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 <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "classic/avdtp.h" 47 #include "classic/avdtp_util.h" 48 #include "classic/avdtp_source.h" 49 #include "classic/a2dp_source.h" 50 51 #define AVDTP_MAX_SEP_NUM 10 52 #define AVDTP_MEDIA_PAYLOAD_HEADER_SIZE 12 53 54 static const char * default_a2dp_source_service_name = "BTstack A2DP Source Service"; 55 static const char * default_a2dp_source_service_provider_name = "BTstack A2DP Source Service Provider"; 56 static avdtp_context_t a2dp_source_context; 57 58 static a2dp_state_t app_state = A2DP_IDLE; 59 static avdtp_stream_endpoint_context_t sc; 60 static avdtp_sep_t remote_seps[AVDTP_MAX_SEP_NUM]; 61 static int remote_seps_index = 0; 62 63 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 64 65 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){ 66 uint8_t* attribute; 67 de_create_sequence(service); 68 69 // 0x0000 "Service Record Handle" 70 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 71 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 72 73 // 0x0001 "Service Class ID List" 74 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 75 attribute = de_push_sequence(service); 76 { 77 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 78 } 79 de_pop_sequence(service, attribute); 80 81 // 0x0004 "Protocol Descriptor List" 82 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 83 attribute = de_push_sequence(service); 84 { 85 uint8_t* l2cpProtocol = de_push_sequence(attribute); 86 { 87 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 88 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 89 } 90 de_pop_sequence(attribute, l2cpProtocol); 91 92 uint8_t* avProtocol = de_push_sequence(attribute); 93 { 94 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 95 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 96 } 97 de_pop_sequence(attribute, avProtocol); 98 } 99 de_pop_sequence(service, attribute); 100 101 // 0x0005 "Public Browse Group" 102 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 103 attribute = de_push_sequence(service); 104 { 105 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 106 } 107 de_pop_sequence(service, attribute); 108 109 // 0x0009 "Bluetooth Profile Descriptor List" 110 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 111 attribute = de_push_sequence(service); 112 { 113 uint8_t *a2dProfile = de_push_sequence(attribute); 114 { 115 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 116 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 117 } 118 de_pop_sequence(attribute, a2dProfile); 119 } 120 de_pop_sequence(service, attribute); 121 122 123 // 0x0100 "Service Name" 124 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 125 if (service_name){ 126 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 127 } else { 128 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 129 } 130 131 // 0x0100 "Provider Name" 132 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 133 if (service_provider_name){ 134 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 135 } else { 136 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 137 } 138 139 // 0x0311 "Supported Features" 140 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 141 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 142 } 143 144 145 static void a2dp_streaming_emit_can_send_media_packet_now(btstack_packet_handler_t callback, uint16_t cid, uint8_t seid){ 146 if (!callback) return; 147 uint8_t event[8]; 148 int pos = 0; 149 event[pos++] = HCI_EVENT_A2DP_META; 150 event[pos++] = sizeof(event) - 2; 151 event[pos++] = A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW; 152 little_endian_store_16(event, pos, cid); 153 pos += 2; 154 event[pos++] = seid; 155 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static inline void a2dp_signaling_emit_delay_report_capability(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 159 if (!callback) return; 160 event[0] = HCI_EVENT_A2DP_META; 161 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY; 162 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 163 } 164 165 static inline void a2dp_signaling_emit_capabilities_done(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 166 if (!callback) return; 167 event[0] = HCI_EVENT_A2DP_META; 168 event[2] = A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE; 169 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 170 } 171 172 static inline void a2dp_signaling_emit_delay_report(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 173 if (!callback) return; 174 event[0] = HCI_EVENT_A2DP_META; 175 event[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 176 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 177 } 178 179 static inline void a2dp_signaling_emit_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 180 if (!callback) return; 181 if (event_size < 18) return; 182 event[0] = HCI_EVENT_A2DP_META; 183 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 184 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 185 } 186 187 static inline void a2dp_signaling_emit_reject_cmd(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 188 if (!callback) return; 189 if (event_size < 18) return; 190 event[0] = HCI_EVENT_A2DP_META; 191 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 192 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 193 } 194 195 static void a2dp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t status){ 196 if (!callback) return; 197 uint8_t event[12]; 198 int pos = 0; 199 event[pos++] = HCI_EVENT_A2DP_META; 200 event[pos++] = sizeof(event) - 2; 201 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 202 little_endian_store_16(event, pos, cid); 203 pos += 2; 204 reverse_bd_addr(addr,&event[pos]); 205 pos += 6; 206 event[pos++] = status; 207 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 208 } 209 210 static void a2dp_signaling_emit_control_command(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t cmd){ 211 if (!callback) return; 212 uint8_t event[6]; 213 int pos = 0; 214 event[pos++] = HCI_EVENT_A2DP_META; 215 event[pos++] = sizeof(event) - 2; 216 event[pos++] = cmd; 217 little_endian_store_16(event, pos, cid); 218 pos += 2; 219 event[pos++] = local_seid; 220 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 221 } 222 223 static void a2dp_signaling_emit_reconfigured(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t status){ 224 if (!callback) return; 225 uint8_t event[7]; 226 int pos = 0; 227 event[pos++] = HCI_EVENT_A2DP_META; 228 event[pos++] = sizeof(event) - 2; 229 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 230 little_endian_store_16(event, pos, cid); 231 pos += 2; 232 event[pos++] = local_seid; 233 event[pos++] = status; 234 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 235 } 236 237 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 238 UNUSED(channel); 239 UNUSED(size); 240 241 uint8_t signal_identifier; 242 uint8_t status; 243 uint8_t local_seid; 244 uint8_t remote_seid; 245 uint16_t cid; 246 bd_addr_t address; 247 248 if (packet_type != HCI_EVENT_PACKET) return; 249 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 250 251 switch (packet[2]){ 252 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 253 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 254 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 255 status = avdtp_subevent_signaling_connection_established_get_status(packet); 256 257 if (status != 0){ 258 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 259 app_state = A2DP_IDLE; 260 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 261 break; 262 } 263 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_cid); 264 sc.active_remote_sep = NULL; 265 sc.active_remote_sep_index = 0; 266 app_state = A2DP_W2_DISCOVER_SEPS; 267 remote_seps_index = 0; 268 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 269 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 270 avdtp_source_discover_stream_endpoints(cid); 271 break; 272 } 273 274 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 275 log_info("A2DP received SBC capability."); 276 if (!sc.local_stream_endpoint) { 277 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 278 return; 279 } 280 log_info("A2DP received SBC capability."); 281 282 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)); 283 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)); 284 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)); 285 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 286 287 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)); 288 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)); 289 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)); 290 291 292 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 293 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 294 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 295 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 296 297 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 298 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 299 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 300 301 app_state = A2DP_W2_SET_CONFIGURATION; 302 break; 303 } 304 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 305 log_info("received non SBC codec. not implemented"); 306 break; 307 308 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 309 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)); 310 break; 311 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 312 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 313 break; 314 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 315 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 316 break; 317 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 318 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)); 319 break; 320 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 321 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)); 322 break; 323 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 324 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 325 break; 326 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 327 a2dp_signaling_emit_delay_report_capability(a2dp_source_context.a2dp_callback, packet, size); 328 break; 329 case AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 330 a2dp_signaling_emit_capabilities_done(a2dp_source_context.a2dp_callback, packet, size); 331 break; 332 333 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 334 // forward packet: 335 a2dp_signaling_emit_delay_report(a2dp_source_context.a2dp_callback, packet, size); 336 break; 337 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 338 // TODO check cid 339 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 340 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 341 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 342 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 343 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 344 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 345 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 346 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 347 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 348 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 349 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 350 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 351 break; 352 } 353 354 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 355 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 356 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, 0); 357 break; 358 359 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 360 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 361 status = avdtp_subevent_streaming_connection_established_get_status(packet); 362 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 363 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 364 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 365 if (status != 0){ 366 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 367 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 368 break; 369 } 370 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 371 app_state = A2DP_STREAMING_OPENED; 372 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 373 break; 374 375 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 376 avdtp_sep_t sep; 377 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 378 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 379 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 380 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 381 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); 382 remote_seps[remote_seps_index++] = sep; 383 break; 384 } 385 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 386 app_state = A2DP_W2_GET_CAPABILITIES; 387 sc.active_remote_sep_index = 0; 388 break; 389 390 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 391 // TODO check cid 392 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 393 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 394 log_info("A2DP Accepted %d, state %d", signal_identifier, app_state); 395 396 switch (app_state){ 397 case A2DP_W2_GET_CAPABILITIES: 398 if (sc.active_remote_sep_index < remote_seps_index){ 399 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 400 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 401 } 402 break; 403 case A2DP_W2_SET_CONFIGURATION:{ 404 if (!sc.local_stream_endpoint) return; 405 log_info("A2DP initiate set configuration locally and wait for response ... "); 406 app_state = A2DP_IDLE; 407 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); 408 break; 409 } 410 case A2DP_W2_RECONFIGURE_WITH_SEID: 411 log_info("A2DP reconfigured"); 412 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 413 app_state = A2DP_STREAMING_OPENED; 414 break; 415 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 416 log_info("A2DP open stream "); 417 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 418 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 419 break; 420 } 421 case A2DP_STREAMING_OPENED: 422 if (!a2dp_source_context.a2dp_callback) return; 423 switch (signal_identifier){ 424 case AVDTP_SI_START: 425 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 426 break; 427 case AVDTP_SI_SUSPEND: 428 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 429 break; 430 case AVDTP_SI_ABORT: 431 case AVDTP_SI_CLOSE: 432 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 433 break; 434 default: 435 break; 436 } 437 break; 438 default: 439 app_state = A2DP_IDLE; 440 break; 441 } 442 443 break; 444 case AVDTP_SUBEVENT_SIGNALING_REJECT: 445 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 446 app_state = A2DP_IDLE; 447 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 448 break; 449 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 450 app_state = A2DP_IDLE; 451 uint8_t event[6]; 452 int pos = 0; 453 event[pos++] = HCI_EVENT_A2DP_META; 454 event[pos++] = sizeof(event) - 2; 455 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 456 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 457 pos += 2; 458 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 459 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 460 break; 461 } 462 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 463 app_state = A2DP_IDLE; 464 uint8_t event[6]; 465 int pos = 0; 466 event[pos++] = HCI_EVENT_A2DP_META; 467 event[pos++] = sizeof(event) - 2; 468 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 469 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 470 pos += 2; 471 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 472 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 473 break; 474 } 475 default: 476 app_state = A2DP_IDLE; 477 log_info("not implemented"); 478 break; 479 } 480 } 481 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 482 if (callback == NULL){ 483 log_error("a2dp_source_register_packet_handler called with NULL callback"); 484 return; 485 } 486 avdtp_source_register_packet_handler(&packet_handler); 487 a2dp_source_context.a2dp_callback = callback; 488 } 489 490 void a2dp_source_init(void){ 491 avdtp_source_init(&a2dp_source_context); 492 } 493 494 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 495 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 496 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 497 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 498 if (!local_stream_endpoint){ 499 return NULL; 500 } 501 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 502 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 503 codec_capabilities, codec_capabilities_len); 504 505 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 506 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 507 sc.local_stream_endpoint = local_stream_endpoint; 508 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 509 return local_stream_endpoint; 510 } 511 512 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 513 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 514 if (!sc.local_stream_endpoint){ 515 log_error(" no local_stream_endpoint for seid %d", loc_seid); 516 return AVDTP_SEID_DOES_NOT_EXIST; 517 } 518 memcpy(sc.remote_addr, remote_addr, 6); 519 return avdtp_source_connect(remote_addr, a2dp_cid); 520 } 521 522 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 523 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 524 } 525 526 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 527 // UNUSED(sampling_frequency); 528 529 log_info("a2dp_source_reconfigure_stream"); 530 531 memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 4); 532 533 // update sampling frequency 534 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 535 switch (sampling_frequency){ 536 case 48000: 537 config |= (AVDTP_SBC_48000 << 4); 538 break; 539 case 44100: 540 config |= (AVDTP_SBC_44100 << 4); 541 break; 542 case 32000: 543 config |= (AVDTP_SBC_32000 << 4); 544 break; 545 case 16000: 546 config |= (AVDTP_SBC_16000 << 4); 547 break; 548 default: 549 log_error("Unsupported sampling frequency %u", sampling_frequency); 550 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 551 } 552 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 553 554 avdtp_capabilities_t new_configuration; 555 new_configuration.media_codec.media_type = AVDTP_AUDIO; 556 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 557 new_configuration.media_codec.media_codec_information_len = 4; 558 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 559 560 // sttart reconfigure 561 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 562 return avdtp_source_reconfigure( 563 a2dp_cid, 564 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 565 sc.active_remote_sep->seid, 566 1 << AVDTP_MEDIA_CODEC, 567 new_configuration 568 ); 569 } 570 571 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 572 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 573 } 574 575 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 576 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 577 } 578 579 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 580 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 581 log_error("small outgoing buffer"); 582 return; 583 } 584 585 uint8_t rtp_version = 2; 586 uint8_t padding = 0; 587 uint8_t extension = 0; 588 uint8_t csrc_count = 0; 589 uint8_t payload_type = 0x60; 590 // uint16_t sequence_number = stream_endpoint->sequence_number; 591 uint32_t timestamp = btstack_run_loop_get_time_ms(); 592 uint32_t ssrc = 0x11223344; 593 594 // rtp header (min size 12B) 595 int pos = 0; 596 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 597 598 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 599 media_packet[pos++] = (marker << 1) | payload_type; 600 big_endian_store_16(media_packet, pos, sequence_number); 601 pos += 2; 602 big_endian_store_32(media_packet, pos, timestamp); 603 pos += 4; 604 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 605 pos += 4; 606 *offset = pos; 607 } 608 609 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 610 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 611 if (!stream_endpoint) { 612 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 613 return; 614 } 615 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 616 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 617 return; 618 } 619 stream_endpoint->send_stream = 1; 620 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 621 } 622 623 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 624 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 625 if (!stream_endpoint) { 626 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 627 return 0; 628 } 629 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 630 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 631 return 0; 632 } 633 634 if (stream_endpoint->l2cap_media_cid == 0){ 635 log_error("A2DP source: no media connection for seid %d", local_seid); 636 return 0; 637 } 638 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 639 } 640 641 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){ 642 if (size < num_bytes_to_copy + 1){ 643 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 644 return; 645 } 646 647 int pos = *offset; 648 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 649 memcpy(media_packet + pos, storage, num_bytes_to_copy); 650 pos += num_bytes_to_copy; 651 *offset = pos; 652 } 653 654 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){ 655 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 656 if (!stream_endpoint) { 657 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 658 return 0; 659 } 660 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 661 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 662 return 0; 663 } 664 665 if (stream_endpoint->l2cap_media_cid == 0){ 666 log_error("A2DP source: no media connection for seid %d", local_seid); 667 return 0; 668 } 669 670 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 671 int offset = 0; 672 673 l2cap_reserve_packet_buffer(); 674 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 675 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 676 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 677 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 678 stream_endpoint->sequence_number++; 679 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 680 return size; 681 } 682