/* (c) 2004 James Robson, http://www.arbingersys.com ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation; either version 2 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 General Public License for more details. ** ** You should have received a copy of the GNU 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. ** ** **************************** ** ** How to use: ** - libsndfile.dll must have already been compiled and be in this ** application's search path ** ** - You must edit this file to point to the file you want to convert. Set ** the following line of code (found in the Main() function further below) ** to the name of a .WAV file that exists on your system. ** 186: string sfn = "input.wav"; ** ** - From a command prompt type ** csc generate.cs ** ** - Run the resulting executable 'generate.exe' ** ** ** Note: You will obviously need the csc compiler and the .NET runtime. I think ** these are freely available for download from Microsoft's website ** (part of the .NET SDK?). */ using System; using System.Runtime.InteropServices; using sf_count_t = System.Int64; //alias; see SF_INFO struct #if PLATFORM_64 using size_t = System.UInt64; #else using size_t = System.UInt32; #endif class lsndf_example { //sound file formats public enum lsndf_frmts { SF_FORMAT_WAV = 0x010000, /* Microsoft WAV format (little endian). */ SF_FORMAT_AIFF = 0x020000, /* Apple/SGI AIFF format (big endian). */ SF_FORMAT_AU = 0x030000, /* Sun/NeXT AU format (big endian). */ SF_FORMAT_RAW = 0x040000, /* RAW PCM data. */ SF_FORMAT_PAF = 0x050000, /* Ensoniq PARIS file format. */ SF_FORMAT_SVX = 0x060000, /* Amiga IFF / SVX8 / SV16 format. */ SF_FORMAT_NIST = 0x070000, /* Sphere NIST format. */ SF_FORMAT_VOC = 0x080000, /* VOC files. */ SF_FORMAT_IRCAM = 0x0A0000, /* Berkeley/IRCAM/CARL */ SF_FORMAT_W64 = 0x0B0000, /* Sonic Foundry's 64 bit RIFF/WAV */ SF_FORMAT_MAT4 = 0x0C0000, /* Matlab (tm) V4.2 / GNU Octave 2.0 */ SF_FORMAT_MAT5 = 0x0D0000, /* Matlab (tm) V5.0 / GNU Octave 2.1 */ SF_FORMAT_PVF = 0x0E0000, /* Portable Voice Format */ SF_FORMAT_XI = 0x0F0000, /* Fasttracker 2 Extended Instrument */ SF_FORMAT_HTK = 0x100000, /* HMM Tool Kit format */ SF_FORMAT_SDS = 0x110000, /* Midi Sample Dump Standard */ /* Subtypes from here on. */ SF_FORMAT_PCM_S8 = 0x0001, /* Signed 8 bit data */ SF_FORMAT_PCM_16 = 0x0002, /* Signed 16 bit data */ SF_FORMAT_PCM_24 = 0x0003, /* Signed 24 bit data */ SF_FORMAT_PCM_32 = 0x0004, /* Signed 32 bit data */ SF_FORMAT_PCM_U8 = 0x0005, /* Unsigned 8 bit data (WAV and RAW only) */ SF_FORMAT_FLOAT = 0x0006, /* 32 bit float data */ SF_FORMAT_DOUBLE = 0x0007, /* 64 bit float data */ SF_FORMAT_ULAW = 0x0010, /* U-Law encoded. */ SF_FORMAT_ALAW = 0x0011, /* A-Law encoded. */ SF_FORMAT_IMA_ADPCM = 0x0012, /* IMA ADPCM. */ SF_FORMAT_MS_ADPCM = 0x0013, /* Microsoft ADPCM. */ SF_FORMAT_GSM610 = 0x0020, /* GSM 6.10 encoding. */ SF_FORMAT_VOX_ADPCM = 0x0021, /* OKI / Dialogix ADPCM */ SF_FORMAT_G721_32 = 0x0030, /* 32kbs G721 ADPCM encoding. */ SF_FORMAT_G723_24 = 0x0031, /* 24kbs G723 ADPCM encoding. */ SF_FORMAT_G723_40 = 0x0032, /* 40kbs G723 ADPCM encoding. */ SF_FORMAT_DWVW_12 = 0x0040, /* 12 bit Delta Width Variable Word encoding. */ SF_FORMAT_DWVW_16 = 0x0041, /* 16 bit Delta Width Variable Word encoding. */ SF_FORMAT_DWVW_24 = 0x0042, /* 24 bit Delta Width Variable Word encoding. */ SF_FORMAT_DWVW_N = 0x0043, /* N bit Delta Width Variable Word encoding. */ SF_FORMAT_DPCM_8 = 0x0050, /* 8 bit differential PCM (XI only) */ SF_FORMAT_DPCM_16 = 0x0051, /* 16 bit differential PCM (XI only) */ /* Endian-ness options. */ SF_ENDIAN_FILE = 0x00000000, /* Default file endian-ness. */ SF_ENDIAN_LITTLE = 0x10000000, /* Force little endian-ness. */ SF_ENDIAN_BIG = 0x20000000, /* Force big endian-ness. */ SF_ENDIAN_CPU = 0x30000000, /* Force CPU endian-ness. */ SF_FORMAT_SUBMASK = 0x0000FFFF, SF_FORMAT_TYPEMASK = 0x0FFF0000, SF_FORMAT_ENDMASK = 0x30000000 } //modes and other public enum lsndf_tf { /* True and false */ SF_FALSE = 0, SF_TRUE = 1, /* Modes for opening files. */ SFM_READ = 0x10, SFM_WRITE = 0x20, SFM_RDWR = 0x30 } //important SF_INFO structure [StructLayout(LayoutKind.Sequential)] public struct SF_INFO { public sf_count_t frames ; // Used to be called samples. Changed to avoid confusion. public int samplerate ; public int channels ; public int format ; public int sections ; public int seekable ; }; //function declarations //Note: Not all functions have been prototyped here. Only the ones necessary to // make this application work. The below code should give some clues as to // how to add the rest since they have a lot of parameter and return type // similarities. [DllImport("libsndfile.dll")] public static extern IntPtr sf_open ([MarshalAs(UnmanagedType.LPStr)] string path, int mode, ref SF_INFO sfinfo); [DllImport("libsndfile.dll")] static extern int sf_error (IntPtr sndfile); [DllImport("libsndfile.dll")] static extern IntPtr sf_strerror (IntPtr sndfile); [DllImport("libsndfile.dll")] static extern int sf_format_check (ref SF_INFO info); [DllImport("libsndfile.dll")] static extern sf_count_t sf_read_float (IntPtr sndfile, float[] ptr, sf_count_t items); [DllImport("libsndfile.dll")] static extern sf_count_t sf_write_float (IntPtr sndfile, float[] ptr, sf_count_t items); [DllImport("libsndfile.dll")] static extern int sf_close (IntPtr sndfile); public const sf_count_t BUFFER_LEN = 4096; //program entry static void Main( ) { //declarations SF_INFO sfinfo = new SF_INFO(); float[] buffer = new float[BUFFER_LEN]; sf_count_t rcnt; //set the input file string sfn = "input.wav"; //set to a file on YOUR system //string sfn = "noexist.wav"; //test with non-existent file //set the output file string ofn = "output.wav"; //read in sound file to convert IntPtr infile = sf_open (sfn, (int)lsndf_tf.SFM_READ, ref sfinfo); //exit if error was thrown if ( (int)infile == 0 ) { Console.WriteLine("Error opening " + sfn); Console.WriteLine("Error #" + sf_error(infile)); return; } //set the file type for the output file //uncomment one and only one of the statements below to change the output //file encoding. //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_WAV | lsndf_frmts.SF_FORMAT_PCM_U8); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_WAV | lsndf_frmts.SF_FORMAT_PCM_16); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_WAV | lsndf_frmts.SF_FORMAT_MS_ADPCM); sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_WAV | lsndf_frmts.SF_FORMAT_IMA_ADPCM); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_WAV | lsndf_frmts.SF_FORMAT_GSM610); /* Soundforge W64. */ //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_W64 | lsndf_frmts.SF_FORMAT_PCM_U8); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_W64 | lsndf_frmts.SF_FORMAT_PCM_16); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_W64 | lsndf_frmts.SF_FORMAT_MS_ADPCM); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_W64 | lsndf_frmts.SF_FORMAT_IMA_ADPCM); //sfinfo.format = (int)(lsndf_frmts.SF_FORMAT_W64 | lsndf_frmts.SF_FORMAT_GSM610); //check that SF_INFO is valid if ( sf_format_check(ref sfinfo) == 0 ) { Console.WriteLine("sf_format_check failed. Invalid encoding"); return; } //open output file IntPtr outfile = sf_open (ofn, (int)lsndf_tf.SFM_WRITE, ref sfinfo); //exit if error was thrown if ( (int)outfile == 0 ) { Console.WriteLine("Error opening " + ofn); Console.WriteLine("Error #" + sf_error(outfile)); return; } //infile -> outfile Console.Write(sfn + " -> " + ofn); while ( (rcnt = sf_read_float (infile, buffer, BUFFER_LEN)) > 0) { Console.Write("."); sf_write_float (outfile, buffer, BUFFER_LEN); } Console.WriteLine("done."); //close up shop sf_close(infile); sf_close(outfile); } //main() } //class lsndf_example {}