sndfile.c
上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:33k
- /*
- ** 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 && (sfinfo->format & SF_FORMAT_SUBMASK != SF_FORCE_OPEN) ) //or
- return 0 ;
- if (! sfinfo->channels)
- return 0 ;
- if (! sfinfo->pcmbitwidth && (sfinfo->format & SF_FORMAT_SUBMASK != SF_FORCE_OPEN) ) //or
- 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 && (psf->sf.format & SF_FORMAT_SUBMASK != SF_FORCE_OPEN) ) //or
- return 0 ;
- if (! psf->bytewidth && (psf->sf.format & SF_FORMAT_SUBMASK != SF_FORCE_OPEN) ) //or
- 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, "%sn", path) ;
- if (seekable)
- { fseek (psf->file, 0, SEEK_END) ;
- psf->filelength = ftell (psf->file) ;
- fseek (psf->file, 0, SEEK_SET) ;
- psf_sprintf (psf, "size : %dn", psf->filelength) ;
- }
- else
- psf->filelength = 2048 ;
-
- copy_filename (psf, path) ;
-
- filetype = guess_file_type (psf->file, psf->filename) ;
- fseek (psf->file, 0, SEEK_SET) ;
-
- //or
- memcpy (&(psf->sf), sfinfo, sizeof (SF_INFO)) ;
- // end or
- 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 ("%sn", 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_set_bytewidth(SNDFILE *sndfile, SF_INFO* sfinfo)
- {
- SF_PRIVATE *psf ;
- VALIDATE_SNDFILE_AND_ASSIGN_PSF (sndfile,psf) ;
- psf->sf.pcmbitwidth=sfinfo->pcmbitwidth;
- psf->sf.bytewidth=sfinfo->bytewidth;
- psf->bytewidth=sfinfo->bytewidth;
- psf->blockwidth = psf->sf.channels * psf->bytewidth ;
- if ( psf->blockwidth)
- psf->sf.samples = psf->datalength / psf->blockwidth ;
- sfinfo->samples=psf->sf.samples;
- return 0;
- }
- /*------------------------------------------------------------------------------
- */
- 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 ;
- int force_open; //or
- /* 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 ;
-
- //or
- force_open = ((info->format & SF_FORMAT_SUBMASK) == SF_FORCE_OPEN)?1:0;
- if(force_open && info->format_tag && info->bytewidth)
- return 1;
- //end or
-
- 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_ULAW || subformat == SF_FORMAT_ALAW)
- return 1 ;
- 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.
- */