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Original commit message from CVS: * check/gst/gstiterator.c: (GST_START_TEST): * gst/gstbin.c: (gst_bin_iterate_elements), (gst_bin_iterate_recurse), (gst_bin_iterate_sorted): * gst/gstelement.c: (gst_element_iterate_pads): * gst/gstformat.c: (gst_format_iterate_definitions): * gst/gstiterator.c: (gst_iterator_init), (gst_iterator_new), (gst_iterator_new_list), (gst_iterator_filter): * gst/gstiterator.h: * gst/gstquery.c: (gst_query_type_iterate_definitions): Add a GType to GstIterator, update callsites and tests.
211 lines
5.6 KiB
C
211 lines
5.6 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstformat.c: GstFormat registration
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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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/**
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* SECTION:gstformat
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* @short_description: Dynamically register new data formats
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* @see_also: #GstPad, #GstElement
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*
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* GstFormats functions are used to register a new format to the gstreamer core.
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* Formats can be used to perform seeking or conversions/query operations.
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*/
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#include <string.h>
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#include "gst_private.h"
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#include "gstformat.h"
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static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
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static GList *_gst_formats = NULL;
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static GHashTable *_nick_to_format = NULL;
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static GHashTable *_format_to_nick = NULL;
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static guint32 _n_values = 1; /* we start from 1 because 0 reserved for UNDEFINED */
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static GstFormatDefinition standard_definitions[] = {
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{GST_FORMAT_DEFAULT, "default", "Default format for the media type"},
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{GST_FORMAT_BYTES, "bytes", "Bytes"},
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{GST_FORMAT_TIME, "time", "Time"},
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{GST_FORMAT_BUFFERS, "buffers", "Buffers"},
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{GST_FORMAT_PERCENT, "percent", "Percent"},
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{0, NULL, NULL}
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};
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void
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_gst_format_initialize (void)
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{
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GstFormatDefinition *standards = standard_definitions;
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g_static_mutex_lock (&mutex);
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if (_nick_to_format == NULL) {
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_nick_to_format = g_hash_table_new (g_str_hash, g_str_equal);
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_format_to_nick = g_hash_table_new (NULL, NULL);
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}
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while (standards->nick) {
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g_hash_table_insert (_nick_to_format, standards->nick, standards);
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g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (standards->value),
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standards);
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_gst_formats = g_list_append (_gst_formats, standards);
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standards++;
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_n_values++;
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}
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g_static_mutex_unlock (&mutex);
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}
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/**
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* gst_format_register:
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* @nick: The nick of the new format
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* @description: The description of the new format
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*
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* Create a new GstFormat based on the nick or return an
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* already registered format with that nick.
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*
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* Returns: A new GstFormat or an already registered format
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* with the same nick.
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*
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* MT safe.
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*/
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GstFormat
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gst_format_register (const gchar * nick, const gchar * description)
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{
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GstFormatDefinition *format;
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GstFormat query;
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g_return_val_if_fail (nick != NULL, 0);
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g_return_val_if_fail (description != NULL, 0);
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query = gst_format_get_by_nick (nick);
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if (query != GST_FORMAT_UNDEFINED)
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return query;
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format = g_new0 (GstFormatDefinition, 1);
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format->value = _n_values;
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format->nick = g_strdup (nick);
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format->description = g_strdup (description);
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g_static_mutex_lock (&mutex);
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g_hash_table_insert (_nick_to_format, format->nick, format);
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g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (format->value),
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format);
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_gst_formats = g_list_append (_gst_formats, format);
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_n_values++;
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g_static_mutex_unlock (&mutex);
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return format->value;
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}
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/**
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* gst_format_get_by_nick:
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* @nick: The nick of the format
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*
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* Return the format registered with the given nick.
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*
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* Returns: The format with @nick or GST_FORMAT_UNDEFINED
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* if the format was not registered.
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*/
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GstFormat
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gst_format_get_by_nick (const gchar * nick)
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{
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GstFormatDefinition *format;
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g_return_val_if_fail (nick != NULL, 0);
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g_static_mutex_lock (&mutex);
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format = g_hash_table_lookup (_nick_to_format, nick);
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g_static_mutex_unlock (&mutex);
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if (format != NULL)
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return format->value;
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else
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return GST_FORMAT_UNDEFINED;
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}
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/**
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* gst_formats_contains:
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* @formats: The format array to search
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* @format: the format to find
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*
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* See if the given format is inside the format array.
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*
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* Returns: TRUE if the format is found inside the array
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*/
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gboolean
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gst_formats_contains (const GstFormat * formats, GstFormat format)
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{
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if (!formats)
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return FALSE;
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while (*formats) {
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if (*formats == format)
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return TRUE;
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formats++;
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}
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return FALSE;
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}
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/**
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* gst_format_get_details:
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* @format: The format to get details of
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*
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* Get details about the given format.
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*
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* Returns: The #GstFormatDefinition for @format or NULL on failure.
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*
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* MT safe.
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*/
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const GstFormatDefinition *
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gst_format_get_details (GstFormat format)
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{
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const GstFormatDefinition *result;
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g_static_mutex_lock (&mutex);
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result = g_hash_table_lookup (_format_to_nick, GINT_TO_POINTER (format));
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g_static_mutex_unlock (&mutex);
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return result;
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}
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/**
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* gst_format_iterate_definitions:
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*
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* Iterate all the registered formats. The format definition is read
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* only.
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*
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* Returns: A GstIterator of #GstFormatDefinition.
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*/
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GstIterator *
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gst_format_iterate_definitions (void)
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{
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GstIterator *result;
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g_static_mutex_lock (&mutex);
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/* FIXME: register a boxed type for GstFormatDefinition */
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result = gst_iterator_new_list (G_TYPE_POINTER,
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g_static_mutex_get_mutex (&mutex), &_n_values, &_gst_formats,
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NULL, NULL, NULL);
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g_static_mutex_unlock (&mutex);
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return result;
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}
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