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 #include <unistd.h> 46 47 #include "btstack.h" 48 #include "avdtp.h" 49 #include "avdtp_util.h" 50 #include "avdtp_source.h" 51 #include "a2dp_source.h" 52 #include "sbc_encoder.h" 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 typedef struct { 59 // to app 60 uint32_t fill_audio_ring_buffer_timeout_ms; 61 uint32_t time_audio_data_sent; // ms 62 uint32_t acc_num_missed_samples; 63 uint32_t samples_ready; 64 btstack_timer_source_t fill_audio_ring_buffer_timer; 65 btstack_ring_buffer_t sbc_ring_buffer; 66 btstack_sbc_encoder_state_t sbc_encoder_state; 67 68 int reconfigure; 69 int num_channels; 70 int sampling_frequency; 71 int channel_mode; 72 int block_length; 73 int subbands; 74 int allocation_method; 75 int min_bitpool_value; 76 int max_bitpool_value; 77 avdtp_stream_endpoint_t * local_stream_endpoint; 78 avdtp_sep_t * active_remote_sep; 79 } avdtp_stream_endpoint_context_t; 80 81 static a2dp_state_t app_state = A2DP_IDLE; 82 static avdtp_stream_endpoint_context_t sc; 83 static uint16_t avdtp_cid = 0; 84 static int next_remote_sep_index_to_query = 0; 85 86 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 87 88 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){ 89 uint8_t* attribute; 90 de_create_sequence(service); 91 92 // 0x0000 "Service Record Handle" 93 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 94 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 95 96 // 0x0001 "Service Class ID List" 97 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 98 attribute = de_push_sequence(service); 99 { 100 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE); 101 } 102 de_pop_sequence(service, attribute); 103 104 // 0x0004 "Protocol Descriptor List" 105 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 106 attribute = de_push_sequence(service); 107 { 108 uint8_t* l2cpProtocol = de_push_sequence(attribute); 109 { 110 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 111 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 112 } 113 de_pop_sequence(attribute, l2cpProtocol); 114 115 uint8_t* avProtocol = de_push_sequence(attribute); 116 { 117 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 118 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 119 } 120 de_pop_sequence(attribute, avProtocol); 121 } 122 de_pop_sequence(service, attribute); 123 124 // 0x0005 "Public Browse Group" 125 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 126 attribute = de_push_sequence(service); 127 { 128 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 129 } 130 de_pop_sequence(service, attribute); 131 132 // 0x0009 "Bluetooth Profile Descriptor List" 133 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 134 attribute = de_push_sequence(service); 135 { 136 uint8_t *a2dProfile = de_push_sequence(attribute); 137 { 138 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_ADVANCED_AUDIO_DISTRIBUTION); 139 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 140 } 141 de_pop_sequence(attribute, a2dProfile); 142 } 143 de_pop_sequence(service, attribute); 144 145 146 // 0x0100 "Service Name" 147 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 148 if (service_name){ 149 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 150 } else { 151 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_name), (uint8_t *) default_a2dp_source_service_name); 152 } 153 154 // 0x0100 "Provider Name" 155 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 156 if (service_provider_name){ 157 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 158 } else { 159 de_add_data(service, DE_STRING, strlen(default_a2dp_source_service_provider_name), (uint8_t *) default_a2dp_source_service_provider_name); 160 } 161 162 // 0x0311 "Supported Features" 163 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 164 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 165 } 166 167 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 168 UNUSED(channel); 169 UNUSED(size); 170 171 bd_addr_t event_addr; 172 uint8_t signal_identifier; 173 uint8_t status; 174 avdtp_sep_t sep; 175 uint8_t int_seid; 176 uint8_t acp_seid; 177 178 switch (packet_type) { 179 180 case HCI_EVENT_PACKET: 181 switch (hci_event_packet_get_type(packet)) { 182 case HCI_EVENT_PIN_CODE_REQUEST: 183 // inform about pin code request 184 printf("Pin code request - using '0000'\n"); 185 hci_event_pin_code_request_get_bd_addr(packet, event_addr); 186 hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000"); 187 break; 188 case HCI_EVENT_DISCONNECTION_COMPLETE: 189 // connection closed -> quit test app 190 printf("\n --- a2dp source --- HCI_EVENT_DISCONNECTION_COMPLETE ---\n"); 191 break; 192 case HCI_EVENT_AVDTP_META: 193 switch (packet[2]){ 194 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 195 avdtp_cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 196 status = avdtp_subevent_signaling_connection_established_get_status(packet); 197 if (status != 0){ 198 printf(" --- a2dp source --- AVDTP_SUBEVENT_SIGNALING_CONNECTION could not be established, status %d ---\n", status); 199 break; 200 } 201 sc.active_remote_sep = NULL; 202 next_remote_sep_index_to_query = 0; 203 app_state = A2DP_W2_DISCOVER_SEPS; 204 printf(" --- a2dp source --- AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED, avdtp cid 0x%02x ---\n", avdtp_cid); 205 avdtp_source_discover_stream_endpoints(avdtp_cid); 206 break; 207 208 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 209 status = avdtp_subevent_streaming_connection_established_get_status(packet); 210 avdtp_cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 211 int_seid = avdtp_subevent_streaming_connection_established_get_int_seid(packet); 212 acp_seid = avdtp_subevent_streaming_connection_established_get_acp_seid(packet); 213 214 if (status != 0){ 215 printf(" --- a2dp source --- AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, status %d ---\n", status); 216 break; 217 } 218 app_state = A2DP_STREAMING_OPENED; 219 avdtp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, avdtp_cid, int_seid, acp_seid, 0); 220 printf(" --- a2dp source --- AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d\n", avdtp_cid, int_seid, acp_seid); 221 break; 222 223 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND: 224 if (app_state != A2DP_W2_DISCOVER_SEPS) return; 225 sep.seid = avdtp_subevent_signaling_sep_found_get_seid(packet); 226 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 227 sep.media_type = avdtp_subevent_signaling_sep_found_get_media_type(packet); 228 sep.type = avdtp_subevent_signaling_sep_found_get_sep_type(packet); 229 printf(" --- a2dp source --- Found sep: seid %u, in_use %d, media type %d, sep type %d (1-SNK)\n", sep.seid, sep.in_use, sep.media_type, sep.type); 230 break; 231 232 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 233 printf(" AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY 0\n"); 234 if (!sc.local_stream_endpoint) return; 235 printf(" AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY 1\n"); 236 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)); 237 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)); 238 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)); 239 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 240 241 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)); 242 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)); 243 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)); 244 245 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 246 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 247 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 248 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 249 250 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 251 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 252 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 253 254 app_state = A2DP_W2_SET_CONFIGURATION; 255 break; 256 } 257 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 258 printf(" --- a2dp source --- received non SBC codec. not implemented\n"); 259 break; 260 261 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 262 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 263 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 264 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 265 switch (avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet)){ 266 case AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS: 267 sc.allocation_method = SBC_LOUDNESS; 268 break; 269 case AVDTP_SBC_ALLOCATION_METHOD_SNR: 270 sc.allocation_method = SBC_SNR; 271 break; 272 } 273 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 274 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 275 break; 276 } 277 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 278 avdtp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, avdtp_cid, 0, 0); 279 break; 280 281 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 282 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 283 status = avdtp_subevent_signaling_accept_get_status(packet); 284 printf(" --- a2dp source --- Accepted %d\n", signal_identifier); 285 286 switch (app_state){ 287 case A2DP_W2_DISCOVER_SEPS: 288 app_state = A2DP_W2_GET_ALL_CAPABILITIES; 289 sc.active_remote_sep = avdtp_source_remote_sep(avdtp_cid, next_remote_sep_index_to_query++); 290 printf(" --- a2dp source --- Query get caps for seid %d\n", sc.active_remote_sep->seid); 291 avdtp_source_get_capabilities(avdtp_cid, sc.active_remote_sep->seid); 292 break; 293 case A2DP_W2_GET_CAPABILITIES: 294 case A2DP_W2_GET_ALL_CAPABILITIES: 295 if (next_remote_sep_index_to_query < avdtp_source_remote_seps_num(avdtp_cid)){ 296 sc.active_remote_sep = avdtp_source_remote_sep(avdtp_cid, next_remote_sep_index_to_query++); 297 printf(" --- a2dp source --- Query get caps for seid %d\n", sc.active_remote_sep->seid); 298 avdtp_source_get_capabilities(avdtp_cid, sc.active_remote_sep->seid); 299 } else { 300 printf(" --- a2dp source --- No more remote seps found\n"); 301 app_state = A2DP_IDLE; 302 } 303 break; 304 case A2DP_W2_SET_CONFIGURATION:{ 305 if (!sc.local_stream_endpoint) return; 306 app_state = A2DP_W2_GET_CONFIGURATION; 307 avdtp_source_set_configuration(avdtp_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); 308 break; 309 } 310 case A2DP_W2_GET_CONFIGURATION: 311 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 312 avdtp_source_get_configuration(avdtp_cid, sc.active_remote_sep->seid); 313 break; 314 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 315 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 316 btstack_sbc_encoder_init(&sc.sbc_encoder_state, SBC_MODE_STANDARD, 317 sc.block_length, sc.subbands, 318 sc.allocation_method, sc.sampling_frequency, 319 sc.max_bitpool_value); 320 avdtp_source_open_stream(avdtp_cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 321 break; 322 } 323 case A2DP_STREAMING_OPENED: 324 if (!a2dp_source_context.a2dp_callback) return; 325 switch (signal_identifier){ 326 case AVDTP_SI_START:{ 327 uint8_t event[6]; 328 int pos = 0; 329 event[pos++] = HCI_EVENT_AVDTP_META; 330 event[pos++] = sizeof(event) - 2; 331 event[pos++] = AVDTP_SUBEVENT_START_STREAMING; 332 little_endian_store_16(event, pos, avdtp_cid); 333 pos += 2; 334 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 335 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 336 break; 337 } 338 case AVDTP_SI_CLOSE: 339 case AVDTP_SI_SUSPEND: 340 case AVDTP_SI_ABORT:{ 341 uint8_t event[6]; 342 int pos = 0; 343 event[pos++] = HCI_EVENT_AVDTP_META; 344 event[pos++] = sizeof(event) - 2; 345 event[pos++] = AVDTP_SUBEVENT_STOP_STREAMING; 346 little_endian_store_16(event, pos, avdtp_cid); 347 pos += 2; 348 event[pos++] = avdtp_stream_endpoint_seid(sc.local_stream_endpoint); 349 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 350 break; 351 } 352 default: 353 break; 354 } 355 break; 356 default: 357 app_state = A2DP_IDLE; 358 break; 359 } 360 361 break; 362 case AVDTP_SUBEVENT_SIGNALING_REJECT: 363 app_state = A2DP_IDLE; 364 signal_identifier = avdtp_subevent_signaling_reject_get_signal_identifier(packet); 365 printf(" --- a2dp source --- Rejected %d\n", signal_identifier); 366 break; 367 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 368 app_state = A2DP_IDLE; 369 signal_identifier = avdtp_subevent_signaling_general_reject_get_signal_identifier(packet); 370 printf(" --- a2dp source --- Rejected %d\n", signal_identifier); 371 break; 372 default: 373 app_state = A2DP_IDLE; 374 printf(" --- a2dp source --- not implemented\n"); 375 break; 376 } 377 break; 378 default: 379 break; 380 } 381 break; 382 default: 383 // other packet type 384 break; 385 } 386 } 387 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 388 if (callback == NULL){ 389 log_error("a2dp_source_register_packet_handler called with NULL callback"); 390 return; 391 } 392 avdtp_source_register_packet_handler(&packet_handler); 393 a2dp_source_context.a2dp_callback = callback; 394 } 395 396 void a2dp_source_init(void){ 397 avdtp_source_init(&a2dp_source_context); 398 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 399 } 400 401 uint8_t a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 402 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 403 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 404 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 405 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 406 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 407 codec_capabilities, codec_capabilities_len); 408 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 409 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 410 411 return local_stream_endpoint->sep.seid; 412 } 413 414 void a2dp_source_connect(bd_addr_t bd_addr, uint8_t local_seid){ 415 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 416 if (!sc.local_stream_endpoint){ 417 printf(" no local_stream_endpoint for seid %d\n", local_seid); 418 } 419 avdtp_source_connect(bd_addr); 420 421 } 422 423 void a2dp_source_disconnect(uint16_t con_handle){ 424 avdtp_disconnect(con_handle, &a2dp_source_context); 425 } 426 427 void a2dp_source_start_stream(uint16_t cid, uint8_t int_seid, uint8_t acp_seid){ 428 avdtp_start_stream(cid, int_seid, acp_seid, &a2dp_source_context); 429 } 430 431 void a2dp_source_stop_stream(uint16_t cid, uint8_t int_seid, uint8_t acp_seid){ 432 avdtp_stop_stream(cid, int_seid, acp_seid, &a2dp_source_context); 433 } 434 435