/* TiMidity -- Experimental MIDI to WAVE converter Copyright (C) 1995 Tuukka Toivonen 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. */ /* This is for use with the SDL library */ #define SDL #if (defined(WIN32) || defined(_WIN32)) && !defined(__WIN32__) #define __WIN32__ #endif #ifndef LITTLE_ENDIAN #define LITTLE_ENDIAN #endif #include /* When a patch file can't be opened, one of these extensions is appended to the filename and the open is tried again. */ #define PATCH_EXT_LIST { ".pat", 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) | (1<<15)) #define DEFAULT_DRUMCHANNELS ((1<<9)) /* 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. */ #define DEFAULT_RATE 32000 #define DEFAULT_VOICES 32 #define MAX_VOICES 48 /* 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 /* 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 /* 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)) # define XCHG_LONG(x) ((((x)&0xFF)<<24) | \ (((x)&0xFF00)<<8) | \ (((x)&0xFF0000)>>8) | \ (((x)>>24)&0xFF)) #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 /* These affect general volume */ #define GUARD_BITS 3 #define AMP_BITS (15-GUARD_BITS) #ifdef LOOKUP_HACK typedef int8_t sample_t; typedef uint8_t final_volume_t; # define FINAL_VOLUME(v) (~_l2u[v]) # define MIXUP_SHIFT 5 # define MAX_AMP_VALUE 4095 #else typedef int16_t sample_t; typedef int32_t 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) (float)((a) * (double)(1<<(b))) # define FSCALENEG(a,b) (float)((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 #ifndef PI const float PI = 3.14159265358979323846f; #endif /* The path separator (D.M.) */ //#ifdef __WIN32__ # define PATH_SEP '\\' # define PATH_STRING "\\" //#else //# define PATH_SEP '/' //# define PATH_STRING "/" //#endif