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 AVDTP_MEDIA_PAYLOAD_HEADER_SIZE 12 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 remote_seps_index = 0; 65 66 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 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){ 69 uint8_t* attribute; 70 de_create_sequence(service); 71 72 // 0x0000 "Service Record Handle" 73 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 74 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 75 76 // 0x0001 "Service Class ID List" 77 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 78 attribute = de_push_sequence(service); 79 { 80 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 81 } 82 de_pop_sequence(service, attribute); 83 84 // 0x0004 "Protocol Descriptor List" 85 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 86 attribute = de_push_sequence(service); 87 { 88 uint8_t* l2cpProtocol = de_push_sequence(attribute); 89 { 90 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 91 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVDTP); 92 } 93 de_pop_sequence(attribute, l2cpProtocol); 94 95 uint8_t* avProtocol = de_push_sequence(attribute); 96 { 97 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 98 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 99 } 100 de_pop_sequence(attribute, avProtocol); 101 } 102 de_pop_sequence(service, attribute); 103 104 // 0x0005 "Public Browse Group" 105 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 106 attribute = de_push_sequence(service); 107 { 108 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 109 } 110 de_pop_sequence(service, attribute); 111 112 // 0x0009 "Bluetooth Profile Descriptor List" 113 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 114 attribute = de_push_sequence(service); 115 { 116 uint8_t *a2dProfile = de_push_sequence(attribute); 117 { 118 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 119 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 120 } 121 de_pop_sequence(attribute, a2dProfile); 122 } 123 de_pop_sequence(service, attribute); 124 125 126 // 0x0100 "Service Name" 127 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 128 if (service_name){ 129 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 130 } else { 131 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 132 } 133 134 // 0x0100 "Provider Name" 135 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 136 if (service_provider_name){ 137 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 138 } else { 139 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 140 } 141 142 // 0x0311 "Supported Features" 143 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 144 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 145 } 146 147 148 static void a2dp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 149 if (!callback) return; 150 uint8_t event[8]; 151 int pos = 0; 152 event[pos++] = HCI_EVENT_A2DP_META; 153 event[pos++] = sizeof(event) - 2; 154 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 155 little_endian_store_16(event, pos, cid); 156 pos += 2; 157 event[pos++] = seid; 158 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 159 } 160 161 static inline void a2dp_signaling_emit_delay_report_capability(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 162 if (!callback) return; 163 event[0] = HCI_EVENT_A2DP_META; 164 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 165 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 166 } 167 168 static inline void a2dp_signaling_emit_capabilities_done(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 169 if (!callback) return; 170 event[0] = HCI_EVENT_A2DP_META; 171 event[2] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 172 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 173 } 174 175 static inline void a2dp_signaling_emit_delay_report(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 176 if (!callback) return; 177 event[0] = HCI_EVENT_A2DP_META; 178 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 179 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 180 } 181 182 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 183 if (!callback) return; 184 if (event_size < 18) return; 185 event[0] = HCI_EVENT_A2DP_META; 186 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 187 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 188 } 189 190 static inline void a2dp_signaling_emit_reject_cmd(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 191 if (!callback) return; 192 if (event_size < 18) return; 193 event[0] = HCI_EVENT_A2DP_META; 194 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 195 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 196 } 197 198 static void a2dp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t status){ 199 if (!callback) return; 200 uint8_t event[12]; 201 int pos = 0; 202 event[pos++] = HCI_EVENT_A2DP_META; 203 event[pos++] = sizeof(event) - 2; 204 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 205 little_endian_store_16(event, pos, cid); 206 pos += 2; 207 reverse_bd_addr(addr,&event[pos]); 208 pos += 6; 209 event[pos++] = status; 210 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 211 } 212 213 static void a2dp_signaling_emit_control_command(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t cmd){ 214 if (!callback) return; 215 uint8_t event[6]; 216 int pos = 0; 217 event[pos++] = HCI_EVENT_A2DP_META; 218 event[pos++] = sizeof(event) - 2; 219 event[pos++] = cmd; 220 little_endian_store_16(event, pos, cid); 221 pos += 2; 222 event[pos++] = local_seid; 223 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 224 } 225 226 static void a2dp_signaling_emit_reconfigured(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t status){ 227 if (!callback) return; 228 uint8_t event[7]; 229 int pos = 0; 230 event[pos++] = HCI_EVENT_A2DP_META; 231 event[pos++] = sizeof(event) - 2; 232 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 233 little_endian_store_16(event, pos, cid); 234 pos += 2; 235 event[pos++] = local_seid; 236 event[pos++] = status; 237 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 238 } 239 240 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 241 UNUSED(channel); 242 UNUSED(size); 243 244 uint8_t signal_identifier; 245 uint8_t status; 246 uint8_t local_seid; 247 uint8_t remote_seid; 248 uint16_t cid; 249 bd_addr_t address; 250 251 if (packet_type != HCI_EVENT_PACKET) return; 252 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 253 254 switch (packet[2]){ 255 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 256 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 257 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 258 status = avdtp_subevent_signaling_connection_established_get_status(packet); 259 260 if (status != 0){ 261 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 262 app_state = A2DP_IDLE; 263 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 264 break; 265 } 266 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_cid); 267 sc.active_remote_sep = NULL; 268 sc.active_remote_sep_index = 0; 269 app_state = A2DP_W2_DISCOVER_SEPS; 270 remote_seps_index = 0; 271 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 272 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 273 avdtp_source_discover_stream_endpoints(cid); 274 break; 275 } 276 277 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 278 log_info("A2DP received SBC capability."); 279 if (!sc.local_stream_endpoint) { 280 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 281 return; 282 } 283 log_info("A2DP received SBC capability."); 284 285 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)); 286 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)); 287 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)); 288 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 289 290 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)); 291 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)); 292 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)); 293 294 295 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 296 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 297 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 298 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 299 300 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 301 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 302 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 303 304 app_state = A2DP_W2_SET_CONFIGURATION; 305 break; 306 } 307 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 308 log_info("received non SBC codec. not implemented"); 309 break; 310 311 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 312 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)); 313 break; 314 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 315 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 316 break; 317 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 318 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 319 break; 320 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 321 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)); 322 break; 323 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 324 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)); 325 break; 326 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 327 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 328 break; 329 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 330 a2dp_signaling_emit_delay_report_capability(a2dp_source_context.a2dp_callback, packet, size); 331 break; 332 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 333 a2dp_signaling_emit_capabilities_done(a2dp_source_context.a2dp_callback, packet, size); 334 break; 335 336 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 337 // forward packet: 338 a2dp_signaling_emit_delay_report(a2dp_source_context.a2dp_callback, packet, size); 339 break; 340 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 341 // TODO check cid 342 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 343 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 344 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 345 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 346 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 347 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 348 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 349 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 350 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 351 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 352 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 353 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 354 break; 355 } 356 357 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 358 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 359 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, 0); 360 break; 361 362 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 363 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 364 status = avdtp_subevent_streaming_connection_established_get_status(packet); 365 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 366 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 367 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 368 if (status != 0){ 369 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 370 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 371 break; 372 } 373 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 374 app_state = A2DP_STREAMING_OPENED; 375 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 376 break; 377 378 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 379 avdtp_sep_t sep; 380 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 381 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 382 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 383 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 384 log_info("Found sep: seid %u, in_use %d, media type %d, sep type %d (1-SNK)", sep.seid, sep.in_use, sep.media_type, sep.type); 385 remote_seps[remote_seps_index++] = sep; 386 break; 387 } 388 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 389 app_state = A2DP_W2_GET_CAPABILITIES; 390 sc.active_remote_sep_index = 0; 391 break; 392 393 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 394 // TODO check cid 395 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 396 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 397 log_info("A2DP Accepted %d, state %d", signal_identifier, app_state); 398 399 switch (app_state){ 400 case A2DP_W2_GET_CAPABILITIES: 401 if (sc.active_remote_sep_index < remote_seps_index){ 402 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 403 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 404 } 405 break; 406 case A2DP_W2_SET_CONFIGURATION:{ 407 if (!sc.local_stream_endpoint) return; 408 log_info("A2DP initiate set configuration locally and wait for response ... "); 409 app_state = A2DP_IDLE; 410 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); 411 break; 412 } 413 case A2DP_W2_RECONFIGURE_WITH_SEID: 414 log_info("A2DP reconfigured"); 415 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 416 app_state = A2DP_STREAMING_OPENED; 417 break; 418 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 419 log_info("A2DP open stream "); 420 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 421 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 422 break; 423 } 424 case A2DP_STREAMING_OPENED: 425 if (!a2dp_source_context.a2dp_callback) return; 426 switch (signal_identifier){ 427 case AVDTP_SI_START: 428 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 429 break; 430 case AVDTP_SI_SUSPEND: 431 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 432 break; 433 case AVDTP_SI_ABORT: 434 case AVDTP_SI_CLOSE: 435 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 436 break; 437 default: 438 break; 439 } 440 break; 441 default: 442 app_state = A2DP_IDLE; 443 break; 444 } 445 446 break; 447 case AVDTP_SUBEVENT_SIGNALING_REJECT: 448 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 449 app_state = A2DP_IDLE; 450 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 451 break; 452 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 453 app_state = A2DP_IDLE; 454 uint8_t event[6]; 455 int pos = 0; 456 event[pos++] = HCI_EVENT_A2DP_META; 457 event[pos++] = sizeof(event) - 2; 458 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 459 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 460 pos += 2; 461 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 462 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 463 break; 464 } 465 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 466 app_state = A2DP_IDLE; 467 uint8_t event[6]; 468 int pos = 0; 469 event[pos++] = HCI_EVENT_A2DP_META; 470 event[pos++] = sizeof(event) - 2; 471 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 472 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 473 pos += 2; 474 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 475 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 476 break; 477 } 478 default: 479 app_state = A2DP_IDLE; 480 log_info("not implemented"); 481 break; 482 } 483 } 484 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 485 if (callback == NULL){ 486 log_error("a2dp_source_register_packet_handler called with NULL callback"); 487 return; 488 } 489 avdtp_source_register_packet_handler(&packet_handler); 490 a2dp_source_context.a2dp_callback = callback; 491 } 492 493 void a2dp_source_init(void){ 494 avdtp_source_init(&a2dp_source_context); 495 } 496 497 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 498 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 499 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 500 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 501 if (!local_stream_endpoint){ 502 return NULL; 503 } 504 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 505 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 506 codec_capabilities, codec_capabilities_len); 507 508 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 509 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 510 sc.local_stream_endpoint = local_stream_endpoint; 511 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 512 return local_stream_endpoint; 513 } 514 515 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 516 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 517 if (!sc.local_stream_endpoint){ 518 log_error(" no local_stream_endpoint for seid %d", loc_seid); 519 return AVDTP_SEID_DOES_NOT_EXIST; 520 } 521 memcpy(sc.remote_addr, remote_addr, 6); 522 return avdtp_source_connect(remote_addr, a2dp_cid); 523 } 524 525 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 526 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 527 } 528 529 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 530 // UNUSED(sampling_frequency); 531 532 log_info("a2dp_source_reconfigure_stream"); 533 534 memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 4); 535 536 // update sampling frequency 537 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 538 switch (sampling_frequency){ 539 case 48000: 540 config |= (AVDTP_SBC_48000 << 4); 541 break; 542 case 44100: 543 config |= (AVDTP_SBC_44100 << 4); 544 break; 545 case 32000: 546 config |= (AVDTP_SBC_32000 << 4); 547 break; 548 case 16000: 549 config |= (AVDTP_SBC_16000 << 4); 550 break; 551 default: 552 log_error("Unsupported sampling frequency %u", sampling_frequency); 553 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 554 } 555 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 556 557 avdtp_capabilities_t new_configuration; 558 new_configuration.media_codec.media_type = AVDTP_AUDIO; 559 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 560 new_configuration.media_codec.media_codec_information_len = 4; 561 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 562 563 // sttart reconfigure 564 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 565 return avdtp_source_reconfigure( 566 a2dp_cid, 567 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 568 sc.active_remote_sep->seid, 569 1 << AVDTP_MEDIA_CODEC, 570 new_configuration 571 ); 572 } 573 574 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 575 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 576 } 577 578 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 579 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 580 } 581 582 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 583 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 584 log_error("small outgoing buffer"); 585 return; 586 } 587 588 uint8_t rtp_version = 2; 589 uint8_t padding = 0; 590 uint8_t extension = 0; 591 uint8_t csrc_count = 0; 592 uint8_t payload_type = 0x60; 593 // uint16_t sequence_number = stream_endpoint->sequence_number; 594 uint32_t timestamp = btstack_run_loop_get_time_ms(); 595 uint32_t ssrc = 0x11223344; 596 597 // rtp header (min size 12B) 598 int pos = 0; 599 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 600 601 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 602 media_packet[pos++] = (marker << 1) | payload_type; 603 big_endian_store_16(media_packet, pos, sequence_number); 604 pos += 2; 605 big_endian_store_32(media_packet, pos, timestamp); 606 pos += 4; 607 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 608 pos += 4; 609 *offset = pos; 610 } 611 612 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 613 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 614 if (!stream_endpoint) { 615 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 616 return; 617 } 618 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 619 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 620 return; 621 } 622 stream_endpoint->send_stream = 1; 623 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 624 } 625 626 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 627 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 628 if (!stream_endpoint) { 629 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 630 return 0; 631 } 632 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 633 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 634 return 0; 635 } 636 637 if (stream_endpoint->l2cap_media_cid == 0){ 638 log_error("A2DP source: no media connection for seid %d", local_seid); 639 return 0; 640 } 641 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 642 } 643 644 static void a2dp_source_copy_media_payload(uint8_t * media_packet, int size, int * offset, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames){ 645 if (size < num_bytes_to_copy + 1){ 646 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 647 return; 648 } 649 650 int pos = *offset; 651 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 652 memcpy(media_packet + pos, storage, num_bytes_to_copy); 653 pos += num_bytes_to_copy; 654 *offset = pos; 655 } 656 657 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){ 658 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 659 if (!stream_endpoint) { 660 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 661 return 0; 662 } 663 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 664 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 665 return 0; 666 } 667 668 if (stream_endpoint->l2cap_media_cid == 0){ 669 log_error("A2DP source: no media connection for seid %d", local_seid); 670 return 0; 671 } 672 673 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 674 int offset = 0; 675 676 l2cap_reserve_packet_buffer(); 677 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 678 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 679 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 680 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 681 stream_endpoint->sequence_number++; 682 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 683 return size; 684 } 685