mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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e3ddfa2c41
Original commit message from CVS: * gst/playback/gstdecodebin.c: (gst_decode_bin_init), (find_compatibles), (close_pad_link), (try_to_link_1), (no_more_pads), (close_link), (type_found): * gst/playback/gstplaybasebin.c: (new_decoded_pad): * gst/playback/gstplaybin.c: (gen_video_element), (gen_audio_element): Set state on newly added element to READY so that negotiation can happen ASAP. Addes some more debug info. Do not try to plug pads with multiple caps structures or ANY because it is too dangerous since we do not do dynamic replugging.
766 lines
24 KiB
C
766 lines
24 KiB
C
/* GStreamer
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* Copyright (C) <2004> Wim Taymans <wim@fluendo.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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <gst/gst.h>
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/* generic templates */
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GstStaticPadTemplate decoder_bin_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GstStaticPadTemplate decoder_bin_src_template =
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GST_STATIC_PAD_TEMPLATE ("src%d",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS_ANY);
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GST_DEBUG_CATEGORY_STATIC (gst_decode_bin_debug);
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#define GST_CAT_DEFAULT gst_decode_bin_debug
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#define GST_TYPE_DECODE_BIN (gst_decode_bin_get_type())
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#define GST_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DECODE_BIN,GstDecodeBin))
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#define GST_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DECODE_BIN,GstDecodeBinClass))
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#define GST_IS_DECODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DECODE_BIN))
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#define GST_IS_DECODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DECODE_BIN))
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typedef struct _GstDecodeBin GstDecodeBin;
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typedef struct _GstDecodeBinClass GstDecodeBinClass;
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struct _GstDecodeBin
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{
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GstBin bin; /* we extend GstBin */
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GstElement *typefind; /* this holds the typefind object */
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gboolean threaded; /* indicating threaded execution is desired */
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GList *dynamics; /* list of dynamic connections */
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GList *factories; /* factories we can use for selecting elements */
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gint numpads;
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GList *elements; /* elements we added in autoplugging */
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guint have_type_id; /* signal id for the typefind element */
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};
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struct _GstDecodeBinClass
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{
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GstBinClass parent_class;
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/* signal we fire when a new pad has been decoded into raw audio/video */
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void (*new_decoded_pad) (GstElement * element, GstPad * pad, gboolean last);
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/* signal fired when we found a pad that we cannot decode */
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void (*unknown_type) (GstElement * element, GstCaps * caps);
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};
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/* props */
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enum
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{
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ARG_0,
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ARG_THREADED,
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};
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/* signals */
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enum
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{
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SIGNAL_NEW_DECODED_PAD,
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SIGNAL_UNKNOWN_TYPE,
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LAST_SIGNAL
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};
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/* this structure is created for all dynamic pads that could get created
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* at runtime */
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typedef struct
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{
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gint np_sig_id; /* signal id of new_pad */
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gint nmp_sig_id; /* signal id of no_more_pads */
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GstElement *element; /* the element sending the signal */
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GstDecodeBin *decode_bin; /* pointer to ourself */
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}
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GstDynamic;
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static void gst_decode_bin_class_init (GstDecodeBinClass * klass);
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static void gst_decode_bin_init (GstDecodeBin * decode_bin);
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static void gst_decode_bin_dispose (GObject * object);
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static void gst_decode_bin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * spec);
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static void gst_decode_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * spec);
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static GstElementStateReturn gst_decode_bin_change_state (GstElement * element);
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static void type_found (GstElement * typefind, guint probability,
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GstCaps * caps, GstDecodeBin * decode_bin);
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static GstElement *try_to_link_1 (GstDecodeBin * decode_bin, GstPad * pad,
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GList * factories);
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static void close_link (GstElement * element, GstDecodeBin * decode_bin);
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static void close_pad_link (GstElement * element, GstPad * pad,
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GstCaps * caps, GstDecodeBin * decode_bin);
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static GstElementClass *parent_class;
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static guint gst_decode_bin_signals[LAST_SIGNAL] = { 0 };
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static GstElementDetails gst_decode_bin_details = {
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"Decoder Bin",
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"Generic/Bin/Decoder",
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"Autoplug and decode to raw media",
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"Wim Taymans <wim@fluendo.com>"
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};
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static GType
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gst_decode_bin_get_type (void)
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{
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static GType gst_decode_bin_type = 0;
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if (!gst_decode_bin_type) {
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static const GTypeInfo gst_decode_bin_info = {
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sizeof (GstDecodeBinClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_decode_bin_class_init,
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NULL,
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NULL,
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sizeof (GstDecodeBin),
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0,
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(GInstanceInitFunc) gst_decode_bin_init,
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NULL
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};
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gst_decode_bin_type =
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g_type_register_static (GST_TYPE_BIN, "GstDecodeBin",
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&gst_decode_bin_info, 0);
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}
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return gst_decode_bin_type;
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}
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static void
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gst_decode_bin_class_init (GstDecodeBinClass * klass)
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{
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GObjectClass *gobject_klass;
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GstElementClass *gstelement_klass;
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GstBinClass *gstbin_klass;
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gobject_klass = (GObjectClass *) klass;
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gstelement_klass = (GstElementClass *) klass;
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gstbin_klass = (GstBinClass *) klass;
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parent_class = g_type_class_ref (gst_bin_get_type ());
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gobject_klass->set_property = gst_decode_bin_set_property;
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gobject_klass->get_property = gst_decode_bin_get_property;
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g_object_class_install_property (gobject_klass, ARG_THREADED,
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g_param_spec_boolean ("threaded", "Threaded", "Use threads",
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FALSE, G_PARAM_READWRITE));
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gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD] =
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g_signal_new ("new-decoded-pad", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstDecodeBinClass, new_decoded_pad), NULL, NULL,
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gst_marshal_VOID__OBJECT_POINTER, G_TYPE_NONE, 2, G_TYPE_OBJECT,
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G_TYPE_BOOLEAN);
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gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] =
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g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstDecodeBinClass, unknown_type),
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NULL, NULL, gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_CAPS);
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gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_decode_bin_dispose);
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gst_element_class_add_pad_template (gstelement_klass,
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gst_static_pad_template_get (&decoder_bin_src_template));
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gst_element_class_set_details (gstelement_klass, &gst_decode_bin_details);
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gstelement_klass->change_state =
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GST_DEBUG_FUNCPTR (gst_decode_bin_change_state);
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}
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/* check if the bin is dynamic.
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*
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* If there are no outstanding dynamic connections, the bin is
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* considered to be non-dynamic.
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*/
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static gboolean
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gst_decode_bin_is_dynamic (GstDecodeBin * decode_bin)
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{
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return decode_bin->dynamics != NULL;
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}
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/* the filter function for selecting the elements we can use in
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* autoplugging */
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static gboolean
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gst_decode_bin_factory_filter (GstPluginFeature * feature,
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GstDecodeBin * decode_bin)
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{
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guint rank;
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const gchar *klass;
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/* we only care about element factories */
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if (!GST_IS_ELEMENT_FACTORY (feature))
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return FALSE;
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klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
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/* only demuxers and decoders can play */
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if (strstr (klass, "Demux") == NULL && strstr (klass, "Decoder") == NULL) {
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return FALSE;
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}
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/* only select elements with autoplugging rank */
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rank = gst_plugin_feature_get_rank (feature);
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if (rank < GST_RANK_MARGINAL)
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return FALSE;
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return TRUE;
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}
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/* function used to sort element features */
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static gint
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compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
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{
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return gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
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}
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static void
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print_feature (GstPluginFeature * feature)
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{
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GST_DEBUG ("%s", gst_plugin_feature_get_name (feature));
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}
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static void
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gst_decode_bin_init (GstDecodeBin * decode_bin)
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{
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GList *factories;
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/* first filter out the interesting element factories */
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factories = gst_registry_pool_feature_filter (
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(GstPluginFeatureFilter) gst_decode_bin_factory_filter,
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FALSE, decode_bin);
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/* sort them according to their ranks */
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decode_bin->factories = g_list_sort (factories, (GCompareFunc) compare_ranks);
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/* do some debugging */
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g_list_foreach (decode_bin->factories, (GFunc) print_feature, NULL);
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/* we create the typefind element only once */
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decode_bin->typefind = gst_element_factory_make ("typefind", "typefind");
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if (!decode_bin->typefind) {
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g_warning ("can't find typefind element, decodebin will not work");
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} else {
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/* add the typefind element */
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gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind);
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/* ghost the sink pad to ourself */
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gst_element_add_ghost_pad (GST_ELEMENT (decode_bin),
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gst_element_get_pad (decode_bin->typefind, "sink"), "sink");
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/* connect a signal to find out when the typefind element found
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* a type */
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decode_bin->have_type_id =
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g_signal_connect (G_OBJECT (decode_bin->typefind), "have_type",
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G_CALLBACK (type_found), decode_bin);
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}
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decode_bin->dynamics = NULL;
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}
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static void
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gst_decode_bin_dispose (GObject * object)
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{
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GstDecodeBin *decode_bin;
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GList *dyns;
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decode_bin = GST_DECODE_BIN (object);
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g_signal_handler_disconnect (G_OBJECT (decode_bin->typefind),
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decode_bin->have_type_id);
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gst_bin_remove (GST_BIN (decode_bin), decode_bin->typefind);
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g_list_free (decode_bin->factories);
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for (dyns = decode_bin->dynamics; dyns; dyns = g_list_next (dyns)) {
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GstDynamic *dynamic = (GstDynamic *) dyns->data;
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g_free (dynamic);
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}
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g_list_free (decode_bin->dynamics);
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decode_bin->dynamics = NULL;
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if (G_OBJECT_CLASS (parent_class)->dispose) {
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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}
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/* this function runs through the element factories and returns a list
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* of all elements that are able to sink the given caps
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*/
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static GList *
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find_compatibles (GstDecodeBin * decode_bin, const GstCaps * caps)
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{
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GList *factories;
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GList *to_try = NULL;
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/* loop over all the factories */
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for (factories = decode_bin->factories; factories;
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factories = g_list_next (factories)) {
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GstElementFactory *factory = GST_ELEMENT_FACTORY (factories->data);
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const GList *templates;
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GList *walk;
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/* get the templates from the element factory */
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templates = gst_element_factory_get_pad_templates (factory);
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for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
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GstPadTemplate *templ = GST_PAD_TEMPLATE (walk->data);
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/* we only care about the sink templates */
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if (templ->direction == GST_PAD_SINK) {
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GstCaps *intersect;
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/* try to intersect the caps with the caps of the template */
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intersect =
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gst_caps_intersect (caps, gst_pad_template_get_caps (templ));
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/* check if the intersection is empty */
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if (!gst_caps_is_empty (intersect)) {
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/* non empty intersection, we can use this element */
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to_try = g_list_append (to_try, factory);
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}
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gst_caps_free (intersect);
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}
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}
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}
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return to_try;
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}
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/* given a pad and a caps from an element, find the list of elements
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* that could connect to the pad
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*
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* If the pad has a raw format, this function will create a ghostpad
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* for the pad onto the decodebin.
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*
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* If no compatible elements could be found, this function will signal
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* the unknown_type signal.
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*/
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static void
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close_pad_link (GstElement * element, GstPad * pad, GstCaps * caps,
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GstDecodeBin * decode_bin)
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{
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GList *to_try;
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GstStructure *structure;
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const gchar *mimetype;
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/* the caps is empty, this means the pad has no type, we can only
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* decide to fire the unknown_type signal. */
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if (gst_caps_is_empty (caps)) {
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g_signal_emit (G_OBJECT (decode_bin),
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gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, caps);
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return;
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}
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/* the caps is any, this means the pad can be anything and
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* we don't know yet */
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if (gst_caps_is_any (caps)) {
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return;
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}
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GST_LOG_OBJECT (element, "trying to close %" GST_PTR_FORMAT, caps);
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/* FIXME, iterate over more structures? */
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structure = gst_caps_get_structure (caps, 0);
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mimetype = gst_structure_get_name (structure);
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/* first see if this is raw. If the type is raw, we can
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* create a ghostpad for this pad. */
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if (g_str_has_prefix (mimetype, "video/x-raw") ||
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g_str_has_prefix (mimetype, "audio/x-raw")) {
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gchar *padname;
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GstPad *ghost;
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gboolean dynamic;
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/* make a unique name for this new pad */
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padname = g_strdup_printf ("src%d", decode_bin->numpads);
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decode_bin->numpads++;
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/* make it a ghostpad */
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ghost = gst_element_add_ghost_pad (GST_ELEMENT (decode_bin), pad, padname);
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/* see if any more pending dynamic connections exist */
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dynamic = gst_decode_bin_is_dynamic (decode_bin);
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GST_LOG_OBJECT (element, "closed pad %s", padname);
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/* our own signal with an extra flag that this is the only pad */
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g_signal_emit (G_OBJECT (decode_bin),
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gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD], 0, ghost, !dynamic);
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g_free (padname);
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return;
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}
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if (gst_caps_get_size (caps) == 1) {
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/* then continue plugging, first find all compatible elements */
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to_try = find_compatibles (decode_bin, caps);
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if (to_try == NULL) {
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/* no compatible elements, fire the unknown_type signal, we cannot go
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* on */
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g_signal_emit (G_OBJECT (decode_bin),
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gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, caps);
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return;
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}
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try_to_link_1 (decode_bin, pad, to_try);
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} else {
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GST_LOG_OBJECT (element, "multiple possibilities, delaying");
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g_warning ("multiple possibilities, delaying");
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}
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}
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/* given a list of element factories, try to link one of the factories
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* to the given pad */
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static GstElement *
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try_to_link_1 (GstDecodeBin * decode_bin, GstPad * pad, GList * factories)
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{
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GList *walk;
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/* loop over the factories */
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for (walk = factories; walk; walk = g_list_next (walk)) {
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GstElementFactory *factory = GST_ELEMENT_FACTORY (walk->data);
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GstElement *element;
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gboolean ret;
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GST_DEBUG_OBJECT (decode_bin, "trying to link %s",
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gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
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/* make an element from the factory first */
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element = gst_element_factory_create (factory, NULL);
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if (element == NULL) {
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/* hmm, strange */
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GST_WARNING_OBJECT (decode_bin, "could not create an element from %s",
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gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
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continue;
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}
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/* now add the element to the bin first */
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GST_DEBUG_OBJECT (decode_bin, "adding %s", gst_element_get_name (element));
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gst_bin_add (GST_BIN (decode_bin), element);
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gst_element_set_state (element, GST_STATE_READY);
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|
|
/* keep out own list of elements */
|
|
decode_bin->elements = g_list_prepend (decode_bin->elements, element);
|
|
|
|
/* try to link the given pad to a sinkpad */
|
|
/* FIXME, find the sinkpad by looping over the pads instead of
|
|
* looking it up by name */
|
|
ret = gst_pad_link (pad, gst_element_get_pad (element, "sink"));
|
|
if (ret) {
|
|
const gchar *klass;
|
|
GstElementFactory *factory;
|
|
|
|
/* The link worked, now figure out what it was that we connected */
|
|
factory = gst_element_get_factory (element);
|
|
klass = gst_element_factory_get_klass (factory);
|
|
/* check if we can use threads */
|
|
if (decode_bin->threaded) {
|
|
if (strstr (klass, "Demux") != NULL) {
|
|
/* FIXME, do something with threads here */
|
|
}
|
|
}
|
|
|
|
/* now that we added the element we can try to continue autoplugging
|
|
* on it until we have a raw type */
|
|
close_link (element, decode_bin);
|
|
/* change the state of the element to that of the parent */
|
|
gst_element_sync_state_with_parent (element);
|
|
return element;
|
|
} else {
|
|
/* this element did not work, remove it again and continue trying
|
|
* other elements */
|
|
gst_bin_remove (GST_BIN (decode_bin), element);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* This function will be called when a dynamic pad is created on an element.
|
|
* We try to continue autoplugging on this new pad. */
|
|
static void
|
|
new_pad (GstElement * element, GstPad * pad, GstDynamic * dynamic)
|
|
{
|
|
close_pad_link (element, pad, gst_pad_get_caps (pad), dynamic->decode_bin);
|
|
}
|
|
|
|
/* this signal is fired when an element signals the no_more_pads signal.
|
|
* This means that the element will not generate more dynamic pads and
|
|
* we can remove the element from the list of dynamic elements. When we
|
|
* have no more dynamic elements in the pipeline, we can fire a no_more_pads
|
|
* signal ourselves. */
|
|
static void
|
|
no_more_pads (GstElement * element, GstDynamic * dynamic)
|
|
{
|
|
GstDecodeBin *decode_bin = dynamic->decode_bin;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "no more pads on element %s",
|
|
gst_element_get_name (element));
|
|
|
|
/* disconnect signals */
|
|
g_signal_handler_disconnect (G_OBJECT (dynamic->element), dynamic->np_sig_id);
|
|
g_signal_handler_disconnect (G_OBJECT (dynamic->element),
|
|
dynamic->nmp_sig_id);
|
|
|
|
/* remove the element from the list of dynamic elements */
|
|
decode_bin->dynamics = g_list_remove (decode_bin->dynamics, dynamic);
|
|
g_free (dynamic);
|
|
|
|
/* if we have no more dynamic elements, we have no change of creating
|
|
* more pads, so we fire the no_more_pads signal */
|
|
if (decode_bin->dynamics == NULL) {
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"no more dynamic elements, signaling no_more_pads");
|
|
gst_element_no_more_pads (GST_ELEMENT (decode_bin));
|
|
} else {
|
|
GST_DEBUG_OBJECT (decode_bin, "we have more dynamic elements");
|
|
}
|
|
}
|
|
|
|
/* this function inspects the given element and tries to connect something
|
|
* on the srcpads. If there are dynamic pads, it sets up a signal handler to
|
|
* continue autoplugging when they become available */
|
|
static void
|
|
close_link (GstElement * element, GstDecodeBin * decode_bin)
|
|
{
|
|
GList *pads;
|
|
gboolean dynamic = FALSE;
|
|
GList *to_connect = NULL;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "closing links with element %s",
|
|
gst_element_get_name (element));
|
|
|
|
/* loop over all the padtemplates */
|
|
for (pads = gst_element_get_pad_template_list (element); pads;
|
|
pads = g_list_next (pads)) {
|
|
GstPadTemplate *templ = GST_PAD_TEMPLATE (pads->data);
|
|
const gchar *templ_name;
|
|
|
|
/* we are only interested in source pads */
|
|
if (GST_PAD_TEMPLATE_DIRECTION (templ) != GST_PAD_SRC)
|
|
continue;
|
|
|
|
templ_name = GST_PAD_TEMPLATE_NAME_TEMPLATE (templ);
|
|
GST_DEBUG_OBJECT (decode_bin, "got a source pad template %s", templ_name);
|
|
|
|
/* figure out what kind of pad this is */
|
|
switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
|
|
case GST_PAD_ALWAYS:
|
|
{
|
|
/* get the pad that we need to autoplug */
|
|
GstPad *pad = gst_element_get_pad (element, templ_name);
|
|
|
|
if (pad) {
|
|
GST_DEBUG_OBJECT (decode_bin, "got the pad for always template %s",
|
|
templ_name);
|
|
/* here is the pad, we need to autoplug it */
|
|
to_connect = g_list_prepend (to_connect, pad);
|
|
} else {
|
|
/* strange, pad is marked as always but it's not
|
|
* there. Fix the element */
|
|
GST_WARNING_OBJECT (decode_bin,
|
|
"could not get the pad for always template %s", templ_name);
|
|
}
|
|
break;
|
|
}
|
|
case GST_PAD_SOMETIMES:
|
|
{
|
|
/* try to get the pad to see if it is already created or
|
|
* not */
|
|
GstPad *pad = gst_element_get_pad (element, templ_name);
|
|
|
|
if (pad) {
|
|
GST_DEBUG_OBJECT (decode_bin, "got the pad for sometimes template %s",
|
|
templ_name);
|
|
/* the pad is created, we need to autoplug it */
|
|
to_connect = g_list_prepend (to_connect, pad);
|
|
} else {
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"did not get the sometimes pad of template %s", templ_name);
|
|
/* we have an element that will create dynamic pads */
|
|
dynamic = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
case GST_PAD_REQUEST:
|
|
/* ignore request pads */
|
|
GST_DEBUG_OBJECT (decode_bin, "ignoring request padtemplate %s",
|
|
templ_name);
|
|
break;
|
|
}
|
|
}
|
|
if (dynamic) {
|
|
GstDynamic *dyn;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "got a dynamic element here");
|
|
/* ok, this element has dynamic pads, set up the signal handlers to be
|
|
* notified of them */
|
|
dyn = g_new0 (GstDynamic, 1);
|
|
dyn->np_sig_id = g_signal_connect (G_OBJECT (element), "new-pad",
|
|
G_CALLBACK (new_pad), dyn);
|
|
dyn->nmp_sig_id = g_signal_connect (G_OBJECT (element), "no-more-pads",
|
|
G_CALLBACK (no_more_pads), dyn);
|
|
dyn->element = element;
|
|
dyn->decode_bin = decode_bin;
|
|
|
|
/* and add this element to the dynamic elements */
|
|
decode_bin->dynamics = g_list_prepend (decode_bin->dynamics, dyn);
|
|
}
|
|
|
|
/* now loop over all the pads we need to connect */
|
|
for (pads = to_connect; pads; pads = g_list_next (pads)) {
|
|
GstPad *pad = GST_PAD (pads->data);
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "closing pad link for %s",
|
|
gst_pad_get_name (pad));
|
|
|
|
/* continue autoplugging on the pads */
|
|
close_pad_link (element, pad, gst_pad_get_caps (pad), decode_bin);
|
|
}
|
|
g_list_free (to_connect);
|
|
}
|
|
|
|
/* this is the signal handler for the typefind element have_type signal.
|
|
* It tries to continue autoplugging on the typefind src pad */
|
|
static void
|
|
type_found (GstElement * typefind, guint probability, GstCaps * caps,
|
|
GstDecodeBin * decode_bin)
|
|
{
|
|
gboolean dynamic;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "typefind found caps %" GST_PTR_FORMAT, caps);
|
|
|
|
/* autoplug the new pad with the caps that the signal gave us */
|
|
close_pad_link (typefind, gst_element_get_pad (typefind, "src"), caps,
|
|
decode_bin);
|
|
|
|
dynamic = gst_decode_bin_is_dynamic (decode_bin);
|
|
if (dynamic == FALSE) {
|
|
GST_DEBUG_OBJECT (decode_bin, "we have no dynamic elements anymore");
|
|
/* if we have no dynamic elements, we know that no new pads
|
|
* will be created and we can signal out no_more_pads signal */
|
|
gst_element_no_more_pads (GST_ELEMENT (decode_bin));
|
|
} else {
|
|
/* more dynamic elements exist that could create new pads */
|
|
GST_DEBUG_OBJECT (decode_bin, "we have more dynamic elements");
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_decode_bin_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstDecodeBin *decode_bin;
|
|
|
|
g_return_if_fail (GST_IS_DECODE_BIN (object));
|
|
|
|
decode_bin = GST_DECODE_BIN (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_THREADED:
|
|
decode_bin->threaded = g_value_get_boolean (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_decode_bin_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstDecodeBin *decode_bin;
|
|
|
|
g_return_if_fail (GST_IS_DECODE_BIN (object));
|
|
|
|
decode_bin = GST_DECODE_BIN (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_THREADED:
|
|
g_value_set_boolean (value, decode_bin->threaded);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstElementStateReturn
|
|
gst_decode_bin_change_state (GstElement * element)
|
|
{
|
|
GstElementStateReturn ret;
|
|
GstDecodeBin *decode_bin;
|
|
gint transition;
|
|
|
|
decode_bin = GST_DECODE_BIN (element);
|
|
|
|
transition = GST_STATE_TRANSITION (element);
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
if (ret != GST_STATE_SUCCESS) {
|
|
return ret;
|
|
}
|
|
|
|
switch (transition) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
decode_bin->numpads = 0;
|
|
decode_bin->threaded = FALSE;
|
|
decode_bin->dynamics = NULL;
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (gst_decode_bin_debug, "decodebin", 0, "decoder bin");
|
|
|
|
return gst_element_register (plugin, "decodebin", GST_RANK_NONE,
|
|
GST_TYPE_DECODE_BIN);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"decodebin",
|
|
"decoder bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
|