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<hr><h1>libSndFileWrapper.H</h1><div class="fragment"><pre>00001 <span class="comment">/* Copyright 2001 Matt Flax <flatmax@ieee.org></span>
00002 <span class="comment"> This file is part of MFFM Time Scale Modification for Audio.</span>
00003 <span class="comment"></span>
00004 <span class="comment"> MFFM Time Scale Modification for Audio is free software; you can redistribute it and/or modify</span>
00005 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
00006 <span class="comment"> the Free Software Foundation; either version 2 of the License, or</span>
00007 <span class="comment"> (at your option) any later version.</span>
00008 <span class="comment"> </span>
00009 <span class="comment"> MFFM Time Scale Modification for Audio is distributed in the hope that it will be useful,</span>
00010 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
00011 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
00012 <span class="comment"> GNU General Public License for more details.</span>
00013 <span class="comment"> </span>
00014 <span class="comment"> A copy of the GPL license is available here :</span>
00015 <span class="comment"> http://www.gnu.org/licenses/licenses.html#GPL</span>
00016 <span class="comment"> http://www.gnu.org/licenses/gpl.html</span>
00017 <span class="comment"> */</span>
00018
00019 <span class="comment">/*</span>
00020 <span class="comment">Version 1.1</span>
00021 <span class="comment">*/</span>
00022
00023 <span class="preprocessor">#ifndef LIBSNDFILEWRAPPER_H_</span>
00024 <span class="preprocessor"></span><span class="preprocessor">#define LIBSNDFILEWRAPPER_H_</span>
00025 <span class="preprocessor"></span><span class="comment">/*</span>
00026 <span class="comment"> C++ Wrapper for the libsndfile library</span>
00027 <span class="comment"> http://www.zip.com.au/~erikd/libsndfile/</span>
00028 <span class="comment"> Author: Matt Flax <flatmax@ieee.org></span>
00029 <span class="comment">*/</span>
00030
00031 <span class="preprocessor">#include <sndfile.h></span>
00032 <span class="preprocessor">#include <string.h></span>
00033
00034 <span class="comment">/*#define DEBUG_LSFW*/</span>
00035 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00036 <span class="preprocessor"></span><span class="preprocessor">#include <iostream></span>
00037 <span class="preprocessor">#endif</span>
00038 <span class="preprocessor"></span><span class="comment"></span>
00039 <span class="comment">/** Opens a WAV file for writing, on failure returns NULL */</span>
00040 SNDFILE* openWavWrite(SF_INFO *sfInfo, <span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keywordtype">int</span> freq, <span class="keywordtype">int</span> channelCnt, <span class="keywordtype">int</span> bitCnt){
00041 printf(<span class="stringliteral">"libSndFileWrapper::openWavWrite : opening %s\n %dHz\t%d channel(s)\t%d bits per word\n"</span>, name, freq, channelCnt, bitCnt);
00042 sfInfo->samplerate=freq;
00043 sfInfo->channels=channelCnt;
00044 <span class="comment">/* sfInfo->pcmbitwidth=bitCnt; from version 0*/</span>
00045 <span class="keywordflow">switch</span> (bitCnt){
00046 <span class="keywordflow">case</span> 8:
00047 sfInfo->format=(SF_FORMAT_WAV | SF_FORMAT_PCM_S8);
00048 <span class="keywordflow">case</span> 16:
00049 sfInfo->format=(SF_FORMAT_WAV | SF_FORMAT_PCM_16);
00050 <span class="keywordflow">case</span> 24:
00051 sfInfo->format=(SF_FORMAT_WAV | SF_FORMAT_PCM_24);
00052 <span class="keywordflow">case</span> 32:
00053 sfInfo->format=(SF_FORMAT_WAV | SF_FORMAT_PCM_32);
00054 <span class="keywordflow">default</span>:
00055 sfInfo->format=(SF_FORMAT_WAV | SF_FORMAT_PCM_16);
00056 }
00057
00058 <span class="keywordflow">return</span> sf_open(name, SFM_WRITE, sfInfo);
00059 }
00060 <span class="comment"></span>
00061 <span class="comment">/** Opens an AIFF sound file for writing, on failure returns NULL */</span>
00062 SNDFILE* openAiffWrite(SF_INFO *sfInfo, <span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keywordtype">int</span> freq, <span class="keywordtype">int</span> channelCnt, <span class="keywordtype">int</span> bitCnt){
00063 printf(<span class="stringliteral">"libSndFileWrapper::openAiffWrite : opening %s\n %dHz\t%d channel(s)\t%d bits per word\n"</span>, name, freq, channelCnt, bitCnt);
00064 sfInfo->samplerate=freq;
00065 sfInfo->channels=channelCnt;
00066 <span class="keywordflow">switch</span> (bitCnt){
00067 <span class="keywordflow">case</span> 8:
00068 sfInfo->format=(SF_FORMAT_AIFF | SF_FORMAT_PCM_S8);
00069 <span class="keywordflow">case</span> 16:
00070 sfInfo->format=(SF_FORMAT_AIFF | SF_FORMAT_PCM_16);
00071 <span class="keywordflow">case</span> 24:
00072 sfInfo->format=(SF_FORMAT_AIFF | SF_FORMAT_PCM_24);
00073 <span class="keywordflow">case</span> 32:
00074 sfInfo->format=(SF_FORMAT_AIFF | SF_FORMAT_PCM_32);
00075 <span class="keywordflow">default</span>:
00076 sfInfo->format=(SF_FORMAT_AIFF | SF_FORMAT_PCM_16);
00077 }
00078 <span class="keywordflow">return</span> sf_open(name, SFM_WRITE, sfInfo);
00079 }
00080 <span class="comment"></span>
00081 <span class="comment">/**Closes a sound file*/</span>
00082 <span class="keywordtype">void</span> closeSndFile(SNDFILE* file){
00083 sf_close(file);
00084 }
00085 <span class="comment"></span>
00086 <span class="comment">/** writes N samples to file</span>
00087 <span class="comment"> returns number written */</span>
00088 <span class="keywordtype">int</span> writeNSndFile(SNDFILE *file, <span class="keywordtype">int</span> N, <span class="keywordtype">short</span> <span class="keywordtype">int</span> *output){
00089 <span class="keywordtype">int</span> written;
00090 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00091 <span class="preprocessor"></span> printf(<span class="stringliteral">"about to write : %d\n"</span>,N);
00092 <span class="preprocessor">#endif</span>
00093 <span class="preprocessor"></span> <span class="comment">/*sfInfo->samples+=N;*/</span>
00094 written=sf_write_short(file, output, N);
00095 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00096 <span class="preprocessor"></span> printf(<span class="stringliteral">"written : %d\n"</span>,written);
00097 <span class="preprocessor">#endif</span>
00098 <span class="preprocessor"></span> <span class="keywordflow">return</span> written;
00099 }
00100 <span class="comment"></span>
00101 <span class="comment">/** writes an entire wav file */</span>
00102 <span class="keywordtype">void</span> writeWav(<span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keywordtype">int</span> cnt, <span class="keywordtype">short</span> <span class="keywordtype">int</span> *output, <span class="keywordtype">int</span> freq, <span class="keywordtype">int</span> channelCnt, <span class="keywordtype">int</span> bitCnt){
00103 <span class="comment">/*Write out to file ...*/</span>
00104 <span class="keywordtype">int</span> written;
00105 SF_INFO sfInfo;
00106 memset(&sfInfo, 0, <span class="keyword">sizeof</span> (sfInfo)) ;
00107 SNDFILE *file=openWavWrite(&sfInfo, name, freq, channelCnt, bitCnt);
00108 <span class="keywordflow">if</span> (file==NULL){
00109 perror(<span class="stringliteral">"couldn't open output file\n"</span>);
00110 sf_perror(file);
00111 exit(-1);
00112 }
00113 sfInfo.frames=cnt;
00114 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00115 <span class="preprocessor"></span> printf(<span class="stringliteral">"about to write : %d\n"</span>,cnt);
00116 <span class="preprocessor">#endif</span>
00117 <span class="preprocessor"></span> written=sf_write_short(file, output, channelCnt*cnt);
00118 <span class="comment">/* printf("written : %d\n",written);*/</span>
00119 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00120 <span class="preprocessor"></span> printf(<span class="stringliteral">"written : %d\n"</span>,written);
00121 <span class="preprocessor">#endif</span>
00122 <span class="preprocessor"></span> closeSndFile(file);
00123 }
00124 <span class="comment"></span>
00125 <span class="comment">/** Read an entire WAV file, allocating the memory array returned.</span>
00126 <span class="comment"> You must de-allocate yourself.</span>
00127 <span class="comment">*/</span>
00128 <span class="keywordtype">short</span> <span class="keywordtype">int</span>* readWav(<span class="keyword">const</span> <span class="keywordtype">char</span> *name, <span class="keywordtype">int</span> *cnt, <span class="keywordtype">int</span> *freq, <span class="keywordtype">int</span> *channels){
00129 <span class="comment">/*Read from file ...*/</span>
00130 <span class="keywordtype">short</span> <span class="keywordtype">int</span> *input;
00131 <span class="keywordtype">int</span> readn;
00132 SF_INFO sfinfo;
00133 sfinfo.format=0;
00134 SNDFILE *file=sf_open(name, SFM_READ,&sfinfo);
00135 <span class="keywordflow">if</span> (file==NULL){
00136 perror(<span class="stringliteral">"couldn't open input file\n"</span>);
00137 sf_perror(file);
00138 exit(-1);
00139 }
00140
00141 *cnt=sfinfo.frames;
00142 *freq=sfinfo.samplerate;
00143 *channels=sfinfo.channels;
00144
00145 input=(<span class="keywordtype">short</span> <span class="keywordtype">int</span> *)malloc(<span class="keyword">sizeof</span>(<span class="keywordtype">short</span> <span class="keywordtype">int</span>)*(*cnt)*(*channels));
00146 <span class="keywordflow">if</span> (!input){
00147 perror(<span class="stringliteral">"readWav:: input malloc error - out of memory ?"</span>);
00148 printf(<span class="stringliteral">"\t requested %d bytes"</span>,<span class="keyword">sizeof</span>(<span class="keywordtype">short</span> <span class="keywordtype">int</span>)*(*cnt)*(*channels));
00149 exit(-1);
00150 }
00151
00152 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00153 <span class="preprocessor"></span> printf(<span class="stringliteral">"about to read : %d\n"</span>,*cnt);
00154 <span class="preprocessor">#endif</span>
00155 <span class="preprocessor"></span> readn=sf_read_short(file, input, (*cnt)*(*channels)) ;
00156 <span class="preprocessor">#ifdef DEBUG_LSFW</span>
00157 <span class="preprocessor"></span> printf(<span class="stringliteral">"read : %d\n"</span>,readn);
00158 <span class="preprocessor">#endif</span>
00159 <span class="preprocessor"></span> closeSndFile(file);
00160 <span class="keywordflow">return</span> input;
00161 }
00162 <span class="preprocessor">#endif </span><span class="comment">/*LIBSNDFILEWRAPPER_H_*/</span>
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