+2004-01-20 Thomas Vander Stichele <thomas at apestaart dot org>
+
+ * gst/elements/Makefile.am:
+ * gst/elements/gsttypefindelement.c:
+ * gst/elements/gsttypefindelement.h:
+ renamed gsttypefindelement to gsttypefind, conserving CVS history
+
2004-01-20 Thomas Vander Stichele <thomas at apestaart dot org>
* gst/gsttag.c: (_gst_tag_initialize), (gst_tag_list_add_valist):
gstshaper.c \
gststatistics.c \
gsttee.c \
- gsttypefindelement.c
+ gsttypefind.c
libgstelements_la_CFLAGS = $(GST_CFLAGS)
libgstelements_la_LIBADD =
gstshaper.h \
gststatistics.h \
gsttee.h \
- gsttypefindelement.h
+ gsttypefind.h
+++ /dev/null
-/* GStreamer
- * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
- *
- * gsttypefind.c: element that detects type of stream
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/* FIXME: need a better solution for non-seekable streams */
-
-/* way of operation:
- * 1) get a list of all typefind functions sorted best to worst
- * 2) if all elements have been called with all requested data goto 8
- * 3) call all functions once with all available data
- * 4) if a function returns a value >= ARG_MAXIMUM goto 8
- * 5) all functions with a result > ARG_MINIMUM or functions that did not get
- * all requested data (where peek returned NULL) stay in list
- * 6) seek to requested offset of best function that still has open data
- * requests
- * 7) goto 2
- * 8) take best available result and use its caps
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include "gsttypefindelement.h"
-#include "gst/gst_private.h"
-#include "gst/gst-i18n-lib.h"
-
-#include <gst/gsttypefind.h>
-#include <gst/gstutils.h>
-#include <gst/gsterror.h>
-
-GST_DEBUG_CATEGORY_STATIC (gst_type_find_element_debug);
-#define GST_CAT_DEFAULT gst_type_find_element_debug
-
-GstElementDetails gst_type_find_element_details = GST_ELEMENT_DETAILS (
- "TypeFind",
- "Generic",
- "Finds the media type of a stream",
- "Benjamin Otte <in7y118@public.uni-hamburg.de>"
-);
-
-/* generic templates */
-GstStaticPadTemplate type_find_element_sink_template = GST_STATIC_PAD_TEMPLATE (
- "sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY
-);
-
-GstStaticPadTemplate type_find_element_src_template = GST_STATIC_PAD_TEMPLATE (
- "src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY
-);
-
-/* TypeFind signals and args */
-enum {
- HAVE_TYPE,
- LAST_SIGNAL
-};
-enum {
- ARG_0,
- ARG_CAPS,
- ARG_MINIMUM,
- ARG_MAXIMUM
-};
-enum {
- MODE_NORMAL, /* act as identity */
- MODE_TYPEFIND, /* do typefinding */
-};
-
-
-#define _do_init(bla) \
- GST_DEBUG_CATEGORY_INIT (gst_type_find_element_debug, "typefind", \
- GST_DEBUG_BG_YELLOW | GST_DEBUG_FG_GREEN, "type finding element");
-
-GST_BOILERPLATE_FULL (GstTypeFindElement, gst_type_find_element, GstElement, GST_TYPE_ELEMENT, _do_init);
-
-static void gst_type_find_element_dispose (GObject * object);
-static void gst_type_find_element_set_property (GObject * object,
- guint prop_id,
- const GValue * value,
- GParamSpec * pspec);
-static void gst_type_find_element_get_property (GObject * object,
- guint prop_id,
- GValue * value,
- GParamSpec * pspec);
-
-static const GstEventMask *
- gst_type_find_element_src_event_mask (GstPad * pad);
-static gboolean gst_type_find_element_src_event (GstPad * pad,
- GstEvent * event);
-
-static void gst_type_find_element_chain (GstPad * sinkpad,
- GstData * data);
-static GstElementStateReturn
- gst_type_find_element_change_state (GstElement * element);
-
-static guint gst_type_find_element_signals[LAST_SIGNAL] = { 0 };
-
-static void
-gst_type_find_element_have_type (GstTypeFindElement *typefind, guint probability, const GstCaps *caps)
-{
- gchar *caps_str;
-
- g_assert (typefind->caps == NULL);
- g_assert (caps != NULL);
-
- caps_str = gst_caps_to_string (caps);
- GST_INFO_OBJECT (typefind, "found caps %s", caps_str);
- g_free (caps_str);
- typefind->caps = gst_caps_copy (caps);
- gst_pad_set_explicit_caps (typefind->src, gst_caps_copy(caps));
-}
-static void
-gst_type_find_element_base_init (gpointer g_class)
-{
- GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details (gstelement_class, &gst_type_find_element_details);
-}
-static void
-gst_type_find_element_class_init (GstTypeFindElementClass *typefind_class)
-{
- GObjectClass *gobject_class = G_OBJECT_CLASS (typefind_class);
- GstElementClass *gstelement_class = GST_ELEMENT_CLASS (typefind_class);
-
- gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_type_find_element_set_property);
- gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_type_find_element_get_property);
- gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_type_find_element_dispose);
-
- typefind_class->have_type = gst_type_find_element_have_type;
-
- g_object_class_install_property (gobject_class, ARG_CAPS,
- g_param_spec_boxed ("caps", _("caps"), _("detected capabilities in stream"),
- gst_caps_get_type(), G_PARAM_READABLE));
- g_object_class_install_property (gobject_class, ARG_MINIMUM,
- g_param_spec_uint ("minimum", _("minimum"), "minimum probability required to accept caps",
- GST_TYPE_FIND_MINIMUM, GST_TYPE_FIND_MAXIMUM, GST_TYPE_FIND_MINIMUM, G_PARAM_READWRITE));
- g_object_class_install_property (gobject_class, ARG_MINIMUM,
- g_param_spec_uint ("maximum", _("maximum"), "probability to stop typefinding",
- GST_TYPE_FIND_MINIMUM, GST_TYPE_FIND_MAXIMUM, GST_TYPE_FIND_MAXIMUM, G_PARAM_READWRITE));
-
- gst_type_find_element_signals[HAVE_TYPE] = g_signal_new ("have_type",
- G_TYPE_FROM_CLASS (typefind_class), G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GstTypeFindElementClass, have_type), NULL, NULL,
- gst_marshal_VOID__UINT_POINTER, G_TYPE_NONE, 2,
- G_TYPE_UINT, G_TYPE_POINTER);
-
- gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_type_find_element_change_state);
-}
-static void
-gst_type_find_element_init (GstTypeFindElement *typefind)
-{
- /* sinkpad */
- typefind->sink = gst_pad_new_from_template (
- gst_static_pad_template_get (&type_find_element_sink_template), "sink");
- gst_pad_set_chain_function (typefind->sink,
- gst_type_find_element_chain);
- gst_element_add_pad (GST_ELEMENT (typefind), typefind->sink);
- /* srcpad */
- typefind->src = gst_pad_new_from_template (
- gst_static_pad_template_get (&type_find_element_src_template), "src");
- gst_pad_set_event_function (typefind->src, gst_type_find_element_src_event);
- gst_pad_set_event_mask_function (typefind->src, gst_type_find_element_src_event_mask);
- gst_pad_use_explicit_caps (typefind->src);
- gst_element_add_pad (GST_ELEMENT (typefind), typefind->src);
-
- typefind->caps = NULL;
- typefind->min_probability = 1;
- typefind->max_probability = GST_TYPE_FIND_MAXIMUM;
-
- typefind->store = gst_buffer_store_new ();
-
- GST_FLAG_SET (typefind, GST_ELEMENT_EVENT_AWARE);
-}
-static void
-gst_type_find_element_dispose (GObject *object)
-{
- GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (object);
-
- G_OBJECT_CLASS (parent_class)->dispose (object);
-
- if (typefind->store) {
- g_object_unref (typefind->store);
- typefind->store = NULL;
- }
-}
-static void
-gst_type_find_element_set_property (GObject *object, guint prop_id,
- const GValue *value, GParamSpec *pspec)
-{
- GstTypeFindElement *typefind;
-
- g_return_if_fail (GST_IS_TYPE_FIND_ELEMENT (object));
-
- typefind = GST_TYPE_FIND_ELEMENT (object);
-
- switch (prop_id) {
- case ARG_MINIMUM:
- typefind->min_probability = g_value_get_uint (value);
- g_object_notify (object, "minimum");
- break;
- case ARG_MAXIMUM:
- typefind->max_probability = g_value_get_uint (value);
- g_object_notify (object, "maximum");
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-static void
-gst_type_find_element_get_property (GObject *object, guint prop_id,
- GValue *value, GParamSpec *pspec)
-{
- GstTypeFindElement *typefind;
-
- g_return_if_fail (GST_IS_TYPE_FIND_ELEMENT (object));
-
- typefind = GST_TYPE_FIND_ELEMENT (object);
-
- switch (prop_id) {
- case ARG_CAPS:
- g_value_set_boxed (value, typefind->caps);
- break;
- case ARG_MINIMUM:
- g_value_set_uint (value, typefind->min_probability);
- break;
- case ARG_MAXIMUM:
- g_value_set_uint (value, typefind->max_probability);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-static const GstEventMask *
-gst_type_find_element_src_event_mask (GstPad *pad)
-{
- static const GstEventMask mask[] = {
- { GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_METHOD_CUR | GST_SEEK_METHOD_END | GST_SEEK_FLAG_FLUSH},
- /* add more if you want, event masks suck and need to die anyway */
- { 0, }
- };
-
- return mask;
-}
-static gboolean
-gst_type_find_element_src_event (GstPad *pad, GstEvent *event)
-{
- GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (GST_PAD_PARENT (pad));
-
- if (typefind->mode == MODE_TYPEFIND) {
- /* need to do more? */
- gst_data_unref (GST_DATA (event));
- return FALSE;
- }
- return gst_pad_event_default (pad, event);
-}
-typedef struct {
- GstTypeFindFactory * factory;
- gint probability;
- GstCaps * caps;
- gint64 requested_offset;
- guint requested_size;
-
- GList * buffers;
- GstTypeFindElement * self;
-} TypeFindEntry;
-static void
-free_entry_buffers (TypeFindEntry *entry)
-{
- g_list_foreach (entry->buffers, (GFunc) gst_data_unref, NULL);
- g_list_free (entry->buffers);
- entry->buffers = NULL;
-}
-static void
-free_entry (TypeFindEntry *entry)
-{
- free_entry_buffers (entry);
-
- if (entry->caps)
- gst_caps_free (entry->caps);
- g_free (entry);
-}
-static void
-start_typefinding (GstTypeFindElement *typefind)
-{
- g_assert (typefind->caps == NULL);
- g_assert (typefind->possibilities == NULL);
-
- GST_DEBUG_OBJECT (typefind, "starting typefinding");
- typefind->mode = MODE_TYPEFIND;
- typefind->stream_length_available = TRUE;
- typefind->stream_length = 0;
-}
-static void
-stop_typefinding (GstTypeFindElement *typefind)
-{
- /* stop all typefinding and set mode back to normal */
- gboolean push_cached_buffers = gst_element_get_state (GST_ELEMENT (typefind)) == GST_STATE_PLAYING;
-
- GST_DEBUG_OBJECT (typefind, "stopping typefinding%s", push_cached_buffers ? " and pushing cached buffers" : "");
- if (typefind->possibilities != NULL) {
- /* this should only happen on PAUSED => READY or EOS */
- GST_LOG_OBJECT (typefind, "freeing remaining %u typefind functions", g_list_length (typefind->possibilities));
- g_list_foreach (typefind->possibilities, (GFunc) free_entry, NULL);
- g_list_free (typefind->possibilities);
- typefind->possibilities = NULL;
- }
-
- typefind->mode = MODE_NORMAL;
-
- if (push_cached_buffers) {
- GstBuffer *buffer;
- guint size = gst_buffer_store_get_size (typefind->store, 0);
-
- GST_LOG_OBJECT (typefind, "seeking back to current position %u", size);
- if (!gst_pad_send_event (GST_PAD_PEER (typefind->sink),
- gst_event_new_seek (GST_SEEK_METHOD_SET | GST_FORMAT_BYTES, size))) {
- GST_WARNING_OBJECT (typefind, "could not seek to required position %u, hope for the best", size);
- }
- if (size && (buffer = gst_buffer_store_get_buffer (typefind->store, 0, size))) {
- gst_pad_push (typefind->src, GST_DATA (buffer));
- } else {
- size = 0;
- }
- }
- gst_buffer_store_clear (typefind->store);
-}
-static guint64
-find_element_get_length (gpointer data)
-{
- TypeFindEntry *entry = (TypeFindEntry *) data;
- GstTypeFindElement *typefind = entry->self;
- GstFormat format = GST_FORMAT_BYTES;
-
- if (!typefind->stream_length_available) {
- GST_LOG_OBJECT (entry->self, "'%s' called get_length () but we know it's not available",
- GST_PLUGIN_FEATURE_NAME (entry->factory));
- return 0;
- }
- if (entry->self->stream_length == 0) {
- typefind->stream_length_available = gst_pad_query (GST_PAD_PEER (entry->self->sink), GST_QUERY_TOTAL,
- &format, &entry->self->stream_length);
- if (format != GST_FORMAT_BYTES)
- typefind->stream_length_available = FALSE;
- if (!typefind->stream_length_available) {
- GST_DEBUG_OBJECT (entry->self, "'%s' called get_length () but it's not available",
- GST_PLUGIN_FEATURE_NAME (entry->factory));
- return 0;
- } else {
- GST_DEBUG_OBJECT (entry->self, "'%s' called get_length () and it's %"G_GUINT64_FORMAT" bytes",
- GST_PLUGIN_FEATURE_NAME (entry->factory), entry->self->stream_length);
- }
- }
-
- 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));
-
- if (typefind->mode == MODE_TYPEFIND) {
- /* need to do more? */
- 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);
- gst_pad_event_default (pad, event);
- break;
- default:
- gst_data_unref (GST_DATA (event));
- break;
- }
- } else {
- gst_pad_event_default (pad, event);
- }
-}
-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)
-{
- gchar *str;
- TypeFindEntry *entry = (TypeFindEntry *) data;
-
- str = gst_caps_to_string (caps);
- GST_LOG_OBJECT (entry->self, "'%s' called suggest (%u, %s)",
- GST_PLUGIN_FEATURE_NAME (entry->factory), probability, str);
- g_free (str);
- 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_TYPEFIND: {
- gst_buffer_store_add_buffer (typefind->store, GST_BUFFER (data));
- 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 = g_new0 (TypeFindEntry, 1);
-
- 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;
-
- found_caps = gst_caps_copy (found_caps);
- 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);
- gst_caps_free (found_caps);
- } 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) {
- gst_element_error (typefind, STREAM, TYPE_NOT_FOUND,
- NULL, NULL);
- } else {
- /* set up typefind element for next iteration */
- typefind->possibilities = g_list_sort (typefind->possibilities, compare_type_find_entry);
-
- walk = typefind->possibilities;
- while (walk) {
- entry = (TypeFindEntry *) walk->data;
- walk = g_list_next (walk);
- 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);
- 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);
-}
+++ /dev/null
-/* GStreamer
- * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
- *
- * gsttypefind.h: element that detects type of stream
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-
-#ifndef __GST_TYPE_FIND_ELEMENT_H__
-#define __GST_TYPE_FIND_ELEMENT_H__
-
-#include <gst/gstinfo.h>
-#include <gst/gstelement.h>
-/* #include <gst/gstbufferstore.h> */
-#include "gstbufferstore.h"
-
-G_BEGIN_DECLS
-
-
-
-#define GST_TYPE_TYPE_FIND_ELEMENT (gst_type_find_element_get_type ())
-#define GST_TYPE_FIND_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TYPE_FIND_ELEMENT, GstTypeFindElement))
-#define GST_IS_TYPE_FIND_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TYPE_FIND_ELEMENT))
-#define GST_TYPE_FIND_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_TYPE_FIND_ELEMENT, GstTypeFindElementClass))
-#define GST_IS_TYPE_FIND_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_TYPE_FIND_ELEMENT))
-#define GST_TYPE_FIND_ELEMENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_TYPE_FIND_ELEMENT, GstTypeFindElementClass))
-
-typedef struct _GstTypeFindElement GstTypeFindElement;
-typedef struct _GstTypeFindElementClass GstTypeFindElementClass;
-
-struct _GstTypeFindElement {
- GstElement element;
-
- GstPad * sink;
- GstPad * src;
-
- guint min_probability;
- guint max_probability;
- GstCaps * caps;
-
- guint mode;
- GstBufferStore * store;
- guint64 stream_length;
- gboolean stream_length_available;
-
- GList * possibilities;
-};
-
-struct _GstTypeFindElementClass {
- GstElementClass parent_class;
-
- /* signals */
- void (*have_type) (GstTypeFindElement *element,
- guint probability,
- const GstCaps * caps);
-};
-
-GType gst_type_find_element_get_type (void);
-
-G_END_DECLS
-
-#endif /* __GST_TYPE_FIND_ELEMENT_H__ */
gstshaper.c \
gststatistics.c \
gsttee.c \
- gsttypefindelement.c
+ gsttypefind.c
libgstelements_la_CFLAGS = $(GST_CFLAGS)
libgstelements_la_LIBADD =
gstshaper.h \
gststatistics.h \
gsttee.h \
- gsttypefindelement.h
+ gsttypefind.h
+++ /dev/null
-/* GStreamer
- * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
- *
- * gsttypefind.c: element that detects type of stream
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/* FIXME: need a better solution for non-seekable streams */
-
-/* way of operation:
- * 1) get a list of all typefind functions sorted best to worst
- * 2) if all elements have been called with all requested data goto 8
- * 3) call all functions once with all available data
- * 4) if a function returns a value >= ARG_MAXIMUM goto 8
- * 5) all functions with a result > ARG_MINIMUM or functions that did not get
- * all requested data (where peek returned NULL) stay in list
- * 6) seek to requested offset of best function that still has open data
- * requests
- * 7) goto 2
- * 8) take best available result and use its caps
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include "gsttypefindelement.h"
-#include "gst/gst_private.h"
-#include "gst/gst-i18n-lib.h"
-
-#include <gst/gsttypefind.h>
-#include <gst/gstutils.h>
-#include <gst/gsterror.h>
-
-GST_DEBUG_CATEGORY_STATIC (gst_type_find_element_debug);
-#define GST_CAT_DEFAULT gst_type_find_element_debug
-
-GstElementDetails gst_type_find_element_details = GST_ELEMENT_DETAILS (
- "TypeFind",
- "Generic",
- "Finds the media type of a stream",
- "Benjamin Otte <in7y118@public.uni-hamburg.de>"
-);
-
-/* generic templates */
-GstStaticPadTemplate type_find_element_sink_template = GST_STATIC_PAD_TEMPLATE (
- "sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY
-);
-
-GstStaticPadTemplate type_find_element_src_template = GST_STATIC_PAD_TEMPLATE (
- "src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS_ANY
-);
-
-/* TypeFind signals and args */
-enum {
- HAVE_TYPE,
- LAST_SIGNAL
-};
-enum {
- ARG_0,
- ARG_CAPS,
- ARG_MINIMUM,
- ARG_MAXIMUM
-};
-enum {
- MODE_NORMAL, /* act as identity */
- MODE_TYPEFIND, /* do typefinding */
-};
-
-
-#define _do_init(bla) \
- GST_DEBUG_CATEGORY_INIT (gst_type_find_element_debug, "typefind", \
- GST_DEBUG_BG_YELLOW | GST_DEBUG_FG_GREEN, "type finding element");
-
-GST_BOILERPLATE_FULL (GstTypeFindElement, gst_type_find_element, GstElement, GST_TYPE_ELEMENT, _do_init);
-
-static void gst_type_find_element_dispose (GObject * object);
-static void gst_type_find_element_set_property (GObject * object,
- guint prop_id,
- const GValue * value,
- GParamSpec * pspec);
-static void gst_type_find_element_get_property (GObject * object,
- guint prop_id,
- GValue * value,
- GParamSpec * pspec);
-
-static const GstEventMask *
- gst_type_find_element_src_event_mask (GstPad * pad);
-static gboolean gst_type_find_element_src_event (GstPad * pad,
- GstEvent * event);
-
-static void gst_type_find_element_chain (GstPad * sinkpad,
- GstData * data);
-static GstElementStateReturn
- gst_type_find_element_change_state (GstElement * element);
-
-static guint gst_type_find_element_signals[LAST_SIGNAL] = { 0 };
-
-static void
-gst_type_find_element_have_type (GstTypeFindElement *typefind, guint probability, const GstCaps *caps)
-{
- gchar *caps_str;
-
- g_assert (typefind->caps == NULL);
- g_assert (caps != NULL);
-
- caps_str = gst_caps_to_string (caps);
- GST_INFO_OBJECT (typefind, "found caps %s", caps_str);
- g_free (caps_str);
- typefind->caps = gst_caps_copy (caps);
- gst_pad_set_explicit_caps (typefind->src, gst_caps_copy(caps));
-}
-static void
-gst_type_find_element_base_init (gpointer g_class)
-{
- GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details (gstelement_class, &gst_type_find_element_details);
-}
-static void
-gst_type_find_element_class_init (GstTypeFindElementClass *typefind_class)
-{
- GObjectClass *gobject_class = G_OBJECT_CLASS (typefind_class);
- GstElementClass *gstelement_class = GST_ELEMENT_CLASS (typefind_class);
-
- gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_type_find_element_set_property);
- gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_type_find_element_get_property);
- gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_type_find_element_dispose);
-
- typefind_class->have_type = gst_type_find_element_have_type;
-
- g_object_class_install_property (gobject_class, ARG_CAPS,
- g_param_spec_boxed ("caps", _("caps"), _("detected capabilities in stream"),
- gst_caps_get_type(), G_PARAM_READABLE));
- g_object_class_install_property (gobject_class, ARG_MINIMUM,
- g_param_spec_uint ("minimum", _("minimum"), "minimum probability required to accept caps",
- GST_TYPE_FIND_MINIMUM, GST_TYPE_FIND_MAXIMUM, GST_TYPE_FIND_MINIMUM, G_PARAM_READWRITE));
- g_object_class_install_property (gobject_class, ARG_MINIMUM,
- g_param_spec_uint ("maximum", _("maximum"), "probability to stop typefinding",
- GST_TYPE_FIND_MINIMUM, GST_TYPE_FIND_MAXIMUM, GST_TYPE_FIND_MAXIMUM, G_PARAM_READWRITE));
-
- gst_type_find_element_signals[HAVE_TYPE] = g_signal_new ("have_type",
- G_TYPE_FROM_CLASS (typefind_class), G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GstTypeFindElementClass, have_type), NULL, NULL,
- gst_marshal_VOID__UINT_POINTER, G_TYPE_NONE, 2,
- G_TYPE_UINT, G_TYPE_POINTER);
-
- gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_type_find_element_change_state);
-}
-static void
-gst_type_find_element_init (GstTypeFindElement *typefind)
-{
- /* sinkpad */
- typefind->sink = gst_pad_new_from_template (
- gst_static_pad_template_get (&type_find_element_sink_template), "sink");
- gst_pad_set_chain_function (typefind->sink,
- gst_type_find_element_chain);
- gst_element_add_pad (GST_ELEMENT (typefind), typefind->sink);
- /* srcpad */
- typefind->src = gst_pad_new_from_template (
- gst_static_pad_template_get (&type_find_element_src_template), "src");
- gst_pad_set_event_function (typefind->src, gst_type_find_element_src_event);
- gst_pad_set_event_mask_function (typefind->src, gst_type_find_element_src_event_mask);
- gst_pad_use_explicit_caps (typefind->src);
- gst_element_add_pad (GST_ELEMENT (typefind), typefind->src);
-
- typefind->caps = NULL;
- typefind->min_probability = 1;
- typefind->max_probability = GST_TYPE_FIND_MAXIMUM;
-
- typefind->store = gst_buffer_store_new ();
-
- GST_FLAG_SET (typefind, GST_ELEMENT_EVENT_AWARE);
-}
-static void
-gst_type_find_element_dispose (GObject *object)
-{
- GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (object);
-
- G_OBJECT_CLASS (parent_class)->dispose (object);
-
- if (typefind->store) {
- g_object_unref (typefind->store);
- typefind->store = NULL;
- }
-}
-static void
-gst_type_find_element_set_property (GObject *object, guint prop_id,
- const GValue *value, GParamSpec *pspec)
-{
- GstTypeFindElement *typefind;
-
- g_return_if_fail (GST_IS_TYPE_FIND_ELEMENT (object));
-
- typefind = GST_TYPE_FIND_ELEMENT (object);
-
- switch (prop_id) {
- case ARG_MINIMUM:
- typefind->min_probability = g_value_get_uint (value);
- g_object_notify (object, "minimum");
- break;
- case ARG_MAXIMUM:
- typefind->max_probability = g_value_get_uint (value);
- g_object_notify (object, "maximum");
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-static void
-gst_type_find_element_get_property (GObject *object, guint prop_id,
- GValue *value, GParamSpec *pspec)
-{
- GstTypeFindElement *typefind;
-
- g_return_if_fail (GST_IS_TYPE_FIND_ELEMENT (object));
-
- typefind = GST_TYPE_FIND_ELEMENT (object);
-
- switch (prop_id) {
- case ARG_CAPS:
- g_value_set_boxed (value, typefind->caps);
- break;
- case ARG_MINIMUM:
- g_value_set_uint (value, typefind->min_probability);
- break;
- case ARG_MAXIMUM:
- g_value_set_uint (value, typefind->max_probability);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-static const GstEventMask *
-gst_type_find_element_src_event_mask (GstPad *pad)
-{
- static const GstEventMask mask[] = {
- { GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_METHOD_CUR | GST_SEEK_METHOD_END | GST_SEEK_FLAG_FLUSH},
- /* add more if you want, event masks suck and need to die anyway */
- { 0, }
- };
-
- return mask;
-}
-static gboolean
-gst_type_find_element_src_event (GstPad *pad, GstEvent *event)
-{
- GstTypeFindElement *typefind = GST_TYPE_FIND_ELEMENT (GST_PAD_PARENT (pad));
-
- if (typefind->mode == MODE_TYPEFIND) {
- /* need to do more? */
- gst_data_unref (GST_DATA (event));
- return FALSE;
- }
- return gst_pad_event_default (pad, event);
-}
-typedef struct {
- GstTypeFindFactory * factory;
- gint probability;
- GstCaps * caps;
- gint64 requested_offset;
- guint requested_size;
-
- GList * buffers;
- GstTypeFindElement * self;
-} TypeFindEntry;
-static void
-free_entry_buffers (TypeFindEntry *entry)
-{
- g_list_foreach (entry->buffers, (GFunc) gst_data_unref, NULL);
- g_list_free (entry->buffers);
- entry->buffers = NULL;
-}
-static void
-free_entry (TypeFindEntry *entry)
-{
- free_entry_buffers (entry);
-
- if (entry->caps)
- gst_caps_free (entry->caps);
- g_free (entry);
-}
-static void
-start_typefinding (GstTypeFindElement *typefind)
-{
- g_assert (typefind->caps == NULL);
- g_assert (typefind->possibilities == NULL);
-
- GST_DEBUG_OBJECT (typefind, "starting typefinding");
- typefind->mode = MODE_TYPEFIND;
- typefind->stream_length_available = TRUE;
- typefind->stream_length = 0;
-}
-static void
-stop_typefinding (GstTypeFindElement *typefind)
-{
- /* stop all typefinding and set mode back to normal */
- gboolean push_cached_buffers = gst_element_get_state (GST_ELEMENT (typefind)) == GST_STATE_PLAYING;
-
- GST_DEBUG_OBJECT (typefind, "stopping typefinding%s", push_cached_buffers ? " and pushing cached buffers" : "");
- if (typefind->possibilities != NULL) {
- /* this should only happen on PAUSED => READY or EOS */
- GST_LOG_OBJECT (typefind, "freeing remaining %u typefind functions", g_list_length (typefind->possibilities));
- g_list_foreach (typefind->possibilities, (GFunc) free_entry, NULL);
- g_list_free (typefind->possibilities);
- typefind->possibilities = NULL;
- }
-
- typefind->mode = MODE_NORMAL;
-
- if (push_cached_buffers) {
- GstBuffer *buffer;
- guint size = gst_buffer_store_get_size (typefind->store, 0);
-
- GST_LOG_OBJECT (typefind, "seeking back to current position %u", size);
- if (!gst_pad_send_event (GST_PAD_PEER (typefind->sink),
- gst_event_new_seek (GST_SEEK_METHOD_SET | GST_FORMAT_BYTES, size))) {
- GST_WARNING_OBJECT (typefind, "could not seek to required position %u, hope for the best", size);
- }
- if (size && (buffer = gst_buffer_store_get_buffer (typefind->store, 0, size))) {
- gst_pad_push (typefind->src, GST_DATA (buffer));
- } else {
- size = 0;
- }
- }
- gst_buffer_store_clear (typefind->store);
-}
-static guint64
-find_element_get_length (gpointer data)
-{
- TypeFindEntry *entry = (TypeFindEntry *) data;
- GstTypeFindElement *typefind = entry->self;
- GstFormat format = GST_FORMAT_BYTES;
-
- if (!typefind->stream_length_available) {
- GST_LOG_OBJECT (entry->self, "'%s' called get_length () but we know it's not available",
- GST_PLUGIN_FEATURE_NAME (entry->factory));
- return 0;
- }
- if (entry->self->stream_length == 0) {
- typefind->stream_length_available = gst_pad_query (GST_PAD_PEER (entry->self->sink), GST_QUERY_TOTAL,
- &format, &entry->self->stream_length);
- if (format != GST_FORMAT_BYTES)
- typefind->stream_length_available = FALSE;
- if (!typefind->stream_length_available) {
- GST_DEBUG_OBJECT (entry->self, "'%s' called get_length () but it's not available",
- GST_PLUGIN_FEATURE_NAME (entry->factory));
- return 0;
- } else {
- GST_DEBUG_OBJECT (entry->self, "'%s' called get_length () and it's %"G_GUINT64_FORMAT" bytes",
- GST_PLUGIN_FEATURE_NAME (entry->factory), entry->self->stream_length);
- }
- }
-
- 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));
-
- if (typefind->mode == MODE_TYPEFIND) {
- /* need to do more? */
- 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);
- gst_pad_event_default (pad, event);
- break;
- default:
- gst_data_unref (GST_DATA (event));
- break;
- }
- } else {
- gst_pad_event_default (pad, event);
- }
-}
-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)
-{
- gchar *str;
- TypeFindEntry *entry = (TypeFindEntry *) data;
-
- str = gst_caps_to_string (caps);
- GST_LOG_OBJECT (entry->self, "'%s' called suggest (%u, %s)",
- GST_PLUGIN_FEATURE_NAME (entry->factory), probability, str);
- g_free (str);
- 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_TYPEFIND: {
- gst_buffer_store_add_buffer (typefind->store, GST_BUFFER (data));
- 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 = g_new0 (TypeFindEntry, 1);
-
- 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;
-
- found_caps = gst_caps_copy (found_caps);
- 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);
- gst_caps_free (found_caps);
- } 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) {
- gst_element_error (typefind, STREAM, TYPE_NOT_FOUND,
- NULL, NULL);
- } else {
- /* set up typefind element for next iteration */
- typefind->possibilities = g_list_sort (typefind->possibilities, compare_type_find_entry);
-
- walk = typefind->possibilities;
- while (walk) {
- entry = (TypeFindEntry *) walk->data;
- walk = g_list_next (walk);
- 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);
- 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);
-}
+++ /dev/null
-/* GStreamer
- * Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
- *
- * gsttypefind.h: element that detects type of stream
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-
-#ifndef __GST_TYPE_FIND_ELEMENT_H__
-#define __GST_TYPE_FIND_ELEMENT_H__
-
-#include <gst/gstinfo.h>
-#include <gst/gstelement.h>
-/* #include <gst/gstbufferstore.h> */
-#include "gstbufferstore.h"
-
-G_BEGIN_DECLS
-
-
-
-#define GST_TYPE_TYPE_FIND_ELEMENT (gst_type_find_element_get_type ())
-#define GST_TYPE_FIND_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TYPE_FIND_ELEMENT, GstTypeFindElement))
-#define GST_IS_TYPE_FIND_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TYPE_FIND_ELEMENT))
-#define GST_TYPE_FIND_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_TYPE_FIND_ELEMENT, GstTypeFindElementClass))
-#define GST_IS_TYPE_FIND_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_TYPE_FIND_ELEMENT))
-#define GST_TYPE_FIND_ELEMENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_TYPE_FIND_ELEMENT, GstTypeFindElementClass))
-
-typedef struct _GstTypeFindElement GstTypeFindElement;
-typedef struct _GstTypeFindElementClass GstTypeFindElementClass;
-
-struct _GstTypeFindElement {
- GstElement element;
-
- GstPad * sink;
- GstPad * src;
-
- guint min_probability;
- guint max_probability;
- GstCaps * caps;
-
- guint mode;
- GstBufferStore * store;
- guint64 stream_length;
- gboolean stream_length_available;
-
- GList * possibilities;
-};
-
-struct _GstTypeFindElementClass {
- GstElementClass parent_class;
-
- /* signals */
- void (*have_type) (GstTypeFindElement *element,
- guint probability,
- const GstCaps * caps);
-};
-
-GType gst_type_find_element_get_type (void);
-
-G_END_DECLS
-
-#endif /* __GST_TYPE_FIND_ELEMENT_H__ */
projects / platform / upstream / gstreamer.git / commitdiff