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//
// SIDPLAY to .WAV/.AU
// Copyright (C) Michael Schwendt and Adam Lorentzon.
// Some /u-law specific code 'borrowed' from tracker 4.43 by Marc Espie.
//
// 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
//
#include <iostream>
#include <iomanip>
#include <iostream>
#include <string.h>
#include <stdlib.h>
#ifdef __MSDOS__
#include <dir.h>
#endif
#include <time.h>
#if defined(__amigaos__)
#define EXIT_ERROR_STATUS (20)
#else
#define EXIT_ERROR_STATUS (-1)
#endif
#include <sidplay/player.h>
#include <sidplay/fformat.h>
#include <sidplay/myendian.h>
using namespace std;
const char s2w_version[] = "1.8";
struct wav_hdr // little endian
{
char main_chunk[4]; // 'RIFF'
udword length; // filelength
char chunk_type[4]; // 'WAVE'
char sub_chunk[4]; // 'fmt '
udword clength; // length of sub_chunk, always 16 bytes
uword format; // currently always = 1 = PCM-Code
uword modus; // 1 = mono, 2 = stereo
udword samplefreq; // sample-frequency
udword bytespersec; // frequency * bytespersmpl
uword bytespersmpl; // bytes per sample; 1 = 8-bit, 2 = 16-bit
uword bitspersmpl;
char data_chunk[4]; // keyword, begin of data chunk; = 'data'
udword data_length; // length of data
};
struct au_hdr // big endian
{
char id[4]; // '.snd'
udword hdrlength; // const 0x18
udword length; // data length
udword format; // 1=ulaw
udword frequency;
udword channels; // 1=mono, 2=stereo
// Cool Edit v1.50 saves au files with a header that contains an extra
// 4 byte field at the end. It has been filled with zeros in the
// cases I've come across. This makes hdrlength 0x1C.
};
// Default WAV header: PCM, mono, 44100 Hz, 8-bit
#if defined(SID_WORDS_LITTLEENDIAN)
wav_hdr my_wav_hdr =
{
{'R','I','F','F'}, 0, {'W','A','V','E'},
{'f','m','t',' '}, 16, 1, 1, 22050, 22050, 1, 8,
{'d','a','t','a'}, 0
};
#else
wav_hdr my_wav_hdr =
{
{'R','I','F','F'}, 0, {'W','A','V','E'},
{'f','m','t',' '},
convertEndianess ((udword)16),
convertEndianess ((uword)1),
convertEndianess ((uword)1),
convertEndianess ((udword)22050),
convertEndianess ((udword)22050),
convertEndianess ((uword)1),
convertEndianess ((uword)8),
{'d','a','t','a'}, 0
};
#endif
#if defined(SID_WORDS_LITTLEENDIAN)
au_hdr my_au_hdr =
{
{'.','s','n','d'},
convertEndianess ((udword)0x18),
0,
convertEndianess ((udword)1),
convertEndianess ((udword)8000), // 8000bytes = 0x1F40, 8012=0x1F4C
convertEndianess ((udword)1)
};
#else
au_hdr my_au_hdr =
{
{'.','s','n','d'}, 0x18, 0, 1, 8000, 1
};
#endif
struct FadeParam
{
int seconds;
int step;
int count;
int currentLevel;
void (*buffer)(ubyte*,udword);
} fadeIn, fadeOut;
const int fadeLevel = 128;
void fadeOut_buffer_8( ubyte*, udword );
void fadeIn_buffer_8( ubyte*, udword );
void fadeOut_buffer_16( ubyte*, udword );
void fadeIn_buffer_16( ubyte*, udword );
void buffer2ulaw( ubyte* sampleBuffer, udword sampleBufferSize );
void endianswitch_buffer( ubyte* sampleBuffer, udword sampleBufferSize );
enum
{
TXT_TITLE,
ERR_NOT_ENOUGH_MEMORY,
ERR_SYNTAX, ERR_ENGINE,
ERR_ENDIANESS
};
void error( char*, char* );
void printtext( int );
int main(int argc, char *argv[])
{
// ======================================================================
// INITIALIZE THE EMULATOR ENGINE
// ======================================================================
// Initialize the SID-Emulator Engine to defaults.
emuEngine myEmuEngine;
// Everything went okay ?
if ( !myEmuEngine )
{
// So far the only possible error.
printtext(ERR_NOT_ENOUGH_MEMORY);
}
if ( !myEmuEngine.verifyEndianess() )
{
printtext(ERR_ENDIANESS);
}
struct emuConfig myEmuConfig;
myEmuEngine.getConfig(myEmuConfig);
// ---
cout << "SID2WAV Synthetic Waveform Generator " << "Portable Version " << s2w_version << "/" << myEmuEngine.getVersionString() << endl
<< "Copyright (c) 1994-97 All rights reserved." << endl
<< "Authors: Michael Schwendt <sidplay@geocities.com>" << endl
<< " Adam Lorentzon <d93-alo@nada.kth.se>" << endl
#if defined(__amigaos__)
<< "Ported to AmigaOS: <phillwooller@geocities.com>" << endl
#endif
<< endl;
// ======================================================================
// GET ARGUMENT LINE PARAMETERS
// LOAD SIDTUNE
// CONFIGURE THE EMULATOR ENGINE
// ======================================================================
const int FLAG_STDIN = 0x01;
const int FLAG_ULAW = 0x08;
int flags = 0;
// Defaults.
myEmuConfig.frequency = 44100;
myEmuConfig.channels = SIDEMU_MONO;
myEmuConfig.bitsPerSample = SIDEMU_8BIT;
myEmuConfig.memoryMode = MPU_BANK_SWITCHING;
uword selectedSong = 0;
int seconds = 60;
int secondsToSkip = 0;
int muteVal = 0; // which voices to mute
fadeIn.seconds = 0;
fadeIn.buffer = fadeIn_buffer_8;
fadeOut.seconds = 2;
fadeOut.buffer = fadeOut_buffer_8;
// File argument numbers.
int infile = 0, outfile = 0;
// Parse command line arguments.
for ( int a = 1; a < argc; a++)
{
if ( argv[a][0] == '-')
{
#ifndef __MSDOS__
// Reading from stdin.
if ( strlen(argv[a]) == 1 )
{
if ( infile == 0 )
{
infile = a;
flags |= FLAG_STDIN;
}
else
{
printtext(ERR_SYNTAX);
}
break;
}
#endif
if ( myStrNcaseCmp( &argv[a][1], "fout" ) == 0 )
{
fadeOut.seconds = atoi(argv[a]+5);
}
else if ( myStrNcaseCmp( &argv[a][1], "fin" ) == 0 )
{
fadeIn.seconds = atoi(argv[a]+4);
}
else if ( myStrNcaseCmp( &argv[a][1], "nf" ) == 0 )
{
myEmuConfig.emulateFilter = false;
}
else if ( myStrNcaseCmp( &argv[a][1], "ns" ) == 0 )
{
myEmuConfig.mos8580 = true;
}
else if ( myStrNcaseCmp( &argv[a][1], "a2" ) == 0 )
{
myEmuConfig.memoryMode = MPU_TRANSPARENT_ROM;
}
else if ( myStrNcaseCmp( &argv[a][1], "a" ) == 0 )
{
myEmuConfig.memoryMode = MPU_PLAYSID_ENVIRONMENT;
}
else if ( myStrNcaseCmp( &argv[a][1], "b" ) == 0 )
{
secondsToSkip = atoi(argv[a]+2);
}
else if ( myStrNcaseCmp( &argv[a][1], "f" ) == 0 )
{
myEmuConfig.frequency = (ulong)atoi(argv[a]+2);
}
else if ( myStrNcaseCmp( &argv[a][1], "h" ) == 0 )
{
printtext(ERR_SYNTAX);
}
else if ( myStrNcaseCmp( &argv[a][1], "m" ) == 0 )
{
for ( ubyte j = 2; j < strlen(argv[a]); j++ )
{
if ( (argv[a][j]>='1') && (argv[a][j]<='4') )
{
muteVal |= (1 << argv[a][j]-'1');
}
}
myEmuConfig.volumeControl = SIDEMU_VOLCONTROL;
}
else if ( myStrNcaseCmp( &argv[a][1], "n" ) == 0 )
{
myEmuConfig.clockSpeed = SIDTUNE_CLOCK_NTSC;
myEmuConfig.forceSongSpeed = true;
}
else if ( myStrNcaseCmp( &argv[a][1], "o" ) == 0 )
{
selectedSong = atoi(argv[a]+2);
}
else if ( myStrNcaseCmp( &argv[a][1], "t" ) == 0 )
{
seconds = atoi(argv[a]+2);
}
else if ( myStrNcaseCmp( &argv[a][1], "ss" ) == 0 )
{
myEmuConfig.channels = SIDEMU_STEREO;
myEmuConfig.volumeControl = SIDEMU_STEREOSURROUND;
}
else if ( myStrNcaseCmp( &argv[a][1], "s" ) == 0 )
{
myEmuConfig.channels = SIDEMU_STEREO;
}
else if ( myStrNcaseCmp( &argv[a][1], "u" ) == 0 )
{
flags |= FLAG_ULAW;
}
else if ( myStrNcaseCmp( &argv[a][1], "16" ) == 0 )
{
myEmuConfig.bitsPerSample = SIDEMU_16BIT;
}
else
{
printtext(ERR_SYNTAX);
}
}
else
{
// Set filename argument number.
if ( infile == 0 )
{
infile = a;
}
else if ( outfile == 0 )
{
outfile = a;
}
else
{
printtext(ERR_SYNTAX);
}
}
}
if ( infile == 0 )
{
printtext(ERR_SYNTAX);
}
//
if (flags & FLAG_ULAW)
{
myEmuConfig.frequency = 8000; // 8000 or 8012??
myEmuConfig.channels = SIDEMU_MONO;
myEmuConfig.bitsPerSample = SIDEMU_16BIT;
}
if (myEmuConfig.bitsPerSample == SIDEMU_16BIT)
{
fadeOut.buffer = fadeOut_buffer_16;
fadeIn.buffer = fadeIn_buffer_16;
}
#ifdef __MSDOS__
char waveFileName[MAXPATH];
if ( outfile == 0 )
{
char indrive[MAXDRIVE], inpath[MAXDIR], inname[MAXFILE], inext[MAXEXT];
fnsplit(argv[infile], indrive, inpath, inname, inext);
if ( flags & FLAG_ULAW )
{
fnmerge(waveFileName, indrive, inpath, inname, ".au");
}
else
{
fnmerge(waveFileName, indrive, inpath, inname, ".wav");
}
}
else
{
strcpy(waveFileName, argv[outfile]);
}
#else
char* waveFileName = 0;
if ( outfile == 0 )
{
waveFileName = new char[strlen(argv[infile])+4+1];
strcpy(waveFileName,argv[infile]);
if ( flags & FLAG_ULAW )
{
strcpy(fileExtOfPath(waveFileName),".au");
}
else
{
strcpy(fileExtOfPath(waveFileName),".wav");
}
}
else
{
waveFileName = new char[strlen(argv[outfile])+1];
strcpy(waveFileName,argv[outfile]);
}
#endif
// Create the sidtune object.
sidTune myTune( argv[infile] );
struct sidTuneInfo mySidInfo;
myTune.getInfo( mySidInfo );
if ( !myTune )
{
cerr << mySidInfo.statusString << endl;
exit(EXIT_ERROR_STATUS);
}
else
{
cout << "File format : " << mySidInfo.formatString << endl;
cout << "Condition : " << mySidInfo.statusString << endl;
if ( mySidInfo.numberOfInfoStrings == 3 )
{
cout << "Name : " << mySidInfo.nameString << endl;
cout << "Author : " << mySidInfo.authorString << endl;
cout << "Copyright : " << mySidInfo.copyrightString << endl;
}
else
{
for ( int infoi = 0; infoi < mySidInfo.numberOfInfoStrings; infoi++ )
{
cout << "Description : " << mySidInfo.infoString[infoi] << endl;
}
}
cout << "Load address : $" << hex << setw(4) << setfill('0')
<< mySidInfo.loadAddr << endl;
cout << "Init address : $" << hex << setw(4) << setfill('0')
<< mySidInfo.initAddr << endl;
cout << "Play address : $" << hex << setw(4) << setfill('0')
<< mySidInfo.playAddr << dec << endl;
}
// Alter the SIDPLAY Emulator Engine settings.
myEmuConfig.sampleFormat = (myEmuConfig.bitsPerSample == SIDEMU_16BIT) ? SIDEMU_SIGNED_PCM : SIDEMU_UNSIGNED_PCM;
myEmuEngine.setConfig(myEmuConfig);
// Here mute the voices, if requested.
if (myEmuConfig.volumeControl == SIDEMU_VOLCONTROL)
{
for ( int voice = 1; voice <= 4; voice++ )
{
if ( (muteVal & (1<<(voice-1))) != 0 )
{
myEmuEngine.setVoiceVolume(voice,0,0,0);
}
}
}
// Get the current settings. We ignore the return value, because this code is
// supposed to allow only valid settings.
myEmuEngine.getConfig(myEmuConfig);
// Print the relevant settings.
cout << "SID Filter : " << ((myEmuConfig.emulateFilter == true) ? "Yes" : "No") << endl;
if (myEmuConfig.memoryMode == MPU_PLAYSID_ENVIRONMENT)
{
cout << "Memory mode : PlaySID (this is supposed to fix PlaySID-specific rips)" << endl;
}
else if (myEmuConfig.memoryMode == MPU_TRANSPARENT_ROM)
{
cout << "Memory mode : Transparent ROM (SIDPLAY default)" << endl;
}
else if (myEmuConfig.memoryMode == MPU_BANK_SWITCHING)
{
cout << "Memory mode : Bank Switching" << endl;
}
cout << "Frequency : " << dec << myEmuConfig.frequency << " Hz" << endl;
cout << "Bits/sample : ";
if (flags & FLAG_ULAW)
{
cout << "8 (u-law)" << endl;
}
else
{
cout << dec << myEmuConfig.bitsPerSample << endl;
}
cout << "Channels : " << ((myEmuConfig.channels == SIDEMU_MONO) ? "Mono" : "Stereo") << endl;
myTune.setInfo( mySidInfo );
if ( !sidEmuInitializeSong(myEmuEngine,myTune,selectedSong) )
{
cerr << "ERROR: SID Emulator Engine components not ready" << endl;
exit(EXIT_ERROR_STATUS);
}
myTune.getInfo( mySidInfo );
if ( !myTune )
{
cerr << mySidInfo.statusString;
exit(EXIT_ERROR_STATUS);
}
cout << "Setting song : " << mySidInfo.currentSong
<< " out of " << mySidInfo.songs
<< " (default = " << mySidInfo.startSong << ')' << endl;
cout << "Song speed : " << mySidInfo.speedString << endl;
cout << "File length : " << seconds << " second";
if ( seconds > 1 )
{
cout << 's';
}
cout << endl;
// Open output file stream.
#if defined(SID_HAVE_IOS_BIN)
ofstream waveFile( waveFileName, ios::out|ios::bin|ios::app );
#else
ofstream waveFile( waveFileName, ios::out|ios::binary|ios::app );
#endif
if ( !waveFile || waveFile.tellp()>0 )
{
cerr << "ERROR: Cannot create output file " << "``" << waveFileName << "'', "
<< "probably already exits." << endl;
exit(EXIT_ERROR_STATUS);
}
cout << "Output file : " << waveFileName << endl;
udword sampleBufferSize;
udword dataLength;
uword headerSize;
if (flags & FLAG_ULAW)
{
dataLength = seconds * myEmuConfig.frequency;
#if defined(SID_WORDS_LITTLEENDIAN)
my_au_hdr.length = convertEndianess (dataLength);
#else
my_au_hdr.length = dataLength;
#endif
sampleBufferSize = myEmuConfig.frequency * 2;
headerSize = sizeof(au_hdr);
waveFile.write( (const char*)&my_au_hdr, headerSize );
}
else
{
udword bytesPerSample = myEmuConfig.channels*myEmuConfig.bitsPerSample/8;
udword bytesPerSecond = myEmuConfig.frequency*bytesPerSample;
dataLength = seconds * bytesPerSecond;
sampleBufferSize = bytesPerSecond;
headerSize = sizeof(wav_hdr);
#if defined (SID_WORDS_LITTLEENDIAN)
my_wav_hdr.bitspersmpl = myEmuConfig.bitsPerSample;
my_wav_hdr.bytespersmpl = bytesPerSample;
my_wav_hdr.samplefreq = myEmuConfig.frequency;
my_wav_hdr.modus = myEmuConfig.channels;
my_wav_hdr.bytespersec = bytesPerSecond;
my_wav_hdr.length = dataLength + headerSize - 8;
my_wav_hdr.data_length = dataLength;
#else
my_wav_hdr.bitspersmpl = convertEndianess ((uword)myEmuConfig.bitsPerSample);
my_wav_hdr.bytespersmpl = convertEndianess ((uword)bytesPerSample);
my_wav_hdr.samplefreq = convertEndianess ((udword)myEmuConfig.frequency);
my_wav_hdr.modus = convertEndianess ((uword)myEmuConfig.channels);
my_wav_hdr.bytespersec = convertEndianess ((udword)bytesPerSecond);
my_wav_hdr.length = convertEndianess (dataLength + headerSize - 8);
my_wav_hdr.data_length = convertEndianess (dataLength);
#endif
waveFile.write( (const char*)&my_wav_hdr, headerSize );
}
// Make a buffer that holds 1 second of audio data.
ubyte* sampleBuffer = new ubyte[sampleBufferSize];
// Calculate fadeIn and -out variables.
if ( seconds == 0 )
{
seconds = 60; // force the default
}
if ( seconds < fadeIn.seconds )
{
cerr << "Warning: Bad fade-in time." << endl;
fadeIn.seconds = seconds /2;
}
if ( seconds < fadeOut.seconds )
{
cerr << "Warning: Bad fade-out time." << endl;
fadeOut.seconds = seconds /2;
}
if (( fadeIn.seconds + fadeOut.seconds ) > seconds )
{
cerr << "Warning: Bad total fading time." << endl;
fadeIn.seconds = 0;
fadeOut.seconds = 0;
}
fadeIn.currentLevel = 0; // minimum volume (silence)
fadeOut.currentLevel = fadeLevel; // maximum volume
fadeIn.step = ( fadeIn.seconds * sampleBufferSize / (myEmuConfig.bitsPerSample/8) ) / fadeLevel;
fadeOut.step = ( fadeOut.seconds * sampleBufferSize / (myEmuConfig.bitsPerSample/8) ) / fadeLevel;
fadeOut.count = ( fadeIn.count = 0 );
cout << endl;
cout << "Generating sample data...don't interrupt !" << endl;
if (secondsToSkip > 0)
cout << "Skipping seconds : ";
int skipped = 0;
while (skipped < secondsToSkip)
{
sidEmuFillBuffer( myEmuEngine, myTune, sampleBuffer, sampleBufferSize );
skipped++;
// Print progress report.
cout << setw(5) << setfill(' ') << skipped << "\b\b\b\b\b" << flush;
};
if (secondsToSkip > 0)
cout << endl;
cout << "Length of output file (bytes) : ";
dataLength = 0;
for ( int sec = 0; sec < seconds; sec++ )
{
sidEmuFillBuffer( myEmuEngine, myTune, sampleBuffer, sampleBufferSize );
if ( sec < ( fadeIn.seconds ))
(*fadeIn.buffer)( sampleBuffer, sampleBufferSize );
if ( sec >= ( seconds - fadeOut.seconds ))
(*fadeOut.buffer)( sampleBuffer, sampleBufferSize );
if (flags & FLAG_ULAW)
{
buffer2ulaw(sampleBuffer, sampleBufferSize);
waveFile.write( (const char*)sampleBuffer, sampleBufferSize / 2 );
}
else
{
#if defined(SID_WORDS_BIGENDIAN)
if (myEmuConfig.bitsPerSample == SIDEMU_16BIT)
{
endianswitch_buffer( sampleBuffer, sampleBufferSize );
}
#endif
waveFile.write( (const char*)sampleBuffer, sampleBufferSize );
}
// Print progress report.
cout << setw(10) << setfill(' ') << ( dataLength + headerSize) << "\b\b\b\b\b\b\b\b\b\b" << flush;
if (flags & FLAG_ULAW)
dataLength += sampleBufferSize / 2;
else
dataLength += sampleBufferSize;
}
// Finish progress report.
cout << setw(10) << setfill(' ') << ( dataLength + headerSize) << endl;
waveFile.close();
delete[] waveFileName;
delete[] sampleBuffer;
cout << endl << "Please do not forget to give the credits whenever using a waveform created" << endl
<< "by this application !" << endl << endl;
return 0;
}
void fadeOut_buffer_8( ubyte* sampleBuffer, udword sampleBufferSize )
{
for ( udword i = 0; i < sampleBufferSize; i++ )
{
sbyte sam = (sbyte)( 0x80 ^ *(sampleBuffer +i));
sword modsam = sam * fadeOut.currentLevel;
modsam /= fadeLevel;
sam = (sbyte)modsam;
*(sampleBuffer +i) = 0x80 ^ sam;
fadeOut.count++;
if ( fadeOut.count >= fadeOut.step )
{
if ( fadeOut.currentLevel > 0 )
{
fadeOut.currentLevel--;
}
fadeOut.count = 0;
}
}
}
void fadeOut_buffer_16( ubyte* sampleBuffer, udword sampleBufferSize )
{
sword *buf = (sword *)sampleBuffer;
sampleBufferSize /= 2;
for ( udword i = 0; i < sampleBufferSize; i++ )
{
sword sam = *(buf +i);
sdword modsam = sam * fadeOut.currentLevel;
modsam /= fadeLevel;
sam = (sword)modsam;
*(buf +i) = sam;
fadeOut.count++;
if ( fadeOut.count >= fadeOut.step )
{
if ( fadeOut.currentLevel > 0 )
{
fadeOut.currentLevel--;
}
fadeOut.count = 0;
}
}
}
void fadeIn_buffer_8( ubyte* sampleBuffer, udword sampleBufferSize )
{
for ( udword i = 0; i < sampleBufferSize; i++ )
{
sbyte sam = (sbyte)( 0x80 ^ *(sampleBuffer +i));
sword modsam = sam * fadeIn.currentLevel;
modsam /= fadeLevel;
sam = (sbyte)modsam;
*(sampleBuffer +i) = 0x80 ^ sam;
fadeIn.count++;
if ( fadeIn.count >= fadeIn.step )
{
if ( fadeIn.currentLevel < fadeLevel )
{
fadeIn.currentLevel++;
}
fadeIn.count = 0;
}
}
}
void fadeIn_buffer_16( ubyte* sampleBuffer, udword sampleBufferSize )
{
sword *buf = (sword *)sampleBuffer;
sampleBufferSize /= 2;
for ( udword i = 0; i < sampleBufferSize; i++ )
{
sword sam = *(buf +i);
sdword modsam = sam * fadeIn.currentLevel;
modsam /= fadeLevel;
sam = (sword)modsam;
*(buf +i) = sam;
fadeIn.count++;
if ( fadeIn.count >= fadeIn.step )
{
if ( fadeIn.currentLevel < fadeLevel )
{
fadeIn.currentLevel++;
}
fadeIn.count = 0;
}
}
}
void error(char* s1, char* s2 = "")
{
cerr << "ERROR: " << s1 << ' ' << "``" << s2 << "''." << endl;
exit(EXIT_ERROR_STATUS);
}
void printtext(int number)
{
switch (number)
{
case ERR_ENDIANESS:
{
cerr << "ERROR: Hardware endianess improperly configured." << endl;
exit(EXIT_ERROR_STATUS);
break;
}
case ERR_ENGINE: // currently the only true reason the engine should fail
case ERR_NOT_ENOUGH_MEMORY:
{
cerr << "ERROR: Not enough memory." << endl;
exit(EXIT_ERROR_STATUS);
break;
}
case ERR_SYNTAX:
{
#ifdef __MSDOS__
cout << " syntax: sid2wav [-<commands>] <datafile> [outputfile]" << endl
#else
cout << " syntax: sid2wav [-<commands>] <datafile>|- [outputfile]" << endl
#endif
<< " commands: -h display this screen" << endl
<< " -f<num> set frequency in Hz (default: 44100)" << endl
<< " -16 16-bit (default: 8-bit)" << endl
<< " -s stereo (default: mono)" << endl
<< " -ss enable stereo surround" << endl
<< " -u au output (8000Hz mono 8-bit u-law)" << endl
<< " -o<num> set song number (default: preset)" << endl
<< " -a improve PlaySID compatibility (not recommended)" << endl
<< " -a2 transparent ROM memory mode (overrides -a)" << endl
<< " -n enable NTSC-clock speed for VBI tunes (not recommended)" << endl
<< " -nf no SID filter emulation" << endl
<< " -ns MOS 8580 waveforms (default: MOS 6581)" << endl
<< " -m<num> mute voices out of 1,2,3,4 (default: none)" << endl
<< " example: -m13 (voices 1 and 3 off)" << endl
<< " -t<num> set seconds to play (default: 60)" << endl
<< " -b<num> skip first <num> seconds into the song (default: 0)" << endl
<< " -fin<num> fade-in time in seconds (default: 0)" << endl
<< " -fout<num> fade-out time in seconds (default: 2)" << endl
<< endl;
exit(EXIT_ERROR_STATUS);
break;
}
default:
{
cerr << "ERROR: Internal system error." << endl;
exit(EXIT_ERROR_STATUS);
break;
}
}
}
// ------------ Beginning of code 'borrowed' from tracker 4.43 by Marc Espie.
// The only modifications to the code were a few changes from C style
// to C++ style to please the compiler.
short seg_end[8] =
{
0xFF, 0x1FF, 0x3FF, 0x7FF,
0xFFF, 0x1FFF, 0x3FFF, 0x7FFF
};
int search(int val, short *table, int size)
{
int i;
for (i = 0; i < size; i++)
{
if (val <= *table++)
{
return i;
}
}
return size;
}
const int BIAS = 0x84; // Bias for linear code.
// linear2ulaw() - Convert a linear PCM value to u-law
//
// In order to simplify the encoding process, the original linear magnitude
// is biased by adding 33 which shifts the encoding range from (0 - 8158) to
// (33 - 8191). The result can be seen in the following encoding table:
//
// Biased Linear Input Code Compressed Code
// ------------------------ ---------------
// 00000001wxyza 000wxyz
// 0000001wxyzab 001wxyz
// 000001wxyzabc 010wxyz
// 00001wxyzabcd 011wxyz
// 0001wxyzabcde 100wxyz
// 001wxyzabcdef 101wxyz
// 01wxyzabcdefg 110wxyz
// 1wxyzabcdefgh 111wxyz
//
// Each biased linear code has a leading 1 which identifies the segment
// number. The value of the segment number is equal to 7 minus the number
// of leading 0's. The quantization interval is directly available as the
// four bits wxyz. // The trailing bits (a - h) are ignored.
//
// Ordinarily the complement of the resulting code word is used for
// transmission, and so the code word is complemented before it is returned.
//
// For further information see John C. Bellamy's Digital Telephony, 1982,
// John Wiley & Sons, pps 98-111 and 472-476.
unsigned char linear2ulaw(int pcm_val)
// int pcm_val; // 2's complement (16-bit range)
{
int mask;
int seg;
unsigned char uval;
// Get the sign and the magnitude of the value.
if (pcm_val < 0)
{
pcm_val = BIAS - pcm_val;
mask = 0x7F;
}
else
{
pcm_val += BIAS;
mask = 0xFF;
}
// Convert the scaled magnitude to segment number.
seg = search(pcm_val, seg_end, 8);
// Combine the sign, segment, quantization bits;
// and complement the code word.
if (seg >= 8) // out of range, return maximum value.
{
return 0x7F ^ mask;
}
else
{
uval = (seg << 4) | ((pcm_val >> (seg + 3)) & 0xF);
return uval ^ mask;
}
}
//
// ------------------- End of code 'borrowed' from tracker 4.43 by Marc Espie
//
// Assume incoming data is 16-bit signed values.
// sampleBufferSize is the size in bytes of the buffer sampleBuffer
//
void buffer2ulaw( ubyte* sampleBuffer, udword sampleBufferSize )
{
sword *wordbuffer = (sword *) sampleBuffer;
udword numsamples = sampleBufferSize / 2;
for (udword i = 0; i < numsamples; i++)
{
sampleBuffer[i] = linear2ulaw ((~wordbuffer[i]) + 1); // two's complement
}
}
//
// Incoming data is 16-bit values which needs an endian-switch
// sampleBufferSize is the size in bytes of the buffer sampleBuffer
//
void endianswitch_buffer( ubyte* sampleBuffer, udword sampleBufferSize )
{
uword *wordbuffer = (uword *) sampleBuffer;
udword numsamples = sampleBufferSize / 2;
for (udword i = 0; i < numsamples; i++)
{
wordbuffer[i] = convertEndianess (wordbuffer[i]);
}
}
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