timidity.c
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上传日期:2022-07-21
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文件大小:9k
- /*
- TiMidity -- Experimental MIDI to WAVE converter
- Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
- 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.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "SDL.h"
- #include "config.h"
- #include "common.h"
- #include "instrum.h"
- #include "playmidi.h"
- #include "readmidi.h"
- #include "output.h"
- #include "ctrlmode.h"
- #include "timidity.h"
- #include "tables.h"
- void (*s32tobuf)(void *dp, int32 *lp, int32 c);
- int free_instruments_afterwards=0;
- static char def_instr_name[256]="";
- int AUDIO_BUFFER_SIZE;
- resample_t *resample_buffer=NULL;
- int32 *common_buffer=NULL;
- int num_ochannels;
- #define MAXWORDS 10
- static int read_config_file(const char *name)
- {
- FILE *fp;
- char tmp[PATH_MAX], *w[MAXWORDS], *cp;
- ToneBank *bank=0;
- int i, j, k, line=0, words;
- static int rcf_count=0;
- if (rcf_count>50)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "Probable source loop in configuration files");
- return (-1);
- }
- if (!(fp=open_file(name, 1, OF_VERBOSE)))
- return -1;
- while (fgets(tmp, sizeof(tmp), fp))
- {
- line++;
- w[words=0]=strtok(tmp, " trn240");
- if (!w[0] || (*w[0]=='#')) continue;
- while (w[words] && (words < MAXWORDS))
- {
- w[++words]=strtok(0," trn240");
- if (w[words] && w[words][0]=='#') break;
- }
- if (!strcmp(w[0], "map")) continue;
- if (!strcmp(w[0], "dir"))
- {
- if (words < 2)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: No directory givenn", name, line);
- return -2;
- }
- for (i=1; i<words; i++)
- add_to_pathlist(w[i]);
- }
- else if (!strcmp(w[0], "source"))
- {
- if (words < 2)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: No file name givenn", name, line);
- return -2;
- }
- for (i=1; i<words; i++)
- {
- rcf_count++;
- read_config_file(w[i]);
- rcf_count--;
- }
- }
- else if (!strcmp(w[0], "default"))
- {
- if (words != 2)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: Must specify exactly one patch namen",
- name, line);
- return -2;
- }
- strncpy(def_instr_name, w[1], 255);
- def_instr_name[255]=' ';
- }
- else if (!strcmp(w[0], "drumset"))
- {
- if (words < 2)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: No drum set number givenn",
- name, line);
- return -2;
- }
- i=atoi(w[1]);
- if (i<0 || i>127)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: Drum set must be between 0 and 127n",
- name, line);
- return -2;
- }
- if (!drumset[i])
- {
- drumset[i]=safe_malloc(sizeof(ToneBank));
- memset(drumset[i], 0, sizeof(ToneBank));
- }
- bank=drumset[i];
- }
- else if (!strcmp(w[0], "bank"))
- {
- if (words < 2)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: No bank number givenn",
- name, line);
- return -2;
- }
- i=atoi(w[1]);
- if (i<0 || i>127)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: Tone bank must be between 0 and 127n",
- name, line);
- return -2;
- }
- if (!tonebank[i])
- {
- tonebank[i]=safe_malloc(sizeof(ToneBank));
- memset(tonebank[i], 0, sizeof(ToneBank));
- }
- bank=tonebank[i];
- }
- else {
- if ((words < 2) || (*w[0] < '0' || *w[0] > '9'))
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: syntax errorn", name, line);
- return -2;
- }
- i=atoi(w[0]);
- if (i<0 || i>127)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: Program must be between 0 and 127n",
- name, line);
- return -2;
- }
- if (!bank)
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: Must specify tone bank or drum set "
- "before assignmentn",
- name, line);
- return -2;
- }
- if (bank->tone[i].name)
- free(bank->tone[i].name);
- strcpy((bank->tone[i].name=safe_malloc(strlen(w[1])+1)),w[1]);
- bank->tone[i].note=bank->tone[i].amp=bank->tone[i].pan=
- bank->tone[i].strip_loop=bank->tone[i].strip_envelope=
- bank->tone[i].strip_tail=-1;
- for (j=2; j<words; j++)
- {
- if (!(cp=strchr(w[j], '=')))
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: line %d: bad patch option %sn",
- name, line, w[j]);
- return -2;
- }
- *cp++=0;
- if (!strcmp(w[j], "amp"))
- {
- k=atoi(cp);
- if ((k<0 || k>MAX_AMPLIFICATION) || (*cp < '0' || *cp > '9'))
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: amplification must be between "
- "0 and %dn", name, line, MAX_AMPLIFICATION);
- return -2;
- }
- bank->tone[i].amp=k;
- }
- else if (!strcmp(w[j], "note"))
- {
- k=atoi(cp);
- if ((k<0 || k>127) || (*cp < '0' || *cp > '9'))
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: note must be between 0 and 127n",
- name, line);
- return -2;
- }
- bank->tone[i].note=k;
- }
- else if (!strcmp(w[j], "pan"))
- {
- if (!strcmp(cp, "center"))
- k=64;
- else if (!strcmp(cp, "left"))
- k=0;
- else if (!strcmp(cp, "right"))
- k=127;
- else
- k=((atoi(cp)+100) * 100) / 157;
- if ((k<0 || k>127) ||
- (k==0 && *cp!='-' && (*cp < '0' || *cp > '9')))
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: panning must be left, right, "
- "center, or between -100 and 100n",
- name, line);
- return -2;
- }
- bank->tone[i].pan=k;
- }
- else if (!strcmp(w[j], "keep"))
- {
- if (!strcmp(cp, "env"))
- bank->tone[i].strip_envelope=0;
- else if (!strcmp(cp, "loop"))
- bank->tone[i].strip_loop=0;
- else
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: keep must be env or loopn", name, line);
- return -2;
- }
- }
- else if (!strcmp(w[j], "strip"))
- {
- if (!strcmp(cp, "env"))
- bank->tone[i].strip_envelope=1;
- else if (!strcmp(cp, "loop"))
- bank->tone[i].strip_loop=1;
- else if (!strcmp(cp, "tail"))
- bank->tone[i].strip_tail=1;
- else
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL,
- "%s: line %d: strip must be env, loop, or tailn",
- name, line);
- return -2;
- }
- }
- else
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "%s: line %d: bad patch option %sn",
- name, line, w[j]);
- return -2;
- }
- }
- }
- }
- if (ferror(fp))
- {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "Can't read from %sn", name);
- close_file(fp);
- return -2;
- }
- close_file(fp);
- return 0;
- }
- int Timidity_Init(int rate, int format, int channels, int samples)
- {
- const char *env = getenv("TIMIDITY_CFG");
- if (!env || read_config_file(env)<0) {
- if (read_config_file(CONFIG_FILE)<0) {
- if (read_config_file(CONFIG_FILE_ETC)<0) {
- return(-1);
- }
- }
- }
- if (channels < 1 || channels == 3 || channels == 5 || channels > 6) return(-1);
- num_ochannels = channels;
- /* Set play mode parameters */
- play_mode->rate = rate;
- play_mode->encoding = 0;
- if ( (format&0xFF) == 16 ) {
- play_mode->encoding |= PE_16BIT;
- }
- if ( (format&0x8000) ) {
- play_mode->encoding |= PE_SIGNED;
- }
- if ( channels == 1 ) {
- play_mode->encoding |= PE_MONO;
- }
- switch (format) {
- case AUDIO_S8:
- s32tobuf = s32tos8;
- break;
- case AUDIO_U8:
- s32tobuf = s32tou8;
- break;
- case AUDIO_S16LSB:
- s32tobuf = s32tos16l;
- break;
- case AUDIO_S16MSB:
- s32tobuf = s32tos16b;
- break;
- case AUDIO_U16LSB:
- s32tobuf = s32tou16l;
- break;
- case AUDIO_U16MSB:
- s32tobuf = s32tou16b;
- break;
- default:
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "Unsupported audio format");
- return(-1);
- }
- AUDIO_BUFFER_SIZE = samples;
- /* Allocate memory for mixing (WARNING: Memory leak!) */
- resample_buffer = safe_malloc(AUDIO_BUFFER_SIZE*sizeof(resample_t)+100);
- common_buffer = safe_malloc(AUDIO_BUFFER_SIZE*num_ochannels*sizeof(int32));
- init_tables();
- if (ctl->open(0, 0)) {
- ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "Couldn't open %sn", ctl->id_name);
- return(-1);
- }
- if (!control_ratio) {
- control_ratio = play_mode->rate / CONTROLS_PER_SECOND;
- if(control_ratio<1)
- control_ratio=1;
- else if (control_ratio > MAX_CONTROL_RATIO)
- control_ratio=MAX_CONTROL_RATIO;
- }
- if (*def_instr_name)
- set_default_instrument(def_instr_name);
- return(0);
- }
- char timidity_error[TIMIDITY_ERROR_SIZE] = "";
- const char *Timidity_Error(void)
- {
- return(timidity_error);
- }