X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gst%2Fgstformat.c;h=130fc77f1850e7ed0825a275826a1af08667027b;hb=dac5966da6a0f53d0443dfa1ac239289028c415d;hp=bded68b9598625967be9999742c20ece13a3561a;hpb=d9e856160f80e7211ff6c81f673cb910bf7a07e1;p=platform%2Fupstream%2Fgstreamer.git diff --git a/gst/gstformat.c b/gst/gstformat.c index bded68b..130fc77 100644 --- a/gst/gstformat.c +++ b/gst/gstformat.c @@ -1,6 +1,7 @@ /* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans + * 2005 Wim Taymans * * gstformat.c: GstFormat registration * @@ -16,46 +17,113 @@ * * 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. + * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +/** + * SECTION:gstformat + * @title: GstFormat + * @short_description: Dynamically register new data formats + * @see_also: #GstPad, #GstElement + * + * GstFormats functions are used to register a new format to the gstreamer + * core. Formats can be used to perform seeking or conversions/query + * operations. */ -#include "gstlog.h" +#include "gst_private.h" +#include #include "gstformat.h" +#include "gstenumtypes.h" +static GMutex mutex; static GList *_gst_formats = NULL; -static gint _n_values = 1; /* we start from 1 because 0 reserved for UNDEFINED */ - -typedef struct _GstFormatDefinition GstFormatDefinition; - -struct _GstFormatDefinition -{ - GstFormat value; - gchar *nick; - gchar *description; -}; +static GHashTable *_nick_to_format = NULL; +static GHashTable *_format_to_nick = NULL; +static guint32 _n_values = 1; /* we start from 1 because 0 reserved for UNDEFINED */ static GstFormatDefinition standard_definitions[] = { - { GST_FORMAT_DEFAULT, "default", "Default" }, - { GST_FORMAT_BYTES, "bytes", "Bytes" }, - { GST_FORMAT_TIME, "time", "Time" }, - { GST_FORMAT_BUFFERS, "buffers", "Buffers" }, - { GST_FORMAT_PERCENT, "percent", "Percent" }, - { GST_FORMAT_UNITS, "units", "Units as defined by the media type" }, - { 0, NULL, NULL } + {GST_FORMAT_DEFAULT, "default", "Default format for the media type", 0}, + {GST_FORMAT_BYTES, "bytes", "Bytes", 0}, + {GST_FORMAT_TIME, "time", "Time", 0}, + {GST_FORMAT_BUFFERS, "buffers", "Buffers", 0}, + {GST_FORMAT_PERCENT, "percent", "Percent", 0}, + {GST_FORMAT_UNDEFINED, NULL, NULL, 0} }; -void -_gst_format_initialize (void) +void +_priv_gst_format_initialize (void) { GstFormatDefinition *standards = standard_definitions; + g_mutex_lock (&mutex); + if (_nick_to_format == NULL) { + _nick_to_format = g_hash_table_new (g_str_hash, g_str_equal); + _format_to_nick = g_hash_table_new (NULL, NULL); + } + while (standards->nick) { - _gst_formats = g_list_prepend (_gst_formats, standards); + standards->quark = g_quark_from_static_string (standards->nick); + g_hash_table_insert (_nick_to_format, (gpointer) standards->nick, + standards); + g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (standards->value), + standards); + + _gst_formats = g_list_append (_gst_formats, standards); standards++; _n_values++; } + /* getting the type registers the enum */ + g_type_class_ref (gst_format_get_type ()); + g_mutex_unlock (&mutex); +} + +/** + * gst_format_get_name: + * @format: a #GstFormat + * + * Get a printable name for the given format. Do not modify or free. + * + * Returns: (nullable): a reference to the static name of the format + * or %NULL if the format is unknown. + */ +const gchar * +gst_format_get_name (GstFormat format) +{ + const GstFormatDefinition *def; + const gchar *result; + + if ((def = gst_format_get_details (format)) != NULL) + result = def->nick; + else + result = NULL; + + return result; +} + +/** + * gst_format_to_quark: + * @format: a #GstFormat + * + * Get the unique quark for the given format. + * + * Returns: the quark associated with the format or 0 if the format + * is unknown. + */ +GQuark +gst_format_to_quark (GstFormat format) +{ + const GstFormatDefinition *def; + GQuark result; + + if ((def = gst_format_get_details (format)) != NULL) + result = def->quark; + else + result = 0; + + return result; } /** @@ -64,33 +132,40 @@ _gst_format_initialize (void) * @description: The description of the new format * * Create a new GstFormat based on the nick or return an - * allrady registered format with that nick + * already registered format with that nick. * * Returns: A new GstFormat or an already registered format * with the same nick. + * + * MT safe. */ GstFormat -gst_format_register (const gchar *nick, const gchar *description) +gst_format_register (const gchar * nick, const gchar * description) { GstFormatDefinition *format; GstFormat query; - - g_return_val_if_fail (nick != NULL, 0); - g_return_val_if_fail (description != NULL, 0); + + g_return_val_if_fail (nick != NULL, GST_FORMAT_UNDEFINED); + g_return_val_if_fail (description != NULL, GST_FORMAT_UNDEFINED); query = gst_format_get_by_nick (nick); if (query != GST_FORMAT_UNDEFINED) return query; - - format = g_new0 (GstFormatDefinition, 1); - format->value = _n_values; + + g_mutex_lock (&mutex); + format = g_slice_new (GstFormatDefinition); + format->value = (GstFormat) _n_values; format->nick = g_strdup (nick); format->description = g_strdup (description); + format->quark = g_quark_from_static_string (format->nick); - _gst_formats = g_list_prepend (_gst_formats, format); - + g_hash_table_insert (_nick_to_format, (gpointer) format->nick, format); + g_hash_table_insert (_format_to_nick, GINT_TO_POINTER (format->value), + format); + _gst_formats = g_list_append (_gst_formats, format); _n_values++; - + g_mutex_unlock (&mutex); + return format->value; } @@ -98,65 +173,94 @@ gst_format_register (const gchar *nick, const gchar *description) * gst_format_get_by_nick: * @nick: The nick of the format * - * Return the format registered with the given nick. + * Return the format registered with the given nick. * * Returns: The format with @nick or GST_FORMAT_UNDEFINED * if the format was not registered. */ GstFormat -gst_format_get_by_nick (const gchar *nick) +gst_format_get_by_nick (const gchar * nick) { - GList *walk; GstFormatDefinition *format; - - g_return_val_if_fail (nick != NULL, 0); - walk = _gst_formats; + g_return_val_if_fail (nick != NULL, GST_FORMAT_UNDEFINED); - while (walk) { - format = (GstFormatDefinition *) walk->data; - - if (!strcmp (format->nick, nick)) - return format->value; + g_mutex_lock (&mutex); + format = g_hash_table_lookup (_nick_to_format, nick); + g_mutex_unlock (&mutex); - walk = g_list_next (walk); - } + if (format != NULL) + return format->value; + else + return GST_FORMAT_UNDEFINED; +} + +/** + * gst_formats_contains: + * @formats: (array zero-terminated=1): The format array to search + * @format: the format to find + * + * See if the given format is inside the format array. + * + * Returns: %TRUE if the format is found inside the array + */ +gboolean +gst_formats_contains (const GstFormat * formats, GstFormat format) +{ + if (!formats) + return FALSE; + + while (*formats) { + if (*formats == format) + return TRUE; - return GST_FORMAT_UNDEFINED; + formats++; + } + return FALSE; } + /** * gst_format_get_details: * @format: The format to get details of - * @nick: The nick of the format - * @description: The description of the format * * Get details about the given format. * - * Returns: TRUE if the format was registered, FALSE otherwise + * Returns: (nullable): The #GstFormatDefinition for @format or %NULL + * on failure. + * + * MT safe. */ -gboolean -gst_format_get_details (GstFormat format, const gchar **nick, const gchar **description) +const GstFormatDefinition * +gst_format_get_details (GstFormat format) { - GList *walk; - GstFormatDefinition *walk_format; + const GstFormatDefinition *result; - g_return_val_if_fail (nick != NULL, FALSE); - g_return_val_if_fail (description != NULL, FALSE); + g_mutex_lock (&mutex); + result = g_hash_table_lookup (_format_to_nick, GINT_TO_POINTER (format)); + g_mutex_unlock (&mutex); - walk = _gst_formats; + return result; +} - while (walk) { - walk_format = (GstFormatDefinition *) walk->data; - - if (walk_format->value == format) { - *nick = walk_format->nick; - *description = walk_format->description; +/** + * gst_format_iterate_definitions: + * + * Iterate all the registered formats. The format definition is read + * only. + * + * Returns: (transfer full): a GstIterator of #GstFormatDefinition. + */ +GstIterator * +gst_format_iterate_definitions (void) +{ + GstIterator *result; - return TRUE; - } + g_mutex_lock (&mutex); + /* FIXME: register a boxed type for GstFormatDefinition */ + result = gst_iterator_new_list (G_TYPE_POINTER, + &mutex, &_n_values, &_gst_formats, NULL, NULL); + g_mutex_unlock (&mutex); - walk = g_list_next (walk); - } - return FALSE; + return result; }