Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2002-2011 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 | #include <math.h> |
| 26 | |
| 27 | #include "sndfile.h" |
| 28 | #include "sfendian.h" |
| 29 | #include "common.h" |
| 30 | |
| 31 | /*------------------------------------------------------------------------------ |
| 32 | ** Information on how to decode and encode this file was obtained in a PDF |
| 33 | ** file which I found on http://www.wotsit.org/. |
| 34 | ** Also did a lot of testing with GNU Octave but do not have access to |
| 35 | ** Matlab (tm) and so could not test it there. |
| 36 | */ |
| 37 | |
| 38 | /*------------------------------------------------------------------------------ |
| 39 | ** Macros to handle big/little endian issues. |
| 40 | */ |
| 41 | |
| 42 | #define MAT4_BE_DOUBLE (MAKE_MARKER (0, 0, 0x03, 0xE8)) |
| 43 | #define MAT4_LE_DOUBLE (MAKE_MARKER (0, 0, 0, 0)) |
| 44 | |
| 45 | #define MAT4_BE_FLOAT (MAKE_MARKER (0, 0, 0x03, 0xF2)) |
| 46 | #define MAT4_LE_FLOAT (MAKE_MARKER (0x0A, 0, 0, 0)) |
| 47 | |
| 48 | #define MAT4_BE_PCM_32 (MAKE_MARKER (0, 0, 0x03, 0xFC)) |
| 49 | #define MAT4_LE_PCM_32 (MAKE_MARKER (0x14, 0, 0, 0)) |
| 50 | |
| 51 | #define MAT4_BE_PCM_16 (MAKE_MARKER (0, 0, 0x04, 0x06)) |
| 52 | #define MAT4_LE_PCM_16 (MAKE_MARKER (0x1E, 0, 0, 0)) |
| 53 | |
| 54 | /* Can't see any reason to ever implement this. */ |
| 55 | #define MAT4_BE_PCM_U8 (MAKE_MARKER (0, 0, 0x04, 0x1A)) |
| 56 | #define MAT4_LE_PCM_U8 (MAKE_MARKER (0x32, 0, 0, 0)) |
| 57 | |
| 58 | /*------------------------------------------------------------------------------ |
| 59 | ** Private static functions. |
| 60 | */ |
| 61 | |
| 62 | static int mat4_close (SF_PRIVATE *psf) ; |
| 63 | |
| 64 | static int mat4_format_to_encoding (int format, int endian) ; |
| 65 | |
| 66 | static int mat4_write_header (SF_PRIVATE *psf, int calc_length) ; |
| 67 | static int mat4_read_header (SF_PRIVATE *psf) ; |
| 68 | |
| 69 | static const char * mat4_marker_to_str (int marker) ; |
| 70 | |
| 71 | /*------------------------------------------------------------------------------ |
| 72 | ** Public function. |
| 73 | */ |
| 74 | |
| 75 | int |
| 76 | mat4_open (SF_PRIVATE *psf) |
| 77 | { int subformat, error = 0 ; |
| 78 | |
| 79 | if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0)) |
| 80 | { if ((error = mat4_read_header (psf))) |
| 81 | return error ; |
| 82 | } ; |
| 83 | |
| 84 | if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_MAT4) |
| 85 | return SFE_BAD_OPEN_FORMAT ; |
| 86 | |
| 87 | subformat = SF_CODEC (psf->sf.format) ; |
| 88 | |
| 89 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 90 | { if (psf->is_pipe) |
| 91 | return SFE_NO_PIPE_WRITE ; |
| 92 | |
| 93 | psf->endian = SF_ENDIAN (psf->sf.format) ; |
| 94 | if (CPU_IS_LITTLE_ENDIAN && (psf->endian == SF_ENDIAN_CPU || psf->endian == 0)) |
| 95 | psf->endian = SF_ENDIAN_LITTLE ; |
| 96 | else if (CPU_IS_BIG_ENDIAN && (psf->endian == SF_ENDIAN_CPU || psf->endian == 0)) |
| 97 | psf->endian = SF_ENDIAN_BIG ; |
| 98 | |
| 99 | if ((error = mat4_write_header (psf, SF_FALSE))) |
| 100 | return error ; |
| 101 | |
| 102 | psf->write_header = mat4_write_header ; |
| 103 | } ; |
| 104 | |
| 105 | psf->container_close = mat4_close ; |
| 106 | |
| 107 | psf->blockwidth = psf->bytewidth * psf->sf.channels ; |
| 108 | |
| 109 | switch (subformat) |
| 110 | { case SF_FORMAT_PCM_16 : |
| 111 | case SF_FORMAT_PCM_32 : |
| 112 | error = pcm_init (psf) ; |
| 113 | break ; |
| 114 | |
| 115 | case SF_FORMAT_FLOAT : |
| 116 | error = float32_init (psf) ; |
| 117 | break ; |
| 118 | |
| 119 | case SF_FORMAT_DOUBLE : |
| 120 | error = double64_init (psf) ; |
| 121 | break ; |
| 122 | |
| 123 | default : break ; |
| 124 | } ; |
| 125 | |
| 126 | if (error) |
| 127 | return error ; |
| 128 | |
| 129 | return error ; |
| 130 | } /* mat4_open */ |
| 131 | |
| 132 | /*------------------------------------------------------------------------------ |
| 133 | */ |
| 134 | |
| 135 | static int |
| 136 | mat4_close (SF_PRIVATE *psf) |
| 137 | { |
| 138 | if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR) |
| 139 | mat4_write_header (psf, SF_TRUE) ; |
| 140 | |
| 141 | return 0 ; |
| 142 | } /* mat4_close */ |
| 143 | |
| 144 | /*------------------------------------------------------------------------------ |
| 145 | */ |
| 146 | |
| 147 | static int |
| 148 | mat4_write_header (SF_PRIVATE *psf, int calc_length) |
| 149 | { sf_count_t current ; |
| 150 | int encoding ; |
| 151 | double samplerate ; |
| 152 | |
| 153 | current = psf_ftell (psf) ; |
| 154 | |
| 155 | if (calc_length) |
| 156 | { psf->filelength = psf_get_filelen (psf) ; |
| 157 | |
| 158 | psf->datalength = psf->filelength - psf->dataoffset ; |
| 159 | if (psf->dataend) |
| 160 | psf->datalength -= psf->filelength - psf->dataend ; |
| 161 | |
| 162 | psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ; |
| 163 | } ; |
| 164 | |
| 165 | encoding = mat4_format_to_encoding (SF_CODEC (psf->sf.format), psf->endian) ; |
| 166 | |
| 167 | if (encoding == -1) |
| 168 | return SFE_BAD_OPEN_FORMAT ; |
| 169 | |
| 170 | /* Reset the current header length to zero. */ |
| 171 | psf->header [0] = 0 ; |
| 172 | psf->headindex = 0 ; |
| 173 | psf_fseek (psf, 0, SEEK_SET) ; |
| 174 | |
| 175 | /* Need sample rate as a double for writing to the header. */ |
| 176 | samplerate = psf->sf.samplerate ; |
| 177 | |
| 178 | if (psf->endian == SF_ENDIAN_BIG) |
| 179 | { psf_binheader_writef (psf, "Em444", MAT4_BE_DOUBLE, 1, 1, 0) ; |
| 180 | psf_binheader_writef (psf, "E4bd", 11, "samplerate", make_size_t (11), samplerate) ; |
| 181 | psf_binheader_writef (psf, "tEm484", encoding, psf->sf.channels, psf->sf.frames, 0) ; |
| 182 | psf_binheader_writef (psf, "E4b", 9, "wavedata", make_size_t (9)) ; |
| 183 | } |
| 184 | else if (psf->endian == SF_ENDIAN_LITTLE) |
| 185 | { psf_binheader_writef (psf, "em444", MAT4_LE_DOUBLE, 1, 1, 0) ; |
| 186 | psf_binheader_writef (psf, "e4bd", 11, "samplerate", make_size_t (11), samplerate) ; |
| 187 | psf_binheader_writef (psf, "tem484", encoding, psf->sf.channels, psf->sf.frames, 0) ; |
| 188 | psf_binheader_writef (psf, "e4b", 9, "wavedata", make_size_t (9)) ; |
| 189 | } |
| 190 | else |
| 191 | return SFE_BAD_OPEN_FORMAT ; |
| 192 | |
| 193 | /* Header construction complete so write it out. */ |
| 194 | psf_fwrite (psf->header, psf->headindex, 1, psf) ; |
| 195 | |
| 196 | if (psf->error) |
| 197 | return psf->error ; |
| 198 | |
| 199 | psf->dataoffset = psf->headindex ; |
| 200 | |
| 201 | if (current > 0) |
| 202 | psf_fseek (psf, current, SEEK_SET) ; |
| 203 | |
| 204 | return psf->error ; |
| 205 | } /* mat4_write_header */ |
| 206 | |
| 207 | static int |
| 208 | mat4_read_header (SF_PRIVATE *psf) |
| 209 | { int marker, rows, cols, imag ; |
| 210 | unsigned namesize ; |
| 211 | double value ; |
| 212 | const char *marker_str ; |
| 213 | char name [64] ; |
| 214 | |
| 215 | psf_binheader_readf (psf, "pm", 0, &marker) ; |
| 216 | |
| 217 | /* MAT4 file must start with a double for the samplerate. */ |
| 218 | if (marker == MAT4_BE_DOUBLE) |
| 219 | { psf->endian = psf->rwf_endian = SF_ENDIAN_BIG ; |
| 220 | marker_str = "big endian double" ; |
| 221 | } |
| 222 | else if (marker == MAT4_LE_DOUBLE) |
| 223 | { psf->endian = psf->rwf_endian = SF_ENDIAN_LITTLE ; |
| 224 | marker_str = "little endian double" ; |
| 225 | } |
| 226 | else |
| 227 | return SFE_UNIMPLEMENTED ; |
| 228 | |
| 229 | psf_log_printf (psf, "GNU Octave 2.0 / MATLAB v4.2 format\nMarker : %s\n", marker_str) ; |
| 230 | |
| 231 | psf_binheader_readf (psf, "444", &rows, &cols, &imag) ; |
| 232 | |
| 233 | psf_log_printf (psf, " Rows : %d\n Cols : %d\n Imag : %s\n", rows, cols, imag ? "True" : "False") ; |
| 234 | |
| 235 | psf_binheader_readf (psf, "4", &namesize) ; |
| 236 | |
| 237 | if (namesize >= SIGNED_SIZEOF (name)) |
| 238 | return SFE_MAT4_BAD_NAME ; |
| 239 | |
| 240 | psf_binheader_readf (psf, "b", name, namesize) ; |
| 241 | name [namesize] = 0 ; |
| 242 | |
| 243 | psf_log_printf (psf, " Name : %s\n", name) ; |
| 244 | |
| 245 | psf_binheader_readf (psf, "d", &value) ; |
| 246 | |
| 247 | snprintf (psf->u.cbuf, sizeof (psf->u.cbuf), " Value : %f\n", value) ; |
| 248 | psf_log_printf (psf, psf->u.cbuf) ; |
| 249 | |
| 250 | if ((rows != 1) || (cols != 1)) |
| 251 | return SFE_MAT4_NO_SAMPLERATE ; |
| 252 | |
| 253 | psf->sf.samplerate = lrint (value) ; |
| 254 | |
| 255 | /* Now write out the audio data. */ |
| 256 | |
| 257 | psf_binheader_readf (psf, "m", &marker) ; |
| 258 | |
| 259 | psf_log_printf (psf, "Marker : %s\n", mat4_marker_to_str (marker)) ; |
| 260 | |
| 261 | psf_binheader_readf (psf, "444", &rows, &cols, &imag) ; |
| 262 | |
| 263 | psf_log_printf (psf, " Rows : %d\n Cols : %d\n Imag : %s\n", rows, cols, imag ? "True" : "False") ; |
| 264 | |
| 265 | psf_binheader_readf (psf, "4", &namesize) ; |
| 266 | |
| 267 | if (namesize >= SIGNED_SIZEOF (name)) |
| 268 | return SFE_MAT4_BAD_NAME ; |
| 269 | |
| 270 | psf_binheader_readf (psf, "b", name, namesize) ; |
| 271 | name [namesize] = 0 ; |
| 272 | |
| 273 | psf_log_printf (psf, " Name : %s\n", name) ; |
| 274 | |
| 275 | psf->dataoffset = psf_ftell (psf) ; |
| 276 | |
| 277 | if (rows == 0 && cols == 0) |
| 278 | { psf_log_printf (psf, "*** Error : zero channel count.\n") ; |
| 279 | return SFE_CHANNEL_COUNT_ZERO ; |
| 280 | } ; |
| 281 | |
| 282 | psf->sf.channels = rows ; |
| 283 | psf->sf.frames = cols ; |
| 284 | |
| 285 | psf->sf.format = psf->endian | SF_FORMAT_MAT4 ; |
| 286 | switch (marker) |
| 287 | { case MAT4_BE_DOUBLE : |
| 288 | case MAT4_LE_DOUBLE : |
| 289 | psf->sf.format |= SF_FORMAT_DOUBLE ; |
| 290 | psf->bytewidth = 8 ; |
| 291 | break ; |
| 292 | |
| 293 | case MAT4_BE_FLOAT : |
| 294 | case MAT4_LE_FLOAT : |
| 295 | psf->sf.format |= SF_FORMAT_FLOAT ; |
| 296 | psf->bytewidth = 4 ; |
| 297 | break ; |
| 298 | |
| 299 | case MAT4_BE_PCM_32 : |
| 300 | case MAT4_LE_PCM_32 : |
| 301 | psf->sf.format |= SF_FORMAT_PCM_32 ; |
| 302 | psf->bytewidth = 4 ; |
| 303 | break ; |
| 304 | |
| 305 | case MAT4_BE_PCM_16 : |
| 306 | case MAT4_LE_PCM_16 : |
| 307 | psf->sf.format |= SF_FORMAT_PCM_16 ; |
| 308 | psf->bytewidth = 2 ; |
| 309 | break ; |
| 310 | |
| 311 | default : |
| 312 | psf_log_printf (psf, "*** Error : Bad marker %08X\n", marker) ; |
| 313 | return SFE_UNIMPLEMENTED ; |
| 314 | } ; |
| 315 | |
| 316 | if ((psf->filelength - psf->dataoffset) < psf->sf.channels * psf->sf.frames * psf->bytewidth) |
| 317 | { psf_log_printf (psf, "*** File seems to be truncated. %D <--> %D\n", |
| 318 | psf->filelength - psf->dataoffset, psf->sf.channels * psf->sf.frames * psf->bytewidth) ; |
| 319 | } |
| 320 | else if ((psf->filelength - psf->dataoffset) > psf->sf.channels * psf->sf.frames * psf->bytewidth) |
| 321 | psf->dataend = psf->dataoffset + rows * cols * psf->bytewidth ; |
| 322 | |
| 323 | psf->datalength = psf->filelength - psf->dataoffset - psf->dataend ; |
| 324 | |
| 325 | psf->sf.sections = 1 ; |
| 326 | |
| 327 | return 0 ; |
| 328 | } /* mat4_read_header */ |
| 329 | |
| 330 | static int |
| 331 | mat4_format_to_encoding (int format, int endian) |
| 332 | { |
| 333 | switch (format | endian) |
| 334 | { case (SF_FORMAT_PCM_16 | SF_ENDIAN_BIG) : |
| 335 | return MAT4_BE_PCM_16 ; |
| 336 | |
| 337 | case (SF_FORMAT_PCM_16 | SF_ENDIAN_LITTLE) : |
| 338 | return MAT4_LE_PCM_16 ; |
| 339 | |
| 340 | case (SF_FORMAT_PCM_32 | SF_ENDIAN_BIG) : |
| 341 | return MAT4_BE_PCM_32 ; |
| 342 | |
| 343 | case (SF_FORMAT_PCM_32 | SF_ENDIAN_LITTLE) : |
| 344 | return MAT4_LE_PCM_32 ; |
| 345 | |
| 346 | case (SF_FORMAT_FLOAT | SF_ENDIAN_BIG) : |
| 347 | return MAT4_BE_FLOAT ; |
| 348 | |
| 349 | case (SF_FORMAT_FLOAT | SF_ENDIAN_LITTLE) : |
| 350 | return MAT4_LE_FLOAT ; |
| 351 | |
| 352 | case (SF_FORMAT_DOUBLE | SF_ENDIAN_BIG) : |
| 353 | return MAT4_BE_DOUBLE ; |
| 354 | |
| 355 | case (SF_FORMAT_DOUBLE | SF_ENDIAN_LITTLE) : |
| 356 | return MAT4_LE_DOUBLE ; |
| 357 | |
| 358 | default : break ; |
| 359 | } ; |
| 360 | |
| 361 | return -1 ; |
| 362 | } /* mat4_format_to_encoding */ |
| 363 | |
| 364 | static const char * |
| 365 | mat4_marker_to_str (int marker) |
| 366 | { static char str [32] ; |
| 367 | |
| 368 | switch (marker) |
| 369 | { |
| 370 | case MAT4_BE_PCM_16 : return "big endian 16 bit PCM" ; |
| 371 | case MAT4_LE_PCM_16 : return "little endian 16 bit PCM" ; |
| 372 | |
| 373 | case MAT4_BE_PCM_32 : return "big endian 32 bit PCM" ; |
| 374 | case MAT4_LE_PCM_32 : return "little endian 32 bit PCM" ; |
| 375 | |
| 376 | |
| 377 | case MAT4_BE_FLOAT : return "big endian float" ; |
| 378 | case MAT4_LE_FLOAT : return "big endian float" ; |
| 379 | |
| 380 | case MAT4_BE_DOUBLE : return "big endian double" ; |
| 381 | case MAT4_LE_DOUBLE : return "little endian double" ; |
| 382 | } ; |
| 383 | |
| 384 | /* This is a little unsafe but is really only for debugging. */ |
| 385 | str [sizeof (str) - 1] = 0 ; |
| 386 | snprintf (str, sizeof (str) - 1, "%08X", marker) ; |
| 387 | return str ; |
| 388 | } /* mat4_marker_to_str */ |
| 389 | |