1/* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Library <2001> Thomas Vander Stichele <thomas@apestaart.org>
4 * <2011> Wim Taymans <wim.taymans@gmail.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#ifndef __GST_AUDIO_AUDIO_H__
23#include <gst/audio/audio.h>
24#endif
25
26#ifndef __GST_AUDIO_INFO_H__
27#define __GST_AUDIO_INFO_H__
28
29G_BEGIN_DECLS
30
31typedef struct _GstAudioInfo GstAudioInfo;
32
33/**
34 * GstAudioFlags:
35 * @GST_AUDIO_FLAG_NONE: no valid flag
36 * @GST_AUDIO_FLAG_UNPOSITIONED: the position array explicitly
37 * contains unpositioned channels.
38 *
39 * Extra audio flags
40 */
41typedef enum {
42 GST_AUDIO_FLAG_NONE = 0,
43 GST_AUDIO_FLAG_UNPOSITIONED = (1 << 0)
44} GstAudioFlags;
45
46/**
47 * GstAudioInfo:
48 * @finfo: the format info of the audio
49 * @flags: additional audio flags
50 * @layout: audio layout
51 * @rate: the audio sample rate
52 * @channels: the number of channels
53 * @bpf: the number of bytes for one frame, this is the size of one
54 * sample * @channels
55 * @position: the positions for each channel
56 *
57 * Information describing audio properties. This information can be filled
58 * in from GstCaps with gst_audio_info_from_caps().
59 *
60 * Use the provided macros to access the info in this structure.
61 */
62struct _GstAudioInfo {
63 const GstAudioFormatInfo *finfo;
64 GstAudioFlags flags;
65 GstAudioLayout layout;
66 gint rate;
67 gint channels;
68 gint bpf;
69 GstAudioChannelPosition position[64];
70
71 /*< private >*/
72 gpointer _gst_reserved[GST_PADDING];
73};
74
75#define GST_TYPE_AUDIO_INFO (gst_audio_info_get_type ())
76GST_AUDIO_API
77GType gst_audio_info_get_type (void);
78
79#define GST_AUDIO_INFO_IS_VALID(i) ((i)->finfo != NULL && (i)->rate > 0 && (i)->channels > 0 && (i)->bpf > 0)
80
81#define GST_AUDIO_INFO_FORMAT(i) (GST_AUDIO_FORMAT_INFO_FORMAT((i)->finfo))
82#define GST_AUDIO_INFO_NAME(i) (GST_AUDIO_FORMAT_INFO_NAME((i)->finfo))
83#define GST_AUDIO_INFO_WIDTH(i) (GST_AUDIO_FORMAT_INFO_WIDTH((i)->finfo))
84#define GST_AUDIO_INFO_DEPTH(i) (GST_AUDIO_FORMAT_INFO_DEPTH((i)->finfo))
85#define GST_AUDIO_INFO_BPS(info) (GST_AUDIO_INFO_DEPTH(info) >> 3)
86
87#define GST_AUDIO_INFO_IS_INTEGER(i) (GST_AUDIO_FORMAT_INFO_IS_INTEGER((i)->finfo))
88#define GST_AUDIO_INFO_IS_FLOAT(i) (GST_AUDIO_FORMAT_INFO_IS_FLOAT((i)->finfo))
89#define GST_AUDIO_INFO_IS_SIGNED(i) (GST_AUDIO_FORMAT_INFO_IS_SIGNED((i)->finfo))
90
91#define GST_AUDIO_INFO_ENDIANNESS(i) (GST_AUDIO_FORMAT_INFO_ENDIANNESS((i)->finfo))
92#define GST_AUDIO_INFO_IS_LITTLE_ENDIAN(i) (GST_AUDIO_FORMAT_INFO_IS_LITTLE_ENDIAN((i)->finfo))
93#define GST_AUDIO_INFO_IS_BIG_ENDIAN(i) (GST_AUDIO_FORMAT_INFO_IS_BIG_ENDIAN((i)->finfo))
94
95#define GST_AUDIO_INFO_FLAGS(info) ((info)->flags)
96#define GST_AUDIO_INFO_IS_UNPOSITIONED(info) (((info)->flags & GST_AUDIO_FLAG_UNPOSITIONED) != 0)
97#define GST_AUDIO_INFO_LAYOUT(info) ((info)->layout)
98
99#define GST_AUDIO_INFO_RATE(info) ((info)->rate)
100#define GST_AUDIO_INFO_CHANNELS(info) ((info)->channels)
101#define GST_AUDIO_INFO_BPF(info) ((info)->bpf)
102#define GST_AUDIO_INFO_POSITION(info,c) ((info)->position[c])
103
104GST_AUDIO_API
105GstAudioInfo * gst_audio_info_new (void);
106
107GST_AUDIO_API
108GstAudioInfo * gst_audio_info_new_from_caps (const GstCaps * caps);
109
110GST_AUDIO_API
111void gst_audio_info_init (GstAudioInfo *info);
112
113GST_AUDIO_API
114GstAudioInfo * gst_audio_info_copy (const GstAudioInfo *info);
115
116GST_AUDIO_API
117void gst_audio_info_free (GstAudioInfo *info);
118
119GST_AUDIO_API
120void gst_audio_info_set_format (GstAudioInfo *info, GstAudioFormat format,
121 gint rate, gint channels,
122 const GstAudioChannelPosition *position);
123
124GST_AUDIO_API
125gboolean gst_audio_info_from_caps (GstAudioInfo *info, const GstCaps *caps);
126
127GST_AUDIO_API
128GstCaps * gst_audio_info_to_caps (const GstAudioInfo *info);
129
130GST_AUDIO_API
131gboolean gst_audio_info_convert (const GstAudioInfo * info,
132 GstFormat src_fmt, gint64 src_val,
133 GstFormat dest_fmt, gint64 * dest_val);
134
135GST_AUDIO_API
136gboolean gst_audio_info_is_equal (const GstAudioInfo *info,
137 const GstAudioInfo *other);
138
139G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAudioInfo, gst_audio_info_free)
140
141G_END_DECLS
142
143#endif /* __GST_AUDIO_INFO_H__ */
144

source code of include/gstreamer-1.0/gst/audio/audio-info.h