| 1 | /* GStreamer |
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| 2 | * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
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| 3 | * 2000 Wim Taymans <wim.taymans@chello.be> |
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| 4 | * |
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| 5 | * gstquery.h: GstQuery API declaration |
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| 6 | * |
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| 7 | * This library is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Library General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * This library is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Library General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Library General Public |
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| 18 | * License along with this library; if not, write to the |
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| 19 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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| 20 | * Boston, MA 02111-1307, USA. |
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| 21 | */ |
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| 22 | |
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| 23 | |
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| 24 | #ifndef __GST_QUERY_H__ |
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| 25 | #define __GST_QUERY_H__ |
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| 26 | |
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| 27 | #include <glib.h> |
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| 28 | |
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| 29 | G_BEGIN_DECLS |
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| 30 | |
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| 31 | typedef enum { |
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| 32 | GST_QUERY_NONE = 0, |
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| 33 | GST_QUERY_TOTAL, |
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| 34 | GST_QUERY_POSITION, |
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| 35 | GST_QUERY_LATENCY, |
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| 36 | GST_QUERY_JITTER, |
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| 37 | GST_QUERY_START, |
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| 38 | GST_QUERY_SEGMENT_END, |
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| 39 | GST_QUERY_RATE |
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| 40 | } GstQueryType; |
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| 41 | |
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| 42 | /* rate is relative to 1000000 */ |
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| 43 | #define GST_QUERY_TYPE_RATE_DEN G_GINT64_CONSTANT (1000000) |
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| 44 | |
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| 45 | typedef struct _GstQueryTypeDefinition GstQueryTypeDefinition; |
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| 46 | |
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| 47 | struct _GstQueryTypeDefinition |
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| 48 | { |
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| 49 | GstQueryType value; |
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| 50 | gchar *nick; |
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| 51 | gchar *description; |
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| 52 | }; |
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| 53 | |
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| 54 | #ifdef G_HAVE_ISO_VARARGS |
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| 55 | #define GST_QUERY_TYPE_FUNCTION(type, functionname, ...) \ |
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| 56 | static const GstQueryType* \ |
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| 57 | functionname (type object) \ |
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| 58 | { \ |
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| 59 | static const GstQueryType types[] = { \ |
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| 60 | __VA_ARGS__, \ |
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| 61 | 0 \ |
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| 62 | }; \ |
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| 63 | return types; \ |
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| 64 | } |
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| 65 | #elif defined(G_HAVE_GNUC_VARARGS) |
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| 66 | #define GST_QUERY_TYPE_FUNCTION(type, functionname, a...) \ |
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| 67 | static const GstQueryType* \ |
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| 68 | functionname (type object) \ |
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| 69 | { \ |
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| 70 | static const GstQueryType types[] = { \ |
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| 71 | a, \ |
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| 72 | 0 \ |
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| 73 | }; \ |
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| 74 | return types; \ |
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| 75 | } |
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| 76 | #endif |
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| 77 | |
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| 78 | void _gst_query_type_initialize (void); |
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| 79 | |
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| 80 | /* register a new query */ |
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| 81 | GstQueryType gst_query_type_register (const gchar *nick, |
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| 82 | const gchar *description); |
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| 83 | GstQueryType gst_query_type_get_by_nick (const gchar *nick); |
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| 84 | |
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| 85 | /* check if a query is in an array of querys */ |
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| 86 | gboolean gst_query_types_contains (const GstQueryType *types, GstQueryType type); |
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| 87 | |
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| 88 | /* query for query details */ |
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| 89 | G_CONST_RETURN GstQueryTypeDefinition* |
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| 90 | gst_query_type_get_details (GstQueryType type); |
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| 91 | G_CONST_RETURN GList* gst_query_type_get_definitions (void); |
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| 92 | |
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| 93 | G_END_DECLS |
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| 94 | |
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| 95 | #endif /* __GST_QUERY_H__ */ |
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| 96 | |
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