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 } 215 216 217 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 218 UNUSED(channel); 219 UNUSED(size); 220 221 uint8_t signal_identifier; 222 uint8_t status; 223 uint8_t local_seid; 224 uint8_t remote_seid; 225 uint16_t cid; 226 bd_addr_t address; 227 228 if (packet_type != HCI_EVENT_PACKET) return; 229 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVDTP_META) return; 230 231 switch (packet[2]){ 232 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:{ 233 avdtp_subevent_signaling_connection_established_get_bd_addr(packet, sc.remote_addr); 234 cid = avdtp_subevent_signaling_connection_established_get_avdtp_cid(packet); 235 status = avdtp_subevent_signaling_connection_established_get_status(packet); 236 237 if (status != 0){ 238 log_info("AVDTP_SUBEVENT_SIGNALING_CONNECTION failed status %d ---", status); 239 app_state = A2DP_IDLE; 240 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 241 break; 242 } 243 log_info("A2DP_SUBEVENT_SIGNALING_CONNECTION established avdtp_cid 0x%02x ---", a2dp_source_context.avdtp_cid); 244 sc.active_remote_sep = NULL; 245 sc.active_remote_sep_index = 0; 246 app_state = A2DP_W2_DISCOVER_SEPS; 247 remote_seps_index = 0; 248 memset(remote_seps, 0, sizeof(avdtp_sep_t) * AVDTP_MAX_SEP_NUM); 249 a2dp_signaling_emit_connection_established(a2dp_source_context.a2dp_callback, cid, sc.remote_addr, status); 250 avdtp_source_discover_stream_endpoints(cid); 251 break; 252 } 253 254 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CAPABILITY:{ 255 log_info("A2DP received SBC capability."); 256 if (!sc.local_stream_endpoint) { 257 log_error("invalid local seid %d", avdtp_subevent_signaling_media_codec_sbc_capability_get_local_seid(packet)); 258 return; 259 } 260 log_info("A2DP received SBC capability."); 261 262 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)); 263 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)); 264 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)); 265 uint8_t subbands = avdtp_choose_sbc_subbands(sc.local_stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 266 267 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)); 268 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)); 269 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)); 270 271 272 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[0] = (sampling_frequency << 4) | channel_mode; 273 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[1] = (block_length << 4) | (subbands << 2) | allocation_method; 274 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[2] = min_bitpool_value; 275 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_information[3] = max_bitpool_value; 276 277 sc.local_stream_endpoint->remote_configuration_bitmap = store_bit16(sc.local_stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 278 sc.local_stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 279 sc.local_stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 280 281 // printf(" - num_channels: %d\n", num_channels); 282 printf(" - sampling_frequency: %d\n", sampling_frequency); 283 printf(" - channel_mode: %d\n", channel_mode); 284 printf(" - block_length: %d\n", block_length); 285 printf(" - subbands: %d\n", subbands); 286 printf(" - allocation_method: %d\n", allocation_method); 287 printf(" - bitpool_value orig [%d, %d] \n", avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet), avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 288 printf(" - bitpool_value [%d, %d] \n", min_bitpool_value, max_bitpool_value); 289 printf("\n"); 290 291 app_state = A2DP_W2_SET_CONFIGURATION; 292 break; 293 } 294 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CAPABILITY: 295 log_info("received non SBC codec. not implemented"); 296 break; 297 298 case AVDTP_SUBEVENT_SIGNALING_MEDIA_TRANSPORT_CAPABILITY: 299 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)); 300 break; 301 case AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY: 302 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_REPORTING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_reporting_capability_get_remote_seid(packet)); 303 break; 304 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 305 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)); 306 break; 307 case AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY: 308 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_RECOVERY_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_recovery_capability_get_remote_seid(packet)); 309 break; 310 case AVDTP_SUBEVENT_SIGNALING_CONTENT_PROTECTION_CAPABILITY: 311 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)); 312 break; 313 case AVDTP_SUBEVENT_SIGNALING_HEADER_COMPRESSION_CAPABILITY: 314 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)); 315 break; 316 case AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY: 317 log_info("received, but not forwarded: AVDTP_SUBEVENT_SIGNALING_MULTIPLEXING_CAPABILITY, remote seid %d\n", avdtp_subevent_signaling_multiplexing_capability_get_remote_seid(packet)); 318 break; 319 case AVDTP_SUBEVENT_SIGNALING_CAPABILITY_DONE: 320 break; 321 322 case AVDTP_SUBEVENT_SIGNALING_DELAY_REPORT: 323 // forward packet: 324 packet[2] = A2DP_SUBEVENT_SIGNALING_DELAY_REPORT; 325 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, packet, size); 326 break; 327 case AVDTP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 328 // TODO check cid 329 sc.sampling_frequency = avdtp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 330 sc.block_length = avdtp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 331 sc.subbands = avdtp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 332 sc.allocation_method = avdtp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet) - 1; 333 sc.max_bitpool_value = avdtp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 334 sc.channel_mode = avdtp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 335 // TODO: deal with reconfigure: avdtp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 336 log_info("A2DP received SBC Config: sample rate %u, max bitpool %u.", sc.sampling_frequency, sc.max_bitpool_value); 337 app_state = A2DP_W2_OPEN_STREAM_WITH_SEID; 338 a2dp_signaling_emit_media_codec_sbc(a2dp_source_context.a2dp_callback, packet, size); 339 break; 340 } 341 342 case AVDTP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 343 cid = avdtp_subevent_streaming_can_send_media_packet_now_get_avdtp_cid(packet); 344 a2dp_streaming_emit_can_send_media_packet_now(a2dp_source_context.a2dp_callback, cid, 0); 345 break; 346 347 case AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED: 348 avdtp_subevent_streaming_connection_established_get_bd_addr(packet, address); 349 status = avdtp_subevent_streaming_connection_established_get_status(packet); 350 cid = avdtp_subevent_streaming_connection_established_get_avdtp_cid(packet); 351 remote_seid = avdtp_subevent_streaming_connection_established_get_remote_seid(packet); 352 local_seid = avdtp_subevent_streaming_connection_established_get_local_seid(packet); 353 if (status != 0){ 354 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION could not be established, avdtp_cid 0x%02x, status 0x%02x ---", cid, status); 355 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, status); 356 break; 357 } 358 log_info("AVDTP_SUBEVENT_STREAMING_CONNECTION_ESTABLISHED --- avdtp_cid 0x%02x, local seid %d, remote seid %d", cid, local_seid, remote_seid); 359 app_state = A2DP_STREAMING_OPENED; 360 a2dp_streaming_emit_connection_established(a2dp_source_context.a2dp_callback, cid, address, local_seid, remote_seid, 0); 361 break; 362 363 case AVDTP_SUBEVENT_SIGNALING_SEP_FOUND:{ 364 avdtp_sep_t sep; 365 sep.seid = avdtp_subevent_signaling_sep_found_get_remote_seid(packet);; 366 sep.in_use = avdtp_subevent_signaling_sep_found_get_in_use(packet); 367 sep.media_type = (avdtp_media_type_t) avdtp_subevent_signaling_sep_found_get_media_type(packet); 368 sep.type = (avdtp_sep_type_t) avdtp_subevent_signaling_sep_found_get_sep_type(packet); 369 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); 370 remote_seps[remote_seps_index++] = sep; 371 break; 372 } 373 case AVDTP_SUBEVENT_SIGNALING_SEP_DICOVERY_DONE: 374 app_state = A2DP_W2_GET_CAPABILITIES; 375 sc.active_remote_sep_index = 0; 376 break; 377 378 case AVDTP_SUBEVENT_SIGNALING_ACCEPT: 379 // TODO check cid 380 signal_identifier = avdtp_subevent_signaling_accept_get_signal_identifier(packet); 381 cid = avdtp_subevent_signaling_accept_get_avdtp_cid(packet); 382 log_info("A2DP Accepted %d, state %d", signal_identifier, app_state); 383 384 switch (app_state){ 385 case A2DP_W2_GET_CAPABILITIES: 386 if (sc.active_remote_sep_index < remote_seps_index){ 387 sc.active_remote_sep = &remote_seps[sc.active_remote_sep_index++]; 388 avdtp_source_get_capabilities(cid, sc.active_remote_sep->seid); 389 } 390 break; 391 case A2DP_W2_SET_CONFIGURATION:{ 392 if (!sc.local_stream_endpoint) return; 393 log_info("A2DP initiate set configuration locally and wait for response ... "); 394 app_state = A2DP_IDLE; 395 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); 396 break; 397 } 398 case A2DP_W2_RECONFIGURE_WITH_SEID: 399 log_info("A2DP reconfigured"); 400 a2dp_signaling_emit_reconfigured(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 0); 401 app_state = A2DP_STREAMING_OPENED; 402 break; 403 case A2DP_W2_OPEN_STREAM_WITH_SEID:{ 404 log_info("A2DP open stream "); 405 app_state = A2DP_W4_OPEN_STREAM_WITH_SEID; 406 avdtp_source_open_stream(cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), sc.active_remote_sep->seid); 407 break; 408 } 409 case A2DP_STREAMING_OPENED: 410 if (!a2dp_source_context.a2dp_callback) return; 411 switch (signal_identifier){ 412 case AVDTP_SI_START: 413 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STARTED); 414 break; 415 case AVDTP_SI_SUSPEND: 416 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_SUSPENDED); 417 break; 418 case AVDTP_SI_ABORT: 419 case AVDTP_SI_CLOSE: 420 a2dp_signaling_emit_control_command(a2dp_source_context.a2dp_callback, cid, avdtp_stream_endpoint_seid(sc.local_stream_endpoint), A2DP_SUBEVENT_STREAM_STOPPED); 421 break; 422 default: 423 break; 424 } 425 break; 426 default: 427 app_state = A2DP_IDLE; 428 break; 429 } 430 431 break; 432 case AVDTP_SUBEVENT_SIGNALING_REJECT: 433 case AVDTP_SUBEVENT_SIGNALING_GENERAL_REJECT: 434 app_state = A2DP_IDLE; 435 a2dp_signaling_emit_reject_cmd(a2dp_source_context.a2dp_callback, packet, size); 436 break; 437 case AVDTP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:{ 438 app_state = A2DP_IDLE; 439 uint8_t event[6]; 440 int pos = 0; 441 event[pos++] = HCI_EVENT_A2DP_META; 442 event[pos++] = sizeof(event) - 2; 443 event[pos++] = A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED; 444 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 445 pos += 2; 446 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 447 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 448 break; 449 } 450 case AVDTP_SUBEVENT_STREAMING_CONNECTION_RELEASED:{ 451 app_state = A2DP_IDLE; 452 uint8_t event[6]; 453 int pos = 0; 454 event[pos++] = HCI_EVENT_A2DP_META; 455 event[pos++] = sizeof(event) - 2; 456 event[pos++] = A2DP_SUBEVENT_STREAM_RELEASED; 457 little_endian_store_16(event, pos, avdtp_subevent_streaming_connection_released_get_avdtp_cid(packet)); 458 pos += 2; 459 event[pos++] = avdtp_subevent_streaming_connection_released_get_local_seid(packet); 460 (*a2dp_source_context.a2dp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 461 break; 462 } 463 default: 464 app_state = A2DP_IDLE; 465 log_info("not implemented"); 466 break; 467 } 468 } 469 void a2dp_source_register_packet_handler(btstack_packet_handler_t callback){ 470 if (callback == NULL){ 471 log_error("a2dp_source_register_packet_handler called with NULL callback"); 472 return; 473 } 474 avdtp_source_register_packet_handler(&packet_handler); 475 a2dp_source_context.a2dp_callback = callback; 476 } 477 478 void a2dp_source_init(void){ 479 avdtp_source_init(&a2dp_source_context); 480 } 481 482 avdtp_stream_endpoint_t * a2dp_source_create_stream_endpoint(avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, 483 uint8_t * codec_capabilities, uint16_t codec_capabilities_len, 484 uint8_t * media_codec_info, uint16_t media_codec_info_len){ 485 avdtp_stream_endpoint_t * local_stream_endpoint = avdtp_source_create_stream_endpoint(AVDTP_SOURCE, media_type); 486 if (!local_stream_endpoint){ 487 return NULL; 488 } 489 avdtp_source_register_media_transport_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 490 avdtp_source_register_media_codec_category(avdtp_stream_endpoint_seid(local_stream_endpoint), media_type, media_codec_type, 491 codec_capabilities, codec_capabilities_len); 492 493 local_stream_endpoint->remote_configuration.media_codec.media_codec_information = media_codec_info; 494 local_stream_endpoint->remote_configuration.media_codec.media_codec_information_len = media_codec_info_len; 495 sc.local_stream_endpoint = local_stream_endpoint; 496 avdtp_source_register_delay_reporting_category(avdtp_stream_endpoint_seid(local_stream_endpoint)); 497 return local_stream_endpoint; 498 } 499 500 uint8_t a2dp_source_establish_stream(bd_addr_t remote_addr, uint8_t loc_seid, uint16_t * a2dp_cid){ 501 sc.local_stream_endpoint = avdtp_stream_endpoint_for_seid(loc_seid, &a2dp_source_context); 502 if (!sc.local_stream_endpoint){ 503 log_error(" no local_stream_endpoint for seid %d", loc_seid); 504 return AVDTP_SEID_DOES_NOT_EXIST; 505 } 506 memcpy(sc.remote_addr, remote_addr, 6); 507 return avdtp_source_connect(remote_addr, a2dp_cid); 508 } 509 510 uint8_t a2dp_source_disconnect(uint16_t a2dp_cid){ 511 return avdtp_disconnect(a2dp_cid, &a2dp_source_context); 512 } 513 514 uint8_t a2dp_source_reconfigure_stream_sampling_frequency(uint16_t a2dp_cid, uint32_t sampling_frequency){ 515 // UNUSED(sampling_frequency); 516 517 log_info("a2dp_source_reconfigure_stream"); 518 519 memcpy(sc.local_stream_endpoint->reconfigure_media_codec_sbc_info, sc.local_stream_endpoint->remote_sep.configuration.media_codec.media_codec_information, 4); 520 521 // update sampling frequency 522 uint8_t config = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] & 0x0f; 523 switch (sampling_frequency){ 524 case 48000: 525 config |= (AVDTP_SBC_48000 << 4); 526 break; 527 case 44100: 528 config |= (AVDTP_SBC_44100 << 4); 529 break; 530 case 32000: 531 config |= (AVDTP_SBC_32000 << 4); 532 break; 533 case 16000: 534 config |= (AVDTP_SBC_16000 << 4); 535 break; 536 default: 537 log_error("Unsupported sampling frequency %u", sampling_frequency); 538 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 539 } 540 sc.local_stream_endpoint->reconfigure_media_codec_sbc_info[0] = config; 541 542 avdtp_capabilities_t new_configuration; 543 new_configuration.media_codec.media_type = AVDTP_AUDIO; 544 new_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 545 new_configuration.media_codec.media_codec_information_len = 4; 546 new_configuration.media_codec.media_codec_information = sc.local_stream_endpoint->reconfigure_media_codec_sbc_info; 547 548 // sttart reconfigure 549 app_state = A2DP_W2_RECONFIGURE_WITH_SEID; 550 return avdtp_source_reconfigure( 551 a2dp_cid, 552 avdtp_stream_endpoint_seid(sc.local_stream_endpoint), 553 sc.active_remote_sep->seid, 554 1 << AVDTP_MEDIA_CODEC, 555 new_configuration 556 ); 557 } 558 559 uint8_t a2dp_source_start_stream(uint16_t a2dp_cid, uint8_t local_seid){ 560 return avdtp_start_stream(a2dp_cid, local_seid, &a2dp_source_context); 561 } 562 563 uint8_t a2dp_source_pause_stream(uint16_t a2dp_cid, uint8_t local_seid){ 564 return avdtp_suspend_stream(a2dp_cid, local_seid, &a2dp_source_context); 565 } 566 567 static void a2dp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 568 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 569 log_error("small outgoing buffer"); 570 return; 571 } 572 573 uint8_t rtp_version = 2; 574 uint8_t padding = 0; 575 uint8_t extension = 0; 576 uint8_t csrc_count = 0; 577 uint8_t payload_type = 0x60; 578 // uint16_t sequence_number = stream_endpoint->sequence_number; 579 uint32_t timestamp = btstack_run_loop_get_time_ms(); 580 uint32_t ssrc = 0x11223344; 581 582 // rtp header (min size 12B) 583 int pos = 0; 584 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 585 586 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 587 media_packet[pos++] = (marker << 1) | payload_type; 588 big_endian_store_16(media_packet, pos, sequence_number); 589 pos += 2; 590 big_endian_store_32(media_packet, pos, timestamp); 591 pos += 4; 592 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 593 pos += 4; 594 *offset = pos; 595 } 596 597 void a2dp_source_stream_endpoint_request_can_send_now(uint16_t a2dp_cid, uint8_t local_seid){ 598 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 599 if (!stream_endpoint) { 600 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 601 return; 602 } 603 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 604 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 605 return; 606 } 607 stream_endpoint->send_stream = 1; 608 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 609 } 610 611 int a2dp_max_media_payload_size(uint16_t a2dp_cid, uint8_t local_seid){ 612 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 613 if (!stream_endpoint) { 614 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 615 return 0; 616 } 617 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 618 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 619 return 0; 620 } 621 622 if (stream_endpoint->l2cap_media_cid == 0){ 623 log_error("A2DP source: no media connection for seid %d", local_seid); 624 return 0; 625 } 626 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 627 } 628 629 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){ 630 if (size < num_bytes_to_copy + 1){ 631 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 632 return; 633 } 634 635 int pos = *offset; 636 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 637 memcpy(media_packet + pos, storage, num_bytes_to_copy); 638 pos += num_bytes_to_copy; 639 *offset = pos; 640 } 641 642 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){ 643 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, &a2dp_source_context); 644 if (!stream_endpoint) { 645 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 646 return 0; 647 } 648 if (a2dp_source_context.avdtp_cid != a2dp_cid){ 649 log_error("A2DP source: a2dp cid 0x%02x not known, expected 0x%02x", a2dp_cid, a2dp_source_context.avdtp_cid); 650 return 0; 651 } 652 653 if (stream_endpoint->l2cap_media_cid == 0){ 654 log_error("A2DP source: no media connection for seid %d", local_seid); 655 return 0; 656 } 657 658 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 659 int offset = 0; 660 661 l2cap_reserve_packet_buffer(); 662 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 663 //int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 664 a2dp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 665 a2dp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 666 stream_endpoint->sequence_number++; 667 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 668 return size; 669 } 670