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238 lines
7 KiB
C
238 lines
7 KiB
C
/* Gstreamer Editing Services
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*
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* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION: gesclipasset
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* @title: GESClipAsset
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* @short_description: A GESAsset subclass specialized in GESClip extraction
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*
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* The #GESUriClipAsset is a special #GESAsset specilized in #GESClip.
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* it is mostly used to get information about the #GESTrackType-s the objects extracted
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* from it can potentialy create #GESTrackElement for.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ges-clip-asset.h"
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#include "ges-source-clip.h"
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#include "ges-internal.h"
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#define GES_CLIP_ASSET_GET_PRIVATE(o)\
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(G_TYPE_INSTANCE_GET_PRIVATE ((o), GES_TYPE_CLIP_ASSET, \
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GESClipAssetPrivate))
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#define parent_class ges_clip_asset_parent_class
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struct _GESClipAssetPrivate
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{
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GESTrackType supportedformats;
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};
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enum
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{
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PROP_0,
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PROP_SUPPORTED_FORMATS,
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PROP_LAST
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};
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static GParamSpec *properties[PROP_LAST];
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G_DEFINE_TYPE_WITH_PRIVATE (GESClipAsset, ges_clip_asset, GES_TYPE_ASSET);
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/***********************************************
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* *
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* GObject vmetods implemenation *
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* *
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***********************************************/
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static void
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_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GESClipAssetPrivate *priv = GES_CLIP_ASSET (object)->priv;
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switch (property_id) {
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case PROP_SUPPORTED_FORMATS:
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g_value_set_flags (value, priv->supportedformats);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GESClipAssetPrivate *priv = GES_CLIP_ASSET (object)->priv;
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switch (property_id) {
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case PROP_SUPPORTED_FORMATS:
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priv->supportedformats = g_value_get_flags (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ges_clip_asset_init (GESClipAsset * self)
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{
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self->priv = ges_clip_asset_get_instance_private (self);
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}
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static void
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_constructed (GObject * object)
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{
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GType extractable_type = ges_asset_get_extractable_type (GES_ASSET (object));
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GObjectClass *class = g_type_class_ref (extractable_type);
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GParamSpecFlags *pspec;
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pspec = G_PARAM_SPEC_FLAGS (g_object_class_find_property (class,
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"supported-formats"));
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GES_CLIP_ASSET (object)->priv->supportedformats = pspec->default_value;
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g_type_class_unref (class);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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}
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static void
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ges_clip_asset_class_init (GESClipAssetClass * self_class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (self_class);
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object_class->constructed = _constructed;
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object_class->get_property = _get_property;
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object_class->set_property = _set_property;
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/**
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* GESClipAsset:supported-formats:
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*
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* The formats supported by the asset.
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*/
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properties[PROP_SUPPORTED_FORMATS] = g_param_spec_flags ("supported-formats",
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"Supported formats", "Formats supported by the file",
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GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_AUDIO | GES_TRACK_TYPE_VIDEO,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
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g_object_class_install_property (object_class, PROP_SUPPORTED_FORMATS,
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properties[PROP_SUPPORTED_FORMATS]);
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}
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/***********************************************
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* *
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* Public methods *
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* *
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***********************************************/
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/**
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* ges_clip_asset_set_supported_formats:
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* @self: a #GESClipAsset
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* @supportedformats: The track types supported by the GESClipAsset
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*
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* Sets track types for which objects extracted from @self can create #GESTrackElement
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*/
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void
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ges_clip_asset_set_supported_formats (GESClipAsset * self,
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GESTrackType supportedformats)
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{
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g_return_if_fail (GES_IS_CLIP_ASSET (self));
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self->priv->supportedformats = supportedformats;
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}
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/**
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* ges_clip_asset_get_supported_formats:
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* @self: a #GESClipAsset
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*
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* Gets track types for which objects extracted from @self can create #GESTrackElement
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*
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* Returns: The track types on which @self will create TrackElement when added to
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* a layer
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*/
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GESTrackType
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ges_clip_asset_get_supported_formats (GESClipAsset * self)
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{
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g_return_val_if_fail (GES_IS_CLIP_ASSET (self), GES_TRACK_TYPE_UNKNOWN);
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return self->priv->supportedformats;
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}
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/**
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* ges_clip_asset_get_natural_framerate:
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* @self: The object from which to retrieve the natural framerate
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* @framerate_n: The framerate numerator
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* @framerate_d: The framerate denominator
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*
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* Result: %TRUE if @self has a natural framerate %FALSE otherwise
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*
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* Since: 1.18
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*/
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gboolean
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ges_clip_asset_get_natural_framerate (GESClipAsset * self,
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gint * framerate_n, gint * framerate_d)
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{
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GESClipAssetClass *klass;
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g_return_val_if_fail (GES_IS_CLIP_ASSET (self), FALSE);
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g_return_val_if_fail (framerate_n && framerate_d, FALSE);
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klass = GES_CLIP_ASSET_GET_CLASS (self);
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*framerate_n = 0;
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*framerate_d = -1;
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if (klass->get_natural_framerate)
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return klass->get_natural_framerate (self, framerate_n, framerate_d);
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return FALSE;
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}
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/**
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* ges_clip_asset_get_frame_time:
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* @self: The object for which to compute timestamp for specifed frame
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* @frame_number: The frame number we want the internal time coordinate timestamp of
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*
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* Converts the given frame number into a timestamp, using the "natural" frame
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* rate of the asset.
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*
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* You can use this to reference a specific frame in a media file and use this
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* as, for example, the `in-point` or `max-duration` of a #GESClip.
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*
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* Returns: The timestamp corresponding to @frame_number in the element source, given
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* in internal time coordinates, or #GST_CLOCK_TIME_NONE if the clip asset does not have a
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* natural frame rate.
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*
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* Since: 1.18
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*/
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GstClockTime
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ges_clip_asset_get_frame_time (GESClipAsset * self, GESFrameNumber frame_number)
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{
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gint fps_n, fps_d;
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g_return_val_if_fail (GES_IS_CLIP_ASSET (self), GST_CLOCK_TIME_NONE);
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g_return_val_if_fail (GES_FRAME_NUMBER_IS_VALID (frame_number),
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GST_CLOCK_TIME_NONE);
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if (!ges_clip_asset_get_natural_framerate (self, &fps_n, &fps_d))
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return GST_CLOCK_TIME_NONE;
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return gst_util_uint64_scale_ceil (frame_number, fps_d * GST_SECOND, fps_n);
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}
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