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_media_codec_sbc(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 159 if (!callback) return; 160 if (event_size < 18) return; 161 event[0] = HCI_EVENT_A2DP_META; 162 event[2] = A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION; 163 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 164 } 165 166 static inline void a2dp_signaling_emit_reject_cmd(btstack_packet_handler_t callback, uint8_t * event, uint16_t event_size){ 167 if (!callback) return; 168 if (event_size < 18) return; 169 event[0] = HCI_EVENT_A2DP_META; 170 event[2] = A2DP_SUBEVENT_COMMAND_REJECTED; 171 (*callback)(HCI_EVENT_PACKET, 0, event, event_size); 172 } 173 174 static void a2dp_signaling_emit_connection_established(btstack_packet_handler_t callback, uint16_t cid, bd_addr_t addr, uint8_t status){ 175 if (!callback) return; 176 uint8_t event[12]; 177 int pos = 0; 178 event[pos++] = HCI_EVENT_A2DP_META; 179 event[pos++] = sizeof(event) - 2; 180 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED; 181 little_endian_store_16(event, pos, cid); 182 pos += 2; 183 reverse_bd_addr(addr,&event[pos]); 184 pos += 6; 185 event[pos++] = status; 186 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 187 } 188 189 static void a2dp_signaling_emit_control_command(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t cmd){ 190 if (!callback) return; 191 uint8_t event[6]; 192 int pos = 0; 193 event[pos++] = HCI_EVENT_A2DP_META; 194 event[pos++] = sizeof(event) - 2; 195 event[pos++] = cmd; 196 little_endian_store_16(event, pos, cid); 197 pos += 2; 198 event[pos++] = local_seid; 199 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 200 } 201 202 static void a2dp_signaling_emit_reconfigured(btstack_packet_handler_t callback, uint16_t cid, uint8_t local_seid, uint8_t status){ 203 if (!callback) return; 204 uint8_t event[7]; 205 int pos = 0; 206 event[pos++] = HCI_EVENT_A2DP_META; 207 event[pos++] = sizeof(event) - 2; 208 event[pos++] = A2DP_SUBEVENT_STREAM_RECONFIGURED; 209 little_endian_store_16(event, pos, cid); 210 pos += 2; 211 event[pos++] = local_seid; 212 event[pos++] = status; 213 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 214 } 215 216 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 217 UNUSED(channel); 218 UNUSED(size); 219 220 uint8_t signal_identifier; 221 uint8_t status; 222 uint8_t local_seid; 223 uint8_t remote_seid; 224 uint16_t cid; 225 bd_addr_t address; 226 227 if (packet_type != HCI_EVENT_PACKET) return; 228 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 229 230 switch (packet[2]){ 231 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 232 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 233 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 234 status = avdtp_subevent_signaling_connection_established_get_status(packet); 235 236 if (status != 0){ 237 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 238 app_state = A2DP_IDLE; 239 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 240 break; 241 } 242 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_cid); 243 sc.active_remote_sep = NULL; 244 sc.active_remote_sep_index = 0; 245 app_state = A2DP_W2_DISCOVER_SEPS; 246 remote_seps_index = 0; 247 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 248 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 249 avdtp_source_discover_stream_endpoints(cid); 250 break; 251 } 252 253 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 254 log_info("A2DP received SBC capability."); 255 if (!sc.local_stream_endpoint) { 256 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 257 return; 258 } 259 log_info("A2DP received SBC capability."); 260 261 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)); 262 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)); 263 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)); 264 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 265 266 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)); 267 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)); 268 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)); 269 270 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 271 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 272 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 273 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 274 275 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 276 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 277 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 278 279 app_state = A2DP_W2_SET_CONFIGURATION; 280 break; 281 } 282 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 283 log_info("received non SBC codec. not implemented"); 284 break; 285 286 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 287 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_media_transport_capability_get_remote_seid(packet)); 288 break; 289 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 290 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 291 break; 292 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 293 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_delay_reporting_capability_get_remote_seid(packet)); 294 break; 295 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 296 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 297 break; 298 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 299 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_content_protection_capability_get_remote_seid(packet)); 300 break; 301 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 302 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_header_compression_capability_get_remote_seid(packet)); 303 break; 304 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 305 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 306 break; 307 case AVDTP_SUBEVENT_SIGNALING_CAPABILITY_DONE: 308 break; 309 310 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 311 // TODO check cid 312 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 313 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 314 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 315 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet) - 1; 316 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 317 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 318 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 319 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 320 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 321 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 322 break; 323 } 324 325 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 326 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 327 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, 0); 328 break; 329 330 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 331 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 332 status = avdtp_subevent_streaming_connection_established_get_status(packet); 333 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 334 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 335 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 336 if (status != 0){ 337 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 338 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 339 break; 340 } 341 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 342 app_state = A2DP_STREAMING_OPENED; 343 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 344 break; 345 346 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 347 avdtp_sep_t sep; 348 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 349 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 350 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 351 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 352 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); 353 remote_seps[remote_seps_index++] = sep; 354 break; 355 } 356 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 357 app_state = A2DP_W2_GET_CAPABILITIES; 358 sc.active_remote_sep_index = 0; 359 break; 360 361 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 362 // TODO check cid 363 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 364 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 365 log_info("A2DP Accepted %d, state %d", signal_identifier, app_state); 366 367 switch (app_state){ 368 case A2DP_W2_GET_CAPABILITIES: 369 if (sc.active_remote_sep_index < remote_seps_index){ 370 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 371 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 372 } 373 break; 374 case A2DP_W2_SET_CONFIGURATION:{ 375 if (!sc.local_stream_endpoint) return; 376 log_info("A2DP initiate set configuration locally and wait for response ... "); 377 app_state = A2DP_IDLE; 378 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); 379 break; 380 } 381 case A2DP_W2_RECONFIGURE_WITH_SEID: 382 log_info("A2DP reconfigured"); 383 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 384 app_state = A2DP_STREAMING_OPENED; 385 break; 386 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 387 log_info("A2DP open stream "); 388 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 389 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 390 break; 391 } 392 case A2DP_STREAMING_OPENED: 393 if (!a2dp_source_context.a2dp_callback) return; 394 switch (signal_identifier){ 395 case AVDTP_SI_START: 396 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 397 break; 398 case AVDTP_SI_SUSPEND: 399 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 400 break; 401 case AVDTP_SI_ABORT: 402 case AVDTP_SI_CLOSE: 403 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 404 break; 405 default: 406 break; 407 } 408 break; 409 default: 410 app_state = A2DP_IDLE; 411 break; 412 } 413 414 break; 415 case AVDTP_SUBEVENT_SIGNALING_REJECT: 416 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 417 app_state = A2DP_IDLE; 418 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 419 break; 420 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 421 app_state = A2DP_IDLE; 422 uint8_t event[6]; 423 int pos = 0; 424 event[pos++] = HCI_EVENT_A2DP_META; 425 event[pos++] = sizeof(event) - 2; 426 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 427 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 428 pos += 2; 429 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 430 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 431 break; 432 } 433 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 434 app_state = A2DP_IDLE; 435 uint8_t event[6]; 436 int pos = 0; 437 event[pos++] = HCI_EVENT_A2DP_META; 438 event[pos++] = sizeof(event) - 2; 439 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 440 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 441 pos += 2; 442 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 443 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 444 break; 445 } 446 default: 447 app_state = A2DP_IDLE; 448 log_info("not implemented"); 449 break; 450 } 451 } 452 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 453 if (callback == NULL){ 454 log_error("a2dp_source_register_packet_handler called with NULL callback"); 455 return; 456 } 457 avdtp_source_register_packet_handler(&packet_handler); 458 a2dp_source_context.a2dp_callback = callback; 459 } 460 461 void a2dp_source_init(void){ 462 avdtp_source_init(&a2dp_source_context); 463 } 464 465 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 466 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 467 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 468 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 469 if (!local_stream_endpoint){ 470 return NULL; 471 } 472 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 473 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 474 codec_capabilities, codec_capabilities_len); 475 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 476 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 477 sc.local_stream_endpoint = local_stream_endpoint; 478 return local_stream_endpoint; 479 } 480 481 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 482 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 483 if (!sc.local_stream_endpoint){ 484 log_error(" no local_stream_endpoint for seid %d", loc_seid); 485 return AVDTP_SEID_DOES_NOT_EXIST; 486 } 487 memcpy(sc.remote_addr, remote_addr, 6); 488 return avdtp_source_connect(remote_addr, a2dp_cid); 489 } 490 491 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 492 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 493 } 494 495 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 496 // UNUSED(sampling_frequency); 497 498 log_info("a2dp_source_reconfigure_stream"); 499 500 memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 4); 501 502 // update sampling frequency 503 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 504 switch (sampling_frequency){ 505 case 48000: 506 config |= (AVDTP_SBC_48000 << 4); 507 break; 508 case 44100: 509 config |= (AVDTP_SBC_44100 << 4); 510 break; 511 case 32000: 512 config |= (AVDTP_SBC_32000 << 4); 513 break; 514 case 16000: 515 config |= (AVDTP_SBC_16000 << 4); 516 break; 517 default: 518 log_error("Unsupported sampling frequency %u", sampling_frequency); 519 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 520 } 521 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 522 523 avdtp_capabilities_t new_configuration; 524 new_configuration.media_codec.media_type = AVDTP_AUDIO; 525 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 526 new_configuration.media_codec.media_codec_information_len = 4; 527 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 528 529 // sttart reconfigure 530 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 531 return avdtp_source_reconfigure( 532 a2dp_cid, 533 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 534 sc.active_remote_sep->seid, 535 1 << AVDTP_MEDIA_CODEC, 536 new_configuration 537 ); 538 } 539 540 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 541 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 542 } 543 544 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 545 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 546 } 547 548 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 549 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 550 log_error("small outgoing buffer"); 551 return; 552 } 553 554 uint8_t rtp_version = 2; 555 uint8_t padding = 0; 556 uint8_t extension = 0; 557 uint8_t csrc_count = 0; 558 uint8_t payload_type = 0x60; 559 // uint16_t sequence_number = stream_endpoint->sequence_number; 560 uint32_t timestamp = btstack_run_loop_get_time_ms(); 561 uint32_t ssrc = 0x11223344; 562 563 // rtp header (min size 12B) 564 int pos = 0; 565 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 566 567 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 568 media_packet[pos++] = (marker << 1) | payload_type; 569 big_endian_store_16(media_packet, pos, sequence_number); 570 pos += 2; 571 big_endian_store_32(media_packet, pos, timestamp); 572 pos += 4; 573 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 574 pos += 4; 575 *offset = pos; 576 } 577 578 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 579 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 580 if (!stream_endpoint) { 581 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 582 return; 583 } 584 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 585 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 586 return; 587 } 588 stream_endpoint->send_stream = 1; 589 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 590 } 591 592 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 593 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 594 if (!stream_endpoint) { 595 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 596 return 0; 597 } 598 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 599 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 600 return 0; 601 } 602 603 if (stream_endpoint->l2cap_media_cid == 0){ 604 log_error("A2DP source: no media connection for seid %d", local_seid); 605 return 0; 606 } 607 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 608 } 609 610 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){ 611 if (size < num_bytes_to_copy + 1){ 612 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 613 return; 614 } 615 616 int pos = *offset; 617 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 618 memcpy(media_packet + pos, storage, num_bytes_to_copy); 619 pos += num_bytes_to_copy; 620 *offset = pos; 621 } 622 623 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){ 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 } 638 639 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 640 int offset = 0; 641 642 l2cap_reserve_packet_buffer(); 643 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 644 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 645 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 646 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 647 stream_endpoint->sequence_number++; 648 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 649 return size; 650 } 651