1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*************************************************************************/
/* audio_stream.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef AUDIO_STREAM_H
#define AUDIO_STREAM_H
#include "resource.h"
#include "servers/audio_server.h"
class AudioStreamPlayback : public Reference {
GDCLASS( AudioStreamPlayback, Reference )
public:
virtual void start(float p_from_pos=0.0)=0;
virtual void stop()=0;
virtual bool is_playing() const=0;
virtual int get_loop_count() const=0; //times it looped
virtual float get_pos() const=0;
virtual void seek_pos(float p_time)=0;
virtual void mix(AudioFrame* p_bufer,float p_rate_scale,int p_frames)=0;
virtual float get_length() const=0; //if supported, otherwise return 0
};
class AudioStreamPlaybackResampled : public AudioStreamPlayback {
GDCLASS( AudioStreamPlaybackResampled, AudioStreamPlayback )
enum {
FP_BITS=16, //fixed point used for resampling
FP_LEN=(1<<FP_BITS),
FP_MASK=FP_LEN-1,
INTERNAL_BUFFER_LEN=256,
CUBIC_INTERP_HISTORY=4
};
AudioFrame internal_buffer[INTERNAL_BUFFER_LEN+CUBIC_INTERP_HISTORY];
uint64_t mix_offset;
protected:
void _begin_resample();
virtual void _mix_internal(AudioFrame* p_bufer,int p_frames)=0;
virtual float get_stream_sampling_rate()=0;
public:
virtual void mix(AudioFrame* p_bufer,float p_rate_scale,int p_frames);
AudioStreamPlaybackResampled() { mix_offset=0; }
};
class AudioStream : public Resource {
GDCLASS( AudioStream, Resource )
OBJ_SAVE_TYPE( AudioStream ) //children are all saved as AudioStream, so they can be exchanged
public:
virtual Ref<AudioStreamPlayback> instance_playback()=0;
virtual String get_stream_name() const=0;
};
#endif // AUDIO_STREAM_H
|