ref: cd260be97f2374545f840a05b44ee8d67ce42151
dir: /src/gusconf.c/
// // Copyright(C) 2005-2014 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // DESCRIPTION: // GUS emulation code. // // Actually emulating a GUS is far too much work; fortunately // GUS "emulation" already exists in the form of Timidity, which // supports GUS patch files. This code therefore converts Doom's // DMXGUS lump into an equivalent Timidity configuration file. // #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #include "m_misc.h" #include "w_wad.h" #include "z_zone.h" #define MAX_INSTRUMENTS 256 typedef struct { char *patch_names[MAX_INSTRUMENTS]; int used[MAX_INSTRUMENTS]; int mapping[MAX_INSTRUMENTS]; unsigned int count; } gus_config_t; char *gus_patch_path = ""; int gus_ram_kb = 1024; static unsigned int MappingIndex(void) { unsigned int result = gus_ram_kb / 256; if (result < 1) { return 1; } else if (result > 4) { return 4; } else { return result; } } static int SplitLine(char *line, char **fields, unsigned int max_fields) { unsigned int num_fields; char *p; fields[0] = line; num_fields = 1; for (p = line; *p != '\0'; ++p) { if (*p == ',') { *p = '\0'; // Skip spaces following the comma. do { ++p; } while (*p != '\0' && isspace(*p)); fields[num_fields] = p; ++num_fields; --p; if (num_fields >= max_fields) { break; } } else if (*p == '#') { *p = '\0'; break; } } // Strip off trailing whitespace from the end of the line. p = fields[num_fields - 1] + strlen(fields[num_fields - 1]); while (p > fields[num_fields - 1] && isspace(*(p - 1))) { --p; *p = '\0'; } return num_fields; } static void ParseLine(gus_config_t *config, char *line) { char *fields[6]; unsigned int i; unsigned int num_fields; unsigned int instr_id, mapped_id; num_fields = SplitLine(line, fields, 6); if (num_fields < 6) { return; } instr_id = atoi(fields[0]); // Skip non GM percussions. if ((instr_id >= 128 && instr_id < 128 + 35) || instr_id > 128 + 81) { return; } mapped_id = atoi(fields[MappingIndex()]); for (i = 0; i < config->count; i++) { if (config->used[i] == mapped_id) { break; } } if (i == config->count) { // DMX uses wrong patch name (we should use name of 'mapped_id' // instrument, but DMX uses name of 'instr_id' instead). free(config->patch_names[i]); config->patch_names[i] = M_StringDuplicate(fields[5]); config->used[i] = mapped_id; config->count++; } config->mapping[instr_id] = i; } static void ParseDMXConfig(char *dmxconf, gus_config_t *config) { char *p, *newline; unsigned int i; memset(config, 0, sizeof(gus_config_t)); for (i = 0; i < MAX_INSTRUMENTS; ++i) { config->mapping[i] = -1; config->used[i] = -1; } config->count = 0; p = dmxconf; for (;;) { newline = strchr(p, '\n'); if (newline != NULL) { *newline = '\0'; } ParseLine(config, p); if (newline == NULL) { break; } else { p = newline + 1; } } } static void FreeDMXConfig(gus_config_t *config) { unsigned int i; for (i = 0; i < MAX_INSTRUMENTS; ++i) { free(config->patch_names[i]); } } static char *ReadDMXConfig(void) { int lumpnum; unsigned int len; char *data; // TODO: This should be chosen based on gamemode == commercial: lumpnum = W_CheckNumForName("DMXGUS"); if (lumpnum < 0) { lumpnum = W_GetNumForName("DMXGUSC"); } len = W_LumpLength(lumpnum); data = Z_Malloc(len + 1, PU_STATIC, NULL); W_ReadLump(lumpnum, data); data[len] = '\0'; return data; } static boolean WriteTimidityConfig(char *path, gus_config_t *config) { FILE *fstream; unsigned int i; fstream = fopen(path, "w"); if (fstream == NULL) { return false; } fprintf(fstream, "# Autogenerated Timidity config.\n\n"); fprintf(fstream, "dir %s\n", gus_patch_path); fprintf(fstream, "\nbank 0\n\n"); for (i = 0; i < 128; ++i) { if (config->mapping[i] >= 0 && config->mapping[i] < MAX_INSTRUMENTS && config->patch_names[config->mapping[i]] != NULL) { fprintf(fstream, "%i %s\n", i, config->patch_names[config->mapping[i]]); } } fprintf(fstream, "\ndrumset 0\n\n"); for (i = 128 + 35; i <= 128 + 81; ++i) { if (config->mapping[i] >= 0 && config->mapping[i] < MAX_INSTRUMENTS && config->patch_names[config->mapping[i]] != NULL) { fprintf(fstream, "%i %s\n", i - 128, config->patch_names[config->mapping[i]]); } } fprintf(fstream, "\n"); fclose(fstream); return true; } boolean GUS_WriteConfig(char *path) { boolean result; char *dmxconf; gus_config_t config; if (!strcmp(gus_patch_path, "")) { printf("You haven't configured gus_patch_path.\n"); printf("gus_patch_path needs to point to the location of " "your GUS patch set.\n" "To get a copy of the \"standard\" GUS patches, " "download a copy of dgguspat.zip.\n"); return false; } dmxconf = ReadDMXConfig(); ParseDMXConfig(dmxconf, &config); result = WriteTimidityConfig(path, &config); FreeDMXConfig(&config); Z_Free(dmxconf); return result; }