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** Copyright (C) 2001-2004 Erik de Castro Lopo <erikd@mega-nerd.com>
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU Lesser General Public License as published by
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** the Free Software Foundation; either version 2.1 of the License, or
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** (at your option) any later version.
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU Lesser General Public License for more details.
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** You should have received a copy of the GNU Lesser General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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/*------------------------------------------------------------------------------
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** Macros to handle big/little endian issues.
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/* The IRCAM magic number is weird in that one byte in the number can have
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** values of 0x1, 0x2, 0x03 or 0x04. Hence the need for a marker and a mask.
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#define IRCAM_BE_MASK (MAKE_MARKER (0xFF, 0xFF, 0x00, 0xFF))
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#define IRCAM_BE_MARKER (MAKE_MARKER (0x64, 0xA3, 0x00, 0x00))
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#define IRCAM_LE_MASK (MAKE_MARKER (0xFF, 0x00, 0xFF, 0xFF))
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#define IRCAM_LE_MARKER (MAKE_MARKER (0x00, 0x00, 0xA3, 0x64))
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#define IRCAM_02B_MARKER (MAKE_MARKER (0x64, 0xA3, 0x02, 0x00))
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#define IRCAM_03L_MARKER (MAKE_MARKER (0x64, 0xA3, 0x03, 0x00))
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#define IRCAM_DATA_OFFSET (1024)
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/*------------------------------------------------------------------------------
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{ IRCAM_PCM_16 = 0x00002,
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IRCAM_FLOAT = 0x00004,
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IRCAM_PCM_32 = 0x40004
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/*------------------------------------------------------------------------------
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** Private static functions.
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static int ircam_close (SF_PRIVATE *psf) ;
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static int ircam_write_header (SF_PRIVATE *psf, int calc_length) ;
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static int ircam_read_header (SF_PRIVATE *psf) ;
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static int get_encoding (int subformat) ;
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static const char* get_encoding_str (int encoding) ;
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/*------------------------------------------------------------------------------
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ircam_open (SF_PRIVATE *psf)
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int error = SFE_NO_ERROR ;
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if (psf->mode == SFM_READ || (psf->mode == SFM_RDWR && psf->filelength > 0))
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{ if ((error = ircam_read_header (psf)))
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subformat = psf->sf.format & SF_FORMAT_SUBMASK ;
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if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR)
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{ if ((psf->sf.format & SF_FORMAT_TYPEMASK) != SF_FORMAT_IRCAM)
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return SFE_BAD_OPEN_FORMAT ;
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psf->endian = psf->sf.format & SF_FORMAT_ENDMASK ;
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if (psf->endian == 0 || psf->endian == SF_ENDIAN_CPU)
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psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ;
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psf->dataoffset = IRCAM_DATA_OFFSET ;
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if ((error = ircam_write_header (psf, SF_FALSE)))
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psf->write_header = ircam_write_header ;
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psf->container_close = ircam_close ;
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{ case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */
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error = ulaw_init (psf) ;
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case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */
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error = alaw_init (psf) ;
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case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
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case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
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error = pcm_init (psf) ;
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case SF_FORMAT_FLOAT : /* 32-bit linear PCM. */
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error = float32_init (psf) ;
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/*------------------------------------------------------------------------------
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ircam_read_header (SF_PRIVATE *psf)
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{ unsigned int marker, encoding ;
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int error = SFE_NO_ERROR ;
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psf_binheader_readf (psf, "epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
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if (((marker & IRCAM_BE_MASK) != IRCAM_BE_MARKER) && ((marker & IRCAM_LE_MASK) != IRCAM_LE_MARKER))
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{ psf_log_printf (psf, "marker: 0x%X\n", marker) ;
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return SFE_IRCAM_NO_MARKER ;
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psf->endian = SF_ENDIAN_LITTLE ;
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if (psf->sf.channels > 256)
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{ psf_binheader_readf (psf, "Epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
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/* Sanity checking for endian-ness detection. */
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if (psf->sf.channels > 256)
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{ psf_log_printf (psf, "marker: 0x%X\n", marker) ;
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return SFE_IRCAM_BAD_CHANNELS ;
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psf->endian = SF_ENDIAN_BIG ;
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psf_log_printf (psf, "marker: 0x%X\n", marker) ;
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psf->sf.samplerate = (int) samplerate ;
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psf_log_printf (psf, " Sample Rate : %d\n"
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" Encoding : %X => %s\n", psf->sf.samplerate, psf->sf.channels, encoding, get_encoding_str (encoding)) ;
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{ case IRCAM_PCM_16 :
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psf->blockwidth = psf->sf.channels * psf->bytewidth ;
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psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_16 ;
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psf->blockwidth = psf->sf.channels * psf->bytewidth ;
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psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_32 ;
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psf->blockwidth = psf->sf.channels * psf->bytewidth ;
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psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_FLOAT ;
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psf->blockwidth = psf->sf.channels * psf->bytewidth ;
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psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ALAW ;
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psf->blockwidth = psf->sf.channels * psf->bytewidth ;
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psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ULAW ;
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error = SFE_IRCAM_UNKNOWN_FORMAT ;
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if (psf->endian == SF_ENDIAN_BIG)
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psf->sf.format |= SF_ENDIAN_BIG ;
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psf->sf.format |= SF_ENDIAN_LITTLE ;
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psf->dataoffset = IRCAM_DATA_OFFSET ;
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psf->datalength = psf->filelength - psf->dataoffset ;
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if (psf->sf.frames == 0 && psf->blockwidth)
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psf->sf.frames = psf->datalength / psf->blockwidth ;
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psf_log_printf (psf, " Samples : %d\n", psf->sf.frames) ;
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psf_binheader_readf (psf, "p", IRCAM_DATA_OFFSET) ;
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} /* ircam_read_header */
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ircam_close (SF_PRIVATE *psf)
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psf_log_printf (psf, "close\n") ;
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ircam_write_header (SF_PRIVATE *psf, int calc_length)
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if (psf->pipeoffset > 0)
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current = psf_ftell (psf) ;
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calc_length = calc_length ;
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/* This also sets psf->endian. */
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encoding = get_encoding (psf->sf.format & SF_FORMAT_SUBMASK) ;
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return SFE_BAD_OPEN_FORMAT ;
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/* Reset the current header length to zero. */
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psf->header [0] = 0 ;
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if (psf->is_pipe == SF_FALSE)
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psf_fseek (psf, 0, SEEK_SET) ;
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samplerate = psf->sf.samplerate ;
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{ case SF_ENDIAN_BIG :
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psf_binheader_writef (psf, "Emf", IRCAM_02B_MARKER, samplerate) ;
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psf_binheader_writef (psf, "E44", psf->sf.channels, encoding) ;
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case SF_ENDIAN_LITTLE :
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psf_binheader_writef (psf, "emf", IRCAM_03L_MARKER, samplerate) ;
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psf_binheader_writef (psf, "e44", psf->sf.channels, encoding) ;
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default : return SFE_BAD_OPEN_FORMAT ;
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psf_binheader_writef (psf, "z", (size_t) (IRCAM_DATA_OFFSET - psf->headindex)) ;
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/* Header construction complete so write it out. */
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psf_fwrite (psf->header, psf->headindex, 1, psf) ;
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psf_fseek (psf, current, SEEK_SET) ;
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} /* ircam_write_header */
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get_encoding (int subformat)
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{ case SF_FORMAT_PCM_16 : return IRCAM_PCM_16 ;
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case SF_FORMAT_PCM_32 : return IRCAM_PCM_32 ;
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case SF_FORMAT_FLOAT : return IRCAM_FLOAT ;
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case SF_FORMAT_ULAW : return IRCAM_ULAW ;
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case SF_FORMAT_ALAW : return IRCAM_ALAW ;
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get_encoding_str (int encoding)
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{ case IRCAM_PCM_16 : return "16 bit PCM" ;
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case IRCAM_FLOAT : return "32 bit float" ;
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case IRCAM_ALAW : return "A law" ;
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case IRCAM_ULAW : return "u law" ;
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case IRCAM_PCM_32 : return "32 bit PCM" ;
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return "Unknown encoding" ;
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} /* get_encoding_str */
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** Do not edit or modify anything in this comment block.
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** The arch-tag line is a file identity tag for the GNU Arch
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** revision control system.
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** arch-tag: f2714ab8-f286-4c94-9740-edaf673a1c71
added
removed
lib-src/libsndfile/src/ircam.c
