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 a2dp_state_t app_state = A2DP_IDLE; 61 static avdtp_stream_endpoint_context_t sc; 62 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 63 static int num_remote_seps = 0; 64 static btstack_timer_source_t a2dp_source_set_config_timer; 65 static btstack_packet_handler_t a2dp_source_packet_handler_user; 66 67 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 68 69 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){ 70 uint8_t* attribute; 71 de_create_sequence(service); 72 73 // 0x0000 "Service Record Handle" 74 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 75 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 76 77 // 0x0001 "Service Class ID List" 78 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 79 attribute = de_push_sequence(service); 80 { 81 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 82 } 83 de_pop_sequence(service, attribute); 84 85 // 0x0004 "Protocol Descriptor List" 86 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 87 attribute = de_push_sequence(service); 88 { 89 uint8_t* l2cpProtocol = de_push_sequence(attribute); 90 { 91 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 92 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 93 } 94 de_pop_sequence(attribute, l2cpProtocol); 95 96 uint8_t* avProtocol = de_push_sequence(attribute); 97 { 98 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 99 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 100 } 101 de_pop_sequence(attribute, avProtocol); 102 } 103 de_pop_sequence(service, attribute); 104 105 // 0x0005 "Public Browse Group" 106 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 107 attribute = de_push_sequence(service); 108 { 109 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 110 } 111 de_pop_sequence(service, attribute); 112 113 // 0x0009 "Bluetooth Profile Descriptor List" 114 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 115 attribute = de_push_sequence(service); 116 { 117 uint8_t *a2dProfile = de_push_sequence(attribute); 118 { 119 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 120 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 121 } 122 de_pop_sequence(attribute, a2dProfile); 123 } 124 de_pop_sequence(service, attribute); 125 126 127 // 0x0100 "Service Name" 128 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 129 if (service_name){ 130 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 131 } else { 132 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 133 } 134 135 // 0x0100 "Provider Name" 136 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 137 if (service_provider_name){ 138 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 139 } else { 140 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 141 } 142 143 // 0x0311 "Supported Features" 144 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 145 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 146 } 147 148 149 static void a2dp_streaming_emit_can_send_media_packet_now(uint16_t cid, uint8_t seid){ 150 uint8_t event[8]; 151 int pos = 0; 152 event[pos++] = HCI_EVENT_A2DP_META; 153 event[pos++] = sizeof(event) - 2; 154 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 155 little_endian_store_16(event, pos, cid); 156 pos += 2; 157 event[pos++] = seid; 158 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 159 } 160 161 static inline void a2dp_signaling_emit_delay_report_capability(uint8_t * event, uint16_t event_size){ 162 event[0] = HCI_EVENT_A2DP_META; 163 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 164 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 165 } 166 167 static inline void a2dp_signaling_emit_capabilities_done(uint8_t * event, uint16_t event_size){ 168 event[0] = HCI_EVENT_A2DP_META; 169 event[2] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 170 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 171 } 172 173 static inline void a2dp_signaling_emit_delay_report(uint8_t * event, uint16_t event_size){ 174 event[0] = HCI_EVENT_A2DP_META; 175 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 176 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 177 } 178 179 static inline void a2dp_signaling_emit_media_codec_sbc(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_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 183 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 184 } 185 186 static inline void a2dp_signaling_emit_reject_cmd(uint8_t * event, uint16_t event_size){ 187 if (event_size < 18) return; 188 event[0] = HCI_EVENT_A2DP_META; 189 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 190 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, event_size); 191 } 192 193 static void a2dp_signaling_emit_connection_established(uint16_t cid, bd_addr_t addr, uint8_t status){ 194 uint8_t event[12]; 195 int pos = 0; 196 event[pos++] = HCI_EVENT_A2DP_META; 197 event[pos++] = sizeof(event) - 2; 198 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 199 little_endian_store_16(event, pos, cid); 200 pos += 2; 201 reverse_bd_addr(addr,&event[pos]); 202 pos += 6; 203 event[pos++] = status; 204 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 205 } 206 207 static void a2dp_signaling_emit_control_command(uint16_t cid, uint8_t local_seid, uint8_t cmd){ 208 uint8_t event[6]; 209 int pos = 0; 210 event[pos++] = HCI_EVENT_A2DP_META; 211 event[pos++] = sizeof(event) - 2; 212 event[pos++] = cmd; 213 little_endian_store_16(event, pos, cid); 214 pos += 2; 215 event[pos++] = local_seid; 216 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 217 } 218 219 static void a2dp_signaling_emit_reconfigured(uint16_t cid, uint8_t local_seid, uint8_t status){ 220 uint8_t event[7]; 221 int pos = 0; 222 event[pos++] = HCI_EVENT_A2DP_META; 223 event[pos++] = sizeof(event) - 2; 224 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 225 little_endian_store_16(event, pos, cid); 226 pos += 2; 227 event[pos++] = local_seid; 228 event[pos++] = status; 229 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 230 } 231 232 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * ts){ 233 UNUSED(ts); 234 if (app_state != A2DP_CONNECTED) return; 235 app_state = A2DP_W2_DISCOVER_SEPS; 236 avdtp_source_discover_stream_endpoints(sc.avdtp_cid); 237 } 238 static void a2dp_source_set_config_timer_start(void){ 239 log_info("a2dp_source_set_config_timer_start"); 240 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 241 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 242 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 243 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 244 } 245 static void a2dp_source_set_config_timer_stop(void){ 246 log_info("a2dp_source_set_config_timer_stop"); 247 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 248 } 249 250 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 251 UNUSED(channel); 252 UNUSED(size); 253 254 uint8_t signal_identifier; 255 uint8_t status; 256 uint8_t local_seid; 257 uint8_t remote_seid; 258 uint16_t cid; 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 status = avdtp_subevent_signaling_connection_established_get_status(packet); 269 270 if (status != 0){ 271 log_info("A2DP singnaling connection failed status %d", status); 272 app_state = A2DP_IDLE; 273 a2dp_signaling_emit_connection_established(cid, sc.remote_addr, status); 274 break; 275 } 276 log_info("A2DP singnaling connection established avdtp_cid 0x%02x", cid); 277 278 sc.avdtp_cid = cid; 279 sc.active_remote_sep_index = 0; 280 num_remote_seps = 0; 281 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 282 283 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 284 if (app_state == A2DP_W4_CONNECTED){ 285 log_info("A2DP singnaling connection: discover seps"); 286 app_state = A2DP_W2_DISCOVER_SEPS; 287 avdtp_source_discover_stream_endpoints(sc.avdtp_cid); 288 } else { 289 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 290 app_state = A2DP_CONNECTED; 291 a2dp_source_set_config_timer_start(); 292 } 293 294 // notify app 295 a2dp_signaling_emit_connection_established(cid, sc.remote_addr, ERROR_CODE_SUCCESS); 296 break; 297 } 298 299 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 300 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 301 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 302 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 303 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), remote_seps[sc.active_remote_sep_index].seid ); 304 305 if (!sc.local_stream_endpoint) { 306 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 307 return; 308 } 309 310 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)); 311 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)); 312 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)); 313 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 314 315 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)); 316 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)); 317 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)); 318 319 320 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 321 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 322 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 323 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 324 325 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 326 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 327 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 328 329 app_state = A2DP_W2_SET_CONFIGURATION; 330 break; 331 } 332 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 333 log_info("received non SBC codec. not implemented"); 334 break; 335 336 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 337 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)); 338 break; 339 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 340 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 341 break; 342 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 343 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 344 break; 345 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 346 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)); 347 break; 348 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 349 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)); 350 break; 351 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 352 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 353 break; 354 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 355 a2dp_signaling_emit_delay_report_capability(packet, size); 356 break; 357 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 358 a2dp_signaling_emit_capabilities_done(packet, size); 359 break; 360 361 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 362 // forward packet: 363 a2dp_signaling_emit_delay_report(packet, size); 364 break; 365 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 366 // TODO check cid 367 a2dp_source_set_config_timer_stop(); 368 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 369 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 370 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 371 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 372 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 373 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 374 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 375 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 376 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)); 377 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 378 a2dp_signaling_emit_media_codec_sbc(packet, size); 379 break; 380 } 381 382 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 383 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 384 local_seid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 385 // log_info("A2DP STREAMING_CAN_SEND_MEDIA_PACKET_NOW cid 0x%02x, local_seid %d", cid, local_seid); 386 a2dp_streaming_emit_can_send_media_packet_now(cid, local_seid); 387 break; 388 389 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 390 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 391 status = avdtp_subevent_streaming_connection_established_get_status(packet); 392 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 393 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 394 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 395 if (status != 0){ 396 log_info("A2DP streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 397 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, status); 398 break; 399 } 400 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 401 app_state = A2DP_STREAMING_OPENED; 402 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, 0); 403 break; 404 405 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 406 avdtp_sep_t sep; 407 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 408 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 409 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 410 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 411 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s, index %d", 412 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 413 if (sep.type == AVDTP_SINK){ 414 remote_seps[num_remote_seps++] = sep; 415 } 416 break; 417 } 418 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 419 app_state = A2DP_W2_GET_CAPABILITIES; 420 sc.active_remote_sep_index = 0; 421 break; 422 423 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 424 // TODO check cid 425 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 426 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 427 log_info("A2DP cmd %s accepted, state %x, is_initiator %u, cid 0x%2x, local seid %d", avdtp_si2str(signal_identifier), app_state, 428 avdtp_subevent_signaling_accept_get_is_initiator(packet), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 429 430 switch (app_state){ 431 case A2DP_W2_GET_CAPABILITIES: 432 if (sc.active_remote_sep_index < num_remote_seps){ 433 sc.active_remote_sep_index++; 434 uint8_t remote_seid = remote_seps[sc.active_remote_sep_index].seid; 435 log_info("A2DP get capabilities for remote seid %d", remote_seid); 436 avdtp_source_get_capabilities(cid, remote_seid); 437 } 438 break; 439 case A2DP_W2_SET_CONFIGURATION:{ 440 if (sc.local_stream_endpoint != NULL){ 441 uint8_t remote_seid = remote_seps[sc.active_remote_sep_index].seid; 442 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); 443 app_state = A2DP_IDLE; 444 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); 445 } 446 break; 447 } 448 case A2DP_W2_RECONFIGURE_WITH_SEID: 449 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); 450 a2dp_signaling_emit_reconfigured(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), ERROR_CODE_SUCCESS); 451 app_state = A2DP_STREAMING_OPENED; 452 break; 453 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 454 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); 455 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 456 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.local_stream_endpoint->remote_sep.seid); 457 break; 458 } 459 case A2DP_STREAMING_OPENED: 460 switch (signal_identifier){ 461 case AVDTP_SI_START: 462 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 463 break; 464 case AVDTP_SI_SUSPEND: 465 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 466 break; 467 case AVDTP_SI_ABORT: 468 case AVDTP_SI_CLOSE: 469 a2dp_signaling_emit_control_command(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 470 break; 471 default: 472 break; 473 } 474 break; 475 default: 476 app_state = A2DP_IDLE; 477 break; 478 } 479 480 break; 481 case AVDTP_SUBEVENT_SIGNALING_REJECT: 482 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 483 app_state = A2DP_IDLE; 484 a2dp_signaling_emit_reject_cmd(packet, size); 485 break; 486 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 487 app_state = A2DP_IDLE; 488 uint8_t event[6]; 489 int pos = 0; 490 event[pos++] = HCI_EVENT_A2DP_META; 491 event[pos++] = sizeof(event) - 2; 492 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 493 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 494 pos += 2; 495 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 496 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 497 break; 498 } 499 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 500 app_state = A2DP_IDLE; 501 uint8_t event[6]; 502 int pos = 0; 503 event[pos++] = HCI_EVENT_A2DP_META; 504 event[pos++] = sizeof(event) - 2; 505 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 506 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 507 pos += 2; 508 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 509 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 510 break; 511 } 512 default: 513 break; 514 } 515 } 516 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 517 btstack_assert(callback != NULL); 518 519 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 520 a2dp_source_packet_handler_user = callback; 521 } 522 523 void a2dp_source_init(void){ 524 avdtp_source_init(); 525 } 526 527 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 528 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 529 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 530 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 531 if (!local_stream_endpoint){ 532 return NULL; 533 } 534 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 535 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 536 codec_capabilities, codec_capabilities_len); 537 538 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 539 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 540 sc.local_stream_endpoint = local_stream_endpoint; 541 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 542 return local_stream_endpoint; 543 } 544 545 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 546 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 547 if (!sc.local_stream_endpoint){ 548 log_error(" no local_stream_endpoint for seid %d", loc_seid); 549 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 550 } 551 (void)memcpy(sc.remote_addr, remote_addr, 6); 552 app_state = A2DP_W4_CONNECTED; 553 return avdtp_source_connect(remote_addr, a2dp_cid); 554 } 555 556 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 557 return avdtp_disconnect(a2dp_cid); 558 } 559 560 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 561 // UNUSED(sampling_frequency); 562 563 log_info("a2dp_source_reconfigure_stream"); 564 565 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 566 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 567 4); 568 569 // update sampling frequency 570 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 571 switch (sampling_frequency){ 572 case 48000: 573 config |= (AVDTP_SBC_48000 << 4); 574 break; 575 case 44100: 576 config |= (AVDTP_SBC_44100 << 4); 577 break; 578 case 32000: 579 config |= (AVDTP_SBC_32000 << 4); 580 break; 581 case 16000: 582 config |= (AVDTP_SBC_16000 << 4); 583 break; 584 default: 585 log_error("Unsupported sampling frequency %u", sampling_frequency); 586 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 587 } 588 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 589 590 avdtp_capabilities_t new_configuration; 591 new_configuration.media_codec.media_type = AVDTP_AUDIO; 592 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 593 new_configuration.media_codec.media_codec_information_len = 4; 594 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 595 596 // sttart reconfigure 597 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 598 return avdtp_source_reconfigure( 599 a2dp_cid, 600 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 601 sc.local_stream_endpoint->remote_sep.seid, 602 1 << AVDTP_MEDIA_CODEC, 603 new_configuration 604 ); 605 } 606 607 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 608 return avdtp_start_stream(a2dp_cid, local_seid); 609 } 610 611 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 612 return avdtp_suspend_stream(a2dp_cid, local_seid); 613 } 614 615 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 616 avdtp_source_stream_endpoint_request_can_send_now(a2dp_cid, local_seid); 617 } 618 619 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 620 return avdtp_max_media_payload_size(a2dp_cid, local_seid); 621 } 622 623 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){ 624 return avdtp_source_stream_send_media_payload(a2dp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 625 } 626