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Diffstat (limited to 'scene/resources/audio_stream_wav.h')
| -rw-r--r-- | scene/resources/audio_stream_wav.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/scene/resources/audio_stream_wav.h b/scene/resources/audio_stream_wav.h new file mode 100644 index 0000000000..d800388d96 --- /dev/null +++ b/scene/resources/audio_stream_wav.h @@ -0,0 +1,159 @@ +/*************************************************************************/ +/* audio_stream_wav.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* 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_WAV_H +#define AUDIO_STREAM_WAV_H + +#include "servers/audio/audio_stream.h" + +class AudioStreamWAV; + +class AudioStreamPlaybackWAV : public AudioStreamPlayback { + GDCLASS(AudioStreamPlaybackWAV, AudioStreamPlayback); + enum { + MIX_FRAC_BITS = 13, + MIX_FRAC_LEN = (1 << MIX_FRAC_BITS), + MIX_FRAC_MASK = MIX_FRAC_LEN - 1, + }; + + struct IMA_ADPCM_State { + int16_t step_index = 0; + int32_t predictor = 0; + /* values at loop point */ + int16_t loop_step_index = 0; + int32_t loop_predictor = 0; + int32_t last_nibble = 0; + int32_t loop_pos = 0; + int32_t window_ofs = 0; + } ima_adpcm[2]; + + int64_t offset = 0; + int sign = 1; + bool active = false; + friend class AudioStreamWAV; + Ref<AudioStreamWAV> base; + + template <class Depth, bool is_stereo, bool is_ima_adpcm> + void do_resample(const Depth *p_src, AudioFrame *p_dst, int64_t &offset, int32_t &increment, uint32_t amount, IMA_ADPCM_State *ima_adpcm); + +public: + virtual void start(float p_from_pos = 0.0) override; + virtual void stop() override; + virtual bool is_playing() const override; + + virtual int get_loop_count() const override; //times it looped + + virtual float get_playback_position() const override; + virtual void seek(float p_time) override; + + virtual int mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames) override; + + virtual void tag_used_streams() override; + + AudioStreamPlaybackWAV(); +}; + +class AudioStreamWAV : public AudioStream { + GDCLASS(AudioStreamWAV, AudioStream); + RES_BASE_EXTENSION("sample") + +public: + enum Format { + FORMAT_8_BITS, + FORMAT_16_BITS, + FORMAT_IMA_ADPCM + }; + + // Keep the ResourceImporterWAV `edit/loop_mode` enum hint in sync with these options. + enum LoopMode { + LOOP_DISABLED, + LOOP_FORWARD, + LOOP_PINGPONG, + LOOP_BACKWARD + }; + +private: + friend class AudioStreamPlaybackWAV; + + enum { + DATA_PAD = 16 //padding for interpolation + }; + + Format format = FORMAT_8_BITS; + LoopMode loop_mode = LOOP_DISABLED; + bool stereo = false; + int loop_begin = 0; + int loop_end = 0; + int mix_rate = 44100; + void *data = nullptr; + uint32_t data_bytes = 0; + +protected: + static void _bind_methods(); + +public: + void set_format(Format p_format); + Format get_format() const; + + void set_loop_mode(LoopMode p_loop_mode); + LoopMode get_loop_mode() const; + + void set_loop_begin(int p_frame); + int get_loop_begin() const; + + void set_loop_end(int p_frame); + int get_loop_end() const; + + void set_mix_rate(int p_hz); + int get_mix_rate() const; + + void set_stereo(bool p_enable); + bool is_stereo() const; + + virtual float get_length() const override; //if supported, otherwise return 0 + + virtual bool is_monophonic() const override; + + void set_data(const Vector<uint8_t> &p_data); + Vector<uint8_t> get_data() const; + + Error save_to_wav(const String &p_path); + + virtual Ref<AudioStreamPlayback> instantiate_playback() override; + virtual String get_stream_name() const override; + + AudioStreamWAV(); + ~AudioStreamWAV(); +}; + +VARIANT_ENUM_CAST(AudioStreamWAV::Format) +VARIANT_ENUM_CAST(AudioStreamWAV::LoopMode) + +#endif // AUDIO_STREAM_WAV_H |