--- /dev/null
+/*
+** Copyright (C) 1999-2011 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.
+*/
+
+/*
+** Some of the information used to read NIST files was gleaned from
+** reading the code of Bill Schottstaedt's sndlib library
+** ftp://ccrma-ftp.stanford.edu/pub/Lisp/sndlib.tar.gz
+** However, no code from that package was used.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "sndfile.h"
+#include "sfendian.h"
+#include "common.h"
+
+/*------------------------------------------------------------------------------
+*/
+
+#define NIST_HEADER_LENGTH 1024
+
+/*------------------------------------------------------------------------------
+** Private static functions.
+*/
+
+static int nist_close (SF_PRIVATE *psf) ;
+static int nist_write_header (SF_PRIVATE *psf, int calc_length) ;
+static int nist_read_header (SF_PRIVATE *psf) ;
+
+/*------------------------------------------------------------------------------
+*/
+
+int
+nist_open (SF_PRIVATE *psf)
+{ int error ;
+
+ if (psf->file.mode == SFM_READ || (psf->file.mode == SFM_RDWR && psf->filelength > 0))
+ { if ((error = nist_read_header (psf)))
+ return error ;
+ } ;
+
+ if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
+ { if (psf->is_pipe)
+ return SFE_NO_PIPE_WRITE ;
+
+ if ((SF_CONTAINER (psf->sf.format)) != SF_FORMAT_NIST)
+ 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->blockwidth = psf->bytewidth * psf->sf.channels ;
+ psf->sf.frames = 0 ;
+
+ if ((error = nist_write_header (psf, SF_FALSE)))
+ return error ;
+
+ psf->write_header = nist_write_header ;
+ } ;
+
+ psf->container_close = nist_close ;
+
+ switch (SF_CODEC (psf->sf.format))
+ { case SF_FORMAT_PCM_S8 :
+ error = pcm_init (psf) ;
+ break ;
+
+ case SF_FORMAT_PCM_16 :
+ case SF_FORMAT_PCM_24 :
+ case SF_FORMAT_PCM_32 :
+ error = pcm_init (psf) ;
+ break ;
+
+ case SF_FORMAT_ULAW :
+ error = ulaw_init (psf) ;
+ break ;
+
+ case SF_FORMAT_ALAW :
+ error = alaw_init (psf) ;
+ break ;
+
+ default : error = SFE_UNIMPLEMENTED ;
+ break ;
+ } ;
+
+ return error ;
+} /* nist_open */
+
+/*------------------------------------------------------------------------------
+*/
+
+static char bad_header [] =
+{ 'N', 'I', 'S', 'T', '_', '1', 'A', 0x0d, 0x0a,
+ ' ', ' ', ' ', '1', '0', '2', '4', 0x0d, 0x0a,
+ 0
+} ;
+
+ static int
+nist_read_header (SF_PRIVATE *psf)
+{ char *psf_header ;
+ int bitwidth = 0, count, encoding ;
+ unsigned bytes = 0 ;
+ char str [64], *cptr ;
+ long samples ;
+
+ psf_header = psf->u.cbuf ;
+
+ if (sizeof (psf->header) <= NIST_HEADER_LENGTH)
+ return SFE_INTERNAL ;
+
+ /* Go to start of file and read in the whole header. */
+ psf_binheader_readf (psf, "pb", 0, psf_header, NIST_HEADER_LENGTH) ;
+
+ /* Header is a string, so make sure it is null terminated. */
+ psf_header [NIST_HEADER_LENGTH] = 0 ;
+
+ /* Now trim the header after the end marker. */
+ if ((cptr = strstr (psf_header, "end_head")))
+ { cptr += strlen ("end_head") + 1 ;
+ cptr [0] = 0 ;
+ } ;
+
+ if (strstr (psf_header, bad_header) == psf_header)
+ return SFE_NIST_CRLF_CONVERISON ;
+
+ /* Make sure its a NIST file. */
+ if (strstr (psf_header, "NIST_1A\n") != psf_header)
+ { psf_log_printf (psf, "Not a NIST file.\n") ;
+ return SFE_NIST_BAD_HEADER ;
+ } ;
+
+ if (sscanf (psf_header, "NIST_1A\n%d\n", &count) == 1)
+ psf->dataoffset = count ;
+ else
+ { psf_log_printf (psf, "*** Suspicious header length.\n") ;
+ psf->dataoffset = NIST_HEADER_LENGTH ;
+ } ;
+
+ /* Determine sample encoding, start by assuming PCM. */
+ encoding = SF_FORMAT_PCM_U8 ;
+ if ((cptr = strstr (psf_header, "sample_coding -s")))
+ { sscanf (cptr, "sample_coding -s%d %63s", &count, str) ;
+
+ if (strcmp (str, "pcm") == 0)
+ { /* Correct this later when we find out the bitwidth. */
+ encoding = SF_FORMAT_PCM_U8 ;
+ }
+ else if (strcmp (str, "alaw") == 0)
+ encoding = SF_FORMAT_ALAW ;
+ else if ((strcmp (str, "ulaw") == 0) || (strcmp (str, "mu-law") == 0))
+ encoding = SF_FORMAT_ULAW ;
+ else
+ { psf_log_printf (psf, "*** Unknown encoding : %s\n", str) ;
+ encoding = 0 ;
+ } ;
+ } ;
+
+ if ((cptr = strstr (psf_header, "channel_count -i ")) != NULL)
+ sscanf (cptr, "channel_count -i %d", &(psf->sf.channels)) ;
+
+ if ((cptr = strstr (psf_header, "sample_rate -i ")) != NULL)
+ sscanf (cptr, "sample_rate -i %d", &(psf->sf.samplerate)) ;
+
+ if ((cptr = strstr (psf_header, "sample_count -i ")) != NULL)
+ { sscanf (cptr, "sample_count -i %ld", &samples) ;
+ psf->sf.frames = samples ;
+ } ;
+
+ if ((cptr = strstr (psf_header, "sample_n_bytes -i ")) != NULL)
+ sscanf (cptr, "sample_n_bytes -i %d", &(psf->bytewidth)) ;
+
+ /* Default endian-ness (for 8 bit, u-law, A-law. */
+ psf->endian = (CPU_IS_BIG_ENDIAN) ? SF_ENDIAN_BIG : SF_ENDIAN_LITTLE ;
+
+ /* This is where we figure out endian-ness. */
+ if ((cptr = strstr (psf_header, "sample_byte_format -s"))
+ && sscanf (cptr, "sample_byte_format -s%u %8s", &bytes, str) == 2)
+ {
+ if (bytes != strlen (str))
+ psf_log_printf (psf, "Weird sample_byte_format : strlen '%s' != %d\n", str, bytes) ;
+
+ if (bytes > 1)
+ { if (psf->bytewidth == 0)
+ psf->bytewidth = bytes ;
+ else if (psf->bytewidth - bytes != 0)
+ { psf_log_printf (psf, "psf->bytewidth (%d) != bytes (%d)\n", psf->bytewidth, bytes) ;
+ return SFE_NIST_BAD_ENCODING ;
+ } ;
+
+ if (strcmp (str, "01") == 0)
+ psf->endian = SF_ENDIAN_LITTLE ;
+ else if (strcmp (str, "10") == 0)
+ psf->endian = SF_ENDIAN_BIG ;
+ else
+ { psf_log_printf (psf, "Weird endian-ness : %s\n", str) ;
+ return SFE_NIST_BAD_ENCODING ;
+ } ;
+ } ;
+
+ psf->sf.format |= psf->endian ;
+ } ;
+
+ if ((cptr = strstr (psf_header, "sample_sig_bits -i ")))
+ sscanf (cptr, "sample_sig_bits -i %d", &bitwidth) ;
+
+ if (strstr (psf_header, "channels_interleaved -s5 FALSE"))
+ { psf_log_printf (psf, "Non-interleaved data unsupported.\n", str) ;
+ return SFE_NIST_BAD_ENCODING ;
+ } ;
+
+ psf->blockwidth = psf->sf.channels * psf->bytewidth ;
+ psf->datalength = psf->filelength - psf->dataoffset ;
+
+ psf_fseek (psf, psf->dataoffset, SEEK_SET) ;
+
+ if (encoding == SF_FORMAT_PCM_U8)
+ { switch (psf->bytewidth)
+ { case 1 :
+ psf->sf.format |= SF_FORMAT_PCM_S8 ;
+ break ;
+
+ case 2 :
+ psf->sf.format |= SF_FORMAT_PCM_16 ;
+ break ;
+
+ case 3 :
+ psf->sf.format |= SF_FORMAT_PCM_24 ;
+ break ;
+
+ case 4 :
+ psf->sf.format |= SF_FORMAT_PCM_32 ;
+ break ;
+
+ default : break ;
+ } ;
+ }
+ else if (encoding != 0)
+ psf->sf.format |= encoding ;
+ else
+ return SFE_UNIMPLEMENTED ;
+
+ /* Sanitize psf->sf.format. */
+ switch (SF_CODEC (psf->sf.format))
+ { case SF_FORMAT_ULAW :
+ case SF_FORMAT_ALAW :
+ case SF_FORMAT_PCM_U8 :
+ /* Blank out endian bits. */
+ psf->sf.format = SF_FORMAT_NIST | SF_CODEC (psf->sf.format) ;
+ break ;
+
+ default :
+ break ;
+ } ;
+
+ return 0 ;
+} /* nist_read_header */
+
+static int
+nist_close (SF_PRIVATE *psf)
+{
+ if (psf->file.mode == SFM_WRITE || psf->file.mode == SFM_RDWR)
+ nist_write_header (psf, SF_TRUE) ;
+
+ return 0 ;
+} /* nist_close */
+
+/*=========================================================================
+*/
+
+static int
+nist_write_header (SF_PRIVATE *psf, int calc_length)
+{ const char *end_str ;
+ long samples ;
+ sf_count_t current ;
+
+ current = psf_ftell (psf) ;
+
+ if (calc_length)
+ { psf->filelength = psf_get_filelen (psf) ;
+
+ psf->datalength = psf->filelength - psf->dataoffset ;
+
+ if (psf->dataend)
+ psf->datalength -= psf->filelength - psf->dataend ;
+
+ if (psf->bytewidth > 0)
+ psf->sf.frames = psf->datalength / (psf->bytewidth * psf->sf.channels) ;
+ } ;
+
+ if (psf->endian == SF_ENDIAN_BIG)
+ end_str = "10" ;
+ else if (psf->endian == SF_ENDIAN_LITTLE)
+ end_str = "01" ;
+ else
+ end_str = "error" ;
+
+ /* Clear the whole header. */
+ memset (psf->header, 0, sizeof (psf->header)) ;
+ psf->headindex = 0 ;
+
+ psf_fseek (psf, 0, SEEK_SET) ;
+
+ psf_asciiheader_printf (psf, "NIST_1A\n 1024\n") ;
+ psf_asciiheader_printf (psf, "channel_count -i %d\n", psf->sf.channels) ;
+ psf_asciiheader_printf (psf, "sample_rate -i %d\n", psf->sf.samplerate) ;
+
+ switch (SF_CODEC (psf->sf.format))
+ { case SF_FORMAT_PCM_S8 :
+ psf_asciiheader_printf (psf, "sample_coding -s3 pcm\n") ;
+ psf_asciiheader_printf (psf, "sample_n_bytes -i 1\n"
+ "sample_sig_bits -i 8\n") ;
+ break ;
+
+ case SF_FORMAT_PCM_16 :
+ case SF_FORMAT_PCM_24 :
+ case SF_FORMAT_PCM_32 :
+ psf_asciiheader_printf (psf, "sample_n_bytes -i %d\n", psf->bytewidth) ;
+ psf_asciiheader_printf (psf, "sample_sig_bits -i %d\n", psf->bytewidth * 8) ;
+ psf_asciiheader_printf (psf, "sample_coding -s3 pcm\n"
+ "sample_byte_format -s%d %s\n", psf->bytewidth, end_str) ;
+ break ;
+
+ case SF_FORMAT_ALAW :
+ psf_asciiheader_printf (psf, "sample_coding -s4 alaw\n") ;
+ psf_asciiheader_printf (psf, "sample_n_bytes -s1 1\n") ;
+ break ;
+
+ case SF_FORMAT_ULAW :
+ psf_asciiheader_printf (psf, "sample_coding -s4 ulaw\n") ;
+ psf_asciiheader_printf (psf, "sample_n_bytes -s1 1\n") ;
+ break ;
+
+ default : return SFE_UNIMPLEMENTED ;
+ } ;
+
+ psf->dataoffset = NIST_HEADER_LENGTH ;
+
+ /* Fix this */
+ samples = psf->sf.frames ;
+ psf_asciiheader_printf (psf, "sample_count -i %ld\n", samples) ;
+ psf_asciiheader_printf (psf, "end_head\n") ;
+
+ /* Zero fill to dataoffset. */
+ psf_binheader_writef (psf, "z", (size_t) (NIST_HEADER_LENGTH - psf->headindex)) ;
+
+ 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 ;
+} /* nist_write_header */
+
projects / Faustine.git / blobdiff