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)); 269 270 271 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 272 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 273 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 274 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 275 276 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 277 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 278 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 279 280 app_state = A2DP_W2_SET_CONFIGURATION; 281 break; 282 } 283 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 284 log_info("received non SBC codec. not implemented"); 285 break; 286 287 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 288 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)); 289 break; 290 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 291 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 292 break; 293 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 294 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)); 295 break; 296 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 297 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 298 break; 299 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 300 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)); 301 break; 302 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 303 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)); 304 break; 305 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 306 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 307 break; 308 case AVDTP_SUBEVENT_SIGNALING_CAPABILITY_DONE: 309 break; 310 311 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 312 // forward packet: 313 packet[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 314 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, packet, size); 315 break; 316 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 317 // TODO check cid 318 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 319 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 320 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 321 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 322 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 323 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 324 sc.min_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 325 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 326 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 327 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 328 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 329 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 330 break; 331 } 332 333 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 334 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 335 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, 0); 336 break; 337 338 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 339 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 340 status = avdtp_subevent_streaming_connection_established_get_status(packet); 341 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 342 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 343 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 344 if (status != 0){ 345 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 346 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 347 break; 348 } 349 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 350 app_state = A2DP_STREAMING_OPENED; 351 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 352 break; 353 354 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 355 avdtp_sep_t sep; 356 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 357 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 358 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 359 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 360 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); 361 remote_seps[remote_seps_index++] = sep; 362 break; 363 } 364 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 365 app_state = A2DP_W2_GET_CAPABILITIES; 366 sc.active_remote_sep_index = 0; 367 break; 368 369 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 370 // TODO check cid 371 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 372 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 373 log_info("A2DP Accepted %d, state %d", signal_identifier, app_state); 374 375 switch (app_state){ 376 case A2DP_W2_GET_CAPABILITIES: 377 if (sc.active_remote_sep_index < remote_seps_index){ 378 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 379 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 380 } 381 break; 382 case A2DP_W2_SET_CONFIGURATION:{ 383 if (!sc.local_stream_endpoint) return; 384 log_info("A2DP initiate set configuration locally and wait for response ... "); 385 app_state = A2DP_IDLE; 386 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); 387 break; 388 } 389 case A2DP_W2_RECONFIGURE_WITH_SEID: 390 log_info("A2DP reconfigured"); 391 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 392 app_state = A2DP_STREAMING_OPENED; 393 break; 394 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 395 log_info("A2DP open stream "); 396 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 397 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 398 break; 399 } 400 case A2DP_STREAMING_OPENED: 401 if (!a2dp_source_context.a2dp_callback) return; 402 switch (signal_identifier){ 403 case AVDTP_SI_START: 404 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 405 break; 406 case AVDTP_SI_SUSPEND: 407 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 408 break; 409 case AVDTP_SI_ABORT: 410 case AVDTP_SI_CLOSE: 411 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 412 break; 413 default: 414 break; 415 } 416 break; 417 default: 418 app_state = A2DP_IDLE; 419 break; 420 } 421 422 break; 423 case AVDTP_SUBEVENT_SIGNALING_REJECT: 424 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 425 app_state = A2DP_IDLE; 426 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 427 break; 428 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 429 app_state = A2DP_IDLE; 430 uint8_t event[6]; 431 int pos = 0; 432 event[pos++] = HCI_EVENT_A2DP_META; 433 event[pos++] = sizeof(event) - 2; 434 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 435 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 436 pos += 2; 437 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 438 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 439 break; 440 } 441 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 442 app_state = A2DP_IDLE; 443 uint8_t event[6]; 444 int pos = 0; 445 event[pos++] = HCI_EVENT_A2DP_META; 446 event[pos++] = sizeof(event) - 2; 447 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 448 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 449 pos += 2; 450 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 451 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 452 break; 453 } 454 default: 455 app_state = A2DP_IDLE; 456 log_info("not implemented"); 457 break; 458 } 459 } 460 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 461 if (callback == NULL){ 462 log_error("a2dp_source_register_packet_handler called with NULL callback"); 463 return; 464 } 465 avdtp_source_register_packet_handler(&packet_handler); 466 a2dp_source_context.a2dp_callback = callback; 467 } 468 469 void a2dp_source_init(void){ 470 avdtp_source_init(&a2dp_source_context); 471 } 472 473 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 474 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 475 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 476 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 477 if (!local_stream_endpoint){ 478 return NULL; 479 } 480 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 481 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 482 codec_capabilities, codec_capabilities_len); 483 484 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 485 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 486 sc.local_stream_endpoint = local_stream_endpoint; 487 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 488 return local_stream_endpoint; 489 } 490 491 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 492 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 493 if (!sc.local_stream_endpoint){ 494 log_error(" no local_stream_endpoint for seid %d", loc_seid); 495 return AVDTP_SEID_DOES_NOT_EXIST; 496 } 497 memcpy(sc.remote_addr, remote_addr, 6); 498 return avdtp_source_connect(remote_addr, a2dp_cid); 499 } 500 501 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 502 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 503 } 504 505 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 506 // UNUSED(sampling_frequency); 507 508 log_info("a2dp_source_reconfigure_stream"); 509 510 memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 4); 511 512 // update sampling frequency 513 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 514 switch (sampling_frequency){ 515 case 48000: 516 config |= (AVDTP_SBC_48000 << 4); 517 break; 518 case 44100: 519 config |= (AVDTP_SBC_44100 << 4); 520 break; 521 case 32000: 522 config |= (AVDTP_SBC_32000 << 4); 523 break; 524 case 16000: 525 config |= (AVDTP_SBC_16000 << 4); 526 break; 527 default: 528 log_error("Unsupported sampling frequency %u", sampling_frequency); 529 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 530 } 531 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 532 533 avdtp_capabilities_t new_configuration; 534 new_configuration.media_codec.media_type = AVDTP_AUDIO; 535 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 536 new_configuration.media_codec.media_codec_information_len = 4; 537 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 538 539 // sttart reconfigure 540 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 541 return avdtp_source_reconfigure( 542 a2dp_cid, 543 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 544 sc.active_remote_sep->seid, 545 1 << AVDTP_MEDIA_CODEC, 546 new_configuration 547 ); 548 } 549 550 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 551 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 552 } 553 554 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 555 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 556 } 557 558 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 559 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 560 log_error("small outgoing buffer"); 561 return; 562 } 563 564 uint8_t rtp_version = 2; 565 uint8_t padding = 0; 566 uint8_t extension = 0; 567 uint8_t csrc_count = 0; 568 uint8_t payload_type = 0x60; 569 // uint16_t sequence_number = stream_endpoint->sequence_number; 570 uint32_t timestamp = btstack_run_loop_get_time_ms(); 571 uint32_t ssrc = 0x11223344; 572 573 // rtp header (min size 12B) 574 int pos = 0; 575 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 576 577 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 578 media_packet[pos++] = (marker << 1) | payload_type; 579 big_endian_store_16(media_packet, pos, sequence_number); 580 pos += 2; 581 big_endian_store_32(media_packet, pos, timestamp); 582 pos += 4; 583 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 584 pos += 4; 585 *offset = pos; 586 } 587 588 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 589 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 590 if (!stream_endpoint) { 591 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 592 return; 593 } 594 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 595 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 596 return; 597 } 598 stream_endpoint->send_stream = 1; 599 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 600 } 601 602 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 603 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 604 if (!stream_endpoint) { 605 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 606 return 0; 607 } 608 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 609 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 610 return 0; 611 } 612 613 if (stream_endpoint->l2cap_media_cid == 0){ 614 log_error("A2DP source: no media connection for seid %d", local_seid); 615 return 0; 616 } 617 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 618 } 619 620 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){ 621 if (size < num_bytes_to_copy + 1){ 622 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 623 return; 624 } 625 626 int pos = *offset; 627 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 628 memcpy(media_packet + pos, storage, num_bytes_to_copy); 629 pos += num_bytes_to_copy; 630 *offset = pos; 631 } 632 633 int a2dp_source_stream_send_media_payload(uint16_t a2dp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){ 634 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 635 if (!stream_endpoint) { 636 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 637 return 0; 638 } 639 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 640 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 641 return 0; 642 } 643 644 if (stream_endpoint->l2cap_media_cid == 0){ 645 log_error("A2DP source: no media connection for seid %d", local_seid); 646 return 0; 647 } 648 649 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 650 int offset = 0; 651 652 l2cap_reserve_packet_buffer(); 653 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 654 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 655 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 656 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 657 stream_endpoint->sequence_number++; 658 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 659 return size; 660 } 661