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third_party_libsnd/Octave/sndfile.cc
Erik de Castro Lopo c9b79621ac Octave/sndfile.cc : Improve help strings.
2008-10-27 21:26:55 +11:00

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/*
** Copyright (C) 2007 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.
*/
#include <octave/oct.h>
#include "sndfile.h"
#define FOUR_GIG (0x100000000LL)
#define BUFFER_FRAMES 8192
static int format_of_str (const std::string & fmt) ;
static void string_of_format (std::string & fmt, int format) ;
DEFUN_DLD (sfversion, args, nargout ,
"-*- texinfo -*-\n\
@deftypefn {Loadable Function} {@var{version} =} sfversion ()\n\
@cindex Reading sound files\n\
Return a string containing the libsndfile version.\n\
@seealso{sfread, sfwrite}\n\
@end deftypefn")
{ char buffer [256] ;
octave_value_list retval ;
/* Bail out if the input parameters are bad. */
if (args.length () != 0 || nargout > 1)
{ print_usage () ;
return retval ;
} ;
sf_command (NULL, SFC_GET_LIB_VERSION, buffer, sizeof (buffer)) ;
std::string version (buffer) ;
retval.append (version) ;
return retval ;
} /* sfversion */
DEFUN_DLD (sfread, args, nargout ,
"-*- texinfo -*-\n\
@deftypefn {Loadable Function} {@var{data},@var{srate},@var{format} =} sfread (@var{filename})\n\
@cindex Reading sound files\n\
Read a sound file from disk using libsndfile.\n\
@seealso{sfversion, sfwrite}\n\
@end deftypefn")
{ SNDFILE * file ;
SF_INFO sfinfo ;
octave_value_list retval ;
int nargin = args.length () ;
/* Bail out if the input parameters are bad. */
if ((nargin != 1) || !args (0) .is_string () || nargout < 1 || nargout > 3)
{ print_usage () ;
return retval ;
} ;
memset (&sfinfo, 0, sizeof (sfinfo)) ;
std::string filename = args (0).string_value () ;
if ((file = sf_open (filename.c_str (), SFM_READ, &sfinfo)) == NULL)
{ error ("sfread: couldn't open file %s : %s", filename.c_str (), sf_strerror (NULL)) ;
return retval ;
} ;
if (sfinfo.frames > FOUR_GIG)
printf ("This is a really huge file (%lld frames).\nYou may run out of memory trying to load it.\n", (long long) sfinfo.frames) ;
dim_vector dim = dim_vector () ;
dim.resize (2) ;
dim (0) = sfinfo.frames ;
dim (1) = sfinfo.channels ;
/* Should I be using Matrix instead? */
NDArray out (dim, 0.0) ;
float buffer [BUFFER_FRAMES * sfinfo.channels] ;
int readcount ;
sf_count_t total = 0 ;
do
{ readcount = sf_readf_float (file, buffer, BUFFER_FRAMES) ;
/* Make sure we don't read more frames than we allocated. */
if (total + readcount > sfinfo.frames)
readcount = sfinfo.frames - total ;
for (int ch = 0 ; ch < sfinfo.channels ; ch++)
{ for (int k = 0 ; k < readcount ; k++)
out (total + k, ch) = buffer [k * sfinfo.channels + ch] ;
} ;
total += readcount ;
} while (readcount > 0 && total < sfinfo.frames) ;
retval.append (out.squeeze ()) ;
if (nargout >= 2)
retval.append ((octave_uint32) sfinfo.samplerate) ;
if (nargout >= 3)
{ std::string fmt ("") ;
string_of_format (fmt, sfinfo.format) ;
retval.append (fmt) ;
} ;
/* Clean up. */
sf_close (file) ;
return retval ;
} /* sfread */
DEFUN_DLD (sfwrite, args, nargout ,
"-*- texinfo -*-\n\
@deftypefn {Function File} sfwrite (@var{filename},@var{data},@var{srate},@var{format})\n\
Write a sound file to disk using libsndfile.\n\
@seealso{sfread, sfversion}\n\
@end deftypefn\n\
")
{ SNDFILE * file ;
SF_INFO sfinfo ;
octave_value_list retval ;
int nargin = args.length () ;
/* Bail out if the input parameters are bad. */
if (nargin != 4 || !args (0).is_string () || !args (1).is_real_matrix ()
|| !args (2).is_real_scalar () || !args (3).is_string ()
|| nargout != 0)
{ print_usage () ;
return retval ;
} ;
std::string filename = args (0).string_value () ;
std::string format = args (3).string_value () ;
memset (&sfinfo, 0, sizeof (sfinfo)) ;
sfinfo.format = format_of_str (format) ;
if (sfinfo.format == 0)
{ error ("Bad format '%s'", format.c_str ()) ;
return retval ;
} ;
sfinfo.samplerate = lrint (args (2).scalar_value ()) ;
if (sfinfo.samplerate < 1)
{ error ("Bad sample rate : %d.\n", sfinfo.samplerate) ;
return retval ;
} ;
Matrix data = args (1).matrix_value () ;
long rows = args (1).rows () ;
long cols = args (1).columns () ;
if (cols > rows)
{ error ("Audio data should have one column per channel, but supplied data "
"has %ld rows and %ld columns.\n", rows, cols) ;
return retval ;
} ;
sfinfo.channels = cols ;
if ((file = sf_open (filename.c_str (), SFM_WRITE, &sfinfo)) == NULL)
{ error ("Couldn't open file %s : %s", filename.c_str (), sf_strerror (NULL)) ;
return retval ;
} ;
float buffer [BUFFER_FRAMES * sfinfo.channels] ;
int writecount ;
long total = 0 ;
do
{
writecount = BUFFER_FRAMES ;
/* Make sure we don't read more frames than we allocated. */
if (total + writecount > rows)
writecount = rows - total ;
for (int ch = 0 ; ch < sfinfo.channels ; ch++)
{ for (int k = 0 ; k < writecount ; k++)
buffer [k * sfinfo.channels + ch] = data (total + k, ch) ;
} ;
if (writecount > 0)
sf_writef_float (file, buffer, writecount) ;
total += writecount ;
} while (writecount > 0 && total < rows) ;
/* Clean up. */
sf_close (file) ;
return retval ;
} /* sfwrite */
static void
str_split (const std::string & str, const std::string & delim, std::vector <std::string> & output)
{
unsigned int offset = 0 ;
size_t delim_index = 0 ;
delim_index = str.find (delim, offset) ;
while (delim_index != std::string::npos)
{
output.push_back (str.substr(offset, delim_index - offset)) ;
offset += delim_index - offset + delim.length () ;
delim_index = str.find (delim, offset) ;
}
output.push_back (str.substr (offset)) ;
} /* str_split */
static int
hash_of_str (const std::string & str)
{
int hash = 0 ;
for (unsigned k = 0 ; k < str.length () ; k++)
hash = (hash * 3) + tolower (str [k]) ;
return hash ;
} /* hash_of_str */
static int
major_format_of_hash (const std::string & str)
{ int hash ;
hash = hash_of_str (str) ;
switch (hash)
{
case 0x5c8 : /* 'wav' */ return SF_FORMAT_WAV ;
case 0xf84 : /* 'aiff' */ return SF_FORMAT_AIFF ;
case 0x198 : /* 'au' */ return SF_FORMAT_AU ;
case 0x579 : /* 'paf' */ return SF_FORMAT_PAF ;
case 0x5e5 : /* 'svx' */ return SF_FORMAT_SVX ;
case 0x1118 : /* 'nist' */ return SF_FORMAT_NIST ;
case 0x5d6 : /* 'voc' */ return SF_FORMAT_VOC ;
case 0x324a : /* 'ircam' */ return SF_FORMAT_IRCAM ;
case 0x505 : /* 'w64' */ return SF_FORMAT_W64 ;
case 0x1078 : /* 'mat4' */ return SF_FORMAT_MAT4 ;
case 0x1079 : /* 'mat5' */ return SF_FORMAT_MAT5 ;
case 0x5b8 : /* 'pvf' */ return SF_FORMAT_PVF ;
case 0x1d1 : /* 'xi' */ return SF_FORMAT_XI ;
case 0x56f : /* 'htk' */ return SF_FORMAT_HTK ;
case 0x5aa : /* 'sds' */ return SF_FORMAT_SDS ;
case 0x53d : /* 'avr' */ return SF_FORMAT_AVR ;
case 0x11d0 : /* 'wavx' */ return SF_FORMAT_WAVEX ;
case 0x569 : /* 'sd2' */ return SF_FORMAT_SD2 ;
case 0x1014 : /* 'flac' */ return SF_FORMAT_FLAC ;
case 0x504 : /* 'caf' */ return SF_FORMAT_CAF ;
case 0x5f6 : /* 'wve' */ return SF_FORMAT_WVE ;
default : break ;
} ;
printf ("%s : hash '%s' -> 0x%x\n", __func__, str.c_str (), hash) ;
return 0 ;
} /* major_format_of_hash */
static int
minor_format_of_hash (const std::string & str)
{ int hash ;
hash = hash_of_str (str) ;
switch (hash)
{
case 0x1085 : /* 'int8' */ return SF_FORMAT_PCM_S8 ;
case 0x358a : /* 'uint8' */ return SF_FORMAT_PCM_U8 ;
case 0x31b0 : /* 'int16' */ return SF_FORMAT_PCM_16 ;
case 0x31b1 : /* 'int24' */ return SF_FORMAT_PCM_24 ;
case 0x31b2 : /* 'int32' */ return SF_FORMAT_PCM_32 ;
case 0x3128 : /* 'float' */ return SF_FORMAT_FLOAT ;
case 0x937d : /* 'double' */ return SF_FORMAT_DOUBLE ;
case 0x11bd : /* 'ulaw' */ return SF_FORMAT_ULAW ;
case 0xfa1 : /* 'alaw' */ return SF_FORMAT_ALAW ;
case 0xfc361 : /* 'ima_adpcm' */ return SF_FORMAT_IMA_ADPCM ;
case 0x5739a : /* 'ms_adpcm' */ return SF_FORMAT_MS_ADPCM ;
case 0x9450 : /* 'gsm610' */ return SF_FORMAT_GSM610 ;
case 0x172a3 : /* 'g721_32' */ return SF_FORMAT_G721_32 ;
case 0x172d8 : /* 'g723_24' */ return SF_FORMAT_G723_24 ;
case 0x172da : /* 'g723_40' */ return SF_FORMAT_G723_40 ;
default : break ;
} ;
printf ("%s : hash '%s' -> 0x%x\n", __func__, str.c_str (), hash) ;
return 0 ;
} /* minor_format_of_hash */
static const char *
string_of_major_format (int format)
{
switch (format & SF_FORMAT_TYPEMASK)
{
case SF_FORMAT_WAV : return "wav" ;
case SF_FORMAT_AIFF : return "aiff" ;
case SF_FORMAT_AU : return "au" ;
case SF_FORMAT_PAF : return "paf" ;
case SF_FORMAT_SVX : return "svx" ;
case SF_FORMAT_NIST : return "nist" ;
case SF_FORMAT_VOC : return "voc" ;
case SF_FORMAT_IRCAM : return "ircam" ;
case SF_FORMAT_W64 : return "w64" ;
case SF_FORMAT_MAT4 : return "mat4" ;
case SF_FORMAT_MAT5 : return "mat5" ;
case SF_FORMAT_PVF : return "pvf" ;
case SF_FORMAT_XI : return "xi" ;
case SF_FORMAT_HTK : return "htk" ;
case SF_FORMAT_SDS : return "sds" ;
case SF_FORMAT_AVR : return "avr" ;
case SF_FORMAT_WAVEX : return "wavx" ;
case SF_FORMAT_SD2 : return "sd2" ;
case SF_FORMAT_FLAC : return "flac" ;
case SF_FORMAT_CAF : return "caf" ;
case SF_FORMAT_WVE : return "wfe" ;
default : break ;
} ;
return "unknown" ;
} /* string_of_major_format */
static const char *
string_of_minor_format (int format)
{
switch (format & SF_FORMAT_SUBMASK)
{
case SF_FORMAT_PCM_S8 : return "int8" ;
case SF_FORMAT_PCM_U8 : return "uint8" ;
case SF_FORMAT_PCM_16 : return "int16" ;
case SF_FORMAT_PCM_24 : return "int24" ;
case SF_FORMAT_PCM_32 : return "int32" ;
case SF_FORMAT_FLOAT : return "float" ;
case SF_FORMAT_DOUBLE : return "double" ;
case SF_FORMAT_ULAW : return "ulaw" ;
case SF_FORMAT_ALAW : return "alaw" ;
case SF_FORMAT_IMA_ADPCM : return "ima_adpcm" ;
case SF_FORMAT_MS_ADPCM : return "ms_adpcm" ;
case SF_FORMAT_GSM610 : return "gsm610" ;
case SF_FORMAT_G721_32 : return "g721_32" ;
case SF_FORMAT_G723_24 : return "g723_24" ;
case SF_FORMAT_G723_40 : return "g723_40" ;
default : break ;
} ;
return "unknown" ;
} /* string_of_minor_format */
static int
format_of_str (const std::string & fmt)
{
std::vector <std::string> split ;
str_split (fmt, "-", split) ;
if (split.size () != 2)
return 0 ;
int major_fmt = major_format_of_hash (split.at (0)) ;
if (major_fmt == 0)
return 0 ;
int minor_fmt = minor_format_of_hash (split.at (1)) ;
if (minor_fmt == 0)
return 0 ;
return major_fmt | minor_fmt ;
} /* format_of_str */
static void
string_of_format (std::string & fmt, int format)
{
char buffer [64] ;
snprintf (buffer, sizeof (buffer), "%s-%s", string_of_major_format (format), string_of_minor_format (format)) ;
fmt = buffer ;
return ;
} /* string_of_format */
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