos, cid); 151 pos += 2; 152 event[pos++] = seid; 153 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 154 } 155 156 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 157 if (!callback) return; 158 if (event_size < 18) return; 159 event[0] = HCI_EVENT_A2DP_META; 160 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 161 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 162 } 163 164 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 165 UNUSED(channel); 166 UNUSED(size); 167 168 uint8_t signal_identifier; 169 uint8_t status; 170 uint8_t local_seid; 171 uint8_t remote_seid; 172 uint16_t cid; 173 bd_addr_t address; 174 175 if (packet_type != HCI_EVENT_PACKET) return; 176 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 177 178 switch (packet[2]){ 179 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 180 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 181 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 182 status = avdtp_subevent_signaling_connection_established_get_status(packet); 183 184 if (status != 0){ 185 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 186 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, 0, 0, status); 187 break; 188 } 189 190 sc.active_remote_sep = NULL; 191 sc.active_remote_sep_index = 0; 192 uint8_t event[11]; 193 int pos = 0; 194 event[pos++] = HCI_EVENT_A2DP_META; 195 event[pos++] = sizeof(event) - 2; 196 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 197 little_endian_store_16(event, pos, cid); 198 pos += 2; 199 reverse_bd_addr(event+pos, sc.remote_addr); 200 pos += 6; 201 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 202 203 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_cid); 204 205 app_state = A2DP_W2_DISCOVER_SEPS; 206 avdtp_source_discover_stream_endpoints(cid); 207 break; 208 } 209 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 210 break; 211 212 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 213 log_info("A2DP received SBC capability."); 214 if (!sc.local_stream_endpoint) { 215 printf("local seid %d \n", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 216 return; 217 } 218 log_info("A2DP received SBC capability."); 219 220 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)); 221 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)); 222 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)); 223 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 224 225 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)); 226 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)); 227 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)); 228 229 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 230 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 231 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 232 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 233 234 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 235 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 236 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 237 238 app_state = A2DP_W2_SET_CONFIGURATION; 239 break; 240 } 241 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 242 log_info("received non SBC codec. not implemented"); 243 break; 244 245 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 246 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet)); 247 break; 248 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 249 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 250 break; 251 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 252 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_delay_reporting_capability_get_remote_seid(packet)); 253 break; 254 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 255 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 256 break; 257 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 258 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet)); 259 break; 260 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 261 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet)); 262 break; 263 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 264 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 265 break; 266 case AVDTP_SUBEVENT_SIGNALING_CAPABILITY_DONE: 267 break; 268 269 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 270 // TODO check cid 271 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 272 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 273 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 274 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet) - 1; 275 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 276 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 277 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 278 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 279 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 280 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 281 break; 282 } 283 284 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 285 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 286 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, 0); 287 break; 288 289 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 290 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 291 status = avdtp_subevent_streaming_connection_established_get_status(packet); 292 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 293 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 294 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 295 if (status != 0){ 296 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, status %d ---", status); 297 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 298 break; 299 } 300 301 app_state = A2DP_STREAMING_OPENED; 302 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 303 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 304 break; 305 306 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 307 // TODO check cid 308 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 309 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 310 log_info("A2DP Accepted %d, state %d", signal_identifier, app_state); 311 312 switch (app_state){ 313 case A2DP_W2_DISCOVER_SEPS: 314 case A2DP_W2_GET_CAPABILITIES: 315 case A2DP_W2_GET_ALL_CAPABILITIES: 316 app_state = A2DP_W2_GET_ALL_CAPABILITIES; 317 sc.active_remote_sep = avdtp_source_remote_sep(cid, sc.active_remote_sep_index++); 318 if (!sc.active_remote_sep) { 319 app_state = A2DP_IDLE; 320 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, 0, 0, AVDTP_SEID_DOES_NOT_EXIST); 321 break; 322 } 323 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 324 break; 325 case A2DP_W2_SET_CONFIGURATION:{ 326 if (!sc.local_stream_endpoint) return; 327 app_state = A2DP_IDLE; 328 log_info("A2DP initiate set configuration locally and wait for response ... "); 329 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); 330 break; 331 } 332 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 333 log_info("A2DP open stream "); 334 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 335 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 336 break; 337 } 338 case A2DP_STREAMING_OPENED: 339 if (!a2dp_source_context.a2dp_callback) return; 340 switch (signal_identifier){ 341 case AVDTP_SI_START:{ 342 uint8_t event[6]; 343 int pos = 0; 344 event[pos++] = HCI_EVENT_A2DP_META; 345 event[pos++] = sizeof(event) - 2; 346 event[pos++] = A2DP_SUBEVENT_STREAM_STARTED; 347 little_endian_store_16(event, pos, cid); 348 pos += 2; 349 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 350 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 351 break; 352 } 353 case AVDTP_SI_SUSPEND:{ 354 uint8_t event[6]; 355 int pos = 0; 356 event[pos++] = HCI_EVENT_A2DP_META; 357 event[pos++] = sizeof(event) - 2; 358 event[pos++] = A2DP_SUBEVENT_STREAM_SUSPENDED; 359 little_endian_store_16(event, pos, cid); 360 pos += 2; 361 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 362 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 363 break; 364 } 365 case AVDTP_SI_ABORT: 366 case AVDTP_SI_CLOSE:{ 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_STOPPED; 372 little_endian_store_16(event, pos, cid); 373 pos += 2; 374 log_info("send A2DP_SUBEVENT_STREAM_RELEASED to app"); 375 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 376 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 377 break; 378 } 379 default: 380 break; 381 } 382 break; 383 default: 384 app_state = A2DP_IDLE; 385 break; 386 } 387 388 break; 389 case AVDTP_SUBEVENT_SIGNALING_REJECT: 390 app_state = A2DP_IDLE; 391 signal_identifier = avdtp_subevent_signaling_reject_get_signal_identifier(packet); 392 log_info("A2DP Rejected %d", signal_identifier); 393 break; 394 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 395 app_state = A2DP_IDLE; 396 signal_identifier = avdtp_subevent_signaling_general_reject_get_signal_identifier(packet); 397 log_info("A2DP Rejected %d", signal_identifier); 398 break; 399 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 400 app_state = A2DP_IDLE; 401 uint8_t event[6]; 402 int pos = 0; 403 event[pos++] = HCI_EVENT_A2DP_META; 404 event[pos++] = sizeof(event) - 2; 405 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 406 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 407 pos += 2; 408 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 409 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 410 break; 411 } 412 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 413 app_state = A2DP_IDLE; 414 uint8_t event[6]; 415 int pos = 0; 416 event[pos++] = HCI_EVENT_A2DP_META; 417 event[pos++] = sizeof(event) - 2; 418 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 419 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 420 pos += 2; 421 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 422 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 423 break; 424 } 425 default: 426 app_state = A2DP_IDLE; 427 log_info("not implemented"); 428 break; 429 } 430 } 431 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 432 if (callback == NULL){ 433 log_error("a2dp_source_register_packet_handler called with NULL callback"); 434 return; 435 } 436 avdtp_source_register_packet_handler(&packet_handler); 437 a2dp_source_context.a2dp_callback = callback; 438 } 439 440 void a2dp_source_init(void){ 441 avdtp_source_init(&a2dp_source_context); 442 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 443 } 444 445 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 446 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 447 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 448 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 449 if (!local_stream_endpoint){ 450 return NULL; 451 } 452 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 453 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 454 codec_capabilities, codec_capabilities_len); 455 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 456 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 457 sc.local_stream_endpoint = local_stream_endpoint; 458 return local_stream_endpoint; 459 } 460 461 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 462 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 463 if (!sc.local_stream_endpoint){ 464 log_error(" no local_stream_endpoint for seid %d", loc_seid); 465 return AVDTP_SEID_DOES_NOT_EXIST; 466 } 467 memcpy(sc.remote_addr, remote_addr, 6); 468 return avdtp_source_connect(remote_addr, a2dp_cid); 469 } 470 471 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 472 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 473 } 474 475 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 476 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 477 } 478 479 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 480 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 481 } 482 483 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 484 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 485 log_error("small outgoing buffer"); 486 return; 487 } 488 489 uint8_t rtp_version = 2; 490 uint8_t padding = 0; 491 uint8_t extension = 0; 492 uint8_t csrc_count = 0; 493 uint8_t payload_type = 0x60; 494 // uint16_t sequence_number = stream_endpoint->sequence_number; 495 uint32_t timestamp = btstack_run_loop_get_time_ms(); 496 uint32_t ssrc = 0x11223344; 497 498 // rtp header (min size 12B) 499 int pos = 0; 500 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 501 502 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 503 media_packet[pos++] = (marker << 1) | payload_type; 504 big_endian_store_16(media_packet, pos, sequence_number); 505 pos += 2; 506 big_endian_store_32(media_packet, pos, timestamp); 507 pos += 4; 508 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 509 pos += 4; 510 *offset = pos; 511 } 512 513 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 514 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 515 if (!stream_endpoint) { 516 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 517 return; 518 } 519 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 520 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 521 return; 522 } 523 stream_endpoint->send_stream = 1; 524 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 525 } 526 527 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 528 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 529 if (!stream_endpoint) { 530 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 531 return 0; 532 } 533 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 534 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 535 return 0; 536 } 537 538 if (stream_endpoint->l2cap_media_cid == 0){ 539 log_error("A2DP source: no media connection for seid %d", local_seid); 540 return 0; 541 } 542 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 543 } 544 545 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){ 546 if (size < num_bytes_to_copy + 1){ 547 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 548 return; 549 } 550 551 int pos = *offset; 552 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 553 memcpy(media_packet + pos, storage, num_bytes_to_copy); 554 pos += num_bytes_to_copy; 555 *offset = pos; 556 } 557 558 int a2dp_source_stream_send_media_payload(uint16_t a2dp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){ 559 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 560 if (!stream_endpoint) { 561 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 562 return 0; 563 } 564 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 565 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 566 return 0; 567 } 568 569 if (stream_endpoint->l2cap_media_cid == 0){ 570 log_error("A2DP source: no media connection for seid %d", local_seid); 571 return 0; 572 } 573 574 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 575 int offset = 0; 576 577 l2cap_reserve_packet_buffer(); 578 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 579 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 580 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 581 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 582 stream_endpoint->sequence_number++; 583 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 584 return size; 585 } 586