root/OpenSceneGraph/trunk/include/osg/AudioStream @ 9827

Revision 9827, 2.6 kB (checked in by robert, 5 years ago)

Introduced osg::AudioStream? class to help manage audio streams coming in from movie reading plugins

RevLine 
[9827]1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under 
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_AUDIOSTREAM
15#define OSG_AUDIOSTREAM 1
16
17#include <osg/Image>
18
19namespace osg {
20
21/** Pure virtual AudioSinkInterface bass class that is used to connect the audio system with AudioStreams. */
22class OSG_EXPORT AudioSinkInterface : public osg::Object
23{
24public:
25
26    AudioSinkInterface();
27
28    virtual void startPlaying() = 0;
29    virtual bool playing() const = 0;
30
31    virtual double getDelay() const { return _delay; }
32    virtual void setDelay(const double delay) { _delay = delay; }
33
34    virtual const char * libraryName() const { return "osgFFmpeg"; }
35    virtual const char * className() const { return "AudioSinkInterface"; }
36
37private:
38
39    virtual AudioSinkInterface * cloneType() const { return 0; }
40    virtual AudioSinkInterface * clone(const osg::CopyOp &) const { return 0; }
41
42    double  _delay;
43};
44
45/** Pure virtual AudioStream base class. Subclasses provide mechanism for reading/generating audio data*/
46class OSG_EXPORT AudioStream : public osg::Object
47{
48    public:
49        AudioStream();
50
51        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
52        AudioStream(const AudioStream& audio,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
53
54        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const AudioStream*>(obj)!=0; }
55        virtual const char* libraryName() const { return "osg"; }
56        virtual const char* className() const { return "AudioStream"; }
57
58        virtual void setAudioSink(osg::AudioSinkInterface* audio_sink) = 0;
59       
60        virtual void consumeAudioBuffer(void * const buffer, const size_t size) = 0;
61       
62        virtual bool audioStream() const = 0;
63        virtual int audioFrequency() const = 0;
64        virtual int audioNbChannels() const = 0;
65
66        enum SampleFormat
67        {
68            SAMPLE_FORMAT_U8,
69            SAMPLE_FORMAT_S16,
70            SAMPLE_FORMAT_S24,
71            SAMPLE_FORMAT_S32,
72            SAMPLE_FORMAT_F32
73        };
74
75        virtual SampleFormat audioSampleFormat() const = 0;
76};
77
78} // namespace
79
80#endif
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