gstreamer/ges/ges-asset-file-source.c
Volodymyr Rudyi 107b4ad0c6 ges: Implement GESAssetFileSource
+ Generate the documentation
	+ Make the new Asset infrastructure compile

Co-Authored-By: Thibault Saunier <thibault.saunier@collabora.com>
2012-12-19 18:59:47 -03:00

439 lines
13 KiB
C

/* GStreamer Editing Services
*
* Copyright (C) 2012 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: ges-asset-file-source
* @short_description: A #GESAsset subclass speciliazed in #GESTimelineFileSource extraction
*
* The #GESAssetFileSource is a special #GESAssetFileSource that lets you handle
* the media file to use inside the GStreamer Editing Services. It has APIs that
* let you get information about the medias. Also, the tags found in the media file are
* set as Metadatas of the Asser.
*/
#include <gst/pbutils/pbutils.h>
#include "ges.h"
#include "ges-internal.h"
static GHashTable *parent_newparent_table = NULL;
static void
initable_iface_init (GInitableIface * initable_iface)
{
/* We can not iniate synchronously */
initable_iface->init = NULL;
}
G_DEFINE_TYPE_WITH_CODE (GESAssetFileSource, ges_asset_filesource,
GES_TYPE_ASSET,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init));
/* TODO: We should monitor files here, and add some way of reporting changes
* to user
*/
enum
{
PROP_0,
PROP_DURATION,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void discoverer_discovered_cb (GstDiscoverer * discoverer,
GstDiscovererInfo * info, GError * err, gpointer user_data);
struct _GESAssetFileSourcePrivate
{
GstDiscovererInfo *info;
GstClockTime duration;
gboolean is_image;
};
static void
ges_asset_filesource_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESAssetFileSourcePrivate *priv = GES_ASSET_FILESOURCE (object)->priv;
switch (property_id) {
case PROP_DURATION:
g_value_set_uint64 (value, priv->duration);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_asset_filesource_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESAssetFileSourcePrivate *priv = GES_ASSET_FILESOURCE (object)->priv;
switch (property_id) {
case PROP_DURATION:
priv->duration = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static GESAssetLoadingReturn
_start_loading (GESAsset * asset, GError ** error)
{
gboolean ret;
const gchar *uri;
GESAssetFileSourceClass *class = GES_ASSET_FILESOURCE_GET_CLASS (asset);
GST_DEBUG ("Started loading %p", asset);
uri = ges_asset_get_id (asset);
ret = gst_discoverer_discover_uri_async (class->discoverer, uri);
if (ret)
return GES_ASSET_LOADING_ASYNC;
return GES_ASSET_LOADING_ERROR;
}
static GESExtractable *
ges_asset_filesource_extract (GESAsset * self, GError ** error)
{
const gchar *uri = ges_asset_get_id (self);
GESTrackType supportedformats;
GESTimelineFileSource *tfs = ges_timeline_filesource_new ((gchar *) uri);
GST_DEBUG_OBJECT (self, "Extracting filesource with uri %s", uri);
ges_meta_container_get_uint (GES_META_CONTAINER (self),
GES_META_TIMELINE_OBJECT_SUPPORTED_FORMATS, &supportedformats);
ges_timeline_object_set_supported_formats (GES_TIMELINE_OBJECT (tfs),
supportedformats);
return GES_EXTRACTABLE (tfs);
}
static gboolean
_request_id_update (GESAsset * self, gchar ** proposed_new_id, GError * error)
{
if (error->domain == GST_RESOURCE_ERROR &&
error->code == GST_RESOURCE_ERROR_NOT_FOUND) {
const gchar *uri = ges_asset_get_id (self);
GFile *parent, *file = g_file_new_for_uri (uri);
/* Check if we have the new parent in cache */
parent = g_file_get_parent (file);
if (parent) {
GFile *new_parent = g_hash_table_lookup (parent_newparent_table, parent);
if (new_parent) {
gchar *basename = g_file_get_basename (file);
GFile *new_file = g_file_get_child (new_parent, basename);
*proposed_new_id = g_file_get_uri (new_file);
g_object_unref (new_file);
g_object_unref (parent);
g_free (basename);
}
}
g_object_unref (file);
return TRUE;
}
return FALSE;
}
static void
_asset_proxied (GESAsset * self, const gchar * new_uri)
{
const gchar *uri = ges_asset_get_id (self);
GFile *parent, *new_parent, *new_file = g_file_new_for_uri (new_uri),
*file = g_file_new_for_uri (uri);
parent = g_file_get_parent (file);
new_parent = g_file_get_parent (new_file);
g_hash_table_insert (parent_newparent_table, parent, new_parent);
g_object_unref (file);
g_object_unref (new_file);
}
static void
ges_asset_filesource_class_init (GESAssetFileSourceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESAssetFileSourcePrivate));
object_class->get_property = ges_asset_filesource_get_property;
object_class->set_property = ges_asset_filesource_set_property;
GES_ASSET_CLASS (klass)->start_loading = _start_loading;
GES_ASSET_CLASS (klass)->request_id_update = _request_id_update;
GES_ASSET_CLASS (klass)->inform_proxy = _asset_proxied;
GES_ASSET_CLASS (klass)->extract = ges_asset_filesource_extract;
/**
* GESAssetFileSource:duration:
*
* The duration (in nanoseconds) of the media file
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration", "The duration to use", 0,
G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_DURATION,
properties[PROP_DURATION]);
klass->discoverer = gst_discoverer_new (GST_SECOND, NULL);
g_signal_connect (klass->discoverer, "discovered",
G_CALLBACK (discoverer_discovered_cb), NULL);
/* We just start the discoverer and let it live */
gst_discoverer_start (klass->discoverer);
if (parent_newparent_table == NULL) {
parent_newparent_table = g_hash_table_new_full (g_file_hash,
(GEqualFunc) g_file_equal, g_object_unref, g_object_unref);
}
}
static void
ges_asset_filesource_init (GESAssetFileSource * self)
{
GESAssetFileSourcePrivate *priv;
priv = self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_ASSET_FILESOURCE, GESAssetFileSourcePrivate);
priv->info = NULL;
priv->duration = GST_CLOCK_TIME_NONE;
priv->is_image = FALSE;
}
static void
ges_asset_filesource_set_info (GESAssetFileSource * self,
GstDiscovererInfo * info)
{
GList *tmp, *stream_list;
GESTrackType supportedformats = GES_TRACK_TYPE_UNKNOWN;
GESAssetFileSourcePrivate *priv = GES_ASSET_FILESOURCE (self)->priv;
/* Extract infos from the GstDiscovererInfo */
stream_list = gst_discoverer_info_get_stream_list (info);
for (tmp = stream_list; tmp; tmp = tmp->next) {
GstDiscovererStreamInfo *sinf = (GstDiscovererStreamInfo *) tmp->data;
if (GST_IS_DISCOVERER_AUDIO_INFO (sinf)) {
if (supportedformats == GES_TRACK_TYPE_UNKNOWN)
supportedformats = GES_TRACK_TYPE_AUDIO;
else
supportedformats |= GES_TRACK_TYPE_AUDIO;
} else if (GST_IS_DISCOVERER_VIDEO_INFO (sinf)) {
if (supportedformats == GES_TRACK_TYPE_UNKNOWN)
supportedformats = GES_TRACK_TYPE_VIDEO;
else
supportedformats |= GES_TRACK_TYPE_VIDEO;
if (gst_discoverer_video_info_is_image ((GstDiscovererVideoInfo *)
sinf)) {
priv->is_image = TRUE;
}
} else
supportedformats = GES_TRACK_TYPE_UNKNOWN;
}
ges_meta_container_set_uint (GES_META_CONTAINER (self),
GES_META_TIMELINE_OBJECT_SUPPORTED_FORMATS, supportedformats);
if (stream_list)
gst_discoverer_stream_info_list_free (stream_list);
if (priv->is_image == FALSE)
priv->duration = gst_discoverer_info_get_duration (info);
/* else we keep #GST_CLOCK_TIME_NONE */
priv->info = g_object_ref (info);
}
static void
_set_meta_foreach (const GstTagList * tags, const gchar * tag,
GESMetaContainer * container)
{
GValue value = { 0 };
gst_tag_list_copy_value (&value, tags, tag);
ges_meta_container_set_meta (container, tag, &value);
g_value_unset (&value);
}
static void
discoverer_discovered_cb (GstDiscoverer * discoverer,
GstDiscovererInfo * info, GError * err, gpointer user_data)
{
const GstTagList *tags;
const gchar *uri = gst_discoverer_info_get_uri (info);
GESAssetFileSource *mfs =
GES_ASSET_FILESOURCE (ges_asset_cache_lookup
(GES_TYPE_TIMELINE_FILE_SOURCE, uri));
tags = gst_discoverer_info_get_tags (info);
if (tags)
gst_tag_list_foreach (tags, (GstTagForeachFunc) _set_meta_foreach, mfs);
if (err == NULL)
ges_asset_filesource_set_info (mfs, info);
ges_asset_cache_set_loaded (GES_TYPE_TIMELINE_FILE_SOURCE, uri, err);
}
/* API implementation */
/**
* ges_asset_filesource_get_info:
* @self: Target asset
*
* Gets #GstDiscovererInfo about the file
*
* Returns: (transfer none): #GstDiscovererInfo of specified asset
*/
GstDiscovererInfo *
ges_asset_filesource_get_info (const GESAssetFileSource * self)
{
return self->priv->info;
}
/**
* ges_asset_filesource_get_duration:
* @self: a #GESAssetFileSource
*
* Gets duration of the file represented by @self
*
* Returns: The duration of @self
*/
GstClockTime
ges_asset_filesource_get_duration (GESAssetFileSource * self)
{
g_return_val_if_fail (GES_IS_ASSET_FILESOURCE (self), GST_CLOCK_TIME_NONE);
return self->priv->duration;
}
/**
* ges_asset_filesource_get_supported_types:
* @self: a #GESAssetFileSource
*
* Gets track types the file as
*
* Returns: The track types on which @self will create TrackObject when added to
* a layer
*/
GESTrackType
ges_asset_filesource_get_supported_types (GESAssetFileSource * self)
{
GESTrackType supportedformats;
g_return_val_if_fail (GES_IS_ASSET_FILESOURCE (self), GES_TRACK_TYPE_UNKNOWN);
ges_meta_container_get_uint (GES_META_CONTAINER (self),
GES_META_TIMELINE_OBJECT_SUPPORTED_FORMATS, &supportedformats);
return supportedformats;
}
/**
* ges_asset_filesource_is_image:
* @self: a #indent: Standard input:311: Error:Unexpected end of file
GESAssetFileSource
*
* Gets Whether the file represented by @self is an image or not
*
* Returns: Whether the file represented by @self is an image or not
*/
gboolean
ges_asset_filesource_is_image (GESAssetFileSource * self)
{
g_return_val_if_fail (GES_IS_ASSET_FILESOURCE (self), FALSE);
return self->priv->is_image;
}
/**
* ges_asset_filesource_new:
* @uri: The URI of the file for which to create a #GESAssetFileSource
* @cancellable: optional %GCancellable object, %NULL to ignore.
* @callback: (scope async): a #GAsyncReadyCallback to call when the initialization is finished
* @user_data: The user data to pass when @callback is called
*
* Creates a #GESAssetFileSource for @uri
*
* Example of request of a GESAssetFileSource:
* |[
* // The request callback
* static void
* filesource_asset_loaded_cb (GESAsset * source, GAsyncResult * res, gpointer user_data)
* {
* GError *error = NULL;
* GESAssetFileSource *filesource_asset;
*
* filesource_asset = GES_ASSET_FILESOURCE (ges_asset_request_finish (res, &error));
* if (filesource_asset) {
* g_print ("The file: %s is usable as a FileSource, it is%s an image and lasts %" GST_TIME_FORMAT,
* ges_asset_get_id (GES_ASSET (filesource_asset))
* ges_asset_filesource_is_image (filesource_asset) ? "" : " not",
* GST_TIME_ARGS (ges_asset_filesource_get_duration (filesource_asset));
* } else {
* g_print ("The file: %s is *not* usable as a FileSource because: %s",
* ges_asset_get_id (source), error->message);
* }
*
* g_object_unref (mfs);
* }
*
* // The request:
* ges_asset_filesource_new (uri, (GAsyncReadyCallback) filesource_asset_loaded_cb, user_data);
* ]|
*/
void
ges_asset_filesource_new (const gchar * uri, GCancellable * cancellable,
GAsyncReadyCallback callback, gpointer user_data)
{
ges_asset_request_async (GES_TYPE_TIMELINE_FILE_SOURCE, uri, cancellable,
callback, user_data);
}
/**
* ges_asset_filesource_set_timeout:
* @class: The #GESAssetFileSourceClass on which to set the discoverer timeout
* @timeout: The timeout to set
*
* Sets the timeout of #GESAssetFileSource loading
*/
void
ges_asset_filesource_set_timeout (GESAssetFileSourceClass * class,
GstClockTime timeout)
{
g_return_if_fail (GES_IS_ASSET_FILESOURCE_CLASS (class));
g_object_set (class->discoverer, "timeout", timeout, NULL);
}