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/* GStreamer
* (c) 2005 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* gstid3demuxbin.c: hack around autoplugging.
*
* 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.
*/
#ifdef HAVE_CONFIG_G
#include "config.h"
#endif
#include <gst/gst.h>
#define GST_TYPE_ID3DEMUX_BIN \
(gst_id3demux_bin_get_type())
#define GST_ID3DEMUX_BIN(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_ID3DEMUX_BIN, \
GstId3DemuxBin))
#define GST_ID3DEMUX_BIN_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_ID3DEMUX_BIN, \
GstId3DemuxBinClass))
#define GST_IS_ID3DEMUX_BIN(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_ID3DEMUX_BIN))
#define GST_IS_ID3DEMUX_BIN_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_ID3DEMUX_BIN))
typedef struct _GstId3DemuxBin
{
GstBin parent;
/* ghost pads */
GstPad *srcpad;
/* kids */
GstElement *demux, *typefind;
} GstId3DemuxBin;
typedef struct _GstId3DemuxBinClass
{
GstBinClass parent;
} GstId3DemuxBinClass;
static GstStaticPadTemplate id3demux_bin_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("ANY")
);
static GstStaticPadTemplate id3demux_bin_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-id3")
);
static void gst_id3demux_bin_class_init (GstId3DemuxBinClass * klass);
static void gst_id3demux_bin_base_init (GstId3DemuxBinClass * klass);
static void gst_id3demux_bin_init (GstId3DemuxBin * manager);
static void found_type (GstElement * element, guint probability,
const GstCaps * caps, gpointer data);
static GstElementStateReturn gst_id3demux_bin_change_state (GstElement *
element);
static GstBinClass *parent_class;
GType
gst_id3demux_bin_get_type (void)
{
static GType gst_id3demux_bin_type = 0;
if (!gst_id3demux_bin_type) {
static const GTypeInfo gst_id3demux_bin_info = {
sizeof (GstId3DemuxBinClass),
(GBaseInitFunc) gst_id3demux_bin_base_init,
NULL,
(GClassInitFunc) gst_id3demux_bin_class_init,
NULL,
NULL,
sizeof (GstId3DemuxBin),
0,
(GInstanceInitFunc) gst_id3demux_bin_init,
NULL
};
gst_id3demux_bin_type =
g_type_register_static (GST_TYPE_BIN,
"GstId3DemuxBin", &gst_id3demux_bin_info, 0);
}
return gst_id3demux_bin_type;
}
static void
gst_id3demux_bin_base_init (GstId3DemuxBinClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static GstElementDetails gst_id3demux_bin_details =
GST_ELEMENT_DETAILS ("ID3-demux bin",
"Codec/Demuxer/Audio",
"Manages typefinding for an ID3 demuxer",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
gst_element_class_set_details (element_class, &gst_id3demux_bin_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&id3demux_bin_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&id3demux_bin_sink_template));
}
static void
gst_id3demux_bin_class_init (GstId3DemuxBinClass * klass)
{
parent_class = g_type_class_ref (GST_TYPE_BIN);
GST_ELEMENT_CLASS (klass)->change_state = gst_id3demux_bin_change_state;
}
static void
gst_id3demux_bin_init (GstId3DemuxBin * id3)
{
id3->demux = gst_element_factory_make ("id3demux", NULL);
id3->typefind = gst_element_factory_make ("typefind", NULL);
g_signal_connect (id3->typefind, "have-type", G_CALLBACK (found_type), id3);
gst_pad_use_explicit_caps (gst_element_get_pad (id3->typefind, "src"));
gst_element_add_ghost_pad (GST_ELEMENT (id3),
gst_element_get_pad (id3->demux, "sink"), "sink");
gst_bin_add_many (GST_BIN (id3), id3->demux, id3->typefind, NULL);
gst_element_link (id3->demux, id3->typefind);
}
static void
gst_id3demux_bin_remove_pad (GstId3DemuxBin * id3)
{
if (id3->srcpad) {
gst_element_remove_pad (GST_ELEMENT (id3), id3->srcpad);
id3->srcpad = NULL;
}
}
static void
found_type (GstElement * element, guint probability,
const GstCaps * caps, gpointer data)
{
GstId3DemuxBin *id3 = GST_ID3DEMUX_BIN (data);
/* get rid of old */
gst_id3demux_bin_remove_pad (id3);
GST_LOG ("Found type");
/* add new */
if (!gst_pad_set_explicit_caps (gst_element_get_pad (id3->typefind,
"src"), caps)) {
GST_ELEMENT_ERROR (id3, CORE, NEGOTIATION, (NULL), (NULL));
return;
}
id3->srcpad = gst_ghost_pad_new ("src",
gst_element_get_pad (id3->typefind, "src"));
gst_element_add_pad (GST_ELEMENT (id3), id3->srcpad);
}
static GstElementStateReturn
gst_id3demux_bin_change_state (GstElement * element)
{
GstId3DemuxBin *id3 = GST_ID3DEMUX_BIN (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
gst_id3demux_bin_remove_pad (id3);
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
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