libsndfile source files.
[Faustine.git] / interpretor / libsndfile-1.0.25 / src / ircam.c
1 /*
2 ** Copyright (C) 2001-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
3 **
4 ** This program is free software; you can redistribute it and/or modify
5 ** it under the terms of the GNU Lesser General Public License as published by
6 ** the Free Software Foundation; either version 2.1 of the License, or
7 ** (at your option) any later version.
8 **
9 ** This program is distributed in the hope that it will be useful,
10 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ** GNU Lesser General Public License for more details.
13 **
14 ** You should have received a copy of the GNU Lesser General Public License
15 ** along with this program; if not, write to the Free Software
16 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #include "sfconfig.h"
20
21 #include <stdio.h>
22 #include <fcntl.h>
23 #include <string.h>
24 #include <ctype.h>
25
26 #include "sndfile.h"
27 #include "sfendian.h"
28 #include "common.h"
29
30 /*------------------------------------------------------------------------------
31 ** Macros to handle big/little endian issues.
32 */
33
34 /* The IRCAM magic number is weird in that one byte in the number can have
35 ** values of 0x1, 0x2, 0x03 or 0x04. Hence the need for a marker and a mask.
36 */
37
38 #define IRCAM_BE_MASK (MAKE_MARKER (0xFF, 0xFF, 0x00, 0xFF))
39 #define IRCAM_BE_MARKER (MAKE_MARKER (0x64, 0xA3, 0x00, 0x00))
40
41 #define IRCAM_LE_MASK (MAKE_MARKER (0xFF, 0x00, 0xFF, 0xFF))
42 #define IRCAM_LE_MARKER (MAKE_MARKER (0x00, 0x00, 0xA3, 0x64))
43
44 #define IRCAM_02B_MARKER (MAKE_MARKER (0x64, 0xA3, 0x02, 0x00))
45 #define IRCAM_03L_MARKER (MAKE_MARKER (0x64, 0xA3, 0x03, 0x00))
46
47 #define IRCAM_DATA_OFFSET (1024)
48
49 /*------------------------------------------------------------------------------
50 ** Typedefs.
51 */
52
53 enum
54 { IRCAM_PCM_16 = 0x00002,
55 IRCAM_FLOAT = 0x00004,
56 IRCAM_ALAW = 0x10001,
57 IRCAM_ULAW = 0x20001,
58 IRCAM_PCM_32 = 0x40004
59 } ;
60
61
62 /*------------------------------------------------------------------------------
63 ** Private static functions.
64 */
65
66 static int ircam_close (SF_PRIVATE *psf) ;
67 static int ircam_write_header (SF_PRIVATE *psf, int calc_length) ;
68 static int ircam_read_header (SF_PRIVATE *psf) ;
69
70 static int get_encoding (int subformat) ;
71
72 static const char* get_encoding_str (int encoding) ;
73
74 /*------------------------------------------------------------------------------
75 ** Public function.
76 */
77
78 int
79 ircam_open (SF_PRIVATE *psf)
80 { int subformat ;
81 int error = SFE_NO_ERROR ;
82
83 if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
84 { if ((error = ircam_read_header (psf)))
85 return error ;
86 } ;
87
88 subformat = SF_CODEC (psf->sf.format) ;
89
90 if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
91 { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_IRCAM)
92 return SFE_BAD_OPEN_FORMAT ;
93
94 psf->endian = SF_ENDIAN (psf->sf.format) ;
95 if (psf->endian == 0 || psf->endian == SF_ENDIAN_CPU)
96 psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ;
97
98 psf->dataoffset = IRCAM_DATA_OFFSET ;
99
100 if ((error = ircam_write_header (psf, SF_FALSE)))
101 return error ;
102
103 psf->write_header = ircam_write_header ;
104 } ;
105
106 psf->container_close = ircam_close ;
107
108 switch (subformat)
109 { case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */
110 error = ulaw_init (psf) ;
111 break ;
112
113 case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */
114 error = alaw_init (psf) ;
115 break ;
116
117 case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
118 case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
119 error = pcm_init (psf) ;
120 break ;
121
122 case SF_FORMAT_FLOAT : /* 32-bit linear PCM. */
123 error = float32_init (psf) ;
124 break ;
125
126 default : break ;
127 } ;
128
129 return error ;
130 } /* ircam_open */
131
132 /*------------------------------------------------------------------------------
133 */
134
135 static int
136 ircam_read_header (SF_PRIVATE *psf)
137 { unsigned int marker, encoding ;
138 float samplerate ;
139 int error = SFE_NO_ERROR ;
140
141 psf_binheader_readf (psf, "epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
142
143 if (((marker & IRCAM_BE_MASK) != IRCAM_BE_MARKER) && ((marker & IRCAM_LE_MASK) != IRCAM_LE_MARKER))
144 { psf_log_printf (psf, "marker: 0x%X\n", marker) ;
145 return SFE_IRCAM_NO_MARKER ;
146 } ;
147
148 psf->endian = SF_ENDIAN_LITTLE ;
149
150 if (psf->sf.channels > 256)
151 { psf_binheader_readf (psf, "Epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
152
153 /* Sanity checking for endian-ness detection. */
154 if (psf->sf.channels > 256)
155 { psf_log_printf (psf, "marker: 0x%X\n", marker) ;
156 return SFE_IRCAM_BAD_CHANNELS ;
157 } ;
158
159 psf->endian = SF_ENDIAN_BIG ;
160 } ;
161
162 psf_log_printf (psf, "marker: 0x%X\n", marker) ;
163
164 psf->sf.samplerate = (int) samplerate ;
165
166 psf_log_printf (psf, " Sample Rate : %d\n"
167 " Channels : %d\n"
168 " Encoding : %X => %s\n", psf->sf.samplerate, psf->sf.channels, encoding, get_encoding_str (encoding)) ;
169
170 switch (encoding)
171 { case IRCAM_PCM_16 :
172 psf->bytewidth = 2 ;
173 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
174
175 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_16 ;
176 break ;
177
178 case IRCAM_PCM_32 :
179 psf->bytewidth = 4 ;
180 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
181
182 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_32 ;
183 break ;
184
185 case IRCAM_FLOAT :
186 psf->bytewidth = 4 ;
187 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
188
189 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_FLOAT ;
190 break ;
191
192 case IRCAM_ALAW :
193 psf->bytewidth = 1 ;
194 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
195
196 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ALAW ;
197 break ;
198
199 case IRCAM_ULAW :
200 psf->bytewidth = 1 ;
201 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
202
203 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ULAW ;
204 break ;
205
206 default :
207 error = SFE_IRCAM_UNKNOWN_FORMAT ;
208 break ;
209 } ;
210
211 if (psf->endian == SF_ENDIAN_BIG)
212 psf->sf.format |= SF_ENDIAN_BIG ;
213 else
214 psf->sf.format |= SF_ENDIAN_LITTLE ;
215
216 if (error)
217 return error ;
218
219 psf->dataoffset = IRCAM_DATA_OFFSET ;
220 psf->datalength = psf->filelength - psf->dataoffset ;
221
222 if (psf->sf.frames == 0 && psf->blockwidth)
223 psf->sf.frames = psf->datalength / psf->blockwidth ;
224
225 psf_log_printf (psf, " Samples : %d\n", psf->sf.frames) ;
226
227 psf_binheader_readf (psf, "p", IRCAM_DATA_OFFSET) ;
228
229 return 0 ;
230 } /* ircam_read_header */
231
232 static int
233 ircam_close (SF_PRIVATE *psf)
234 {
235 psf_log_printf (psf, "close\n") ;
236
237 return 0 ;
238 } /* ircam_close */
239
240 static int
241 ircam_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
242 { int encoding ;
243 float samplerate ;
244 sf_count_t current ;
245
246 if (psf->pipeoffset > 0)
247 return 0 ;
248
249 current = psf_ftell (psf) ;
250
251 /* This also sets psf->endian. */
252 encoding = get_encoding (SF_CODEC (psf->sf.format)) ;
253
254 if (encoding == 0)
255 return SFE_BAD_OPEN_FORMAT ;
256
257 /* Reset the current header length to zero. */
258 psf->header [0] = 0 ;
259 psf->headindex = 0 ;
260
261 if (psf->is_pipe == SF_FALSE)
262 psf_fseek (psf, 0, SEEK_SET) ;
263
264 samplerate = psf->sf.samplerate ;
265
266 switch (psf->endian)
267 { case SF_ENDIAN_BIG :
268 psf_binheader_writef (psf, "Emf", IRCAM_02B_MARKER, samplerate) ;
269 psf_binheader_writef (psf, "E44", psf->sf.channels, encoding) ;
270 break ;
271
272 case SF_ENDIAN_LITTLE :
273 psf_binheader_writef (psf, "emf", IRCAM_03L_MARKER, samplerate) ;
274 psf_binheader_writef (psf, "e44", psf->sf.channels, encoding) ;
275 break ;
276
277 default : return SFE_BAD_OPEN_FORMAT ;
278 } ;
279
280 psf_binheader_writef (psf, "z", (size_t) (IRCAM_DATA_OFFSET - psf->headindex)) ;
281
282 /* Header construction complete so write it out. */
283 psf_fwrite (psf->header, psf->headindex, 1, psf) ;
284
285 if (psf->error)
286 return psf->error ;
287
288 if (current > 0)
289 psf_fseek (psf, current, SEEK_SET) ;
290
291 return psf->error ;
292 } /* ircam_write_header */
293
294 static int
295 get_encoding (int subformat)
296 { switch (subformat)
297 { case SF_FORMAT_PCM_16 : return IRCAM_PCM_16 ;
298 case SF_FORMAT_PCM_32 : return IRCAM_PCM_32 ;
299
300 case SF_FORMAT_FLOAT : return IRCAM_FLOAT ;
301
302 case SF_FORMAT_ULAW : return IRCAM_ULAW ;
303 case SF_FORMAT_ALAW : return IRCAM_ALAW ;
304
305 default : break ;
306 } ;
307
308 return 0 ;
309 } /* get_encoding */
310
311 static const char*
312 get_encoding_str (int encoding)
313 { switch (encoding)
314 { case IRCAM_PCM_16 : return "16 bit PCM" ;
315 case IRCAM_FLOAT : return "32 bit float" ;
316 case IRCAM_ALAW : return "A law" ;
317 case IRCAM_ULAW : return "u law" ;
318 case IRCAM_PCM_32 : return "32 bit PCM" ;
319 } ;
320 return "Unknown encoding" ;
321 } /* get_encoding_str */
322