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