1 /*************************************************************************/ 2 /* audio_stream_preview.h */ 3 /*************************************************************************/ 4 /* This file is part of: */ 5 /* GODOT ENGINE */ 6 /* https://godotengine.org */ 7 /*************************************************************************/ 8 /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ 9 /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */ 10 /* */ 11 /* Permission is hereby granted, free of charge, to any person obtaining */ 12 /* a copy of this software and associated documentation files (the */ 13 /* "Software"), to deal in the Software without restriction, including */ 14 /* without limitation the rights to use, copy, modify, merge, publish, */ 15 /* distribute, sublicense, and/or sell copies of the Software, and to */ 16 /* permit persons to whom the Software is furnished to do so, subject to */ 17 /* the following conditions: */ 18 /* */ 19 /* The above copyright notice and this permission notice shall be */ 20 /* included in all copies or substantial portions of the Software. */ 21 /* */ 22 /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ 23 /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ 24 /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ 25 /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ 26 /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ 27 /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ 28 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 29 /*************************************************************************/ 30 31 #ifndef AUDIO_STREAM_PREVIEW_H 32 #define AUDIO_STREAM_PREVIEW_H 33 34 #include "core/os/thread.h" 35 #include "scene/main/node.h" 36 #include "servers/audio/audio_stream.h" 37 38 class AudioStreamPreview : public Reference { 39 GDCLASS(AudioStreamPreview, Reference); 40 friend class AudioStream; 41 Vector<uint8_t> preview; 42 float length; 43 44 friend class AudioStreamPreviewGenerator; 45 46 public: 47 float get_length() const; 48 float get_max(float p_time, float p_time_next) const; 49 float get_min(float p_time, float p_time_next) const; 50 51 AudioStreamPreview(); 52 }; 53 54 class AudioStreamPreviewGenerator : public Node { 55 GDCLASS(AudioStreamPreviewGenerator, Node); 56 57 static AudioStreamPreviewGenerator *singleton; 58 59 struct Preview { 60 Ref<AudioStreamPreview> preview; 61 Ref<AudioStream> base_stream; 62 Ref<AudioStreamPlayback> playback; 63 volatile bool generating; 64 ObjectID id; 65 Thread *thread; 66 }; 67 68 Map<ObjectID, Preview> previews; 69 70 static void _preview_thread(void *p_preview); 71 72 void _update_emit(ObjectID p_id); 73 74 protected: 75 void _notification(int p_what); 76 static void _bind_methods(); 77 78 public: get_singleton()79 static AudioStreamPreviewGenerator *get_singleton() { return singleton; } 80 81 Ref<AudioStreamPreview> generate_preview(const Ref<AudioStream> &p_stream); 82 83 AudioStreamPreviewGenerator(); 84 }; 85 86 #endif // AUDIO_STREAM_PREVIEW_H 87