/* 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. */ /* This program reads a wavefile and prints out some sourcecode containing an initialized array of nSamples sampledata normalized to [-1.0 .. 1.0] floats. Use this program to embed sampledata in your program (C, Pascal) Needs libsndfile (http://www.mega-nerd.com/libsndfile) Source written with a little help of the libsndfile examples Rudolf Lindner, rlma-labs.de, 2005 */ // compilation: gcc -I libsndfile wave2src.c libsndfile/libsndfile.lib -o wave2src.exe #include #include #include // put libsoundfile's sndfile.h in your include path #include // input buffer length #define BUFFER_LEN 1024 // restrict to 9 channels (1 digit) #define MAX_CHANNELS 9 enum eLang { PAS = 0, // Pascal/Delphi C // C, C++ }; void usage () { printf ( "\ usage: wave2src [-llang] [-cchannel] wavefile [outfile]\n\ wave2src -i wavefile\n\ \n\ Read wavefiles and generate sourceode. samples are put into an initialized\n\ float array normalized to [-1.0 .. 1.0].\n\ Use this program to embed audio data in your sourcecode.\n\ Rudolf Lindner, 2005, rlma-labs.de, uses libsndfile\n\ \n\ Flags:\n\ -l: lang:\n\ p: Pascal\n\ c: C (default)\n\ -c: channel\n\ (digit): channel number: extract this channel only\n\ m: mono: Mix all channels into one mono channel\n\ -i: print info on wavefile and exit. Useful to retreive number of channels\n\ \n\ Examples:\n\ - print info on ding.wav:\n\ wave2src -i ding.wav\n\ - mix all channels of AcidTrax.wav into mono channel and create .c file:\n\ wave2src -lc -cm AcidTrax.wav AcidTrax.c\n\ - only use channel 2 (stereo right) of previous example:\n\ wave2src -lc -c2 AcidTrax.wav AcidTrax.c\n\ \n"); } int main ( int argc, char *argv[] ) { // read buffer static float data [BUFFER_LEN]; SNDFILE *infile; FILE *fileout; SF_INFO sfinfo; int readcount; const char *inFile = "input.wav"; const char *outFile = "output.txt"; // commandline options enum eLang opt_lang = C; int flagPrintInfo = 0; int flagMono = 1; int argChannel = 1; int haveOutFile = 0; // scan commandline arguments int a; for ( a = 1; a < argc; a++ ) { if ( *argv[a] != '-' ) break; // first non flag argument if ( strncmp ( argv[a], "-i", strlen ("-i") ) == 0 ) { flagPrintInfo = 1; a++; break; } else if ( strncmp ( argv[a], "-l", strlen ("-l") ) == 0 ) { if ( strncmp ( argv[a]+2, "p", 1 ) == 0 ) { opt_lang = PAS; } else if ( strncmp ( argv[a]+2, "c", 1 ) == 0 ) { opt_lang = C; } else { printf ( "unsupported Language: %s\n", argv[a]); usage (); return 1; } } else if ( strncmp ( argv[a], "-c", strlen ("-c") ) == 0 ) { if ( strncmp ( argv[a]+2, "m", 1 ) == 0 ) { flagMono = 1; } else { flagMono = 0; char cDigit = *(argv[a]+2); if ( isdigit(cDigit) ) { argChannel = cDigit - '0'; } else { printf ( "wrong channel: %s\n", argv[a]); usage (); return 1; } if ( argChannel > MAX_CHANNELS ) { printf ( "only %d channels supported\n", MAX_CHANNELS ); return 1; } } } } // wavefile argument if ( a < argc ) { inFile = argv[a]; } else { printf ( "missing inputfile\n" ); usage (); return 1; } // output file argument (optional) a++; if ( a < argc ) { outFile = argv[a]; haveOutFile = 1; } /* Here's where we open the input file. We pass sf_open the file name and ** a pointer to an SF_INFO struct. ** On successful open, sf_open returns a SNDFILE* pointer which is used ** for all subsequent operations on that file. ** If an error occurs during sf_open, the function returns a NULL pointer. ** ** If you are trying to open a raw headerless file you will need to set the ** format and channels fields of sfinfo before calling sf_open(). For ** instance to open a raw 16 bit stereo PCM file you would need the following ** two lines: ** ** sfinfo.format = SF_FORMAT_RAW | SF_FORMAT_PCM_16; ** sfinfo.channels = 2; */ if ( ! (infile = sf_open (inFile, SFM_READ, &sfinfo)) ) { printf ("Not able to open input file %s.\n", inFile); /* Print the error message from libsndfile. */ puts (sf_strerror (NULL)); return 1; } if ( flagPrintInfo ) { printf ( "Sample Rate : %d\n", sfinfo.samplerate ); if ( sfinfo.frames > 0x7FFFFFFF) printf ("Frames : unknown\n"); else printf ("Frames : %ld\n", (long) sfinfo.frames); printf ( "Channels : %d\n", sfinfo.channels); printf ( "Format : 0x%08X\n", sfinfo.format); printf ( "Sections : %d\n", sfinfo.sections); printf ( "Seekable : %s\n", (sfinfo.seekable ? "TRUE" : "FALSE")); sf_close ( infile ); return 0; } if ( sfinfo.channels > MAX_CHANNELS) { printf ("Not able to process more than %d channels\n", MAX_CHANNELS); sf_close ( infile ); return 1; } if ( argChannel > sfinfo.channels ) { printf ( "wavefile only has %d channels\n", sfinfo.channels ); sf_close ( infile ); return 1; } if ( haveOutFile ) { fileout = fopen ( outFile, "w" ); if (fileout == NULL ) { printf ("Not able to open output file %s.\n", outFile); sf_close ( infile ); return 1; } } else { fileout = stdout; } // print file header char *headerText = "sampledata created by wave2src, Rudolf Lindner, 2005, rlma-labs.de"; switch ( opt_lang ) { case PAS: fprintf ( fileout, "/*%s*/\n\n", headerText); fprintf ( fileout, "VAR samples : ARRAY[1..%d] OF FLOAT;\n\n", sfinfo.frames ); break; case C: fprintf ( fileout, "//%s\n\n", headerText); fprintf ( fileout, "float samples[%d] = {\n", sfinfo.frames ); break; } // print samples int bytenum = 0; int i; while ( (readcount = sf_read_float (infile, data, BUFFER_LEN)) ) { for ( i = 0; i < readcount; ) { float sample; if ( flagMono ) { // mixdown channels to mono int c; for ( sample = 0, c = 0; c < sfinfo.channels; c++ ) { sample += data[i]; i++; } sample = sample / sfinfo.channels; // normalize back } else { // get channel data sample = data [i+argChannel-1]; i += sfinfo.channels; } switch ( opt_lang ) { case PAS: fprintf ( fileout, "samples [%d] := %.8f;\n", bytenum+1, sample); break; case C: fprintf ( fileout, "%.8f", sample); if ( bytenum+1 < sfinfo.frames ) fprintf ( fileout, ",\n"); break; } bytenum++; } } // print footer switch ( opt_lang ) { case PAS: break; case C: fprintf ( fileout, " };\n" ); break; } /* Close input and output files. */ sf_close (infile); fclose (fileout); return 0; } /* main */