gstreamer/subprojects/gst-editing-services/examples/c/thumbnails.c

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/* GStreamer Editing Services
* Copyright (C) 2010 Edward Hervey <bilboed@bilboed.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
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <ges/ges.h>
#include <gst/pbutils/encoding-profile.h>
/* GLOBAL VARIABLE */
static guint repeat = 0;
GESPipeline *pipeline = NULL;
static gboolean thumbnail_cb (gpointer pipeline);
#define TEST_PATH "test_thumbnail.jpg"
static gboolean
thumbnail_cb (gpointer user)
{
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GstSample *b = NULL;
GstCaps *caps;
GESPipeline *p;
p = GES_PIPELINE (user);
caps = gst_caps_from_string ("image/jpeg");
GST_INFO ("getting thumbnails");
/* check raw rgb use-case with scaling */
b = ges_pipeline_get_thumbnail_rgb24 (p, 320, 240);
g_assert (b);
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gst_sample_unref (b);
/* check encoding use-case from caps */
b = NULL;
b = ges_pipeline_get_thumbnail (p, caps);
g_assert (b);
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gst_sample_unref (b);
g_assert (ges_pipeline_save_thumbnail (p, -1, -1, (gchar *)
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"image/jpeg", (gchar *) TEST_PATH, NULL));
g_assert (g_file_test (TEST_PATH, G_FILE_TEST_EXISTS));
g_unlink (TEST_PATH);
gst_caps_unref (caps);
return FALSE;
}
static GESPipeline *
create_timeline (void)
{
GESPipeline *pipeline;
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GESLayer *layer;
GESTrack *tracka, *trackv;
GESTimeline *timeline;
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GESClip *src;
timeline = ges_timeline_new ();
tracka = GES_TRACK (ges_audio_track_new ());
trackv = GES_TRACK (ges_video_track_new ());
layer = ges_layer_new ();
/* Add the tracks and the layer to the timeline */
if (!ges_timeline_add_layer (timeline, layer) ||
!ges_timeline_add_track (timeline, tracka) ||
!ges_timeline_add_track (timeline, trackv))
return NULL;
/* Add the main audio/video file */
src = GES_CLIP (ges_test_clip_new ());
g_object_set (src,
"vpattern", GES_VIDEO_TEST_PATTERN_SNOW,
"start", 0, "duration", 10 * GST_SECOND, NULL);
ges_layer_add_clip (layer, GES_CLIP (src));
pipeline = ges_pipeline_new ();
if (!ges_pipeline_set_timeline (pipeline, timeline))
return NULL;
return pipeline;
}
static void
bus_message_cb (GstBus * bus, GstMessage * message, GMainLoop * mainloop)
{
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_ERROR:
gst_print ("ERROR\n");
g_main_loop_quit (mainloop);
break;
case GST_MESSAGE_EOS:
if (repeat > 0) {
gst_print ("Looping again\n");
/* No need to change state before */
gst_element_seek_simple (GST_ELEMENT (pipeline), GST_FORMAT_TIME,
GST_SEEK_FLAG_FLUSH, 0);
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
repeat -= 1;
} else {
gst_print ("Done\n");
g_main_loop_quit (mainloop);
}
break;
default:
break;
}
}
int
main (int argc, gchar ** argv)
{
GError *err = NULL;
GOptionEntry options[] = {
{NULL}
};
GOptionContext *ctx;
GMainLoop *mainloop;
GstBus *bus;
ctx = g_option_context_new ("tests thumbnail supoprt (produces no output)");
g_option_context_set_summary (ctx, "");
g_option_context_add_main_entries (ctx, options, NULL);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
gst_print ("Error initializing: %s\n", err->message);
g_option_context_free (ctx);
g_clear_error (&err);
exit (1);
}
g_option_context_free (ctx);
/* Initialize the GStreamer Editing Services */
ges_init ();
/* Create the pipeline */
pipeline = create_timeline ();
if (!pipeline)
exit (-1);
ges_pipeline_set_mode (pipeline, GES_PIPELINE_MODE_PREVIEW);
/* Play the pipeline */
mainloop = g_main_loop_new (NULL, FALSE);
gst_print ("thumbnailing every 1 seconds\n");
g_timeout_add (1000, thumbnail_cb, pipeline);
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_signal_watch (bus);
g_signal_connect (bus, "message", G_CALLBACK (bus_message_cb), mainloop);
if (gst_element_set_state (GST_ELEMENT (pipeline),
GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {
gst_print ("Failed to start the encoding\n");
return 1;
}
g_main_loop_run (mainloop);
gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
gst_object_unref (pipeline);
return 0;
}