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