+++ /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 */
-
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