mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5262208d6e
Original commit message from CVS: * gst/playback/Makefile.am: * gst/playback/gstdecodebin.c: (close_pad_link): * gst/playback/gstdecodebin2.c: (analyze_new_pad): * gst/playback/gstplaybasebin.c: (gst_play_base_bin_class_init), (gst_play_base_bin_handle_message_func), (unknown_type): Let decodebin be the element to post missing-plugin messages for missing decoders (rather than playbin); make playbin implement GstBin::handle_message so we can suppress missing-plugin messages for types we're not handling on purpose (don't want to bring up an installer in those cases).
1729 lines
52 KiB
C
1729 lines
52 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 <gst/utils/base-utils.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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GList *dynamics; /* list of dynamic connections */
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GList *queues; /* list of demuxer-decoder queues */
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GList *probes; /* list of PadProbeData */
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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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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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GType queue_type; /* store the GType of queues, to aid in recognising them */
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GMutex *cb_mutex; /* Mutex for multi-threaded callbacks, such as removing the fakesink */
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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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/* 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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typedef struct
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{
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GstPad *pad;
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gulong sigid;
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gboolean done;
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} PadProbeData;
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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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GstDecodeBin *decode_bin; /* pointer to ourself */
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GstElement *element; /* the element sending the signal */
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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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GstPad *pad; /* the pad sending the signal */
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gint caps_sig_id; /* signal id of caps */
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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_finalize (GObject * object);
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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 add_fakesink (GstDecodeBin * decode_bin);
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static void remove_fakesink (GstDecodeBin * decode_bin);
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static void dynamic_free (GstDynamic * dyn);
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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,
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GstElement * origelement, GstPad * pad, 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 void new_caps (GstPad * pad, GParamSpec * unused, GstDynamic * dynamic);
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static void queue_filled_cb (GstElement * queue, GstDecodeBin * decode_bin);
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static void queue_underrun_cb (GstElement * queue, 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 const GstElementDetails gst_decode_bin_details =
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GST_ELEMENT_DETAILS ("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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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_peek_parent (klass);
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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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gobject_klass->finalize = GST_DEBUG_FUNCPTR (gst_decode_bin_finalize);
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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, decoders and parsers 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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strstr (klass, "Depayloader") == 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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decode_bin->cb_mutex = g_mutex_new ();
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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, *gpad;
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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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gpad = gst_ghost_pad_new ("sink", pad);
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gst_pad_set_active (gpad, TRUE);
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gst_element_add_pad (GST_ELEMENT (decode_bin), gpad);
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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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add_fakesink (decode_bin);
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decode_bin->dynamics = NULL;
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decode_bin->queues = NULL;
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decode_bin->probes = 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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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 void
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gst_decode_bin_finalize (GObject * object)
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{
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GstDecodeBin *decode_bin = GST_DECODE_BIN (object);
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g_mutex_free (decode_bin->cb_mutex);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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struct DynFind
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{
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GstElement *elem;
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GstPad *pad;
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};
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static gint
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find_dynamic (GstDynamic * dyn, struct DynFind *info)
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{
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if (dyn->element == info->elem && dyn->pad == info->pad)
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return 0;
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return 1;
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}
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/* Add either an element (for dynamic pads/pad-added watching) or a
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* pad (for delayed caps/notify::caps watching) to the dynamic list,
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* taking care to ignore repeat entries so we don't end up handling a
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* pad twice, for example */
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static void
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dynamic_add (GstElement * element, GstPad * pad, GstDecodeBin * decode_bin)
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{
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GstDynamic *dyn;
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struct DynFind find_info;
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GList *found;
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g_return_if_fail (element != NULL);
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/* do a search that this entry doesn't already exist */
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find_info.elem = element;
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find_info.pad = pad;
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found = g_list_find_custom (decode_bin->dynamics, &find_info,
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(GCompareFunc) find_dynamic);
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if (found != NULL)
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goto exit;
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/* take refs */
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dyn = g_new0 (GstDynamic, 1);
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dyn->element = gst_object_ref (element);
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dyn->decode_bin = gst_object_ref (decode_bin);
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if (pad) {
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dyn->pad = gst_object_ref (pad);
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GST_DEBUG_OBJECT (decode_bin, "dynamic create for pad %" GST_PTR_FORMAT,
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pad);
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dyn->caps_sig_id = g_signal_connect (G_OBJECT (pad), "notify::caps",
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G_CALLBACK (new_caps), dyn);
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} else {
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GST_DEBUG_OBJECT (decode_bin, "dynamic create for element %"
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GST_PTR_FORMAT, element);
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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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}
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|
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/* and add this element to the dynamic elements */
|
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decode_bin->dynamics = g_list_prepend (decode_bin->dynamics, dyn);
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|
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return;
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exit:
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if (element) {
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GST_DEBUG_OBJECT (decode_bin, "Dynamic element already added: %"
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GST_PTR_FORMAT, element);
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} else {
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GST_DEBUG_OBJECT (decode_bin, "Dynamic pad already added: %"
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GST_PTR_FORMAT, pad);
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}
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}
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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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if (dyn->np_sig_id)
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g_signal_handler_disconnect (G_OBJECT (dyn->element), dyn->np_sig_id);
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if (dyn->nmp_sig_id)
|
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g_signal_handler_disconnect (G_OBJECT (dyn->element), dyn->nmp_sig_id);
|
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if (dyn->caps_sig_id)
|
|
g_signal_handler_disconnect (G_OBJECT (dyn->pad), dyn->caps_sig_id);
|
|
|
|
if (dyn->pad)
|
|
gst_object_unref (dyn->pad);
|
|
dyn->pad = NULL;
|
|
if (dyn->element)
|
|
gst_object_unref (dyn->element);
|
|
dyn->element = NULL;
|
|
|
|
gst_object_unref (dyn->decode_bin);
|
|
dyn->decode_bin = NULL;
|
|
|
|
g_free (dyn);
|
|
}
|
|
|
|
static void
|
|
free_dynamics (GstDecodeBin * decode_bin)
|
|
{
|
|
GList *dyns;
|
|
|
|
for (dyns = decode_bin->dynamics; dyns; dyns = g_list_next (dyns)) {
|
|
GstDynamic *dynamic = (GstDynamic *) dyns->data;
|
|
|
|
dynamic_free (dynamic);
|
|
}
|
|
g_list_free (decode_bin->dynamics);
|
|
decode_bin->dynamics = NULL;
|
|
}
|
|
|
|
/* this function runs through the element factories and returns a list
|
|
* of all elements that are able to sink the given caps
|
|
*/
|
|
static GList *
|
|
find_compatibles (GstDecodeBin * decode_bin, const GstCaps * caps)
|
|
{
|
|
GList *factories;
|
|
GList *to_try = NULL;
|
|
|
|
/* loop over all the factories */
|
|
for (factories = decode_bin->factories; factories;
|
|
factories = g_list_next (factories)) {
|
|
GstElementFactory *factory = GST_ELEMENT_FACTORY (factories->data);
|
|
const GList *templates;
|
|
GList *walk;
|
|
|
|
/* get the templates from the element factory */
|
|
templates = gst_element_factory_get_static_pad_templates (factory);
|
|
for (walk = (GList *) templates; walk; walk = g_list_next (walk)) {
|
|
GstStaticPadTemplate *templ = walk->data;
|
|
|
|
/* we only care about the sink templates */
|
|
if (templ->direction == GST_PAD_SINK) {
|
|
GstCaps *intersect;
|
|
GstCaps *tmpl_caps;
|
|
|
|
/* try to intersect the caps with the caps of the template */
|
|
tmpl_caps = gst_static_caps_get (&templ->static_caps);
|
|
|
|
intersect = gst_caps_intersect (caps, tmpl_caps);
|
|
gst_caps_unref (tmpl_caps);
|
|
|
|
/* check if the intersection is empty */
|
|
if (!gst_caps_is_empty (intersect)) {
|
|
/* non empty intersection, we can use this element */
|
|
to_try = g_list_prepend (to_try, factory);
|
|
gst_caps_unref (intersect);
|
|
break;
|
|
}
|
|
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") ||
|
|
g_str_has_prefix (mimetype, "text/x-pango-markup");
|
|
}
|
|
|
|
static void
|
|
free_pad_probes (GstDecodeBin * decode_bin)
|
|
{
|
|
GList *tmp;
|
|
|
|
/* Remove pad probes */
|
|
for (tmp = decode_bin->probes; tmp; tmp = g_list_next (tmp)) {
|
|
PadProbeData *data = (PadProbeData *) tmp->data;
|
|
|
|
gst_pad_remove_data_probe (data->pad, data->sigid);
|
|
g_free (data);
|
|
}
|
|
g_list_free (decode_bin->probes);
|
|
decode_bin->probes = NULL;
|
|
}
|
|
|
|
static void
|
|
add_fakesink (GstDecodeBin * decode_bin)
|
|
{
|
|
if (decode_bin->fakesink != NULL)
|
|
return;
|
|
|
|
g_mutex_lock (decode_bin->cb_mutex);
|
|
|
|
decode_bin->fakesink = gst_element_factory_make ("fakesink", "fakesink");
|
|
if (!decode_bin->fakesink)
|
|
goto no_fakesink;
|
|
|
|
/* hacky, remove sink flag, we don't want our decodebin to become a sink
|
|
* just because we add a fakesink element to make us ASYNC */
|
|
GST_OBJECT_FLAG_UNSET (decode_bin->fakesink, GST_ELEMENT_IS_SINK);
|
|
/* takes ownership */
|
|
if (!gst_bin_add (GST_BIN (decode_bin), decode_bin->fakesink)) {
|
|
g_warning ("Could not add fakesink element, decodebin will not work");
|
|
gst_object_unref (decode_bin->fakesink);
|
|
decode_bin->fakesink = NULL;
|
|
}
|
|
g_mutex_unlock (decode_bin->cb_mutex);
|
|
return;
|
|
|
|
/* ERRORS */
|
|
no_fakesink:
|
|
{
|
|
g_warning ("can't find fakesink element, decodebin will not work");
|
|
g_mutex_unlock (decode_bin->cb_mutex);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
remove_fakesink (GstDecodeBin * decode_bin)
|
|
{
|
|
gboolean removed_fakesink = FALSE;
|
|
|
|
if (decode_bin->fakesink == NULL)
|
|
return;
|
|
|
|
g_mutex_lock (decode_bin->cb_mutex);
|
|
if (decode_bin->fakesink) {
|
|
GST_DEBUG_OBJECT (decode_bin, "Removing fakesink and marking state dirty");
|
|
|
|
/* setting the state to NULL is never async */
|
|
gst_element_set_state (decode_bin->fakesink, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN (decode_bin), decode_bin->fakesink);
|
|
decode_bin->fakesink = NULL;
|
|
|
|
removed_fakesink = TRUE;
|
|
}
|
|
g_mutex_unlock (decode_bin->cb_mutex);
|
|
|
|
if (removed_fakesink) {
|
|
free_pad_probes (decode_bin);
|
|
|
|
gst_element_post_message (GST_ELEMENT_CAST (decode_bin),
|
|
gst_message_new_state_dirty (GST_OBJECT_CAST (decode_bin)));
|
|
}
|
|
}
|
|
|
|
/* this should be implemented with _pad_block() */
|
|
static gboolean
|
|
pad_probe (GstPad * pad, GstMiniObject * data, GstDecodeBin * decode_bin)
|
|
{
|
|
GList *tmp;
|
|
gboolean alldone = TRUE;
|
|
|
|
for (tmp = decode_bin->probes; tmp; tmp = g_list_next (tmp)) {
|
|
PadProbeData *pdata = (PadProbeData *) tmp->data;
|
|
|
|
if (pdata->pad == pad) {
|
|
if (GST_IS_BUFFER (data)) {
|
|
if (!pdata->done)
|
|
decode_bin->numwaiting--;
|
|
pdata->done = TRUE;
|
|
} else if (GST_IS_EVENT (data) &&
|
|
((GST_EVENT_TYPE (data) == GST_EVENT_EOS) ||
|
|
(GST_EVENT_TYPE (data) == GST_EVENT_TAG) ||
|
|
(GST_EVENT_TYPE (data) == GST_EVENT_FLUSH_START))) {
|
|
/* FIXME, what about NEWSEGMENT? really, use _pad_block()... */
|
|
if (!pdata->done)
|
|
decode_bin->numwaiting--;
|
|
pdata->done = TRUE;
|
|
}
|
|
}
|
|
|
|
if (!(pdata->done)) {
|
|
GST_LOG_OBJECT (decode_bin, "Pad probe on pad %" GST_PTR_FORMAT
|
|
" but pad %" GST_PTR_FORMAT " still needs data.", pad, pdata->pad);
|
|
alldone = FALSE;
|
|
}
|
|
}
|
|
if (alldone)
|
|
remove_fakesink (decode_bin);
|
|
return TRUE;
|
|
}
|
|
|
|
/* 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. It's possible that the caps are not
|
|
* fixed. */
|
|
if (mimetype_is_raw (mimetype)) {
|
|
gchar *padname;
|
|
GstPad *ghost;
|
|
PadProbeData *data;
|
|
|
|
/* make a unique name for this new pad */
|
|
padname = g_strdup_printf ("src%d", decode_bin->numpads);
|
|
decode_bin->numpads++;
|
|
|
|
/* make it a ghostpad */
|
|
ghost = gst_ghost_pad_new (padname, pad);
|
|
gst_pad_set_active (ghost, TRUE);
|
|
gst_element_add_pad (GST_ELEMENT (decode_bin), ghost);
|
|
|
|
data = g_new0 (PadProbeData, 1);
|
|
data->pad = pad;
|
|
data->done = FALSE;
|
|
|
|
/* FIXME, use _pad_block() */
|
|
data->sigid = gst_pad_add_data_probe (pad, G_CALLBACK (pad_probe),
|
|
decode_bin);
|
|
decode_bin->numwaiting++;
|
|
|
|
decode_bin->probes = g_list_append (decode_bin->probes, data);
|
|
|
|
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;
|
|
|
|
if (try_to_link_1 (decode_bin, element, pad, to_try) == NULL) {
|
|
g_list_free (to_try);
|
|
GST_LOG_OBJECT (pad, "none of the allegedly available elements usable");
|
|
goto unknown_type;
|
|
}
|
|
|
|
/* can free the list again now */
|
|
g_list_free (to_try);
|
|
}
|
|
return;
|
|
|
|
/* ERRORS */
|
|
unknown_type:
|
|
{
|
|
GST_LOG_OBJECT (pad, "unknown type found, fire signal");
|
|
g_signal_emit (G_OBJECT (decode_bin),
|
|
gst_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps);
|
|
|
|
gst_element_post_message (GST_ELEMENT_CAST (decode_bin),
|
|
gst_missing_decoder_message_new (GST_ELEMENT_CAST (decode_bin), caps));
|
|
return;
|
|
}
|
|
dont_know_yet:
|
|
{
|
|
GST_LOG_OBJECT (pad, "type is not known yet");
|
|
goto setup_caps_delay;
|
|
}
|
|
many_types:
|
|
{
|
|
GST_LOG_OBJECT (pad, "many possible types");
|
|
goto setup_caps_delay;
|
|
}
|
|
setup_caps_delay:
|
|
{
|
|
GST_LOG_OBJECT (pad, "setting up a delayed link");
|
|
dynamic_add (element, pad, decode_bin);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Decide whether an element is a demuxer based on the
|
|
* klass and number/type of src pad templates it has */
|
|
static gboolean
|
|
is_demuxer_element (GstElement * srcelement)
|
|
{
|
|
GstElementFactory *srcfactory;
|
|
GstElementClass *elemclass;
|
|
GList *walk;
|
|
const gchar *klass;
|
|
gint potential_src_pads = 0;
|
|
|
|
srcfactory = gst_element_get_factory (srcelement);
|
|
klass = gst_element_factory_get_klass (srcfactory);
|
|
|
|
/* Can't be a demuxer unless it has Demux in the klass name */
|
|
if (klass == NULL || !strstr (klass, "Demux"))
|
|
return FALSE;
|
|
|
|
/* Walk the src pad templates and count how many the element
|
|
* might produce */
|
|
elemclass = GST_ELEMENT_GET_CLASS (srcelement);
|
|
|
|
walk = gst_element_class_get_pad_template_list (elemclass);
|
|
while (walk != NULL) {
|
|
GstPadTemplate *templ;
|
|
|
|
templ = (GstPadTemplate *) walk->data;
|
|
if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) {
|
|
switch (GST_PAD_TEMPLATE_PRESENCE (templ)) {
|
|
case GST_PAD_ALWAYS:
|
|
case GST_PAD_SOMETIMES:
|
|
if (strstr (GST_PAD_TEMPLATE_NAME_TEMPLATE (templ), "%"))
|
|
potential_src_pads += 2; /* Might make multiple pads */
|
|
else
|
|
potential_src_pads += 1;
|
|
break;
|
|
case GST_PAD_REQUEST:
|
|
potential_src_pads += 2;
|
|
break;
|
|
}
|
|
}
|
|
walk = g_list_next (walk);
|
|
}
|
|
|
|
if (potential_src_pads < 2)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* 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, GstElement * srcelement, GstPad * pad,
|
|
GList * factories)
|
|
{
|
|
GList *walk;
|
|
GstElement *result = NULL;
|
|
gboolean isdemux = FALSE;
|
|
GstPad *queuesinkpad = NULL, *queuesrcpad = NULL;
|
|
GstElement *queue = NULL;
|
|
GstPad *usedsrcpad = pad;
|
|
|
|
/* Check if the parent of the src pad is a demuxer */
|
|
isdemux = is_demuxer_element (srcelement);
|
|
|
|
if (isdemux && factories != NULL) {
|
|
GstPadLinkReturn dqlink;
|
|
|
|
/* Insert a queue between demuxer and decoder */
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"Element %s is a demuxer, inserting a queue",
|
|
GST_OBJECT_NAME (srcelement));
|
|
queue = gst_element_factory_make ("queue", NULL);
|
|
decode_bin->queue_type = G_OBJECT_TYPE (queue);
|
|
|
|
g_object_set (G_OBJECT (queue), "max-size-buffers", 0, NULL);
|
|
g_object_set (G_OBJECT (queue), "max-size-time", G_GINT64_CONSTANT (0),
|
|
NULL);
|
|
g_object_set (G_OBJECT (queue), "max-size-bytes", 8192, NULL);
|
|
gst_bin_add (GST_BIN (decode_bin), queue);
|
|
gst_element_set_state (queue, GST_STATE_READY);
|
|
queuesinkpad = gst_element_get_pad (queue, "sink");
|
|
usedsrcpad = queuesrcpad = gst_element_get_pad (queue, "src");
|
|
|
|
dqlink = gst_pad_link (pad, queuesinkpad);
|
|
g_return_val_if_fail (dqlink == GST_PAD_LINK_OK, 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, duh. */
|
|
gst_element_set_state (element, GST_STATE_READY);
|
|
|
|
if ((ret = gst_pad_link (usedsrcpad, 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 {
|
|
guint sig;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "linked on pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (usedsrcpad));
|
|
|
|
/* configure the queue some more */
|
|
if (queue != NULL) {
|
|
decode_bin->queues = g_list_append (decode_bin->queues, queue);
|
|
g_signal_connect (G_OBJECT (queue),
|
|
"overrun", G_CALLBACK (queue_filled_cb), decode_bin);
|
|
g_signal_connect (G_OBJECT (queue),
|
|
"underrun", G_CALLBACK (queue_underrun_cb), decode_bin);
|
|
}
|
|
|
|
/* The link worked, now figure out what it was that we connected */
|
|
|
|
/* make sure we catch unlink signals */
|
|
sig = g_signal_connect (G_OBJECT (pad), "unlinked",
|
|
G_CALLBACK (unlinked), decode_bin);
|
|
|
|
/* 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);
|
|
|
|
/* Set the queue to paused and set the pointer to NULL so we don't
|
|
* remove it below */
|
|
if (queue != NULL) {
|
|
gst_element_set_state (queue, GST_STATE_PAUSED);
|
|
queue = NULL;
|
|
gst_object_unref (queuesrcpad);
|
|
gst_object_unref (queuesinkpad);
|
|
}
|
|
|
|
/* and exit */
|
|
goto done;
|
|
}
|
|
}
|
|
done:
|
|
if (queue != NULL) {
|
|
/* We didn't successfully connect to the queue */
|
|
gst_pad_unlink (pad, queuesinkpad);
|
|
gst_element_set_state (queue, GST_STATE_NULL);
|
|
gst_object_unref (queuesrcpad);
|
|
gst_object_unref (queuesinkpad);
|
|
gst_bin_remove (GST_BIN (decode_bin), queue);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static GstPad *
|
|
get_our_ghost_pad (GstDecodeBin * decode_bin, GstPad * pad)
|
|
{
|
|
GstIterator *pad_it = NULL;
|
|
GstPad *db_pad = NULL;
|
|
gboolean done = FALSE;
|
|
|
|
if (pad == NULL || !GST_PAD_IS_SRC (pad)) {
|
|
GST_DEBUG_OBJECT (decode_bin, "pad NULL or not SRC pad");
|
|
return NULL;
|
|
}
|
|
|
|
/* our ghostpads are the sourcepads */
|
|
pad_it = gst_element_iterate_src_pads (GST_ELEMENT (decode_bin));
|
|
while (!done) {
|
|
db_pad = NULL;
|
|
switch (gst_iterator_next (pad_it, (gpointer) & db_pad)) {
|
|
case GST_ITERATOR_OK:
|
|
GST_DEBUG_OBJECT (decode_bin, "looking at pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (db_pad));
|
|
if (GST_IS_GHOST_PAD (db_pad)) {
|
|
GstPad *target_pad = NULL;
|
|
|
|
target_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (db_pad));
|
|
done = (target_pad == pad);
|
|
if (target_pad)
|
|
gst_object_unref (target_pad);
|
|
|
|
if (done) {
|
|
/* Found our ghost pad */
|
|
GST_DEBUG_OBJECT (decode_bin, "found ghostpad %s:%s for pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (db_pad), GST_DEBUG_PAD_NAME (pad));
|
|
break;
|
|
}
|
|
}
|
|
/* Not the right one */
|
|
gst_object_unref (db_pad);
|
|
break;
|
|
case GST_ITERATOR_RESYNC:
|
|
gst_iterator_resync (pad_it);
|
|
break;
|
|
case GST_ITERATOR_ERROR:
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
gst_iterator_free (pad_it);
|
|
|
|
return db_pad;
|
|
}
|
|
|
|
/* 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));
|
|
|
|
if (G_OBJECT_TYPE (elem) == decode_bin->queue_type) {
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"Encountered demuxer output queue while removing element chain");
|
|
decode_bin->queues = g_list_remove (decode_bin->queues, 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);
|
|
gst_object_unref (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));
|
|
|
|
{
|
|
GstObject *parent = gst_pad_get_parent (peer);
|
|
|
|
if (parent) {
|
|
GstObject *grandparent = gst_object_get_parent (parent);
|
|
|
|
if (grandparent != NULL) {
|
|
if (GST_ELEMENT (grandparent) != GST_ELEMENT (decode_bin)) {
|
|
GST_DEBUG_OBJECT (decode_bin, "dead end pad %s:%s parent %s",
|
|
GST_DEBUG_PAD_NAME (peer), GST_OBJECT_NAME (grandparent));
|
|
} 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 (grandparent);
|
|
}
|
|
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);
|
|
}
|
|
|
|
/* there are @bytes bytes in @queue, enlarge it
|
|
*
|
|
* Returns: new max number of bytes in @queue
|
|
*/
|
|
static guint
|
|
queue_enlarge (GstElement * queue, guint bytes, GstDecodeBin * decode_bin)
|
|
{
|
|
/* Increase the queue size by 1Mbyte if it is over 1Mb, else double its current limit
|
|
*/
|
|
if (bytes > 1024 * 1024)
|
|
bytes += 1024 * 1024;
|
|
else
|
|
bytes *= 2;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"increasing queue %s max-size-bytes to %d", GST_ELEMENT_NAME (queue),
|
|
bytes);
|
|
g_object_set (G_OBJECT (queue), "max-size-bytes", bytes, NULL);
|
|
|
|
return bytes;
|
|
}
|
|
|
|
/* this callback is called when our queues fills up or are empty
|
|
* We then check the status of all other queues to make sure we
|
|
* never have an empty and full queue at the same time since that
|
|
* would block dataflow. In the case of a filled queue, we make
|
|
* it larger.
|
|
*/
|
|
static void
|
|
queue_underrun_cb (GstElement * queue, GstDecodeBin * decode_bin)
|
|
{
|
|
/* FIXME: we don't really do anything here for now. Ideally we should
|
|
* see if some of the queues are filled and increase their values
|
|
* in that case.
|
|
* Note: be very carefull with thread safety here as this underrun
|
|
* signal is done from the streaming thread of queue srcpad which
|
|
* is different from the pad_added (where we add the queue to the
|
|
* list) and the overrun signals that are signalled from the
|
|
* demuxer thread.
|
|
*/
|
|
}
|
|
|
|
/* Make sure we don't have a full queue and empty queue situation */
|
|
static void
|
|
queue_filled_cb (GstElement * queue, GstDecodeBin * decode_bin)
|
|
{
|
|
GList *tmp;
|
|
gboolean increase = FALSE;
|
|
guint bytes;
|
|
|
|
/* get current byte level from the queue that is filled */
|
|
g_object_get (G_OBJECT (queue), "current-level-bytes", &bytes, NULL);
|
|
GST_DEBUG_OBJECT (decode_bin, "One of the queues is full at %d bytes", bytes);
|
|
|
|
/* we do not buffer more than 20Mb */
|
|
if (bytes > (20 * 1024 * 1024))
|
|
goto too_large;
|
|
|
|
/* check all other queue to see if one is empty, in that case
|
|
* we need to enlarge @queue */
|
|
for (tmp = decode_bin->queues; tmp; tmp = g_list_next (tmp)) {
|
|
GstElement *aqueue = GST_ELEMENT (tmp->data);
|
|
guint levelbytes = 0;
|
|
|
|
if (aqueue != queue) {
|
|
g_object_get (G_OBJECT (aqueue), "current-level-bytes", &levelbytes,
|
|
NULL);
|
|
if (levelbytes == 0) {
|
|
/* yup, found an empty queue, we can stop the search and
|
|
* need to enlarge the queue */
|
|
increase = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (increase) {
|
|
/* enlarge @queue */
|
|
queue_enlarge (queue, bytes, decode_bin);
|
|
} else {
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"Queue is full but other queues are not empty, not doing anything");
|
|
}
|
|
return;
|
|
|
|
/* errors */
|
|
too_large:
|
|
{
|
|
GST_WARNING_OBJECT (decode_bin,
|
|
"Queue is bigger than 20Mbytes, something else is going wrong");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
gboolean more;
|
|
|
|
GST_OBJECT_LOCK (decode_bin);
|
|
if (decode_bin->shutting_down)
|
|
goto shutting_down1;
|
|
GST_OBJECT_UNLOCK (decode_bin);
|
|
|
|
GST_STATE_LOCK (decode_bin);
|
|
if (decode_bin->shutting_down)
|
|
goto shutting_down2;
|
|
|
|
/* see if any more pending dynamic connections exist */
|
|
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_OBJECT_UNLOCK (decode_bin);
|
|
return;
|
|
}
|
|
shutting_down2:
|
|
{
|
|
GST_STATE_UNLOCK (decode_bin);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
dynamic_remove (GstDynamic * dynamic)
|
|
{
|
|
GstDecodeBin *decode_bin = dynamic->decode_bin;
|
|
|
|
/* remove the dynamic from the list of dynamics */
|
|
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) {
|
|
if (decode_bin->numwaiting == 0) {
|
|
GST_DEBUG_OBJECT (decode_bin,
|
|
"no more dynamic elements, removing fakesink");
|
|
remove_fakesink (decode_bin);
|
|
}
|
|
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 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)
|
|
{
|
|
GST_DEBUG_OBJECT (dynamic->decode_bin, "no more pads on element %s",
|
|
GST_ELEMENT_NAME (element));
|
|
|
|
dynamic_remove (dynamic);
|
|
}
|
|
|
|
static void
|
|
new_caps (GstPad * pad, GParamSpec * unused, GstDynamic * dynamic)
|
|
{
|
|
GST_DEBUG_OBJECT (dynamic->decode_bin, "delayed link triggered");
|
|
|
|
new_pad (dynamic->element, pad, dynamic);
|
|
|
|
/* assume it worked and remove the dynamic */
|
|
dynamic_remove (dynamic);
|
|
|
|
return;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static gboolean
|
|
elem_is_dynamic (GstElement * element, GstDecodeBin * decode_bin)
|
|
{
|
|
GList *pads;
|
|
|
|
/* 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_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);
|
|
gst_object_unref (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 */
|
|
return TRUE;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
/* Don't care about ALWAYS or REQUEST pads */
|
|
break;
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* This function will be called when a pad is disconnected for some reason */
|
|
static void
|
|
unlinked (GstPad * pad, GstPad * peerpad, GstDecodeBin * decode_bin)
|
|
{
|
|
GstElement *element, *peer;
|
|
|
|
/* inactivate pad */
|
|
gst_pad_set_active (pad, GST_ACTIVATE_NONE);
|
|
|
|
peer = gst_pad_get_parent_element (peerpad);
|
|
|
|
if (!is_our_kid (peer, decode_bin))
|
|
goto exit;
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "pad %s:%s removal while alive - chained?",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
|
|
/* remove all elements linked to the peerpad */
|
|
remove_element_chain (decode_bin, peerpad);
|
|
|
|
/* Re-add as a dynamic element if needed, via close_link */
|
|
element = gst_pad_get_parent_element (pad);
|
|
if (element) {
|
|
if (elem_is_dynamic (element, decode_bin))
|
|
dynamic_add (element, NULL, decode_bin);
|
|
|
|
gst_object_unref (element);
|
|
}
|
|
|
|
exit:
|
|
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) {
|
|
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 */
|
|
|
|
dynamic_add (element, NULL, decode_bin);
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* special-case text/plain: we only want to accept it as a raw type if it
|
|
* comes from a subtitel parser element or a demuxer, but not if it is the
|
|
* type of the entire stream, in which case we just want to error out */
|
|
if (typefind == decode_bin->typefind &&
|
|
gst_structure_has_name (gst_caps_get_structure (caps, 0), "text/plain")) {
|
|
gst_element_no_more_pads (GST_ELEMENT (decode_bin));
|
|
/* we can't handle this type of stream */
|
|
GST_ELEMENT_ERROR (decode_bin, STREAM, WRONG_TYPE, (NULL),
|
|
("decodebin cannot decode plain text files"));
|
|
goto shutting_down;
|
|
}
|
|
|
|
/* 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
|
|
cleanup_decodebin (GstDecodeBin * decode_bin)
|
|
{
|
|
GstIterator *elem_it = NULL, *gpad_it = NULL;
|
|
GstPad *typefind_pad = NULL;
|
|
gboolean done = FALSE;
|
|
|
|
g_return_if_fail (GST_IS_DECODE_BIN (decode_bin));
|
|
|
|
GST_DEBUG_OBJECT (decode_bin, "cleaning up decodebin");
|
|
|
|
typefind_pad = gst_element_get_pad (decode_bin->typefind, "src");
|
|
if (GST_IS_PAD (typefind_pad)) {
|
|
g_signal_handlers_block_by_func (typefind_pad, (gpointer) unlinked,
|
|
decode_bin);
|
|
}
|
|
|
|
elem_it = gst_bin_iterate_elements (GST_BIN (decode_bin));
|
|
while (!done) {
|
|
GstElement *element = NULL;
|
|
|
|
switch (gst_iterator_next (elem_it, (gpointer) & element)) {
|
|
case GST_ITERATOR_OK:
|
|
if (element != decode_bin->typefind && element != decode_bin->fakesink) {
|
|
GST_DEBUG_OBJECT (element, "removing autoplugged element");
|
|
g_signal_handlers_disconnect_by_func (element, (gpointer) unlinked,
|
|
decode_bin);
|
|
gst_element_set_state (element, GST_STATE_NULL);
|
|
gst_bin_remove (GST_BIN (decode_bin), element);
|
|
}
|
|
gst_object_unref (element);
|
|
break;
|
|
case GST_ITERATOR_RESYNC:
|
|
gst_iterator_resync (elem_it);
|
|
break;
|
|
case GST_ITERATOR_ERROR:
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
gst_iterator_free (elem_it);
|
|
|
|
done = FALSE;
|
|
gpad_it = gst_element_iterate_pads (GST_ELEMENT (decode_bin));
|
|
while (!done) {
|
|
GstPad *pad = NULL;
|
|
|
|
switch (gst_iterator_next (gpad_it, (gpointer) & pad)) {
|
|
case GST_ITERATOR_OK:
|
|
GST_DEBUG_OBJECT (pad, "inspecting pad %s:%s",
|
|
GST_DEBUG_PAD_NAME (pad));
|
|
if (GST_IS_GHOST_PAD (pad) && GST_PAD_IS_SRC (pad)) {
|
|
GST_DEBUG_OBJECT (pad, "removing ghost pad");
|
|
gst_element_remove_pad (GST_ELEMENT (decode_bin), pad);
|
|
}
|
|
gst_object_unref (pad);
|
|
break;
|
|
case GST_ITERATOR_RESYNC:
|
|
gst_iterator_resync (gpad_it);
|
|
break;
|
|
case GST_ITERATOR_ERROR:
|
|
done = TRUE;
|
|
break;
|
|
case GST_ITERATOR_DONE:
|
|
done = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
gst_iterator_free (gpad_it);
|
|
|
|
if (GST_IS_PAD (typefind_pad)) {
|
|
g_signal_handlers_unblock_by_func (typefind_pad, (gpointer) unlinked,
|
|
decode_bin);
|
|
gst_object_unref (typefind_pad);
|
|
}
|
|
}
|
|
|
|
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;
|
|
/* catch fatal errors that may have occured in the init function */
|
|
if (decode_bin->typefind == NULL || decode_bin->fakesink == NULL) {
|
|
GST_ELEMENT_ERROR (decode_bin, CORE, MISSING_PLUGIN, (NULL), (NULL));
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
}
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
GST_OBJECT_LOCK (decode_bin);
|
|
decode_bin->shutting_down = FALSE;
|
|
GST_OBJECT_UNLOCK (decode_bin);
|
|
|
|
add_fakesink (decode_bin);
|
|
break;
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
GST_OBJECT_LOCK (decode_bin);
|
|
decode_bin->shutting_down = TRUE;
|
|
GST_OBJECT_UNLOCK (decode_bin);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
return ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
|
break;
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
free_dynamics (decode_bin);
|
|
free_pad_probes (decode_bin);
|
|
cleanup_decodebin (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)
|