gstreamer/ges/ges-multi-file-source.c

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/* GStreamer Editing Services
* Copyright (C) 2013 Lubosz Sarnecki <lubosz@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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gesmultifilesource
* @title: GESMultiFileSource
* @short_description: outputs the video stream from a sequence of images.
*
* Outputs the video stream from a given image sequence. The start frame
* chosen will be determined by the in-point property on the track element.
*/
#include <stdlib.h>
#include <string.h>
#include "ges-internal.h"
#include "ges-track-element.h"
#include "ges-multi-file-source.h"
#include "ges-extractable.h"
#include "ges-uri-asset.h"
#include "ges-internal.h"
/* Extractable interface implementation */
static gchar *
ges_extractable_check_id (GType type, const gchar * id, GError ** error)
{
return g_strdup (id);
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->check_id = ges_extractable_check_id;
}
G_DEFINE_TYPE_WITH_CODE (GESMultiFileSource, ges_multi_file_source,
GES_TYPE_VIDEO_SOURCE,
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
ges_extractable_interface_init));
struct _GESMultiFileSourcePrivate
{
/* Dummy variable */
void *nothing;
};
enum
{
PROP_0,
PROP_URI
};
static void
ges_multi_file_source_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESMultiFileSource *uriclip = GES_MULTI_FILE_SOURCE (object);
switch (property_id) {
case PROP_URI:
g_value_set_string (value, uriclip->uri);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_multi_file_source_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESMultiFileSource *uriclip = GES_MULTI_FILE_SOURCE (object);
switch (property_id) {
case PROP_URI:
uriclip->uri = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_multi_file_source_dispose (GObject * object)
{
GESMultiFileSource *uriclip = GES_MULTI_FILE_SOURCE (object);
if (uriclip->uri)
g_free (uriclip->uri);
G_OBJECT_CLASS (ges_multi_file_source_parent_class)->dispose (object);
}
static void
pad_added_cb (GstElement * decodebin, GstPad * pad, GstElement * bin)
{
GstPad *srcpad;
srcpad = gst_ghost_pad_new ("src", pad);
gst_pad_set_active (srcpad, TRUE);
gst_element_add_pad (bin, srcpad);
}
/**
* ges_multi_file_uri_new: (skip)
*
* Reads start/stop index and location from a multifile uri.
*
*/
GESMultiFileURI *
ges_multi_file_uri_new (const gchar * uri)
{
gchar *colon = NULL;
gchar *at = NULL;
gchar *indices;
int charpos;
GESMultiFileURI *uri_data;
const int prefix_size = strlen (GES_MULTI_FILE_URI_PREFIX);
uri_data = malloc (sizeof (GESMultiFileURI));
uri_data->start = 0;
uri_data->end = -1;
at = strchr (uri, '@');
if (at != NULL) {
charpos = (int) (at - uri);
indices = g_strdup_printf ("%.*s", charpos, uri);
indices = &indices[prefix_size];
colon = strchr (indices, ':');
if (colon != NULL) {
charpos = (int) (colon - indices);
uri_data->end = atoi (colon + 1);
uri_data->start = atoi (g_strdup_printf ("%.*s", charpos, indices));
GST_DEBUG ("indices start: %d end %d\n", uri_data->start, uri_data->end);
} else {
GST_ERROR
("Malformated multifile uri. You are using '@' and are missing ':'");
}
uri_data->location = at + 1;
} else {
uri_data->location = g_strdup (&uri[prefix_size]);
}
GST_DEBUG ("location: %s\n", uri_data->location);
return uri_data;
}
static GstElement *
ges_multi_file_source_create_source (GESTrackElement * track_element)
{
GESMultiFileSource *self;
GstElement *bin, *src, *decodebin;
GstCaps *disc_caps;
GstDiscovererStreamInfo *stream_info;
GValue fps = G_VALUE_INIT;
GstCaps *caps;
GESUriSourceAsset *asset;
GESMultiFileURI *uri_data;
self = (GESMultiFileSource *) track_element;
asset =
GES_URI_SOURCE_ASSET (ges_extractable_get_asset (GES_EXTRACTABLE (self)));
if (asset != NULL) {
stream_info = ges_uri_source_asset_get_stream_info (asset);
g_assert (stream_info);
disc_caps = gst_discoverer_stream_info_get_caps (stream_info);
caps = gst_caps_copy (disc_caps);
GST_DEBUG_OBJECT (disc_caps, "Got some nice caps");
gst_object_unref (stream_info);
gst_caps_unref (disc_caps);
} else {
caps = gst_caps_new_empty ();
GST_WARNING ("Could not extract asset.");
}
g_value_init (&fps, GST_TYPE_FRACTION);
gst_value_set_fraction (&fps, 25, 1);
gst_caps_set_value (caps, "framerate", &fps);
bin = GST_ELEMENT (gst_bin_new ("multi-image-bin"));
src = gst_element_factory_make ("multifilesrc", NULL);
uri_data = ges_multi_file_uri_new (self->uri);
g_object_set (src, "start-index", uri_data->start, "stop-index",
uri_data->end, "caps", caps, "location", uri_data->location, NULL);
g_free (uri_data);
decodebin = gst_element_factory_make ("decodebin", NULL);
gst_bin_add_many (GST_BIN (bin), src, decodebin, NULL);
gst_element_link_pads_full (src, "src", decodebin, "sink",
GST_PAD_LINK_CHECK_NOTHING);
g_signal_connect (G_OBJECT (decodebin), "pad-added",
G_CALLBACK (pad_added_cb), bin);
return bin;
}
static void
ges_multi_file_source_class_init (GESMultiFileSourceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESMultiFileSourcePrivate));
object_class->get_property = ges_multi_file_source_get_property;
object_class->set_property = ges_multi_file_source_set_property;
object_class->dispose = ges_multi_file_source_dispose;
/**
* GESMultiFileSource:uri:
*
* The uri of the file/resource to use. You can set a start index,
* a stop index and a sequence pattern.
* The format is &lt;multifile://start:stop\@location-pattern&gt;.
* The pattern uses printf string formating.
*
* Example uris:
*
* multifile:///home/you/image\%03d.jpg
*
* multifile://20:50@/home/you/sequence/\%04d.png
*
*/
g_object_class_install_property (object_class, PROP_URI,
g_param_spec_string ("uri", "URI", "multifile uri",
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
source_class->create_source = ges_multi_file_source_create_source;
}
static void
ges_multi_file_source_init (GESMultiFileSource * self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_MULTI_FILE_SOURCE, GESMultiFileSourcePrivate);
}
/**
* ges_multi_file_source_new:
* @uri: the URI the source should control
*
* Creates a new #GESMultiFileSource for the provided @uri.
*
* Returns: (transfer floating): A new #GESMultiFileSource.
*/
GESMultiFileSource *
ges_multi_file_source_new (gchar * uri)
{
return g_object_new (GES_TYPE_MULTI_FILE_SOURCE, "uri", uri,
"track-type", GES_TRACK_TYPE_VIDEO, NULL);
}