2 ** Copyright (C) 2001-2009 Erik de Castro Lopo <erikd@mega-nerd.com>
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.
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.
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.
30 /*------------------------------------------------------------------------------
31 ** Macros to handle big/little endian issues.
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.
38 #define IRCAM_BE_MASK (MAKE_MARKER (0xFF, 0xFF, 0x00, 0xFF))
39 #define IRCAM_BE_MARKER (MAKE_MARKER (0x64, 0xA3, 0x00, 0x00))
41 #define IRCAM_LE_MASK (MAKE_MARKER (0xFF, 0x00, 0xFF, 0xFF))
42 #define IRCAM_LE_MARKER (MAKE_MARKER (0x00, 0x00, 0xA3, 0x64))
44 #define IRCAM_02B_MARKER (MAKE_MARKER (0x64, 0xA3, 0x02, 0x00))
45 #define IRCAM_03L_MARKER (MAKE_MARKER (0x64, 0xA3, 0x03, 0x00))
47 #define IRCAM_DATA_OFFSET (1024)
49 /*------------------------------------------------------------------------------
54 { IRCAM_PCM_16 = 0x00002,
55 IRCAM_FLOAT = 0x00004,
58 IRCAM_PCM_32 = 0x40004
62 /*------------------------------------------------------------------------------
63 ** Private static functions.
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) ;
70 static int get_encoding (int subformat) ;
72 static const char* get_encoding_str (int encoding) ;
74 /*------------------------------------------------------------------------------
79 ircam_open (SF_PRIVATE *psf)
81 int error = SFE_NO_ERROR ;
83 if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
84 { if ((error = ircam_read_header (psf)))
88 subformat = SF_CODEC (psf->sf.format) ;
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 ;
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 ;
98 psf->dataoffset = IRCAM_DATA_OFFSET ;
100 if ((error = ircam_write_header (psf, SF_FALSE)))
103 psf->write_header = ircam_write_header ;
106 psf->container_close = ircam_close ;
109 { case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */
110 error = ulaw_init (psf) ;
113 case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */
114 error = alaw_init (psf) ;
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) ;
122 case SF_FORMAT_FLOAT : /* 32-bit linear PCM. */
123 error = float32_init (psf) ;
132 /*------------------------------------------------------------------------------
136 ircam_read_header (SF_PRIVATE *psf)
137 { unsigned int marker, encoding ;
139 int error = SFE_NO_ERROR ;
141 psf_binheader_readf (psf, "epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
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 ;
148 psf->endian = SF_ENDIAN_LITTLE ;
150 if (psf->sf.channels > 256)
151 { psf_binheader_readf (psf, "Epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
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 ;
159 psf->endian = SF_ENDIAN_BIG ;
162 psf_log_printf (psf, "marker: 0x%X\n", marker) ;
164 psf->sf.samplerate = (int) samplerate ;
166 psf_log_printf (psf, " Sample Rate : %d\n"
168 " Encoding : %X => %s\n", psf->sf.samplerate, psf->sf.channels, encoding, get_encoding_str (encoding)) ;
171 { case IRCAM_PCM_16 :
173 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
175 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_16 ;
180 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
182 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_32 ;
187 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
189 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_FLOAT ;
194 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
196 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ALAW ;
201 psf->blockwidth = psf->sf.channels * psf->bytewidth ;
203 psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ULAW ;
207 error = SFE_IRCAM_UNKNOWN_FORMAT ;
211 if (psf->endian == SF_ENDIAN_BIG)
212 psf->sf.format |= SF_ENDIAN_BIG ;
214 psf->sf.format |= SF_ENDIAN_LITTLE ;
219 psf->dataoffset = IRCAM_DATA_OFFSET ;
220 psf->datalength = psf->filelength - psf->dataoffset ;
222 if (psf->sf.frames == 0 && psf->blockwidth)
223 psf->sf.frames = psf->datalength / psf->blockwidth ;
225 psf_log_printf (psf, " Samples : %d\n", psf->sf.frames) ;
227 psf_binheader_readf (psf, "p", IRCAM_DATA_OFFSET) ;
230 } /* ircam_read_header */
233 ircam_close (SF_PRIVATE *psf)
235 psf_log_printf (psf, "close\n") ;
241 ircam_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
246 if (psf->pipeoffset > 0)
249 current = psf_ftell (psf) ;
251 /* This also sets psf->endian. */
252 encoding = get_encoding (SF_CODEC (psf->sf.format)) ;
255 return SFE_BAD_OPEN_FORMAT ;
257 /* Reset the current header length to zero. */
258 psf->header [0] = 0 ;
261 if (psf->is_pipe == SF_FALSE)
262 psf_fseek (psf, 0, SEEK_SET) ;
264 samplerate = psf->sf.samplerate ;
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) ;
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) ;
277 default : return SFE_BAD_OPEN_FORMAT ;
280 psf_binheader_writef (psf, "z", (size_t) (IRCAM_DATA_OFFSET - psf->headindex)) ;
282 /* Header construction complete so write it out. */
283 psf_fwrite (psf->header, psf->headindex, 1, psf) ;
289 psf_fseek (psf, current, SEEK_SET) ;
292 } /* ircam_write_header */
295 get_encoding (int subformat)
297 { case SF_FORMAT_PCM_16 : return IRCAM_PCM_16 ;
298 case SF_FORMAT_PCM_32 : return IRCAM_PCM_32 ;
300 case SF_FORMAT_FLOAT : return IRCAM_FLOAT ;
302 case SF_FORMAT_ULAW : return IRCAM_ULAW ;
303 case SF_FORMAT_ALAW : return IRCAM_ALAW ;
312 get_encoding_str (int 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" ;
320 return "Unknown encoding" ;
321 } /* get_encoding_str */