157 lines
5 KiB
C++
157 lines
5 KiB
C++
/*************************************************************************/
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/* audio_stream_sample.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef AUDIO_STREAM_SAMPLE_H
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#define AUDIO_STREAM_SAMPLE_H
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#include "servers/audio/audio_stream.h"
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class AudioStreamSample;
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class AudioStreamPlaybackSample : public AudioStreamPlayback {
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GDCLASS(AudioStreamPlaybackSample, AudioStreamPlayback);
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enum {
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MIX_FRAC_BITS = 13,
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MIX_FRAC_LEN = (1 << MIX_FRAC_BITS),
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MIX_FRAC_MASK = MIX_FRAC_LEN - 1,
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};
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struct IMA_ADPCM_State {
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int16_t step_index = 0;
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int32_t predictor = 0;
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/* values at loop point */
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int16_t loop_step_index = 0;
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int32_t loop_predictor = 0;
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int32_t last_nibble = 0;
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int32_t loop_pos = 0;
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int32_t window_ofs = 0;
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} ima_adpcm[2];
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int64_t offset = 0;
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int sign = 1;
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bool active = false;
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friend class AudioStreamSample;
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Ref<AudioStreamSample> base;
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template <class Depth, bool is_stereo, bool is_ima_adpcm>
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void do_resample(const Depth *p_src, AudioFrame *p_dst, int64_t &offset, int32_t &increment, uint32_t amount, IMA_ADPCM_State *ima_adpcm);
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public:
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virtual void start(float p_from_pos = 0.0) override;
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virtual void stop() override;
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virtual bool is_playing() const override;
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virtual int get_loop_count() const override; //times it looped
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virtual float get_playback_position() const override;
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virtual void seek(float p_time) override;
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virtual int mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames) override;
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AudioStreamPlaybackSample();
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};
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class AudioStreamSample : public AudioStream {
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GDCLASS(AudioStreamSample, AudioStream);
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RES_BASE_EXTENSION("sample")
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public:
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enum Format {
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FORMAT_8_BITS,
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FORMAT_16_BITS,
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FORMAT_IMA_ADPCM
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};
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enum LoopMode {
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LOOP_DISABLED,
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LOOP_FORWARD,
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LOOP_PINGPONG,
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LOOP_BACKWARD
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};
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private:
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friend class AudioStreamPlaybackSample;
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enum {
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DATA_PAD = 16 //padding for interpolation
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};
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Format format = FORMAT_8_BITS;
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LoopMode loop_mode = LOOP_DISABLED;
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bool stereo = false;
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int loop_begin = 0;
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int loop_end = 0;
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int mix_rate = 44100;
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void *data = nullptr;
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uint32_t data_bytes = 0;
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protected:
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static void _bind_methods();
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public:
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void set_format(Format p_format);
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Format get_format() const;
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void set_loop_mode(LoopMode p_loop_mode);
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LoopMode get_loop_mode() const;
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void set_loop_begin(int p_frame);
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int get_loop_begin() const;
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void set_loop_end(int p_frame);
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int get_loop_end() const;
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void set_mix_rate(int p_hz);
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int get_mix_rate() const;
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void set_stereo(bool p_enable);
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bool is_stereo() const;
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virtual float get_length() const override; //if supported, otherwise return 0
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virtual bool is_monophonic() const override;
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void set_data(const Vector<uint8_t> &p_data);
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Vector<uint8_t> get_data() const;
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Error save_to_wav(const String &p_path);
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virtual Ref<AudioStreamPlayback> instance_playback() override;
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virtual String get_stream_name() const override;
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AudioStreamSample();
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~AudioStreamSample();
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};
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VARIANT_ENUM_CAST(AudioStreamSample::Format)
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VARIANT_ENUM_CAST(AudioStreamSample::LoopMode)
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#endif // AUDIO_STREAM_SAMPLE_H
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