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 <string.h> 44 45 #include "bluetooth_psm.h" 46 #include "bluetooth_sdp.h" 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "l2cap.h" 50 51 #include "classic/avdtp.h" 52 #include "classic/avdtp_util.h" 53 #include "classic/avdtp_source.h" 54 55 #define AVDTP_MEDIA_PAYLOAD_HEADER_SIZE 12 56 57 void avdtp_source_register_media_transport_category(uint8_t seid){ 58 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 59 avdtp_register_media_transport_category(stream_endpoint); 60 } 61 62 void avdtp_source_register_reporting_category(uint8_t seid){ 63 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 64 avdtp_register_reporting_category(stream_endpoint); 65 } 66 67 void avdtp_source_register_delay_reporting_category(uint8_t seid){ 68 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 69 avdtp_register_delay_reporting_category(stream_endpoint); 70 } 71 72 void avdtp_source_register_recovery_category(uint8_t seid, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 73 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 74 avdtp_register_recovery_category(stream_endpoint, maximum_recovery_window_size, maximum_number_media_packets); 75 } 76 77 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){ 78 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 79 avdtp_register_content_protection_category(stream_endpoint, cp_type, cp_type_value, cp_type_value_len); 80 } 81 82 void avdtp_source_register_header_compression_category(uint8_t seid, uint8_t back_ch, uint8_t media, uint8_t recovery){ 83 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 84 avdtp_register_header_compression_category(stream_endpoint, back_ch, media, recovery); 85 } 86 87 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){ 88 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 89 avdtp_register_media_codec_category(stream_endpoint, media_type, media_codec_type, media_codec_info, media_codec_info_len); 90 } 91 92 void avdtp_source_register_multiplexing_category(uint8_t seid, uint8_t fragmentation){ 93 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(seid); 94 avdtp_register_multiplexing_category(stream_endpoint, fragmentation); 95 } 96 97 avdtp_stream_endpoint_t * avdtp_source_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){ 98 return avdtp_create_stream_endpoint(sep_type, media_type); 99 } 100 101 uint8_t avdtp_source_connect(bd_addr_t remote, uint16_t * avdtp_cid){ 102 return avdtp_connect(remote, AVDTP_ROLE_SOURCE, avdtp_cid); 103 } 104 105 uint8_t avdtp_source_disconnect(uint16_t avdtp_cid){ 106 return avdtp_disconnect(avdtp_cid); 107 } 108 109 uint8_t avdtp_source_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 110 return avdtp_open_stream(avdtp_cid, local_seid, remote_seid); 111 } 112 113 uint8_t avdtp_source_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 114 return avdtp_start_stream(avdtp_cid, local_seid); 115 } 116 117 uint8_t avdtp_source_stop_stream(uint16_t avdtp_cid, uint8_t local_seid){ 118 return avdtp_stop_stream(avdtp_cid, local_seid); 119 } 120 121 uint8_t avdtp_source_abort_stream(uint16_t avdtp_cid, uint8_t local_seid){ 122 return avdtp_abort_stream(avdtp_cid, local_seid); 123 } 124 125 uint8_t avdtp_source_suspend(uint16_t avdtp_cid, uint8_t local_seid){ 126 return avdtp_suspend_stream(avdtp_cid, local_seid); 127 } 128 129 uint8_t avdtp_source_discover_stream_endpoints(uint16_t avdtp_cid){ 130 return avdtp_discover_stream_endpoints(avdtp_cid); 131 } 132 133 uint8_t avdtp_source_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 134 return avdtp_get_capabilities(avdtp_cid, remote_seid); 135 } 136 137 uint8_t avdtp_source_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 138 return avdtp_get_all_capabilities(avdtp_cid, remote_seid); 139 } 140 141 uint8_t avdtp_source_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid){ 142 return avdtp_get_configuration(avdtp_cid, remote_seid); 143 } 144 145 uint8_t avdtp_source_set_configuration(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 146 return avdtp_set_configuration(avdtp_cid, local_seid, remote_seid, configured_services_bitmap, configuration); 147 } 148 149 uint8_t avdtp_source_reconfigure(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 150 return avdtp_reconfigure(avdtp_cid, local_seid, remote_seid, configured_services_bitmap, configuration); 151 } 152 153 void avdtp_source_register_packet_handler(btstack_packet_handler_t callback){ 154 btstack_assert(callback != NULL); 155 156 avdtp_register_source_packet_handler(callback); 157 } 158 159 void avdtp_source_init(void) { 160 avdtp_init(); 161 } 162 163 164 static void avdtp_source_setup_media_header(uint8_t * media_packet, int size, int *offset, uint8_t marker, uint16_t sequence_number){ 165 if (size < AVDTP_MEDIA_PAYLOAD_HEADER_SIZE){ 166 log_error("small outgoing buffer"); 167 return; 168 } 169 170 uint8_t rtp_version = 2; 171 uint8_t padding = 0; 172 uint8_t extension = 0; 173 uint8_t csrc_count = 0; 174 uint8_t payload_type = 0x60; 175 // uint16_t sequence_number = stream_endpoint->sequence_number; 176 uint32_t timestamp = btstack_run_loop_get_time_ms(); 177 uint32_t ssrc = 0x11223344; 178 179 // rtp header (min size 12B) 180 int pos = 0; 181 // int mtu = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 182 183 media_packet[pos++] = (rtp_version << 6) | (padding << 5) | (extension << 4) | csrc_count; 184 media_packet[pos++] = (marker << 1) | payload_type; 185 big_endian_store_16(media_packet, pos, sequence_number); 186 pos += 2; 187 big_endian_store_32(media_packet, pos, timestamp); 188 pos += 4; 189 big_endian_store_32(media_packet, pos, ssrc); // only used for multicast 190 pos += 4; 191 *offset = pos; 192 } 193 194 static void avdtp_source_copy_media_payload(uint8_t * media_packet, int size, int * offset, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames){ 195 if (size < (num_bytes_to_copy + 1)){ 196 log_error("small outgoing buffer: buffer size %u, but need %u", size, num_bytes_to_copy + 1); 197 return; 198 } 199 200 int pos = *offset; 201 media_packet[pos++] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 202 (void)memcpy(media_packet + pos, storage, num_bytes_to_copy); 203 pos += num_bytes_to_copy; 204 *offset = pos; 205 } 206 207 int avdtp_source_stream_send_media_payload(uint16_t avdtp_cid, uint8_t local_seid, uint8_t * storage, int num_bytes_to_copy, uint8_t num_frames, uint8_t marker){ 208 UNUSED(avdtp_cid); 209 210 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 211 if (!stream_endpoint) { 212 log_error("avdtp source: no stream_endpoint with seid %d", local_seid); 213 return 0; 214 } 215 216 if (stream_endpoint->l2cap_media_cid == 0){ 217 log_error("avdtp source: no media connection for seid %d", local_seid); 218 return 0; 219 } 220 221 int size = l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid); 222 int offset = 0; 223 224 l2cap_reserve_packet_buffer(); 225 uint8_t * media_packet = l2cap_get_outgoing_buffer(); 226 227 avdtp_source_setup_media_header(media_packet, size, &offset, marker, stream_endpoint->sequence_number); 228 avdtp_source_copy_media_payload(media_packet, size, &offset, storage, num_bytes_to_copy, num_frames); 229 stream_endpoint->sequence_number++; 230 l2cap_send_prepared(stream_endpoint->l2cap_media_cid, offset); 231 return size; 232 } 233 234 void avdtp_source_stream_endpoint_request_can_send_now(uint16_t avdtp_cid, uint8_t local_seid){ 235 UNUSED(avdtp_cid); 236 237 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 238 if (!stream_endpoint) { 239 log_error("AVDTP source: no stream_endpoint with seid %d", local_seid); 240 return; 241 } 242 stream_endpoint->send_stream = 1; 243 avdtp_request_can_send_now_initiator(stream_endpoint->connection, stream_endpoint->l2cap_media_cid); 244 } 245 246 int avdtp_max_media_payload_size(uint16_t avdtp_cid, uint8_t local_seid){ 247 UNUSED(avdtp_cid); 248 249 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 250 if (!stream_endpoint) { 251 log_error("A2DP source: no stream_endpoint with seid %d", local_seid); 252 return 0; 253 } 254 255 if (stream_endpoint->l2cap_media_cid == 0){ 256 log_error("A2DP source: no media connection for seid %d", local_seid); 257 return 0; 258 } 259 return l2cap_get_remote_mtu_for_local_cid(stream_endpoint->l2cap_media_cid) - AVDTP_MEDIA_PAYLOAD_HEADER_SIZE; 260 } 261