ref: 5f0d6417237a6895b39ef2a20f9fbbe6689f57fe
dir: /common/libsndfile/src/sndfile.c/
/*
** Copyright (C) 1999-2000 Erik de Castro Lopo <erikd@zip.com.au>
**
** 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 <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
/* For the Metrowerks CodeWarrior Pro Compiler (mainly MacOS) */
#if (defined (__MWERKS__))
#include <stat.h>
#else
#include <sys/stat.h>
#endif
#include "sndfile.h"
#include "config.h"
#include "sfendian.h"
#include "common.h"
#if (CPU_IS_LITTLE_ENDIAN == 1)
# define MAKE_MARKER(a,b,c,d) ((a)|((b)<<8)|((c)<<16)|((d)<<24))
#elif (CPU_IS_BIG_ENDIAN == 1)
# define MAKE_MARKER(a,b,c,d) (((a)<<24)|((b)<<16)|((c)<<8)|(d))
#else
# error "Cannot determine endian-ness of processor."
#endif
#define SNDFILE_MAGICK 0x1234C0DE
typedef struct
{ int error ;
char *str ;
} ErrorStruct ;
static
ErrorStruct SndfileErrors [] =
{
{ SFE_NO_ERROR , "No Error." },
{ SFE_BAD_FILE , "File does not exist or is not a regular file (possibly a pipe?)." },
{ SFE_OPEN_FAILED , "Could not open file." },
{ SFE_BAD_OPEN_FORMAT , "Bad format specified for file open." },
{ SFE_BAD_SNDFILE_PTR , "Not a valid SNDFILE* pointer." },
{ SFE_BAD_SF_INFO_PTR , "NULL SF_INFO pointer passed to libsndfile." },
{ SFE_BAD_INT_FD , "Bad file descriptor." },
{ SFE_BAD_INT_PTR , "Internal error, Bad pointer." },
{ SFE_MALLOC_FAILED , "Internal malloc () failed." },
{ SFE_BAD_SEEK , "Internal fseek() failed." },
{ SFE_NOT_SEEKABLE , "Seek attempted on unseekable file type." },
{ SFE_UNIMPLEMENTED , "File contains data in an unimplemented format." },
{ SFE_BAD_READ_ALIGN , "Attempt to read a non-integer number of channels." },
{ SFE_BAD_WRITE_ALIGN , "Attempt to write a non-integer number of channels." },
{ SFE_UNKNOWN_FORMAT , "File contains data in an unknown format." },
{ SFE_NOT_READMODE , "Read attempted on file currently open for write." },
{ SFE_NOT_WRITEMODE , "Write attempted on file currently open for read." },
{ SFE_BAD_MODE_RW , "This file format does not support read/write mode." },
{ SFE_BAD_SF_INFO , "Internal error : SF_INFO struct incomplete." },
{ SFE_SHORT_READ , "Short read error." },
{ SFE_SHORT_WRITE , "Short write error." },
{ SFE_INTERNAL , "Unspecified internal error." },
{ SFE_WAV_NO_RIFF , "Error in WAV file. No 'RIFF' chunk marker." },
{ SFE_WAV_NO_WAVE , "Error in WAV file. No 'WAVE' chunk marker." },
{ SFE_WAV_NO_FMT , "Error in WAV file. No 'fmt ' chunk marker." },
{ SFE_WAV_FMT_SHORT , "Error in WAV file. Short 'fmt ' chunk." },
{ SFE_WAV_FMT_TOO_BIG , "Error in WAV file. 'fmt ' chunk too large." },
{ SFE_WAV_BAD_FORMAT , "Error in WAV file. Errors in 'fmt ' chunk." },
{ SFE_WAV_BAD_BLOCKALIGN , "Error in WAV file. Block alignment in 'fmt ' chunk is incorrect." },
{ SFE_WAV_NO_DATA , "Error in WAV file. No 'data' chunk marker." },
{ SFE_WAV_UNKNOWN_CHUNK , "Error in WAV file. File contains an unknown chunk marker." },
{ SFE_WAV_ADPCM_NOT4BIT , "Error in ADPCM WAV file. Invalid bit width."},
{ SFE_WAV_ADPCM_CHANNELS , "Error in ADPCM WAV file. Invalid number of channels."},
{ SFE_WAV_GSM610_FORMAT , "Error in GSM610 WAV file. Invalid format chunk."},
{ SFE_AIFF_NO_FORM , "Error in AIFF file, bad 'FORM' marker."},
{ SFE_AIFF_UNKNOWN_CHUNK , "Error in AIFF file, unknown chunk."},
{ SFE_COMM_CHUNK_SIZE , "Error in AIFF file, bad 'COMM' chunk size."},
{ SFE_AIFF_NO_SSND , "Error in AIFF file, bad 'SSND' chunk."},
{ SFE_AIFF_NO_DATA , "Error in AIFF file, no sound data."},
{ SFE_AU_UNKNOWN_FORMAT , "Error in AU file, unknown format."},
{ SFE_AU_NO_DOTSND , "Error in AU file, missing '.snd' or 'dns.' marker."},
{ SFE_RAW_READ_BAD_SPEC , "Error while opening RAW file for read. Must specify format, pcmbitwidth and channels."},
{ SFE_RAW_BAD_BITWIDTH , "Error. RAW file bitwidth must be a multiple of 8."},
{ SFE_PAF_NO_MARKER , "Error in PAF file, no marker."},
{ SFE_PAF_VERSION , "Error in PAF file, bad version."},
{ SFE_PAF_UNKNOWN_FORMAT , "Error in PAF file, unknown format."},
{ SFE_PAF_SHORT_HEADER , "Error in PAF file. File shorter than minimal header."},
{ SFE_SVX_NO_FORM , "Error in 8SVX / 16SV file, no 'FORM' marker."},
{ SFE_SVX_NO_BODY , "Error in 8SVX / 16SV file, no 'BODY' marker."},
{ SFE_SVX_NO_DATA , "Error in 8SVX / 16SV file, no sound data."},
{ SFE_SVX_BAD_COMP , "Error in 8SVX / 16SV file, unsupported compression format."},
{ SFE_NIST_BAD_HEADER , "Error in NIST file, bad header."},
{ SFE_NIST_BAD_ENCODING , "Error in NIST file, unsupported compression format."},
{ SFE_MAX_ERROR , "Maximum error number." }
} ;
/*------------------------------------------------------------------------------
** Private (static) variables.
*/
static int sf_errno = 0 ;
static char sf_strbuffer [SF_BUFFER_LEN] = { 0 } ;
/*------------------------------------------------------------------------------
** Private static functions.
*/
#define VALIDATE_SNDFILE_AND_ASSIGN_PSF(a,b) \
{ if (! (a)) \
return SFE_BAD_SNDFILE_PTR ; \
(b) = (SF_PRIVATE*) (a) ; \
if (!((b)->file)) \
return SFE_BAD_INT_FD ; \
if ((b)->Magick != SNDFILE_MAGICK) \
return SFE_BAD_SNDFILE_PTR ; \
(b)->error = 0 ; \
}
static
int does_extension_match (const char *ext, const char *test)
{ char c1, c2 ;
if ((! ext) || (! test))
return 0 ;
if (strlen (ext) != strlen (test))
return 0 ;
while (*ext && *test)
{ c1 = tolower (*ext) ;
c2 = tolower (*test) ;
if (c1 > c2)
return 0 ;
if (c1 < c2)
return 0 ;
ext ++ ;
test ++ ;
}
return 1 ;
} /* does_extension_match */
static
int is_au_snd_file (const char *filename)
{ const char *cptr ;
if (! (cptr = strrchr (filename, '.')))
return 0 ;
cptr ++ ;
if (does_extension_match (cptr, "au"))
return 1 ;
if (does_extension_match (cptr, "snd"))
return 1 ;
return 0 ;
} /* is_au_snd_file */
static
int guess_file_type (FILE *file, const char *filename)
{ unsigned int buffer [3] ;
fread (buffer, sizeof(buffer), 1, file) ;
fseek (file, 0, SEEK_SET) ;
if (buffer [0] == MAKE_MARKER ('R','I','F','F') && buffer [2] == MAKE_MARKER ('W','A','V','E'))
return SF_FORMAT_WAV ;
if (buffer [0] == MAKE_MARKER ('F','O','R','M'))
{ if (buffer [2] == MAKE_MARKER ('A','I','F','F') || buffer [2] == MAKE_MARKER ('A','I','F','C'))
return SF_FORMAT_AIFF ;
if (buffer [2] == MAKE_MARKER ('8','S','V','X') || buffer [2] == MAKE_MARKER ('1','6','S','V'))
return SF_FORMAT_SVX ;
return 0 ;
} ;
if ((buffer [0] == MAKE_MARKER ('.','s','n','d') || buffer [0] == MAKE_MARKER ('d','n','s','.')))
return SF_FORMAT_AU ;
if ((buffer [0] == MAKE_MARKER ('f','a','p',' ') || buffer [0] == MAKE_MARKER (' ','p','a','f')))
return SF_FORMAT_PAF ;
if (buffer [0] == MAKE_MARKER ('N','I','S','T'))
return SF_FORMAT_NIST ;
if (filename && is_au_snd_file (filename))
return SF_FORMAT_AU | SF_FORMAT_ULAW ;
/* Default to header-less RAW PCM file type. */
return SF_FORMAT_RAW ;
} /* guess_file_type */
static
int validate_sfinfo (SF_INFO *sfinfo)
{ if (! sfinfo->samplerate)
return 0 ;
if (! sfinfo->samples)
return 0 ;
if (! sfinfo->channels)
return 0 ;
if (! sfinfo->pcmbitwidth)
return 0 ;
if (! sfinfo->format & SF_FORMAT_TYPEMASK)
return 0 ;
if (! sfinfo->format & SF_FORMAT_SUBMASK)
return 0 ;
if (! sfinfo->sections)
return 0 ;
return 1 ;
} /* validate_sfinfo */
static
int validate_psf (SF_PRIVATE *psf)
{ if (! psf->blockwidth)
return 0 ;
if (! psf->bytewidth)
return 0 ;
if (! psf->datalength)
return 0 ;
if (psf->blockwidth != psf->sf.channels * psf->bytewidth)
return 0 ;
return 1 ;
} /* validate_psf */
static
void save_header_info (SF_PRIVATE *psf)
{ memset (sf_strbuffer, 0, sizeof (sf_strbuffer)) ;
strcpy (sf_strbuffer, psf->strbuffer) ;
} /* validate_psf */
static
void copy_filename (SF_PRIVATE *psf, const char *path)
{ const char *cptr ;
if ((cptr = strrchr (path, '/')) || (cptr = strrchr (path, '\\')))
cptr ++ ;
else
cptr = path ;
memset (psf->filename, 0, SF_FILENAME_LEN) ;
strncpy (psf->filename, cptr, SF_FILENAME_LEN - 1) ;
psf->filename [SF_FILENAME_LEN - 1] = 0 ;
} /* copy_filename */
/*------------------------------------------------------------------------------
** Public functions.
*/
SNDFILE* sf_open_read (const char *path, SF_INFO *sfinfo)
{ SF_PRIVATE *psf ;
int filetype, seekable ;
if (! sfinfo)
{ sf_errno = SFE_BAD_SF_INFO_PTR ;
return NULL ;
} ;
sf_errno = 0 ;
sf_strbuffer [0] = 0 ;
psf = malloc (sizeof (SF_PRIVATE)) ;
if (! psf)
{ sf_errno = SFE_MALLOC_FAILED ;
return NULL ;
} ;
memset (psf, 0, sizeof (SF_PRIVATE)) ;
psf->Magick = SNDFILE_MAGICK ;
if (! strcmp (path, "-"))
{ psf->file = stdin ;
seekable = SF_FALSE ;
}
else
{ /* fopen with 'b' means binary file mode for Win32 systems. */
psf->file = fopen (path, "rb") ;
seekable = SF_TRUE ;
} ;
if (! psf->file)
{ sf_errno = SFE_OPEN_FAILED ;
sf_close (psf) ;
return NULL ;
} ;
psf->mode = SF_MODE_READ ;
psf_sprintf (psf, "%s\n", path) ;
if (seekable)
{ fseek (psf->file, 0, SEEK_END) ;
psf->filelength = ftell (psf->file) ;
fseek (psf->file, 0, SEEK_SET) ;
psf_sprintf (psf, "size : %d\n", psf->filelength) ;
}
else
psf->filelength = 2048 ;
copy_filename (psf, path) ;
filetype = guess_file_type (psf->file, psf->filename) ;
fseek (psf->file, 0, SEEK_SET) ;
switch (filetype)
{ case SF_FORMAT_WAV :
sf_errno = wav_open_read (psf) ;
break ;
case SF_FORMAT_AIFF :
sf_errno = aiff_open_read (psf) ;
break ;
case SF_FORMAT_AU :
sf_errno = au_open_read (psf) ;
break ;
case SF_FORMAT_AU | SF_FORMAT_ULAW :
psf_sprintf (psf, "Headers-less u-law encoded file.\n") ;
sf_errno = au_nh_open_read (psf) ;
break ;
case SF_FORMAT_RAW :
/* For RAW files, need the sfinfo struct data to
** figure out the bitwidth, endian-ness etc.
*/
memcpy (&(psf->sf), sfinfo, sizeof (SF_INFO)) ;
sf_errno = raw_open_read (psf) ;
break ;
case SF_FORMAT_PAF :
sf_errno = paf_open_read (psf) ;
break ;
case SF_FORMAT_SVX :
sf_errno = svx_open_read (psf) ;
break ;
default :
sf_errno = SFE_UNKNOWN_FORMAT ;
} ;
/* Both the file format and the file must be seekable to enable sf_seek(). */
psf->sf.seekable = (psf->sf.seekable && seekable) ? SF_TRUE : SF_FALSE ;
if (sf_errno)
{ save_header_info (psf) ;
sf_close (psf) ;
return NULL ;
} ;
if (! validate_sfinfo (&(psf->sf)))
{ save_header_info (psf) ;
sf_errno = SFE_BAD_SF_INFO ;
sf_close (psf) ;
return NULL ;
} ;
if (! validate_psf (psf))
{ save_header_info (psf) ;
sf_errno = SFE_INTERNAL ;
sf_close (psf) ;
return NULL ;
} ;
memcpy (sfinfo, &(psf->sf), sizeof (SF_INFO)) ;
return (SNDFILE*) psf ;
} /* sf_open_read */
/*------------------------------------------------------------------------------
*/
SNDFILE* sf_open_write (const char *path, const SF_INFO *sfinfo)
{ SF_PRIVATE *psf ;
if (! sfinfo)
{ sf_errno = SFE_BAD_SF_INFO_PTR ;
return NULL ;
} ;
if (! sf_format_check (sfinfo))
{ sf_errno = SFE_BAD_OPEN_FORMAT ;
return NULL ;
} ;
sf_errno = 0 ;
sf_strbuffer [0] = 0 ;
psf = malloc (sizeof (SF_PRIVATE)) ;
if (! psf)
{ sf_errno = SFE_MALLOC_FAILED ;
return NULL ;
} ;
memset (psf, 0, sizeof (SF_PRIVATE)) ;
memcpy (&(psf->sf), sfinfo, sizeof (SF_INFO)) ;
psf->Magick = SNDFILE_MAGICK ;
/* fopen with 'b' means binary file mode for Win32 systems. */
if (! (psf->file = fopen (path, "wb")))
{ sf_errno = SFE_OPEN_FAILED ;
sf_close (psf) ;
return NULL ;
} ;
psf->mode = SF_MODE_WRITE ;
psf->filelength = ftell (psf->file) ;
fseek (psf->file, 0, SEEK_SET) ;
copy_filename (psf, path) ;
switch (sfinfo->format & SF_FORMAT_TYPEMASK)
{ case SF_FORMAT_WAV :
if ((sf_errno = wav_open_write (psf)))
{ sf_close (psf) ;
return NULL ;
} ;
break ;
case SF_FORMAT_AIFF :
if ((sf_errno = aiff_open_write (psf)))
{ sf_close (psf) ;
return NULL ;
} ;
break ;
case SF_FORMAT_AU :
case SF_FORMAT_AULE :
if ((sf_errno = au_open_write (psf)))
{ sf_close (psf) ;
return NULL ;
} ;
break ;
case SF_FORMAT_RAW :
if ((sf_errno = raw_open_write (psf)))
{ sf_close (psf) ;
return NULL ;
} ;
break ;
case SF_FORMAT_PAF :
if ((sf_errno = paf_open_write (psf)))
{ sf_close (psf) ;
return NULL ;
} ;
break ;
case SF_FORMAT_SVX :
if ((sf_errno = svx_open_write (psf)))
{ sf_close (psf) ;
return NULL ;
} ;
break ;
default :
sf_errno = SFE_UNKNOWN_FORMAT ;
sf_close (psf) ;
return NULL ;
} ;
return (SNDFILE*) psf ;
} /* sf_open_write */
/*------------------------------------------------------------------------------
*/
int sf_perror (SNDFILE *sndfile)
{ SF_PRIVATE *psf ;
int k, errnum ;
if (! sndfile)
{ errnum = sf_errno ;
}
else
{ VALIDATE_SNDFILE_AND_ASSIGN_PSF(sndfile,psf) ;
errnum = psf->error ;
} ;
errnum = (errnum >= SFE_MAX_ERROR || errnum < 0) ? 0 : errnum ;
for (k = 0 ; SndfileErrors[k].str ; k++)
if (errnum == SndfileErrors[k].error)
{ printf ("%s\n", SndfileErrors[k].str) ;
return SFE_NO_ERROR ;
} ;
printf ("No error string for error number %d.\n", errnum) ;
return SFE_NO_ERROR ;
} /* sf_perror */
/*------------------------------------------------------------------------------
*/
int sf_error_str (SNDFILE *sndfile, char *str, size_t maxlen)
{ SF_PRIVATE *psf ;
int errnum, k ;
if (! sndfile)
{ errnum = sf_errno ;
}
else
{ VALIDATE_SNDFILE_AND_ASSIGN_PSF(sndfile,psf) ;
errnum = psf->error ;
} ;
errnum = (errnum >= SFE_MAX_ERROR || errnum < 0) ? 0 : errnum ;
for (k = 0 ; SndfileErrors[k].str ; k++)
if (errnum == SndfileErrors[k].error)
{ strncpy (str, SndfileErrors [errnum].str, maxlen) ;
str [maxlen-1] = 0 ;
return SFE_NO_ERROR ;
} ;
strncpy (str, "No error defined for this error number. This is a bug in libsndfile.", maxlen) ;
str [maxlen-1] = 0 ;
return SFE_NO_ERROR ;
} /* sf_error_str */
/*------------------------------------------------------------------------------
*/
int sf_error_number (int errnum, char *str, size_t maxlen)
{ int k ;
errnum = (errnum >= SFE_MAX_ERROR || errnum < 0) ? 0 : errnum ;
for (k = 0 ; SndfileErrors[k].str ; k++)
if (errnum == SndfileErrors[k].error)
{ strncpy (str, SndfileErrors [errnum].str, maxlen) ;
str [maxlen-1] = 0 ;
return SFE_NO_ERROR ;
} ;
strncpy (str, "No error defined for this error number. This is a bug in libsndfile.", maxlen) ;
str [maxlen-1] = 0 ;
return SFE_NO_ERROR ;
} /* sf_error_number */
/*------------------------------------------------------------------------------
*/
int sf_format_check (const SF_INFO *info)
{ int subformat = info->format & SF_FORMAT_SUBMASK ;
/* This is the place where each file format can check if the suppiled
** SF_INFO struct is valid.
** Return 0 on failure, 1 ons success.
*/
if (info->channels < 1 || info->channels > 256)
return 0 ;
switch (info->format & SF_FORMAT_TYPEMASK)
{ case SF_FORMAT_WAV :
if (subformat == SF_FORMAT_PCM && (info->pcmbitwidth >= 8 && info->pcmbitwidth <= 32))
return 1 ;
if (subformat == SF_FORMAT_FLOAT && info->pcmbitwidth == 32)
return 1 ;
if (subformat == SF_FORMAT_IMA_ADPCM && info->pcmbitwidth == 16 && info->channels <= 2)
return 1 ;
if (subformat == SF_FORMAT_MS_ADPCM && info->pcmbitwidth == 16 && info->channels <= 2)
return 1 ;
if (subformat == SF_FORMAT_GSM610 && info->pcmbitwidth == 16 && info->channels == 1)
return 1 ;
if (subformat == SF_FORMAT_ULAW || subformat == SF_FORMAT_ALAW)
return 1 ;
break ;
case SF_FORMAT_AIFF :
if (subformat == SF_FORMAT_PCM && (info->pcmbitwidth >= 8 && info->pcmbitwidth <= 32))
return 1 ;
break ;
case SF_FORMAT_AU :
case SF_FORMAT_AULE :
if (subformat == SF_FORMAT_PCM && (info->pcmbitwidth >= 8 && info->pcmbitwidth <= 32))
return 1 ;
if (subformat == SF_FORMAT_ULAW)
return 1 ;
if (subformat == SF_FORMAT_ALAW)
return 1 ;
if (subformat == SF_FORMAT_G721_32 && info->channels == 1)
return 1 ;
if (subformat == SF_FORMAT_G723_24 && info->channels == 1)
return 1 ;
break ;
case SF_FORMAT_RAW :
if (subformat == SF_FORMAT_PCM_S8 && info->pcmbitwidth == 8)
return 1 ;
if (subformat == SF_FORMAT_PCM_U8 && info->pcmbitwidth == 8)
return 1 ;
if (subformat != SF_FORMAT_PCM_BE && subformat != SF_FORMAT_PCM_LE)
break ;
if (info->pcmbitwidth % 8 || info->pcmbitwidth > 32)
break ;
return 1 ;
break ;
case SF_FORMAT_PAF :
if (subformat == SF_FORMAT_PCM_S8 && info->pcmbitwidth == 8)
return 1 ;
if (subformat != SF_FORMAT_PCM_BE && subformat != SF_FORMAT_PCM_LE)
break ;
if (info->pcmbitwidth % 8 || info->pcmbitwidth > 24)
break ;
return 1 ;
break ;
case SF_FORMAT_SVX :
if (subformat == SF_FORMAT_PCM && (info->pcmbitwidth == 8 || info->pcmbitwidth == 16))
return 1 ;
break ;
default : break ;
} ;
return 0 ;
} /* sf_format_check */
/*------------------------------------------------------------------------------
*/
size_t sf_get_header_info (SNDFILE *sndfile, char *buffer, size_t bufferlen, size_t offset)
{ SF_PRIVATE *psf ;
int len ;
if (! sndfile)
{ strncpy (buffer, sf_strbuffer, bufferlen - 1) ;
buffer [bufferlen - 1] = 0 ;
return strlen (sf_strbuffer) ;
} ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
len = strlen (psf->strbuffer) ;
if (offset < 0 || offset >= len)
return 0 ;
strncpy (buffer, psf->strbuffer, bufferlen - 1) ;
buffer [bufferlen - 1] = 0 ;
return strlen (psf->strbuffer) ;
} /* sf_get_header_info */
/*------------------------------------------------------------------------------
*/
size_t sf_get_lib_version (char *buffer, size_t bufferlen)
{ if (! buffer || ! bufferlen)
return 0 ;
strncpy (buffer, PACKAGE, bufferlen - 1) ;
buffer [bufferlen - 1] = 0 ;
strncat (buffer, "-", bufferlen - strlen (buffer) - 1) ;
strncat (buffer, VERSION, bufferlen - strlen (buffer) - 1) ;
return strlen (buffer) ;
} /* sf_get_lib_version */
/*------------------------------------------------------------------------------
*/
double sf_signal_max (SNDFILE *sndfile)
{ SF_PRIVATE *psf ;
off_t position ;
unsigned int k, len, readcount ;
double max = 0.0, *data, temp ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (! psf->sf.seekable)
{ psf->error = SFE_NOT_SEEKABLE ;
return 0.0 ;
} ;
if (! psf->read_double)
{ psf->error = SFE_UNIMPLEMENTED ;
return -1 ;
} ;
position = sf_seek (sndfile, 0, SEEK_CUR) ; /* Get current position in file */
sf_seek (sndfile, 0, SEEK_SET) ; /* Go to start of file. */
len = psf->sf.channels * 1024 ;
data = malloc (len * sizeof (double)) ;
readcount = len ;
while (readcount == len)
{ readcount = psf->read_double (psf, data, len, 0) ;
for (k = 0 ; k < len ; k++)
{ temp = data [k] ;
temp = temp < 0.0 ? -temp : temp ;
max = temp > max ? temp : max ;
} ;
} ;
free (data) ;
sf_seek (sndfile, position, SEEK_SET) ; /* Return to original position. */
return max ;
} /* sf_signal_max */
/*------------------------------------------------------------------------------
*/
off_t sf_seek (SNDFILE *sndfile, off_t offset, int whence)
{ SF_PRIVATE *psf ;
off_t realseek, position ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (! psf->sf.seekable)
{ psf->error = SFE_NOT_SEEKABLE ;
return ((off_t) -1) ;
} ;
if (psf->seek_func)
return psf->seek_func (psf, offset, whence) ;
if (! (psf->blockwidth && psf->datalength && psf->dataoffset))
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
switch (whence)
{ case SEEK_SET :
if (offset < 0 || offset * psf->blockwidth > psf->datalength)
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
realseek = psf->dataoffset + offset * psf->blockwidth ;
fseek (psf->file, realseek, SEEK_SET) ;
position = ftell (psf->file) ;
break ;
case SEEK_CUR :
realseek = offset * psf->blockwidth ;
position = ftell (psf->file) - psf->dataoffset ;
if (position + realseek > psf->datalength || position + realseek < 0)
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
fseek (psf->file, realseek, SEEK_CUR) ;
position = ftell (psf->file) ;
break ;
case SEEK_END :
if (offset > 0 || psf->sf.samples + offset < 0)
{ psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
realseek = (psf->sf.samples + offset) * psf->blockwidth + psf->dataoffset ;
fseek (psf->file, realseek, SEEK_SET) ;
position = ftell (psf->file) ;
break ;
default :
psf->error = SFE_BAD_SEEK ;
return ((off_t) -1) ;
} ;
psf->current = (position - psf->dataoffset) / psf->blockwidth ;
return psf->current ;
} /* sf_seek */
/*------------------------------------------------------------------------------
*/
size_t sf_read_raw (SNDFILE *sndfile, void *ptr, size_t bytes)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_READ)
{ psf->error = SFE_NOT_READMODE ;
return ((size_t) -1) ;
} ;
if (psf->current >= psf->datalength)
{ memset (ptr, 0, bytes) ;
return 0 ;
} ;
if (bytes % (psf->sf.channels * psf->bytewidth))
{ psf->error = SFE_BAD_READ_ALIGN ;
return (size_t) -1 ;
} ;
count = fread (ptr, 1, bytes, psf->file) ;
if (count < bytes)
memset (((char*)ptr) + count, 0, bytes - count) ;
psf->current += count / psf->blockwidth ;
return count ;
} /* sf_read_raw */
/*------------------------------------------------------------------------------
*/
size_t sf_read_short (SNDFILE *sndfile, short *ptr, size_t len)
{ SF_PRIVATE *psf ;
size_t count, extra ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_READ)
{ psf->error = SFE_NOT_READMODE ;
return (size_t) -1 ;
} ;
if (len % psf->sf.channels)
{ psf->error = SFE_BAD_READ_ALIGN ;
return (size_t) -1 ;
} ;
if (psf->current >= psf->sf.samples)
{ memset (ptr, 0, len * sizeof (short)) ;
return 0 ; /* End of file. */
} ;
if (! psf->read_short)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->read_short (psf, ptr, len) ;
if (psf->current + count / psf->sf.channels > psf->sf.samples)
{ count = (psf->sf.samples - psf->current) * psf->sf.channels ;
extra = len - count ;
memset (ptr + count, 0, extra * sizeof (short)) ;
psf->current = psf->sf.samples ;
} ;
psf->current += count / psf->sf.channels ;
return count ;
} /* sf_read_short */
size_t sf_readf_short (SNDFILE *sndfile, short *ptr, size_t frames)
{ SF_PRIVATE *psf ;
size_t count, extra ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_READ)
{ psf->error = SFE_NOT_READMODE ;
return (size_t) -1 ;
} ;
if (psf->current >= psf->sf.samples)
{ memset (ptr, 0, frames * psf->sf.channels * sizeof (short)) ;
return 0 ; /* End of file. */
} ;
if (! psf->read_short)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->read_short (psf, ptr, frames * psf->sf.channels) ;
if (psf->current + count / psf->sf.channels > psf->sf.samples)
{ count = (psf->sf.samples - psf->current) * psf->sf.channels ;
extra = frames * psf->sf.channels - count ;
memset (ptr + count, 0, extra * sizeof (short)) ;
psf->current = psf->sf.samples ;
} ;
psf->current += count / psf->sf.channels ;
return count / psf->sf.channels ;
} /* sf_readf_short */
/*------------------------------------------------------------------------------
*/
size_t sf_read_int (SNDFILE *sndfile, int *ptr, size_t len)
{ SF_PRIVATE *psf ;
size_t count, extra ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_READ)
return SFE_NOT_READMODE ;
if (len % psf->sf.channels)
return (psf->error = SFE_BAD_READ_ALIGN) ;
if (psf->current >= psf->sf.samples)
{ memset (ptr, 0, len * sizeof (int)) ;
return 0 ;
} ;
if (! psf->read_int)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->read_int (psf, ptr, len) ;
if (psf->current + count / psf->sf.channels > psf->sf.samples)
{ count = (psf->sf.samples - psf->current) * psf->sf.channels ;
extra = len - count ;
memset (ptr + count, 0, extra * sizeof (int)) ;
psf->current = psf->sf.samples ;
} ;
psf->current += count / psf->sf.channels ;
return count ;
} /* sf_read_int */
size_t sf_readf_int (SNDFILE *sndfile, int *ptr, size_t frames)
{ SF_PRIVATE *psf ;
size_t count, extra ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_READ)
return SFE_NOT_READMODE ;
if (psf->current >= psf->sf.samples)
{ memset (ptr, 0, frames * psf->sf.channels * sizeof (int)) ;
return 0 ;
} ;
if (! psf->read_int)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->read_int (psf, ptr, frames * psf->sf.channels) ;
if (psf->current + count / psf->sf.channels > psf->sf.samples)
{ count = (psf->sf.samples - psf->current) * psf->sf.channels ;
extra = frames * psf->sf.channels - count ;
memset (ptr + count, 0, extra * sizeof (int)) ;
psf->current = psf->sf.samples ;
} ;
psf->current += count / psf->sf.channels ;
return count / psf->sf.channels ;
} /* sf_readf_int */
/*------------------------------------------------------------------------------
*/
size_t sf_read_double (SNDFILE *sndfile, double *ptr, size_t len, int normalize)
{ SF_PRIVATE *psf ;
size_t count, extra ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf) ;
if (psf->mode != SF_MODE_READ)
return SFE_NOT_READMODE ;
if (len % psf->sf.channels)
return (psf->error = SFE_BAD_READ_ALIGN) ;
if (psf->current >= psf->sf.samples)
{ memset (ptr, 0, len * sizeof (double)) ;
return 0 ;
} ;
if (! psf->read_double)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->read_double (psf, ptr, len, normalize) ;
if (psf->current + count / psf->sf.channels > psf->sf.samples)
{ count = (psf->sf.samples - psf->current) * psf->sf.channels ;
extra = len - count ;
memset (ptr + count, 0, extra * sizeof (double)) ;
psf->current = psf->sf.samples ;
} ;
psf->current += count / psf->sf.channels ;
return count ;
} /* sf_read_double */
size_t sf_readf_double (SNDFILE *sndfile, double *ptr, size_t frames, int normalize)
{ SF_PRIVATE *psf ;
size_t count, extra ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile, psf) ;
if (psf->mode != SF_MODE_READ)
return SFE_NOT_READMODE ;
if (psf->current >= psf->sf.samples)
{ memset (ptr, 0, frames * psf->sf.channels * sizeof (double)) ;
return 0 ;
} ;
if (! psf->read_double)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->read_double (psf, ptr, frames * psf->sf.channels, normalize) ;
if (psf->current + count / psf->sf.channels > psf->sf.samples)
{ count = (psf->sf.samples - psf->current) * psf->sf.channels ;
extra = frames * psf->sf.channels - count ;
memset (ptr + count, 0, extra * sizeof (double)) ;
psf->current = psf->sf.samples ;
} ;
psf->current += count / psf->sf.channels ;
return count / psf->sf.channels ;
} /* sf_readf_double */
/*------------------------------------------------------------------------------
*/
size_t sf_write_raw (SNDFILE *sndfile, void *ptr, size_t len)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (len % (psf->sf.channels * psf->bytewidth))
{ psf->error = SFE_BAD_WRITE_ALIGN ;
return (size_t) -1 ;
} ;
count = fwrite (ptr, 1, len, psf->file) ;
psf->current += count / psf->blockwidth ;
return count ;
} /* sf_write_raw */
/*------------------------------------------------------------------------------
*/
size_t sf_write_short (SNDFILE *sndfile, short *ptr, size_t len)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (len % psf->sf.channels)
{ psf->error = SFE_BAD_WRITE_ALIGN ;
return (size_t) -1 ;
} ;
if (! psf->write_short)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->write_short (sndfile, ptr, len) ;
psf->current += count / psf->sf.channels ;
return count ;
} /* sf_write_short */
size_t sf_writef_short (SNDFILE *sndfile, short *ptr, size_t frames)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (! psf->write_short)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->write_short (sndfile, ptr, frames * psf->sf.channels) ;
psf->current += count / psf->sf.channels ;
return count / psf->sf.channels ;
} /* sf_writef_short */
/*------------------------------------------------------------------------------
*/
size_t sf_write_int (SNDFILE *sndfile, int *ptr, size_t len)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (len % psf->sf.channels)
{ psf->error = SFE_BAD_WRITE_ALIGN ;
return (size_t) -1 ;
} ;
if (! psf->write_int)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->write_int (sndfile, ptr, len) ;
psf->current += count / psf->sf.channels ;
return count ;
} /* sf_write_int */
size_t sf_writef_int (SNDFILE *sndfile, int *ptr, size_t frames)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (! psf->write_int)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->write_int (sndfile, ptr, frames * psf->sf.channels) ;
psf->current += count / psf->sf.channels ;
return count / psf->sf.channels ;
} /* sf_writef_int */
/*------------------------------------------------------------------------------
*/
size_t sf_write_double (SNDFILE *sndfile, double *ptr, size_t len, int normalize)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (len % psf->sf.channels)
{ psf->error = SFE_BAD_WRITE_ALIGN ;
return (size_t) -1 ;
} ;
if (! psf->write_double)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->write_double (sndfile, ptr, len, normalize) ;
psf->current += count / psf->sf.channels ;
return count ;
} /* sf_write_double */
size_t sf_writef_double (SNDFILE *sndfile, double *ptr, size_t frames, int normalize)
{ SF_PRIVATE *psf ;
size_t count ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->mode != SF_MODE_WRITE)
{ psf->error = SFE_NOT_WRITEMODE ;
return (size_t) -1 ;
} ;
if (! psf->write_double)
{ psf->error = SFE_UNIMPLEMENTED ;
return (size_t) -1 ;
} ;
count = psf->write_double (sndfile, ptr, frames * psf->sf.channels, normalize) ;
psf->current += count / psf->sf.channels ;
return count / psf->sf.channels ;
} /* sf_writef_double */
/*------------------------------------------------------------------------------
*/
int sf_close (SNDFILE *sndfile)
{ SF_PRIVATE *psf ;
int error ;
VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
if (psf->close)
error = psf->close (psf) ;
fclose (psf->file) ;
memset (psf, 0, sizeof (SF_PRIVATE)) ;
free (psf) ;
return 0 ;
} /* sf_close */
/*=========================================================================
** Private functions.
*/