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11052b789630295f259e8622bbf748c0b49da2fc
shairport-sync/metadata/hub.c
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Mike Brady 11052b7896 Lot of changes here. 
1. check_classic_mac_basic.yml — update to latest macOS-latest
2. docker-on-push-tag-or-pr — dependant updates
3. FFTConvolver — fix a compilation warning when the DEBUG flag is turned off
4. Reorganise some source files — e.g. move most of the metadata stuff into a subdirectory
5. Remove unused special-purpose AirPlay 2 RC event handler.
6. Reorganise source files and source code relating to the standard event handler.
7. Check configuration settings a little more carefully to offer more meaningful diagnostics.
8. Add password to AirPlay 2 and reorganise initialisation to set AirPlay 2 flags accordingly.  Also, remove redundant airplay_pin.
9. Remove redundant debug facility definitions from common.h
10. Make it possible to omit all the dacp stuff from a build.
11. Make it possible to omit metadata multicast from a build.
12. Add AP2-native metadata by setting bit 50 of features to true.
13. Improve stability when pre-empting an existing play session.
14. Fix a few compiler warnings in the pair_ap library.
15. Ensure that the audio format is known before starting synchronisation.
16. Improve handle_configure to set/clear a new config setting. Doesn’t seem to do anything…
17. Experimentally turn off bit 46 of AirPlay 2 features — seems to stop failing pair-verify attempts.
2026-04-26 10:23:18 +01:00

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/*
* Metadata hub and access methods.
* Basically, if you need to store metadata
* (e.g. for use with the dbus interfaces),
* then you need a metadata hub,
* where everything is stored
* This file is part of Shairport Sync.
* Copyright (c) Mike Brady 2017--2026
* 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 <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "config.h"
#include "common.h"
#include "dacp.h"
#include "hub.h"
#include "pc_queue.h"
#include "core.h"
#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>
#endif
// metadata queue definitions
pc_queue metadata_hub_queue;
#define metadata_hub_queue_size 500
metadata_package metadata_hub_queue_items[metadata_hub_queue_size];
pthread_t metadata_hub_thread;
struct metadata_bundle metadata_store;
int metadata_hub_initialised = 0;
pthread_rwlock_t metadata_hub_re_lock = PTHREAD_RWLOCK_INITIALIZER;
int string_update(char **str, int *flag, char *s) {
if (s)
return string_update_with_size(str, flag, s, strlen(s));
else
return string_update_with_size(str, flag, NULL, 0);
}
void metadata_hub_init(void) {
// debug(1, "Metadata bundle initialisation.");
memset(&metadata_store, 0, sizeof(metadata_store));
metadata_hub_initialised = 1;
}
void metadata_hub_stop(void) {}
void add_metadata_watcher(metadata_watcher fn, void *userdata) {
int i;
for (i = 0; i < number_of_watchers; i++) {
if (metadata_store.watchers[i] == NULL) {
metadata_store.watchers[i] = fn;
metadata_store.watchers_data[i] = userdata;
// debug(1, "Added a metadata watcher into slot %d", i);
break;
}
}
}
void run_metadata_watchers(void) {
int i;
for (i = 0; i < number_of_watchers; i++) {
if (metadata_store.watchers[i]) {
metadata_store.watchers[i](&metadata_store, metadata_store.watchers_data[i]);
}
}
// turn off changed flags
metadata_store.cover_art_pathname_changed = 0;
metadata_store.client_ip_changed = 0;
metadata_store.client_name_changed = 0;
metadata_store.server_ip_changed = 0;
metadata_store.progress_string_changed = 0;
metadata_store.item_id_changed = 0;
metadata_store.item_composite_id_changed = 0;
metadata_store.artist_name_changed = 0;
metadata_store.album_artist_name_changed = 0;
metadata_store.album_name_changed = 0;
metadata_store.song_data_kind_changed = 0;
metadata_store.track_name_changed = 0;
metadata_store.genre_changed = 0;
metadata_store.comment_changed = 0;
metadata_store.composer_changed = 0;
metadata_store.file_kind_changed = 0;
metadata_store.song_description_changed = 0;
metadata_store.song_album_artist_changed = 0;
metadata_store.sort_artist_changed = 0;
metadata_store.sort_album_changed = 0;
metadata_store.sort_composer_changed = 0;
metadata_store.songtime_in_milliseconds_changed = 0;
}
void metadata_hub_unlock_hub_mutex_cleanup(__attribute__((unused)) void *arg) {
debug(1, "metadata_hub_unlock_hub_mutex_cleanup called.");
metadata_hub_modify_epilog(0);
}
char *last_metadata_hub_modify_prolog_file = NULL;
int last_metadata_hub_modify_prolog_line;
int metadata_hub_re_lock_access_is_delayed;
void _metadata_hub_modify_prolog(const char *filename, const int linenumber) {
// always run this before changing an entry or a sequence of entries in the metadata_hub
// debug(1, "locking metadata hub for writing");
if (pthread_rwlock_trywrlock(&metadata_hub_re_lock) != 0) {
if (last_metadata_hub_modify_prolog_file)
debug(3, "Metadata_hub write lock at \"%s:%d\" is already taken at \"%s:%d\" -- must wait.",
filename, linenumber, last_metadata_hub_modify_prolog_file,
last_metadata_hub_modify_prolog_line);
else
debug(2, "Metadata_hub write lock is already taken by unknown -- must wait.");
metadata_hub_re_lock_access_is_delayed = 0;
pthread_rwlock_wrlock(&metadata_hub_re_lock);
debug(3, "Okay -- acquired the metadata_hub write lock at \"%s:%d\".", filename, linenumber);
} else {
if (last_metadata_hub_modify_prolog_file) {
free(last_metadata_hub_modify_prolog_file);
}
last_metadata_hub_modify_prolog_file = strdup(filename);
last_metadata_hub_modify_prolog_line = linenumber;
// debug(3, "Metadata_hub write lock acquired.");
}
metadata_hub_re_lock_access_is_delayed = 0;
}
void _metadata_hub_modify_epilog(int modified, const char *filename, const int linenumber) {
metadata_store.dacp_server_has_been_active =
metadata_store.dacp_server_active; // set the scanner_has_been_active now.
if (modified) {
run_metadata_watchers();
}
if (metadata_hub_re_lock_access_is_delayed) {
if (last_metadata_hub_modify_prolog_file) {
debug(1, "Metadata_hub write lock taken at \"%s:%d\" is freed at \"%s:%d\".",
last_metadata_hub_modify_prolog_file, last_metadata_hub_modify_prolog_line, filename,
linenumber);
free(last_metadata_hub_modify_prolog_file);
last_metadata_hub_modify_prolog_file = NULL;
} else {
debug(1, "Metadata_hub write lock taken at an unknown place is freed at \"%s:%d\".", filename,
linenumber);
}
}
pthread_rwlock_unlock(&metadata_hub_re_lock);
// debug(3, "Metadata_hub write lock unlocked.");
}
/*
void _metadata_hub_read_prolog(const char *filename, const int linenumber) {
// always run this before reading an entry or a sequence of entries in the metadata_hub
// debug(1, "locking metadata hub for reading");
if (pthread_rwlock_tryrdlock(&metadata_hub_re_lock) != 0) {
debug(1, "Metadata_hub read lock is already taken -- must wait.");
pthread_rwlock_rdlock(&metadata_hub_re_lock);
debug(1, "Okay -- acquired the metadata_hub read lock.");
}
}
void _metadata_hub_read_epilog(const char *filename, const int linenumber) {
// always run this after reading an entry or a sequence of entries in the metadata_hub
// debug(1, "unlocking metadata hub for reading");
pthread_rwlock_unlock(&metadata_hub_re_lock);
}
*/
char *metadata_write_image_file(const char *buf, int len) {
// warning -- this removes all files from the directory apart from this one, if it exists
// it will return a path to the image file allocated with malloc.
// free it if you don't need it.
char *path = NULL; // this will be what is returned
if (strcmp(config.cover_art_cache_dir, "") != 0) { // an empty string means do not write the file
uint8_t img_md5[16];
// uint8_t ap_md5[16];
#ifdef CONFIG_OPENSSL
EVP_MD_CTX *ctx;
unsigned int img_md5_len = EVP_MD_size(EVP_md5());
ctx = EVP_MD_CTX_new();
EVP_DigestInit_ex(ctx, EVP_md5(), NULL);
EVP_DigestUpdate(ctx, buf, len);
EVP_DigestFinal_ex(ctx, img_md5, &img_md5_len);
EVP_MD_CTX_free(ctx);
#endif
#ifdef CONFIG_MBEDTLS
#if MBEDTLS_VERSION_MINOR >= 7
mbedtls_md5_context tctx;
mbedtls_md5_starts_ret(&tctx);
mbedtls_md5_update_ret(&tctx, (const unsigned char *)buf, len);
mbedtls_md5_finish_ret(&tctx, img_md5);
#else
mbedtls_md5_context tctx;
mbedtls_md5_starts(&tctx);
mbedtls_md5_update(&tctx, (const unsigned char *)buf, len);
mbedtls_md5_finish(&tctx, img_md5);
#endif
#endif
#ifdef CONFIG_POLARSSL
md5_context tctx;
md5_starts(&tctx);
md5_update(&tctx, (const unsigned char *)buf, len);
md5_finish(&tctx, img_md5);
#endif
char img_md5_str[33];
memset(img_md5_str, 0, sizeof(img_md5_str));
char *ext;
char png[] = "png";
char jpg[] = "jpg";
int i;
for (i = 0; i < 16; i++)
snprintf(&img_md5_str[i * 2], 3, "%02x", (uint8_t)img_md5[i]);
// see if the file is a jpeg or a png
if (strncmp(buf, "\xFF\xD8\xFF", 3) == 0)
ext = jpg;
else if (strncmp(buf, "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A", 8) == 0)
ext = png;
else {
debug(1, "Unidentified image type of cover art -- jpg extension used.");
ext = jpg;
}
mode_t oldumask = umask(000);
int result = mkpath(config.cover_art_cache_dir, 0777);
umask(oldumask);
if ((result == 0) || (result == -EEXIST)) {
// see if the file exists by opening it.
// if it exists, we're done
char *prefix = "cover-";
size_t pl = strlen(config.cover_art_cache_dir) + 1 + strlen(prefix) + strlen(img_md5_str) +
1 + strlen(ext);
path = malloc(pl + 1);
snprintf(path, pl + 1, "%s/%s%s.%s", config.cover_art_cache_dir, prefix, img_md5_str, ext);
int cover_fd = open(path, O_WRONLY | O_CREAT | O_EXCL, S_IRWXU | S_IRGRP | S_IROTH);
if (cover_fd > 0) {
// write the contents
if (write(cover_fd, buf, len) < len) {
warn("Writing cover art file \"%s\" failed!", path);
free(path);
path = NULL;
}
close(cover_fd);
// now delete all other files, if requested
if (config.retain_coverart == 0) {
DIR *d;
struct dirent *dir;
d = opendir(config.cover_art_cache_dir);
if (d) {
int fnl = strlen(prefix) + strlen(img_md5_str) + 1 + strlen(ext) + 1;
char *full_filename = malloc(fnl);
if (full_filename == NULL)
die("Can't allocate memory at metadata_write_image_file.");
memset(full_filename, 0, fnl);
snprintf(full_filename, fnl, "%s%s.%s", prefix, img_md5_str, ext);
int dir_fd = open(config.cover_art_cache_dir, O_DIRECTORY);
if (dir_fd > 0) {
while ((dir = readdir(d)) != NULL) {
if (dir->d_type == DT_REG) {
if (strcmp(full_filename, dir->d_name) != 0) {
if (unlinkat(dir_fd, dir->d_name, 0) != 0) {
debug(1, "Error %d deleting cover art file \"%s\".", errno, dir->d_name);
}
}
}
}
if (close(dir_fd) < 0)
debug(1, "Error %d closing directory \"%s\"", errno, config.cover_art_cache_dir);
} else {
debug(1, "Can't open the directory \"%s\" for deletion -- error %d.",
config.cover_art_cache_dir, errno);
}
free(full_filename);
closedir(d);
}
}
} else {
// if (errno == EEXIST)
// debug(1, "Cover art file \"%s\" already exists!", path);
// else {
if (errno != EEXIST) {
warn("Could not open file \"%s\" for writing cover art", path);
free(path);
path = NULL;
}
}
} else {
debug(1, "Couldn't access or create the cover art cache directory \"%s\".",
config.cover_art_cache_dir);
}
}
return path;
}
int metadata_packet_item_changed = 0; // set if any parsed part of a metadata stream changes
void metadata_hub_process_metadata(uint32_t type, uint32_t code, char *data, uint32_t length) {
// metadata coming in from the audio source or from Shairport Sync itself passes through here
// this has more information about tags, which might be relevant:
// https://code.google.com/p/ytrack/wiki/DMAP
// Some metadata items are contained in one metadata packet.
// The start of the metadata packet is signalled by an 'ssnc' 'mdst' item and
// the end of it by an 'ssnc 'mden' item.
// We don't set "changed" for them individually; instead we set it when the 'mden' token
// comes in if the metadata_packet_item_changed item is set by parsed items
// within the packet.
int changed = 0;
metadata_hub_modify_prolog();
pthread_cleanup_push(metadata_hub_unlock_hub_mutex_cleanup, NULL);
char *cs;
if (type == 'core') {
switch (code) {
case 'asdk': {
// get the one-byte number as an unsigned number
int song_data_kind = data[0]; // one byte
song_data_kind = song_data_kind & 0xFF; // unsigned
debug(3, "MH Song Data Kind seen: \"%d\" of length %u.", song_data_kind, length);
if ((song_data_kind != metadata_store.song_data_kind) ||
(metadata_store.song_data_kind_is_valid == 0)) {
metadata_store.song_data_kind = song_data_kind;
metadata_store.song_data_kind_changed = 1;
metadata_store.song_data_kind_is_valid = 1;
debug(3, "MH Song Data Kind set to: \"%d\"", metadata_store.song_data_kind);
metadata_packet_item_changed = 1;
}
} break;
case 'mper': {
// get the 64-bit number as a uint64_t by reading two uint32_t s and combining them
uint64_t vl = ntohl(*(uint32_t *)data); // get the high order 32 bits
vl = vl << 32; // shift them into the correct location
uint64_t ul = ntohl(*(uint32_t *)(data + sizeof(uint32_t))); // and the low order 32 bits
vl = vl + ul;
debug(4, "MH Item ID seen: \"%" PRIx64 "\" of length %u.", vl, length);
if ((vl != metadata_store.item_id) || (metadata_store.item_id_is_valid == 0)) {
metadata_store.item_id = vl;
metadata_store.item_id_changed = 1;
metadata_store.item_id_is_valid = 1;
debug(3, "MH Item ID set to: \"%" PRIx64 "\"", metadata_store.item_id);
metadata_packet_item_changed = 1;
}
} break;
case 'astm': {
uint32_t ui = ntohl(*(uint32_t *)data);
debug(3, "MH Song Time seen: \"%u\" of length %u.", ui, length);
if ((ui != metadata_store.songtime_in_milliseconds) ||
(metadata_store.songtime_in_milliseconds_is_valid == 0)) {
metadata_store.songtime_in_milliseconds = ui;
metadata_store.songtime_in_milliseconds_changed = 1;
metadata_store.songtime_in_milliseconds_is_valid = 1;
debug(3, "MH Song Time set to: \"%u\"", metadata_store.songtime_in_milliseconds);
metadata_packet_item_changed = 1;
}
} break;
case 'asal':
cs = strndup(data, length);
if (string_update(&metadata_store.album_name, &metadata_store.album_name_changed, cs)) {
debug(3, "MH Album name set to: \"%s\"", metadata_store.album_name);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'asar':
cs = strndup(data, length);
if (string_update(&metadata_store.artist_name, &metadata_store.artist_name_changed, cs)) {
debug(3, "MH Artist name set to: \"%s\"", metadata_store.artist_name);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'assl':
cs = strndup(data, length);
if (string_update(&metadata_store.album_artist_name,
&metadata_store.album_artist_name_changed, cs)) {
debug(3, "MH Album Artist name set to: \"%s\"", metadata_store.album_artist_name);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'ascm':
cs = strndup(data, length);
if (string_update(&metadata_store.comment, &metadata_store.comment_changed, cs)) {
debug(3, "MH Comment set to: \"%s\"", metadata_store.comment);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'asgn':
cs = strndup(data, length);
if (string_update(&metadata_store.genre, &metadata_store.genre_changed, cs)) {
debug(3, "MH Genre set to: \"%s\"", metadata_store.genre);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'minm':
cs = strndup(data, length);
if (string_update(&metadata_store.track_name, &metadata_store.track_name_changed, cs)) {
debug(3, "MH Track Name set to: \"%s\"", metadata_store.track_name);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'ascp':
cs = strndup(data, length);
if (string_update(&metadata_store.composer, &metadata_store.composer_changed, cs)) {
debug(3, "MH Composer set to: \"%s\"", metadata_store.composer);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'asdt':
cs = strndup(data, length);
if (string_update(&metadata_store.song_description, &metadata_store.song_description_changed,
cs)) {
debug(3, "MH Song Description set to: \"%s\"", metadata_store.song_description);
}
free(cs);
break;
case 'asaa':
cs = strndup(data, length);
if (string_update(&metadata_store.song_album_artist,
&metadata_store.song_album_artist_changed, cs)) {
debug(3, "MH Song Album Artist set to: \"%s\"", metadata_store.song_album_artist);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'assn':
cs = strndup(data, length);
if (string_update(&metadata_store.sort_name, &metadata_store.sort_name_changed, cs)) {
debug(3, "MH Sort Name set to: \"%s\"", metadata_store.sort_name);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'assa':
cs = strndup(data, length);
if (string_update(&metadata_store.sort_artist, &metadata_store.sort_artist_changed, cs)) {
debug(3, "MH Sort Artist set to: \"%s\"", metadata_store.sort_artist);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'assu':
cs = strndup(data, length);
if (string_update(&metadata_store.sort_album, &metadata_store.sort_album_changed, cs)) {
debug(3, "MH Sort Album set to: \"%s\"", metadata_store.sort_album);
metadata_packet_item_changed = 1;
}
free(cs);
break;
case 'assc':
cs = strndup(data, length);
if (string_update(&metadata_store.sort_composer, &metadata_store.sort_composer_changed, cs)) {
debug(3, "MH Sort Composer set to: \"%s\"", metadata_store.sort_composer);
metadata_packet_item_changed = 1;
}
free(cs);
default:
/*
{
char typestring[5];
*(uint32_t *)typestring = htonl(type);
typestring[4] = 0;
char codestring[5];
*(uint32_t *)codestring = htonl(code);
codestring[4] = 0;
char *payload;
if (length < 2048)
payload = strndup(data, length);
else
payload = NULL;
debug(1, "MH \"%s\" \"%s\" (%d bytes): \"%s\".", typestring, codestring, length,
payload);
if (payload)
free(payload);
}
*/
break;
}
} else if (type == 'ssnc') {
switch (code) {
// ignore the following
case 'pcst':
case 'pcen':
break;
case 'mdst':
debug(4, "MH Metadata stream processing start.");
metadata_packet_item_changed = 0;
break;
case 'mden':
if (metadata_packet_item_changed != 0)
debug(3, "MH Metadata stream processing end with changes.");
else
debug(4, "MH Metadata stream processing end without changes.");
changed = metadata_packet_item_changed;
break;
case 'PICT':
debug(3, "MH Picture received, length %u bytes.", length);
char uri[2048];
if ((length > 16) &&
(strcmp(config.cover_art_cache_dir, "") != 0)) { // if it's okay to write the file
// make this uncancellable
int oldState;
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldState); // make this un-cancellable
char *pathname = metadata_write_image_file(data, length);
snprintf(uri, sizeof(uri), "file://%s", pathname);
free(pathname);
pthread_setcancelstate(oldState, NULL);
} else {
uri[0] = '\0';
}
if (string_update(&metadata_store.cover_art_pathname,
&metadata_store.cover_art_pathname_changed,
uri)) // if the picture's file path is different from the stored one...
changed = 1;
else
changed = 0;
// pthread_cleanup_pop(0); // don't remove the lock -- it'll have been done
break;
case 'clip':
cs = strndup(data, length);
if (string_update(&metadata_store.client_ip, &metadata_store.client_ip_changed, cs)) {
changed = 1;
debug(3, "MH Client IP set to: \"%s\"", metadata_store.client_ip);
}
free(cs);
break;
case 'snam':
cs = strndup(data, length);
if (string_update(&metadata_store.client_name, &metadata_store.client_name_changed, cs)) {
changed = 1;
debug(3, "MH Client Name set to: \"%s\"", metadata_store.client_name);
}
free(cs);
break;
case 'prgr':
cs = strndup(data, length);
if (string_update(&metadata_store.progress_string, &metadata_store.progress_string_changed,
cs)) {
changed = 1;
debug(3, "MH Progress String set to: \"%s\"", metadata_store.progress_string);
}
free(cs);
break;
case 'phbt':
cs = strndup(data, length);
if (string_update(&metadata_store.frame_position_string,
&metadata_store.frame_position_string_changed, cs)) {
changed = 1;
debug(3, "MH Frame Position String set to: \"%s\"", metadata_store.frame_position_string);
}
free(cs);
break;
case 'phb0':
cs = strndup(data, length);
if (string_update(&metadata_store.first_frame_position_string,
&metadata_store.first_frame_position_string_changed, cs)) {
changed = 1;
debug(3, "MH First Frame Position String set to: \"%s\"",
metadata_store.first_frame_position_string);
}
free(cs);
break;
case 'styp':
cs = strndup(data, length);
if (string_update(&metadata_store.stream_type, &metadata_store.stream_type_changed, cs)) {
changed = 1;
debug(3, "MH Stream Type set to: \"%s\"", metadata_store.stream_type);
}
free(cs);
break;
case 'sdsc':
cs = strndup(data, length);
if (string_update(&metadata_store.source_format, &metadata_store.source_format_changed, cs)) {
changed = 1;
debug(3, "MH Source Format set to: \"%s\"", metadata_store.source_format);
}
free(cs);
break;
case 'odsc':
cs = strndup(data, length);
if (string_update(&metadata_store.output_format, &metadata_store.output_format_changed, cs)) {
changed = 1;
debug(3, "MH Output Format set to: \"%s\"", metadata_store.output_format);
}
free(cs);
break;
case 'svip':
cs = strndup(data, length);
if (string_update(&metadata_store.server_ip, &metadata_store.server_ip_changed, cs)) {
changed = 1;
debug(3, "MH Server IP set to: \"%s\"", metadata_store.server_ip);
}
free(cs);
break;
case 'abeg':
changed = (metadata_store.active_state != AM_ACTIVE);
metadata_store.active_state = AM_ACTIVE;
break;
case 'aend':
changed = (metadata_store.active_state != AM_INACTIVE);
metadata_store.active_state = AM_INACTIVE;
break;
case 'pres':
case 'pbeg':
changed = ((metadata_store.player_state != PS_PLAYING) ||
(metadata_store.player_thread_active == 0));
metadata_store.player_state = PS_PLAYING;
metadata_store.player_thread_active = 1;
break;
case 'pend':
changed = ((metadata_store.player_state != PS_STOPPED) ||
(metadata_store.player_thread_active == 1));
metadata_store.player_state = PS_STOPPED;
metadata_store.player_thread_active = 0;
break;
case 'paus':
changed = (metadata_store.player_state != PS_PAUSED);
metadata_store.player_state = PS_PAUSED;
break;
/*
// not using this anymore.
case 'pffr': // this is sent when the first frame has been received
case 'prsm':
changed = (metadata_store.player_state != PS_PLAYING);
metadata_store.player_state = PS_PLAYING;
break;
*/
case 'pvol': {
// Note: it's assumed that the config.airplay volume has already been correctly set.
// int32_t actual_volume;
// int gv = dacp_get_volume(&actual_volume);
// metadata_hub_modify_prolog();
// if ((gv == 200) && (metadata_store.speaker_volume != actual_volume)) {
// metadata_store.speaker_volume = actual_volume;
// changed = 1;
//}
if (metadata_store.airplay_volume != config.airplay_volume) {
metadata_store.airplay_volume = config.airplay_volume;
changed = 1;
}
} break;
default: {
char typestring[5];
uint32_t tm = htonl(type);
memcpy(typestring, &tm, sizeof(uint32_t));
typestring[4] = 0;
char codestring[5];
uint32_t cm = htonl(code);
memcpy(codestring, &cm, sizeof(uint32_t));
codestring[4] = 0;
char *payload;
if (length < 2048)
payload = strndup(data, length);
else
payload = NULL;
// debug(1, "MH \"%s\" \"%s\" (%d bytes): \"%s\".", typestring, codestring, length, payload);
if (payload)
free(payload);
}
}
}
pthread_cleanup_pop(0); // don't remove the lock
metadata_hub_modify_epilog(changed);
}
void metadata_hub_close(void) {}
void metadata_hub_thread_cleanup_function(__attribute__((unused)) void *arg) {
// debug(2, "metadata_hub_thread_cleanup_function called");
metadata_hub_close();
}
void *metadata_hub_thread_function(__attribute__((unused)) void *ignore) {
// #include <syscall.h>
// debug(1, "metadata_hub_thread_function PID %d", syscall(SYS_gettid));
metadata_package pack;
pthread_cleanup_push(metadata_hub_thread_cleanup_function, NULL);
while (1) {
pc_queue_get_item(&metadata_hub_queue, &pack);
pthread_cleanup_push(metadata_pack_cleanup_function, (void *)&pack);
if (pack.carrier) {
debug(4, " hub: type %x, code %x, length %u, message %d.", pack.type,
pack.code, pack.length, pack.carrier->index_number);
} else {
debug(4, " hub: type %x, code %x, length %u.", pack.type, pack.code,
pack.length);
}
metadata_hub_process_metadata(pack.type, pack.code, pack.data, pack.length);
debug(4, " hub: done.");
pthread_cleanup_pop(1);
}
pthread_cleanup_pop(1); // will never happen
pthread_exit(NULL);
}
void metadata_hub_queue_init() {
// create a pc_queue for the metadata hub
pc_queue_init(&metadata_hub_queue, (char *)&metadata_hub_queue_items, sizeof(metadata_package),
metadata_hub_queue_size, "hub");
if (named_pthread_create(&metadata_hub_thread, NULL, metadata_hub_thread_function, NULL,
"metadata hub") != 0)
debug(1, "Failed to create metadata hub thread!");
}
void metadata_hub_queue_stop() {
// debug(2, "metadata stop hub thread.");
pthread_cancel(metadata_hub_thread);
pthread_join(metadata_hub_thread, NULL);
pc_queue_delete(&metadata_hub_queue);
// debug(2, "metadata stop hub done.");
}
int send_metadata_to_hub_queue(const uint32_t type, const uint32_t code,
const char *data, const uint32_t length, rtsp_message *carrier,
int block) {
return send_metadata_to_queue(&metadata_hub_queue, type, code, data, length, carrier, block);
}
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