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Original commit message from CVS: First THREADED backport attempt, focusing on adding locks and making sure the API is threadsafe. Needs more work. More docs follow this week.
826 lines
27 KiB
C
826 lines
27 KiB
C
/* GStreamer
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* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
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*
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* gsttypefind.c: element that detects type of stream
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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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/* FIXME: need a better solution for non-seekable streams */
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/* way of operation:
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* 1) get a list of all typefind functions sorted best to worst
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* 2) if all elements have been called with all requested data goto 8
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* 3) call all functions once with all available data
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* 4) if a function returns a value >= ARG_MAXIMUM goto 8
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* 5) all functions with a result > ARG_MINIMUM or functions that did not get
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* all requested data (where peek returned NULL) stay in list
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* 6) seek to requested offset of best function that still has open data
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* requests
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* 7) goto 2
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* 8) take best available result and use its caps
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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 "gsttypefindelement.h"
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#include "gst/gst_private.h"
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#include "gst/gst-i18n-lib.h"
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#include <gst/gsttypefind.h>
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#include <gst/gstutils.h>
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#include <gst/gsterror.h>
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GST_DEBUG_CATEGORY_STATIC (gst_type_find_element_debug);
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#define GST_CAT_DEFAULT gst_type_find_element_debug
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GstElementDetails gst_type_find_element_details =
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GST_ELEMENT_DETAILS ("TypeFind",
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"Generic",
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"Finds the media type of a stream",
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"Benjamin Otte <in7y118@public.uni-hamburg.de>");
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/* generic templates */
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GstStaticPadTemplate type_find_element_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GstStaticPadTemplate type_find_element_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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/* TypeFind signals and args */
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enum
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{
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HAVE_TYPE,
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_CAPS,
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ARG_MINIMUM,
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ARG_MAXIMUM
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};
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enum
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{
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MODE_NORMAL, /* act as identity */
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MODE_TRANSITION, /* wait for the discont between the two
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* other modes */
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MODE_TYPEFIND /* do typefinding */
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};
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#define _do_init(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_type_find_element_debug, "typefind", \
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GST_DEBUG_BG_YELLOW | GST_DEBUG_FG_GREEN, "type finding element");
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GST_BOILERPLATE_FULL (GstTypeFindElement, gst_type_find_element, GstElement,
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GST_TYPE_ELEMENT, _do_init);
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static void gst_type_find_element_dispose (GObject * object);
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static void gst_type_find_element_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_type_find_element_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static const GstEventMask *gst_type_find_element_src_event_mask (GstPad * pad);
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static gboolean gst_type_find_element_src_event (GstPad * pad,
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GstEvent * event);
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static gboolean gst_type_find_handle_src_query (GstPad * pad,
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GstQueryType type, GstFormat * fmt, gint64 * value);
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static void push_buffer_store (GstTypeFindElement * typefind);
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static void gst_type_find_element_chain (GstPad * sinkpad, GstData * data);
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static GstElementStateReturn
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gst_type_find_element_change_state (GstElement * element);
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static guint gst_type_find_element_signals[LAST_SIGNAL] = { 0 };
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static void
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gst_type_find_element_have_type (GstTypeFindElement * typefind,
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guint probability, const GstCaps * caps)
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{
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g_assert (typefind->caps == NULL);
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g_assert (caps != NULL);
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GST_INFO_OBJECT (typefind, "found caps %" GST_PTR_FORMAT, caps);
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typefind->caps = gst_caps_copy (caps);
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gst_pad_set_explicit_caps (typefind->src, caps);
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}
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static void
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gst_type_find_element_base_init (gpointer g_class)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&type_find_element_src_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&type_find_element_sink_template));
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gst_element_class_set_details (gstelement_class,
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&gst_type_find_element_details);
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}
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static void
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gst_type_find_element_class_init (GstTypeFindElementClass * typefind_class)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (typefind_class);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (typefind_class);
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_type_find_element_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_type_find_element_get_property);
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_type_find_element_dispose);
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typefind_class->have_type = gst_type_find_element_have_type;
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g_object_class_install_property (gobject_class, ARG_CAPS,
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g_param_spec_boxed ("caps", _("caps"),
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_("detected capabilities in stream"), gst_caps_get_type (),
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G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_MINIMUM,
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g_param_spec_uint ("minimum", _("minimum"),
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"minimum probability required to accept caps", GST_TYPE_FIND_MINIMUM,
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GST_TYPE_FIND_MAXIMUM, GST_TYPE_FIND_MINIMUM, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MINIMUM,
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g_param_spec_uint ("maximum", _("maximum"),
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"probability to stop typefinding", GST_TYPE_FIND_MINIMUM,
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GST_TYPE_FIND_MAXIMUM, GST_TYPE_FIND_MAXIMUM, G_PARAM_READWRITE));
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gst_type_find_element_signals[HAVE_TYPE] = g_signal_new ("have_type",
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G_TYPE_FROM_CLASS (typefind_class), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstTypeFindElementClass, have_type), NULL, NULL,
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gst_marshal_VOID__UINT_BOXED, G_TYPE_NONE, 2,
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G_TYPE_UINT, GST_TYPE_CAPS | G_SIGNAL_TYPE_STATIC_SCOPE);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_type_find_element_change_state);
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}
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static void
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gst_type_find_element_init (GstTypeFindElement * typefind)
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{
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/* sinkpad */
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typefind->sink =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&type_find_element_sink_template), "sink");
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gst_pad_set_chain_function (typefind->sink, gst_type_find_element_chain);
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gst_element_add_pad (GST_ELEMENT (typefind), typefind->sink);
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/* srcpad */
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typefind->src =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&type_find_element_src_template), "src");
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gst_pad_set_event_function (typefind->src, gst_type_find_element_src_event);
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gst_pad_set_event_mask_function (typefind->src,
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gst_type_find_element_src_event_mask);
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gst_pad_set_query_function (typefind->src,
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GST_DEBUG_FUNCPTR (gst_type_find_handle_src_query));
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gst_pad_use_explicit_caps (typefind->src);
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gst_element_add_pad (GST_ELEMENT (typefind), typefind->src);
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typefind->caps = NULL;
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typefind->min_probability = 1;
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typefind->max_probability = GST_TYPE_FIND_MAXIMUM;
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typefind->store = gst_buffer_store_new ();
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GST_FLAG_SET (typefind, GST_ELEMENT_EVENT_AWARE);
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}
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static void
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gst_type_find_element_dispose (GObject * object)
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{
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GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (object);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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if (typefind->store) {
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g_object_unref (typefind->store);
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typefind->store = NULL;
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}
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}
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static void
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gst_type_find_element_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstTypeFindElement *typefind;
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g_return_if_fail (GST_IS_TYPE_FIND_ELEMENT (object));
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typefind = GST_TYPE_FIND_ELEMENT (object);
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switch (prop_id) {
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case ARG_MINIMUM:
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typefind->min_probability = g_value_get_uint (value);
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g_object_notify (object, "minimum");
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break;
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case ARG_MAXIMUM:
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typefind->max_probability = g_value_get_uint (value);
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g_object_notify (object, "maximum");
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_type_find_element_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstTypeFindElement *typefind;
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g_return_if_fail (GST_IS_TYPE_FIND_ELEMENT (object));
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typefind = GST_TYPE_FIND_ELEMENT (object);
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switch (prop_id) {
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case ARG_CAPS:
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g_value_set_boxed (value, typefind->caps);
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break;
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case ARG_MINIMUM:
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g_value_set_uint (value, typefind->min_probability);
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break;
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case ARG_MAXIMUM:
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g_value_set_uint (value, typefind->max_probability);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_type_find_handle_src_query (GstPad * pad,
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GstQueryType type, GstFormat * fmt, gint64 * value)
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{
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GstTypeFindElement *typefind =
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GST_TYPE_FIND_ELEMENT (gst_pad_get_parent (pad));
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gboolean res;
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res = gst_pad_query (GST_PAD_PEER (typefind->sink), type, fmt, value);
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if (!res)
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return FALSE;
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if (type == GST_QUERY_POSITION && typefind->store != NULL) {
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/* FIXME: this code assumes that there's no discont in the queue */
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switch (*fmt) {
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case GST_FORMAT_BYTES:
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*value -= gst_buffer_store_get_size (typefind->store, 0);
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break;
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default:
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/* FIXME */
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break;
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}
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}
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return TRUE;
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}
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static const GstEventMask *
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gst_type_find_element_src_event_mask (GstPad * pad)
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{
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static const GstEventMask mask[] = {
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{GST_EVENT_SEEK,
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GST_SEEK_METHOD_SET | GST_SEEK_METHOD_CUR | GST_SEEK_METHOD_END |
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GST_SEEK_FLAG_FLUSH},
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/* add more if you want, event masks suck and need to die anyway */
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{0,}
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};
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return mask;
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}
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static gboolean
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gst_type_find_element_src_event (GstPad * pad, GstEvent * event)
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{
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GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (GST_PAD_PARENT (pad));
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if (typefind->mode != MODE_NORMAL) {
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/* need to do more? */
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gst_data_unref (GST_DATA (event));
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return FALSE;
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}
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return gst_pad_event_default (pad, event);
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}
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typedef struct
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{
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GstTypeFindFactory *factory;
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gint probability;
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GstCaps *caps;
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gint64 requested_offset;
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guint requested_size;
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GList *buffers;
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GstTypeFindElement *self;
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}
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TypeFindEntry;
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static inline TypeFindEntry *
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new_entry (void)
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{
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return g_new0 (TypeFindEntry, 1);
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}
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static void
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free_entry_buffers (TypeFindEntry * entry)
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{
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g_list_foreach (entry->buffers, (GFunc) gst_data_unref, NULL);
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g_list_free (entry->buffers);
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entry->buffers = NULL;
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}
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static void
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free_entry (TypeFindEntry * entry)
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{
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free_entry_buffers (entry);
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if (entry->caps)
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gst_caps_unref (entry->caps);
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g_free (entry);
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}
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static void
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start_typefinding (GstTypeFindElement * typefind)
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{
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g_assert (typefind->possibilities == NULL);
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GST_DEBUG_OBJECT (typefind, "starting typefinding");
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gst_pad_unnegotiate (typefind->src);
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if (typefind->caps) {
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gst_caps_replace (&typefind->caps, NULL);
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}
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typefind->mode = MODE_TYPEFIND;
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typefind->stream_length_available = TRUE;
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typefind->stream_length = 0;
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}
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static void
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stop_typefinding (GstTypeFindElement * typefind)
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{
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/* stop all typefinding and set mode back to normal */
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gboolean push_cached_buffers =
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gst_element_get_state (GST_ELEMENT (typefind)) == GST_STATE_PLAYING;
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GST_DEBUG_OBJECT (typefind, "stopping typefinding%s",
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push_cached_buffers ? " and pushing cached buffers" : "");
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if (typefind->possibilities != NULL) {
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/* this should only happen on PAUSED => READY or EOS */
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GST_LOG_OBJECT (typefind, "freeing remaining %u typefind functions",
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g_list_length (typefind->possibilities));
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g_list_foreach (typefind->possibilities, (GFunc) free_entry, NULL);
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g_list_free (typefind->possibilities);
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typefind->possibilities = NULL;
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}
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typefind->mode = MODE_TRANSITION;
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if (!push_cached_buffers) {
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gst_buffer_store_clear (typefind->store);
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} else {
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guint size = gst_buffer_store_get_size (typefind->store, 0);
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GST_DEBUG_OBJECT (typefind, "seeking back to current position %u", size);
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if (!gst_pad_send_event (GST_PAD_PEER (typefind->sink),
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gst_event_new_seek (GST_SEEK_METHOD_SET | GST_FORMAT_BYTES,
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size))) {
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GST_WARNING_OBJECT (typefind,
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"could not seek to required position %u, hope for the best", size);
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typefind->mode = MODE_NORMAL;
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/* push out our queued buffers here */
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push_buffer_store (typefind);
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} else {
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typefind->waiting_for_discont_offset = size;
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}
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}
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}
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static void
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push_buffer_store (GstTypeFindElement * typefind)
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{
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guint size = gst_buffer_store_get_size (typefind->store, 0);
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GstBuffer *buffer;
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gst_pad_push (typefind->src, GST_DATA (gst_event_new_discontinuous (TRUE,
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GST_FORMAT_DEFAULT, (guint64) 0, GST_FORMAT_BYTES, (guint64) 0,
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GST_FORMAT_UNDEFINED)));
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if (size && (buffer = gst_buffer_store_get_buffer (typefind->store, 0, size))) {
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GST_DEBUG_OBJECT (typefind, "pushing cached data (%u bytes)", size);
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gst_pad_push (typefind->src, GST_DATA (buffer));
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} else {
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/* FIXME: shouldn't we throw an error here? */
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size = 0;
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}
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gst_buffer_store_clear (typefind->store);
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}
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static guint64
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find_element_get_length (gpointer data)
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{
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TypeFindEntry *entry = (TypeFindEntry *) data;
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GstTypeFindElement *typefind = entry->self;
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GstFormat format = GST_FORMAT_BYTES;
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if (!typefind->stream_length_available) {
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GST_LOG_OBJECT (entry->self,
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"'%s' called get_length () but we know it's not available",
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GST_PLUGIN_FEATURE_NAME (entry->factory));
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return 0;
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}
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if (entry->self->stream_length == 0) {
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typefind->stream_length_available =
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gst_pad_query (GST_PAD_PEER (entry->self->sink), GST_QUERY_TOTAL,
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&format, &entry->self->stream_length);
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if (format != GST_FORMAT_BYTES)
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typefind->stream_length_available = FALSE;
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if (!typefind->stream_length_available) {
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GST_DEBUG_OBJECT (entry->self,
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"'%s' called get_length () but it's not available",
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GST_PLUGIN_FEATURE_NAME (entry->factory));
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return 0;
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} else {
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GST_DEBUG_OBJECT (entry->self,
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"'%s' called get_length () and it's %" G_GUINT64_FORMAT " bytes",
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GST_PLUGIN_FEATURE_NAME (entry->factory), entry->self->stream_length);
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}
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}
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return entry->self->stream_length;
|
|
}
|
|
static void
|
|
gst_type_find_element_handle_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
TypeFindEntry *entry;
|
|
GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (GST_PAD_PARENT (pad));
|
|
|
|
GST_DEBUG_OBJECT (typefind, "got event %d in mode %d", GST_EVENT_TYPE (event),
|
|
typefind->mode);
|
|
|
|
switch (typefind->mode) {
|
|
case MODE_TYPEFIND:
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
/* this should only happen when we got all available data */
|
|
entry =
|
|
(TypeFindEntry *) typefind->possibilities ? typefind->
|
|
possibilities->data : NULL;
|
|
if (entry && entry->probability >= typefind->min_probability) {
|
|
GST_INFO_OBJECT (typefind,
|
|
"'%s' is the best typefind left after we got all data, using it now (probability %u)",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), entry->probability);
|
|
g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE],
|
|
0, entry->probability, entry->caps);
|
|
stop_typefinding (typefind);
|
|
push_buffer_store (typefind);
|
|
gst_pad_event_default (pad, event);
|
|
} else {
|
|
gst_pad_event_default (pad, event);
|
|
GST_ELEMENT_ERROR (typefind, STREAM, TYPE_NOT_FOUND, (NULL),
|
|
(NULL));
|
|
stop_typefinding (typefind);
|
|
}
|
|
break;
|
|
default:
|
|
gst_data_unref (GST_DATA (event));
|
|
break;
|
|
}
|
|
break;
|
|
case MODE_TRANSITION:
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_DISCONTINUOUS) {
|
|
if (GST_EVENT_DISCONT_NEW_MEDIA (event)) {
|
|
start_typefinding (typefind);
|
|
gst_event_unref (event);
|
|
} else {
|
|
guint64 off;
|
|
|
|
if (gst_event_discont_get_value (event, GST_FORMAT_BYTES, &off) &&
|
|
off == typefind->waiting_for_discont_offset) {
|
|
typefind->mode = MODE_NORMAL;
|
|
push_buffer_store (typefind);
|
|
} else {
|
|
gst_event_unref (event);
|
|
}
|
|
}
|
|
} else if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
|
|
push_buffer_store (typefind);
|
|
gst_pad_event_default (pad, event);
|
|
} else {
|
|
gst_event_unref (event);
|
|
}
|
|
break;
|
|
case MODE_NORMAL:
|
|
if (GST_EVENT_TYPE (event) == GST_EVENT_DISCONTINUOUS &&
|
|
GST_EVENT_DISCONT_NEW_MEDIA (event)) {
|
|
start_typefinding (typefind);
|
|
gst_event_unref (event);
|
|
} else {
|
|
gst_pad_event_default (pad, event);
|
|
}
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
static guint8 *
|
|
find_peek (gpointer data, gint64 offset, guint size)
|
|
{
|
|
GstBuffer *buf;
|
|
TypeFindEntry *entry = (TypeFindEntry *) data;
|
|
|
|
GST_LOG_OBJECT (entry->self, "'%s' called peek (%" G_GINT64_FORMAT ", %u)",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), offset, size);
|
|
if (offset >= 0) {
|
|
buf = gst_buffer_store_get_buffer (entry->self->store, offset, size);
|
|
} else {
|
|
/* FIXME: can we do this easily without querying length? */
|
|
guint64 length = find_element_get_length (data);
|
|
|
|
if (length == 0) {
|
|
buf = NULL;
|
|
} else {
|
|
buf =
|
|
gst_buffer_store_get_buffer (entry->self->store, length + offset,
|
|
size);
|
|
}
|
|
}
|
|
|
|
if (buf) {
|
|
entry->buffers = g_list_prepend (entry->buffers, buf);
|
|
return GST_BUFFER_DATA (buf);
|
|
} else {
|
|
if (entry->requested_size == 0) {
|
|
GST_LOG_OBJECT (entry->self,
|
|
"setting requested peek (%" G_GINT64_FORMAT ", %u) on '%s'", offset,
|
|
size, GST_PLUGIN_FEATURE_NAME (entry->factory));
|
|
entry->requested_offset = offset;
|
|
entry->requested_size = size;
|
|
}
|
|
return NULL;
|
|
}
|
|
}
|
|
static void
|
|
find_suggest (gpointer data, guint probability, const GstCaps * caps)
|
|
{
|
|
TypeFindEntry *entry = (TypeFindEntry *) data;
|
|
|
|
GST_LOG_OBJECT (entry->self, "'%s' called suggest (%u, %" GST_PTR_FORMAT ")",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), probability, caps);
|
|
if (((gint) probability) > entry->probability) {
|
|
entry->probability = probability;
|
|
gst_caps_replace (&entry->caps, gst_caps_copy (caps));
|
|
}
|
|
}
|
|
static gint
|
|
compare_type_find_entry (gconstpointer a, gconstpointer b)
|
|
{
|
|
TypeFindEntry *one = (TypeFindEntry *) a;
|
|
TypeFindEntry *two = (TypeFindEntry *) b;
|
|
|
|
if (one->probability == two->probability) {
|
|
/* FIXME: can be improved by analyzing requests */
|
|
return 0;
|
|
} else {
|
|
return two->probability - one->probability;
|
|
}
|
|
}
|
|
static gint
|
|
compare_type_find_factory (gconstpointer fac1, gconstpointer fac2)
|
|
{
|
|
return GST_PLUGIN_FEATURE (fac1)->rank - GST_PLUGIN_FEATURE (fac2)->rank;
|
|
}
|
|
static void
|
|
gst_type_find_element_chain (GstPad * pad, GstData * data)
|
|
{
|
|
GstTypeFindElement *typefind;
|
|
GList *entries;
|
|
TypeFindEntry *entry;
|
|
GList *walk;
|
|
GstTypeFind find = { find_peek, find_suggest, NULL, find_element_get_length };
|
|
|
|
typefind = GST_TYPE_FIND_ELEMENT (GST_PAD_PARENT (pad));
|
|
if (GST_IS_EVENT (data)) {
|
|
gst_type_find_element_handle_event (pad, GST_EVENT (data));
|
|
return;
|
|
}
|
|
switch (typefind->mode) {
|
|
case MODE_NORMAL:
|
|
gst_pad_push (typefind->src, data);
|
|
return;
|
|
case MODE_TRANSITION:
|
|
gst_data_unref (data);
|
|
return;
|
|
case MODE_TYPEFIND:{
|
|
guint64 current_offset;
|
|
|
|
gst_buffer_store_add_buffer (typefind->store, GST_BUFFER (data));
|
|
current_offset = GST_BUFFER_OFFSET_IS_VALID (data) ?
|
|
GST_BUFFER_OFFSET (data) + GST_BUFFER_SIZE (data) :
|
|
gst_buffer_store_get_size (typefind->store, 0);
|
|
gst_data_unref (data);
|
|
if (typefind->possibilities == NULL) {
|
|
/* not yet started, get all typefinding functions into our "queue" */
|
|
GList *all_factories = gst_type_find_factory_get_list ();
|
|
|
|
GST_INFO_OBJECT (typefind, "starting with %u typefinding functions",
|
|
g_list_length ((GList *) all_factories));
|
|
|
|
all_factories = g_list_sort (all_factories, compare_type_find_factory);
|
|
walk = all_factories;
|
|
while (all_factories) {
|
|
entry = new_entry ();
|
|
|
|
entry->factory = GST_TYPE_FIND_FACTORY (all_factories->data);
|
|
entry->self = typefind;
|
|
entry->probability = 0;
|
|
typefind->possibilities =
|
|
g_list_prepend (typefind->possibilities, entry);
|
|
all_factories = g_list_next (all_factories);
|
|
}
|
|
g_list_free (all_factories);
|
|
}
|
|
/* call every typefind function once */
|
|
walk = entries = typefind->possibilities;
|
|
GST_INFO_OBJECT (typefind, "iterating %u typefinding functions",
|
|
g_list_length (entries));
|
|
typefind->possibilities = NULL;
|
|
while (walk) {
|
|
find.data = entry = (TypeFindEntry *) walk->data;
|
|
walk = g_list_next (walk);
|
|
entry->probability = 0;
|
|
entry->requested_offset = 0;
|
|
entry->requested_size = 0;
|
|
gst_type_find_factory_call_function (entry->factory, &find);
|
|
free_entry_buffers (entry);
|
|
if (entry->probability == 0 && entry->requested_size == 0) {
|
|
GST_DEBUG_OBJECT (typefind,
|
|
"'%s' was removed - no chance of being the right plugin",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory));
|
|
free_entry (entry);
|
|
} else if (entry->probability >= typefind->max_probability) {
|
|
/* wooha, got caps */
|
|
GstCaps *found_caps = entry->caps;
|
|
guint probability = entry->probability;
|
|
|
|
GST_INFO_OBJECT (typefind,
|
|
"'%s' returned %u/%u probability, using it NOW",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), probability,
|
|
typefind->max_probability);
|
|
while (walk) {
|
|
free_entry ((TypeFindEntry *) walk->data);
|
|
walk = g_list_next (walk);
|
|
}
|
|
walk = typefind->possibilities;
|
|
while (walk) {
|
|
free_entry (walk->data);
|
|
walk = g_list_next (walk);
|
|
}
|
|
typefind->possibilities = NULL;
|
|
g_list_free (typefind->possibilities);
|
|
g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE], 0,
|
|
probability, found_caps);
|
|
free_entry (entry);
|
|
} else {
|
|
typefind->possibilities =
|
|
g_list_prepend (typefind->possibilities, entry);
|
|
}
|
|
}
|
|
g_list_free (entries);
|
|
/* we may now already have caps or we might be left without functions to try */
|
|
if (typefind->caps) {
|
|
stop_typefinding (typefind);
|
|
} else if (typefind->possibilities == NULL) {
|
|
error:
|
|
GST_ELEMENT_ERROR (typefind, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
|
|
stop_typefinding (typefind);
|
|
} else {
|
|
/* set up typefind element for next iteration */
|
|
typefind->possibilities =
|
|
g_list_sort (typefind->possibilities, compare_type_find_entry);
|
|
|
|
/* look for typefind functions that require data without seeking */
|
|
for (walk = typefind->possibilities; walk; walk = g_list_next (walk)) {
|
|
entry = (TypeFindEntry *) walk->data;
|
|
if (entry->requested_offset <= current_offset &&
|
|
entry->requested_offset + entry->requested_size > current_offset)
|
|
break;
|
|
}
|
|
if (!walk) {
|
|
/* find out if we should seek */
|
|
restart:
|
|
for (walk = typefind->possibilities; walk; walk = g_list_next (walk)) {
|
|
entry = (TypeFindEntry *) walk->data;
|
|
if (entry->requested_size > 0) {
|
|
/* FIXME: need heuristic to find out if we should seek */
|
|
gint64 seek_offset;
|
|
GstEvent *event;
|
|
|
|
seek_offset =
|
|
entry->requested_offset >
|
|
0 ? entry->
|
|
requested_offset : find_element_get_length (entry) +
|
|
entry->requested_offset;
|
|
seek_offset +=
|
|
gst_buffer_store_get_size (typefind->store, seek_offset);
|
|
event =
|
|
gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_SET,
|
|
seek_offset);
|
|
if (gst_pad_send_event (GST_PAD_PEER (typefind->sink), event)) {
|
|
/* done seeking */
|
|
GST_DEBUG_OBJECT (typefind,
|
|
"'%s' was reset - seeked to %" G_GINT64_FORMAT,
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), seek_offset);
|
|
break;
|
|
} else if (entry->requested_offset < 0) {
|
|
/* impossible to seek */
|
|
GST_DEBUG_OBJECT (typefind,
|
|
"'%s' was reset - couldn't seek to %" G_GINT64_FORMAT,
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), seek_offset);
|
|
if (entry->probability == 0) {
|
|
free_entry (entry);
|
|
typefind->possibilities =
|
|
g_list_delete_link (typefind->possibilities, walk);
|
|
/* FIXME: too many gotos */
|
|
if (!typefind->possibilities)
|
|
goto error;
|
|
/* we modified the list, let's restart */
|
|
goto restart;
|
|
} else {
|
|
entry->requested_size = 0;
|
|
entry->requested_offset = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* throw out all entries that can't get more data */
|
|
walk = g_list_next (typefind->possibilities);
|
|
while (walk) {
|
|
GList *cur = walk;
|
|
|
|
entry = (TypeFindEntry *) walk->data;
|
|
walk = g_list_next (walk);
|
|
if (entry->requested_size == 0) {
|
|
GST_DEBUG_OBJECT (typefind,
|
|
"'%s' was removed - higher possibilities available",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory));
|
|
free_entry (entry);
|
|
typefind->possibilities =
|
|
g_list_delete_link (typefind->possibilities, cur);
|
|
}
|
|
}
|
|
if (g_list_next (typefind->possibilities) == NULL) {
|
|
entry = (TypeFindEntry *) typefind->possibilities->data;
|
|
if (entry->probability > typefind->min_probability) {
|
|
GST_INFO_OBJECT (typefind,
|
|
"'%s' is the only typefind left, using it now (probability %u)",
|
|
GST_PLUGIN_FEATURE_NAME (entry->factory), entry->probability);
|
|
g_signal_emit (typefind, gst_type_find_element_signals[HAVE_TYPE],
|
|
0, entry->probability, entry->caps);
|
|
free_entry (entry);
|
|
g_list_free (typefind->possibilities);
|
|
typefind->possibilities = NULL;
|
|
stop_typefinding (typefind);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
g_assert_not_reached ();
|
|
return;
|
|
}
|
|
}
|
|
static GstElementStateReturn
|
|
gst_type_find_element_change_state (GstElement * element)
|
|
{
|
|
GstTypeFindElement *typefind;
|
|
|
|
typefind = GST_TYPE_FIND_ELEMENT (element);
|
|
|
|
switch (GST_STATE_TRANSITION (element)) {
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
start_typefinding (typefind);
|
|
break;
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
stop_typefinding (typefind);
|
|
gst_caps_replace (&typefind->caps, NULL);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
}
|