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 67 static void packet_handler(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(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 150 if (!callback) return; 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 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 160 } 161 162 static inline void a2dp_signaling_emit_delay_report_capability(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 163 if (!callback) return; 164 event[0] = HCI_EVENT_A2DP_META; 165 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 166 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 167 } 168 169 static inline void a2dp_signaling_emit_capabilities_done(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 170 if (!callback) return; 171 event[0] = HCI_EVENT_A2DP_META; 172 event[2] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 173 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 174 } 175 176 static inline void a2dp_signaling_emit_delay_report(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 177 if (!callback) return; 178 event[0] = HCI_EVENT_A2DP_META; 179 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 180 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 181 } 182 183 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 184 if (!callback) return; 185 if (event_size < 18) return; 186 event[0] = HCI_EVENT_A2DP_META; 187 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 188 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 189 } 190 191 static inline void a2dp_signaling_emit_reject_cmd(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 192 if (!callback) return; 193 if (event_size < 18) return; 194 event[0] = HCI_EVENT_A2DP_META; 195 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 196 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 197 } 198 199 static void a2dp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t status){ 200 if (!callback) return; 201 uint8_t event[12]; 202 int pos = 0; 203 event[pos++] = HCI_EVENT_A2DP_META; 204 event[pos++] = sizeof(event) - 2; 205 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 206 little_endian_store_16(event, pos, cid); 207 pos += 2; 208 reverse_bd_addr(addr,&event[pos]); 209 pos += 6; 210 event[pos++] = status; 211 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 212 } 213 214 static void a2dp_signaling_emit_control_command(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t cmd){ 215 if (!callback) return; 216 uint8_t event[6]; 217 int pos = 0; 218 event[pos++] = HCI_EVENT_A2DP_META; 219 event[pos++] = sizeof(event) - 2; 220 event[pos++] = cmd; 221 little_endian_store_16(event, pos, cid); 222 pos += 2; 223 event[pos++] = local_seid; 224 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 225 } 226 227 static void a2dp_signaling_emit_reconfigured(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t status){ 228 if (!callback) return; 229 uint8_t event[7]; 230 int pos = 0; 231 event[pos++] = HCI_EVENT_A2DP_META; 232 event[pos++] = sizeof(event) - 2; 233 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 234 little_endian_store_16(event, pos, cid); 235 pos += 2; 236 event[pos++] = local_seid; 237 event[pos++] = status; 238 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 239 } 240 241 static void a2dp_source_set_config_timer_handler(btstack_timer_source_t * ts){ 242 UNUSED(ts); 243 log_info("a2dp_source_set_config_timer_handler, app state %u", app_state); 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 packet_handler(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("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 282 app_state = A2DP_IDLE; 283 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 284 break; 285 } 286 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_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 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION app_state %u", app_state); 296 if (app_state == A2DP_W4_CONNECTED){ 297 app_state = A2DP_W2_DISCOVER_SEPS; 298 avdtp_source_discover_stream_endpoints(sc.avdtp_cid); 299 } else { 300 app_state = A2DP_CONNECTED; 301 a2dp_source_set_config_timer_start(); 302 } 303 304 // notify app 305 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, ERROR_CODE_SUCCESS); 306 break; 307 } 308 309 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 310 log_info("A2DP received SBC capability, received: local seid %d, remote seid %d, expected: local seid %d, remote seid %d", 311 avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet), 312 avdtp_subevent_signaling_media_codec_sbc_capability_get_remote_seid(packet), 313 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid ); 314 315 if (!sc.local_stream_endpoint) { 316 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 317 return; 318 } 319 320 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)); 321 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)); 322 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)); 323 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 324 325 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)); 326 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)); 327 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)); 328 329 330 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 331 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 332 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 333 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 334 335 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 336 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 337 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 338 339 app_state = A2DP_W2_SET_CONFIGURATION; 340 break; 341 } 342 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 343 log_info("received non SBC codec. not implemented"); 344 break; 345 346 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 347 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)); 348 break; 349 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 350 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 351 break; 352 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 353 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 354 break; 355 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 356 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)); 357 break; 358 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 359 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)); 360 break; 361 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 362 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 363 break; 364 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 365 a2dp_signaling_emit_delay_report_capability(a2dp_source_context.a2dp_callback, packet, size); 366 break; 367 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 368 a2dp_signaling_emit_capabilities_done(a2dp_source_context.a2dp_callback, packet, size); 369 break; 370 371 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 372 // forward packet: 373 a2dp_signaling_emit_delay_report(a2dp_source_context.a2dp_callback, packet, size); 374 break; 375 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 376 // TODO check cid 377 a2dp_source_set_config_timer_stop(); 378 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 379 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 380 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 381 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 382 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 383 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 384 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 385 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 386 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)); 387 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 388 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 389 break; 390 } 391 392 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 393 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 394 local_seid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 395 // log_info("A2DP STREAMING_CAN_SEND_MEDIA_PACKET_NOW cid 0x%02x, local_seid %d", cid, local_seid); 396 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, local_seid); 397 break; 398 399 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 400 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 401 status = avdtp_subevent_streaming_connection_established_get_status(packet); 402 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 403 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 404 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 405 if (status != 0){ 406 log_info("A2DP streaming connection could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 407 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 408 break; 409 } 410 log_info("A2DP streaming connection established --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 411 app_state = A2DP_STREAMING_OPENED; 412 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 413 break; 414 415 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 416 avdtp_sep_t sep; 417 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 418 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 419 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 420 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 421 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); 422 remote_seps[num_remote_seps++] = sep; 423 break; 424 } 425 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 426 app_state = A2DP_W2_GET_CAPABILITIES; 427 sc.active_remote_sep_index = 0; 428 break; 429 430 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 431 // TODO check cid 432 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 433 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 434 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)); 435 436 if (avdtp_subevent_signaling_accept_get_is_initiator(packet) != 1) break; 437 438 switch (app_state){ 439 case A2DP_W2_GET_CAPABILITIES: 440 if (sc.active_remote_sep_index < num_remote_seps){ 441 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 442 log_info("A2DP get capabilities for remote seid %d", sc.active_remote_sep->seid); 443 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 444 } 445 break; 446 case A2DP_W2_SET_CONFIGURATION:{ 447 if (!sc.local_stream_endpoint) return; 448 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); 449 app_state = A2DP_IDLE; 450 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); 451 break; 452 } 453 case A2DP_W2_RECONFIGURE_WITH_SEID: 454 log_info("A2DP reconfigured ... local seid %d, active remote seid %d", avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 455 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 456 app_state = A2DP_STREAMING_OPENED; 457 break; 458 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 459 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); 460 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 461 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 462 break; 463 } 464 case A2DP_STREAMING_OPENED: 465 if (!a2dp_source_context.a2dp_callback) return; 466 switch (signal_identifier){ 467 case AVDTP_SI_START: 468 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 469 break; 470 case AVDTP_SI_SUSPEND: 471 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 472 break; 473 case AVDTP_SI_ABORT: 474 case AVDTP_SI_CLOSE: 475 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 476 break; 477 default: 478 break; 479 } 480 break; 481 default: 482 app_state = A2DP_IDLE; 483 break; 484 } 485 486 break; 487 case AVDTP_SUBEVENT_SIGNALING_REJECT: 488 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 489 app_state = A2DP_IDLE; 490 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 491 break; 492 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 493 app_state = A2DP_IDLE; 494 uint8_t event[6]; 495 int pos = 0; 496 event[pos++] = HCI_EVENT_A2DP_META; 497 event[pos++] = sizeof(event) - 2; 498 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 499 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 500 pos += 2; 501 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 502 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 503 break; 504 } 505 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 506 app_state = A2DP_IDLE; 507 uint8_t event[6]; 508 int pos = 0; 509 event[pos++] = HCI_EVENT_A2DP_META; 510 event[pos++] = sizeof(event) - 2; 511 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 512 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 513 pos += 2; 514 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 515 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 516 break; 517 } 518 default: 519 app_state = A2DP_IDLE; 520 log_info("not implemented"); 521 break; 522 } 523 } 524 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 525 if (callback == NULL){ 526 log_error("a2dp_source_register_packet_handler called with NULL callback"); 527 return; 528 } 529 avdtp_source_register_packet_handler(&packet_handler); 530 a2dp_source_context.a2dp_callback = callback; 531 } 532 533 void a2dp_source_init(void){ 534 avdtp_source_init(&a2dp_source_context); 535 } 536 537 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 538 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 539 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 540 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 541 if (!local_stream_endpoint){ 542 return NULL; 543 } 544 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 545 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 546 codec_capabilities, codec_capabilities_len); 547 548 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 549 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 550 sc.local_stream_endpoint = local_stream_endpoint; 551 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 552 return local_stream_endpoint; 553 } 554 555 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 556 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 557 if (!sc.local_stream_endpoint){ 558 log_error(" no local_stream_endpoint for seid %d", loc_seid); 559 return AVDTP_SEID_DOES_NOT_EXIST; 560 } 561 (void)memcpy(sc.remote_addr, remote_addr, 6); 562 app_state = A2DP_W4_CONNECTED; 563 return avdtp_source_connect(remote_addr, a2dp_cid); 564 } 565 566 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 567 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 568 } 569 570 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 571 // UNUSED(sampling_frequency); 572 573 log_info("a2dp_source_reconfigure_stream"); 574 575 (void)memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, 576 sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 577 4); 578 579 // update sampling frequency 580 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 581 switch (sampling_frequency){ 582 case 48000: 583 config |= (AVDTP_SBC_48000 << 4); 584 break; 585 case 44100: 586 config |= (AVDTP_SBC_44100 << 4); 587 break; 588 case 32000: 589 config |= (AVDTP_SBC_32000 << 4); 590 break; 591 case 16000: 592 config |= (AVDTP_SBC_16000 << 4); 593 break; 594 default: 595 log_error("Unsupported sampling frequency %u", sampling_frequency); 596 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 597 } 598 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 599 600 avdtp_capabilities_t new_configuration; 601 new_configuration.media_codec.media_type = AVDTP_AUDIO; 602 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 603 new_configuration.media_codec.media_codec_information_len = 4; 604 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 605 606 // sttart reconfigure 607 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 608 return avdtp_source_reconfigure( 609 a2dp_cid, 610 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 611 sc.active_remote_sep->seid, 612 1 << AVDTP_MEDIA_CODEC, 613 new_configuration 614 ); 615 } 616 617 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 618 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 619 } 620 621 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 622 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 623 } 624 625 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 626 avdtp_source_stream_endpoint_request_can_send_now(a2dp_cid, local_seid); 627 } 628 629 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 630 return avdtp_max_media_payload_size(a2dp_cid, local_seid); 631 } 632 633 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){ 634 return avdtp_source_stream_send_media_payload(a2dp_cid, local_seid, storage, num_bytes_to_copy, num_frames, marker); 635 } 636