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