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
/**************************************************************************/
/*  audio_effect_record.h                                                 */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 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_EFFECT_RECORD_H
#define AUDIO_EFFECT_RECORD_H

#include "core/os/thread.h"
#include "scene/resources/audio_stream_wav.h"
#include "servers/audio/audio_effect.h"
#include "servers/audio_server.h"

class AudioEffectRecord;

class AudioEffectRecordInstance : public AudioEffectInstance {
	GDCLASS(AudioEffectRecordInstance, AudioEffectInstance);
	friend class AudioEffectRecord;

	bool is_recording;
	Thread io_thread;

	Vector<AudioFrame> ring_buffer;
	Vector<float> recording_data;

	unsigned int ring_buffer_pos;
	unsigned int ring_buffer_mask;
	unsigned int ring_buffer_read_pos;

	void _io_thread_process();
	void _io_store_buffer();
	static void _thread_callback(void *_instance);
	void _init_recording();
	void _update_buffer();
	static void _update(void *userdata);

public:
	void init();
	void finish();
	virtual void process(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) override;
	virtual bool process_silence() const override;
};

class AudioEffectRecord : public AudioEffect {
	GDCLASS(AudioEffectRecord, AudioEffect);

	friend class AudioEffectRecordInstance;

	enum {
		IO_BUFFER_SIZE_MS = 1500
	};

	Ref<AudioEffectRecordInstance> current_instance;

	AudioStreamWAV::Format format;

	void ensure_thread_stopped();

protected:
	static void _bind_methods();

public:
	Ref<AudioEffectInstance> instantiate() override;
	void set_recording_active(bool p_record);
	bool is_recording_active() const;
	void set_format(AudioStreamWAV::Format p_format);
	AudioStreamWAV::Format get_format() const;
	Ref<AudioStreamWAV> get_recording() const;
	AudioEffectRecord();
	~AudioEffectRecord();
};

#endif // AUDIO_EFFECT_RECORD_H