mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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cffa20bf51
Original commit message from CVS: * gst/playback/Makefile.am: * gst/playback/gstdecodebin.c: (gst_decode_bin_init), (gst_decode_bin_dispose), (dynamic_create), (dynamic_free), (free_dynamics), (pad_unblocked), (pad_blocked), (close_pad_link), (try_to_link_1), (new_pad), (no_more_pads), (type_found), (gst_decode_bin_change_state): * gst/playback/gstplaybin.c: (gst_play_bin_class_init), (gst_play_bin_send_event_to_sink): * gst/playback/test5.c: (new_pad), (no_more_pads), (start_finding), (dump_element_stats), (main): * gst/playback/test6.c: (main): Make playbin async, it'll commit state to paused when all streams are detected. Remove ugly hack. Added test6.c to show async behaviour.
1210 lines
36 KiB
C
1210 lines
36 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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#include "gstplay-marshal.h"
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/* generic templates */
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static 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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static 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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GstElement *fakesink;
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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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gint numwaiting;
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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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gboolean shutting_down; /* stop pluggin if we're shutting down */
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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 we fire when a pad has been removed */
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void (*removed_decoded_pad) (GstElement * element, GstPad * pad);
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/* signal fired when we found a pad that we cannot decode */
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void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps);
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};
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#define DEFAULT_THREADED FALSE
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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_REMOVED_DECODED_PAD,
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SIGNAL_UNKNOWN_TYPE,
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SIGNAL_REDIRECT,
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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 unlink_sig_id; /* signal id of unlinked */
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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 GstStateChangeReturn gst_decode_bin_change_state (GstElement * element,
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GstStateChange transition);
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static void free_dynamics (GstDecodeBin * decode_bin);
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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, gboolean more);
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static void unlinked (GstPad * pad, GstPad * peerpad,
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GstDecodeBin * decode_bin);
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static void new_pad (GstElement * element, GstPad * pad, GstDynamic * dynamic);
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static void no_more_pads (GstElement * element, GstDynamic * dynamic);
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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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DEFAULT_THREADED, 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_play_marshal_VOID__OBJECT_BOOLEAN, G_TYPE_NONE, 2, GST_TYPE_PAD,
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G_TYPE_BOOLEAN);
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gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD] =
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g_signal_new ("removed-decoded-pad", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstDecodeBinClass, removed_decoded_pad), NULL, NULL,
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gst_marshal_VOID__OBJECT, G_TYPE_NONE, 1, GST_TYPE_PAD);
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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_OBJECT, G_TYPE_NONE, 2,
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GST_TYPE_PAD, 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_sink_template));
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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 &&
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strstr (klass, "Decoder") == NULL && strstr (klass, "Parse") == 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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gint diff;
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const gchar *rname1, *rname2;
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diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
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if (diff != 0)
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return diff;
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rname1 = gst_plugin_feature_get_name (f1);
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rname2 = gst_plugin_feature_get_name (f2);
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diff = strcmp (rname2, rname1);
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return diff;
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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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const gchar *rname;
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rname = gst_plugin_feature_get_name (feature);
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GST_DEBUG ("%s", rname);
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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_default_registry_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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GstPad *pad;
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/* add the typefind element */
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if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->typefind)) {
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g_warning ("Could not add typefind element, decodebin will not work");
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gst_object_unref (decode_bin->typefind);
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decode_bin->typefind = NULL;
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}
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/* get the sinkpad */
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pad = gst_element_get_pad (decode_bin->typefind, "sink");
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/* ghost the sink pad to ourself */
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gst_element_add_pad (GST_ELEMENT (decode_bin),
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gst_ghost_pad_new ("sink", pad));
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gst_object_unref (pad);
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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->fakesink = gst_element_factory_make ("fakesink", "fakesink");
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if (!decode_bin->fakesink) {
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g_warning ("can't find fakesink element, decodebin will not work");
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} else {
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if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->fakesink)) {
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g_warning ("Could not add fakesink element, decodebin will not work");
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gst_object_unref (decode_bin->fakesink);
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decode_bin->fakesink = NULL;
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}
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}
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decode_bin->threaded = DEFAULT_THREADED;
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decode_bin->dynamics = NULL;
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}
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static void dynamic_free (GstDynamic * dyn);
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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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decode_bin = GST_DECODE_BIN (object);
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if (decode_bin->factories)
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gst_plugin_feature_list_free (decode_bin->factories);
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decode_bin->factories = NULL;
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G_OBJECT_CLASS (parent_class)->dispose (object);
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/* our parent dispose might trigger new signals when pads are unlinked
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* etc. clean up the mess here. */
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/* FIXME do proper cleanup when going to NULL */
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free_dynamics (decode_bin);
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}
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static GstDynamic *
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dynamic_create (GstElement * element, GstDecodeBin * decode_bin)
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{
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GstDynamic *dyn;
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GST_DEBUG_OBJECT (element, "dynamic create");
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/* take refs */
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gst_object_ref (element);
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gst_object_ref (decode_bin);
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dyn = g_new0 (GstDynamic, 1);
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dyn->element = element;
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dyn->decode_bin = decode_bin;
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dyn->np_sig_id = g_signal_connect (G_OBJECT (element), "pad-added",
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G_CALLBACK (new_pad), dyn);
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dyn->nmp_sig_id = g_signal_connect (G_OBJECT (element), "no-more-pads",
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G_CALLBACK (no_more_pads), dyn);
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return dyn;
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}
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static void
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dynamic_free (GstDynamic * dyn)
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{
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GST_DEBUG_OBJECT (dyn->decode_bin, "dynamic free");
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/* disconnect signals */
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g_signal_handler_disconnect (G_OBJECT (dyn->element), dyn->np_sig_id);
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g_signal_handler_disconnect (G_OBJECT (dyn->element), dyn->nmp_sig_id);
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gst_object_unref (dyn->element);
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gst_object_unref (dyn->decode_bin);
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dyn->element = NULL;
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dyn->decode_bin = NULL;
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g_free (dyn);
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}
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static void
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free_dynamics (GstDecodeBin * decode_bin)
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{
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GList *dyns;
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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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dynamic_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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}
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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_static_pad_templates (factory);
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for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
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GstStaticPadTemplate *templ = 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 = gst_caps_intersect (caps,
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gst_static_caps_get (&templ->static_caps));
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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_prepend (to_try, factory);
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gst_caps_unref (intersect);
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break;
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}
|
|
gst_caps_unref (intersect);
|
|
}
|
|
}
|
|
}
|
|
to_try = g_list_reverse (to_try);
|
|
|
|
return to_try;
|
|
}
|
|
|
|
static gboolean
|
|
mimetype_is_raw (const gchar * mimetype)
|
|
{
|
|
return g_str_has_prefix (mimetype, "video/x-raw") ||
|
|
g_str_has_prefix (mimetype, "audio/x-raw") ||
|
|
g_str_has_prefix (mimetype, "text/plain");
|
|
}
|
|
|
|
static void
|
|
pad_unblocked (GstPad * pad, gboolean blocked, GstDecodeBin * decode_bin)
|
|
{
|
|
}
|
|
|
|
static void
|
|
pad_blocked (GstPad * pad, gboolean blocked, GstDecodeBin * decode_bin)
|
|
{
|
|
decode_bin->numwaiting--;
|
|
if (decode_bin->numwaiting == 0) {
|
|
gst_object_ref (decode_bin->fakesink);
|
|
gst_bin_remove (GST_BIN (decode_bin), decode_bin->fakesink);
|
|
|
|
gst_element_set_state (decode_bin->fakesink, GST_STATE_NULL);
|
|
gst_element_get_state (decode_bin->fakesink, NULL, NULL,
|
|
GST_CLOCK_TIME_NONE);
|
|
|
|
gst_object_unref (decode_bin->fakesink);
|
|
decode_bin->fakesink = NULL;
|
|
|
|
gst_element_post_message (GST_ELEMENT_CAST (decode_bin),
|
|
gst_message_new_state_dirty (GST_OBJECT_CAST (decode_bin)));
|
|
}
|
|
gst_pad_set_blocked_async (pad, FALSE, (GstPadBlockCallback) pad_unblocked,
|
|
NULL);
|
|
}
|
|
|
|
/* given a pad and a caps from an element, find the list of elements
|
|
* that could connect to the pad
|
|
*
|
|
* If the pad has a raw format, this function will create a ghostpad
|
|
* for the pad onto the decodebin.
|
|
*
|
|
* If no compatible elements could be found, this function will signal
|
|
* the unknown_type signal.
|
|
*/
|
|
static void
|
|
close_pad_link (GstElement * element, GstPad * pad, GstCaps * caps,
|
|
GstDecodeBin * decode_bin, gboolean more)
|
|
{
|
|
GstStructure *structure;
|
|
const gchar *mimetype;
|
|
gchar *padname;
|
|
gint diff;
|
|
|
|
padname = gst_pad_get_name (pad);
|
|
diff = strncmp (padname, "current_", 8);
|
|
g_free (padname);
|
|
|
|
/* hack.. ignore current pads */
|
|
if (!diff)
|
|
return;
|
|
|
|
/* the caps is empty, this means the pad has no type, we can only
|
|
* decide to fire the unknown_type signal. */
|
|
if (caps == NULL || gst_caps_is_empty (caps))
|
|
goto unknown_type;
|
|
|
|
/* the caps is any, this means the pad can be anything and
|
|
* we don't know yet */
|
|
if (gst_caps_is_any (caps))
|
|
goto dont_know_yet;
|
|
|
|
GST_LOG_OBJECT (element, "trying to close %" GST_PTR_FORMAT, caps);
|
|
|
|
/* FIXME, iterate over more structures? I guess it is possible that
|
|
* this pad has some encoded and some raw pads. This code will fail
|
|
* then if the first structure is not the raw type... */
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
mimetype = gst_structure_get_name (structure);
|
|
|
|
/* first see if this is raw. If the type is raw, we can
|
|
* create a ghostpad for this pad. */
|
|
if (mimetype_is_raw (mimetype)) {
|
|
gchar *padname;
|
|
GstPad *ghost;
|
|
|
|
/* make a unique name for this new pad */
|
|
padname = g_strdup_printf ("src%d", decode_bin->numpads);
|
|
decode_bin->numpads++;
|
|
decode_bin->numwaiting++;
|
|
|
|
/* make it a ghostpad */
|
|
ghost = gst_ghost_pad_new (padname, pad);
|
|
gst_element_add_pad (GST_ELEMENT (decode_bin), ghost);
|
|
|
|
gst_pad_set_blocked_async (pad, TRUE, (GstPadBlockCallback) pad_blocked,
|
|
decode_bin);
|
|
|
|
GST_LOG_OBJECT (element, "closed pad %s", padname);
|
|
|
|
/* our own signal with an extra flag that this is the only pad */
|
|
GST_DEBUG_OBJECT (decode_bin, "emitting new-decoded-pad");
|
|
g_signal_emit (G_OBJECT (decode_bin),
|
|
gst_decode_bin_signals[SIGNAL_NEW_DECODED_PAD], 0, ghost, !more);
|
|
GST_DEBUG_OBJECT (decode_bin, "emitted new-decoded-pad");
|
|
|
|
g_free (padname);
|
|
} else {
|
|
GList *to_try;
|
|
|
|
/* if the caps has many types, we need to delay */
|
|
if (gst_caps_get_size (caps) != 1)
|
|
goto many_types;
|
|
|
|
/* continue plugging, first find all compatible elements */
|
|
to_try = find_compatibles (decode_bin, caps);
|
|
if (to_try == NULL)
|
|
/* no compatible elements, we cannot go on */
|
|
goto unknown_type;
|
|
|
|
try_to_link_1 (decode_bin, pad, to_try);
|
|
/* can free the list again now */
|
|
g_list_free (to_try);
|
|
}
|
|
return;
|
|
|
|
unknown_type:
|
|
{
|
|
GST_LOG_OBJECT (pad, "unkown type found, fire signal");
|
|
g_signal_emit (G_OBJECT (decode_bin),
|
|
gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
|
|
return;
|
|
}
|
|
dont_know_yet:
|
|
{
|
|
GST_LOG_OBJECT (pad, "type is not known yet, waiting to close link");
|
|
return;
|
|
}
|
|
many_types:
|
|
{
|
|
GST_LOG_OBJECT (pad, "many possible types, waiting to close link");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* given a list of element factories, try to link one of the factories
|
|
* to the given pad.
|
|
*
|
|
* The function returns the element that was successfully linked to the
|
|
* pad.
|
|
*/
|
|
static GstElement *
|
|
try_to_link_1 (GstDecodeBin * decode_bin, GstPad * pad, GList * factories)
|
|
{
|
|
GList *walk;
|
|
GstElement *result = NULL;
|
|
|
|
/* loop over the factories */
|
|
for (walk = factories; walk; walk = g_list_next (walk)) {
|
|
GstElementFactory *factory = GST_ELEMENT_FACTORY (walk->data);
|
|
GstElement *element;
|
|
GstPadLinkReturn ret;
|
|
GstPad *sinkpad;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "trying to link %s",
|
|
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
|
|
|
|
/* make an element from the factory first */
|
|
if ((element = gst_element_factory_create (factory, NULL)) == NULL) {
|
|
/* hmm, strange. Like with all things in life, let's move on.. */
|
|
GST_WARNING_OBJECT (decode_bin, "could not create an element from %s",
|
|
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
|
|
continue;
|
|
}
|
|
|
|
/* 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 */
|
|
if ((sinkpad = gst_element_get_pad (element, "sink")) == NULL) {
|
|
/* if no pad is found we can't do anything */
|
|
GST_WARNING_OBJECT (decode_bin, "could not find sinkpad in element");
|
|
continue;
|
|
}
|
|
|
|
/* now add the element to the bin first */
|
|
GST_DEBUG_OBJECT (decode_bin, "adding %s", GST_OBJECT_NAME (element));
|
|
gst_bin_add (GST_BIN (decode_bin), element);
|
|
|
|
/* set to ready first so it is ready */
|
|
gst_element_set_state (element, GST_STATE_READY);
|
|
|
|
/* keep our own list of elements */
|
|
decode_bin->elements = g_list_prepend (decode_bin->elements, element);
|
|
|
|
if ((ret = gst_pad_link (pad, sinkpad)) != GST_PAD_LINK_OK) {
|
|
GST_DEBUG_OBJECT (decode_bin, "link failed on pad %s:%s, reason %d",
|
|
GST_DEBUG_PAD_NAME (pad), ret);
|
|
/* get rid of the sinkpad */
|
|
gst_object_unref (sinkpad);
|
|
/* this element did not work, remove it again and continue trying
|
|
* other elements, the element will be disposed. */
|
|
gst_element_set_state (element, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN (decode_bin), element);
|
|
} else {
|
|
const gchar *klass;
|
|
GstElementFactory *factory;
|
|
guint sig;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "linked on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
/* 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. Not sure that it
|
|
* really matters here but in general it is better to preroll
|
|
* on encoded data from the muxer than on raw encoded streams
|
|
* because that would consume less memory. */
|
|
}
|
|
}
|
|
|
|
/* make sure we catch unlink signals */
|
|
sig = g_signal_connect (G_OBJECT (pad), "unlinked",
|
|
G_CALLBACK (unlinked), decode_bin);
|
|
|
|
/* keep a ref to the signal id so that we can disconnect the signal callback */
|
|
g_object_set_data (G_OBJECT (pad), "unlinked_id", GINT_TO_POINTER (sig));
|
|
|
|
/* 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_set_state (element, GST_STATE_PAUSED);
|
|
|
|
result = element;
|
|
|
|
/* get rid of the sinkpad now */
|
|
gst_object_unref (sinkpad);
|
|
|
|
/* and exit */
|
|
goto done;
|
|
}
|
|
}
|
|
done:
|
|
return result;
|
|
}
|
|
|
|
static GstPad *
|
|
get_our_ghost_pad (GstDecodeBin * decode_bin, GstPad * pad)
|
|
{
|
|
#if 0
|
|
GList *ghostpads;
|
|
|
|
if (pad == NULL || !GST_PAD_IS_SRC (pad)) {
|
|
GST_DEBUG_OBJECT (decode_bin, "pad NULL or not SRC pad");
|
|
return NULL;
|
|
}
|
|
|
|
if (GST_IS_GHOST_PAD (pad)) {
|
|
GstElement *parent = gst_pad_get_parent (pad);
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "pad parent %s", GST_ELEMENT_NAME (parent));
|
|
|
|
if (parent == GST_ELEMENT (decode_bin)) {
|
|
GST_DEBUG_OBJECT (decode_bin, "pad is our ghostpad");
|
|
gst_object_unref (parent);
|
|
return pad;
|
|
} else {
|
|
GST_DEBUG_OBJECT (decode_bin, "pad is ghostpad but not ours");
|
|
gst_object_unref (parent);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "looping over ghostpads");
|
|
ghostpads = GST_REAL_PAD (pad)->ghostpads;
|
|
while (ghostpads) {
|
|
GstPad *ghostpad;
|
|
|
|
ghostpad = get_our_ghost_pad (decode_bin, GST_PAD (ghostpads->data));
|
|
if (ghostpad)
|
|
return ghostpad;
|
|
|
|
ghostpads = g_list_next (ghostpads);
|
|
}
|
|
GST_DEBUG_OBJECT (decode_bin, "done looping over ghostpads, nothing found");
|
|
#endif
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* remove all downstream elements starting from the given pad.
|
|
* Also make sure to remove the ghostpad we created for the raw
|
|
* decoded stream.
|
|
*/
|
|
static void
|
|
remove_element_chain (GstDecodeBin * decode_bin, GstPad * pad)
|
|
{
|
|
GList *int_links, *walk;
|
|
GstElement *elem = GST_ELEMENT (GST_OBJECT_PARENT (pad));
|
|
|
|
while (GST_OBJECT_PARENT (elem) &&
|
|
GST_OBJECT_PARENT (elem) != GST_OBJECT (decode_bin))
|
|
elem = GST_ELEMENT (GST_OBJECT_PARENT (elem));
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "%s:%s", GST_DEBUG_PAD_NAME (pad));
|
|
int_links = gst_pad_get_internal_links (pad);
|
|
|
|
/* remove all elements linked to this pad up to the ghostpad
|
|
* that we created for this stream */
|
|
for (walk = int_links; walk; walk = g_list_next (walk)) {
|
|
GstPad *pad;
|
|
GstPad *ghostpad;
|
|
GstPad *peer;
|
|
|
|
pad = GST_PAD (walk->data);
|
|
GST_DEBUG_OBJECT (decode_bin, "inspecting internal pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
ghostpad = get_our_ghost_pad (decode_bin, pad);
|
|
if (ghostpad) {
|
|
GST_DEBUG_OBJECT (decode_bin, "found our ghost pad %s:%s for %s:%s",
|
|
GST_DEBUG_PAD_NAME (ghostpad), GST_DEBUG_PAD_NAME (pad));
|
|
|
|
g_signal_emit (G_OBJECT (decode_bin),
|
|
gst_decode_bin_signals[SIGNAL_REMOVED_DECODED_PAD], 0, ghostpad);
|
|
|
|
gst_element_remove_pad (GST_ELEMENT (decode_bin), ghostpad);
|
|
continue;
|
|
} else {
|
|
GST_DEBUG_OBJECT (decode_bin, "not one of our ghostpads");
|
|
}
|
|
|
|
peer = gst_pad_get_peer (pad);
|
|
if (peer == NULL)
|
|
continue;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "internal pad %s:%s linked to pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (peer));
|
|
|
|
{
|
|
GstElement *parent = gst_pad_get_parent_element (peer);
|
|
|
|
if (parent) {
|
|
if (parent != GST_ELEMENT (decode_bin)) {
|
|
GST_DEBUG_OBJECT (decode_bin, "dead end pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (peer));
|
|
} else {
|
|
GST_DEBUG_OBJECT (decode_bin, "recursing element %s on pad %s:%s",
|
|
GST_ELEMENT_NAME (elem), GST_DEBUG_PAD_NAME (pad));
|
|
remove_element_chain (decode_bin, peer);
|
|
}
|
|
gst_object_unref (parent);
|
|
}
|
|
}
|
|
gst_object_unref (peer);
|
|
}
|
|
GST_DEBUG_OBJECT (decode_bin, "removing %s", GST_ELEMENT_NAME (elem));
|
|
|
|
g_list_free (int_links);
|
|
|
|
gst_element_set_state (elem, GST_STATE_NULL);
|
|
|
|
gst_bin_remove (GST_BIN (decode_bin), elem);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
GstDecodeBin *decode_bin = dynamic->decode_bin;
|
|
GstCaps *caps;
|
|
|
|
GST_LOCK (decode_bin);
|
|
if (decode_bin->shutting_down)
|
|
goto shutting_down1;
|
|
GST_UNLOCK (decode_bin);
|
|
|
|
GST_STATE_LOCK (decode_bin);
|
|
if (decode_bin->shutting_down)
|
|
goto shutting_down2;
|
|
|
|
/* see if any more pending dynamic connections exist */
|
|
gboolean more = gst_decode_bin_is_dynamic (decode_bin);
|
|
|
|
caps = gst_pad_get_caps (pad);
|
|
close_pad_link (element, pad, caps, decode_bin, more);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
GST_STATE_UNLOCK (decode_bin);
|
|
|
|
return;
|
|
|
|
shutting_down1:
|
|
GST_UNLOCK (decode_bin);
|
|
return;
|
|
|
|
shutting_down2:
|
|
GST_STATE_UNLOCK (decode_bin);
|
|
return;
|
|
}
|
|
|
|
/* 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_NAME (element));
|
|
|
|
/* remove the element from the list of dynamic elements */
|
|
decode_bin->dynamics = g_list_remove (decode_bin->dynamics, dynamic);
|
|
dynamic_free (dynamic);
|
|
|
|
/* if we have no more dynamic elements, we have no chance 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");
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
is_our_kid (GstElement * e, GstDecodeBin * decode_bin)
|
|
{
|
|
gboolean ret;
|
|
GstElement *parent;
|
|
|
|
parent = (GstElement *) gst_object_get_parent ((GstObject *) e);
|
|
ret = (parent == (GstElement *) decode_bin);
|
|
|
|
if (parent)
|
|
gst_object_unref ((GstObject *) parent);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* This function will be called when a pad is disconnected for some reason */
|
|
static void
|
|
unlinked (GstPad * pad, GstPad * peerpad, GstDecodeBin * decode_bin)
|
|
{
|
|
GstDynamic *dyn;
|
|
GstElement *element, *peer;
|
|
|
|
/* inactivate pad */
|
|
gst_pad_set_active (pad, GST_ACTIVATE_NONE);
|
|
|
|
element = gst_pad_get_parent_element (pad);
|
|
peer = gst_pad_get_parent_element (peerpad);
|
|
|
|
if (!is_our_kid (peer, decode_bin))
|
|
goto exit;
|
|
|
|
/* remove all elements linked to the peerpad */
|
|
remove_element_chain (decode_bin, peerpad);
|
|
|
|
/* if an element removes two pads, then we don't want this twice */
|
|
if (g_list_find (decode_bin->dynamics, element) != NULL)
|
|
goto exit;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "pad removal while alive - chained?");
|
|
|
|
dyn = dynamic_create (element, decode_bin);
|
|
/* and add this element to the dynamic elements */
|
|
decode_bin->dynamics = g_list_prepend (decode_bin->dynamics, dyn);
|
|
|
|
exit:
|
|
gst_object_unref (element);
|
|
gst_object_unref (peer);
|
|
}
|
|
|
|
/* 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;
|
|
gboolean more;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "closing links with element %s",
|
|
GST_ELEMENT_NAME (element));
|
|
|
|
/* loop over all the padtemplates */
|
|
for (pads = GST_ELEMENT_GET_CLASS (element)->padtemplates; 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 = dynamic_create (element, decode_bin);
|
|
/* and add this element to the dynamic elements */
|
|
decode_bin->dynamics = g_list_prepend (decode_bin->dynamics, dyn);
|
|
}
|
|
|
|
/* Check if this is an element with more than 1 pad. If this element
|
|
* has more than 1 pad, we need to be carefull not to signal the
|
|
* no_more_pads signal after connecting the first pad. */
|
|
more = g_list_length (to_connect) > 1;
|
|
|
|
/* now loop over all the pads we need to connect */
|
|
for (pads = to_connect; pads; pads = g_list_next (pads)) {
|
|
GstPad *pad = GST_PAD_CAST (pads->data);
|
|
GstCaps *caps;
|
|
|
|
/* we have more pads if we have more than 1 pad to connect or
|
|
* dynamics. If we have only 1 pad and no dynamics, more will be
|
|
* set to FALSE and the no-more-pads signal will be fired. Note
|
|
* that this can change after the close_pad_link call. */
|
|
more |= gst_decode_bin_is_dynamic (decode_bin);
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "closing pad link for %s",
|
|
GST_OBJECT_NAME (pad));
|
|
|
|
/* continue autoplugging on the pads */
|
|
caps = gst_pad_get_caps (pad);
|
|
close_pad_link (element, pad, caps, decode_bin, more);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
|
|
gst_object_unref (pad);
|
|
}
|
|
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;
|
|
GstPad *pad;
|
|
|
|
GST_STATE_LOCK (decode_bin);
|
|
if (decode_bin->shutting_down)
|
|
goto shutting_down;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "typefind found caps %" GST_PTR_FORMAT, caps);
|
|
|
|
/* autoplug the new pad with the caps that the signal gave us. */
|
|
pad = gst_element_get_pad (typefind, "src");
|
|
close_pad_link (typefind, pad, caps, decode_bin, FALSE);
|
|
gst_object_unref (pad);
|
|
|
|
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");
|
|
}
|
|
|
|
shutting_down:
|
|
GST_STATE_UNLOCK (decode_bin);
|
|
return;
|
|
}
|
|
|
|
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 GstStateChangeReturn
|
|
gst_decode_bin_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
GstDecodeBin *decode_bin;
|
|
|
|
decode_bin = GST_DECODE_BIN (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
decode_bin->numpads = 0;
|
|
decode_bin->numwaiting = 0;
|
|
decode_bin->dynamics = NULL;
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_LOCK (decode_bin);
|
|
decode_bin->shutting_down = FALSE;
|
|
GST_UNLOCK (decode_bin);
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_LOCK (decode_bin);
|
|
decode_bin->shutting_down = TRUE;
|
|
GST_UNLOCK (decode_bin);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
free_dynamics (decode_bin);
|
|
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_NAME,
|
|
GST_PACKAGE_ORIGIN)
|