1 /* GStreamer FAAD (Free AAC Decoder) plugin
2  * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef __GST_FAAD_H__
21 #define __GST_FAAD_H__
22 
23 #include <gst/gst.h>
24 #include <gst/audio/gstaudiodecoder.h>
25 
26 #include <neaacdec.h>
27 
28 G_BEGIN_DECLS
29 
30 #define GST_TYPE_FAAD \
31   (gst_faad_get_type ())
32 #define GST_FAAD(obj) \
33   (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FAAD, GstFaad))
34 #define GST_FAAD_CLASS(klass) \
35   (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FAAD, GstFaadClass))
36 #define GST_IS_FAAD(obj) \
37   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FAAD))
38 #define GST_IS_FAAD_CLASS(klass) \
39   (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FAAD))
40 
41 typedef struct _GstFaad {
42   GstAudioDecoder element;
43 
44   guint      samplerate; /* sample rate of the last MPEG frame    */
45   guint      channels;   /* number of channels of the last frame  */
46   guint      bps;        /* bytes per sample                      */
47   guchar    *channel_positions;
48   GstAudioChannelPosition aac_positions[6], gst_positions[6];
49   gboolean   need_reorder;
50   gint       reorder_map[64];
51 
52   guint8     fake_codec_data[2];
53   guint32    last_header;
54 
55   /* FAAD object */
56   faacDecHandle handle;
57   gboolean init;
58 
59   gboolean packetised; /* We must differentiate between raw and packetised streams */
60 
61 } GstFaad;
62 
63 typedef struct _GstFaadClass {
64   GstAudioDecoderClass parent_class;
65 } GstFaadClass;
66 
67 GType gst_faad_get_type (void);
68 
69 G_END_DECLS
70 
71 #endif /* __GST_FAAD_H__ */
72