| /* |
| ** 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 */ |
| |