X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpreter/lib/src/libsndfile-1.0.25/src/nist.c diff --git a/interpreter/lib/src/libsndfile-1.0.25/src/nist.c b/interpreter/lib/src/libsndfile-1.0.25/src/nist.c new file mode 100644 index 0000000..cd3afac --- /dev/null +++ b/interpreter/lib/src/libsndfile-1.0.25/src/nist.c @@ -0,0 +1,377 @@ +/* +** Copyright (C) 1999-2011 Erik de Castro Lopo +** +** 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 +#include +#include +#include + +#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 */ +