/*************************************************************************/ /* resource_importer_wav.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2020 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 RESOURCEIMPORTWAV_H #define RESOURCEIMPORTWAV_H #include "core/io/resource_importer.h" class ResourceImporterWAV : public ResourceImporter { GDCLASS(ResourceImporterWAV, ResourceImporter); public: virtual String get_importer_name() const override; virtual String get_visible_name() const override; virtual void get_recognized_extensions(List<String> *p_extensions) const override; virtual String get_save_extension() const override; virtual String get_resource_type() const override; virtual int get_preset_count() const override; virtual String get_preset_name(int p_idx) const override; virtual void get_import_options(List<ImportOption> *r_options, int p_preset = 0) const override; virtual bool get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const override; static void _compress_ima_adpcm(const Vector<float> &p_data, Vector<uint8_t> &dst_data) { /*p_sample_data->data = (void*)malloc(len); xm_s8 *dataptr=(xm_s8*)p_sample_data->data;*/ static const int16_t _ima_adpcm_step_table[89] = { 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209, 230, 253, 279, 307, 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767 }; static const int8_t _ima_adpcm_index_table[16] = { -1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8 }; int datalen = p_data.size(); int datamax = datalen; if (datalen & 1) { datalen++; } dst_data.resize(datalen / 2 + 4); uint8_t *w = dst_data.ptrw(); int i, step_idx = 0, prev = 0; uint8_t *out = w; //int16_t xm_prev=0; const float *in = p_data.ptr(); /* initial value is zero */ *(out++) = 0; *(out++) = 0; /* Table index initial value */ *(out++) = 0; /* unused */ *(out++) = 0; for (i = 0; i < datalen; i++) { int step, diff, vpdiff, mask; uint8_t nibble; int16_t xm_sample; if (i >= datamax) { xm_sample = 0; } else { xm_sample = CLAMP(in[i] * 32767.0, -32768, 32767); /* if (xm_sample==32767 || xm_sample==-32768) printf("clippy!\n",xm_sample); */ } //xm_sample=xm_sample+xm_prev; //xm_prev=xm_sample; diff = (int)xm_sample - prev; nibble = 0; step = _ima_adpcm_step_table[step_idx]; vpdiff = step >> 3; if (diff < 0) { nibble = 8; diff = -diff; } mask = 4; while (mask) { if (diff >= step) { nibble |= mask; diff -= step; vpdiff += step; } step >>= 1; mask >>= 1; }; if (nibble & 8) { prev -= vpdiff; } else { prev += vpdiff; } if (prev > 32767) { //printf("%i,xms %i, prev %i,diff %i, vpdiff %i, clip up %i\n",i,xm_sample,prev,diff,vpdiff,prev); prev = 32767; } else if (prev < -32768) { //printf("%i,xms %i, prev %i,diff %i, vpdiff %i, clip down %i\n",i,xm_sample,prev,diff,vpdiff,prev); prev = -32768; } step_idx += _ima_adpcm_index_table[nibble]; if (step_idx < 0) { step_idx = 0; } else if (step_idx > 88) { step_idx = 88; } if (i & 1) { *out |= nibble << 4; out++; } else { *out = nibble; } /*dataptr[i]=prev>>8;*/ } } virtual Error import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = nullptr, Variant *r_metadata = nullptr) override; ResourceImporterWAV(); }; #endif // RESOURCEIMPORTWAV_H