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media_index.c: Refactored so it doesn't cache the index

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Testing revealed that the cache added no benefit but that it could
consume excessive memory.

Two new index related functions were created:
ast_sounds_get_index_for_file() and ast_media_index_update_for_file()
which restrict index updating to specific sound files.

The original ast_sounds_get_index() and ast_media_index_update()
calls are still available but since they no longer cache the results
internally, developers should re-use an index they may already have
instead of calling ast_sounds_get_index() repeatedly.  If information
for only a single file is needed, ast_sounds_get_index_for_file()
should be called instead of ast_sounds_get_index().

The media_index directory scan code was elimininated in favor of
using the existing ast_file_read_dirs() function.

Since there's no more cache, ast_sounds_index_init now only
registers the sounds cli commands instead of generating the
initial index and subscribing to stasis format register/unregister
messages.

"sounds" is no longer a valid target for the "module reload"
command.

Both the sounds cli commands and the sounds ari resources were
refactored to only call ast_sounds_get_index() once per invocation
and to use ast_sounds_get_index_for_file() when a specific sound
file is requested.

Change-Id: I1cef327ba1b0648d85d218b70ce469ad07f4aa8d
16.2
George Joseph 6 years ago
parent e994dff064
commit 603143bd5a
6 changed files with 276 additions and 206 deletions
Show Stats Download Patch File Download Diff File

13
CHANGES
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@ -17,6 +17,19 @@ res_pjsip
* Added "send_contact_status_on_update_registration" global configuration option
to enable sending AMI ContactStatus event when a device refreshes its registration.
Core
------------------
* Reworked the media indexer so it doesn't cache the index. Testing revealed
that the cache added no benefit but that it could consume excessive memory.
Two new index related functions were created: ast_sounds_get_index_for_file()
and ast_media_index_update_for_file() which restrict index updating to
specific sound files. The original ast_sounds_get_index() and
ast_media_index_update() calls are still available but since they no longer
cache the results internally, developers should re-use an index they may
already have instead of calling ast_sounds_get_index() repeatedly. If
information for only a single file is needed, ast_sounds_get_index_for_file()
should be called instead of ast_sounds_get_index().
Features
------------------
* Before Asterisk 12, when using the automon or automixmon features defined

20
include/asterisk/media_index.h
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@ -101,6 +101,26 @@ struct ao2_container *ast_media_get_media(struct ast_media_index *index);
*/
int ast_media_index_update(struct ast_media_index *index,
const char *variant);
/*!
* \brief Update a media index for a specific sound file
*
* \since 13.25.0
* \since 16.2.0
*
* \param index Media index in which to query information
* \param variant Media variant for which to get the description
* \param filename Sound file name without extension
*
* \note If filename is NULL, this function will act as
* \ref ast_media_index_update and add all sound files to the index.
*
* \retval non-zero on error
* \return zero on success
*/
int ast_media_index_update_for_file(struct ast_media_index *index,
const char *variant, const char *filename);
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

13
include/asterisk/sounds_index.h
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@ -40,6 +40,19 @@ struct ast_media_index;
*/
struct ast_media_index *ast_sounds_get_index(void);
/*!
* \brief Get the index for a specific sound file
* \since 13.25.0
* \since 16.2.0
*
* \param filename Sound file name without extension
*
* \retval sounds index (must be ao2_cleanup()'ed)
* \retval NULL on failure
*/
struct ast_media_index *ast_sounds_get_index_for_file(const char *filename);
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

229
main/media_index.c
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@ -380,7 +380,8 @@ static int process_media_file(struct ast_media_index *index, const char *variant
static int process_description_file(struct ast_media_index *index,
const char *subdir,
const char *variant_str,
const char *filename)
const char *filename,
const char *match_filename)
{
RAII_VAR(struct ast_str *, description_file_path, ast_str_create(64), ast_free);
RAII_VAR(struct ast_str *, cumulative_description, ast_str_create(64), ast_free);
@ -450,16 +451,21 @@ static int process_description_file(struct ast_media_index *index,
if (file_id_persist && !ast_strlen_zero(ast_str_buffer(cumulative_description))) {
struct media_variant *variant;
variant = alloc_variant(index, file_id_persist, variant_str);
if (!variant) {
res = -1;
break;
/*
* If we were only searching for a specific sound filename
* don't include others.
*/
if (ast_strlen_zero(match_filename) || strcmp(match_filename, file_id_persist) == 0) {
variant = alloc_variant(index, file_id_persist, variant_str);
if (!variant) {
res = -1;
break;
}
ast_string_field_set(variant, description, ast_str_buffer(cumulative_description));
ao2_ref(variant, -1);
}
ast_string_field_set(variant, description, ast_str_buffer(cumulative_description));
ast_str_reset(cumulative_description);
ao2_ref(variant, -1);
}
ast_free(file_id_persist);
@ -473,12 +479,18 @@ static int process_description_file(struct ast_media_index *index,
if (file_id_persist && !ast_strlen_zero(ast_str_buffer(cumulative_description))) {
struct media_variant *variant;
variant = alloc_variant(index, file_id_persist, variant_str);
if (variant) {
ast_string_field_set(variant, description, ast_str_buffer(cumulative_description));
ao2_ref(variant, -1);
} else {
res = -1;
/*
* If we were only searching for a specific sound filename
* don't include others.
*/
if (ast_strlen_zero(match_filename) || strcmp(match_filename, file_id_persist) == 0) {
variant = alloc_variant(index, file_id_persist, variant_str);
if (variant) {
ast_string_field_set(variant, description, ast_str_buffer(cumulative_description));
ao2_ref(variant, -1);
} else {
res = -1;
}
}
}
@ -487,110 +499,121 @@ static int process_description_file(struct ast_media_index *index,
return res;
}
/*! \brief process an individual file listing */
static int process_file(struct ast_media_index *index, const char *variant_str, const char *subdir, const char *filename)
struct read_dirs_data {
const char *search_filename;
size_t search_filename_len;
const char *search_variant;
struct ast_media_index *index;
size_t dirname_len;
};
static int read_dirs_cb(const char *dir_name, const char *filename, void *obj)
{
RAII_VAR(char *, filename_stripped, ast_strdup(filename), ast_free);
struct read_dirs_data *data = obj;
char *ext;
if (!filename_stripped) {
return -1;
}
ext = strrchr(filename_stripped, '.');
size_t match_len;
char *match;
size_t match_base_len;
char *subdirs = (char *)dir_name + data->dirname_len;
/*
* Example:
* From the filesystem:
* index's base_dir = "/var/lib/asterisk/sounds"
* search_variant = "en"
* search directory base = "/var/lib/asterisk/sounds/en"
* dirname_len = 27
* current dir_name = "/var/lib/asterisk/sounds/en/digits"
* subdirs = "/digits"
* filename = "1.ulaw"
*
* From the search criteria:
* search_filename = "digits/1"
* search_filename_len = 8
*/
if (*subdirs == '/') {
subdirs++;
}
/* subdirs = "digits" */
match_len = strlen(subdirs) + strlen(filename) + 2;
match = ast_alloca(match_len);
snprintf(match, match_len, "%s%s%s", subdirs,
ast_strlen_zero(subdirs) ? "" : "/", filename);
/* match = discovered filename relative to language = "digits/1.ulaw" */
ext = strrchr(match, '.');
if (!ext) {
/* file has no extension */
return 0;
}
*ext++ = '\0';
if (!strcmp(ext, "txt")) {
if (process_description_file(index, subdir, variant_str, filename)) {
return -1;
/* ext = ".ulaw" */
if (data->search_filename_len > 0) {
match_base_len = ext - match;
/*
* match_base_len = length of "digits/1" = 8 which
* happens to match the length of search_filename.
* However if the discovered filename was 11.ulaw
* it would be length of "digits/11" = 9.
* We need to use the larger during the compare to
* make sure we don't match just search_filename
* as a substring of the discovered filename.
*/
if (data->search_filename_len > match_base_len) {
match_base_len = data->search_filename_len;
}
} else {
if (process_media_file(index, variant_str, subdir, filename_stripped, ext)) {
}
/* We always process txt files because they should contain description. */
if (strcmp(ext, ".txt") == 0) {
if (process_description_file(data->index, NULL, data->search_variant,
match, data->search_filename)) {
return -1;
}
} else if (data->search_filename_len == 0
|| strncmp(data->search_filename, match, match_base_len ) == 0) {
*ext = '\0';
ext++;
process_media_file(data->index, data->search_variant, NULL, match, ext);
}
return 0;
}
/*! \brief internal function for updating the index, recursive */
static int media_index_update(struct ast_media_index *index,
const char *variant,
const char *subdir)
int ast_media_index_update_for_file(struct ast_media_index *index,
const char *variant, const char *filename)
{
struct dirent* dent;
DIR* srcdir;
RAII_VAR(struct ast_str *, index_dir, ast_str_create(64), ast_free);
RAII_VAR(struct ast_str *, statfile, ast_str_create(64), ast_free);
int res = 0;
if (!index_dir) {
return 0;
}
ast_str_set(&index_dir, 0, "%s", index->base_dir);
if (!ast_strlen_zero(variant)) {
ast_str_append(&index_dir, 0, "/%s", variant);
}
if (!ast_strlen_zero(subdir)) {
ast_str_append(&index_dir, 0, "/%s", subdir);
}
srcdir = opendir(ast_str_buffer(index_dir));
if (srcdir == NULL) {
ast_log(LOG_ERROR, "Failed to open %s: %s\n", ast_str_buffer(index_dir), strerror(errno));
return -1;
}
while((dent = readdir(srcdir)) != NULL) {
struct stat st;
if(!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) {
continue;
}
ast_str_reset(statfile);
ast_str_set(&statfile, 0, "%s/%s", ast_str_buffer(index_dir), dent->d_name);
if (stat(ast_str_buffer(statfile), &st) < 0) {
ast_log(LOG_WARNING, "Failed to stat %s: %s\n", ast_str_buffer(statfile), strerror(errno));
continue;
}
if (S_ISDIR(st.st_mode)) {
if (ast_strlen_zero(subdir)) {
res = media_index_update(index, variant, dent->d_name);
} else {
RAII_VAR(struct ast_str *, new_subdir, ast_str_create(64), ast_free);
ast_str_set(&new_subdir, 0, "%s/%s", subdir, dent->d_name);
res = media_index_update(index, variant, ast_str_buffer(new_subdir));
}
if (res) {
break;
}
continue;
}
if (!S_ISREG(st.st_mode)) {
continue;
}
if (process_file(index, variant, subdir, dent->d_name)) {
res = -1;
break;
}
}
closedir(srcdir);
return res;
struct timeval start;
struct timeval end;
int64_t elapsed;
int rc;
size_t dirname_len = strlen(index->base_dir) + strlen(S_OR(variant, "")) + 1;
struct read_dirs_data data = {
.search_filename = S_OR(filename, ""),
.search_filename_len = strlen(S_OR(filename, "")),
.search_variant = S_OR(variant, ""),
.index = index,
.dirname_len = dirname_len,
};
char *search_dir = ast_alloca(dirname_len + 1);
sprintf(search_dir, "%s%s%s", index->base_dir, ast_strlen_zero(variant) ? "" : "/",
data.search_variant);
gettimeofday(&start, NULL);
rc = ast_file_read_dirs(search_dir, read_dirs_cb, &data, -1);
gettimeofday(&end, NULL);
elapsed = ast_tvdiff_us(end, start);
ast_debug(1, "Media for language '%s' indexed in %8.6f seconds\n", data.search_variant, elapsed / 1E6);
return rc;
}
int ast_media_index_update(struct ast_media_index *index,
const char *variant)
int ast_media_index_update(struct ast_media_index *index, const char *variant)
{
return media_index_update(index, variant, NULL);
return ast_media_index_update_for_file(index, variant, NULL);
}

179
main/sounds.c
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@ -45,10 +45,6 @@
/*! \brief The number of buckets to be used for storing language-keyed objects */
#define LANGUAGE_BUCKETS 7
static struct ast_media_index *sounds_index;
static struct stasis_message_router *sounds_system_router;
/*! \brief Get the languages in which sound files are available */
static struct ao2_container *get_languages(void)
{
@ -97,55 +93,6 @@ static struct ao2_container *get_languages(void)
return lang_dirs;
}
/*! \brief Callback to process an individual language directory or subdirectory */
static int update_index_cb(void *obj, void *arg, int flags)
{
char *lang = obj;
struct ast_media_index *index = arg;
if (ast_media_index_update(index, lang)) {
return CMP_MATCH;
}
return 0;
}
AST_MUTEX_DEFINE_STATIC(reload_lock);
static int reload_module(void)
{
RAII_VAR(struct ast_str *, sounds_dir, NULL, ast_free);
RAII_VAR(struct ao2_container *, languages, NULL, ao2_cleanup);
RAII_VAR(char *, failed_index, NULL, ao2_cleanup);
RAII_VAR(struct ast_media_index *, new_index, NULL, ao2_cleanup);
struct ast_media_index *old_index;
SCOPED_MUTEX(lock, &reload_lock);
old_index = sounds_index;
languages = get_languages();
sounds_dir = ast_str_create(64);
if (!languages || !sounds_dir) {
return -1;
}
ast_str_set(&sounds_dir, 0, "%s/sounds", ast_config_AST_DATA_DIR);
new_index = ast_media_index_create(ast_str_buffer(sounds_dir));
if (!new_index) {
return -1;
}
failed_index = ao2_callback(languages, 0, update_index_cb, new_index);
if (failed_index) {
return -1;
}
ao2_ref(new_index, +1);
sounds_index = new_index;
ao2_cleanup(old_index);
return 0;
}
static int show_sounds_cb(void *obj, void *arg, int flags)
{
char *name = obj;
@ -154,13 +101,13 @@ static int show_sounds_cb(void *obj, void *arg, int flags)
return 0;
}
static int show_sound_info_cb(void *obj, void *arg, int flags)
static int show_sound_info_cb(void *obj, void *arg, void *data, int flags)
{
char *language = obj;
struct ast_cli_args *a = arg;
struct ast_format *format;
int formats_shown = 0;
RAII_VAR(struct ast_media_index *, local_index, ast_sounds_get_index(), ao2_cleanup);
struct ast_media_index *local_index = data;
struct ast_format_cap *cap;
const char *description = ast_media_get_description(local_index, a->argv[3], language);
@ -203,13 +150,23 @@ static char *handle_cli_sounds_show(struct ast_cli_entry *e, int cmd, struct ast
}
if (a->argc == 3) {
RAII_VAR(struct ao2_container *, sound_files, ast_media_get_media(sounds_index), ao2_cleanup);
struct ast_media_index *sounds_index = ast_sounds_get_index();
struct ao2_container *sound_files;
if (!sounds_index) {
return CLI_FAILURE;
}
sound_files = ast_media_get_media(sounds_index);
ao2_ref(sounds_index, -1);
if (!sound_files) {
return CLI_FAILURE;
}
ast_cli(a->fd, "Available audio files:\n");
ao2_callback(sound_files, OBJ_MULTIPLE | OBJ_NODATA, show_sounds_cb, a);
ao2_ref(sound_files, -1);
return CLI_SUCCESS;
}
@ -222,6 +179,7 @@ static char *handle_cli_sound_show(struct ast_cli_entry *e, int cmd, struct ast_
int length;
struct ao2_iterator it_sounds;
char *filename;
struct ast_media_index *sounds_index;
struct ao2_container *sound_files;
switch (cmd) {
@ -236,7 +194,13 @@ static char *handle_cli_sound_show(struct ast_cli_entry *e, int cmd, struct ast_
return NULL;
}
sounds_index = ast_sounds_get_index();
if (!sounds_index) {
return NULL;
}
sound_files = ast_media_get_media(sounds_index);
ao2_ref(sounds_index, -1);
if (!sound_files) {
return NULL;
}
@ -259,14 +223,27 @@ static char *handle_cli_sound_show(struct ast_cli_entry *e, int cmd, struct ast_
}
if (a->argc == 4) {
RAII_VAR(struct ao2_container *, variants, ast_media_get_variants(sounds_index, a->argv[3]), ao2_cleanup);
struct ao2_container *variants;
sounds_index = ast_sounds_get_index_for_file(a->argv[3]);
if (!sounds_index) {
return NULL;
}
variants = ast_media_get_variants(sounds_index, a->argv[3]);
if (!variants || !ao2_container_count(variants)) {
ao2_ref(sounds_index, -1);
ao2_cleanup(variants);
ast_cli(a->fd, "ERROR: File %s not found in index\n", a->argv[3]);
return CLI_FAILURE;
}
ast_cli(a->fd, "Indexed Information for %s:\n", a->argv[3]);
ao2_callback(variants, OBJ_MULTIPLE | OBJ_NODATA, show_sound_info_cb, a);
ao2_callback_data(variants, OBJ_MULTIPLE | OBJ_NODATA, show_sound_info_cb, a, sounds_index);
ao2_ref(sounds_index, -1);
ao2_ref(variants, -1);
return CLI_SUCCESS;
}
@ -281,67 +258,81 @@ static struct ast_cli_entry cli_sounds[] = {
static int unload_module(void)
{
stasis_message_router_unsubscribe_and_join(sounds_system_router);
sounds_system_router = NULL;
ast_cli_unregister_multiple(cli_sounds, ARRAY_LEN(cli_sounds));
ao2_cleanup(sounds_index);
sounds_index = NULL;
return 0;
}
static void format_update_cb(void *data, struct stasis_subscription *sub,
struct stasis_message *message)
static int load_module(void)
{
/* Reindexing during shutdown is pointless. */
if (!ast_shutting_down()) {
reload_module();
int res;
res = ast_cli_register_multiple(cli_sounds, ARRAY_LEN(cli_sounds));
if (res) {
return AST_MODULE_LOAD_DECLINE;
}
return AST_MODULE_LOAD_SUCCESS;
}
static int load_module(void)
/*! \brief Callback to process an individual language directory or subdirectory */
static int update_index_cb(void *obj, void *arg, void *data, int flags)
{
int res = 0;
if (reload_module()) {
return AST_MODULE_LOAD_FAILURE;
char *lang = obj;
char *filename = data;
struct ast_media_index *index = arg;
if (ast_media_index_update_for_file(index, lang, filename)) {
return CMP_MATCH;
}
res |= ast_cli_register_multiple(cli_sounds, ARRAY_LEN(cli_sounds));
sounds_system_router = stasis_message_router_create(ast_system_topic());
if (!sounds_system_router) {
return AST_MODULE_LOAD_FAILURE;
return 0;
}
struct ast_media_index *ast_sounds_get_index(void)
{
return ast_sounds_get_index_for_file(NULL);
}
struct ast_media_index *ast_sounds_get_index_for_file(const char *filename)
{
struct ast_str *sounds_dir = ast_str_create(64);
struct ao2_container *languages;
char *failed_index;
struct ast_media_index *new_index;
if (!sounds_dir) {
return NULL;
}
if (ast_format_register_type()) {
res |= stasis_message_router_add(
sounds_system_router,
ast_format_register_type(),
format_update_cb,
NULL);
ast_str_set(&sounds_dir, 0, "%s/sounds", ast_config_AST_DATA_DIR);
new_index = ast_media_index_create(ast_str_buffer(sounds_dir));
ast_free(sounds_dir);
if (!new_index) {
return NULL;
}
if (ast_format_unregister_type()) {
res |= stasis_message_router_add(
sounds_system_router,
ast_format_unregister_type(),
format_update_cb,
NULL);
languages = get_languages();
if (!languages) {
ao2_ref(new_index, -1);
return NULL;
}
return res ? AST_MODULE_LOAD_FAILURE : AST_MODULE_LOAD_SUCCESS;
}
failed_index = ao2_callback_data(languages, 0, update_index_cb, new_index, (void *)filename);
ao2_ref(languages, -1);
if (failed_index) {
ao2_ref(failed_index, -1);
ao2_ref(new_index, -1);
new_index = NULL;
}
struct ast_media_index *ast_sounds_get_index(void)
{
return ao2_bump(sounds_index);
return new_index;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER, "Sounds Index",
.support_level = AST_MODULE_SUPPORT_CORE,
.load = load_module,
.unload = unload_module,
/* This reload doesn't use config so this module doesn't require "extconfig". */
.reload = reload_module,
/* Load after the format modules to reduce processing during startup. */
.load_pri = AST_MODPRI_APP_DEPEND + 1,
);

28
res/ari/resource_sounds.c
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@ -40,13 +40,13 @@ struct lang_format_info {
};
/*! \brief Add format/lang pairs to the array embedded in the sound object */
static int add_format_information_cb(void *obj, void *arg, int flags)
static int add_format_information_cb(void *obj, void *arg, void *data, int flags)
{
char *language = obj;
struct lang_format_info *args = arg;
int idx;
RAII_VAR(struct ast_format_cap *, cap, NULL, ao2_cleanup);
RAII_VAR(struct ast_media_index *, sounds_index, ast_sounds_get_index(), ao2_cleanup);
struct ast_media_index *sounds_index = data;
if (!sounds_index) {
return CMP_STOP;
@ -95,14 +95,13 @@ static int filter_langs_cb(void *obj, void *arg, int flags)
/*! \brief Generate a Sound structure as documented in sounds.json for the specified filename */
static struct ast_json *create_sound_blob(const char *filename,
struct ast_ari_sounds_list_args *args)
struct ast_ari_sounds_list_args *args, struct ast_media_index *sounds_index)
{
RAII_VAR(struct ast_json *, sound, NULL, ast_json_unref);
RAII_VAR(struct ao2_container *, languages, NULL, ao2_cleanup);
const char *description;
struct ast_json *format_lang_list;
struct lang_format_info info;
RAII_VAR(struct ast_media_index *, sounds_index, ast_sounds_get_index(), ao2_cleanup);
if (!sounds_index) {
return NULL;
@ -148,7 +147,7 @@ static struct ast_json *create_sound_blob(const char *filename,
if (args) {
info.format_filter = args->format;
}
ao2_callback(languages, OBJ_NODATA, add_format_information_cb, &info);
ao2_callback_data(languages, OBJ_NODATA, add_format_information_cb, &info, sounds_index);
/* no format/lang pairs for this sound so nothing to return */
if (!ast_json_array_size(format_lang_list)) {
@ -158,13 +157,18 @@ static struct ast_json *create_sound_blob(const char *filename,
return ast_json_ref(sound);
}
struct sounds_cb_data {
struct ast_ari_sounds_list_args *args;
struct ast_media_index *index;
};
/*! \brief Generate a Sound structure and append it to the output blob */
static int append_sound_cb(void *obj, void *arg, void *data, int flags)
{
struct ast_json *sounds_array = arg;
char *filename = obj;
struct ast_ari_sounds_list_args *args = data;
struct ast_json *sound_blob = create_sound_blob(filename, args);
struct sounds_cb_data *cb_data = data;
struct ast_json *sound_blob = create_sound_blob(filename, cb_data->args, cb_data->index);
if (!sound_blob) {
return 0;
}
@ -180,6 +184,10 @@ void ast_ari_sounds_list(struct ast_variable *headers,
RAII_VAR(struct ao2_container *, sound_files, NULL, ao2_cleanup);
struct ast_json *sounds_blob;
RAII_VAR(struct ast_media_index *, sounds_index, ast_sounds_get_index(), ao2_cleanup);
struct sounds_cb_data cb_data = {
.args = args,
.index = sounds_index,
};
if (!sounds_index) {
ast_ari_response_error(response, 500, "Internal Error", "Sounds index not available");
@ -198,7 +206,7 @@ void ast_ari_sounds_list(struct ast_variable *headers,
return;
}
ao2_callback_data(sound_files, OBJ_NODATA, append_sound_cb, sounds_blob, args);
ao2_callback_data(sound_files, OBJ_NODATA, append_sound_cb, sounds_blob, &cb_data);
if (!ast_json_array_size(sounds_blob)) {
ast_ari_response_error(response, 404, "Not Found", "No sounds found that matched the query");
@ -214,8 +222,10 @@ void ast_ari_sounds_get(struct ast_variable *headers,
struct ast_ari_response *response)
{
struct ast_json *sound_blob;
struct ast_media_index *sounds_index = ast_sounds_get_index_for_file(args->sound_id);
sound_blob = create_sound_blob(args->sound_id, NULL);
sound_blob = create_sound_blob(args->sound_id, NULL, sounds_index);
ao2_cleanup(sounds_index);
if (!sound_blob) {
ast_ari_response_error(response, 404, "Not Found", "Sound not found");
return;

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