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 static avdtp_context_t a2dp_source_context; 60 61 static a2dp_state_t app_state = A2DP_IDLE; 62 static avdtp_stream_endpoint_context_t sc; 63 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 64 static int num_remote_seps = 0; 65 static btstack_timer_source_t a2dp_source_set_config_timer; 66 static btstack_packet_handler_t a2dp_source_packet_handler_user; 67 68 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 69 70 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){ 71 uint8_t* attribute; 72 de_create_sequence(service); 73 74 // 0x0000 "Service Record Handle" 75 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 76 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 77 78 // 0x0001 "Service Class ID List" 79 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 80 attribute = de_push_sequence(service); 81 { 82 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 83 } 84 de_pop_sequence(service, attribute); 85 86 // 0x0004 "Protocol Descriptor List" 87 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 88 attribute = de_push_sequence(service); 89 { 90 uint8_t* l2cpProtocol = de_push_sequence(attribute); 91 { 92 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 93 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 94 } 95 de_pop_sequence(attribute, l2cpProtocol); 96 97 uint8_t* avProtocol = de_push_sequence(attribute); 98 { 99 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 100 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 101 } 102 de_pop_sequence(attribute, avProtocol); 103 } 104 de_pop_sequence(service, attribute); 105 106 // 0x0005 "Public Browse Group" 107 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 108 attribute = de_push_sequence(service); 109 { 110 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 111 } 112 de_pop_sequence(service, attribute); 113 114 // 0x0009 "Bluetooth Profile Descriptor List" 115 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 116 attribute = de_push_sequence(service); 117 { 118 uint8_t *a2dProfile = de_push_sequence(attribute); 119 { 120 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 121 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 122 } 123 de_pop_sequence(attribute, a2dProfile); 124 } 125 de_pop_sequence(service, attribute); 126 127 128 // 0x0100 "Service Name" 129 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 130 if (service_name){ 131 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 132 } else { 133 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 134 } 135 136 // 0x0100 "Provider Name" 137 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 138 if (service_provider_name){ 139 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 140 } else { 141 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 142 } 143 144 // 0x0311 "Supported Features" 145 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 146 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 147 } 148 149 150 static void a2dp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 151 if (!callback) return; 152 uint8_t event[8]; 153 int pos = 0; 154 event[pos++] = HCI_EVENT_A2DP_META; 155 event[pos++] = sizeof(event) - 2; 156 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 157 little_endian_store_16(event, pos, cid); 158 pos += 2; 159 event[pos++] = seid; 160 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 161 } 162 163 static inline void a2dp_signaling_emit_delay_report_capability(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 164 if (!callback) return; 165 event[0] = HCI_EVENT_A2DP_META; 166 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 167 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 168 } 169 170 static inline void a2dp_signaling_emit_capabilities_done(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 171 if (!callback) return; 172 event[0] = HCI_EVENT_A2DP_META; 173 event[2] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 174 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 175 } 176 177 static inline void a2dp_signaling_emit_delay_report(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 178 if (!callback) return; 179 event[0] = HCI_EVENT_A2DP_META; 180 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 181 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 182 } 183 184 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 185 if (!callback) return; 186 if (event_size < 18) return; 187 event[0] = HCI_EVENT_A2DP_META; 188 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 189 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 190 } 191 192 static inline void a2dp_signaling_emit_reject_cmd(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 193 if (!callback) return; 194 if (event_size < 18) return; 195 event[0] = HCI_EVENT_A2DP_META; 196 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 197 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 198 } 199 200 static void a2dp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t status){ 201 if (!callback) return; 202 uint8_t event[12]; 203 int pos = 0; 204 event[pos++] = HCI_EVENT_A2DP_META; 205 event[pos++] = sizeof(event) - 2; 206 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 207 little_endian_store_16(event, pos, cid); 208 pos += 2; 209 reverse_bd_addr(addr,&event[pos]); 210 pos += 6; 211 event[pos++] = status; 212 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 213 } 214 215 static void a2dp_signaling_emit_control_command(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t cmd){ 216 if (!callback) return; 217 uint8_t event[6]; 218 int pos = 0; 219 event[pos++] = HCI_EVENT_A2DP_META; 220 event[pos++] = sizeof(event) - 2; 221 event[pos++] = cmd; 222 little_endian_store_16(event, pos, cid); 223 pos += 2; 224 event[pos++] = local_seid; 225 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 226 } 227 228 static void a2dp_signaling_emit_reconfigured(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t status){ 229 if (!callback) return; 230 uint8_t event[7]; 231 int pos = 0; 232 event[pos++] = HCI_EVENT_A2DP_META; 233 event[pos++] = sizeof(event) - 2; 234 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 235 little_endian_store_16(event, pos, cid); 236 pos += 2; 237 event[pos++] = local_seid; 238 event[pos++] = status; 239 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 240 } 241 242 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * ts){ 243 UNUSED(ts); 244 if (app_state != A2DP_CONNECTED) return; 245 app_state = A2DP_W2_DISCOVER_SEPS; 246 avdtp_source_discover_stream_endpoints(sc.avdtp_cid); 247 } 248 static void a2dp_source_set_config_timer_start(void){ 249 log_info("a2dp_source_set_config_timer_start"); 250 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 251 btstack_run_loop_set_timer_handler(&a2dp_source_set_config_timer,a2dp_source_set_config_timer_handler); 252 btstack_run_loop_set_timer(&a2dp_source_set_config_timer, A2DP_SET_CONFIG_DELAY_MS); 253 btstack_run_loop_add_timer(&a2dp_source_set_config_timer); 254 } 255 static void a2dp_source_set_config_timer_stop(void){ 256 log_info("a2dp_source_set_config_timer_stop"); 257 btstack_run_loop_remove_timer(&a2dp_source_set_config_timer); 258 } 259 260 static void a2dp_source_packet_handler_internal(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 261 UNUSED(channel); 262 UNUSED(size); 263 264 uint8_t signal_identifier; 265 uint8_t status; 266 uint8_t local_seid; 267 uint8_t remote_seid; 268 uint16_t cid; 269 bd_addr_t address; 270 271 if (packet_type != HCI_EVENT_PACKET) return; 272 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 273 274 switch (packet[2]){ 275 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 276 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 277 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 278 status = avdtp_subevent_signaling_connection_established_get_status(packet); 279 280 if (status != 0){ 281 log_info("A2DP singnaling connection failed status %d", status); 282 app_state = A2DP_IDLE; 283 a2dp_signaling_emit_connection_established(a2dp_source_packet_handler_user, cid, sc.remote_addr, status); 284 break; 285 } 286 log_info("A2DP singnaling connection established avdtp_cid 0x%02x", cid); 287 288 sc.avdtp_cid = cid; 289 sc.active_remote_sep = NULL; 290 sc.active_remote_sep_index = 0; 291 num_remote_seps = 0; 292 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 293 294 // if we initiated the connection, start config right away, else wait a bit to give remote a chance to do it first 295 if (app_state == A2DP_W4_CONNECTED){ 296 log_info("A2DP singnaling connection: discover seps"); 297 app_state = A2DP_W2_DISCOVER_SEPS; 298 avdtp_source_discover_stream_endpoints(sc.avdtp_cid); 299 } else { 300 log_info("A2DP singnaling connection: wait a bit, then discover seps"); 301 app_state = A2DP_CONNECTED; 302 a2dp_source_set_config_timer_start(); 303 } 304 305 // notify app 306 a2dp_signaling_emit_connection_established(a2dp_source_packet_handler_user, cid, sc.remote_addr, ERROR_CODE_SUCCESS); 307 break; 308 } 309 310 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 311 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 312 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 313 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 314 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid ); 315 316 if (!sc.local_stream_endpoint) { 317 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 318 return; 319 } 320 321 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)); 322 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)); 323 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)); 324 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 325 326 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)); 327 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)); 328 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)); 329 330 331 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 332 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 333 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 334 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 335 336 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 337 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 338 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 339 340 app_state = A2DP_W2_SET_CONFIGURATION; 341 break; 342 } 343 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 344 log_info("received non SBC codec. not implemented"); 345 break; 346 347 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 348 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)); 349 break; 350 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 351 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 352 break; 353 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 354 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 355 break; 356 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 357 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)); 358 break; 359 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 360 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)); 361 break; 362 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 363 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 364 break; 365 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 366 a2dp_signaling_emit_delay_report_capability(a2dp_source_packet_handler_user, packet, size); 367 break; 368 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 369 a2dp_signaling_emit_capabilities_done(a2dp_source_packet_handler_user, packet, size); 370 break; 371 372 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 373 // forward packet: 374 a2dp_signaling_emit_delay_report(a2dp_source_packet_handler_user, packet, size); 375 break; 376 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 377 // TODO check cid 378 a2dp_source_set_config_timer_stop(); 379 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 380 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 381 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 382 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 383 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 384 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 385 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 386 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 387 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)); 388 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 389 a2dp_signaling_emit_media_codec_sbc(a2dp_source_packet_handler_user, packet, size); 390 break; 391 } 392 393 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 394 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 395 local_seid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 396 // log_info("A2DP STREAMING_CAN_SEND_MEDIA_PACKET_NOW cid 0x%02x, local_seid %d", cid, local_seid); 397 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_packet_handler_user, cid, local_seid); 398 break; 399 400 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 401 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 402 status = avdtp_subevent_streaming_connection_established_get_status(packet); 403 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 404 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 405 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 406 if (status != 0){ 407 log_info("A2DP streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 408 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, status); 409 break; 410 } 411 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 412 app_state = A2DP_STREAMING_OPENED; 413 a2dp_streaming_emit_connection_established(a2dp_source_packet_handler_user, cid, address, local_seid, remote_seid, 0); 414 break; 415 416 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 417 avdtp_sep_t sep; 418 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 419 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 420 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 421 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 422 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %s (1-SNK), index %d", 423 sep.seid, sep.in_use, sep.media_type, sep.type == AVDTP_SOURCE ? "source" : "sink", num_remote_seps); 424 if (sep.type == AVDTP_SINK){ 425 remote_seps[num_remote_seps++] = sep; 426 } 427 break; 428 } 429 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 430 app_state = A2DP_W2_GET_CAPABILITIES; 431 sc.active_remote_sep_index = 0; 432 break; 433 434 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 435 // TODO check cid 436 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 437 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 438 log_info("A2DP cmd %s accepted , cid 0x%2x, local seid %d", avdtp_si2str(signal_identifier), cid, avdtp_subevent_signaling_accept_get_local_seid(packet)); 439 440 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) != 1) break; 441 442 switch (app_state){ 443 case A2DP_W2_GET_CAPABILITIES: 444 if (sc.active_remote_sep_index < num_remote_seps){ 445 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 446 log_info("A2DP get capabilities for remote seid %d", sc.active_remote_sep->seid); 447 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 448 } 449 break; 450 case A2DP_W2_SET_CONFIGURATION:{ 451 if (!sc.local_stream_endpoint) return; 452 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), sc.active_remote_sep->seid); 453 app_state = A2DP_IDLE; 454 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); 455 break; 456 } 457 case A2DP_W2_RECONFIGURE_WITH_SEID: 458 log_info("A2DP reconfigured ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 459 a2dp_signaling_emit_reconfigured(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 460 app_state = A2DP_STREAMING_OPENED; 461 break; 462 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 463 log_info("A2DP open stream ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 464 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 465 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 466 break; 467 } 468 case A2DP_STREAMING_OPENED: 469 if (!a2dp_source_packet_handler_user) return; 470 switch (signal_identifier){ 471 case AVDTP_SI_START: 472 a2dp_signaling_emit_control_command(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 473 break; 474 case AVDTP_SI_SUSPEND: 475 a2dp_signaling_emit_control_command(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 476 break; 477 case AVDTP_SI_ABORT: 478 case AVDTP_SI_CLOSE: 479 a2dp_signaling_emit_control_command(a2dp_source_packet_handler_user, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 480 break; 481 default: 482 break; 483 } 484 break; 485 default: 486 app_state = A2DP_IDLE; 487 break; 488 } 489 490 break; 491 case AVDTP_SUBEVENT_SIGNALING_REJECT: 492 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 493 app_state = A2DP_IDLE; 494 a2dp_signaling_emit_reject_cmd(a2dp_source_packet_handler_user, packet, size); 495 break; 496 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 497 app_state = A2DP_IDLE; 498 uint8_t event[6]; 499 int pos = 0; 500 event[pos++] = HCI_EVENT_A2DP_META; 501 event[pos++] = sizeof(event) - 2; 502 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 503 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 504 pos += 2; 505 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 506 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 507 break; 508 } 509 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 510 app_state = A2DP_IDLE; 511 uint8_t event[6]; 512 int pos = 0; 513 event[pos++] = HCI_EVENT_A2DP_META; 514 event[pos++] = sizeof(event) - 2; 515 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 516 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 517 pos += 2; 518 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 519 (*a2dp_source_packet_handler_user)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 520 break; 521 } 522 default: 523 app_state = A2DP_IDLE; 524 log_info("not implemented"); 525 break; 526 } 527 } 528 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 529 if (callback == NULL){ 530 log_error("a2dp_source_register_packet_handler called with NULL callback"); 531 return; 532 } 533 avdtp_source_register_packet_handler(&a2dp_source_packet_handler_internal); 534 a2dp_source_packet_handler_user = callback; 535 } 536 537 void a2dp_source_init(void){ 538 avdtp_source_init(&a2dp_source_context); 539 } 540 541 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 542 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 543 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 544 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 545 if (!local_stream_endpoint){ 546 return NULL; 547 } 548 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 549 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 550 codec_capabilities, codec_capabilities_len); 551 552 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 553 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 554 sc.local_stream_endpoint = local_stream_endpoint; 555 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 556 return local_stream_endpoint; 557 } 558 559 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 560 sc.local_stream_endpoint = avdtp_get_stream_endpoint_for_seid(loc_seid); 561 if (!sc.local_stream_endpoint){ 562 log_error(" no local_stream_endpoint for seid %d", loc_seid); 563 return AVDTP_SEID_DOES_NOT_EXIST; 564 } 565 (void)memcpy(sc.remote_addr, remote_addr, 6); 566 app_state = A2DP_W4_CONNECTED; 567 return avdtp_source_connect(remote_addr, a2dp_cid); 568 } 569 570 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 571 return avdtp_disconnect(a2dp_cid); 572 } 573 574 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 575 // UNUSED(sampling_frequency); 576 577 log_info("a2dp_source_reconfigure_stream"); 578 579 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 580 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 581 4); 582 583 // update sampling frequency 584 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 585 switch (sampling_frequency){ 586 case 48000: 587 config |= (AVDTP_SBC_48000 << 4); 588 break; 589 case 44100: 590 config |= (AVDTP_SBC_44100 << 4); 591 break; 592 case 32000: 593 config |= (AVDTP_SBC_32000 << 4); 594 break; 595 case 16000: 596 config |= (AVDTP_SBC_16000 << 4); 597 break; 598 default: 599 log_error("Unsupported sampling frequency %u", sampling_frequency); 600 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 601 } 602 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 603 604 avdtp_capabilities_t new_configuration; 605 new_configuration.media_codec.media_type = AVDTP_AUDIO; 606 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 607 new_configuration.media_codec.media_codec_information_len = 4; 608 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 609 610 // sttart reconfigure 611 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 612 return avdtp_source_reconfigure( 613 a2dp_cid, 614 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 615 sc.active_remote_sep->seid, 616 1 << AVDTP_MEDIA_CODEC, 617 new_configuration 618 ); 619 } 620 621 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 622 return avdtp_start_stream(a2dp_cid, local_seid); 623 } 624 625 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 626 return avdtp_suspend_stream(a2dp_cid, local_seid); 627 } 628 629 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 630 avdtp_source_stream_endpoint_request_can_send_now(a2dp_cid, local_seid); 631 } 632 633 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 634 return avdtp_max_media_payload_size(a2dp_cid, local_seid); 635 } 636 637 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){ 638 return avdtp_source_stream_send_media_payload(a2dp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 639 } 640