mirror of
https://github.com/ZDoom/raze-gles.git
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268 lines
6.8 KiB
C
268 lines
6.8 KiB
C
/* Extended Module Player
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* Copyright (C) 1996-2018 Claudio Matsuoka and Hipolito Carraro Jr
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdio.h>
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#include <string.h>
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#include "common.h"
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#include "period.h"
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#include <math.h>
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#ifdef LIBXMP_PAULA_SIMULATOR
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/*
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* Period table from the Protracker V2.1A play routine
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*/
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static uint16 pt_period_table[16][36] = {
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/* Tuning 0, Normal */
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{
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856,808,762,720,678,640,604,570,538,508,480,453,
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428,404,381,360,339,320,302,285,269,254,240,226,
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214,202,190,180,170,160,151,143,135,127,120,113
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},
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/* Tuning 1 */
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{
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850,802,757,715,674,637,601,567,535,505,477,450,
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425,401,379,357,337,318,300,284,268,253,239,225,
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213,201,189,179,169,159,150,142,134,126,119,113
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},
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/* Tuning 2 */
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{
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844,796,752,709,670,632,597,563,532,502,474,447,
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422,398,376,355,335,316,298,282,266,251,237,224,
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211,199,188,177,167,158,149,141,133,125,118,112
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},
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/* Tuning 3 */
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{
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838,791,746,704,665,628,592,559,528,498,470,444,
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419,395,373,352,332,314,296,280,264,249,235,222,
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209,198,187,176,166,157,148,140,132,125,118,111
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},
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/* Tuning 4 */
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{
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832,785,741,699,660,623,588,555,524,495,467,441,
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416,392,370,350,330,312,294,278,262,247,233,220,
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208,196,185,175,165,156,147,139,131,124,117,110
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},
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/* Tuning 5 */
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{
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826,779,736,694,655,619,584,551,520,491,463,437,
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413,390,368,347,328,309,292,276,260,245,232,219,
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206,195,184,174,164,155,146,138,130,123,116,109
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},
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/* Tuning 6 */
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{
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820,774,730,689,651,614,580,547,516,487,460,434,
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410,387,365,345,325,307,290,274,258,244,230,217,
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205,193,183,172,163,154,145,137,129,122,115,109
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},
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/* Tuning 7 */
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{
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814,768,725,684,646,610,575,543,513,484,457,431,
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407,384,363,342,323,305,288,272,256,242,228,216,
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204,192,181,171,161,152,144,136,128,121,114,108
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},
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/* Tuning -8 */
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{
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907,856,808,762,720,678,640,604,570,538,508,480,
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453,428,404,381,360,339,320,302,285,269,254,240,
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226,214,202,190,180,170,160,151,143,135,127,120
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},
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/* Tuning -7 */
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{
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900,850,802,757,715,675,636,601,567,535,505,477,
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450,425,401,379,357,337,318,300,284,268,253,238,
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225,212,200,189,179,169,159,150,142,134,126,119
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},
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/* Tuning -6 */
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{
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894,844,796,752,709,670,632,597,563,532,502,474,
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447,422,398,376,355,335,316,298,282,266,251,237,
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223,211,199,188,177,167,158,149,141,133,125,118
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},
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/* Tuning -5 */
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{
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887,838,791,746,704,665,628,592,559,528,498,470,
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444,419,395,373,352,332,314,296,280,264,249,235,
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222,209,198,187,176,166,157,148,140,132,125,118
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},
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/* Tuning -4 */
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{
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881,832,785,741,699,660,623,588,555,524,494,467,
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441,416,392,370,350,330,312,294,278,262,247,233,
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220,208,196,185,175,165,156,147,139,131,123,117
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},
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/* Tuning -3 */
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{
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875,826,779,736,694,655,619,584,551,520,491,463,
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437,413,390,368,347,328,309,292,276,260,245,232,
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219,206,195,184,174,164,155,146,138,130,123,116
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},
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/* Tuning -2 */
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{
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868,820,774,730,689,651,614,580,547,516,487,460,
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434,410,387,365,345,325,307,290,274,258,244,230,
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217,205,193,183,172,163,154,145,137,129,122,115
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},
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/* Tuning -1 */
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{
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862,814,768,725,684,646,610,575,543,513,484,457,
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431,407,384,363,342,323,305,288,272,256,242,228,
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216,203,192,181,171,161,152,144,136,128,121,114
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}
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};
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#endif
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#ifndef M_LN2
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#define M_LN2 0.69314718055994530942
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#endif
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#if !defined(HAVE_ROUND) || defined(_MSC_VER) || defined(__WATCOMC__)
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static inline double libxmp_round(double val)
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{
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return (val >= 0.0)? floor(val + 0.5) : ceil(val - 0.5);
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}
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#else
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#define libxmp_round round
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#endif
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#ifdef LIBXMP_PAULA_SIMULATOR
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/* Get period from note using Protracker tuning */
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static inline int libxmp_note_to_period_pt(int n, int f)
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{
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if (n < MIN_NOTE_MOD || n > MAX_NOTE_MOD) {
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return -1;
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}
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n -= 48;
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f >>= 4;
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if (f < -8 || f > 7) {
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return 0;
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}
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if (f < 0) {
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f += 16;
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}
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return (int)pt_period_table[f][n];
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}
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#endif
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/* Get period from note */
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double libxmp_note_to_period(struct context_data *ctx, int n, int f, double adj)
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{
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double d, per;
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struct module_data *m = &ctx->m;
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#ifdef LIBXMP_PAULA_SIMULATOR
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struct player_data *p = &ctx->p;
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/* If mod replayer, modrng and Amiga mixing are active */
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if (p->flags & XMP_FLAGS_A500) {
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if (IS_AMIGA_MOD()) {
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return libxmp_note_to_period_pt(n, f);
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}
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}
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#endif
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d = (double)n + (double)f / 128;
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switch (m->period_type) {
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case PERIOD_LINEAR:
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per = (240.0 - d) * 16; /* Linear */
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break;
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case PERIOD_CSPD:
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per = 8363.0 * pow(2, n / 12) / 32 + f; /* Hz */
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break;
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default:
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per = PERIOD_BASE / pow(2, d / 12); /* Amiga */
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}
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#ifndef LIBXMP_CORE_PLAYER
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if (adj > 0.1) {
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per *= adj;
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}
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#endif
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return per;
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}
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/* For the software mixer */
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double libxmp_note_to_period_mix(int n, int b)
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{
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double d = (double)n + (double)b / 12800;
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return PERIOD_BASE / pow(2, d / 12);
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}
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/* Get note from period */
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/* This function is used only by the MOD loader */
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int libxmp_period_to_note(int p)
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{
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if (p <= 0) {
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return 0;
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}
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return libxmp_round(12.0 * log(PERIOD_BASE / p) / M_LN2) + 1;
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}
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/* Get pitchbend from base note and amiga period */
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int libxmp_period_to_bend(struct context_data *ctx, double p, int n, double adj)
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{
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struct module_data *m = &ctx->m;
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double d;
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if (n == 0) {
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return 0;
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}
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switch (m->period_type) {
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case PERIOD_LINEAR:
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return (int) (100 * (8 * (((240 - n) << 4) - p)));
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case PERIOD_CSPD:
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d = libxmp_note_to_period(ctx, n, 0, adj);
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return libxmp_round(100.0 * (1536.0 / M_LN2) * log(p / d));
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default:
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/* Amiga */
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d = libxmp_note_to_period(ctx, n, 0, adj);
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return libxmp_round(100.0 * (1536.0 / M_LN2) * log(d / p));
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}
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}
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/* Convert finetune = 1200 * log2(C2SPD/8363))
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*
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* c = (1200.0 * log(c2spd) - 1200.0 * log(c4_rate)) / M_LN2;
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* xpo = c/100;
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* fin = 128 * (c%100) / 100;
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*/
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void libxmp_c2spd_to_note(int c2spd, int *n, int *f)
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{
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int c;
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if (c2spd == 0) {
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*n = *f = 0;
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return;
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}
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c = (int)(1536.0 * log((double)c2spd / 8363) / M_LN2);
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*n = c / 128;
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*f = c % 128;
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}
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