CLAM-Development
1.1
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00001 /* 00002 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG) 00003 * UNIVERSITAT POMPEU FABRA 00004 * 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this program; if not, write to the Free Software 00018 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00019 * 00020 */ 00021 00022 #if USE_SNDFILE != 1 00023 #error USE_SNDFILE was not set to 1 in your settings.cfg file, but you are including files that require this. Please fix your settings.cfg 00024 #endif 00025 00026 #include "PCMCodec.hxx" 00027 #include "AudioFileFormats.hxx" 00028 #include "AudioFile.hxx" 00029 #include "AudioFileHeader.hxx" 00030 #include "DataTypes.hxx" 00031 #include <sndfile.h> 00032 #include "PCMAudioStream.hxx" 00033 00034 namespace CLAM 00035 { 00036 00037 namespace AudioCodecs 00038 { 00039 PCMCodec::PCMCodec() 00040 { 00041 } 00042 00043 PCMCodec::~PCMCodec() 00044 { 00045 } 00046 00047 PCMCodec& PCMCodec::Instantiate() 00048 { 00049 static PCMCodec theInstance; 00050 00051 return theInstance; 00052 } 00053 00054 bool PCMCodec::IsReadable( std::string uri ) const 00055 { 00056 SNDFILE* fileHandle = NULL; 00057 SF_INFO fileHeaderInfo; 00058 // MRJ: Done as libsndfile doc says 00059 fileHeaderInfo.format = 0; 00060 00061 fileHandle = sf_open( uri.c_str(), SFM_READ, &fileHeaderInfo ); 00062 00063 if ( fileHandle != NULL ) 00064 { 00065 sf_close( fileHandle ); 00066 return true; 00067 } 00068 00069 // TODO: An exception should be thrown 00070 return false; 00071 00072 } 00073 00074 bool PCMCodec::IsWritable( std::string uri, const AudioFileHeader& header ) const 00075 { 00076 if ( !header.HasSampleRate() ) 00077 return false; 00078 if ( !header.HasChannels() ) 00079 return false; 00080 if ( !header.HasFormat() ) 00081 return false; 00082 if ( !header.HasEncoding() ) 00083 return false; 00084 if ( !header.HasEndianess() ) 00085 return false; 00086 00087 SF_INFO fileInfo; 00088 fileInfo.samplerate = (int)header.GetSampleRate(); 00089 fileInfo.channels = (int)header.GetChannels(); 00090 fileInfo.format = header.GetFormat() | header.GetEncoding() | header.GetEndianess(); 00091 00092 return sf_format_check( &fileInfo ) == 1; 00093 } 00094 00095 Stream* PCMCodec::GetStreamFor( const AudioFile& file ) 00096 { 00097 return new PCMAudioStream(file); 00098 } 00099 00100 void PCMCodec::RetrieveHeaderData( std::string uri, AudioFileHeader& hdr ) 00101 { 00102 SNDFILE* fileHandle = NULL; 00103 SF_INFO fileHeaderInfo; 00104 fileHeaderInfo.format = 0; 00105 00106 fileHandle = sf_open( uri.c_str(), SFM_READ, &fileHeaderInfo ); 00107 00108 if ( fileHandle != NULL ) 00109 { 00110 hdr.AddSampleRate(); 00111 hdr.AddSamples(); 00112 hdr.AddChannels(); 00113 hdr.AddFormat(); 00114 hdr.AddEncoding(); 00115 hdr.AddEndianess(); 00116 hdr.AddLength(); 00117 hdr.UpdateData(); 00118 00119 hdr.SetSampleRate( (TData)fileHeaderInfo.samplerate ); 00120 hdr.SetSamples( (TSize)fileHeaderInfo.frames ); 00121 hdr.SetChannels( (TSize)fileHeaderInfo.channels ); 00122 hdr.SetFormat( fileHeaderInfo.format & SF_FORMAT_TYPEMASK ); 00123 hdr.SetEncoding( fileHeaderInfo.format & SF_FORMAT_SUBMASK ); 00124 hdr.SetEndianess( fileHeaderInfo.format & SF_FORMAT_ENDMASK ); 00125 hdr.SetLength( TTime(fileHeaderInfo.frames) / hdr.GetSampleRate() ); 00126 hdr.SetLength( hdr.GetLength() * 1000. ); 00127 sf_close(fileHandle); 00128 } 00129 00130 } 00131 } 00132 00133 } 00134