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 56 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 57 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 58 static avdtp_context_t a2dp_source_context; 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 65 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 66 67 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){ 68 uint8_t* attribute; 69 de_create_sequence(service); 70 71 // 0x0000 "Service Record Handle" 72 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 73 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 74 75 // 0x0001 "Service Class ID List" 76 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 77 attribute = de_push_sequence(service); 78 { 79 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 80 } 81 de_pop_sequence(service, attribute); 82 83 // 0x0004 "Protocol Descriptor List" 84 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 85 attribute = de_push_sequence(service); 86 { 87 uint8_t* l2cpProtocol = de_push_sequence(attribute); 88 { 89 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 90 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 91 } 92 de_pop_sequence(attribute, l2cpProtocol); 93 94 uint8_t* avProtocol = de_push_sequence(attribute); 95 { 96 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 97 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 98 } 99 de_pop_sequence(attribute, avProtocol); 100 } 101 de_pop_sequence(service, attribute); 102 103 // 0x0005 "Public Browse Group" 104 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 105 attribute = de_push_sequence(service); 106 { 107 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 108 } 109 de_pop_sequence(service, attribute); 110 111 // 0x0009 "Bluetooth Profile Descriptor List" 112 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 113 attribute = de_push_sequence(service); 114 { 115 uint8_t *a2dProfile = de_push_sequence(attribute); 116 { 117 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 118 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 119 } 120 de_pop_sequence(attribute, a2dProfile); 121 } 122 de_pop_sequence(service, attribute); 123 124 125 // 0x0100 "Service Name" 126 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 127 if (service_name){ 128 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 129 } else { 130 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 131 } 132 133 // 0x0100 "Provider Name" 134 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 135 if (service_provider_name){ 136 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 137 } else { 138 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 139 } 140 141 // 0x0311 "Supported Features" 142 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 143 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 144 } 145 146 147 static void a2dp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 148 if (!callback) return; 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 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 158 } 159 160 static inline void a2dp_signaling_emit_delay_report_capability(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 161 if (!callback) return; 162 event[0] = HCI_EVENT_A2DP_META; 163 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 164 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 165 } 166 167 static inline void a2dp_signaling_emit_capabilities_done(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 168 if (!callback) return; 169 event[0] = HCI_EVENT_A2DP_META; 170 event[2] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 171 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 172 } 173 174 static inline void a2dp_signaling_emit_delay_report(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 175 if (!callback) return; 176 event[0] = HCI_EVENT_A2DP_META; 177 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 178 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 179 } 180 181 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 182 if (!callback) return; 183 if (event_size < 18) return; 184 event[0] = HCI_EVENT_A2DP_META; 185 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 186 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 187 } 188 189 static inline void a2dp_signaling_emit_reject_cmd(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 190 if (!callback) return; 191 if (event_size < 18) return; 192 event[0] = HCI_EVENT_A2DP_META; 193 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 194 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 195 } 196 197 static void a2dp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t status){ 198 if (!callback) return; 199 uint8_t event[12]; 200 int pos = 0; 201 event[pos++] = HCI_EVENT_A2DP_META; 202 event[pos++] = sizeof(event) - 2; 203 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 204 little_endian_store_16(event, pos, cid); 205 pos += 2; 206 reverse_bd_addr(addr,&event[pos]); 207 pos += 6; 208 event[pos++] = status; 209 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 210 } 211 212 static void a2dp_signaling_emit_control_command(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t cmd){ 213 if (!callback) return; 214 uint8_t event[6]; 215 int pos = 0; 216 event[pos++] = HCI_EVENT_A2DP_META; 217 event[pos++] = sizeof(event) - 2; 218 event[pos++] = cmd; 219 little_endian_store_16(event, pos, cid); 220 pos += 2; 221 event[pos++] = local_seid; 222 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 223 } 224 225 static void a2dp_signaling_emit_reconfigured(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t status){ 226 if (!callback) return; 227 uint8_t event[7]; 228 int pos = 0; 229 event[pos++] = HCI_EVENT_A2DP_META; 230 event[pos++] = sizeof(event) - 2; 231 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 232 little_endian_store_16(event, pos, cid); 233 pos += 2; 234 event[pos++] = local_seid; 235 event[pos++] = status; 236 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 237 } 238 239 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 240 UNUSED(channel); 241 UNUSED(size); 242 243 uint8_t signal_identifier; 244 uint8_t status; 245 uint8_t local_seid; 246 uint8_t remote_seid; 247 uint16_t cid; 248 bd_addr_t address; 249 250 if (packet_type != HCI_EVENT_PACKET) return; 251 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 252 253 switch (packet[2]){ 254 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 255 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 256 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 257 status = avdtp_subevent_signaling_connection_established_get_status(packet); 258 259 if (status != 0){ 260 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 261 app_state = A2DP_IDLE; 262 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 263 break; 264 } 265 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_cid); 266 sc.active_remote_sep = NULL; 267 sc.active_remote_sep_index = 0; 268 app_state = A2DP_W2_DISCOVER_SEPS; 269 num_remote_seps = 0; 270 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 271 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 272 avdtp_source_discover_stream_endpoints(cid); 273 break; 274 } 275 276 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 277 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 278 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 279 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 280 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid ); 281 282 if (!sc.local_stream_endpoint) { 283 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 284 return; 285 } 286 287 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)); 288 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)); 289 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)); 290 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 291 292 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)); 293 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)); 294 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)); 295 296 297 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 298 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 299 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 300 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 301 302 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 303 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 304 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 305 306 app_state = A2DP_W2_SET_CONFIGURATION; 307 break; 308 } 309 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 310 log_info("received non SBC codec. not implemented"); 311 break; 312 313 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 314 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)); 315 break; 316 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 317 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 318 break; 319 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 320 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 321 break; 322 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 323 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)); 324 break; 325 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 326 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)); 327 break; 328 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 329 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 330 break; 331 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 332 a2dp_signaling_emit_delay_report_capability(a2dp_source_context.a2dp_callback, packet, size); 333 break; 334 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 335 a2dp_signaling_emit_capabilities_done(a2dp_source_context.a2dp_callback, packet, size); 336 break; 337 338 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 339 // forward packet: 340 a2dp_signaling_emit_delay_report(a2dp_source_context.a2dp_callback, packet, size); 341 break; 342 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 343 // TODO check cid 344 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 345 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 346 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 347 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 348 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 349 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 350 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 351 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 352 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)); 353 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 354 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 355 break; 356 } 357 358 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 359 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 360 local_seid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 361 // log_info("A2DP STREAMING_CAN_SEND_MEDIA_PACKET_NOW cid 0x%02x, local_seid %d", cid, local_seid); 362 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, local_seid); 363 break; 364 365 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 366 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 367 status = avdtp_subevent_streaming_connection_established_get_status(packet); 368 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 369 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 370 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 371 if (status != 0){ 372 log_info("A2DP streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 373 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 374 break; 375 } 376 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 377 app_state = A2DP_STREAMING_OPENED; 378 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 379 break; 380 381 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 382 avdtp_sep_t sep; 383 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 384 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 385 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 386 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 387 log_info("A2DP Found sep: remote seid %u, in_use %d, media type %d, sep type %d (1-SNK), index %d", sep.seid, sep.in_use, sep.media_type, sep.type, num_remote_seps); 388 remote_seps[num_remote_seps++] = sep; 389 break; 390 } 391 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 392 app_state = A2DP_W2_GET_CAPABILITIES; 393 sc.active_remote_sep_index = 0; 394 break; 395 396 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 397 // TODO check cid 398 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 399 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 400 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)); 401 402 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) != 1) break; 403 404 switch (app_state){ 405 case A2DP_W2_GET_CAPABILITIES: 406 if (sc.active_remote_sep_index < num_remote_seps){ 407 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 408 log_info("A2DP get capabilities for remote seid %d", sc.active_remote_sep->seid); 409 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 410 } 411 break; 412 case A2DP_W2_SET_CONFIGURATION:{ 413 if (!sc.local_stream_endpoint) return; 414 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); 415 app_state = A2DP_IDLE; 416 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); 417 break; 418 } 419 case A2DP_W2_RECONFIGURE_WITH_SEID: 420 log_info("A2DP reconfigured ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 421 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 422 app_state = A2DP_STREAMING_OPENED; 423 break; 424 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 425 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); 426 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 427 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 428 break; 429 } 430 case A2DP_STREAMING_OPENED: 431 if (!a2dp_source_context.a2dp_callback) return; 432 switch (signal_identifier){ 433 case AVDTP_SI_START: 434 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 435 break; 436 case AVDTP_SI_SUSPEND: 437 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 438 break; 439 case AVDTP_SI_ABORT: 440 case AVDTP_SI_CLOSE: 441 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 442 break; 443 default: 444 break; 445 } 446 break; 447 default: 448 app_state = A2DP_IDLE; 449 break; 450 } 451 452 break; 453 case AVDTP_SUBEVENT_SIGNALING_REJECT: 454 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 455 app_state = A2DP_IDLE; 456 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 457 break; 458 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 459 app_state = A2DP_IDLE; 460 uint8_t event[6]; 461 int pos = 0; 462 event[pos++] = HCI_EVENT_A2DP_META; 463 event[pos++] = sizeof(event) - 2; 464 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 465 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 466 pos += 2; 467 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 468 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 469 break; 470 } 471 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 472 app_state = A2DP_IDLE; 473 uint8_t event[6]; 474 int pos = 0; 475 event[pos++] = HCI_EVENT_A2DP_META; 476 event[pos++] = sizeof(event) - 2; 477 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 478 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 479 pos += 2; 480 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 481 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 482 break; 483 } 484 default: 485 app_state = A2DP_IDLE; 486 log_info("not implemented"); 487 break; 488 } 489 } 490 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 491 if (callback == NULL){ 492 log_error("a2dp_source_register_packet_handler called with NULL callback"); 493 return; 494 } 495 avdtp_source_register_packet_handler(&packet_handler); 496 a2dp_source_context.a2dp_callback = callback; 497 } 498 499 void a2dp_source_init(void){ 500 avdtp_source_init(&a2dp_source_context); 501 } 502 503 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 504 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 505 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 506 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 507 if (!local_stream_endpoint){ 508 return NULL; 509 } 510 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 511 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 512 codec_capabilities, codec_capabilities_len); 513 514 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 515 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 516 sc.local_stream_endpoint = local_stream_endpoint; 517 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 518 return local_stream_endpoint; 519 } 520 521 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 522 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 523 if (!sc.local_stream_endpoint){ 524 log_error(" no local_stream_endpoint for seid %d", loc_seid); 525 return AVDTP_SEID_DOES_NOT_EXIST; 526 } 527 (void)memcpy(sc.remote_addr, remote_addr, 6); 528 return avdtp_source_connect(remote_addr, a2dp_cid); 529 } 530 531 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 532 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 533 } 534 535 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 536 // UNUSED(sampling_frequency); 537 538 log_info("a2dp_source_reconfigure_stream"); 539 540 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 541 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 542 4); 543 544 // update sampling frequency 545 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 546 switch (sampling_frequency){ 547 case 48000: 548 config |= (AVDTP_SBC_48000 << 4); 549 break; 550 case 44100: 551 config |= (AVDTP_SBC_44100 << 4); 552 break; 553 case 32000: 554 config |= (AVDTP_SBC_32000 << 4); 555 break; 556 case 16000: 557 config |= (AVDTP_SBC_16000 << 4); 558 break; 559 default: 560 log_error("Unsupported sampling frequency %u", sampling_frequency); 561 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 562 } 563 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 564 565 avdtp_capabilities_t new_configuration; 566 new_configuration.media_codec.media_type = AVDTP_AUDIO; 567 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 568 new_configuration.media_codec.media_codec_information_len = 4; 569 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 570 571 // sttart reconfigure 572 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 573 return avdtp_source_reconfigure( 574 a2dp_cid, 575 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 576 sc.active_remote_sep->seid, 577 1 << AVDTP_MEDIA_CODEC, 578 new_configuration 579 ); 580 } 581 582 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 583 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 584 } 585 586 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 587 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 588 } 589 590 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 591 avdtp_source_stream_endpoint_request_can_send_now(a2dp_cid, local_seid); 592 } 593 594 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 595 return avdtp_max_media_payload_size(a2dp_cid, local_seid); 596 } 597 598 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){ 599 return avdtp_source_stream_send_media_payload(a2dp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 600 } 601