Panda3D

vorbisAudioCursor.h
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1 /**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file vorbisAudioCursor.h
10 * @author rdb
11 * @date 2013-08-23
12 */
13
14 #ifndef VORBISAUDIOCURSOR_H
15 #define VORBISAUDIOCURSOR_H
16
17 #include "pandabase.h"
18 #include "movieAudioCursor.h"
19
20 #ifdef HAVE_VORBIS
21
22 #include <vorbis/codec.h>
23 #include <vorbis/vorbisfile.h>
24
25 class VorbisAudio;
26
27 /**
28 * Interfaces with the libvorbisfile library to implement decoding of Ogg
29 * Vorbis audio files.
30 */
31 class EXPCL_PANDA_MOVIES VorbisAudioCursor : public MovieAudioCursor {
32 PUBLISHED:
33 explicit VorbisAudioCursor(VorbisAudio *src, std::istream *stream);
34 virtual ~VorbisAudioCursor();
35 virtual void seek(double offset);
36
37 public:
38 virtual void read_samples(int n, int16_t *data);
39
40 bool _is_valid;
41
42 private:
43 // Callbacks passed to libvorbisfile that read via VFS.
44 static size_t cb_read_func(void *ptr, size_t size, size_t nmemb, void *datasource);
45 static int cb_seek_func(void *datasource, ogg_int64_t offset, int whence);
46 static int cb_close_func(void *datasource);
47 static long cb_tell_func(void *datasource);
48
49 protected:
50 #ifndef CPPPARSER
51 OggVorbis_File _ov;
52 #endif
53
54 int _bitstream;
55 double _byte_rate;
56 int _block_align;
57 int _bytes_per_sample;
58 bool _is_float;
59
60 std::streampos _data_start;
61 std::streampos _data_pos;
62 size_t _data_size;
63
64 public:
65 static TypeHandle get_class_type() {
66 return _type_handle;
67 }
68 static void init_type() {
69 MovieAudioCursor::init_type();
70 register_type(_type_handle, "VorbisAudioCursor",
71 MovieAudioCursor::get_class_type());
72 }
73 virtual TypeHandle get_type() const {
74 return get_class_type();
75 }
76 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
77
78 private:
79 static TypeHandle _type_handle;
80 };
81
82 #include "vorbisAudioCursor.I"
83
84 #endif // HAVE_VORBIS
85
86 #endif // VORBISAUDIOCURSOR_H
MovieAudioCursor
A MovieAudio is actually any source that provides a sequence of audio samples.
Definition: movieAudioCursor.h:34
MovieAudioCursor::seek
virtual void seek(double offset)
Skips to the specified offset within the file.
Definition: movieAudioCursor.cxx:133
MovieAudioCursor::read_samples
void read_samples(int n, Datagram *dg)
Read audio samples from the stream into a Datagram.
Definition: movieAudioCursor.cxx:73
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:81
movieAudioCursor.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pandabase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
register_type
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
Definition: register_type.I:22
vorbisAudioCursor.I
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.