Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 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 | |