3 Ann Hell Ex Machina - Music Software
4 Copyright (C) 2003/2005 Angel Ortega <angel@triptico.com>
6 ss_input.c - Code to load softsynth sounds in different formats
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 2
11 of the License, or (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 http://www.triptico.com
45 static int fget16(FILE * f
)
46 /* Reads a 16 bit integer from a file in big endian byte ordering */
51 c
+= (fgetc(f
) * 256);
57 static int fget32(FILE * f
)
58 /* Reads a 32 bit integer from a file in big endian byte ordering */
63 c
+= (fgetc(f
) * 256);
64 c
+= (fgetc(f
) * 65536);
65 c
+= (fgetc(f
) * 16777216);
71 static float load_sample(FILE * f
, int bits
, int sign
)
72 /* loads one sample from a file */
76 /* Caution: no error condition is checked */
88 s
=(short int)fget16(f
);
95 static void load_pcm_wave(FILE * f
, int bits
, int sign
, struct ss_wave
* w
)
96 /* loads an interleaved stream from a file */
101 /* fills the channels */
102 for(m
=0;m
< w
->size
;m
++)
106 for(n
=0;n
< w
->n_channels
;n
++)
107 w
->wave
[n
][i
]=load_sample(f
, bits
, sign
);
113 * ss_load_wav_file - Loads a file in .WAV format.
114 * @file: name of the file
115 * @base_freq: base frequency
116 * @min_freq: minimum frequency
117 * @max_freq: maximum frequency
119 * Loads a file in .WAV format.
121 struct ss_wave
* ss_load_wav_file(char * file
, double base_freq
,
122 double min_freq
, double max_freq
)
127 short int b_per_sec
, n_channels
;
128 char riffid
[5], waveid
[5], fmtid
[5], dataid
[5];
133 if((f
=fopen(file
, "r")) == NULL
)
136 fread(riffid
, 1, 4, f
);
138 fread(&rlen
, 1, 4, f
);
139 fread(waveid
, 1, 4, f
);
142 if(strcmp(waveid
,"WAVE"))
148 fread(fmtid
, 1, 4, f
);
157 /* wicked compressed format? fail */
162 n_channels
=fget16(f
);
166 bits
=fget16(f
) / n_channels
;
169 fread(dummydata
, 1, (size_t)flen
- 14, f
);
170 fread(dataid
, 1, 4, f
);
173 size
=(double) fget32(f
);
174 if(bits
== 16) size
/= 2;
175 size
/= (double) n_channels
;
177 if((w
=ss_alloc_wave(size
, n_channels
, s_rate
)) != NULL
)
181 w
->base_freq
=base_freq
;
182 w
->min_freq
=min_freq
;
183 w
->max_freq
=max_freq
;
185 load_pcm_wave(f
, bits
, 1, w
);
195 * ss_load_pat_file - Loads an instrument in .PAT format.
197 * @filename: filename holding the instrument
199 * Loads data from a Gravis Ultrasound patch (.PAT) format and
200 * stores it as layers for an instrument.
202 * Returns -100 if the file could not be read, -101 or -102
203 * if the file is not recognized as a .PAT file, or 0 if
204 * everything went OK.
206 int ss_load_pat_file(struct ss_ins
* i
, char * file
)
212 int flags
, bits
, sign
, loop
, pingpong
;
215 if((f
=fopen(file
, "r")) == NULL
)
218 /* read signatures */
219 fread(buffer
, 12, 1, f
);
220 if(strcmp(buffer
, "GF1PATCH110") != 0)
226 fread(buffer
, 10, 1, f
);
227 if(strcmp(buffer
, "ID#000002") != 0)
233 /* skip description */
234 fread(buffer
, 65, 1, f
);
240 fread(buffer
, 109, 1, f
);
246 fread(buffer
, 40, 1, f
);
248 for(n
=0;n
< n_layers
;n
++)
251 double loop_start
, loop_end
;
252 double min_freq
, max_freq
, base_freq
;
255 fread(buffer
, 8, 1, f
);
256 printf("name: '%s'\n", buffer
);
258 size
=(double)fget32(f
);
259 loop_start
=(double)fget32(f
);
260 loop_end
=(double)fget32(f
);
263 printf("size: %d [%d-%d], s_rate: %d\n",
264 size
, (int)loop_start
, (int)loop_end
, s_rate
);
266 min_freq
=((double)fget32(f
)) / 1000.0;
267 max_freq
=((double)fget32(f
)) / 1000.0;
268 base_freq
=((double)fget32(f
)) / 1000.0;
270 printf("note_freqs: %lf - %lf - %lf\n",
271 min_freq
, base_freq
, max_freq
);
276 /* ignore fine-tune */
279 /* ignore pan position */
282 /* skip envelope rate, value, tremolo and vibrato */
283 fread(buffer
, 18, 1, f
);
286 printf("flags: 0x%02X\n", flags
);
288 bits
=flags
& 0x01 ? 16 : 8;
289 sign
=flags
& 0x02 ? 0 : 1;
290 loop
=flags
& 0x04 ? 1 : 0;
291 pingpong
=flags
& 0x08 ? 1 : 0;
293 printf("bits: %d, sign: %d, loop: %d pingpong: %d\n",
294 bits
, sign
, loop
, pingpong
);
303 /* skip frequency scale data */
304 fget16(f
); fget16(f
);
307 fread(buffer
, 36, 1, f
);
309 if((w
=ss_alloc_wave(size
, 1, s_rate
)) == NULL
)
312 /* set the rest of values */
313 w
->loop_start
=loop_start
;
314 w
->loop_end
=loop_end
;
315 w
->base_freq
=base_freq
;
316 w
->min_freq
=min_freq
;
317 w
->max_freq
=max_freq
;
320 load_pcm_wave(f
, bits
, sign
, w
);
327 /* if ping-pong, realloc space for a reverse
328 version of the loop */
329 loop_size
=(int)(loop_end
- loop_start
);
331 ptr
=(float *) malloc((size
+ loop_size
+ 1)
334 /* transfer start and loop */
335 for(m
=0;m
<= (int)loop_end
;m
++)
336 ptr
[m
]=w
->wave
[0][m
];
338 /* transfer a reversed version of the loop */
339 for(o
=m
- 1;o
>= loop_start
;o
--,m
++)
340 ptr
[m
]=w
->wave
[0][o
];
342 /* transfer the end */
343 for(o
=loop_end
+ 1;o
< size
;o
++,m
++)
344 ptr
[m
]=w
->wave
[0][o
];
346 w
->loop_end
+= (double) loop_size
;
347 w
->size
+= (double) loop_size
;
354 if(loop
== 0) w
->loop_start
=-1;
356 /* finally add layer to instrument */
357 ss_ins_add_layer(i
, w
);