Mike Brady
60143518c2
- 48,000 frames per second operation, - 48k lossless stereo, 5.1 and 7.1 surround sound - Multichannel and multi rate operation on ALSA, PipeWire, PulseAudio, FreeBSD, stdout and unix pipe output backends. Automatic, flexible and controllable output format (rate, sample format and channel count) selection. Full FFmpeg integration to support transcoding, resampling, and new audio formats. Better operation on lower powered devices down to e.g. Raspberry Pi B. Reduced Docker image sizes with a slimmed-down FFmpeg library. Enhanced timestamp handling for better synchronization. Improved the sync error calculation. A new "vernier" resampling and interpolation method for low-power CPUs. Bug fixes and minor enhancements. Note -- there are many breaking changes from previous versions of Shairport Sync!
102 lines
3.3 KiB
C
102 lines
3.3 KiB
C
/*
|
|
* Embedded dns-sd client. This file is part of Shairport.
|
|
* Copyright (c) Paul Lietar 2013
|
|
* Copyright (c) Mike Brady 2014--2025
|
|
* All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use,
|
|
* copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include "mdns.h"
|
|
#include <arpa/inet.h>
|
|
#include <dns_sd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
static DNSServiceRef service;
|
|
|
|
static int mdns_dns_sd_register(char *ap1name, __attribute__((unused)) char *ap2name, int port,
|
|
__attribute__((unused)) char **txt_records,
|
|
__attribute__((unused)) char **secondary_txt_records) {
|
|
char *recordwithoutmetadata[] = {MDNS_RECORD_WITHOUT_METADATA, NULL};
|
|
#ifdef CONFIG_METADATA
|
|
char *recordwithmetadata[] = {MDNS_RECORD_WITH_METADATA, NULL};
|
|
#endif
|
|
char **record;
|
|
#ifdef CONFIG_METADATA
|
|
if (config.metadata_enabled)
|
|
record = recordwithmetadata;
|
|
else
|
|
#endif
|
|
record = recordwithoutmetadata;
|
|
|
|
uint16_t length = 0;
|
|
char **field;
|
|
|
|
// Concatenate string contained i record into buf.
|
|
|
|
for (field = record; *field; field++) {
|
|
length += strlen(*field) + 1; // One byte for length each time
|
|
}
|
|
|
|
char *buf = malloc(length * sizeof(char));
|
|
if (buf == NULL) {
|
|
warn("dns_sd: buffer record allocation failed");
|
|
return -1;
|
|
}
|
|
|
|
char *p = buf;
|
|
|
|
for (field = record; *field; field++) {
|
|
char *newp = stpcpy(p + 1, *field);
|
|
*p = newp - p - 1;
|
|
p = newp;
|
|
}
|
|
|
|
DNSServiceErrorType error;
|
|
error = DNSServiceRegister(&service, 0, kDNSServiceInterfaceIndexAny, ap1name, config.regtype, "",
|
|
NULL, htons((uint16_t)port), length, buf, NULL, NULL);
|
|
|
|
free(buf);
|
|
|
|
if (error == kDNSServiceErr_NoError)
|
|
return 0;
|
|
else {
|
|
warn("dns-sd: DNSServiceRegister error %d", error);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static void mdns_dns_sd_unregister(void) {
|
|
if (service) {
|
|
DNSServiceRefDeallocate(service);
|
|
service = NULL;
|
|
}
|
|
}
|
|
|
|
mdns_backend mdns_dns_sd = {.name = "dns-sd",
|
|
.mdns_register = mdns_dns_sd_register,
|
|
.mdns_unregister = mdns_dns_sd_unregister,
|
|
.mdns_dacp_monitor_start = NULL,
|
|
.mdns_dacp_monitor_set_id = NULL,
|
|
.mdns_dacp_monitor_stop = NULL};
|