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wavAudioCursor.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 wavAudioCursor.h
10 * @author rdb
11 * @date 2013-08-23
12 */
13
14#ifndef WAVAUDIOCURSOR_H
15#define WAVAUDIOCURSOR_H
16
17#include "pandabase.h"
18#include "movieAudioCursor.h"
19#include "streamReader.h"
20
21class WavAudio;
22
23/**
24 * Used for reading PCM .wav files. Supported formats are linear PCM, IEEE
25 * float, A-law and mu-law.
26 */
27class EXPCL_PANDA_MOVIES WavAudioCursor : public MovieAudioCursor {
28PUBLISHED:
29 explicit WavAudioCursor(WavAudio *src, std::istream *stream);
30 virtual ~WavAudioCursor();
31 virtual void seek(double offset);
32
33public:
34 virtual void read_samples(int n, int16_t *data);
35
36 bool _is_valid;
37
38protected:
39 // Format codes as used by wave files.
40 enum Format {
41 F_pcm = 0x0001,
42 F_float = 0x0003,
43 F_alaw = 0x0006,
44 F_mulaw = 0x0007,
45
46 F_extensible = 0xfffe,
47 };
48
49 std::istream *_stream;
50 StreamReader _reader;
51
52 Format _format;
53 double _byte_rate;
54 int _block_align;
55 int _bytes_per_sample;
56
57 std::streampos _data_start;
58 std::streampos _data_pos;
59 size_t _data_size;
60
61public:
62 static TypeHandle get_class_type() {
63 return _type_handle;
64 }
65 static void init_type() {
66 MovieAudioCursor::init_type();
67 register_type(_type_handle, "WavAudioCursor",
68 MovieAudioCursor::get_class_type());
69 }
70 virtual TypeHandle get_type() const {
71 return get_class_type();
72 }
73 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
74
75private:
76 static TypeHandle _type_handle;
77};
78
79#include "wavAudioCursor.I"
80
81#endif // WAVAUDIOCURSOR_H
A MovieAudio is actually any source that provides a sequence of audio samples.
virtual void seek(double offset)
Skips to the specified offset within the file.
void read_samples(int n, Datagram *dg)
Read audio samples from the stream into a Datagram.
A class to read sequential binary data directly from an istream.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
Used for reading PCM .wav files.
A native PCM .wav loader.
Definition wavAudio.h:26
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.