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 <string.h> 43 44 #include "bluetooth_psm.h" 45 #include "bluetooth_sdp.h" 46 #include "btstack_debug.h" 47 #include "btstack_event.h" 48 #include "classic/a2dp_source.h" 49 #include "classic/avdtp_source.h" 50 #include "classic/avdtp_util.h" 51 #include "classic/sdp_util.h" 52 #include "l2cap.h" 53 54 #define AVDTP_MAX_SEP_NUM 10 55 #define A2DP_SET_CONFIG_DELAY_MS 150 56 57 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 58 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 59 60 static avdtp_stream_endpoint_context_t sc; 61 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 62 static int num_remote_seps = 0; 63 static btstack_timer_source_t a2dp_source_set_config_timer; 64 static btstack_packet_handler_t a2dp_source_packet_handler_user; 65 66 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 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){ 69 uint8_t* attribute; 70 de_create_sequence(service); 71 72 // 0x0000 "Service Record Handle" 73 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 74 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 75 76 // 0x0001 "Service Class ID List" 77 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 78 attribute = de_push_sequence(service); 79 { 80 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 81 } 82 de_pop_sequence(service, attribute); 83 84 // 0x0004 "Protocol Descriptor List" 85 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 86 attribute = de_push_sequence(service); 87 { 88 uint8_t* l2cpProtocol = de_push_sequence(attribute); 89 { 90 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 91 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 92 } 93 de_pop_sequence(attribute, l2cpProtocol); 94 95 uint8_t* avProtocol = de_push_sequence(attribute); 96 { 97 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 98 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 99 } 100 de_pop_sequence(attribute, avProtocol); 101 } 102 de_pop_sequence(service, attribute); 103 104 // 0x0005 "Public Browse Group" 105 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 106 attribute = de_push_sequence(service); 107 { 108 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 109 } 110 de_pop_sequence(service, attribute); 111 112 // 0x0009 "Bluetooth Profile Descriptor List" 113 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 114 attribute = de_push_sequence(service); 115 { 116 uint8_t *a2dProfile = de_push_sequence(attribute); 117 { 118 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 119 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 120 } 121 de_pop_sequence(attribute, a2dProfile); 122 } 123 de_pop_sequence(service, attribute); 124 125 126 // 0x0100 "Service Name" 127 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 128 if (service_name){ 129 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 130 } else { 131 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 132 } 133 134 // 0x0100 "Provider Name" 135 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 136 if (service_provider_name){ 137 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 138 } else { 139 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 140 } 141 142 // 0x0311 "Supported Features" 143 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 144 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 145 } 146 147 148 static void a2dp_streaming_emit_can_send_media_packet_now(uint16_t cid, uint8_t seid){ 149 uint8_t event[8]; 150 int pos = 0; 151 event[pos++] = HCI_EVENT_A2DP_META; 152 event[pos++] = sizeof(event) - 2; 153 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 154 little_endian_store_16(event, pos, cid); 155 pos += 2; 156 event[pos++] = seid; 157 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 158 } 159 160 static inline void a2dp_signaling_emit_delay_report_capability(uint8_t * event, uint16_t event_size){ 161 event[0] = HCI_EVENT_A2DP_META; 162 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 163 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 164 } 165 166 static inline void a2dp_signaling_emit_delay_report(uint8_t * event, uint16_t event_size){ 167 event[0] = HCI_EVENT_A2DP_META; 168 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 169 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 170 } 171 172 static inline void a2dp_signaling_emit_media_codec_sbc(uint8_t * event, uint16_t event_size){ 173 if (event_size < 18) return; 174 event[0] = HCI_EVENT_A2DP_META; 175 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 176 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 177 } 178 179 static inline void a2dp_signaling_emit_reject_cmd(uint8_t * event, uint16_t event_size){ 180 if (event_size < 18) return; 181 event[0] = HCI_EVENT_A2DP_META; 182 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 183 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 184 } 185 186 static void a2dp_signaling_emit_connection_established(uint16_t cid, bd_addr_t addr, uint8_t status){ 187 uint8_t event[12]; 188 int pos = 0; 189 event[pos++] = HCI_EVENT_A2DP_META; 190 event[pos++] = sizeof(event) - 2; 191 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 192 little_endian_store_16(event, pos, cid); 193 pos += 2; 194 reverse_bd_addr(addr,&event[pos]); 195 pos += 6; 196 event[pos++] = status; 197 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 198 } 199 200 static void a2dp_signaling_emit_control_command(uint16_t cid, uint8_t local_seid, uint8_t cmd){ 201 uint8_t event[6]; 202 int pos = 0; 203 event[pos++] = HCI_EVENT_A2DP_META; 204 event[pos++] = sizeof(event) - 2; 205 event[pos++] = cmd; 206 little_endian_store_16(event, pos, cid); 207 pos += 2; 208 event[pos++] = local_seid; 209 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 210 } 211 212 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 213 uint8_t event[7]; 214 int pos = 0; 215 event[pos++] = HCI_EVENT_A2DP_META; 216 event[pos++] = sizeof(event) - 2; 217 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 218 little_endian_store_16(event, pos, cid); 219 pos += 2; 220 event[pos++] = local_seid; 221 event[pos++] = status; 222 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 223 } 224 225 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * timer){ 226 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 227 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 228 229 if (connection == NULL) return; 230 if (connection->a2dp_source_state != A2DP_CONNECTED) return; 231 232 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 233 avdtp_source_discover_stream_endpoints(avdtp_cid); 234 } 235 static void a2dp_source_set_config_timer_start(uint16_t avdtp_cid){ 236 log_info("a2dp_source_set_config_timer_start cid 0%02x", avdtp_cid); 237 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 238 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 239 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 240 btstack_run_loop_set_timer_context(&a2dp_source_set_config_timer, (void *)(uintptr_t)avdtp_cid); 241 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 242 } 243 static void a2dp_source_set_config_timer_stop(void){ 244 log_info("a2dp_source_set_config_timer_stop"); 245 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 246 } 247 248 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 249 UNUSED(channel); 250 UNUSED(size); 251 252 uint16_t cid; 253 avdtp_connection_t * connection; 254 255 uint8_t signal_identifier; 256 uint8_t status; 257 uint8_t local_seid; 258 uint8_t remote_seid; 259 bd_addr_t address; 260 261 if (packet_type != HCI_EVENT_PACKET) return; 262 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 263 264 switch (packet[2]){ 265 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 266 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 267 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 268 269 connection = avdtp_get_connection_for_avdtp_cid(cid); 270 btstack_assert(connection != NULL); 271 272 status = avdtp_subevent_signaling_connection_established_get_status(packet); 273 if (status != 0){ 274 log_info("A2DP singnaling connection failed status %d", status); 275 connection->a2dp_source_state = A2DP_IDLE; 276 a2dp_signaling_emit_connection_established(cid, sc.remote_addr, status); 277 break; 278 } 279 log_info("A2DP singnaling connection established avdtp_cid 0x%02x", cid); 280 281 282 sc.avdtp_cid = cid; 283 sc.active_remote_sep_index = 0; 284 num_remote_seps = 0; 285 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 286 287 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 288 if (connection->a2dp_source_state == A2DP_W4_CONNECTED){ 289 log_info("A2DP singnaling connection: discover seps"); 290 connection->a2dp_source_state = A2DP_W2_DISCOVER_SEPS; 291 avdtp_source_discover_stream_endpoints(sc.avdtp_cid); 292 } else { 293 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 294 connection->a2dp_source_state = A2DP_CONNECTED; 295 a2dp_source_set_config_timer_start(cid); 296 } 297 298 // notify app 299 a2dp_signaling_emit_connection_established(cid, sc.remote_addr, ERROR_CODE_SUCCESS); 300 break; 301 } 302 303 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 304 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 305 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 306 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 307 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 308 309 if (!sc.local_stream_endpoint) { 310 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 311 return; 312 } 313 314 cid = avdtp_subevent_signaling_media_codec_sbc_capability_get_avdtp_cid(packet); 315 316 connection = avdtp_get_connection_for_avdtp_cid(cid); 317 btstack_assert(connection != NULL); 318 319 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)); 320 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)); 321 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)); 322 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 323 324 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)); 325 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)); 326 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)); 327 328 329 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 330 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 331 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 332 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 333 334 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 335 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 336 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 337 338 connection->a2dp_source_state = A2DP_W2_SET_CONFIGURATION; 339 break; 340 } 341 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 342 log_info("received non SBC codec. not implemented"); 343 break; 344 345 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 346 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid %d", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet)); 347 break; 348 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 349 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 350 break; 351 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 352 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 353 break; 354 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 355 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid %d", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet)); 356 break; 357 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 358 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid %d", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet)); 359 break; 360 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 361 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 362 break; 363 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 364 a2dp_signaling_emit_delay_report_capability(packet, size); 365 break; 366 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 367 cid = avdtp_subevent_signaling_capabilities_done_get_avdtp_cid(packet); 368 369 connection = avdtp_get_connection_for_avdtp_cid(cid); 370 btstack_assert(connection != NULL); 371 372 if (connection->a2dp_source_state == A2DP_W2_GET_CAPABILITIES){ 373 // endpoint was not suitable, check next one 374 sc.active_remote_sep_index++; 375 if (sc.active_remote_sep_index >= num_remote_seps){ 376 // we didn't find a suitable SBC stream endpoint, sorry. 377 connection->a2dp_source_state = A2DP_CONNECTED; 378 } 379 } 380 break; 381 382 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 383 // forward packet: 384 a2dp_signaling_emit_delay_report(packet, size); 385 break; 386 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION: 387 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 388 389 connection = avdtp_get_connection_for_avdtp_cid(cid); 390 btstack_assert(connection != NULL); 391 392 a2dp_source_set_config_timer_stop(); 393 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 394 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 395 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 396 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 397 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 398 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 399 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 400 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 401 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u., remote seid %d", sc.sampling_frequency, sc.max_bitpool_value, avdtp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet)); 402 connection->a2dp_source_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 403 a2dp_signaling_emit_media_codec_sbc(packet, size); 404 break; 405 406 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 407 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 408 local_seid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 409 a2dp_streaming_emit_can_send_media_packet_now(cid, local_seid); 410 break; 411 412 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 413 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 414 415 connection = avdtp_get_connection_for_avdtp_cid(cid); 416 btstack_assert(connection != NULL); 417 418 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 419 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 420 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 421 status = avdtp_subevent_streaming_connection_established_get_status(packet); 422 423 if (status != 0){ 424 log_info("A2DP streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 425 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, status); 426 break; 427 } 428 429 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 430 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 431 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, 0); 432 break; 433 434 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 435 avdtp_sep_t sep; 436 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 437 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 438 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 439 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 440 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 441 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 442 if (sep.type == AVDTP_SINK){ 443 remote_seps[num_remote_seps++] = sep; 444 } 445 break; 446 } 447 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 448 cid = avdtp_subevent_signaling_sep_dicovery_done_get_avdtp_cid(packet); 449 450 connection = avdtp_get_connection_for_avdtp_cid(cid); 451 btstack_assert(connection != NULL); 452 453 connection->a2dp_source_state = A2DP_W2_GET_CAPABILITIES; 454 sc.active_remote_sep_index = 0; 455 break; 456 457 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 458 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 459 460 connection = avdtp_get_connection_for_avdtp_cid(cid); 461 btstack_assert(connection != NULL); 462 463 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 464 465 log_info("A2DP cmd %s accepted, state %x, is_initiator %u, cid 0x%2x, local seid %d", avdtp_si2str(signal_identifier), connection->a2dp_source_state, 466 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 467 468 switch (connection->a2dp_source_state){ 469 case A2DP_W2_GET_CAPABILITIES: 470 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 471 log_info("A2DP get capabilities for remote seid %d", remote_seid); 472 avdtp_source_get_capabilities(cid, remote_seid); 473 break; 474 case A2DP_W2_SET_CONFIGURATION:{ 475 if (sc.local_stream_endpoint != NULL){ 476 remote_seid = remote_seps[sc.active_remote_sep_index].seid; 477 log_info("A2DP initiate set configuration locally and wait for response ... local seid %d, remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid); 478 connection->a2dp_source_state = A2DP_IDLE; 479 avdtp_source_set_configuration(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seid, sc.local_stream_endpoint->remote_configuration_bitmap, sc.local_stream_endpoint->remote_configuration); 480 } 481 break; 482 } 483 case A2DP_W2_RECONFIGURE_WITH_SEID: 484 log_info("A2DP reconfigured ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 485 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 486 connection->a2dp_source_state = A2DP_STREAMING_OPENED; 487 break; 488 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 489 log_info("A2DP open stream ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 490 connection->a2dp_source_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 491 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 492 break; 493 } 494 case A2DP_STREAMING_OPENED: 495 switch (signal_identifier){ 496 case AVDTP_SI_START: 497 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 498 break; 499 case AVDTP_SI_SUSPEND: 500 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 501 break; 502 case AVDTP_SI_ABORT: 503 case AVDTP_SI_CLOSE: 504 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 505 break; 506 default: 507 break; 508 } 509 break; 510 default: 511 connection->a2dp_source_state = A2DP_CONNECTED; 512 break; 513 } 514 515 break; 516 case AVDTP_SUBEVENT_SIGNALING_REJECT: 517 cid = avdtp_subevent_signaling_reject_get_avdtp_cid(packet); 518 connection = avdtp_get_connection_for_avdtp_cid(cid); 519 btstack_assert(connection != NULL); 520 521 connection->a2dp_source_state = A2DP_CONNECTED; 522 a2dp_signaling_emit_reject_cmd(packet, size); 523 break; 524 525 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 526 cid = avdtp_subevent_signaling_general_reject_get_avdtp_cid(packet); 527 connection = avdtp_get_connection_for_avdtp_cid(cid); 528 btstack_assert(connection != NULL); 529 530 connection->a2dp_source_state = A2DP_CONNECTED; 531 a2dp_signaling_emit_reject_cmd(packet, size); 532 break; 533 534 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 535 uint8_t event[6]; 536 int pos = 0; 537 event[pos++] = HCI_EVENT_A2DP_META; 538 event[pos++] = sizeof(event) - 2; 539 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 540 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 541 pos += 2; 542 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 543 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 544 break; 545 } 546 547 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 548 cid = avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet); 549 connection = avdtp_get_connection_for_avdtp_cid(cid); 550 btstack_assert(connection != NULL); 551 552 connection->a2dp_source_state = A2DP_CONFIGURED; 553 554 uint8_t event[6]; 555 int pos = 0; 556 event[pos++] = HCI_EVENT_A2DP_META; 557 event[pos++] = sizeof(event) - 2; 558 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 559 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 560 pos += 2; 561 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 562 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 563 break; 564 } 565 default: 566 break; 567 } 568 } 569 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 570 btstack_assert(callback != NULL); 571 572 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 573 a2dp_source_packet_handler_user = callback; 574 } 575 576 void a2dp_source_init(void){ 577 avdtp_source_init(); 578 } 579 580 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 581 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 582 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 583 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 584 if (!local_stream_endpoint){ 585 return NULL; 586 } 587 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 588 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 589 codec_capabilities, codec_capabilities_len); 590 591 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 592 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 593 sc.local_stream_endpoint = local_stream_endpoint; 594 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 595 return local_stream_endpoint; 596 } 597 598 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * avdtp_cid){ 599 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 600 if (!sc.local_stream_endpoint){ 601 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 602 } 603 604 (void)memcpy(sc.remote_addr, remote_addr, 6); 605 606 uint8_t status = avdtp_source_connect(remote_addr, avdtp_cid); 607 if (status != ERROR_CODE_SUCCESS) return status; 608 609 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(*avdtp_cid); 610 btstack_assert(connection != NULL); 611 612 connection->a2dp_source_state = A2DP_W4_CONNECTED; 613 614 return ERROR_CODE_SUCCESS; 615 } 616 617 uint8_t a2dp_source_disconnect(uint16_t avdtp_cid){ 618 return avdtp_disconnect(avdtp_cid); 619 } 620 621 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t avdtp_cid, uint32_t sampling_frequency){ 622 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 623 if (connection == NULL) ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 624 625 log_info("a2dp_source_reconfigure_stream"); 626 627 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 628 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 629 4); 630 631 // update sampling frequency 632 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 633 switch (sampling_frequency){ 634 case 48000: 635 config |= (AVDTP_SBC_48000 << 4); 636 break; 637 case 44100: 638 config |= (AVDTP_SBC_44100 << 4); 639 break; 640 case 32000: 641 config |= (AVDTP_SBC_32000 << 4); 642 break; 643 case 16000: 644 config |= (AVDTP_SBC_16000 << 4); 645 break; 646 default: 647 log_error("Unsupported sampling frequency %u", sampling_frequency); 648 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 649 } 650 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 651 652 avdtp_capabilities_t new_configuration; 653 new_configuration.media_codec.media_type = AVDTP_AUDIO; 654 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 655 new_configuration.media_codec.media_codec_information_len = 4; 656 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 657 658 // start reconfigure 659 connection->a2dp_source_state = A2DP_W2_RECONFIGURE_WITH_SEID; 660 661 return avdtp_source_reconfigure( 662 avdtp_cid, 663 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 664 sc.local_stream_endpoint->remote_sep.seid, 665 1 << AVDTP_MEDIA_CODEC, 666 new_configuration 667 ); 668 } 669 670 uint8_t a2dp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 671 return avdtp_start_stream(avdtp_cid, local_seid); 672 } 673 674 uint8_t a2dp_source_pause_stream(uint16_t avdtp_cid, uint8_t local_seid){ 675 return avdtp_suspend_stream(avdtp_cid, local_seid); 676 } 677 678 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 679 avdtp_source_stream_endpoint_request_can_send_now(avdtp_cid, local_seid); 680 } 681 682 int a2dp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 683 return avdtp_max_media_payload_size(avdtp_cid, local_seid); 684 } 685 686 int a2dp_source_stream_send_media_payload(uint16_t avdtp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){ 687 return avdtp_source_stream_send_media_payload(avdtp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 688 } 689