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__ "avdtp_source.c" 40 41 42 #include <stdint.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <math.h> 48 49 #include "btstack.h" 50 #include "avdtp.h" 51 #include "avdtp_util.h" 52 #include "avdtp_source.h" 53 54 #include "btstack_ring_buffer.h" 55 56 static const char * default_avdtp_source_service_name = "BTstack AVDTP Source Service"; 57 static const char * default_avdtp_source_service_provider_name = "BTstack AVDTP Source Service Provider"; 58 59 static avdtp_context_t avdtp_source_context; 60 61 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 62 63 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){ 64 uint8_t* attribute; 65 de_create_sequence(service); 66 67 // 0x0000 "Service Record Handle" 68 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 69 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 70 71 // 0x0001 "Service Class ID List" 72 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 73 attribute = de_push_sequence(service); 74 { 75 de_add_number(attribute, DE_UUID, DE_SIZE_16, AUDIO_SOURCE_GROUP); 76 } 77 de_pop_sequence(service, attribute); 78 79 // 0x0004 "Protocol Descriptor List" 80 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 81 attribute = de_push_sequence(service); 82 { 83 uint8_t* l2cpProtocol = de_push_sequence(attribute); 84 { 85 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 86 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); 87 } 88 de_pop_sequence(attribute, l2cpProtocol); 89 90 uint8_t* avProtocol = de_push_sequence(attribute); 91 { 92 de_add_number(avProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVDTP); // avProtocol_service 93 de_add_number(avProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 94 } 95 de_pop_sequence(attribute, avProtocol); 96 } 97 de_pop_sequence(service, attribute); 98 99 // 0x0005 "Public Browse Group" 100 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 101 attribute = de_push_sequence(service); 102 { 103 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 104 } 105 de_pop_sequence(service, attribute); 106 107 // 0x0009 "Bluetooth Profile Descriptor List" 108 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 109 attribute = de_push_sequence(service); 110 { 111 uint8_t *a2dProfile = de_push_sequence(attribute); 112 { 113 de_add_number(a2dProfile, DE_UUID, DE_SIZE_16, ADVANCED_AUDIO_DISTRIBUTION); 114 de_add_number(a2dProfile, DE_UINT, DE_SIZE_16, 0x0103); 115 } 116 de_pop_sequence(attribute, a2dProfile); 117 } 118 de_pop_sequence(service, attribute); 119 120 121 // 0x0100 "Service Name" 122 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 123 if (service_name){ 124 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 125 } else { 126 de_add_data(service, DE_STRING, strlen(default_avdtp_source_service_name), (uint8_t *) default_avdtp_source_service_name); 127 } 128 129 // 0x0100 "Provider Name" 130 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 131 if (service_provider_name){ 132 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 133 } else { 134 de_add_data(service, DE_STRING, strlen(default_avdtp_source_service_provider_name), (uint8_t *) default_avdtp_source_service_provider_name); 135 } 136 137 // 0x0311 "Supported Features" 138 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 139 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 140 } 141 142 143 void avdtp_source_register_media_transport_category(uint8_t seid){ 144 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 145 avdtp_register_media_transport_category(stream_endpoint); 146 } 147 148 void avdtp_source_register_reporting_category(uint8_t seid){ 149 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 150 avdtp_register_reporting_category(stream_endpoint); 151 } 152 153 void avdtp_source_register_delay_reporting_category(uint8_t seid){ 154 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 155 avdtp_register_delay_reporting_category(stream_endpoint); 156 } 157 158 void avdtp_source_register_recovery_category(uint8_t seid, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 159 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 160 avdtp_register_recovery_category(stream_endpoint, maximum_recovery_window_size, maximum_number_media_packets); 161 } 162 163 void avdtp_source_register_content_protection_category(uint8_t seid, uint16_t cp_type, const uint8_t * cp_type_value, uint8_t cp_type_value_len){ 164 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 165 avdtp_register_content_protection_category(stream_endpoint, cp_type, cp_type_value, cp_type_value_len); 166 } 167 168 void avdtp_source_register_header_compression_category(uint8_t seid, uint8_t back_ch, uint8_t media, uint8_t recovery){ 169 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 170 avdtp_register_header_compression_category(stream_endpoint, back_ch, media, recovery); 171 } 172 173 void avdtp_source_register_media_codec_category(uint8_t seid, avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, const uint8_t * media_codec_info, uint16_t media_codec_info_len){ 174 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 175 avdtp_register_media_codec_category(stream_endpoint, media_type, media_codec_type, media_codec_info, media_codec_info_len); 176 } 177 178 void avdtp_source_register_multiplexing_category(uint8_t seid, uint8_t fragmentation){ 179 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, &avdtp_source_context); 180 avdtp_register_multiplexing_category(stream_endpoint, fragmentation); 181 } 182 183 avdtp_stream_endpoint_t * avdtp_source_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){ 184 return avdtp_create_stream_endpoint(sep_type, media_type, &avdtp_source_context); 185 } 186 187 void avdtp_source_register_packet_handler(btstack_packet_handler_t callback){ 188 if (callback == NULL){ 189 log_error("avdtp_source_register_packet_handler called with NULL callback"); 190 return; 191 } 192 avdtp_source_context.avdtp_callback = callback; 193 } 194 195 void avdtp_source_connect(bd_addr_t bd_addr){ 196 avdtp_connection_t * connection = avdtp_connection_for_bd_addr(bd_addr, &avdtp_source_context); 197 if (!connection){ 198 connection = avdtp_create_connection(bd_addr, &avdtp_source_context); 199 } 200 if (connection->state != AVDTP_SIGNALING_CONNECTION_IDLE) return; 201 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 202 l2cap_create_channel(packet_handler, connection->remote_addr, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, NULL); 203 } 204 205 void avdtp_source_disconnect(uint16_t con_handle){ 206 avdtp_disconnect(con_handle, &avdtp_source_context); 207 } 208 209 void avdtp_source_open_stream(uint16_t con_handle, uint8_t acp_seid){ 210 avdtp_open_stream(con_handle, acp_seid, &avdtp_source_context); 211 } 212 213 void avdtp_source_start_stream(uint16_t con_handle, uint8_t acp_seid){ 214 avdtp_start_stream(con_handle, acp_seid, &avdtp_source_context); 215 } 216 217 void avdtp_source_stop_stream(uint16_t con_handle, uint8_t acp_seid){ 218 avdtp_stop_stream(con_handle, acp_seid, &avdtp_source_context); 219 } 220 221 void avdtp_source_abort_stream(uint16_t con_handle, uint8_t acp_seid){ 222 avdtp_abort_stream(con_handle, acp_seid, &avdtp_source_context); 223 } 224 225 void avdtp_source_discover_stream_endpoints(uint16_t con_handle){ 226 avdtp_discover_stream_endpoints(con_handle, &avdtp_source_context); 227 } 228 229 void avdtp_source_get_capabilities(uint16_t con_handle, uint8_t acp_seid){ 230 avdtp_get_capabilities(con_handle, acp_seid, &avdtp_source_context); 231 } 232 233 void avdtp_source_get_all_capabilities(uint16_t con_handle, uint8_t acp_seid){ 234 avdtp_get_all_capabilities(con_handle, acp_seid, &avdtp_source_context); 235 } 236 237 void avdtp_source_get_configuration(uint16_t con_handle, uint8_t acp_seid){ 238 avdtp_get_configuration(con_handle, acp_seid, &avdtp_source_context); 239 } 240 241 void avdtp_source_set_configuration(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 242 avdtp_set_configuration(con_handle, int_seid, acp_seid, configured_services_bitmap, configuration, &avdtp_source_context); 243 } 244 245 void avdtp_source_reconfigure(uint16_t con_handle, uint8_t acp_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 246 avdtp_reconfigure(con_handle, acp_seid, configured_services_bitmap, configuration, &avdtp_source_context); 247 } 248 249 void avdtp_source_suspend(uint16_t con_handle, uint8_t acp_seid){ 250 avdtp_suspend(con_handle, acp_seid, &avdtp_source_context); 251 } 252 253 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 254 avdtp_packet_handler(packet_type, channel, packet, size, &avdtp_source_context); 255 } 256 257 void avdtp_source_init(void){ 258 avdtp_source_context.stream_endpoints = NULL; 259 avdtp_source_context.connections = NULL; 260 avdtp_source_context.stream_endpoints_id_counter = 0; 261 avdtp_source_context.packet_handler = packet_handler; 262 263 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 264 } 265 266 int avdtp_source_streaming_endpoint_ready(uint16_t con_handle){ 267 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(con_handle, &avdtp_source_context); 268 if (!stream_endpoint) { 269 printf("no stream_endpoint found for 0x%02x", con_handle); 270 return 0; 271 } 272 return (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING || stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING_W2_SEND); 273 } 274 275 void avdtp_source_request_can_send_now(uint16_t con_handle){ 276 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(con_handle, &avdtp_source_context); 277 if (!stream_endpoint) { 278 printf("no stream_endpoint found for 0x%02x", con_handle); 279 return; 280 } 281 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING_W2_SEND; 282 avdtp_request_can_send_now_self(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 283 } 284 285 286 static void avdtp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 287 if (size < 12){ 288 printf("small outgoing buffer\n"); 289 return; 290 } 291 292 uint8_t rtp_version = 2; 293 uint8_t padding = 0; 294 uint8_t extension = 0; 295 uint8_t csrc_count = 0; 296 uint8_t payload_type = 0x60; 297 // uint16_t sequence_number = stream_endpoint->sequence_number; 298 uint32_t timestamp = btstack_run_loop_get_time_ms(); 299 uint32_t ssrc = 0x11223344; 300 301 // rtp header (min size 12B) 302 int pos = 0; 303 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 304 305 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 306 media_packet[pos++] = (marker << 1) | payload_type; 307 big_endian_store_16(media_packet, pos, sequence_number); 308 pos += 2; 309 big_endian_store_32(media_packet, pos, timestamp); 310 pos += 4; 311 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 312 pos += 4; 313 *offset = pos; 314 } 315 316 static void avdtp_source_copy_media_payload(uint8_t * media_packet, int size, int * offset, btstack_ring_buffer_t * sbc_ring_buffer){ 317 if (size < 18){ 318 printf("small outgoing buffer\n"); 319 return; 320 } 321 int pos = *offset; 322 // media payload 323 // sbc_header (size 1B) 324 uint8_t sbc_header_index = pos; 325 pos++; 326 uint8_t fragmentation = 0; 327 uint8_t starting_packet = 0; // set to 1 for the first packet of a fragmented SBC frame 328 uint8_t last_packet = 0; // set to 1 for the last packet of a fragmented SBC frame 329 uint8_t num_frames = 0; 330 331 uint32_t total_sbc_bytes_read = 0; 332 uint8_t sbc_frame_size = 0; 333 // payload 334 uint16_t sbc_frame_bytes = btstack_sbc_encoder_sbc_buffer_length(); 335 336 while (size - 13 - total_sbc_bytes_read >= sbc_frame_bytes && btstack_ring_buffer_bytes_available(sbc_ring_buffer)){ 337 uint32_t number_of_bytes_read = 0; 338 btstack_ring_buffer_read(sbc_ring_buffer, &sbc_frame_size, 1, &number_of_bytes_read); 339 btstack_ring_buffer_read(sbc_ring_buffer, media_packet + pos, sbc_frame_size, &number_of_bytes_read); 340 pos += sbc_frame_size; 341 total_sbc_bytes_read += sbc_frame_size; 342 num_frames++; 343 // printf("send sbc frame: timestamp %d, seq. nr %d\n", timestamp, stream_endpoint->sequence_number); 344 } 345 media_packet[sbc_header_index] = (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 346 *offset = pos; 347 } 348 349 void avdtp_source_stream_send_media_payload(uint16_t l2cap_media_cid, btstack_ring_buffer_t * sbc_ring_buffer, uint8_t marker){ 350 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(l2cap_media_cid, &avdtp_source_context); 351 if (!stream_endpoint) { 352 printf("no stream_endpoint found for 0x%02x", l2cap_media_cid); 353 return; 354 } 355 356 int size = l2cap_get_remote_mtu_for_local_cid(l2cap_media_cid); 357 int offset = 0; 358 359 l2cap_reserve_packet_buffer(); 360 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 361 //int size = l2cap_get_remote_mtu_for_local_cid(l2cap_media_cid); 362 avdtp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 363 avdtp_source_copy_media_payload(media_packet, size, &offset, sbc_ring_buffer); 364 stream_endpoint->sequence_number++; 365 l2cap_send_prepared(l2cap_media_cid, offset); 366 } 367 368