Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 1999-2011 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 | /* |
| 20 | ** Some of the information used to read NIST files was gleaned from |
| 21 | ** reading the code of Bill Schottstaedt's sndlib library |
| 22 | ** ftp://ccrma-ftp.stanford.edu/pub/Lisp/sndlib.tar.gz |
| 23 | ** However, no code from that package was used. |
| 24 | */ |
| 25 | |
| 26 | #include "sfconfig.h" |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <string.h> |
| 31 | #include <ctype.h> |
| 32 | |
| 33 | #include "sndfile.h" |
| 34 | #include "sfendian.h" |
| 35 | #include "common.h" |
| 36 | |
| 37 | /*------------------------------------------------------------------------------ |
| 38 | */ |
| 39 | |
| 40 | #define NIST_HEADER_LENGTH 1024 |
| 41 | |
| 42 | /*------------------------------------------------------------------------------ |
| 43 | ** Private static functions. |
| 44 | */ |
| 45 | |
| 46 | static int nist_close (SF_PRIVATE *psf) ; |
| 47 | static int nist_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 48 | static int nist_read_header (SF_PRIVATE *psf) ; |
| 49 | |
| 50 | /*------------------------------------------------------------------------------ |
| 51 | */ |
| 52 | |
| 53 | int |
| 54 | nist_open (SF_PRIVATE *psf) |
| 55 | { int error ; |
| 56 | |
| 57 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 58 | { if ((error = nist_read_header (psf))) |
| 59 | return error ; |
| 60 | } ; |
| 61 | |
| 62 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 63 | { if (psf->is_pipe) |
| 64 | return SFE_NO_PIPE_WRITE ; |
| 65 | |
| 66 | if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_NIST) |
| 67 | return SFE_BAD_OPEN_FORMAT ; |
| 68 | |
| 69 | psf->endian = SF_ENDIAN (psf->sf.format) ; |
| 70 | if (psf->endian == 0 || psf->endian == SF_ENDIAN_CPU) |
| 71 | psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ; |
| 72 | |
| 73 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 74 | psf->sf.frames = 0 ; |
| 75 | |
| 76 | if ((error = nist_write_header (psf, SF_FALSE))) |
| 77 | return error ; |
| 78 | |
| 79 | psf->write_header = nist_write_header ; |
| 80 | } ; |
| 81 | |
| 82 | psf->container_close = nist_close ; |
| 83 | |
| 84 | switch (SF_CODEC (psf->sf.format)) |
| 85 | { case SF_FORMAT_PCM_S8 : |
| 86 | error = pcm_init (psf) ; |
| 87 | break ; |
| 88 | |
| 89 | case SF_FORMAT_PCM_16 : |
| 90 | case SF_FORMAT_PCM_24 : |
| 91 | case SF_FORMAT_PCM_32 : |
| 92 | error = pcm_init (psf) ; |
| 93 | break ; |
| 94 | |
| 95 | case SF_FORMAT_ULAW : |
| 96 | error = ulaw_init (psf) ; |
| 97 | break ; |
| 98 | |
| 99 | case SF_FORMAT_ALAW : |
| 100 | error = alaw_init (psf) ; |
| 101 | break ; |
| 102 | |
| 103 | default : error = SFE_UNIMPLEMENTED ; |
| 104 | break ; |
| 105 | } ; |
| 106 | |
| 107 | return error ; |
| 108 | } /* nist_open */ |
| 109 | |
| 110 | /*------------------------------------------------------------------------------ |
| 111 | */ |
| 112 | |
| 113 | static char bad_header [] = |
| 114 | { 'N', 'I', 'S', 'T', '_', '1', 'A', 0x0d, 0x0a, |
| 115 | ' ', ' ', ' ', '1', '0', '2', '4', 0x0d, 0x0a, |
| 116 | 0 |
| 117 | } ; |
| 118 | |
| 119 | static int |
| 120 | nist_read_header (SF_PRIVATE *psf) |
| 121 | { char *psf_header ; |
| 122 | int bitwidth = 0, count, encoding ; |
| 123 | unsigned bytes = 0 ; |
| 124 | char str [64], *cptr ; |
| 125 | long samples ; |
| 126 | |
| 127 | psf_header = psf->u.cbuf ; |
| 128 | |
| 129 | if (sizeof (psf->header) <= NIST_HEADER_LENGTH) |
| 130 | return SFE_INTERNAL ; |
| 131 | |
| 132 | /* Go to start of file and read in the whole header. */ |
| 133 | psf_binheader_readf (psf, "pb", 0, psf_header, NIST_HEADER_LENGTH) ; |
| 134 | |
| 135 | /* Header is a string, so make sure it is null terminated. */ |
| 136 | psf_header [NIST_HEADER_LENGTH] = 0 ; |
| 137 | |
| 138 | /* Now trim the header after the end marker. */ |
| 139 | if ((cptr = strstr (psf_header, "end_head"))) |
| 140 | { cptr += strlen ("end_head") + 1 ; |
| 141 | cptr [0] = 0 ; |
| 142 | } ; |
| 143 | |
| 144 | if (strstr (psf_header, bad_header) == psf_header) |
| 145 | return SFE_NIST_CRLF_CONVERISON ; |
| 146 | |
| 147 | /* Make sure its a NIST file. */ |
| 148 | if (strstr (psf_header, "NIST_1A\n") != psf_header) |
| 149 | { psf_log_printf (psf, "Not a NIST file.\n") ; |
| 150 | return SFE_NIST_BAD_HEADER ; |
| 151 | } ; |
| 152 | |
| 153 | if (sscanf (psf_header, "NIST_1A\n%d\n", &count) == 1) |
| 154 | psf->dataoffset = count ; |
| 155 | else |
| 156 | { psf_log_printf (psf, "*** Suspicious header length.\n") ; |
| 157 | psf->dataoffset = NIST_HEADER_LENGTH ; |
| 158 | } ; |
| 159 | |
| 160 | /* Determine sample encoding, start by assuming PCM. */ |
| 161 | encoding = SF_FORMAT_PCM_U8 ; |
| 162 | if ((cptr = strstr (psf_header, "sample_coding -s"))) |
| 163 | { sscanf (cptr, "sample_coding -s%d %63s", &count, str) ; |
| 164 | |
| 165 | if (strcmp (str, "pcm") == 0) |
| 166 | { /* Correct this later when we find out the bitwidth. */ |
| 167 | encoding = SF_FORMAT_PCM_U8 ; |
| 168 | } |
| 169 | else if (strcmp (str, "alaw") == 0) |
| 170 | encoding = SF_FORMAT_ALAW ; |
| 171 | else if ((strcmp (str, "ulaw") == 0) || (strcmp (str, "mu-law") == 0)) |
| 172 | encoding = SF_FORMAT_ULAW ; |
| 173 | else |
| 174 | { psf_log_printf (psf, "*** Unknown encoding : %s\n", str) ; |
| 175 | encoding = 0 ; |
| 176 | } ; |
| 177 | } ; |
| 178 | |
| 179 | if ((cptr = strstr (psf_header, "channel_count -i ")) != NULL) |
| 180 | sscanf (cptr, "channel_count -i %d", &(psf->sf.channels)) ; |
| 181 | |
| 182 | if ((cptr = strstr (psf_header, "sample_rate -i ")) != NULL) |
| 183 | sscanf (cptr, "sample_rate -i %d", &(psf->sf.samplerate)) ; |
| 184 | |
| 185 | if ((cptr = strstr (psf_header, "sample_count -i ")) != NULL) |
| 186 | { sscanf (cptr, "sample_count -i %ld", &samples) ; |
| 187 | psf->sf.frames = samples ; |
| 188 | } ; |
| 189 | |
| 190 | if ((cptr = strstr (psf_header, "sample_n_bytes -i ")) != NULL) |
| 191 | sscanf (cptr, "sample_n_bytes -i %d", &(psf->bytewidth)) ; |
| 192 | |
| 193 | /* Default endian-ness (for 8 bit, u-law, A-law. */ |
| 194 | psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ; |
| 195 | |
| 196 | /* This is where we figure out endian-ness. */ |
| 197 | if ((cptr = strstr (psf_header, "sample_byte_format -s")) |
| 198 | && sscanf (cptr, "sample_byte_format -s%u %8s", &bytes, str) == 2) |
| 199 | { |
| 200 | if (bytes != strlen (str)) |
| 201 | psf_log_printf (psf, "Weird sample_byte_format : strlen '%s' != %d\n", str, bytes) ; |
| 202 | |
| 203 | if (bytes > 1) |
| 204 | { if (psf->bytewidth == 0) |
| 205 | psf->bytewidth = bytes ; |
| 206 | else if (psf->bytewidth - bytes != 0) |
| 207 | { psf_log_printf (psf, "psf->bytewidth (%d) != bytes (%d)\n", psf->bytewidth, bytes) ; |
| 208 | return SFE_NIST_BAD_ENCODING ; |
| 209 | } ; |
| 210 | |
| 211 | if (strcmp (str, "01") == 0) |
| 212 | psf->endian = SF_ENDIAN_LITTLE ; |
| 213 | else if (strcmp (str, "10") == 0) |
| 214 | psf->endian = SF_ENDIAN_BIG ; |
| 215 | else |
| 216 | { psf_log_printf (psf, "Weird endian-ness : %s\n", str) ; |
| 217 | return SFE_NIST_BAD_ENCODING ; |
| 218 | } ; |
| 219 | } ; |
| 220 | |
| 221 | psf->sf.format |= psf->endian ; |
| 222 | } ; |
| 223 | |
| 224 | if ((cptr = strstr (psf_header, "sample_sig_bits -i "))) |
| 225 | sscanf (cptr, "sample_sig_bits -i %d", &bitwidth) ; |
| 226 | |
| 227 | if (strstr (psf_header, "channels_interleaved -s5 FALSE")) |
| 228 | { psf_log_printf (psf, "Non-interleaved data unsupported.\n", str) ; |
| 229 | return SFE_NIST_BAD_ENCODING ; |
| 230 | } ; |
| 231 | |
| 232 | psf->blockwidth = psf->sf.channels * psf->bytewidth ; |
| 233 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 234 | |
| 235 | psf_fseek (psf, psf->dataoffset, SEEK_SET) ; |
| 236 | |
| 237 | if (encoding == SF_FORMAT_PCM_U8) |
| 238 | { switch (psf->bytewidth) |
| 239 | { case 1 : |
| 240 | psf->sf.format |= SF_FORMAT_PCM_S8 ; |
| 241 | break ; |
| 242 | |
| 243 | case 2 : |
| 244 | psf->sf.format |= SF_FORMAT_PCM_16 ; |
| 245 | break ; |
| 246 | |
| 247 | case 3 : |
| 248 | psf->sf.format |= SF_FORMAT_PCM_24 ; |
| 249 | break ; |
| 250 | |
| 251 | case 4 : |
| 252 | psf->sf.format |= SF_FORMAT_PCM_32 ; |
| 253 | break ; |
| 254 | |
| 255 | default : break ; |
| 256 | } ; |
| 257 | } |
| 258 | else if (encoding != 0) |
| 259 | psf->sf.format |= encoding ; |
| 260 | else |
| 261 | return SFE_UNIMPLEMENTED ; |
| 262 | |
| 263 | /* Sanitize psf->sf.format. */ |
| 264 | switch (SF_CODEC (psf->sf.format)) |
| 265 | { case SF_FORMAT_ULAW : |
| 266 | case SF_FORMAT_ALAW : |
| 267 | case SF_FORMAT_PCM_U8 : |
| 268 | /* Blank out endian bits. */ |
| 269 | psf->sf.format = SF_FORMAT_NIST | SF_CODEC (psf->sf.format) ; |
| 270 | break ; |
| 271 | |
| 272 | default : |
| 273 | break ; |
| 274 | } ; |
| 275 | |
| 276 | return 0 ; |
| 277 | } /* nist_read_header */ |
| 278 | |
| 279 | static int |
| 280 | nist_close (SF_PRIVATE *psf) |
| 281 | { |
| 282 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 283 | nist_write_header (psf, SF_TRUE) ; |
| 284 | |
| 285 | return 0 ; |
| 286 | } /* nist_close */ |
| 287 | |
| 288 | /*========================================================================= |
| 289 | */ |
| 290 | |
| 291 | static int |
| 292 | nist_write_header (SF_PRIVATE *psf, int calc_length) |
| 293 | { const char *end_str ; |
| 294 | long samples ; |
| 295 | sf_count_t current ; |
| 296 | |
| 297 | current = psf_ftell (psf) ; |
| 298 | |
| 299 | if (calc_length) |
| 300 | { psf->filelength = psf_get_filelen (psf) ; |
| 301 | |
| 302 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 303 | |
| 304 | if (psf->dataend) |
| 305 | psf->datalength -= psf->filelength - psf->dataend ; |
| 306 | |
| 307 | if (psf->bytewidth > 0) |
| 308 | psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; |
| 309 | } ; |
| 310 | |
| 311 | if (psf->endian == SF_ENDIAN_BIG) |
| 312 | end_str = "10" ; |
| 313 | else if (psf->endian == SF_ENDIAN_LITTLE) |
| 314 | end_str = "01" ; |
| 315 | else |
| 316 | end_str = "error" ; |
| 317 | |
| 318 | /* Clear the whole header. */ |
| 319 | memset (psf->header, 0, sizeof (psf->header)) ; |
| 320 | psf->headindex = 0 ; |
| 321 | |
| 322 | psf_fseek (psf, 0, SEEK_SET) ; |
| 323 | |
| 324 | psf_asciiheader_printf (psf, "NIST_1A\n 1024\n") ; |
| 325 | psf_asciiheader_printf (psf, "channel_count -i %d\n", psf->sf.channels) ; |
| 326 | psf_asciiheader_printf (psf, "sample_rate -i %d\n", psf->sf.samplerate) ; |
| 327 | |
| 328 | switch (SF_CODEC (psf->sf.format)) |
| 329 | { case SF_FORMAT_PCM_S8 : |
| 330 | psf_asciiheader_printf (psf, "sample_coding -s3 pcm\n") ; |
| 331 | psf_asciiheader_printf (psf, "sample_n_bytes -i 1\n" |
| 332 | "sample_sig_bits -i 8\n") ; |
| 333 | break ; |
| 334 | |
| 335 | case SF_FORMAT_PCM_16 : |
| 336 | case SF_FORMAT_PCM_24 : |
| 337 | case SF_FORMAT_PCM_32 : |
| 338 | psf_asciiheader_printf (psf, "sample_n_bytes -i %d\n", psf->bytewidth) ; |
| 339 | psf_asciiheader_printf (psf, "sample_sig_bits -i %d\n", psf->bytewidth * 8) ; |
| 340 | psf_asciiheader_printf (psf, "sample_coding -s3 pcm\n" |
| 341 | "sample_byte_format -s%d %s\n", psf->bytewidth, end_str) ; |
| 342 | break ; |
| 343 | |
| 344 | case SF_FORMAT_ALAW : |
| 345 | psf_asciiheader_printf (psf, "sample_coding -s4 alaw\n") ; |
| 346 | psf_asciiheader_printf (psf, "sample_n_bytes -s1 1\n") ; |
| 347 | break ; |
| 348 | |
| 349 | case SF_FORMAT_ULAW : |
| 350 | psf_asciiheader_printf (psf, "sample_coding -s4 ulaw\n") ; |
| 351 | psf_asciiheader_printf (psf, "sample_n_bytes -s1 1\n") ; |
| 352 | break ; |
| 353 | |
| 354 | default : return SFE_UNIMPLEMENTED ; |
| 355 | } ; |
| 356 | |
| 357 | psf->dataoffset = NIST_HEADER_LENGTH ; |
| 358 | |
| 359 | /* Fix this */ |
| 360 | samples = psf->sf.frames ; |
| 361 | psf_asciiheader_printf (psf, "sample_count -i %ld\n", samples) ; |
| 362 | psf_asciiheader_printf (psf, "end_head\n") ; |
| 363 | |
| 364 | /* Zero fill to dataoffset. */ |
| 365 | psf_binheader_writef (psf, "z", (size_t) (NIST_HEADER_LENGTH - psf->headindex)) ; |
| 366 | |
| 367 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 368 | |
| 369 | if (psf->error) |
| 370 | return psf->error ; |
| 371 | |
| 372 | if (current > 0) |
| 373 | psf_fseek (psf, current, SEEK_SET) ; |
| 374 | |
| 375 | return psf->error ; |
| 376 | } /* nist_write_header */ |
| 377 | |