common/SC_SndFileHelpers.hpp

   1 //  sndfile helper functions
   2 //
   3 //  Copyright (c) 2002 James McCartney. All rights reserved.
   4 //  Copyright (C) 2012 Tim Blechmann
   5 //
   6 //  This program is free software; you can redistribute it and/or modify
   7 //  it under the terms of the GNU General Public License as published by
   8 //  the Free Software Foundation; either version 2 of the License, or
   9 //  (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; see the file COPYING.  If not, write to
  18 //  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 //  Boston, MA 02111-1307, USA.
  20
  21 #ifndef SC_SNDFILEHELPERS_HPP_INCLUDED
  22 #define SC_SNDFILEHELPERS_HPP_INCLUDED
  23
  24 #include "SC_Errors.h"
  25
  26 #ifndef NO_LIBSNDFILE
  27 #include "sndfile.h"
  28 #include "string.h"
  29
  30 static inline int headerFormatFromString(const char *name)
  31 {
  32         if (!name) return SF_FORMAT_AIFF;
  33         if (strcasecmp(name, "AIFF")==0) return SF_FORMAT_AIFF;
  34         if (strcasecmp(name, "AIFC")==0) return SF_FORMAT_AIFF;
  35         if (strcasecmp(name, "RIFF")==0) return SF_FORMAT_WAV;
  36         if (strcasecmp(name, "WAVEX")==0) return SF_FORMAT_WAVEX;
  37         if (strcasecmp(name, "WAVE")==0) return SF_FORMAT_WAV;
  38         if (strcasecmp(name, "WAV" )==0) return SF_FORMAT_WAV;
  39         if (strcasecmp(name, "Sun" )==0) return SF_FORMAT_AU;
  40         if (strcasecmp(name, "IRCAM")==0) return SF_FORMAT_IRCAM;
  41         if (strcasecmp(name, "NeXT")==0) return SF_FORMAT_AU;
  42         if (strcasecmp(name, "raw")==0) return SF_FORMAT_RAW;
  43         if (strcasecmp(name, "MAT4")==0) return SF_FORMAT_MAT4;
  44         if (strcasecmp(name, "MAT5")==0) return SF_FORMAT_MAT5;
  45         if (strcasecmp(name, "PAF")==0) return SF_FORMAT_PAF;
  46         if (strcasecmp(name, "SVX")==0) return SF_FORMAT_SVX;
  47         if (strcasecmp(name, "NIST")==0) return SF_FORMAT_NIST;
  48         if (strcasecmp(name, "VOC")==0) return SF_FORMAT_VOC;
  49         if (strcasecmp(name, "W64")==0) return SF_FORMAT_W64;
  50         if (strcasecmp(name, "PVF")==0) return SF_FORMAT_PVF;
  51         if (strcasecmp(name, "XI")==0) return SF_FORMAT_XI;
  52         if (strcasecmp(name, "HTK")==0) return SF_FORMAT_HTK;
  53         if (strcasecmp(name, "SDS")==0) return SF_FORMAT_SDS;
  54         if (strcasecmp(name, "AVR")==0) return SF_FORMAT_AVR;
  55         if (strcasecmp(name, "SD2")==0) return SF_FORMAT_SD2;
  56         if (strcasecmp(name, "FLAC")==0) return SF_FORMAT_FLAC;
  57         // TODO allow other platforms to know vorbis once libsndfile 1.0.18 is established
  58         #if defined(__APPLE__) || defined(_WIN32) || LIBSNDFILE_1018
  59         if (strcasecmp(name, "vorbis")==0) return SF_FORMAT_VORBIS;
  60         #endif
  61         if (strcasecmp(name, "CAF")==0) return SF_FORMAT_CAF;
  62         if (strcasecmp(name, "RF64")==0) return SF_FORMAT_RF64;
  63         return 0;
  64 }
  65
  66 static inline int sampleFormatFromString(const char* name)
  67 {
  68         if (!name) return SF_FORMAT_PCM_16;
  69
  70         size_t len = strlen(name);
  71         if (len < 1) return 0;
  72
  73         if (name[0] == 'u') {
  74                 if (len < 5) return 0;
  75                 if (name[4] == '8') return SF_FORMAT_PCM_U8; // uint8
  76                 return 0;
  77         } else if (name[0] == 'i') {
  78                 if (len < 4) return 0;
  79                 if (name[3] == '8') return SF_FORMAT_PCM_S8;      // int8
  80                 else if (name[3] == '1') return SF_FORMAT_PCM_16; // int16
  81                 else if (name[3] == '2') return SF_FORMAT_PCM_24; // int24
  82                 else if (name[3] == '3') return SF_FORMAT_PCM_32; // int32
  83         } else if (name[0] == 'f') {
  84                 return SF_FORMAT_FLOAT; // float
  85         } else if (name[0] == 'd') {
  86                 return SF_FORMAT_DOUBLE; // double
  87         } else if (name[0] == 'm' || name[0] == 'u') {
  88                 return SF_FORMAT_ULAW; // mulaw ulaw
  89         } else if (name[0] == 'a') {
  90                 return SF_FORMAT_ALAW; // alaw
  91         }
  92         return 0;
  93 }
  94
  95 static inline int sndfileFormatInfoFromStrings(struct SF_INFO *info, const char *headerFormatString, const char *sampleFormatString)
  96 {
  97         int headerFormat = headerFormatFromString(headerFormatString);
  98         if (!headerFormat) return kSCErr_Failed;
  99
 100         int sampleFormat = sampleFormatFromString(sampleFormatString);
 101         if (!sampleFormat) return kSCErr_Failed;
 102
 103         info->format = (unsigned int)(headerFormat | sampleFormat);
 104         return kSCErr_None;
 105 }
 106
 107 #else
 108
 109 static inline int sndfileFormatInfoFromStrings(struct SF_INFO *info, const char *headerFormatString, const char *sampleFormatString)
 110 {
 111         return kSCErr_Failed;
 112 }
 113
 114 #endif
 115
 116 #endif /* SC_SNDFILEHELPERS_HPP_INCLUDED */