1 /* GStreamer MPEG audio parser
2  * Copyright (C) 2006-2007 Jan Schmidt <thaytan@mad.scientist.com>
3  * Copyright (C) 2010 Mark Nauwelaerts <mnauw users sf net>
4  * Copyright (C) 2010 Nokia Corporation. All rights reserved.
5  *   Contact: Stefan Kost <stefan.kost@nokia.com>
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Library General Public
9  * License as published by the Free Software Foundation; either
10  * version 2 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Library General Public License for more details.
16  *
17  * You should have received a copy of the GNU Library General Public
18  * License along with this library; if not, write to the
19  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
20  * Boston, MA 02110-1301, USA.
21  */
22 
23 #ifndef __GST_MPEG_AUDIO_PARSE_H__
24 #define __GST_MPEG_AUDIO_PARSE_H__
25 
26 #include <gst/gst.h>
27 #include <gst/base/gstbaseparse.h>
28 
29 G_BEGIN_DECLS
30 
31 #define GST_TYPE_MPEG_AUDIO_PARSE \
32   (gst_mpeg_audio_parse_get_type())
33 #define GST_MPEG_AUDIO_PARSE(obj) \
34   (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_MPEG_AUDIO_PARSE, GstMpegAudioParse))
35 #define GST_MPEG_AUDIO_PARSE_CLASS(klass) \
36   (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_MPEG_AUDIO_PARSE, GstMpegAudioParseClass))
37 #define GST_IS_MPEG_AUDIO_PARSE(obj) \
38   (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_MPEG_AUDIO_PARSE))
39 #define GST_IS_MPEG_AUDIO_PARSE_CLASS(klass) \
40   (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_MPEG_AUDIO_PARSE))
41 
42 typedef struct _GstMpegAudioParse GstMpegAudioParse;
43 typedef struct _GstMpegAudioParseClass GstMpegAudioParseClass;
44 
45 /**
46  * GstMpegAudioParse:
47  *
48  * The opaque GstMpegAudioParse object
49  */
50 struct _GstMpegAudioParse {
51   GstBaseParse baseparse;
52 
53   /*< private >*/
54   gint         rate;
55   gint         channels;
56   gint         layer;
57   gint         version;
58 
59   GstClockTime max_bitreservoir;
60   /* samples per frame */
61   gint        spf;
62 
63   gint         freerate;
64 
65   gboolean     sent_codec_tag;
66   guint        last_posted_bitrate;
67   gint         last_posted_crc, last_crc;
68   guint        last_posted_channel_mode, last_mode;
69 
70   /* Bitrate from non-vbr headers */
71   guint32      hdr_bitrate;
72 
73   /* Xing info */
74   guint32      xing_flags;
75   guint32      xing_frames;
76   GstClockTime xing_total_time;
77   guint32      xing_bytes;
78   /* percent -> filepos mapping */
79   guchar       xing_seek_table[100];
80   /* filepos -> percent mapping */
81   guint16      xing_seek_table_inverse[256];
82   guint32      xing_vbr_scale;
83   guint        xing_bitrate;
84 
85   /* VBRI info */
86   guint32      vbri_frames;
87   GstClockTime vbri_total_time;
88   guint32      vbri_bytes;
89   guint        vbri_bitrate;
90   guint        vbri_seek_points;
91   guint32     *vbri_seek_table;
92   gboolean     vbri_valid;
93 
94   /* LAME info */
95   guint32      encoder_delay;
96   guint32      encoder_padding;
97 };
98 
99 /**
100  * GstMpegAudioParseClass:
101  * @parent_class: Element parent class.
102  *
103  * The opaque GstMpegAudioParseClass data structure.
104  */
105 struct _GstMpegAudioParseClass {
106   GstBaseParseClass baseparse_class;
107 };
108 
109 GType gst_mpeg_audio_parse_get_type (void);
110 
111 G_END_DECLS
112 
113 #endif /* __GST_MPEG_AUDIO_PARSE_H__ */
114