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 static avdtp_context_t * avdtp_source_context; 55 56 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 57 58 void avdtp_source_register_media_transport_category(uint8_t seid){ 59 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 60 avdtp_register_media_transport_category(stream_endpoint); 61 } 62 63 void avdtp_source_register_reporting_category(uint8_t seid){ 64 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 65 avdtp_register_reporting_category(stream_endpoint); 66 } 67 68 void avdtp_source_register_delay_reporting_category(uint8_t seid){ 69 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 70 avdtp_register_delay_reporting_category(stream_endpoint); 71 } 72 73 void avdtp_source_register_recovery_category(uint8_t seid, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 74 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 75 avdtp_register_recovery_category(stream_endpoint, maximum_recovery_window_size, maximum_number_media_packets); 76 } 77 78 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){ 79 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 80 avdtp_register_content_protection_category(stream_endpoint, cp_type, cp_type_value, cp_type_value_len); 81 } 82 83 void avdtp_source_register_header_compression_category(uint8_t seid, uint8_t back_ch, uint8_t media, uint8_t recovery){ 84 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 85 avdtp_register_header_compression_category(stream_endpoint, back_ch, media, recovery); 86 } 87 88 void avdtp_source_register_media_codec_category(uint8_t seid, avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, uint8_t * media_codec_info, uint16_t media_codec_info_len){ 89 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 90 avdtp_register_media_codec_category(stream_endpoint, media_type, media_codec_type, media_codec_info, media_codec_info_len); 91 } 92 93 void avdtp_source_register_multiplexing_category(uint8_t seid, uint8_t fragmentation){ 94 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(seid, avdtp_source_context); 95 avdtp_register_multiplexing_category(stream_endpoint, fragmentation); 96 } 97 98 avdtp_stream_endpoint_t * avdtp_source_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){ 99 return avdtp_create_stream_endpoint(sep_type, media_type, avdtp_source_context); 100 } 101 102 void avdtp_source_register_packet_handler(btstack_packet_handler_t callback){ 103 if (callback == NULL){ 104 log_error("avdtp_source_register_packet_handler called with NULL callback"); 105 return; 106 } 107 avdtp_source_context->avdtp_callback = callback; 108 } 109 110 void avdtp_source_connect(bd_addr_t bd_addr){ 111 avdtp_connection_t * connection = avdtp_connection_for_bd_addr(bd_addr, avdtp_source_context); 112 if (!connection){ 113 connection = avdtp_create_connection(bd_addr, avdtp_source_context); 114 } 115 if (connection->state != AVDTP_SIGNALING_CONNECTION_IDLE) return; 116 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 117 l2cap_create_channel(packet_handler, connection->remote_addr, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, NULL); 118 } 119 120 void avdtp_source_disconnect(uint16_t con_handle){ 121 avdtp_disconnect(con_handle, avdtp_source_context); 122 } 123 124 void avdtp_source_open_stream(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid){ 125 avdtp_open_stream(con_handle, int_seid, acp_seid, avdtp_source_context); 126 } 127 128 void avdtp_source_start_stream(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid){ 129 avdtp_start_stream(con_handle, int_seid, acp_seid, avdtp_source_context); 130 } 131 132 void avdtp_source_stop_stream(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid){ 133 avdtp_stop_stream(con_handle, int_seid, acp_seid, avdtp_source_context); 134 } 135 136 void avdtp_source_abort_stream(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid){ 137 avdtp_abort_stream(con_handle, int_seid, acp_seid, avdtp_source_context); 138 } 139 140 void avdtp_source_discover_stream_endpoints(uint16_t con_handle){ 141 avdtp_discover_stream_endpoints(con_handle, avdtp_source_context); 142 } 143 144 void avdtp_source_get_capabilities(uint16_t con_handle, uint8_t acp_seid){ 145 avdtp_get_capabilities(con_handle, acp_seid, avdtp_source_context); 146 } 147 148 void avdtp_source_get_all_capabilities(uint16_t con_handle, uint8_t acp_seid){ 149 avdtp_get_all_capabilities(con_handle, acp_seid, avdtp_source_context); 150 } 151 152 void avdtp_source_get_configuration(uint16_t con_handle, uint8_t acp_seid){ 153 avdtp_get_configuration(con_handle, acp_seid, avdtp_source_context); 154 } 155 156 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){ 157 avdtp_set_configuration(con_handle, int_seid, acp_seid, configured_services_bitmap, configuration, avdtp_source_context); 158 } 159 160 void avdtp_source_reconfigure(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 161 avdtp_reconfigure(con_handle, int_seid, acp_seid, configured_services_bitmap, configuration, avdtp_source_context); 162 } 163 164 void avdtp_source_suspend(uint16_t con_handle, uint8_t int_seid, uint8_t acp_seid){ 165 avdtp_suspend(con_handle, int_seid, acp_seid, avdtp_source_context); 166 } 167 168 static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 169 avdtp_packet_handler(packet_type, channel, packet, size, avdtp_source_context); 170 } 171 172 void avdtp_source_init(avdtp_context_t * avdtp_context){ 173 if (!avdtp_context){ 174 log_error("avdtp_source_context is NULL"); 175 return; 176 } 177 avdtp_source_context = avdtp_context; 178 avdtp_source_context->stream_endpoints = NULL; 179 avdtp_source_context->connections = NULL; 180 avdtp_source_context->stream_endpoints_id_counter = 0; 181 avdtp_source_context->packet_handler = packet_handler; 182 183 l2cap_register_service(&packet_handler, BLUETOOTH_PROTOCOL_AVDTP, 0xffff, LEVEL_0); 184 } 185 186 int avdtp_source_stream_endpoint_ready(avdtp_stream_endpoint_t * stream_endpoint){ 187 if (!stream_endpoint) { 188 printf("no stream_endpoint"); 189 return 0; 190 } 191 return (stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING || stream_endpoint->state == AVDTP_STREAM_ENDPOINT_STREAMING_W2_SEND); 192 } 193 194 void avdtp_source_stream_endpoint_request_can_send_now(avdtp_stream_endpoint_t * stream_endpoint){ 195 if (!stream_endpoint) { 196 printf("no stream_endpoint"); 197 return; 198 } 199 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_STREAMING_W2_SEND; 200 avdtp_request_can_send_now_self(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 201 } 202 203 204 static void avdtp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 205 if (size < 12){ 206 printf("small outgoing buffer\n"); 207 return; 208 } 209 210 uint8_t rtp_version = 2; 211 uint8_t padding = 0; 212 uint8_t extension = 0; 213 uint8_t csrc_count = 0; 214 uint8_t payload_type = 0x60; 215 // uint16_t sequence_number = stream_endpoint->sequence_number; 216 uint32_t timestamp = btstack_run_loop_get_time_ms(); 217 uint32_t ssrc = 0x11223344; 218 219 // rtp header (min size 12B) 220 int pos = 0; 221 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 222 223 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 224 media_packet[pos++] = (marker << 1) | payload_type; 225 big_endian_store_16(media_packet, pos, sequence_number); 226 pos += 2; 227 big_endian_store_32(media_packet, pos, timestamp); 228 pos += 4; 229 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 230 pos += 4; 231 *offset = pos; 232 } 233 234 static void avdtp_source_copy_media_payload(uint8_t * media_packet, int size, int * offset, btstack_ring_buffer_t * sbc_ring_buffer){ 235 if (size < 18){ 236 printf("small outgoing buffer\n"); 237 return; 238 } 239 int pos = *offset; 240 // media payload 241 // sbc_header (size 1B) 242 uint8_t sbc_header_index = pos; 243 pos++; 244 uint8_t fragmentation = 0; 245 uint8_t starting_packet = 0; // set to 1 for the first packet of a fragmented SBC frame 246 uint8_t last_packet = 0; // set to 1 for the last packet of a fragmented SBC frame 247 uint8_t num_frames = 0; 248 249 uint32_t total_sbc_bytes_read = 0; 250 uint8_t sbc_frame_size = 0; 251 // payload 252 uint16_t sbc_frame_bytes = btstack_sbc_encoder_sbc_buffer_length(); 253 254 while (size - 13 - total_sbc_bytes_read >= sbc_frame_bytes && btstack_ring_buffer_bytes_available(sbc_ring_buffer)){ 255 uint32_t number_of_bytes_read = 0; 256 btstack_ring_buffer_read(sbc_ring_buffer, &sbc_frame_size, 1, &number_of_bytes_read); 257 btstack_ring_buffer_read(sbc_ring_buffer, media_packet + pos, sbc_frame_size, &number_of_bytes_read); 258 pos += sbc_frame_size; 259 total_sbc_bytes_read += sbc_frame_size; 260 num_frames++; 261 // printf("send sbc frame: timestamp %d, seq. nr %d\n", timestamp, stream_endpoint->sequence_number); 262 } 263 media_packet[sbc_header_index] = (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 264 *offset = pos; 265 } 266 267 void avdtp_source_stream_send_media_payload(uint16_t l2cap_media_cid, btstack_ring_buffer_t * sbc_ring_buffer, uint8_t marker){ 268 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(l2cap_media_cid, avdtp_source_context); 269 if (!stream_endpoint) { 270 printf("no stream_endpoint found for 0x%02x", l2cap_media_cid); 271 return; 272 } 273 274 int size = l2cap_get_remote_mtu_for_local_cid(l2cap_media_cid); 275 int offset = 0; 276 277 l2cap_reserve_packet_buffer(); 278 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 279 //int size = l2cap_get_remote_mtu_for_local_cid(l2cap_media_cid); 280 avdtp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 281 avdtp_source_copy_media_payload(media_packet, size, &offset, sbc_ring_buffer); 282 stream_endpoint->sequence_number++; 283 l2cap_send_prepared(l2cap_media_cid, offset); 284 } 285 286 uint8_t avdtp_source_remote_seps_num(uint16_t avdtp_cid){ 287 return avdtp_remote_seps_num(avdtp_cid, avdtp_source_context); 288 } 289 290 avdtp_sep_t * avdtp_source_remote_sep(uint16_t avdtp_cid, uint8_t index){ 291 return avdtp_remote_sep(avdtp_cid, index, avdtp_source_context); 292 } 293