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- /*
- TiMidity -- Experimental MIDI to WAVE converter
- Copyright (C) 1995 Tuukka Toivonen <toivonen@clinet.fi>
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- /* Filename extension, followed by command to run decompressor so that
- output is written to stdout. Terminate the list with a 0.
-
- Any file with a name ending in one of these strings will be run
- through the corresponding decompressor. If you don't like this
- behavior, you can undefine DECOMPRESSOR_LIST to disable automatic
- decompression entirely.
-
- This is currently ignored for Win32. */
- #define DECOMPRESSOR_LIST { \
- ".gz", "gzip -cd %s", \
- ".Z", "gzip -cd %s", \
- ".zip", "unzip -p %s", \
- ".lha", "lha -pq %s", \
- ".lzh", "lha -pq %s", \
- ".shn", "shorten -x %s -", \
- ".wav", "wav2pat %s", \
- 0 }
-
- /* When a patch file can't be opened, one of these extensions is
- appended to the filename and the open is tried again.
-
- This is ignored for Win32, which uses only ".pat" (see the bottom
- of this file if you need to change this.) */
- #define PATCH_EXT_LIST { \
- ".pat", \
- ".shn", ".pat.shn", \
- ".gz", ".pat.gz", \
- 0 }
-
- /* Acoustic Grand Piano seems to be the usual default instrument. */
- #define DEFAULT_PROGRAM 0
-
- /* 9 here is MIDI channel 10, which is the standard percussion channel.
- Some files (notably C:\WINDOWS\CANYON.MID) think that 16 is one too.
- On the other hand, some files know that 16 is not a drum channel and
- try to play music on it. This is now a runtime option, so this isn't
- a critical choice anymore. */
- /*#define DEFAULT_DRUMCHANNELS (1<<9) */
- #define DEFAULT_DRUMCHANNELS ((1<<9) | (1<<15))
-
- /* A somewhat arbitrary frequency range. The low end of this will
- sound terrible as no lowpass filtering is performed on most
- instruments before resampling. */
- #define MIN_OUTPUT_RATE 4000
- #define MAX_OUTPUT_RATE 65000
-
- /* In percent. */
- #define DEFAULT_AMPLIFICATION 70
-
- /* Default sampling rate, default polyphony, and maximum polyphony.
- All but the last can be overridden from the command line. */
- #ifdef __EMX__
- #define DEFAULT_RATE 22050
- #else
- #define DEFAULT_RATE 32000
- #endif
- #define DEFAULT_VOICES 32
- #define MAX_VOICES 48
-
- /* The size of the internal buffer is 2^AUDIO_BUFFER_BITS samples.
- This determines maximum number of samples ever computed in a row.
-
- For Linux and FreeBSD users:
-
- This also specifies the size of the buffer fragment. A smaller
- fragment gives a faster response in interactive mode -- 10 or 11 is
- probably a good number. Unfortunately some sound cards emit a click
- when switching DMA buffers. If this happens to you, try increasing
- this number to reduce the frequency of the clicks.
-
- For other systems:
-
- You should probably use a larger number for improved performance.
-
- */
- #ifdef __WIN32__
- #define AUDIO_BUFFER_BITS 12
- #else
- #define AUDIO_BUFFER_BITS 11
- #endif
-
- /* 1000 here will give a control ratio of 22:1 with 22 kHz output.
- Higher CONTROLS_PER_SECOND values allow more accurate rendering
- of envelopes and tremolo. The cost is CPU time. */
- #define CONTROLS_PER_SECOND 1000
-
- /* Strongly recommended. This option increases CPU usage by half, but
- without it sound quality is very poor. */
- #define LINEAR_INTERPOLATION
-
- /* This is an experimental kludge that needs to be done right, but if
- you've got an 8-bit sound card, or cheap multimedia speakers hooked
- to your 16-bit output device, you should definitely give it a try.
-
- Defining LOOKUP_HACK causes table lookups to be used in mixing
- instead of multiplication. We convert the sample data to 8 bits at
- load time and volumes to logarithmic 7-bit values before looking up
- the product, which degrades sound quality noticeably.
-
- Defining LOOKUP_HACK should save ~20% of CPU on an Intel machine.
- LOOKUP_INTERPOLATION might give another ~5% */
- /* #define LOOKUP_HACK
- #define LOOKUP_INTERPOLATION */
-
- /* Make envelopes twice as fast. Saves ~20% CPU time (notes decay
- faster) and sounds more like a GUS. There is now a command line
- option to toggle this as well. */
- #define FAST_DECAY
-
- /* How many bits to use for the fractional part of sample positions.
- This affects tonal accuracy. The entire position counter must fit
- in 32 bits, so with FRACTION_BITS equal to 12, the maximum size of
- a sample is 1048576 samples (2 megabytes in memory). The GUS gets
- by with just 9 bits and a little help from its friends...
- "The GUS does not SUCK!!!" -- a happy user :) */
- #define FRACTION_BITS 12
-
- /* For some reason the sample volume is always set to maximum in all
- patch files. Define this for a crude adjustment that may help
- equalize instrument volumes. */
- #define ADJUST_SAMPLE_VOLUMES
-
- /* If you have root access, you can define DANGEROUS_RENICE and chmod
- timidity setuid root to have it automatically raise its priority
- when run -- this may make it possible to play MIDI files in the
- background while running other CPU-intensive jobs. Of course no
- amount of renicing will help if the CPU time simply isn't there.
-
- The root privileges are used and dropped at the beginning of main()
- in timidity.c -- please check the code to your satisfaction before
- using this option. (And please check sections 11 and 12 in the
- GNU General Public License (under GNU Emacs, hit ^H^W) ;) */
- /* #define DANGEROUS_RENICE -15 */
-
- /* The number of samples to use for ramping out a dying note. Affects
- click removal. */
- #define MAX_DIE_TIME 20
-
- /* On some machines (especially PCs without math coprocessors),
- looking up sine values in a table will be significantly faster than
- computing them on the fly. Uncomment this to use lookups. */
- /* #define LOOKUP_SINE */
-
- /* Shawn McHorse's resampling optimizations. These may not in fact be
- faster on your particular machine and compiler. You'll have to run
- a benchmark to find out. */
- #define PRECALC_LOOPS
-
- /* If calling ldexp() is faster than a floating point multiplication
- on your machine/compiler/libm, uncomment this. It doesn't make much
- difference either way, but hey -- it was on the TODO list, so it
- got done. */
- /* #define USE_LDEXP */
-
- /**************************************************************************/
- /* Anything below this shouldn't need to be changed unless you're porting
- to a new machine with other than 32-bit, big-endian words. */
- /**************************************************************************/
-
- /* change FRACTION_BITS above, not these */
- #define INTEGER_BITS (32 - FRACTION_BITS)
- #define INTEGER_MASK (0xFFFFFFFF << FRACTION_BITS)
- #define FRACTION_MASK (~ INTEGER_MASK)
-
- /* This is enforced by some computations that must fit in an int */
- #define MAX_CONTROL_RATIO 255
-
- /* Audio buffer size has to be a power of two to allow DMA buffer
- fragments under the VoxWare (Linux & FreeBSD) audio driver */
- #define AUDIO_BUFFER_SIZE (1<<AUDIO_BUFFER_BITS)
-
- /* Byte order, defined in <machine/endian.h> for FreeBSD and DEC OSF/1 */
- #ifdef DEC
- #include <machine/endian.h>
- #endif
-
- #if defined(linux) || defined(__EMX__)
- /*
- * Byte order is defined in <bytesex.h> as __BYTE_ORDER, that need to
- * be checked against __LITTLE_ENDIAN and __BIG_ENDIAN defined in <endian.h>
- * <endian.h> includes automagically <bytesex.h>
- * for Linux.
- */
- #ifdef __EMX__
- #include <386/endian.h>
- #endif
-
- /*
- * We undef the two things to start with a clean situation
- * (oddly enough, <endian.h> defines under certain conditions
- * the two things below, as __LITTLE_ENDIAN and __BIG_ENDIAN, that
- * are useless for our plans)
- */
- #undef LITTLE_ENDIAN
- #undef BIG_ENDIAN
-
- # if __BYTE_ORDER == __LITTLE_ENDIAN
- # define LITTLE_ENDIAN
- # elif __BYTE_ORDER == __BIG_ENDIAN
- # define BIG_ENDIAN
- # else
- # error No byte sex defined
- # endif
- #endif /* linux */
-
- /* Win32 on Intel machines */
- #ifdef __WIN32__
- # define LITTLE_ENDIAN
- #endif
-
- /* DEC MMS has 64 bit long words */
- #ifdef DEC
- typedef unsigned int uint32;
- typedef int int32;
- #else
- typedef unsigned long uint32;
- typedef long int32;
- #endif
- typedef unsigned short uint16;
- typedef short int16;
- typedef unsigned char uint8;
- typedef char int8;
-
- /* Instrument files are little-endian, MIDI files big-endian, so we
- need to do some conversions. */
-
- #define XCHG_SHORT(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF))
- #ifdef __i486__
- # define XCHG_LONG(x) \
- ({ int32 __value; \
- asm ("bswap %1; movl %1,%0" : "=g" (__value) : "r" (x)); \
- __value; })
- #else
- # define XCHG_LONG(x) ((((x)&0xFF)<<24) | \
- (((x)&0xFF00)<<8) | \
- (((x)&0xFF0000)>>8) | \
- (((x)>>24)&0xFF))
- #endif
-
- #ifdef LITTLE_ENDIAN
- #define LE_SHORT(x) x
- #define LE_LONG(x) x
- #define BE_SHORT(x) XCHG_SHORT(x)
- #define BE_LONG(x) XCHG_LONG(x)
- #else
- #define BE_SHORT(x) x
- #define BE_LONG(x) x
- #define LE_SHORT(x) XCHG_SHORT(x)
- #define LE_LONG(x) XCHG_LONG(x)
- #endif
-
- #define MAX_AMPLIFICATION 800
-
- /* You could specify a complete path, e.g. "/etc/timidity.cfg", and
- then specify the library directory in the configuration file. */
- #define CONFIG_FILE "timidity.cfg"
-
- /* These affect general volume */
- #define GUARD_BITS 3
- #define AMP_BITS (15-GUARD_BITS)
-
- #ifdef LOOKUP_HACK
- typedef int8 sample_t;
- typedef uint8 final_volume_t;
- # define FINAL_VOLUME(v) (~_l2u[v])
- # define MIXUP_SHIFT 5
- # define MAX_AMP_VALUE 4095
- #else
- typedef int16 sample_t;
- typedef int32 final_volume_t;
- # define FINAL_VOLUME(v) (v)
- # define MAX_AMP_VALUE ((1<<(AMP_BITS+1))-1)
- #endif
-
- #ifdef USE_LDEXP
- # define FSCALE(a,b) ldexp((a),(b))
- # define FSCALENEG(a,b) ldexp((a),-(b))
- #else
- # define FSCALE(a,b) ((a) * (double)(1<<(b)))
- # define FSCALENEG(a,b) ((a) * (1.0L / (double)(1<<(b))))
- #endif
-
- /* Vibrato and tremolo Choices of the Day */
- #define SWEEP_TUNING 38
- #define VIBRATO_AMPLITUDE_TUNING 1.0L
- #define VIBRATO_RATE_TUNING 38
- #define TREMOLO_AMPLITUDE_TUNING 1.0L
- #define TREMOLO_RATE_TUNING 38
-
- #define SWEEP_SHIFT 16
- #define RATE_SHIFT 5
-
- #define VIBRATO_SAMPLE_INCREMENTS 32
-
- #ifdef HPUX
- extern char *sys_errlist[];
- #define PI 3.14159265358979323846
- #endif
-
- #ifdef SUN
- #ifndef SOLARIS
- #include <sys/stdtypes.h>
- #endif
- #include <errno.h>
- extern char *sys_errlist[];
- extern int opterr;
- extern int optind;
- extern int optopt;
- extern char *optarg;
- #define PI 3.14159265358979323846
- #define rindex(s,c) strrchr(s,c)
- #endif
-
- #ifdef __WIN32__
- # include <math.h>
- # define PI M_PI
- # undef DECOMPRESSOR_LIST
- # undef PATCH_EXT_LIST
- # define PATCH_EXT_LIST { ".pat", 0 }
- #endif
-
- /* The path separator (D.M.) */
- #ifdef __WIN32__
- # define PATH_SEP '\\'
- # define PATH_STRING "\\"
- #else
- # define PATH_SEP '/'
- # define PATH_STRING "/"
- #endif
-
- #ifdef DEC
- #include <errno.h>
- #define PI 3.14159265358979323846
- #endif
-