--- /dev/null
+/*
+** Copyright (C) 2001-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU Lesser General Public License as published by
+** the Free Software Foundation; either version 2.1 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU Lesser General Public License for more details.
+**
+** You should have received a copy of the GNU Lesser General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "sndfile.h"
+#include "sfendian.h"
+#include "common.h"
+
+/*------------------------------------------------------------------------------
+** Macros to handle big/little endian issues.
+*/
+
+/* The IRCAM magic number is weird in that one byte in the number can have
+** values of 0x1, 0x2, 0x03 or 0x04. Hence the need for a marker and a mask.
+*/
+
+#define IRCAM_BE_MASK (MAKE_MARKER (0xFF, 0xFF, 0x00, 0xFF))
+#define IRCAM_BE_MARKER (MAKE_MARKER (0x64, 0xA3, 0x00, 0x00))
+
+#define IRCAM_LE_MASK (MAKE_MARKER (0xFF, 0x00, 0xFF, 0xFF))
+#define IRCAM_LE_MARKER (MAKE_MARKER (0x00, 0x00, 0xA3, 0x64))
+
+#define IRCAM_02B_MARKER (MAKE_MARKER (0x64, 0xA3, 0x02, 0x00))
+#define IRCAM_03L_MARKER (MAKE_MARKER (0x64, 0xA3, 0x03, 0x00))
+
+#define IRCAM_DATA_OFFSET (1024)
+
+/*------------------------------------------------------------------------------
+** Typedefs.
+*/
+
+enum
+{ IRCAM_PCM_16 = 0x00002,
+ IRCAM_FLOAT = 0x00004,
+ IRCAM_ALAW = 0x10001,
+ IRCAM_ULAW = 0x20001,
+ IRCAM_PCM_32 = 0x40004
+} ;
+
+
+/*------------------------------------------------------------------------------
+** Private static functions.
+*/
+
+static int ircam_close (SF_PRIVATE *psf) ;
+static int ircam_write_header (SF_PRIVATE *psf, int calc_length) ;
+static int ircam_read_header (SF_PRIVATE *psf) ;
+
+static int get_encoding (int subformat) ;
+
+static const char* get_encoding_str (int encoding) ;
+
+/*------------------------------------------------------------------------------
+** Public function.
+*/
+
+int
+ircam_open (SF_PRIVATE *psf)
+{ int subformat ;
+ int error = SFE_NO_ERROR ;
+
+ if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
+ { if ((error = ircam_read_header (psf)))
+ return error ;
+ } ;
+
+ subformat = SF_CODEC (psf->sf.format) ;
+
+ if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
+ { if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_IRCAM)
+ return SFE_BAD_OPEN_FORMAT ;
+
+ psf->endian = SF_ENDIAN (psf->sf.format) ;
+ if (psf->endian == 0 || psf->endian == SF_ENDIAN_CPU)
+ psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ;
+
+ psf->dataoffset = IRCAM_DATA_OFFSET ;
+
+ if ((error = ircam_write_header (psf, SF_FALSE)))
+ return error ;
+
+ psf->write_header = ircam_write_header ;
+ } ;
+
+ psf->container_close = ircam_close ;
+
+ switch (subformat)
+ { case SF_FORMAT_ULAW : /* 8-bit Ulaw encoding. */
+ error = ulaw_init (psf) ;
+ break ;
+
+ case SF_FORMAT_ALAW : /* 8-bit Alaw encoding. */
+ error = alaw_init (psf) ;
+ break ;
+
+ case SF_FORMAT_PCM_16 : /* 16-bit linear PCM. */
+ case SF_FORMAT_PCM_32 : /* 32-bit linear PCM. */
+ error = pcm_init (psf) ;
+ break ;
+
+ case SF_FORMAT_FLOAT : /* 32-bit linear PCM. */
+ error = float32_init (psf) ;
+ break ;
+
+ default : break ;
+ } ;
+
+ return error ;
+} /* ircam_open */
+
+/*------------------------------------------------------------------------------
+*/
+
+static int
+ircam_read_header (SF_PRIVATE *psf)
+{ unsigned int marker, encoding ;
+ float samplerate ;
+ int error = SFE_NO_ERROR ;
+
+ psf_binheader_readf (psf, "epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
+
+ if (((marker & IRCAM_BE_MASK) != IRCAM_BE_MARKER) && ((marker & IRCAM_LE_MASK) != IRCAM_LE_MARKER))
+ { psf_log_printf (psf, "marker: 0x%X\n", marker) ;
+ return SFE_IRCAM_NO_MARKER ;
+ } ;
+
+ psf->endian = SF_ENDIAN_LITTLE ;
+
+ if (psf->sf.channels > 256)
+ { psf_binheader_readf (psf, "Epmf44", 0, &marker, &samplerate, &(psf->sf.channels), &encoding) ;
+
+ /* Sanity checking for endian-ness detection. */
+ if (psf->sf.channels > 256)
+ { psf_log_printf (psf, "marker: 0x%X\n", marker) ;
+ return SFE_IRCAM_BAD_CHANNELS ;
+ } ;
+
+ psf->endian = SF_ENDIAN_BIG ;
+ } ;
+
+ psf_log_printf (psf, "marker: 0x%X\n", marker) ;
+
+ psf->sf.samplerate = (int) samplerate ;
+
+ psf_log_printf (psf, " Sample Rate : %d\n"
+ " Channels : %d\n"
+ " Encoding : %X => %s\n", psf->sf.samplerate, psf->sf.channels, encoding, get_encoding_str (encoding)) ;
+
+ switch (encoding)
+ { case IRCAM_PCM_16 :
+ psf->bytewidth = 2 ;
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_16 ;
+ break ;
+
+ case IRCAM_PCM_32 :
+ psf->bytewidth = 4 ;
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_PCM_32 ;
+ break ;
+
+ case IRCAM_FLOAT :
+ psf->bytewidth = 4 ;
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_FLOAT ;
+ break ;
+
+ case IRCAM_ALAW :
+ psf->bytewidth = 1 ;
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ALAW ;
+ break ;
+
+ case IRCAM_ULAW :
+ psf->bytewidth = 1 ;
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+
+ psf->sf.format = SF_FORMAT_IRCAM | SF_FORMAT_ULAW ;
+ break ;
+
+ default :
+ error = SFE_IRCAM_UNKNOWN_FORMAT ;
+ break ;
+ } ;
+
+ if (psf->endian == SF_ENDIAN_BIG)
+ psf->sf.format |= SF_ENDIAN_BIG ;
+ else
+ psf->sf.format |= SF_ENDIAN_LITTLE ;
+
+ if (error)
+ return error ;
+
+ psf->dataoffset = IRCAM_DATA_OFFSET ;
+ psf->datalength = psf->filelength - psf->dataoffset ;
+
+ if (psf->sf.frames == 0 && psf->blockwidth)
+ psf->sf.frames = psf->datalength / psf->blockwidth ;
+
+ psf_log_printf (psf, " Samples : %d\n", psf->sf.frames) ;
+
+ psf_binheader_readf (psf, "p", IRCAM_DATA_OFFSET) ;
+
+ return 0 ;
+} /* ircam_read_header */
+
+static int
+ircam_close (SF_PRIVATE *psf)
+{
+ psf_log_printf (psf, "close\n") ;
+
+ return 0 ;
+} /* ircam_close */
+
+static int
+ircam_write_header (SF_PRIVATE *psf, int UNUSED (calc_length))
+{ int encoding ;
+ float samplerate ;
+ sf_count_t current ;
+
+ if (psf->pipeoffset > 0)
+ return 0 ;
+
+ current = psf_ftell (psf) ;
+
+ /* This also sets psf->endian. */
+ encoding = get_encoding (SF_CODEC (psf->sf.format)) ;
+
+ if (encoding == 0)
+ return SFE_BAD_OPEN_FORMAT ;
+
+ /* Reset the current header length to zero. */
+ psf->header [0] = 0 ;
+ psf->headindex = 0 ;
+
+ if (psf->is_pipe == SF_FALSE)
+ psf_fseek (psf, 0, SEEK_SET) ;
+
+ samplerate = psf->sf.samplerate ;
+
+ switch (psf->endian)
+ { case SF_ENDIAN_BIG :
+ psf_binheader_writef (psf, "Emf", IRCAM_02B_MARKER, samplerate) ;
+ psf_binheader_writef (psf, "E44", psf->sf.channels, encoding) ;
+ break ;
+
+ case SF_ENDIAN_LITTLE :
+ psf_binheader_writef (psf, "emf", IRCAM_03L_MARKER, samplerate) ;
+ psf_binheader_writef (psf, "e44", psf->sf.channels, encoding) ;
+ break ;
+
+ default : return SFE_BAD_OPEN_FORMAT ;
+ } ;
+
+ psf_binheader_writef (psf, "z", (size_t) (IRCAM_DATA_OFFSET - psf->headindex)) ;
+
+ /* Header construction complete so write it out. */
+ psf_fwrite (psf->header, psf->headindex, 1, psf) ;
+
+ if (psf->error)
+ return psf->error ;
+
+ if (current > 0)
+ psf_fseek (psf, current, SEEK_SET) ;
+
+ return psf->error ;
+} /* ircam_write_header */
+
+static int
+get_encoding (int subformat)
+{ switch (subformat)
+ { case SF_FORMAT_PCM_16 : return IRCAM_PCM_16 ;
+ case SF_FORMAT_PCM_32 : return IRCAM_PCM_32 ;
+
+ case SF_FORMAT_FLOAT : return IRCAM_FLOAT ;
+
+ case SF_FORMAT_ULAW : return IRCAM_ULAW ;
+ case SF_FORMAT_ALAW : return IRCAM_ALAW ;
+
+ default : break ;
+ } ;
+
+ return 0 ;
+} /* get_encoding */
+
+static const char*
+get_encoding_str (int encoding)
+{ switch (encoding)
+ { case IRCAM_PCM_16 : return "16 bit PCM" ;
+ case IRCAM_FLOAT : return "32 bit float" ;
+ case IRCAM_ALAW : return "A law" ;
+ case IRCAM_ULAW : return "u law" ;
+ case IRCAM_PCM_32 : return "32 bit PCM" ;
+ } ;
+ return "Unknown encoding" ;
+} /* get_encoding_str */
+
projects / Faustine.git / blobdiff