gstreamer/ges/ges-asset.c

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/* GStreamer Editing Services
*
* Copyright (C) 2012-2015 Thibault Saunier <thibault.saunier@collabora.com>
* Copyright (C) 2012 Volodymyr Rudyi <vladimir.rudoy@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION: gesasset
* @title: GESAsset
* @short_description: Represents usable resources inside the GStreamer Editing Services
*
* The Assets in the GStreamer Editing Services represent the resources
* that can be used. You can create assets for any type that implements the #GESExtractable
* interface, for example #GESClips, #GESFormatter, and #GESTrackElement do implement it.
* This means that assets will represent for example a #GESUriClips, #GESBaseEffect etc,
* and then you can extract objects of those types with the appropriate parameters from the asset
* using the #ges_asset_extract method:
*
* |[
* GESAsset *effect_asset;
* GESEffect *effect;
*
* // You create an asset for an effect
* effect_asset = ges_asset_request (GES_TYPE_EFFECT, "agingtv", NULL);
*
* // And now you can extract an instance of GESEffect from that asset
* effect = GES_EFFECT (ges_asset_extract (effect_asset));
*
* ]|
*
* In that example, the advantages of having a #GESAsset are that you can know what effects
* you are working with and let your user know about the avalaible ones, you can add metadata
* to the #GESAsset through the #GESMetaContainer interface and you have a model for your
* custom effects. Note that #GESAsset management is making easier thanks to the #GESProject class.
*
* Each asset is represented by a pair of @extractable_type and @id (string). Actually the @extractable_type
* is the type that implements the #GESExtractable interface, that means that for example for a #GESUriClip,
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* the type that implements the #GESExtractable interface is #GESClip.
* The identifier represents different things depending on the @extractable_type and you should check
* the documentation of each type to know what the ID of #GESAsset actually represents for that type. By default,
* we only have one #GESAsset per type, and the @id is the name of the type, but this behaviour is overriden
* to be more useful. For example, for GESTransitionClips, the ID is the vtype of the transition
* you will extract from it (ie crossfade, box-wipe-rc etc..) For #GESEffect the ID is the
* @bin-description property of the extracted objects (ie the gst-launch style description of the bin that
* will be used).
*
* Each and every #GESAsset is cached into GES, and you can query those with the #ges_list_assets function.
* Also the system will automatically register #GESAssets for #GESFormatters and #GESTransitionClips
* and standard effects (actually not implemented yet) and you can simply query those calling:
* |[
* GList *formatter_assets, *tmp;
*
* // List all the transitions
* formatter_assets = ges_list_assets (GES_TYPE_FORMATTER);
*
* // Print some infos about the formatter GESAsset
* for (tmp = formatter_assets; tmp; tmp = tmp->next) {
* g_print ("Name of the formatter: %s, file extension it produces: %s",
* ges_meta_container_get_string (GES_META_CONTAINER (tmp->data), GES_META_FORMATTER_NAME),
* ges_meta_container_get_string (GES_META_CONTAINER (tmp->data), GES_META_FORMATTER_EXTENSION));
* }
*
* g_list_free (transition_assets);
*
* ]|
*
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* You can request the creation of #GESAssets using either ges_asset_request() or
* ges_asset_request_async(). All the #GESAssets are cached and thus any asset that has already
* been created can be requested again without overhead.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges.h"
#include "ges-internal.h"
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <gst/gst.h>
GST_DEBUG_CATEGORY_STATIC (ges_asset_debug);
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT ges_asset_debug
enum
{
PROP_0,
PROP_TYPE,
PROP_ID,
PROP_PROXY,
PROP_PROXY_TARGET,
PROP_LAST
};
typedef enum
{
ASSET_NOT_INITIALIZED,
ASSET_INITIALIZING, ASSET_INITIALIZED_WITH_ERROR,
ASSET_PROXIED,
ASSET_NEEDS_RELOAD,
ASSET_INITIALIZED
} GESAssetState;
static GParamSpec *_properties[PROP_LAST];
struct _GESAssetPrivate
{
gchar *id;
GESAssetState state;
GType extractable_type;
/* When an asset is proxied, instantiating it will
* return the asset it points to */
char *proxied_asset_id;
GList *proxies;
GESAsset *proxy_target;
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/* The error that occurred when an asset has been initialized with error */
GError *error;
};
/* Internal structure to help avoid full loading
* of one asset several times
*/
typedef struct
{
GList *results;
GESAsset *asset;
} GESAssetCacheEntry;
/* Also protect all the entries in the cache */
G_LOCK_DEFINE_STATIC (asset_cache_lock);
/* We are mapping entries by types and ID, such as:
*
* {
* first_extractable_type_name1 :
* {
* "some ID": GESAssetCacheEntry,
* "some other ID": GESAssetCacheEntry 2
* },
* second_extractable_type_name :
* {
* "some ID": GESAssetCacheEntry,
* "some other ID": GESAssetCacheEntry 2
* }
* }
*
* (The first extractable type is the type of the class that implemented
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* the GESExtractable interface ie: GESClip, GESTimeline,
* GESFomatter, etc... but not subclasses)
*
* This is in order to be able to have 2 Asset with the same ID but
* different extractable types.
**/
static GHashTable *type_entries_table = NULL;
#define LOCK_CACHE (G_LOCK (asset_cache_lock))
#define UNLOCK_CACHE (G_UNLOCK (asset_cache_lock))
static gchar *
_check_and_update_parameters (GType * extractable_type, const gchar * id,
GError ** error)
{
gchar *real_id;
GType old_type = *extractable_type;
*extractable_type =
ges_extractable_get_real_extractable_type_for_id (*extractable_type, id);
if (*extractable_type == G_TYPE_NONE) {
GST_WARNING ("No way to create a Asset for ID: %s, type: %s", id,
g_type_name (old_type));
if (error && *error == NULL)
g_set_error (error, GES_ERROR, GES_ERROR_ASSET_WRONG_ID,
"Wrong ID, can not find any extractable_type");
return NULL;
}
real_id = ges_extractable_type_check_id (*extractable_type, id, error);
if (real_id == NULL) {
GST_WARNING ("Wrong ID %s, can not create asset", id);
g_free (real_id);
if (error && *error == NULL)
g_set_error (error, GES_ERROR, GES_ERROR_ASSET_WRONG_ID, "Wrong ID");
return NULL;
}
return real_id;
}
static gboolean
start_loading (GESAsset * asset)
{
ges_asset_cache_put (gst_object_ref (asset), NULL);
return ges_asset_cache_set_loaded (asset->priv->extractable_type,
asset->priv->id, NULL);
}
static gboolean
initable_init (GInitable * initable, GCancellable * cancellable,
GError ** error)
{
g_clear_error (error);
return start_loading (GES_ASSET (initable));
}
static void
async_initable_init_async (GAsyncInitable * initable, gint io_priority,
GCancellable * cancellable, GAsyncReadyCallback callback,
gpointer user_data)
{
GTask *task;
GError *error = NULL;
GESAsset *asset = GES_ASSET (initable);
task = g_task_new (asset, cancellable, callback, user_data);
ges_asset_cache_put (g_object_ref (asset), task);
switch (GES_ASSET_GET_CLASS (asset)->start_loading (asset, &error)) {
case GES_ASSET_LOADING_ERROR:
{
if (error == NULL)
g_set_error (&error, GES_ERROR, GES_ERROR_ASSET_LOADING,
"Could not start loading asset");
/* FIXME Define error code */
ges_asset_cache_set_loaded (asset->priv->extractable_type,
asset->priv->id, error);
g_error_free (error);
return;
}
case GES_ASSET_LOADING_OK:
{
ges_asset_cache_set_loaded (asset->priv->extractable_type,
asset->priv->id, error);
return;
}
case GES_ASSET_LOADING_ASYNC:
/* If Async.... let it go */
break;
}
}
static void
async_initable_iface_init (GAsyncInitableIface * async_initable_iface)
{
async_initable_iface->init_async = async_initable_init_async;
}
static void
initable_iface_init (GInitableIface * initable_iface)
{
initable_iface->init = initable_init;
}
G_DEFINE_TYPE_WITH_CODE (GESAsset, ges_asset, G_TYPE_OBJECT,
G_ADD_PRIVATE (GESAsset)
G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE, async_initable_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER, NULL));
/* GESAsset virtual methods default implementation */
static GESAssetLoadingReturn
ges_asset_start_loading_default (GESAsset * asset, GError ** error)
{
return GES_ASSET_LOADING_OK;
}
static GESExtractable *
ges_asset_extract_default (GESAsset * asset, GError ** error)
{
guint n_params;
GParameter *params;
GESAssetPrivate *priv = asset->priv;
GESExtractable *n_extractable;
params = ges_extractable_type_get_parameters_from_id (priv->extractable_type,
priv->id, &n_params);
#if GLIB_CHECK_VERSION(2, 53, 1)
{
gint i;
GValue *values;
const gchar **names;
values = g_malloc0 (sizeof (GValue) * n_params);
names = g_malloc0 (sizeof (gchar *) * n_params);
for (i = 0; i < n_params; i++) {
values[i] = params[i].value;
names[i] = params[i].name;
}
n_extractable =
GES_EXTRACTABLE (g_object_new_with_properties (priv->extractable_type,
n_params, names, values));
g_free (names);
g_free (values);
}
#else
n_extractable = g_object_newv (priv->extractable_type, n_params, params);
#endif
while (n_params--)
g_value_unset (&params[n_params].value);
g_free (params);
return n_extractable;
}
static gboolean
ges_asset_request_id_update_default (GESAsset * self, gchar ** proposed_new_id,
GError * error)
{
return FALSE;
}
/* GObject virtual methods implementation */
static void
ges_asset_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESAsset *asset = GES_ASSET (object);
switch (property_id) {
case PROP_TYPE:
g_value_set_gtype (value, asset->priv->extractable_type);
break;
case PROP_ID:
g_value_set_string (value, asset->priv->id);
break;
case PROP_PROXY:
g_value_set_object (value, ges_asset_get_proxy (asset));
break;
case PROP_PROXY_TARGET:
g_value_set_object (value, ges_asset_get_proxy_target (asset));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_asset_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESAsset *asset = GES_ASSET (object);
switch (property_id) {
case PROP_TYPE:
asset->priv->extractable_type = g_value_get_gtype (value);
ges_extractable_register_metas (asset->priv->extractable_type, asset);
break;
case PROP_ID:
asset->priv->id = g_value_dup_string (value);
break;
case PROP_PROXY:
ges_asset_set_proxy (asset, g_value_get_object (value));
break;
case PROP_PROXY_TARGET:
ges_asset_set_proxy (g_value_get_object (value), asset);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_asset_finalize (GObject * object)
{
GESAssetPrivate *priv = GES_ASSET (object)->priv;
GST_DEBUG_OBJECT (object, "finalizing");
if (priv->id)
g_free (priv->id);
if (priv->proxied_asset_id)
g_free (priv->proxied_asset_id);
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if (priv->error)
g_error_free (priv->error);
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if (priv->proxies)
g_list_free (priv->proxies);
G_OBJECT_CLASS (ges_asset_parent_class)->finalize (object);
}
void
ges_asset_class_init (GESAssetClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->get_property = ges_asset_get_property;
object_class->set_property = ges_asset_set_property;
object_class->finalize = ges_asset_finalize;
_properties[PROP_TYPE] =
g_param_spec_gtype ("extractable-type", "Extractable type",
"The type of the Object that can be extracted out of the asset",
G_TYPE_OBJECT, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
_properties[PROP_ID] =
g_param_spec_string ("id", "Identifier",
"The unic identifier of the asset", NULL,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE);
_properties[PROP_PROXY] =
g_param_spec_object ("proxy", "Proxy",
"The asset default proxy.", GES_TYPE_ASSET, G_PARAM_READWRITE);
_properties[PROP_PROXY_TARGET] =
g_param_spec_object ("proxy-target", "Proxy target",
"The target of a proxy asset.", GES_TYPE_ASSET, G_PARAM_READWRITE);
g_object_class_install_properties (object_class, PROP_LAST, _properties);
klass->start_loading = ges_asset_start_loading_default;
klass->extract = ges_asset_extract_default;
klass->request_id_update = ges_asset_request_id_update_default;
klass->inform_proxy = NULL;
GST_DEBUG_CATEGORY_INIT (ges_asset_debug, "ges-asset",
GST_DEBUG_FG_BLUE | GST_DEBUG_BOLD, "GES Asset");
}
void
ges_asset_init (GESAsset * self)
{
self->priv = ges_asset_get_instance_private (self);
self->priv->state = ASSET_INITIALIZING;
self->priv->proxied_asset_id = NULL;
}
/* Internal methods */
/* Find the type that implemented the GESExtractable interface */
static inline const gchar *
_extractable_type_name (GType type)
{
while (1) {
if (g_type_is_a (g_type_parent (type), GES_TYPE_EXTRACTABLE))
type = g_type_parent (type);
else
return g_type_name (type);
}
}
static inline GESAssetCacheEntry *
_lookup_entry (GType extractable_type, const gchar * id)
{
GHashTable *entries_table;
entries_table = g_hash_table_lookup (type_entries_table,
_extractable_type_name (extractable_type));
if (entries_table)
return g_hash_table_lookup (entries_table, id);
return NULL;
}
static void
_free_entries (gpointer entry)
{
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GESAssetCacheEntry *data = (GESAssetCacheEntry *) entry;
if (data->asset)
gst_object_unref (data->asset);
g_slice_free (GESAssetCacheEntry, entry);
}
static void
_gtask_return_error (GTask * task, GError * error)
{
g_task_return_error (task, g_error_copy (error));
}
static void
_gtask_return_true (GTask * task, gpointer udata)
{
g_task_return_boolean (task, TRUE);
}
/**
* ges_asset_cache_lookup:
*
* @id String identifier of asset
*
* Looks for asset with specified id in cache and it's completely loaded.
*
* Returns: (transfer none) (nullable): The #GESAsset found or %NULL
*/
GESAsset *
ges_asset_cache_lookup (GType extractable_type, const gchar * id)
{
GESAsset *asset = NULL;
GESAssetCacheEntry *entry = NULL;
g_return_val_if_fail (id, NULL);
LOCK_CACHE;
entry = _lookup_entry (extractable_type, id);
if (entry)
asset = entry->asset;
UNLOCK_CACHE;
return asset;
}
static void
ges_asset_cache_append_task (GType extractable_type,
const gchar * id, GTask * task)
{
GESAssetCacheEntry *entry = NULL;
LOCK_CACHE;
if ((entry = _lookup_entry (extractable_type, id)))
entry->results = g_list_append (entry->results, task);
UNLOCK_CACHE;
}
gboolean
ges_asset_cache_set_loaded (GType extractable_type, const gchar * id,
GError * error)
{
GESAsset *asset;
GESAssetCacheEntry *entry = NULL;
GList *results = NULL;
GFunc user_func = NULL;
gpointer user_data = NULL;
LOCK_CACHE;
if ((entry = _lookup_entry (extractable_type, id)) == NULL) {
UNLOCK_CACHE;
GST_ERROR ("Calling but type %s ID: %s not in cached, "
"something massively screwed", g_type_name (extractable_type), id);
return FALSE;
}
asset = entry->asset;
GST_DEBUG_OBJECT (entry->asset, ": (extractable type: %s) loaded, calling %i "
"callback (Error: %s)", g_type_name (asset->priv->extractable_type),
g_list_length (entry->results), error ? error->message : "");
results = entry->results;
entry->results = NULL;
if (error) {
asset->priv->state = ASSET_INITIALIZED_WITH_ERROR;
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if (asset->priv->error)
g_error_free (asset->priv->error);
asset->priv->error = g_error_copy (error);
/* In case of error we do not want to emit in idle as we need to recover
* if possible */
user_func = (GFunc) _gtask_return_error;
user_data = error;
GST_DEBUG_OBJECT (asset, "initialized with error");
} else {
asset->priv->state = ASSET_INITIALIZED;
user_func = (GFunc) _gtask_return_true;
GST_DEBUG_OBJECT (asset, "initialized");
}
UNLOCK_CACHE;
g_list_foreach (results, user_func, user_data);
g_list_free_full (results, g_object_unref);
return TRUE;
}
void
ges_asset_cache_put (GESAsset * asset, GTask * task)
{
GType extractable_type;
const gchar *asset_id;
GESAssetCacheEntry *entry;
/* Needing to work with the cache, taking the lock */
asset_id = ges_asset_get_id (asset);
extractable_type = asset->priv->extractable_type;
LOCK_CACHE;
if (!(entry = _lookup_entry (extractable_type, asset_id))) {
GHashTable *entries_table;
entries_table = g_hash_table_lookup (type_entries_table,
_extractable_type_name (extractable_type));
if (entries_table == NULL) {
entries_table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free,
_free_entries);
g_hash_table_insert (type_entries_table,
g_strdup (_extractable_type_name (extractable_type)), entries_table);
}
entry = g_slice_new0 (GESAssetCacheEntry);
entry->asset = asset;
if (task)
entry->results = g_list_prepend (entry->results, task);
g_hash_table_insert (entries_table, (gpointer) g_strdup (asset_id),
(gpointer) entry);
} else {
if (task) {
GST_DEBUG ("%s already in cache, adding result %p", asset_id, task);
entry->results = g_list_prepend (entry->results, task);
}
}
UNLOCK_CACHE;
}
void
ges_asset_cache_init (void)
{
type_entries_table = g_hash_table_new_full (g_str_hash, g_str_equal,
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g_free, (GDestroyNotify) g_hash_table_unref);
_init_formatter_assets ();
_init_standard_transition_assets ();
}
void
ges_asset_cache_deinit (void)
{
g_hash_table_destroy (type_entries_table);
type_entries_table = NULL;
}
gboolean
ges_asset_request_id_update (GESAsset * asset, gchar ** proposed_id,
GError * error)
{
g_return_val_if_fail (GES_IS_ASSET (asset), FALSE);
return GES_ASSET_GET_CLASS (asset)->request_id_update (asset, proposed_id,
error);
}
gboolean
ges_asset_try_proxy (GESAsset * asset, const gchar * new_id)
{
GESAssetClass *class;
g_return_val_if_fail (GES_IS_ASSET (asset), FALSE);
if (g_strcmp0 (asset->priv->id, new_id) == 0) {
GST_WARNING_OBJECT (asset, "Trying to proxy to itself (%s),"
" NOT possible", new_id);
return FALSE;
} else if (g_strcmp0 (asset->priv->proxied_asset_id, new_id) == 0) {
GST_WARNING_OBJECT (asset,
"Trying to proxy to same currently set proxy: %s -- %s",
asset->priv->proxied_asset_id, new_id);
return FALSE;
}
g_free (asset->priv->proxied_asset_id);
asset->priv->state = ASSET_PROXIED;
asset->priv->proxied_asset_id = g_strdup (new_id);
class = GES_ASSET_GET_CLASS (asset);
if (class->inform_proxy)
GES_ASSET_GET_CLASS (asset)->inform_proxy (asset, new_id);
GST_DEBUG_OBJECT (asset, "Trying to proxy to %s", new_id);
return TRUE;
}
static gboolean
_lookup_proxied_asset (const gchar * id, GESAssetCacheEntry * entry,
const gchar * asset_id)
{
return !g_strcmp0 (asset_id, entry->asset->priv->proxied_asset_id);
}
/**
* ges_asset_set_proxy:
* @asset: The #GESAsset to set proxy on
* @proxy: (allow-none): The #GESAsset that should be used as default proxy for @asset or
* %NULL if you want to use the currently set proxy. Note that an asset can proxy one and only
* one other asset.
*
* A proxying asset is an asset that can substitue the real @asset. For example if you
* have a full HD #GESUriClipAsset you might want to set a lower resolution (HD version
* of the same file) as proxy. Note that when an asset is proxied, calling
* #ges_asset_request will actually return the proxy asset.
*
* Returns: %TRUE if @proxy has been set on @asset, %FALSE otherwise.
*/
gboolean
ges_asset_set_proxy (GESAsset * asset, GESAsset * proxy)
{
g_return_val_if_fail (asset == NULL || GES_IS_ASSET (asset), FALSE);
g_return_val_if_fail (proxy == NULL || GES_IS_ASSET (proxy), FALSE);
g_return_val_if_fail (asset != proxy, FALSE);
if (!proxy) {
if (asset->priv->error) {
GST_ERROR_OBJECT (asset,
"Proxy was loaded with error (%s), it should not be 'unproxied'",
asset->priv->error->message);
return FALSE;
}
if (asset->priv->proxies) {
GESAsset *old_proxy = GES_ASSET (asset->priv->proxies->data);
old_proxy->priv->proxy_target = NULL;
g_object_notify_by_pspec (G_OBJECT (old_proxy),
_properties[PROP_PROXY_TARGET]);
}
GST_DEBUG_OBJECT (asset, "%s not proxied anymore", asset->priv->id);
asset->priv->state = ASSET_INITIALIZED;
g_object_notify_by_pspec (G_OBJECT (asset), _properties[PROP_PROXY]);
return TRUE;
}
if (asset == NULL) {
GHashTable *entries_table;
GESAssetCacheEntry *entry;
entries_table = g_hash_table_lookup (type_entries_table,
_extractable_type_name (proxy->priv->extractable_type));
entry = g_hash_table_find (entries_table, (GHRFunc) _lookup_proxied_asset,
(gpointer) ges_asset_get_id (proxy));
if (!entry) {
GST_DEBUG_OBJECT (asset, "Not proxying any asset %s", proxy->priv->id);
return FALSE;
}
asset = entry->asset;
while (asset->priv->proxies)
asset = asset->priv->proxies->data;
if (asset == proxy)
return FALSE;
GST_INFO_OBJECT (asset, "%s Making sure the proxy chain is fully set.",
ges_asset_get_id (entry->asset));
if (g_strcmp0 (asset->priv->proxied_asset_id, proxy->priv->id) ||
g_strcmp0 (asset->priv->id, proxy->priv->proxied_asset_id))
ges_asset_set_proxy (NULL, asset);
}
if (proxy->priv->proxy_target) {
GST_ERROR_OBJECT (asset,
"Trying to use %s as a proxy, but it is already proxying %s",
proxy->priv->id, proxy->priv->proxy_target->priv->id);
return FALSE;
}
if (g_list_find (proxy->priv->proxies, asset)) {
GST_ERROR_OBJECT (asset, "Trying to setup a circular proxying dependency!");
return FALSE;
}
if (g_list_find (asset->priv->proxies, proxy)) {
GST_INFO_OBJECT (asset,
"%" GST_PTR_FORMAT " already marked as proxy, moving to first", proxy);
GES_ASSET (asset->priv->proxies->data)->priv->proxy_target = NULL;
asset->priv->proxies = g_list_remove (asset->priv->proxies, proxy);
}
GST_INFO ("%s is now proxied by %s", asset->priv->id, proxy->priv->id);
asset->priv->proxies = g_list_prepend (asset->priv->proxies, proxy);
proxy->priv->proxy_target = asset;
g_object_notify_by_pspec (G_OBJECT (proxy), _properties[PROP_PROXY_TARGET]);
asset->priv->state = ASSET_PROXIED;
g_object_notify_by_pspec (G_OBJECT (asset), _properties[PROP_PROXY]);
return TRUE;
}
/**
* ges_asset_unproxy:
* @asset: The #GESAsset to stop proxying with @proxy
* @proxy: The #GESAsset to stop considering as a proxy for @asset
*
* Removes @proxy from the list of known proxies for @asset.
* If @proxy was the current proxy for @asset, stop using it.
*
* Returns: %TRUE if @proxy was a known proxy for @asset, %FALSE otherwise.
*/
gboolean
ges_asset_unproxy (GESAsset * asset, GESAsset * proxy)
{
g_return_val_if_fail (GES_IS_ASSET (asset), FALSE);
g_return_val_if_fail (GES_IS_ASSET (proxy), FALSE);
g_return_val_if_fail (asset != proxy, FALSE);
if (!g_list_find (asset->priv->proxies, proxy)) {
GST_INFO_OBJECT (asset, "%s is not a proxy.", proxy->priv->id);
return FALSE;
}
if (asset->priv->proxies->data == proxy)
ges_asset_set_proxy (asset, NULL);
asset->priv->proxies = g_list_remove (asset->priv->proxies, proxy);
return TRUE;
}
/**
* ges_asset_list_proxies:
* @asset: The #GESAsset to get proxies from
*
2015-12-26 08:43:11 +00:00
* Returns: (element-type GESAsset) (transfer none): The list of proxies @asset has. Note that the default asset to be
* used is always the first in that list.
*/
GList *
ges_asset_list_proxies (GESAsset * asset)
{
g_return_val_if_fail (GES_IS_ASSET (asset), NULL);
return asset->priv->proxies;
}
/**
* ges_asset_get_proxy:
* @asset: The #GESAsset to get currenlty used proxy
*
* Returns: (transfer none) (nullable): The proxy in use for @asset
*/
GESAsset *
ges_asset_get_proxy (GESAsset * asset)
{
g_return_val_if_fail (GES_IS_ASSET (asset), NULL);
if (asset->priv->state == ASSET_PROXIED && asset->priv->proxies) {
return asset->priv->proxies->data;
}
return NULL;
}
/**
* ges_asset_get_proxy_target:
* @proxy: The #GESAsset from which to get the the asset it proxies.
*
* Returns: (transfer none) (nullable): The #GESAsset that is proxied by @proxy
*/
GESAsset *
ges_asset_get_proxy_target (GESAsset * proxy)
{
g_return_val_if_fail (GES_IS_ASSET (proxy), NULL);
return proxy->priv->proxy_target;
}
/* Caution, this method should be used in rare cases (ie: for the project
* as we can change its ID from a useless one to a proper URI). In most
* cases you want to update the ID creating a proxy
*/
void
ges_asset_set_id (GESAsset * asset, const gchar * id)
{
GHashTable *entries;
gpointer orig_id = NULL;
GESAssetCacheEntry *entry = NULL;
GESAssetPrivate *priv = NULL;
g_return_if_fail (GES_IS_ASSET (asset));
priv = asset->priv;
if (priv->state != ASSET_INITIALIZED) {
GST_WARNING_OBJECT (asset, "Trying to rest ID on an object that is"
" not properly loaded");
return;
}
if (g_strcmp0 (id, priv->id) == 0) {
GST_DEBUG_OBJECT (asset, "ID is already %s", id);
return;
}
LOCK_CACHE;
entries = g_hash_table_lookup (type_entries_table,
_extractable_type_name (asset->priv->extractable_type));
g_return_if_fail (g_hash_table_lookup_extended (entries, priv->id, &orig_id,
(gpointer *) & entry));
g_hash_table_steal (entries, priv->id);
g_hash_table_insert (entries, g_strdup (id), entry);
GST_DEBUG_OBJECT (asset, "Changing id from %s to %s", priv->id, id);
g_free (priv->id);
g_free (orig_id);
priv->id = g_strdup (id);
UNLOCK_CACHE;
}
static GESAsset *
2019-03-28 16:08:01 +00:00
_ensure_asset_for_wrong_id (const gchar * wrong_id, GType extractable_type,
GError * error)
{
GESAsset *asset;
if ((asset = ges_asset_cache_lookup (extractable_type, wrong_id)))
return asset;
/* It is a dummy GESAsset, we just bruteforce its creation */
asset = g_object_new (GES_TYPE_ASSET, "id", wrong_id,
"extractable-type", extractable_type, NULL);
ges_asset_cache_put (asset, NULL);
ges_asset_cache_set_loaded (extractable_type, wrong_id, error);
return asset;
}
/**********************************
* *
* API implementation *
* *
**********************************/
/**
* ges_asset_get_extractable_type:
* @self: The #GESAsset
*
* Gets the type of object that can be extracted from @self
*
* Returns: the type of object that can be extracted from @self
*/
GType
ges_asset_get_extractable_type (GESAsset * self)
{
g_return_val_if_fail (GES_IS_ASSET (self), G_TYPE_INVALID);
return self->priv->extractable_type;
}
/**
* ges_asset_request:
* @extractable_type: The #GType of the object that can be extracted from the new asset.
* @id: (allow-none): The Identifier or %NULL
* @error: (allow-none): An error to be set in case something wrong happens or %NULL
*
* Create a #GESAsset in the most simple cases, you should look at the @extractable_type
* documentation to see if that constructor can be called for this particular type
*
* As it is recommanded not to instanciate assets for GESUriClip synchronously,
* it will not work with this method, but you can instead use the specific
* #ges_uri_clip_asset_request_sync method if you really want to.
*
* Returns: (transfer full) (allow-none): A reference to the wanted #GESAsset or %NULL
*/
GESAsset *
ges_asset_request (GType extractable_type, const gchar * id, GError ** error)
{
gchar *real_id;
GError *lerr = NULL;
GESAsset *asset = NULL;
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
g_return_val_if_fail (g_type_is_a (extractable_type, G_TYPE_OBJECT), NULL);
g_return_val_if_fail (g_type_is_a (extractable_type, GES_TYPE_EXTRACTABLE),
NULL);
real_id = _check_and_update_parameters (&extractable_type, id, &lerr);
if (real_id == NULL) {
/* We create an asset for that wrong ID so we have a reference that the
* user requested it */
2019-03-28 16:08:01 +00:00
_ensure_asset_for_wrong_id (id, extractable_type, lerr);
real_id = g_strdup (id);
}
if (lerr)
g_error_free (lerr);
asset = ges_asset_cache_lookup (extractable_type, real_id);
if (asset) {
while (TRUE) {
switch (asset->priv->state) {
case ASSET_INITIALIZED:
gst_object_ref (asset);
goto done;
case ASSET_INITIALIZING:
asset = NULL;
goto done;
case ASSET_PROXIED:
if (asset->priv->proxies == NULL) {
GST_ERROR ("Proxied against an asset we do not"
" have in cache, something massively screwed");
goto done;
}
asset = asset->priv->proxies->data;
while (ges_asset_get_proxy (asset))
asset = ges_asset_get_proxy (asset);
break;
case ASSET_NEEDS_RELOAD:
GST_DEBUG_OBJECT (asset, "Asset in cache and needs reload");
start_loading (asset);
goto done;
case ASSET_INITIALIZED_WITH_ERROR:
GST_WARNING_OBJECT (asset, "Initialized with error, not returning");
if (asset->priv->error && error)
*error = g_error_copy (asset->priv->error);
asset = NULL;
goto done;
default:
GST_WARNING ("Case %i not handle, returning", asset->priv->state);
goto done;
}
}
} else {
GObjectClass *klass;
GInitableIface *iface;
GType asset_type = ges_extractable_type_get_asset_type (extractable_type);
klass = g_type_class_ref (asset_type);
iface = g_type_interface_peek (klass, G_TYPE_INITABLE);
if (iface->init) {
asset = g_initable_new (asset_type,
NULL, NULL, "id", real_id, "extractable-type",
extractable_type, NULL);
} else {
GST_WARNING ("Tried to create an Asset for type %s but no ->init method",
g_type_name (extractable_type));
}
g_type_class_unref (klass);
}
done:
if (real_id)
g_free (real_id);
GST_DEBUG ("New asset created synchronously: %p", asset);
return asset;
}
/**
* ges_asset_request_async:
* @extractable_type: The #GType of the object that can be extracted from the
* new asset. The class must implement the #GESExtractable interface.
* @id: The Identifier of the asset we want to create. This identifier depends of the extractable,
* type you want. By default it is the name of the class itself (or %NULL), but for example for a
* GESEffect, it will be the pipeline description, for a GESUriClip it
* will be the name of the file, etc... You should refer to the documentation of the #GESExtractable
* type you want to create a #GESAsset for.
* @cancellable: (allow-none): optional %GCancellable object, %NULL to ignore.
* @callback: a #GAsyncReadyCallback to call when the initialization is finished,
* Note that the @source of the callback will be the #GESAsset, but you need to
* make sure that the asset is properly loaded using the #ges_asset_request_finish
* method. This asset can not be used as is.
* @user_data: The user data to pass when @callback is called
*
* The @callback will be called from a running #GMainLoop which is iterating a #GMainContext.
* Note that, users should ensure the #GMainContext, since this method will notify
* @callback from the thread which was associated with a thread default
* #GMainContext at calling ges_init().
* For example, if a user wants non-default #GMainContext to be associated
* with @callback, ges_init() must be called after g_main_context_push_thread_default ()
* with custom #GMainContext.
*
* Request a new #GESAsset asyncronously, @callback will be called when the materail is
* ready to be used or if an error occured.
*
* Example of request of a GESAsset async:
* |[
* // The request callback
* static void
* asset_loaded_cb (GESAsset * source, GAsyncResult * res, gpointer user_data)
* {
* GESAsset *asset;
* GError *error = NULL;
*
* asset = ges_asset_request_finish (res, &error);
* if (asset) {
* g_print ("The file: %s is usable as a FileSource",
* ges_asset_get_id (asset));
* } else {
* g_print ("The file: %s is *not* usable as a FileSource because: %s",
* ges_asset_get_id (source), error->message);
* }
*
* gst_object_unref (mfs);
* }
*
* // The request:
* ges_asset_request_async (GES_TYPE_URI_CLIP, some_uri, NULL,
* (GAsyncReadyCallback) asset_loaded_cb, user_data);
* ]|
*/
void
ges_asset_request_async (GType extractable_type,
const gchar * id, GCancellable * cancellable, GAsyncReadyCallback callback,
gpointer user_data)
{
gchar *real_id;
GESAsset *asset;
GError *error = NULL;
2019-03-28 16:05:45 +00:00
GTask *task = NULL;
g_return_if_fail (g_type_is_a (extractable_type, G_TYPE_OBJECT));
g_return_if_fail (g_type_is_a (extractable_type, GES_TYPE_EXTRACTABLE));
g_return_if_fail (callback);
GST_DEBUG ("Creating asset with extractable type %s and ID=%s",
g_type_name (extractable_type), id);
real_id = _check_and_update_parameters (&extractable_type, id, &error);
if (error) {
2019-03-28 16:08:01 +00:00
_ensure_asset_for_wrong_id (id, extractable_type, error);
real_id = g_strdup (id);
}
/* Check if we already have an asset for this ID */
asset = ges_asset_cache_lookup (extractable_type, real_id);
if (asset) {
2019-03-28 16:05:45 +00:00
task = g_task_new (asset, NULL, callback, user_data);
/* In the case of proxied asset, we will loop until we find the
* last asset of the chain of proxied asset */
while (TRUE) {
switch (asset->priv->state) {
case ASSET_INITIALIZED:
GST_DEBUG_OBJECT (asset, "Asset in cache and initialized, "
"using it");
/* Takes its own references to @asset */
g_task_return_boolean (task, TRUE);
goto done;
case ASSET_INITIALIZING:
GST_DEBUG_OBJECT (asset, "Asset in cache and but not "
"initialized, setting a new callback");
ges_asset_cache_append_task (extractable_type, real_id, task);
2019-03-28 16:05:45 +00:00
task = NULL;
goto done;
case ASSET_PROXIED:{
GESAsset *target = ges_asset_get_proxy (asset);
if (target == NULL) {
GST_ERROR ("Asset %s proxied against an asset (%s) we do not"
" have in cache, something massively screwed",
asset->priv->id, asset->priv->proxied_asset_id);
goto done;
}
asset = target;
break;
}
case ASSET_NEEDS_RELOAD:
GST_DEBUG_OBJECT (asset, "Asset in cache and needs reload");
ges_asset_cache_append_task (extractable_type, real_id, task);
task = NULL;
GES_ASSET_GET_CLASS (asset)->start_loading (asset, &error);
goto done;
case ASSET_INITIALIZED_WITH_ERROR:
g_task_return_error (task,
2019-03-28 16:51:36 +00:00
error ? g_error_copy (error) : g_error_copy (asset->priv->error));
g_clear_error (&error);
goto done;
default:
GST_WARNING ("Case %i not handle, returning", asset->priv->state);
return;
}
}
}
g_async_initable_new_async (ges_extractable_type_get_asset_type
(extractable_type), G_PRIORITY_DEFAULT, cancellable, callback, user_data,
"id", real_id, "extractable-type", extractable_type, NULL);
done:
2019-03-28 16:05:45 +00:00
if (task)
gst_object_unref (task);
if (real_id)
g_free (real_id);
}
/**
* ges_asset_needs_reload
* @extractable_type: The #GType of the object that can be extracted from the
* asset to be reloaded.
* @id: The identifier of the asset to mark as needing reload
*
* Sets an asset from the internal cache as needing reload. An asset needs reload
* in the case where, for example, we were missing a GstPlugin to use it and that
* plugin has been installed, or, that particular asset content as changed
* meanwhile (in the case of the usage of proxies).
*
* Once an asset has been set as "needs reload", requesting that asset again
* will lead to it being re discovered, and reloaded as if it was not in the
* cache before.
*
* Returns: %TRUE if the asset was in the cache and could be set as needing reload,
* %FALSE otherwise.
*/
gboolean
ges_asset_needs_reload (GType extractable_type, const gchar * id)
{
gchar *real_id;
GESAsset *asset;
GError *error = NULL;
real_id = _check_and_update_parameters (&extractable_type, id, &error);
if (error) {
2019-03-28 16:08:01 +00:00
_ensure_asset_for_wrong_id (id, extractable_type, error);
real_id = g_strdup (id);
}
asset = ges_asset_cache_lookup (extractable_type, real_id);
if (real_id) {
g_free (real_id);
}
if (asset) {
GST_DEBUG_OBJECT (asset,
"Asset with id %s switch state to ASSET_NEEDS_RELOAD",
ges_asset_get_id (asset));
asset->priv->state = ASSET_NEEDS_RELOAD;
g_clear_error (&asset->priv->error);
return TRUE;
}
GST_DEBUG ("Asset with id %s not found in cache", id);
return FALSE;
}
/**
* ges_asset_get_id:
* @self: The #GESAsset to get ID from
*
* Gets the ID of a #GESAsset
*
* Returns: The ID of @self
*/
const gchar *
ges_asset_get_id (GESAsset * self)
{
g_return_val_if_fail (GES_IS_ASSET (self), NULL);
return self->priv->id;
}
/**
* ges_asset_extract:
* @self: The #GESAsset to get extract an object from
* @error: (allow-none): An error to be set in case something wrong happens or %NULL
*
* Extracts a new #GObject from @asset. The type of the object is
* defined by the extractable-type of @asset, you can check what
* type will be extracted from @asset using
* #ges_asset_get_extractable_type
*
* Returns: (transfer floating) (allow-none): A newly created #GESExtractable
*/
GESExtractable *
ges_asset_extract (GESAsset * self, GError ** error)
{
GESExtractable *extractable;
g_return_val_if_fail (GES_IS_ASSET (self), NULL);
g_return_val_if_fail (GES_ASSET_GET_CLASS (self)->extract, NULL);
GST_DEBUG_OBJECT (self, "Extracting asset of type %s",
g_type_name (self->priv->extractable_type));
extractable = GES_ASSET_GET_CLASS (self)->extract (self, error);
if (extractable == NULL)
return NULL;
if (ges_extractable_get_asset (extractable) == NULL)
ges_extractable_set_asset (extractable, self);
return extractable;
}
/**
* ges_asset_request_finish:
* @res: The #GAsyncResult from which to get the newly created #GESAsset
* @error: (out) (allow-none) (transfer full): An error to be set in case
* something wrong happens or %NULL
*
* Finalize the request of an async #GESAsset
*
* Returns: (transfer full)(allow-none): The #GESAsset previously requested
*/
GESAsset *
ges_asset_request_finish (GAsyncResult * res, GError ** error)
{
GObject *object;
GObject *source_object;
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
source_object = g_async_result_get_source_object (res);
g_assert (source_object != NULL);
object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
res, error);
gst_object_unref (source_object);
return GES_ASSET (object);
}
/**
* ges_list_assets:
2018-10-22 09:39:03 +00:00
* @filter: Type of assets to list, `GES_TYPE_EXTRACTABLE` will list
* all assets
*
* List all @asset filtering per filter as defined by @filter.
* It copies the asset and thus will not be updated in time.
*
* Returns: (transfer container) (element-type GESAsset): The list of
* #GESAsset the object contains
*/
GList *
ges_list_assets (GType filter)
{
GList *ret = NULL;
GESAsset *asset;
GHashTableIter iter, types_iter;
gpointer key, value, typename, assets;
g_return_val_if_fail (g_type_is_a (filter, GES_TYPE_EXTRACTABLE), NULL);
LOCK_CACHE;
g_hash_table_iter_init (&types_iter, type_entries_table);
while (g_hash_table_iter_next (&types_iter, &typename, &assets)) {
if (g_type_is_a (filter, g_type_from_name ((gchar *) typename)) == FALSE)
continue;
g_hash_table_iter_init (&iter, (GHashTable *) assets);
while (g_hash_table_iter_next (&iter, &key, &value)) {
asset = ((GESAssetCacheEntry *) value)->asset;
if (g_type_is_a (asset->priv->extractable_type, filter))
ret = g_list_append (ret, asset);
}
}
UNLOCK_CACHE;
return ret;
}
/**
* ges_asset_get_error:
* @self: The asset to retrieve the error from
*
* Returns: (transfer none) (nullable): The #GError of the asset or %NULL if
* the asset was loaded without issue
*
* Since: 1.8
*/
GError *
ges_asset_get_error (GESAsset * self)
{
g_return_val_if_fail (GES_IS_ASSET (self), NULL);
return self->priv->error;
}