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shairport.c
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/*
* Shairport, an Apple Airplay receiver
* Copyright (c) James Laird 2013
* All rights reserved.
* Modifications and additions (c) Mike Brady 2014--2023
*
* 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 <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <libconfig.h>
#include <libgen.h>
#include <memory.h>
#include <net/if.h>
#include <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "config.h"
#ifdef CONFIG_AIRPLAY_2
#include "ptp-utilities.h"
#include <gcrypt.h>
#include <libavcodec/avcodec.h>
#include <sodium.h>
#include <uuid/uuid.h>
#endif
#ifdef CONFIG_MBEDTLS
#include <mbedtls/md5.h>
#include <mbedtls/version.h>
#endif
#ifdef CONFIG_POLARSSL
#include <polarssl/md5.h>
#endif
#ifdef CONFIG_OPENSSL
#include <openssl/evp.h>
#include <openssl/md5.h>
#endif
#if defined(CONFIG_DBUS_INTERFACE)
#include <glib.h>
#endif
#include "activity_monitor.h"
#include "audio.h"
#include "common.h"
#include "rtp.h"
#include "rtsp.h"
#if defined(CONFIG_DACP_CLIENT)
#include "dacp.h"
#endif
#if defined(CONFIG_METADATA_HUB)
#include "metadata_hub.h"
#endif
#ifdef CONFIG_DBUS_INTERFACE
#include "dbus-service.h"
#endif
#ifdef CONFIG_MQTT
#include "mqtt.h"
#endif
#ifdef CONFIG_MPRIS_INTERFACE
#include "mpris-service.h"
#endif
#ifdef CONFIG_LIBDAEMON
#include <libdaemon/dexec.h>
#include <libdaemon/dfork.h>
#include <libdaemon/dlog.h>
#include <libdaemon/dpid.h>
#include <libdaemon/dsignal.h>
#else
#include <syslog.h>
#endif
#ifdef CONFIG_SOXR
#include <math.h>
#include <soxr.h>
#endif
#ifdef CONFIG_CONVOLUTION
#include <FFTConvolver/convolver.h>
#endif
#ifdef CONFIG_OPENBSD
#include <string.h> // strerror
#endif
pid_t pid;
#ifdef CONFIG_LIBDAEMON
int this_is_the_daemon_process = 0;
#endif
#ifndef UUID_STR_LEN
#define UUID_STR_LEN 36
#endif
#define strnull(s) ((s) ? (s) : "(null)")
pthread_t rtsp_listener_thread;
int killOption = 0;
int daemonisewith = 0;
int daemonisewithout = 0;
int log_to_syslog_selected = 0;
#ifdef CONFIG_LIBDAEMON
int log_to_default = 1; // needed if libdaemon used
#endif
int display_config_selected = 0;
int log_to_syslog_select_is_first_command_line_argument = 0;
char configuration_file_path[4096 + 1];
char *config_file_real_path = NULL;
char first_backend_name[256];
void print_version(void) {
char *version_string = get_version_string();
if (version_string) {
printf("%s\n", version_string);
free(version_string);
} else {
debug(1, "Can't print version string!");
}
}
#ifdef CONFIG_AIRPLAY_2
int has_fltp_capable_aac_decoder(void) {
// return 1 if the AAC decoder advertises fltp decoding capability, which
// is needed for decoding Buffered Audio streams
int has_capability = 0;
const AVCodec *codec = avcodec_find_decoder(AV_CODEC_ID_AAC);
if (codec != NULL) {
const enum AVSampleFormat *p = codec->sample_fmts;
if (p != NULL) {
while ((has_capability == 0) && (*p != AV_SAMPLE_FMT_NONE)) {
if (*p == AV_SAMPLE_FMT_FLTP)
has_capability = 1;
p++;
}
}
}
return has_capability;
}
#endif
#ifdef CONFIG_SOXR
pthread_t soxr_time_check_thread;
int soxr_time_check_thread_started = 0;
void *soxr_time_check(__attribute__((unused)) void *arg) {
const int buffer_length = 352;
int32_t inbuffer[buffer_length * 2];
int32_t outbuffer[(buffer_length + 1) * 2];
// int32_t *outbuffer = (int32_t*)malloc((buffer_length+1)*2*sizeof(int32_t));
// int32_t *inbuffer = (int32_t*)malloc((buffer_length)*2*sizeof(int32_t));
// generate a sample signal
const double frequency = 440; //
int i;
int number_of_iterations = 0;
uint64_t soxr_start_time = get_absolute_time_in_ns();
uint64_t loop_until_time =
(uint64_t)1500000000 + soxr_start_time; // loop for a second and a half, max -- no need to be
// able to cancel it, do _don't even try_!
while (get_absolute_time_in_ns() < loop_until_time) {
number_of_iterations++;
for (i = 0; i < buffer_length; i++) {
double w = sin(i * (frequency + number_of_iterations * 2) * 2 * M_PI / 44100);
int32_t wint = (int32_t)(w * INT32_MAX);
inbuffer[i * 2] = wint;
inbuffer[i * 2 + 1] = wint;
}
soxr_io_spec_t io_spec;
io_spec.itype = SOXR_INT32_I;
io_spec.otype = SOXR_INT32_I;
io_spec.scale = 1.0; // this seems to crash if not = 1.0
io_spec.e = NULL;
io_spec.flags = 0;
size_t odone;
soxr_oneshot(buffer_length, buffer_length + 1, 2, // Rates and # of chans.
inbuffer, buffer_length, NULL, // Input.
outbuffer, buffer_length + 1, &odone, // Output.
&io_spec, // Input, output and transfer spec.
NULL, NULL); // Default configuration.
io_spec.itype = SOXR_INT32_I;
io_spec.otype = SOXR_INT32_I;
io_spec.scale = 1.0; // this seems to crash if not = 1.0
io_spec.e = NULL;
io_spec.flags = 0;
soxr_oneshot(buffer_length, buffer_length - 1, 2, // Rates and # of chans.
inbuffer, buffer_length, NULL, // Input.
outbuffer, buffer_length - 1, &odone, // Output.
&io_spec, // Input, output and transfer spec.
NULL, NULL); // Default configuration.
}
int64_t soxr_execution_time =
get_absolute_time_in_ns() - soxr_start_time; // this must be zero or positive
int soxr_execution_time_int = soxr_execution_time; // must be in or around 1500000000
// free(outbuffer);
// free(inbuffer);
if (number_of_iterations != 0) {
config.soxr_delay_index = soxr_execution_time_int / number_of_iterations;
} else {
debug(1, "No soxr-timing iterations performed, so \"basic\" iteration will be used.");
config.soxr_delay_index = 0; // used as a flag
}
debug(2, "soxr_delay: %d nanoseconds, soxr_delay_threshold: %d milliseconds.",
config.soxr_delay_index, config.soxr_delay_threshold / 1000000);
if ((config.packet_stuffing == ST_soxr) &&
(config.soxr_delay_index > config.soxr_delay_threshold))
inform("Note: this device may be too slow for \"soxr\" interpolation. Consider choosing the "
"\"basic\" or \"auto\" interpolation setting.");
if (config.packet_stuffing == ST_auto)
debug(
1, "\"%s\" interpolation has been chosen.",
((config.soxr_delay_index != 0) && (config.soxr_delay_index <= config.soxr_delay_threshold))
? "soxr"
: "basic");
pthread_exit(NULL);
}
#endif
void usage(char *progname) {
#ifdef CONFIG_AIRPLAY_2
if (has_fltp_capable_aac_decoder() == 0) {
printf("\nIMPORTANT NOTE: Shairport Sync can not run on this system.\n");
printf("A Floating Planar (\"fltp\") AAC decoder is required, ");
printf("but the system's ffmpeg library does not seem to include one.\n");
printf("See: "
"https://github.com/mikebrady/shairport-sync/blob/development/"
"TROUBLESHOOTING.md#aac-decoder-issues-airplay-2-only\n\n");
} else {
#endif
// clang-format off
printf("Please use the configuration file for settings where possible.\n");
printf("Many more settings are available in the configuration file.\n");
printf("\n");
printf("Usage: %s [options...]\n", progname);
printf(" or: %s [options...] -- [audio output-specific options]\n", progname);
printf("\n");
printf("Options:\n");
printf(" -h, --help Show this help.\n");
printf(" -V, --version Show version information -- the version string.\n");
printf(" -X, --displayConfig Output OS information, version string, command line, configuration file and active settings to the log.\n");
printf(" --statistics Print some interesting statistics. More will be printed if -v / -vv / -vvv are also chosen.\n");
printf(" -v, --verbose Print debug information; -v some; -vv more; -vvv lots -- generally too much.\n");
printf(" -c, --configfile=FILE Read configuration settings from FILE. Default is %s.\n", configuration_file_path);
printf(" -a, --name=NAME Set service name. Default is the hostname with first letter capitalised.\n");
printf(" --password=PASSWORD Require PASSWORD to connect. Default is no password. (Classic AirPlay only.)\n");
printf(" -p, --port=PORT Set RTSP listening port. Default 5000; 7000 for AirPlay 2./\n");
printf(" -L, --latency=FRAMES [Deprecated] Set the latency for audio sent from an unknown device.\n");
printf(" The default is to set it automatically.\n");
printf(" -S, --stuffing=MODE Set how to adjust current latency to match desired latency, where:\n");
printf(" \"basic\" inserts or deletes audio frames from packet frames with low processor overhead, and\n");
printf(" \"soxr\" uses libsoxr to minimally resample packet frames -- moderate processor overhead.\n");
printf(" The default \"auto\" setting chooses basic or soxr depending on processor capability.\n");
printf(" The \"soxr\" option is only available if built with soxr support.\n");
printf(" -B, --on-start=PROGRAM Run PROGRAM when playback is about to begin.\n");
printf(" -E, --on-stop=PROGRAM Run PROGRAM when playback has ended.\n");
printf(" For -B and -E options, specify the full path to the program and arguments, e.g. \"/usr/bin/logger\".\n");
printf(" Executable scripts work, but the file must be marked executable have the appropriate shebang (#!/bin/sh) on the first line.\n");
printf(" -w, --wait-cmd Wait until the -B or -E programs finish before continuing.\n");
printf(" -o, --output=BACKEND Select audio backend. They are listed at the end of this text. The first one is the default.\n");
printf(" -m, --mdns=BACKEND Use the mDNS backend named BACKEND to advertise the AirPlay service through Bonjour/ZeroConf.\n");
printf(" They are listed at the end of this text.\n");
printf(" If no mdns backend is specified, they are tried in order until one works.\n");
printf(" -r, --resync=THRESHOLD [Deprecated] resync if error exceeds this number of frames. Set to 0 to stop resyncing.\n");
printf(" -t, --timeout=SECONDS Go back to idle mode from play mode after a break in communications of this many seconds (default 120). Set to 0 never to exit play mode.\n");
printf(" --tolerance=TOLERANCE [Deprecated] Allow a synchronization error of TOLERANCE frames (default 88) before trying to correct it.\n");
printf(" --logOutputLevel Log the output level setting -- a debugging option, useful for determining the optimum maximum volume.\n");
#ifdef CONFIG_LIBDAEMON
printf(" -d, --daemon Daemonise.\n");
printf(" -j, --justDaemoniseNoPIDFile Daemonise without a PID file.\n");
printf(" -k, --kill Kill the existing shairport daemon.\n");
#endif
#ifdef CONFIG_METADATA
printf(" -M, --metadata-enable Ask for metadata from the source and process it. Much more flexibility with configuration file settings.\n");
printf(" --metadata-pipename=PIPE send metadata to PIPE, e.g. --metadata-pipename=/tmp/%s-metadata.\n", config.appName);
printf(" The default is /tmp/%s-metadata.\n", config.appName);
printf(" -g, --get-coverart Include cover art in the metadata to be gathered and sent.\n");
#endif
printf(" --log-to-syslog Send debug and statistics information through syslog\n");
printf(" If used, this should be the first command line argument.\n");
printf(" -u, --use-stderr [Deprecated] This setting is not needed -- stderr is now used by default and syslog is selected using --log-to-syslog.\n");
printf("\n");
mdns_ls_backends();
printf("\n");
audio_ls_outputs();
// clang-format on
#ifdef CONFIG_AIRPLAY_2
}
#endif
}
int parse_options(int argc, char **argv) {
// there are potential memory leaks here -- it's called a second time, previously allocated
// strings will dangle.
char *raw_service_name = NULL; /* Used to pick up the service name before possibly expanding it */
char *stuffing = NULL; /* used for picking up the stuffing option */
signed char c; /* used for argument parsing */
// int i = 0; /* used for tracking options */
int resync_threshold_in_frames = 0;
int tolerance_in_frames = 0;
poptContext optCon; /* context for parsing command-line options */
struct poptOption optionsTable[] = {
{"verbose", 'v', POPT_ARG_NONE, NULL, 'v', NULL, NULL},
{"kill", 'k', POPT_ARG_NONE, &killOption, 0, NULL, NULL},
{"daemon", 'd', POPT_ARG_NONE, &daemonisewith, 0, NULL, NULL},
{"justDaemoniseNoPIDFile", 'j', POPT_ARG_NONE, &daemonisewithout, 0, NULL, NULL},
{"configfile", 'c', POPT_ARG_STRING, &config.configfile, 0, NULL, NULL},
{"statistics", 0, POPT_ARG_NONE, &config.statistics_requested, 0, NULL, NULL},
{"logOutputLevel", 0, POPT_ARG_NONE, &config.logOutputLevel, 0, NULL, NULL},
{"version", 'V', POPT_ARG_NONE, NULL, 0, NULL, NULL},
{"displayConfig", 'X', POPT_ARG_NONE, &display_config_selected, 0, NULL, NULL},
{"port", 'p', POPT_ARG_INT, &config.port, 0, NULL, NULL},
{"name", 'a', POPT_ARG_STRING, &raw_service_name, 0, NULL, NULL},
{"output", 'o', POPT_ARG_STRING, &config.output_name, 0, NULL, NULL},
{"on-start", 'B', POPT_ARG_STRING, &config.cmd_start, 0, NULL, NULL},
{"on-stop", 'E', POPT_ARG_STRING, &config.cmd_stop, 0, NULL, NULL},
{"wait-cmd", 'w', POPT_ARG_NONE, &config.cmd_blocking, 0, NULL, NULL},
{"mdns", 'm', POPT_ARG_STRING, &config.mdns_name, 0, NULL, NULL},
{"latency", 'L', POPT_ARG_INT, &config.userSuppliedLatency, 0, NULL, NULL},
{"stuffing", 'S', POPT_ARG_STRING, &stuffing, 'S', NULL, NULL},
{"resync", 'r', POPT_ARG_INT, &resync_threshold_in_frames, 'r', NULL, NULL},
{"timeout", 't', POPT_ARG_INT, &config.timeout, 't', NULL, NULL},
{"password", 0, POPT_ARG_STRING, &config.password, 0, NULL, NULL},
{"tolerance", 'z', POPT_ARG_INT, &tolerance_in_frames, 'z', NULL, NULL},
{"use-stderr", 'u', POPT_ARG_NONE, NULL, 'u', NULL, NULL},
{"log-to-syslog", 0, POPT_ARG_NONE, &log_to_syslog_selected, 0, NULL, NULL},
#ifdef CONFIG_METADATA
{"metadata-enable", 'M', POPT_ARG_NONE, &config.metadata_enabled, 'M', NULL, NULL},
{"metadata-pipename", 0, POPT_ARG_STRING, &config.metadata_pipename, 0, NULL, NULL},
{"get-coverart", 'g', POPT_ARG_NONE, &config.get_coverart, 'g', NULL, NULL},
#endif
POPT_AUTOHELP{NULL, 0, 0, NULL, 0, NULL, NULL}};
// we have to parse the command line arguments to look for a config file
int optind;
optind = argc;
int j;
for (j = 0; j < argc; j++)
if (strcmp(argv[j], "--") == 0)
optind = j;
optCon = poptGetContext(NULL, optind, (const char **)argv, optionsTable, 0);
if (optCon == NULL)
die("Can not get a secondary popt context.");
poptSetOtherOptionHelp(optCon, "[OPTIONS]* ");
/* Now do options processing just to get a debug log destination and level */
debuglev = 0;
while ((c = poptGetNextOpt(optCon)) >= 0) {
switch (c) {
case 'v':
debuglev++;
break;
case 'u':
inform("Warning: the option -u is no longer needed and is deprecated. Debug and statistics "
"output to STDERR is now the default. Use \"--log-to-syslog\" to revert.");
break;
case 'D':
inform("Warning: the option -D or --disconnectFromOutput is deprecated.");
break;
case 'R':
inform("Warning: the option -R or --reconnectToOutput is deprecated.");
break;
case 'A':
inform("Warning: the option -A or --AirPlayLatency is deprecated and ignored. This setting "
"is now "
"automatically received from the AirPlay device.");
break;
case 'i':
inform("Warning: the option -i or --iTunesLatency is deprecated and ignored. This setting is "
"now "
"automatically received from iTunes");
break;
case 'f':
inform(
"Warning: the option --forkedDaapdLatency is deprecated and ignored. This setting is now "
"automatically received from forkedDaapd");
break;
case 'r':
config.resync_threshold = (resync_threshold_in_frames * 1.0) / 44100;
inform("Warning: the option -r or --resync is deprecated. Please use the "
"\"resync_threshold_in_seconds\" setting in the config file instead.");
break;
case 'z':
config.tolerance = (tolerance_in_frames * 1.0) / 44100;
inform("Warning: the option --tolerance is deprecated. Please use the "
"\"drift_tolerance_in_seconds\" setting in the config file instead.");
break;
}
}
if (c < -1) {
die("%s: %s", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(c));
}
poptFreeContext(optCon);
if (log_to_syslog_selected) {
// if this was the first command line argument, it'll already have been chosen
if (log_to_syslog_select_is_first_command_line_argument == 0) {
inform("Suggestion: make \"--log-to-syslog\" the first command line argument to ensure "
"messages go to the syslog right from the beginning.");
}
#ifdef CONFIG_LIBDAEMON
log_to_default = 0; // a specific log output modality has been selected.
#endif
log_to_syslog();
}
#ifdef CONFIG_LIBDAEMON
if ((daemonisewith) && (daemonisewithout))
die("Select either daemonize_with_pid_file or daemonize_without_pid_file -- you have selected "
"both!");
if ((daemonisewith) || (daemonisewithout)) {
config.daemonise = 1;
if (daemonisewith)
config.daemonise_store_pid = 1;
};
#endif
config.audio_backend_silent_lead_in_time_auto =
1; // start outputting silence as soon as packets start arriving
config.default_airplay_volume = -24.0;
config.high_threshold_airplay_volume =
-16.0; // if the volume exceeds this, reset to the default volume if idle for the
// limit_to_high_volume_threshold_time_in_minutes time
config.limit_to_high_volume_threshold_time_in_minutes =
0; // after this time in minutes, if the volume is higher, use the default_airplay_volume
// volume for new play sessions.
config.fixedLatencyOffset = 11025; // this sounds like it works properly.
config.diagnostic_drop_packet_fraction = 0.0;
config.active_state_timeout = 10.0;
config.soxr_delay_threshold = 30 * 1000000; // the soxr measurement time (nanoseconds) of two
// oneshots must not exceed this if soxr interpolation
// is to be chosen automatically.
config.volume_range_hw_priority =
0; // if combining software and hardware volume control, give the software priority
// i.e. when reducing volume, reduce the sw first before reducing the software.
// this is because some hw mixers mute at the bottom of their range, and they don't always
// advertise this fact
config.resend_control_first_check_time =
0.10; // wait this many seconds before requesting the resending of a missing packet
config.resend_control_check_interval_time =
0.25; // wait this many seconds before again requesting the resending of a missing packet
config.resend_control_last_check_time =
0.10; // give up if the packet is still missing this close to when it's needed
config.missing_port_dacp_scan_interval_seconds =
2.0; // check at this interval if no DACP port number is known
config.minimum_free_buffer_headroom = 125; // leave approximately one second's worth of buffers
// free after calculating the effective latency.
// e.g. if we have 1024 buffers or 352 frames = 8.17 seconds and we have a nominal latency of 2.0
// seconds then we can add an offset of 5.17 seconds and still leave a second's worth of buffers
// for unexpected circumstances
#ifdef CONFIG_METADATA
/* Get the metadata setting. */
config.metadata_enabled = 1; // if metadata support is included, then enable it by default
config.get_coverart = 1; // if metadata support is included, then enable it by default
#endif
#ifdef CONFIG_CONVOLUTION
config.convolution_max_length = 8192;
#endif
config.loudness_reference_volume_db = -20;
#ifdef CONFIG_METADATA_HUB
config.cover_art_cache_dir = "/tmp/shairport-sync/.cache/coverart";
config.scan_interval_when_active =
1; // number of seconds between DACP server scans when playing something
config.scan_interval_when_inactive =
1; // number of seconds between DACP server scans when playing nothing
config.scan_max_bad_response_count =
5; // number of successive bad results to ignore before giving up
// config.scan_max_inactive_count =
// (365 * 24 * 60 * 60) / config.scan_interval_when_inactive; // number of scans to do before
// stopping if
// not made active again (not used)
#endif
#ifdef CONFIG_AIRPLAY_2
// the features code is a 64-bit number, but in the mDNS advertisement, the least significant 32
// bit are given first for example, if the features number is 0x1C340405F4A00, it will be given as
// features=0x405F4A00,0x1C340 in the mDNS string, and in a signed decimal number in the plist:
// 496155702020608 this setting here is the source of both the plist features response and the
// mDNS string.
// note: 0x300401F4A00 works but with weird delays and stuff
// config.airplay_features = 0x1C340405FCA00;
uint64_t mask =
((uint64_t)1 << 17) | ((uint64_t)1 << 16) | ((uint64_t)1 << 15) | ((uint64_t)1 << 50);
config.airplay_features =
0x1C340405D4A00 & (~mask); // APX + Authentication4 (b14) with no metadata (see below)
// Advertised with mDNS and returned with GET /info, see
// https://openairplay.github.io/airplay-spec/status_flags.html 0x4: Audio cable attached, no PIN
// required (transient pairing), 0x204: Audio cable attached, OneTimePairingRequired 0x604: Audio
// cable attached, OneTimePairingRequired, device was setup for Homekit access control
config.airplay_statusflags = 0x04;
// Set to NULL to work with transient pairing
config.airplay_pin = NULL;
// use the MAC address placed in config.hw_addr to generate the default airplay_device_id
uint64_t temporary_airplay_id = nctoh64(config.hw_addr);
temporary_airplay_id =
temporary_airplay_id >> 16; // we only use the first 6 bytes but have imported 8.
// now generate a UUID
// from https://stackoverflow.com/questions/51053568/generating-a-random-uuid-in-c
// with thanks
uuid_t binuuid;
uuid_generate_random(binuuid);
char *uuid = malloc(UUID_STR_LEN + 1); // leave space for the NUL at the end
// Produces a UUID string at uuid consisting of lower-case letters
uuid_unparse_lower(binuuid, uuid);
config.airplay_pi = uuid;
#endif
// config_setting_t *setting;
const char *str = 0;
int value = 0;
double dvalue = 0.0;
// debug(1, "Looking for the configuration file \"%s\".", config.configfile);
config_init(&config_file_stuff);
config_file_real_path = realpath(config.configfile, NULL);
if (config_file_real_path == NULL) {
debug(2, "can't resolve the configuration file \"%s\".", config.configfile);
} else {
debug(2, "looking for configuration file at full path \"%s\"", config_file_real_path);
/* Read the file. If there is an error, report it and exit. */
if (config_read_file(&config_file_stuff, config_file_real_path)) {
config_set_auto_convert(&config_file_stuff,
1); // allow autoconversion from int/float to int/float
// make config.cfg point to it
config.cfg = &config_file_stuff;
/* Get the Service Name. */
if (config_lookup_string(config.cfg, "general.name", &str)) {
raw_service_name = (char *)str;
}
#ifdef CONFIG_LIBDAEMON
/* Get the Daemonize setting. */
config_set_lookup_bool(config.cfg, "sessioncontrol.daemonize_with_pid_file", &daemonisewith);
/* Get the Just_Daemonize setting. */
config_set_lookup_bool(config.cfg, "sessioncontrol.daemonize_without_pid_file",
&daemonisewithout);
/* Get the directory path for the pid file created when the program is daemonised. */
if (config_lookup_string(config.cfg, "sessioncontrol.daemon_pid_dir", &str))
config.piddir = (char *)str;
#endif
/* Get the mdns_backend setting. */
if (config_lookup_string(config.cfg, "general.mdns_backend", &str))
config.mdns_name = (char *)str;
/* Get the output_backend setting. */
if (config_lookup_string(config.cfg, "general.output_backend", &str))
config.output_name = (char *)str;
/* Get the port setting. */
if (config_lookup_int(config.cfg, "general.port", &value)) {
if ((value < 0) || (value > 65535))
#ifdef CONFIG_AIRPLAY_2
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 7000",
value);
#else
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 5000",
value);
#endif
else
config.port = value;
}
/* Get the udp port base setting. */
if (config_lookup_int(config.cfg, "general.udp_port_base", &value)) {
if ((value < 0) || (value > 65535))
die("Invalid port number \"%sd\". It should be between 0 and 65535, default is 6001",
value);
else
config.udp_port_base = value;
}
/* Get the udp port range setting. This is number of ports that will be tried for free ports ,
* starting at the port base. Only three ports are needed. */
if (config_lookup_int(config.cfg, "general.udp_port_range", &value)) {
if ((value < 3) || (value > 65535))
die("Invalid port range \"%sd\". It should be between 3 and 65535, default is 10",
value);
else
config.udp_port_range = value;
}
/* Get the password setting. */
if (config_lookup_string(config.cfg, "general.password", &str))
config.password = (char *)str;
if (config_lookup_string(config.cfg, "general.interpolation", &str)) {
if (strcasecmp(str, "basic") == 0)
config.packet_stuffing = ST_basic;
else if (strcasecmp(str, "auto") == 0)
config.packet_stuffing = ST_auto;
else if (strcasecmp(str, "soxr") == 0)
#ifdef CONFIG_SOXR
config.packet_stuffing = ST_soxr;
#else
warn("The soxr option not available because this version of shairport-sync was built "
"without libsoxr "
"support. Change the \"general/interpolation\" setting in the configuration file.");
#endif
else
die("Invalid interpolation option choice \"%s\". It should be \"auto\", \"basic\" or "
"\"soxr\"",
str);
}
#ifdef CONFIG_SOXR
/* Get the soxr_delay_threshold setting. */
/* Convert between the input, given in milliseconds, and the stored values in nanoseconds. */
if (config_lookup_int(config.cfg, "general.soxr_delay_threshold", &value)) {
if ((value >= 1) && (value <= 100))
config.soxr_delay_threshold = value * 1000000;
else
warn("Invalid general soxr_delay_threshold setting option choice \"%d\". It should be "
"between 1 and 100, "
"inclusive. Default is %d (milliseconds).",
value, config.soxr_delay_threshold / 1000000);
}
#endif
/* Get the statistics setting. */
if (config_set_lookup_bool(config.cfg, "general.statistics",
&(config.statistics_requested))) {
warn("The \"general\" \"statistics\" setting is deprecated. Please use the \"diagnostics\" "
"\"statistics\" setting instead.");
}
/* The old drift tolerance setting. */
if (config_lookup_int(config.cfg, "general.drift", &value)) {
inform("The drift setting is deprecated. Use "
"drift_tolerance_in_seconds instead");
config.tolerance = 1.0 * value / 44100;
}
/* The old resync setting. */
if (config_lookup_int(config.cfg, "general.resync_threshold", &value)) {
inform("The resync_threshold setting is deprecated. Use "
"resync_threshold_in_seconds instead");
config.resync_threshold = 1.0 * value / 44100;
}
/* Get the drift tolerance setting. */
if (config_lookup_float(config.cfg, "general.drift_tolerance_in_seconds", &dvalue))
config.tolerance = dvalue;
/* Get the resync setting. */
if (config_lookup_float(config.cfg, "general.resync_threshold_in_seconds", &dvalue))
config.resync_threshold = dvalue;
/* Get the resync recovery time setting. */
if (config_lookup_float(config.cfg, "general.resync_recovery_time_in_seconds", &dvalue))
config.resync_recovery_time = dvalue;
/* Get the verbosity setting. */
if (config_lookup_int(config.cfg, "general.log_verbosity", &value)) {
warn("The \"general\" \"log_verbosity\" setting is deprecated. Please use the "
"\"diagnostics\" \"log_verbosity\" setting instead.");
if ((value >= 0) && (value <= 3))
debuglev = value;
else
die("Invalid log verbosity setting option choice \"%d\". It should be between 0 and 3, "
"inclusive.",
value);
}
/* Get the verbosity setting. */
if (config_lookup_int(config.cfg, "diagnostics.log_verbosity", &value)) {
if ((value >= 0) && (value <= 3))
debuglev = value;
else
die("Invalid diagnostics log_verbosity setting option choice \"%d\". It should be "
"between 0 and 3, "
"inclusive.",
value);
}
/* Get the config.debugger_show_file_and_line in debug messages setting. */
if (config_lookup_string(config.cfg, "diagnostics.log_show_file_and_line", &str)) {
if (strcasecmp(str, "no") == 0)
config.debugger_show_file_and_line = 0;
else if (strcasecmp(str, "yes") == 0)
config.debugger_show_file_and_line = 1;
else
die("Invalid diagnostics log_show_file_and_line option choice \"%s\". It should be "
"\"yes\" or \"no\"",
str);
}
/* Get the show elapsed time in debug messages setting. */
if (config_lookup_string(config.cfg, "diagnostics.log_show_time_since_startup", &str)) {
if (strcasecmp(str, "no") == 0)
config.debugger_show_elapsed_time = 0;
else if (strcasecmp(str, "yes") == 0)
config.debugger_show_elapsed_time = 1;
else
die("Invalid diagnostics log_show_time_since_startup option choice \"%s\". It should be "
"\"yes\" or \"no\"",
str);
}
/* Get the show relative time in debug messages setting. */
if (config_lookup_string(config.cfg, "diagnostics.log_show_time_since_last_message", &str)) {
if (strcasecmp(str, "no") == 0)
config.debugger_show_relative_time = 0;
else if (strcasecmp(str, "yes") == 0)
config.debugger_show_relative_time = 1;
else
die("Invalid diagnostics log_show_time_since_last_message option choice \"%s\". It "
"should be \"yes\" or \"no\"",
str);
}
/* Get the statistics setting. */
if (config_lookup_string(config.cfg, "diagnostics.statistics", &str)) {
if (strcasecmp(str, "no") == 0)
config.statistics_requested = 0;
else if (strcasecmp(str, "yes") == 0)
config.statistics_requested = 1;
else
die("Invalid diagnostics statistics option choice \"%s\". It should be \"yes\" or "
"\"no\"",
str);
}
/* Get the disable_resend_requests setting. */
if (config_lookup_string(config.cfg, "diagnostics.disable_resend_requests", &str)) {
config.disable_resend_requests = 0; // this is for legacy -- only set by -t 0
if (strcasecmp(str, "no") == 0)
config.disable_resend_requests = 0;
else if (strcasecmp(str, "yes") == 0)
config.disable_resend_requests = 1;
else
die("Invalid diagnostic disable_resend_requests option choice \"%s\". It should be "
"\"yes\" "
"or \"no\"",
str);
}
/* Get the drop packets setting. */
if (config_lookup_float(config.cfg, "diagnostics.drop_this_fraction_of_audio_packets",
&dvalue)) {
if ((dvalue >= 0.0) && (dvalue <= 3.0))
config.diagnostic_drop_packet_fraction = dvalue;
else
die("Invalid diagnostics drop_this_fraction_of_audio_packets setting \"%d\". It should "
"be "
"between 0.0 and 1.0, "
"inclusive.",
dvalue);
}
/* Get the diagnostics output default. */
if (config_lookup_string(config.cfg, "diagnostics.log_output_to", &str)) {
#ifdef CONFIG_LIBDAEMON
log_to_default = 0; // a specific log output modality has been selected.
#endif
if (strcasecmp(str, "syslog") == 0)
log_to_syslog();
else if (strcasecmp(str, "stdout") == 0) {
log_to_stdout();
} else if (strcasecmp(str, "stderr") == 0) {
log_to_stderr();
} else {
config.log_file_path = (char *)str;
config.log_fd = -1;
log_to_file();
}
}
/* Get the ignore_volume_control setting. */
if (config_lookup_string(config.cfg, "general.ignore_volume_control", &str)) {
if (strcasecmp(str, "no") == 0)
config.ignore_volume_control = 0;
else if (strcasecmp(str, "yes") == 0)
config.ignore_volume_control = 1;
else
die("Invalid ignore_volume_control option choice \"%s\". It should be \"yes\" or \"no\"",
str);
}
/* Get the optional volume_max_db setting. */
if (config_lookup_float(config.cfg, "general.volume_max_db", &dvalue)) {
// debug(1, "Max volume setting of %f dB", dvalue);
config.volume_max_db = dvalue;
config.volume_max_db_set = 1;
}
/* Get the optional default_volume setting. */
if (config_lookup_float(config.cfg, "general.default_airplay_volume", &dvalue)) {
// debug(1, "Default airplay volume setting of %f on the -30.0 to 0 scale", dvalue);
if ((dvalue >= -30.0) && (dvalue <= 0.0)) {
config.default_airplay_volume = dvalue;
} else {
warn("The default airplay volume setting must be between -30.0 and 0.0.");
}
}
/* Get the optional high_volume_threshold setting. */
if (config_lookup_float(config.cfg, "general.high_threshold_airplay_volume", &dvalue)) {
// debug(1, "High threshold airplay volume setting of %f on the -30.0 to 0 scale", dvalue);
if ((dvalue >= -30.0) && (dvalue <= 0.0)) {
config.high_threshold_airplay_volume = dvalue;
} else {
warn("The high threshold airplay volume setting must be between -30.0 and 0.0.");
}
}
/* Get the optional high volume idle tiomeout setting. */
if (config_lookup_float(config.cfg, "general.high_volume_idle_timeout_in_minutes", &dvalue)) {
// debug(1, "High high_volume_idle_timeout_in_minutes setting of %f", dvalue);
if (dvalue >= 0.0) {
config.limit_to_high_volume_threshold_time_in_minutes = dvalue;
} else {
warn("The high volume idle timeout in minutes setting must be 0.0 or greater. A setting "
"of 0.0 disables the high volume check.");
}
}
if (config_lookup_string(config.cfg, "general.run_this_when_volume_is_set", &str)) {
config.cmd_set_volume = (char *)str;
}
/* Get the playback_mode setting */
if (config_lookup_string(config.cfg, "general.playback_mode", &str)) {
if (strcasecmp(str, "stereo") == 0)
config.playback_mode = ST_stereo;
else if (strcasecmp(str, "mono") == 0)
config.playback_mode = ST_mono;
else if (strcasecmp(str, "reverse stereo") == 0)
config.playback_mode = ST_reverse_stereo;
else if (strcasecmp(str, "both left") == 0)
config.playback_mode = ST_left_only;
else if (strcasecmp(str, "both right") == 0)
config.playback_mode = ST_right_only;
else
die("Invalid playback_mode choice \"%s\". It should be \"stereo\" (default), \"mono\", "
"\"reverse stereo\", \"both left\", \"both right\"",
str);
}
/* Get the volume control profile setting -- "standard" or "flat" */
if (config_lookup_string(config.cfg, "general.volume_control_profile", &str)) {
if (strcasecmp(str, "standard") == 0)
config.volume_control_profile = VCP_standard;
else if (strcasecmp(str, "flat") == 0)
config.volume_control_profile = VCP_flat;
else if (strcasecmp(str, "dasl_tapered") == 0)
config.volume_control_profile = VCP_dasl_tapered;
else
die("Invalid volume_control_profile choice \"%s\". It should be \"standard\" (default), "
"\"dasl_tapered\", or \"flat\"",
str);
}
config_set_lookup_bool(config.cfg, "general.volume_control_combined_hardware_priority",
&config.volume_range_hw_priority);
/* Get the interface to listen on, if specified Default is all interfaces */
/* we keep the interface name and the index */
if (config_lookup_string(config.cfg, "general.interface", &str))
config.interface = strdup(str);
if (config_lookup_string(config.cfg, "general.interface", &str)) {
config.interface_index = if_nametoindex(config.interface);
if (config.interface_index == 0) {
inform(
"The mdns service interface \"%s\" was not found, so the setting has been ignored.",
config.interface);
free(config.interface);
config.interface = NULL;
}
}
/* Get the regtype -- the service type and protocol, separated by a dot. Default is
* "_raop._tcp" */
if (config_lookup_string(config.cfg, "general.regtype", &str))
config.regtype = strdup(str);
/* Get the volume range, in dB, that should be used If not set, it means you just use the
* range set by the mixer. */
if (config_lookup_int(config.cfg, "general.volume_range_db", &value)) {
if ((value < 30) || (value > 150))
die("Invalid volume range %d dB. It should be between 30 and 150 dB. Zero means use "
"the mixer's native range. The setting reamins at %d.",
value, config.volume_range_db);
else
config.volume_range_db = value;
}
/* Get the alac_decoder setting. */
if (config_lookup_string(config.cfg, "general.alac_decoder", &str)) {
if (strcasecmp(str, "hammerton") == 0)
config.use_apple_decoder = 0;
else if (strcasecmp(str, "apple") == 0) {
if ((config.decoders_supported & 1 << decoder_apple_alac) != 0)
config.use_apple_decoder = 1;
else
inform("Support for the Apple ALAC decoder has not been compiled into this version of "
"Shairport Sync. The default decoder will be used.");
} else
die("Invalid alac_decoder option choice \"%s\". It should be \"hammerton\" or \"apple\"",
str);
}
/* Get the resend control settings. */
if (config_lookup_float(config.cfg, "general.resend_control_first_check_time", &dvalue)) {
if ((dvalue >= 0.0) && (dvalue <= 3.0))
config.resend_control_first_check_time = dvalue;
else
warn("Invalid general resend_control_first_check_time setting \"%f\". It should "
"be "
"between 0.0 and 3.0, "
"inclusive. The setting remains at %f seconds.",
dvalue, config.resend_control_first_check_time);
}
if (config_lookup_float(config.cfg, "general.resend_control_check_interval_time", &dvalue)) {
if ((dvalue >= 0.0) && (dvalue <= 3.0))
config.resend_control_check_interval_time = dvalue;
else
warn("Invalid general resend_control_check_interval_time setting \"%f\". It should "
"be "
"between 0.0 and 3.0, "
"inclusive. The setting remains at %f seconds.",
dvalue, config.resend_control_check_interval_time);
}
if (config_lookup_float(config.cfg, "general.resend_control_last_check_time", &dvalue)) {
if ((dvalue >= 0.0) && (dvalue <= 3.0))
config.resend_control_last_check_time = dvalue;
else
warn("Invalid general resend_control_last_check_time setting \"%f\". It should "