gstreamer/examples/seeking/seek.c
Wim Taymans 27ebf53a09 examples/seeking/seek.c: Added looping checkbox.
Original commit message from CVS:
* examples/seeking/seek.c: (send_event), (do_seek),
(loop_toggle_cb), (segment_done), (main):
Added looping checkbox.
2005-11-16 10:54:45 +00:00

1455 lines
42 KiB
C

#include <stdlib.h>
#include <glib.h>
#include <gtk/gtk.h>
#include <gst/gst.h>
#include <string.h>
GST_DEBUG_CATEGORY (seek_debug);
#define GST_CAT_DEFAULT (seek_debug)
static GList *seekable_pads = NULL;
static GList *rate_pads = NULL;
static GList *seekable_elements = NULL;
static gboolean accurate_seek = FALSE;
static gboolean keyframe_seek = FALSE;
static gboolean loop_seek = FALSE;
static GstElement *pipeline;
static gint64 position;
static gint64 duration;
static GtkAdjustment *adjustment;
static GtkWidget *hscale;
static gboolean stats = FALSE;
static gboolean elem_seek = FALSE;
static gboolean verbose = FALSE;
static GstState state;
static guint update_id = 0;
static guint seek_timeout_id = 0;
static gulong changed_id;
//#define SOURCE "filesrc"
#define SOURCE "gnomevfssrc"
#define ASINK "alsasink"
//#define ASINK "osssink"
#define VSINK "xvimagesink"
//#define VSINK "sdlvideosink"
//#define VSINK "ximagesink"
//#define VSINK "aasink"
//#define VSINK "cacasink"
//#define UPDATE_INTERVAL 500
#define UPDATE_INTERVAL 100
/* number of milliseconds to play for after a seek */
//#define SCRUB_TIME 250
//#define SCRUB
#define THREAD
#define PAD_SEEK
typedef struct
{
const gchar *padname;
GstPad *target;
GstElement *bin;
}
dyn_link;
static GstElement *
gst_element_factory_make_or_warn (gchar * type, gchar * name)
{
GstElement *element = gst_element_factory_make (type, name);
if (!element) {
g_warning ("Failed to create element %s of type %s", name, type);
}
return element;
}
static void
dynamic_link (GstPadTemplate * templ, GstPad * newpad, gpointer data)
{
gchar *padname;
dyn_link *connect = (dyn_link *) data;
padname = gst_pad_get_name (newpad);
if (connect->padname == NULL || !strcmp (padname, connect->padname)) {
if (connect->bin)
gst_bin_add (GST_BIN (pipeline), connect->bin);
gst_pad_link (newpad, connect->target);
//seekable_pads = g_list_prepend (seekable_pads, newpad);
rate_pads = g_list_prepend (rate_pads, newpad);
}
g_free (padname);
}
static void
setup_dynamic_link (GstElement * element, const gchar * padname,
GstPad * target, GstElement * bin)
{
dyn_link *connect;
connect = g_new0 (dyn_link, 1);
connect->padname = g_strdup (padname);
connect->target = target;
connect->bin = bin;
g_signal_connect (G_OBJECT (element), "pad-added", G_CALLBACK (dynamic_link),
connect);
}
static GstElement *
make_mod_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *decoder, *audiosink;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
decoder = gst_element_factory_make_or_warn ("modplug", "decoder");
audiosink = gst_element_factory_make_or_warn (ASINK, "sink");
//g_object_set (G_OBJECT (audiosink), "sync", FALSE, NULL);
g_object_set (G_OBJECT (src), "location", location, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), decoder);
gst_bin_add (GST_BIN (pipeline), audiosink);
gst_element_link (src, decoder);
gst_element_link (decoder, audiosink);
seekable = gst_element_get_pad (decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (decoder, "sink"));
return pipeline;
}
static GstElement *
make_dv_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *demux, *decoder, *audiosink, *videosink;
GstElement *a_queue, *v_queue;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
demux = gst_element_factory_make_or_warn ("dvdemux", "demuxer");
v_queue = gst_element_factory_make_or_warn ("queue", "v_queue");
decoder = gst_element_factory_make_or_warn ("ffdec_dvvideo", "decoder");
videosink = gst_element_factory_make_or_warn ("xvimagesink", "v_sink");
a_queue = gst_element_factory_make_or_warn ("queue", "a_queue");
audiosink = gst_element_factory_make_or_warn ("alsasink", "a_sink");
g_object_set (G_OBJECT (src), "location", location, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_bin_add (GST_BIN (pipeline), a_queue);
gst_bin_add (GST_BIN (pipeline), audiosink);
gst_bin_add (GST_BIN (pipeline), v_queue);
gst_bin_add (GST_BIN (pipeline), decoder);
gst_bin_add (GST_BIN (pipeline), videosink);
gst_element_link (src, demux);
gst_element_link (a_queue, audiosink);
gst_element_link (v_queue, decoder);
gst_element_link (decoder, videosink);
setup_dynamic_link (demux, "video", gst_element_get_pad (v_queue, "sink"),
NULL);
setup_dynamic_link (demux, "audio", gst_element_get_pad (a_queue, "sink"),
NULL);
seekable = gst_element_get_pad (decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
return pipeline;
}
static GstElement *
make_wav_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *decoder, *audiosink;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
decoder = gst_element_factory_make_or_warn ("wavparse", "decoder");
audiosink = gst_element_factory_make_or_warn (ASINK, "sink");
g_object_set (G_OBJECT (src), "location", location, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), decoder);
gst_bin_add (GST_BIN (pipeline), audiosink);
gst_element_link (src, decoder);
setup_dynamic_link (decoder, "src", gst_element_get_pad (audiosink, "sink"),
NULL);
seekable_elements = g_list_prepend (seekable_elements, audiosink);
/* force element seeking on this pipeline */
elem_seek = TRUE;
return pipeline;
}
static GstElement *
make_flac_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *decoder, *audiosink;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
decoder = gst_element_factory_make_or_warn ("flacdec", "decoder");
audiosink = gst_element_factory_make_or_warn (ASINK, "sink");
g_object_set (G_OBJECT (audiosink), "sync", FALSE, NULL);
g_object_set (G_OBJECT (src), "location", location, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), decoder);
gst_bin_add (GST_BIN (pipeline), audiosink);
gst_element_link (src, decoder);
gst_element_link (decoder, audiosink);
seekable = gst_element_get_pad (decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (decoder, "sink"));
return pipeline;
}
static GstElement *
make_sid_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *decoder, *audiosink;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
decoder = gst_element_factory_make_or_warn ("siddec", "decoder");
audiosink = gst_element_factory_make_or_warn (ASINK, "sink");
//g_object_set (G_OBJECT (audiosink), "sync", FALSE, NULL);
g_object_set (G_OBJECT (src), "location", location, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), decoder);
gst_bin_add (GST_BIN (pipeline), audiosink);
gst_element_link (src, decoder);
gst_element_link (decoder, audiosink);
seekable = gst_element_get_pad (decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (decoder, "sink"));
return pipeline;
}
static GstElement *
make_parse_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *parser, *fakesink;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
parser = gst_element_factory_make_or_warn ("mpegparse", "parse");
fakesink = gst_element_factory_make_or_warn ("fakesink", "sink");
g_object_set (G_OBJECT (fakesink), "silent", TRUE, NULL);
g_object_set (G_OBJECT (fakesink), "sync", TRUE, NULL);
g_object_set (G_OBJECT (src), "location", location, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), parser);
gst_bin_add (GST_BIN (pipeline), fakesink);
gst_element_link (src, parser);
gst_element_link (parser, fakesink);
seekable = gst_element_get_pad (parser, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (parser, "sink"));
return pipeline;
}
static GstElement *
make_vorbis_pipeline (const gchar * location)
{
GstElement *pipeline, *audio_bin;
GstElement *src, *demux, *decoder, *convert, *audiosink;
GstPad *pad, *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
demux = gst_element_factory_make_or_warn ("oggdemux", "demux");
decoder = gst_element_factory_make_or_warn ("vorbisdec", "decoder");
convert = gst_element_factory_make_or_warn ("audioconvert", "convert");
audiosink = gst_element_factory_make_or_warn (ASINK, "sink");
g_object_set (G_OBJECT (audiosink), "sync", TRUE, NULL);
g_object_set (G_OBJECT (src), "location", location, NULL);
audio_bin = gst_bin_new ("a_decoder_bin");
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_bin_add (GST_BIN (audio_bin), decoder);
gst_bin_add (GST_BIN (audio_bin), convert);
gst_bin_add (GST_BIN (audio_bin), audiosink);
gst_bin_add (GST_BIN (pipeline), audio_bin);
gst_element_link (src, demux);
gst_element_link (decoder, convert);
gst_element_link (convert, audiosink);
pad = gst_element_get_pad (decoder, "sink");
gst_element_add_pad (audio_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, NULL, gst_element_get_pad (audio_bin, "sink"),
NULL);
seekable = gst_element_get_pad (decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (decoder, "sink"));
return pipeline;
}
static GstElement *
make_theora_pipeline (const gchar * location)
{
GstElement *pipeline, *video_bin;
GstElement *src, *demux, *decoder, *convert, *videosink;
GstPad *pad, *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
demux = gst_element_factory_make_or_warn ("oggdemux", "demux");
decoder = gst_element_factory_make_or_warn ("theoradec", "decoder");
convert = gst_element_factory_make_or_warn ("ffmpegcolorspace", "convert");
videosink = gst_element_factory_make_or_warn (VSINK, "sink");
g_object_set (G_OBJECT (src), "location", location, NULL);
video_bin = gst_bin_new ("v_decoder_bin");
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_bin_add (GST_BIN (video_bin), decoder);
gst_bin_add (GST_BIN (video_bin), convert);
gst_bin_add (GST_BIN (video_bin), videosink);
gst_bin_add (GST_BIN (pipeline), video_bin);
gst_element_link (src, demux);
gst_element_link (decoder, convert);
gst_element_link (convert, videosink);
pad = gst_element_get_pad (decoder, "sink");
gst_element_add_pad (video_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, NULL, gst_element_get_pad (video_bin, "sink"),
NULL);
seekable = gst_element_get_pad (decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (decoder, "sink"));
return pipeline;
}
static GstElement *
make_vorbis_theora_pipeline (const gchar * location)
{
GstElement *pipeline, *audio_bin, *video_bin;
GstElement *src, *demux, *a_decoder, *a_convert, *v_decoder, *v_convert;
GstElement *audiosink, *videosink;
GstElement *a_queue, *v_queue;
GstPad *seekable;
GstPad *pad;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
g_object_set (G_OBJECT (src), "location", location, NULL);
demux = gst_element_factory_make_or_warn ("oggdemux", "demux");
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_element_link (src, demux);
audio_bin = gst_bin_new ("a_decoder_bin");
a_queue = gst_element_factory_make_or_warn ("queue", "a_queue");
a_decoder = gst_element_factory_make_or_warn ("vorbisdec", "a_dec");
a_convert = gst_element_factory_make_or_warn ("audioconvert", "a_convert");
audiosink = gst_element_factory_make_or_warn (ASINK, "a_sink");
gst_bin_add (GST_BIN (pipeline), audio_bin);
gst_bin_add (GST_BIN (audio_bin), a_queue);
gst_bin_add (GST_BIN (audio_bin), a_decoder);
gst_bin_add (GST_BIN (audio_bin), a_convert);
gst_bin_add (GST_BIN (audio_bin), audiosink);
gst_element_link (a_queue, a_decoder);
gst_element_link (a_decoder, a_convert);
gst_element_link (a_convert, audiosink);
pad = gst_element_get_pad (a_queue, "sink");
gst_element_add_pad (audio_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, NULL, gst_element_get_pad (audio_bin, "sink"),
NULL);
video_bin = gst_bin_new ("v_decoder_bin");
v_queue = gst_element_factory_make_or_warn ("queue", "v_queue");
v_decoder = gst_element_factory_make_or_warn ("theoradec", "v_dec");
v_convert =
gst_element_factory_make_or_warn ("ffmpegcolorspace", "v_convert");
videosink = gst_element_factory_make_or_warn (VSINK, "v_sink");
gst_bin_add (GST_BIN (pipeline), video_bin);
gst_bin_add (GST_BIN (video_bin), v_queue);
gst_bin_add (GST_BIN (video_bin), v_decoder);
gst_bin_add (GST_BIN (video_bin), v_convert);
gst_bin_add (GST_BIN (video_bin), videosink);
gst_element_link_many (v_queue, v_decoder, v_convert, videosink, NULL);
pad = gst_element_get_pad (v_queue, "sink");
gst_element_add_pad (video_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, NULL, gst_element_get_pad (video_bin, "sink"),
NULL);
seekable = gst_element_get_pad (a_decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (a_decoder, "sink"));
return pipeline;
}
static GstElement *
make_avi_msmpeg4v3_mp3_pipeline (const gchar * location)
{
GstElement *pipeline, *audio_bin, *video_bin;
GstElement *src, *demux, *a_decoder, *a_convert, *v_decoder, *v_convert;
GstElement *audiosink, *videosink;
GstElement *a_queue, *v_queue;
GstPad *seekable, *pad;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
g_object_set (G_OBJECT (src), "location", location, NULL);
demux = gst_element_factory_make_or_warn ("avidemux", "demux");
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_element_link (src, demux);
audio_bin = gst_bin_new ("a_decoder_bin");
a_queue = gst_element_factory_make_or_warn ("queue", "a_queue");
a_decoder = gst_element_factory_make_or_warn ("mad", "a_dec");
a_convert = gst_element_factory_make_or_warn ("audioconvert", "a_convert");
audiosink = gst_element_factory_make_or_warn (ASINK, "a_sink");
gst_bin_add (GST_BIN (audio_bin), a_queue);
gst_bin_add (GST_BIN (audio_bin), a_decoder);
gst_bin_add (GST_BIN (audio_bin), a_convert);
gst_bin_add (GST_BIN (audio_bin), audiosink);
gst_element_link (a_queue, a_decoder);
gst_element_link (a_decoder, a_convert);
gst_element_link (a_convert, audiosink);
gst_bin_add (GST_BIN (pipeline), audio_bin);
pad = gst_element_get_pad (a_queue, "sink");
gst_element_add_pad (audio_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, NULL, gst_element_get_pad (audio_bin, "sink"),
NULL);
video_bin = gst_bin_new ("v_decoder_bin");
v_queue = gst_element_factory_make_or_warn ("queue", "v_queue");
v_decoder = gst_element_factory_make_or_warn ("ffdec_msmpeg4", "v_dec");
v_convert =
gst_element_factory_make_or_warn ("ffmpegcolorspace", "v_convert");
videosink = gst_element_factory_make_or_warn (VSINK, "v_sink");
gst_bin_add (GST_BIN (video_bin), v_queue);
gst_bin_add (GST_BIN (video_bin), v_decoder);
gst_bin_add (GST_BIN (video_bin), v_convert);
gst_bin_add (GST_BIN (video_bin), videosink);
gst_element_link_many (v_queue, v_decoder, v_convert, videosink, NULL);
gst_bin_add (GST_BIN (pipeline), video_bin);
pad = gst_element_get_pad (v_queue, "sink");
gst_element_add_pad (video_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, NULL, gst_element_get_pad (video_bin, "sink"),
NULL);
seekable = gst_element_get_pad (a_decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (a_decoder, "sink"));
return pipeline;
}
static GstElement *
make_mp3_pipeline (const gchar * location)
{
GstElement *pipeline;
GstElement *src, *decoder, *osssink, *queue;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
decoder = gst_element_factory_make_or_warn ("mad", "dec");
queue = gst_element_factory_make_or_warn ("queue", "queue");
osssink = gst_element_factory_make_or_warn (ASINK, "sink");
seekable_elements = g_list_prepend (seekable_elements, osssink);
g_object_set (G_OBJECT (src), "location", location, NULL);
//g_object_set (G_OBJECT (osssink), "fragment", 0x00180008, NULL);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), decoder);
gst_bin_add (GST_BIN (pipeline), queue);
gst_bin_add (GST_BIN (pipeline), osssink);
gst_element_link (src, decoder);
gst_element_link (decoder, queue);
gst_element_link (queue, osssink);
seekable = gst_element_get_pad (queue, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads = g_list_prepend (rate_pads, gst_element_get_pad (decoder, "sink"));
return pipeline;
}
static GstElement *
make_avi_pipeline (const gchar * location)
{
GstElement *pipeline, *audio_bin, *video_bin;
GstElement *src, *demux, *a_decoder, *v_decoder, *audiosink, *videosink;
GstElement *a_queue = NULL, *v_queue = NULL;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
g_object_set (G_OBJECT (src), "location", location, NULL);
demux = gst_element_factory_make_or_warn ("avidemux", "demux");
seekable_elements = g_list_prepend (seekable_elements, demux);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_element_link (src, demux);
audio_bin = gst_bin_new ("a_decoder_bin");
a_decoder = gst_element_factory_make_or_warn ("mad", "a_dec");
audiosink = gst_element_factory_make_or_warn (ASINK, "a_sink");
a_queue = gst_element_factory_make_or_warn ("queue", "a_queue");
gst_element_link (a_decoder, a_queue);
gst_element_link (a_queue, audiosink);
gst_bin_add (GST_BIN (audio_bin), a_decoder);
gst_bin_add (GST_BIN (audio_bin), a_queue);
gst_bin_add (GST_BIN (audio_bin), audiosink);
gst_element_set_state (audio_bin, GST_STATE_PAUSED);
setup_dynamic_link (demux, "audio_00", gst_element_get_pad (a_decoder,
"sink"), audio_bin);
seekable = gst_element_get_pad (a_queue, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (a_decoder, "sink"));
video_bin = gst_bin_new ("v_decoder_bin");
v_decoder = gst_element_factory_make_or_warn ("ffmpegdecall", "v_dec");
videosink = gst_element_factory_make_or_warn ("ximagesink", "v_sink");
v_queue = gst_element_factory_make_or_warn ("queue", "v_queue");
gst_element_link (v_decoder, v_queue);
gst_element_link (v_queue, videosink);
gst_bin_add (GST_BIN (video_bin), v_decoder);
gst_bin_add (GST_BIN (video_bin), v_queue);
gst_bin_add (GST_BIN (video_bin), videosink);
gst_element_set_state (video_bin, GST_STATE_PAUSED);
setup_dynamic_link (demux, "video_00", gst_element_get_pad (v_decoder,
"sink"), video_bin);
seekable = gst_element_get_pad (v_queue, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (v_decoder, "sink"));
return pipeline;
}
static GstElement *
make_mpeg_pipeline (const gchar * location)
{
GstElement *pipeline, *audio_bin, *video_bin;
GstElement *src, *demux, *a_decoder, *v_decoder, *v_filter;
GstElement *audiosink, *videosink;
GstElement *a_queue, *v_queue;
GstPad *seekable;
GstPad *pad;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
g_object_set (G_OBJECT (src), "location", location, NULL);
//demux = gst_element_factory_make_or_warn ("mpegdemux", "demux");
demux = gst_element_factory_make_or_warn ("flupsdemux", "demux");
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_element_link (src, demux);
audio_bin = gst_bin_new ("a_decoder_bin");
a_decoder = gst_element_factory_make_or_warn ("mad", "a_dec");
a_queue = gst_element_factory_make_or_warn ("queue", "a_queue");
audiosink = gst_element_factory_make_or_warn (ASINK, "a_sink");
gst_bin_add (GST_BIN (audio_bin), a_decoder);
gst_bin_add (GST_BIN (audio_bin), a_queue);
gst_bin_add (GST_BIN (audio_bin), audiosink);
gst_element_link (a_decoder, a_queue);
gst_element_link (a_queue, audiosink);
gst_bin_add (GST_BIN (pipeline), audio_bin);
pad = gst_element_get_pad (a_decoder, "sink");
gst_element_add_pad (audio_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, "audio_c0", gst_element_get_pad (audio_bin,
"sink"), NULL);
video_bin = gst_bin_new ("v_decoder_bin");
v_decoder = gst_element_factory_make_or_warn ("mpeg2dec", "v_dec");
v_queue = gst_element_factory_make_or_warn ("queue", "v_queue");
v_filter = gst_element_factory_make_or_warn ("ffmpegcolorspace", "v_filter");
videosink = gst_element_factory_make_or_warn (VSINK, "v_sink");
gst_bin_add (GST_BIN (video_bin), v_decoder);
gst_bin_add (GST_BIN (video_bin), v_queue);
gst_bin_add (GST_BIN (video_bin), v_filter);
gst_bin_add (GST_BIN (video_bin), videosink);
gst_element_link (v_decoder, v_queue);
gst_element_link (v_queue, v_filter);
gst_element_link (v_filter, videosink);
gst_bin_add (GST_BIN (pipeline), video_bin);
pad = gst_element_get_pad (v_decoder, "sink");
gst_element_add_pad (video_bin, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
setup_dynamic_link (demux, "video_e0", gst_element_get_pad (video_bin,
"sink"), NULL);
seekable = gst_element_get_pad (v_filter, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (v_decoder, "sink"));
return pipeline;
}
static GstElement *
make_mpegnt_pipeline (const gchar * location)
{
GstElement *pipeline, *audio_bin, *video_bin;
GstElement *src, *demux, *a_decoder, *v_decoder, *v_filter;
GstElement *audiosink, *videosink;
GstElement *a_queue;
GstPad *seekable;
pipeline = gst_pipeline_new ("app");
src = gst_element_factory_make_or_warn (SOURCE, "src");
g_object_set (G_OBJECT (src), "location", location, NULL);
demux = gst_element_factory_make_or_warn ("mpegdemux", "demux");
//g_object_set (G_OBJECT (demux), "sync", TRUE, NULL);
seekable_elements = g_list_prepend (seekable_elements, demux);
gst_bin_add (GST_BIN (pipeline), src);
gst_bin_add (GST_BIN (pipeline), demux);
gst_element_link (src, demux);
audio_bin = gst_bin_new ("a_decoder_bin");
a_decoder = gst_element_factory_make_or_warn ("mad", "a_dec");
a_queue = gst_element_factory_make_or_warn ("queue", "a_queue");
audiosink = gst_element_factory_make_or_warn (ASINK, "a_sink");
//g_object_set (G_OBJECT (audiosink), "fragment", 0x00180008, NULL);
g_object_set (G_OBJECT (audiosink), "sync", FALSE, NULL);
gst_element_link (a_decoder, a_queue);
gst_element_link (a_queue, audiosink);
gst_bin_add (GST_BIN (audio_bin), a_decoder);
gst_bin_add (GST_BIN (audio_bin), a_queue);
gst_bin_add (GST_BIN (audio_bin), audiosink);
setup_dynamic_link (demux, "audio_00", gst_element_get_pad (a_decoder,
"sink"), audio_bin);
seekable = gst_element_get_pad (a_queue, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (a_decoder, "sink"));
video_bin = gst_bin_new ("v_decoder_bin");
v_decoder = gst_element_factory_make_or_warn ("mpeg2dec", "v_dec");
v_filter = gst_element_factory_make_or_warn ("ffmpegcolorspace", "v_filter");
videosink = gst_element_factory_make_or_warn ("ximagesink", "v_sink");
gst_element_link_many (v_decoder, v_filter, videosink, NULL);
gst_bin_add_many (GST_BIN (video_bin), v_decoder, v_filter, videosink, NULL);
setup_dynamic_link (demux, "video_00", gst_element_get_pad (v_decoder,
"sink"), video_bin);
seekable = gst_element_get_pad (v_decoder, "src");
seekable_pads = g_list_prepend (seekable_pads, seekable);
rate_pads = g_list_prepend (rate_pads, seekable);
rate_pads =
g_list_prepend (rate_pads, gst_element_get_pad (v_decoder, "sink"));
return pipeline;
}
static GstElement *
make_playerbin_pipeline (const gchar * location)
{
GstElement *player;
player = gst_element_factory_make ("playbin", "player");
g_assert (player);
g_object_set (G_OBJECT (player), "uri", location, NULL);
seekable_elements = g_list_prepend (seekable_elements, player);
/* force element seeking on this pipeline */
elem_seek = TRUE;
return player;
}
static GstElement *
make_parselaunch_pipeline (const gchar * description)
{
GstElement *pipeline;
GError *error;
pipeline = gst_parse_launch (description, &error);
seekable_elements = g_list_prepend (seekable_elements, pipeline);
elem_seek = TRUE;
return pipeline;
}
static gchar *
format_value (GtkScale * scale, gdouble value)
{
gint64 real;
gint64 seconds;
gint64 subseconds;
real = value * duration / 100;
seconds = (gint64) real / GST_SECOND;
subseconds = (gint64) real / (GST_SECOND / 100);
return g_strdup_printf ("%02" G_GINT64_FORMAT ":%02" G_GINT64_FORMAT ":%02"
G_GINT64_FORMAT, seconds / 60, seconds % 60, subseconds % 100);
}
typedef struct
{
const gchar *name;
const GstFormat format;
}
seek_format;
static seek_format seek_formats[] = {
{"tim", GST_FORMAT_TIME},
{"byt", GST_FORMAT_BYTES},
{"buf", GST_FORMAT_BUFFERS},
{"def", GST_FORMAT_DEFAULT},
{NULL, 0},
};
G_GNUC_UNUSED static void
query_rates (void)
{
GList *walk = rate_pads;
while (walk) {
GstPad *pad = GST_PAD (walk->data);
gint i = 0;
g_print ("rate/sec %8.8s: ", GST_PAD_NAME (pad));
while (seek_formats[i].name) {
gint64 value;
GstFormat format;
format = seek_formats[i].format;
if (gst_pad_query_convert (pad, GST_FORMAT_TIME, GST_SECOND, &format,
&value)) {
g_print ("%s %13" G_GINT64_FORMAT " | ", seek_formats[i].name, value);
} else {
g_print ("%s %13.13s | ", seek_formats[i].name, "*NA*");
}
i++;
}
g_print (" %s:%s\n", GST_DEBUG_PAD_NAME (pad));
walk = g_list_next (walk);
}
}
G_GNUC_UNUSED static void
query_positions_elems ()
{
GList *walk = seekable_elements;
while (walk) {
GstElement *element = GST_ELEMENT (walk->data);
gint i = 0;
g_print ("positions %8.8s: ", GST_ELEMENT_NAME (element));
while (seek_formats[i].name) {
gint64 position, total;
GstFormat format;
format = seek_formats[i].format;
if (gst_element_query_position (element, &format, &position) &&
gst_element_query_duration (element, &format, &total)) {
g_print ("%s %13" G_GINT64_FORMAT " / %13" G_GINT64_FORMAT " | ",
seek_formats[i].name, position, total);
} else {
g_print ("%s %13.13s / %13.13s | ", seek_formats[i].name, "*NA*",
"*NA*");
}
i++;
}
g_print (" %s\n", GST_ELEMENT_NAME (element));
walk = g_list_next (walk);
}
}
G_GNUC_UNUSED static void
query_positions_pads ()
{
GList *walk = seekable_pads;
while (walk) {
GstPad *pad = GST_PAD (walk->data);
gint i = 0;
g_print ("positions %8.8s: ", GST_PAD_NAME (pad));
while (seek_formats[i].name) {
GstFormat format;
gint64 position, total;
format = seek_formats[i].format;
if (gst_pad_query_position (pad, &format, &position) &&
gst_pad_query_duration (pad, &format, &total)) {
g_print ("%s %13" G_GINT64_FORMAT " / %13" G_GINT64_FORMAT " | ",
seek_formats[i].name, position, total);
} else {
g_print ("%s %13.13s / %13.13s | ", seek_formats[i].name, "*NA*",
"*NA*");
}
i++;
}
g_print (" %s:%s\n", GST_DEBUG_PAD_NAME (pad));
walk = g_list_next (walk);
}
}
static gboolean
update_scale (gpointer data)
{
GstFormat format;
position = 0;
duration = 0;
format = GST_FORMAT_TIME;
if (elem_seek) {
if (seekable_elements) {
GstElement *element = GST_ELEMENT (seekable_elements->data);
gst_element_query_position (element, &format, &position);
gst_element_query_duration (element, &format, &duration);
}
} else {
if (seekable_pads) {
GstPad *pad = GST_PAD (seekable_pads->data);
gst_pad_query_position (pad, &format, &position);
gst_pad_query_duration (pad, &format, &duration);
}
}
if (stats) {
if (elem_seek) {
query_positions_elems ();
} else {
query_positions_pads ();
}
query_rates ();
}
if (position >= duration)
duration = position;
if (duration > 0) {
gtk_adjustment_set_value (adjustment, position * 100.0 / duration);
gtk_widget_queue_draw (hscale);
}
return TRUE;
}
static void do_seek (GtkWidget * widget);
#ifdef SCRUB
static gboolean
end_scrub (GtkWidget * widget)
{
gst_element_set_state (pipeline, GST_STATE_PAUSED);
seek_timeout_id = 0;
return FALSE;
}
#endif
static gboolean
send_event (GstEvent * event)
{
gboolean res = FALSE;
if (!elem_seek) {
GList *walk = seekable_pads;
while (walk) {
GstPad *seekable = GST_PAD (walk->data);
GST_DEBUG ("send event on pad %s:%s", GST_DEBUG_PAD_NAME (seekable));
gst_event_ref (event);
res = gst_pad_send_event (seekable, event);
walk = g_list_next (walk);
}
} else {
GList *walk = seekable_elements;
while (walk) {
GstElement *seekable = GST_ELEMENT (walk->data);
GST_DEBUG ("send event on element %s", GST_ELEMENT_NAME (seekable));
gst_event_ref (event);
res = gst_element_send_event (seekable, event);
walk = g_list_next (walk);
}
}
gst_event_unref (event);
return res;
}
static void
do_seek (GtkWidget * widget)
{
gint64 real;
gboolean res = FALSE;
GstEvent *s_event;
GstSeekFlags flags;
real = gtk_range_get_value (GTK_RANGE (widget)) * duration / 100;
flags = GST_SEEK_FLAG_FLUSH;
if (accurate_seek)
flags |= GST_SEEK_FLAG_ACCURATE;
if (keyframe_seek)
flags |= GST_SEEK_FLAG_KEY_UNIT;
if (loop_seek)
flags |= GST_SEEK_FLAG_SEGMENT;
s_event = gst_event_new_seek (1.0,
GST_FORMAT_TIME, flags, GST_SEEK_TYPE_SET, real, GST_SEEK_TYPE_NONE, 0);
GST_DEBUG ("seek to %" GST_TIME_FORMAT, GST_TIME_ARGS (real));
res = send_event (s_event);
if (res) {
gst_pipeline_set_new_stream_time (GST_PIPELINE (pipeline), 0);
gst_element_get_state (GST_ELEMENT (pipeline), NULL, NULL,
50 * GST_MSECOND);
} else
g_print ("seek failed\n");
}
static void
seek_cb (GtkWidget * widget)
{
#ifdef SCRUB
/* If the timer hasn't expired yet, then the pipeline is running */
if (seek_timeout_id != 0) {
gst_element_set_state (pipeline, GST_STATE_PAUSED);
}
#endif
do_seek (widget);
#ifdef SCRUB
gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (seek_timeout_id == 0) {
seek_timeout_id =
g_timeout_add (SCRUB_TIME, (GSourceFunc) end_scrub, widget);
}
#endif
}
static void
set_update_scale (gboolean active)
{
if (active) {
if (update_id == 0) {
update_id =
g_timeout_add (UPDATE_INTERVAL, (GtkFunction) update_scale, pipeline);
}
} else {
if (update_id) {
g_source_remove (update_id);
update_id = 0;
}
}
}
static gboolean
start_seek (GtkWidget * widget, GdkEventButton * event, gpointer user_data)
{
if (state == GST_STATE_PLAYING)
gst_element_set_state (pipeline, GST_STATE_PAUSED);
set_update_scale (FALSE);
if (changed_id == 0) {
changed_id = gtk_signal_connect (GTK_OBJECT (hscale),
"value_changed", G_CALLBACK (seek_cb), pipeline);
}
return FALSE;
}
static gboolean
stop_seek (GtkWidget * widget, gpointer user_data)
{
g_signal_handler_disconnect (GTK_OBJECT (hscale), changed_id);
changed_id = 0;
if (seek_timeout_id != 0) {
g_source_remove (seek_timeout_id);
seek_timeout_id = 0;
/* Still scrubbing, so the pipeline is already playing */
} else {
if (state == GST_STATE_PLAYING)
gst_element_set_state (pipeline, GST_STATE_PLAYING);
}
set_update_scale (TRUE);
return FALSE;
}
static void
play_cb (GtkButton * button, gpointer data)
{
GstStateChangeReturn ret;
if (state != GST_STATE_PLAYING) {
g_print ("PLAY pipeline\n");
ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE)
goto failed;
set_update_scale (TRUE);
state = GST_STATE_PLAYING;
}
return;
failed:
{
g_print ("PLAY failed\n");
}
}
static void
pause_cb (GtkButton * button, gpointer data)
{
GstStateChangeReturn ret;
if (state != GST_STATE_PAUSED) {
g_print ("PAUSE pipeline\n");
ret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto failed;
set_update_scale (FALSE);
state = GST_STATE_PAUSED;
}
return;
failed:
{
g_print ("PAUSE failed\n");
}
}
static void
stop_cb (GtkButton * button, gpointer data)
{
GstStateChangeReturn ret;
if (state != GST_STATE_READY) {
g_print ("READY pipeline\n");
ret = gst_element_set_state (pipeline, GST_STATE_READY);
if (ret == GST_STATE_CHANGE_FAILURE)
goto failed;
gtk_adjustment_set_value (adjustment, 0.0);
set_update_scale (FALSE);
state = GST_STATE_READY;
}
return;
failed:
{
g_print ("READY failed\n");
}
}
static void
accurate_toggle_cb (GtkToggleButton * button, GstPipeline * pipeline)
{
accurate_seek = gtk_toggle_button_get_active (button);
}
static void
key_toggle_cb (GtkToggleButton * button, GstPipeline * pipeline)
{
keyframe_seek = gtk_toggle_button_get_active (button);
}
static void
loop_toggle_cb (GtkToggleButton * button, GstPipeline * pipeline)
{
loop_seek = gtk_toggle_button_get_active (button);
}
static void
segment_done (GstBus * bus, GstMessage * message, GstPipeline * pipeline)
{
GstEvent *event;
GstSeekFlags flags;
gboolean res;
flags = 0;
if (loop_seek)
flags |= GST_SEEK_FLAG_SEGMENT;
event = gst_event_new_seek (1.0,
GST_FORMAT_TIME, flags, GST_SEEK_TYPE_SET, 0, GST_SEEK_TYPE_NONE, 0);
GST_DEBUG ("segmeent seek to start");
res = send_event (event);
if (!res) {
g_print ("segment seek failed\n");
}
}
static void
message_received (GstBus * bus, GstMessage * message, GstPipeline * pipeline)
{
const GstStructure *s;
s = gst_message_get_structure (message);
g_print ("message from \"%s\" (%s): ",
GST_STR_NULL (GST_ELEMENT_NAME (GST_MESSAGE_SRC (message))),
gst_message_type_get_name (GST_MESSAGE_TYPE (message)));
if (s) {
gchar *sstr;
sstr = gst_structure_to_string (s);
g_print ("%s\n", sstr);
g_free (sstr);
} else {
g_print ("no message details\n");
}
}
typedef struct
{
gchar *name;
GstElement *(*func) (const gchar * location);
}
Pipeline;
static Pipeline pipelines[] = {
{"mp3", make_mp3_pipeline},
{"avi", make_avi_pipeline},
{"mpeg1", make_mpeg_pipeline},
{"mpegparse", make_parse_pipeline},
{"vorbis", make_vorbis_pipeline},
{"theora", make_theora_pipeline},
{"ogg/v/t", make_vorbis_theora_pipeline},
{"avi/msmpeg4v3/mp3", make_avi_msmpeg4v3_mp3_pipeline},
{"sid", make_sid_pipeline},
{"flac", make_flac_pipeline},
{"wav", make_wav_pipeline},
{"mod", make_mod_pipeline},
{"dv", make_dv_pipeline},
{"mpeg1nothreads", make_mpegnt_pipeline},
{"playerbin", make_playerbin_pipeline},
{"parse-launch", make_parselaunch_pipeline},
{NULL, NULL},
};
#define NUM_TYPES ((sizeof (pipelines) / sizeof (Pipeline)) - 1)
static void
print_usage (int argc, char **argv)
{
gint i;
g_print ("usage: %s <type> <filename>\n", argv[0]);
g_print (" possible types:\n");
for (i = 0; i < NUM_TYPES; i++) {
g_print (" %d = %s\n", i, pipelines[i].name);
}
}
int
main (int argc, char **argv)
{
GtkWidget *window, *hbox, *vbox, *play_button, *pause_button, *stop_button;
GtkWidget *accurate_checkbox, *key_checkbox, *loop_checkbox;
GOptionEntry options[] = {
{"stats", 's', 0, G_OPTION_ARG_NONE, &stats,
"Show pad stats", NULL},
{"elem", 'e', 0, G_OPTION_ARG_NONE, &elem_seek,
"Seek on elements instead of pads", NULL},
{"verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose,
"Verbose properties", NULL},
{NULL}
};
gint type;
GOptionContext *ctx;
GError *err = NULL;
ctx = g_option_context_new ("seek");
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)) {
g_print ("Error initializing: %s\n", err->message);
exit (1);
}
GST_DEBUG_CATEGORY_INIT (seek_debug, "seek", 0, "seek example");
gtk_init (&argc, &argv);
if (argc != 3) {
print_usage (argc, argv);
exit (-1);
}
type = atoi (argv[1]);
if (type < 0 || type >= NUM_TYPES) {
print_usage (argc, argv);
exit (-1);
}
pipeline = pipelines[type].func (argv[2]);
g_assert (pipeline);
/* initialize gui elements ... */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
hbox = gtk_hbox_new (FALSE, 0);
vbox = gtk_vbox_new (FALSE, 0);
play_button = gtk_button_new_with_label ("play");
pause_button = gtk_button_new_with_label ("pause");
stop_button = gtk_button_new_with_label ("stop");
accurate_checkbox = gtk_check_button_new_with_label ("Accurate Seek");
key_checkbox = gtk_check_button_new_with_label ("Key_unit Seek");
loop_checkbox = gtk_check_button_new_with_label ("Loop");
adjustment =
GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.00, 100.0, 0.1, 1.0, 1.0));
hscale = gtk_hscale_new (adjustment);
gtk_scale_set_digits (GTK_SCALE (hscale), 2);
gtk_range_set_update_policy (GTK_RANGE (hscale), GTK_UPDATE_CONTINUOUS);
gtk_signal_connect (GTK_OBJECT (hscale),
"button_press_event", G_CALLBACK (start_seek), pipeline);
gtk_signal_connect (GTK_OBJECT (hscale),
"button_release_event", G_CALLBACK (stop_seek), pipeline);
gtk_signal_connect (GTK_OBJECT (hscale),
"format_value", G_CALLBACK (format_value), pipeline);
/* do the packing stuff ... */
gtk_window_set_default_size (GTK_WINDOW (window), 250, 96);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_container_add (GTK_CONTAINER (vbox), hbox);
gtk_box_pack_start (GTK_BOX (hbox), play_button, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), pause_button, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), stop_button, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), accurate_checkbox, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), key_checkbox, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), loop_checkbox, FALSE, FALSE, 2);
gtk_box_pack_start (GTK_BOX (vbox), hscale, TRUE, TRUE, 2);
/* connect things ... */
g_signal_connect (G_OBJECT (play_button), "clicked", G_CALLBACK (play_cb),
pipeline);
g_signal_connect (G_OBJECT (pause_button), "clicked", G_CALLBACK (pause_cb),
pipeline);
g_signal_connect (G_OBJECT (stop_button), "clicked", G_CALLBACK (stop_cb),
pipeline);
g_signal_connect (G_OBJECT (accurate_checkbox), "toggled",
G_CALLBACK (accurate_toggle_cb), pipeline);
g_signal_connect (G_OBJECT (key_checkbox), "toggled",
G_CALLBACK (key_toggle_cb), pipeline);
g_signal_connect (G_OBJECT (loop_checkbox), "toggled",
G_CALLBACK (loop_toggle_cb), pipeline);
g_signal_connect (G_OBJECT (window), "delete_event", gtk_main_quit, NULL);
/* show the gui. */
gtk_widget_show_all (window);
if (verbose) {
g_signal_connect (pipeline, "deep_notify",
G_CALLBACK (gst_object_default_deep_notify), NULL);
}
{
GstBus *bus;
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_signal_watch (bus);
// g_signal_connect (bus, "message::state-changed", (GCallback) message_received, pipeline);
g_signal_connect (bus, "message::new-clock", (GCallback) message_received,
pipeline);
g_signal_connect (bus, "message::error", (GCallback) message_received,
pipeline);
g_signal_connect (bus, "message::warning", (GCallback) message_received,
pipeline);
g_signal_connect (bus, "message::eos", (GCallback) message_received,
pipeline);
g_signal_connect (bus, "message::segment-done",
(GCallback) message_received, pipeline);
g_signal_connect (bus, "message::segment-done", (GCallback) segment_done,
pipeline);
}
gtk_main ();
g_print ("NULL pipeline\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
g_print ("free pipeline\n");
gst_object_unref (pipeline);
return 0;
}