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8752 terminx 1
/* TinySoundFont - v0.8 - SoundFont2 synthesizer - https://github.com/schellingb/TinySoundFont
2
                                     no warranty implied; use at your own risk
3
   Do this:
4
      #define TSF_IMPLEMENTATION
5
   before you include this file in *one* C or C++ file to create the implementation.
6
   // i.e. it should look like this:
7
   #include ...
8
   #include ...
9
   #define TSF_IMPLEMENTATION
10
   #include "tsf.h"
11
 
12
   [OPTIONAL] #define TSF_NO_STDIO to remove stdio dependency
13
   [OPTIONAL] #define TSF_MALLOC, TSF_REALLOC, and TSF_FREE to avoid stdlib.h
14
   [OPTIONAL] #define TSF_MEMCPY, TSF_MEMSET to avoid string.h
15
   [OPTIONAL] #define TSF_POW, TSF_POWF, TSF_EXPF, TSF_LOG, TSF_TAN, TSF_LOG10, TSF_SQRT to avoid math.h
16
 
17
   NOT YET IMPLEMENTED
18
     - Support for ChorusEffectsSend and ReverbEffectsSend generators
19
     - Better low-pass filter without lowering performance too much
20
     - Support for modulators
21
 
22
   LICENSE (MIT)
23
 
24
   Copyright (C) 2017, 2018 Bernhard Schelling
25
   Based on SFZero, Copyright (C) 2012 Steve Folta (https://github.com/stevefolta/SFZero)
26
 
27
   Permission is hereby granted, free of charge, to any person obtaining a copy of this
28
   software and associated documentation files (the "Software"), to deal in the Software
29
   without restriction, including without limitation the rights to use, copy, modify, merge,
30
   publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
31
   to whom the Software is furnished to do so, subject to the following conditions:
32
 
33
   The above copyright notice and this permission notice shall be included in all
34
   copies or substantial portions of the Software.
35
 
36
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
37
   INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
38
   PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
39
   LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
40
   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
41
   USE OR OTHER DEALINGS IN THE SOFTWARE.
42
 
43
*/
44
 
45
#ifndef TSF_INCLUDE_TSF_INL
46
#define TSF_INCLUDE_TSF_INL
47
 
48
#ifdef __cplusplus
49
extern "C" {
50
#  define CPP_DEFAULT0 = 0
51
#else
52
#  define CPP_DEFAULT0
53
#endif
54
 
55
//define this if you want the API functions to be static
56
#ifdef TSF_STATIC
57
#define TSFDEF static
58
#else
59
#define TSFDEF extern
60
#endif
61
 
62
// The load functions will return a pointer to a struct tsf which all functions
63
// thereafter take as the first parameter.
64
// On error the tsf_load* functions will return NULL most likely due to invalid
65
// data (or if the file did not exist in tsf_load_filename).
66
typedef struct tsf tsf;
67
 
68
#ifndef TSF_NO_STDIO
69
// Directly load a SoundFont from a .sf2 file path
70
TSFDEF tsf* tsf_load_filename(const char* filename);
71
#endif
72
 
73
// Load a SoundFont from a block of memory
74
TSFDEF tsf* tsf_load_memory(const void* buffer, int size);
75
 
76
// Stream structure for the generic loading
77
struct tsf_stream
78
{
79
        // Custom data given to the functions as the first parameter
80
        void* data;
81
 
82
        // Function pointer will be called to read 'size' bytes into ptr (returns number of read bytes)
83
        int (*read)(void* data, void* ptr, unsigned int size);
84
 
85
        // Function pointer will be called to skip ahead over 'count' bytes (returns 1 on success, 0 on error)
86
        int (*skip)(void* data, unsigned int count);
87
};
88
 
89
// Generic SoundFont loading method using the stream structure above
90
TSFDEF tsf* tsf_load(struct tsf_stream* stream);
91
 
92
// Free the memory related to this tsf instance
93
TSFDEF void tsf_close(tsf* f);
94
 
95
// Stop all playing notes immediatly and reset all channel parameters
96
TSFDEF void tsf_reset(tsf* f);
97
 
98
// Returns the preset index from a bank and preset number, or -1 if it does not exist in the loaded SoundFont
99
TSFDEF int tsf_get_presetindex(const tsf* f, int bank, int preset_number);
100
 
101
// Returns the number of presets in the loaded SoundFont
102
TSFDEF int tsf_get_presetcount(const tsf* f);
103
 
104
// Returns the name of a preset index >= 0 and < tsf_get_presetcount()
105
TSFDEF const char* tsf_get_presetname(const tsf* f, int preset_index);
106
 
107
// Returns the name of a preset by bank and preset number
108
TSFDEF const char* tsf_bank_get_presetname(const tsf* f, int bank, int preset_number);
109
 
110
// Supported output modes by the render methods
111
enum TSFOutputMode
112
{
113
        // Two channels with single left/right samples one after another
114
        TSF_STEREO_INTERLEAVED,
115
        // Two channels with all samples for the left channel first then right
116
        TSF_STEREO_UNWEAVED,
117
        // A single channel (stereo instruments are mixed into center)
118
        TSF_MONO,
119
};
120
 
121
// Thread safety:
122
// Your audio output which calls the tsf_render* functions will most likely
123
// run on a different thread than where the playback tsf_note* functions
124
// are called. In which case some sort of concurrency control like a
125
// mutex needs to be used so they are not called at the same time.
126
 
127
// Setup the parameters for the voice render methods
128
//   outputmode: if mono or stereo and how stereo channel data is ordered
129
//   samplerate: the number of samples per second (output frequency)
130
//   global_gain_db: volume gain in decibels (>0 means higher, <0 means lower)
131
TSFDEF void tsf_set_output(tsf* f, enum TSFOutputMode outputmode, int samplerate, float global_gain_db CPP_DEFAULT0);
132
 
133
// Start playing a note
134
//   preset_index: preset index >= 0 and < tsf_get_presetcount()
135
//   key: note value between 0 and 127 (60 being middle C)
136
//   vel: velocity as a float between 0.0 (equal to note off) and 1.0 (full)
137
//   bank: instrument bank number (alternative to preset_index)
138
//   preset_number: preset number (alternative to preset_index)
139
//   (bank_note_on returns 0 if preset does not exist, otherwise 1)
140
TSFDEF void tsf_note_on(tsf* f, int preset_index, int key, float vel);
141
TSFDEF int  tsf_bank_note_on(tsf* f, int bank, int preset_number, int key, float vel);
142
 
143
// Stop playing a note
144
//   (bank_note_off returns 0 if preset does not exist, otherwise 1)
145
TSFDEF void tsf_note_off(tsf* f, int preset_index, int key);
146
TSFDEF int  tsf_bank_note_off(tsf* f, int bank, int preset_number, int key);
147
 
148
// Stop playing all notes (end with sustain and release)
149
TSFDEF void tsf_note_off_all(tsf* f);
150
 
151
// Returns the number of active voices
152
TSFDEF int tsf_active_voice_count(tsf* f);
153
 
154
// Render output samples into a buffer
155
// You can either render as signed 16-bit values (tsf_render_short) or
156
// as 32-bit float values (tsf_render_float)
157
//   buffer: target buffer of size samples * output_channels * sizeof(type)
158
//   samples: number of samples to render
159
//   flag_mixing: if 0 clear the buffer first, otherwise mix into existing data
160
TSFDEF void tsf_render_short(tsf* f, short* buffer, int samples, int flag_mixing CPP_DEFAULT0);
161
TSFDEF void tsf_render_float(tsf* f, float* buffer, int samples, int flag_mixing CPP_DEFAULT0);
162
 
163
// Higher level channel based functions, set up channel parameters
164
//   channel: channel number
165
//   preset_index: preset index >= 0 and < tsf_get_presetcount()
166
//   preset_number: preset number (alternative to preset_index)
167
//   flag_mididrums: 0 for normal channels, otherwise apply MIDI drum channel rules
168
//   bank: instrument bank number (alternative to preset_index)
169
//   pan: stereo panning value from 0.0 (left) to 1.0 (right) (default 0.5 center)
170
//   volume: linear volume scale factor (default 1.0 full)
171
//   pitch_wheel: pitch wheel position 0 to 16383 (default 8192 unpitched)
172
//   pitch_range: range of the pitch wheel in semitones (default 2.0, total +/- 2 semitones)
173
//   tuning: tuning of all playing voices in semitones (default 0.0, standard (A440) tuning)
174
//   (set_preset_number and set_bank_preset return 0 if preset does not exist, otherwise 1)
175
TSFDEF void tsf_channel_set_presetindex(tsf* f, int channel, int preset_index);
176
TSFDEF int  tsf_channel_set_presetnumber(tsf* f, int channel, int preset_number, int flag_mididrums CPP_DEFAULT0);
177
TSFDEF void tsf_channel_set_bank(tsf* f, int channel, int bank);
178
TSFDEF int  tsf_channel_set_bank_preset(tsf* f, int channel, int bank, int preset_number);
179
TSFDEF void tsf_channel_set_pan(tsf* f, int channel, float pan);
180
TSFDEF void tsf_channel_set_volume(tsf* f, int channel, float volume);
181
TSFDEF void tsf_channel_set_pitchwheel(tsf* f, int channel, int pitch_wheel);
182
TSFDEF void tsf_channel_set_pitchrange(tsf* f, int channel, float pitch_range);
183
TSFDEF void tsf_channel_set_tuning(tsf* f, int channel, float tuning);
184
 
185
// Start or stop playing notes on a channel (needs channel preset to be set)
186
//   channel: channel number
187
//   key: note value between 0 and 127 (60 being middle C)
188
//   vel: velocity as a float between 0.0 (equal to note off) and 1.0 (full)
189
TSFDEF void tsf_channel_note_on(tsf* f, int channel, int key, float vel);
190
TSFDEF void tsf_channel_note_off(tsf* f, int channel, int key);
191
TSFDEF void tsf_channel_note_off_all(tsf* f, int channel); //end with sustain and release
192
TSFDEF void tsf_channel_sounds_off_all(tsf* f, int channel); //end immediatly
193
 
194
// Apply a MIDI control change to the channel (not all controllers are supported!)
195
TSFDEF void tsf_channel_midi_control(tsf* f, int channel, int controller, int control_value);
196
 
197
// Get current values set on the channels
198
TSFDEF int tsf_channel_get_preset_index(tsf* f, int channel);
199
TSFDEF int tsf_channel_get_preset_bank(tsf* f, int channel);
200
TSFDEF int tsf_channel_get_preset_number(tsf* f, int channel);
201
TSFDEF float tsf_channel_get_pan(tsf* f, int channel);
202
TSFDEF float tsf_channel_get_volume(tsf* f, int channel);
203
TSFDEF int tsf_channel_get_pitchwheel(tsf* f, int channel);
204
TSFDEF float tsf_channel_get_pitchrange(tsf* f, int channel);
205
TSFDEF float tsf_channel_get_tuning(tsf* f, int channel);
206
 
207
#ifdef __cplusplus
208
#  undef CPP_DEFAULT0
209
}
210
#endif
211
 
212
// end header
213
// ---------------------------------------------------------------------------------------------------------
214
#endif //TSF_INCLUDE_TSF_INL
215
 
216
#ifdef TSF_IMPLEMENTATION
217
 
218
// The lower this block size is the more accurate the effects are.
219
// Increasing the value significantly lowers the CPU usage of the voice rendering.
220
// If LFO affects the low-pass filter it can be hearable even as low as 8.
221
#ifndef TSF_RENDER_EFFECTSAMPLEBLOCK
222
#define TSF_RENDER_EFFECTSAMPLEBLOCK 64
223
#endif
224
 
225
// Grace release time for quick voice off (avoid clicking noise)
226
#define TSF_FASTRELEASETIME 0.01f
227
 
228
#if !defined(TSF_MALLOC) || !defined(TSF_FREE) || !defined(TSF_REALLOC)
229
#  include <stdlib.h>
230
#  define TSF_MALLOC  malloc
231
#  define TSF_FREE    free
232
#  define TSF_REALLOC realloc
233
#endif
234
 
235
#if !defined(TSF_MEMCPY) || !defined(TSF_MEMSET)
236
#  include <string.h>
237
#  define TSF_MEMCPY  memcpy
238
#  define TSF_MEMSET  memset
239
#endif
240
 
241
#if !defined(TSF_POW) || !defined(TSF_POWF) || !defined(TSF_EXPF) || !defined(TSF_LOG) || !defined(TSF_TAN) || !defined(TSF_LOG10) || !defined(TSF_SQRT)
242
#  include <math.h>
243
#  if !defined(__cplusplus) && !defined(NAN) && !defined(powf) && !defined(expf) && !defined(sqrtf)
244
#    define powf (float)pow // deal with old math.h
245
#    define expf (float)exp // files that come without
246
#    define sqrtf (float)sqrt // powf, expf and sqrtf
247
#  endif
248
#  define TSF_POW     pow
249
#  define TSF_POWF    powf
250
#  define TSF_EXPF    expf
251
#  define TSF_LOG     log
252
#  define TSF_TAN     tan
253
#  define TSF_LOG10   log10
254
#  define TSF_SQRTF   sqrtf
255
#endif
256
 
257
#ifndef TSF_NO_STDIO
258
#  include <stdio.h>
259
#endif
260
 
261
#define TSF_TRUE 1
262
#define TSF_FALSE 0
263
#define TSF_BOOL char
264
#define TSF_PI 3.14159265358979323846264338327950288
265
#define TSF_NULL 0
266
 
267
#ifdef __cplusplus
268
extern "C" {
269
#endif
270
 
271
typedef char tsf_fourcc[4];
272
typedef signed char tsf_s8;
273
typedef unsigned char tsf_u8;
274
typedef unsigned short tsf_u16;
275
typedef signed short tsf_s16;
276
typedef unsigned int tsf_u32;
277
typedef char tsf_char20[20];
278
 
279
#define TSF_FourCCEquals(value1, value2) (value1[0] == value2[0] && value1[1] == value2[1] && value1[2] == value2[2] && value1[3] == value2[3])
280
 
281
struct tsf
282
{
283
        struct tsf_preset* presets;
284
        float* fontSamples;
285
        struct tsf_voice* voices;
286
        struct tsf_channels* channels;
287
        float* outputSamples;
288
 
289
        int presetNum;
290
        int voiceNum;
291
        int outputSampleSize;
292
        unsigned int voicePlayIndex;
293
 
294
        enum TSFOutputMode outputmode;
295
        float outSampleRate;
296
        float globalGainDB;
297
};
298
 
299
#ifndef TSF_NO_STDIO
300
static int tsf_stream_stdio_read(FILE* f, void* ptr, unsigned int size) { return (int)fread(ptr, 1, size, f); }
301
static int tsf_stream_stdio_skip(FILE* f, unsigned int count) { return !fseek(f, count, SEEK_CUR); }
302
TSFDEF tsf* tsf_load_filename(const char* filename)
303
{
304
        tsf* res;
305
        struct tsf_stream stream = { TSF_NULL, (int(*)(void*,void*,unsigned int))&tsf_stream_stdio_read, (int(*)(void*,unsigned int))&tsf_stream_stdio_skip };
306
        #if __STDC_WANT_SECURE_LIB__
307
        FILE* f = TSF_NULL; fopen_s(&f, filename, "rb");
308
        #else
309
        FILE* f = fopen(filename, "rb");
310
        #endif
311
        if (!f)
312
        {
313
                //if (e) *e = TSF_FILENOTFOUND;
314
                return TSF_NULL;
315
        }
316
        stream.data = f;
317
        res = tsf_load(&stream);
318
        fclose(f);
319
        return res;
320
}
321
#endif
322
 
323
struct tsf_stream_memory { const char* buffer; unsigned int total, pos; };
324
static int tsf_stream_memory_read(struct tsf_stream_memory* m, void* ptr, unsigned int size) { if (size > m->total - m->pos) size = m->total - m->pos; TSF_MEMCPY(ptr, m->buffer+m->pos, size); m->pos += size; return size; }
325
static int tsf_stream_memory_skip(struct tsf_stream_memory* m, unsigned int count) { if (m->pos + count > m->total) return 0; m->pos += count; return 1; }
326
TSFDEF tsf* tsf_load_memory(const void* buffer, int size)
327
{
328
        struct tsf_stream stream = { TSF_NULL, (int(*)(void*,void*,unsigned int))&tsf_stream_memory_read, (int(*)(void*,unsigned int))&tsf_stream_memory_skip };
329
        struct tsf_stream_memory f = { 0, 0, 0 };
330
        f.buffer = (const char*)buffer;
331
        f.total = size;
332
        stream.data = &f;
333
        return tsf_load(&stream);
334
}
335
 
336
enum { TSF_LOOPMODE_NONE, TSF_LOOPMODE_CONTINUOUS, TSF_LOOPMODE_SUSTAIN };
337
 
338
enum { TSF_SEGMENT_NONE, TSF_SEGMENT_DELAY, TSF_SEGMENT_ATTACK, TSF_SEGMENT_HOLD, TSF_SEGMENT_DECAY, TSF_SEGMENT_SUSTAIN, TSF_SEGMENT_RELEASE, TSF_SEGMENT_DONE };
339
 
340
struct tsf_hydra
341
{
342
        struct tsf_hydra_phdr *phdrs; struct tsf_hydra_pbag *pbags; struct tsf_hydra_pmod *pmods;
343
        struct tsf_hydra_pgen *pgens; struct tsf_hydra_inst *insts; struct tsf_hydra_ibag *ibags;
344
        struct tsf_hydra_imod *imods; struct tsf_hydra_igen *igens; struct tsf_hydra_shdr *shdrs;
345
        int phdrNum, pbagNum, pmodNum, pgenNum, instNum, ibagNum, imodNum, igenNum, shdrNum;
346
};
347
 
348
union tsf_hydra_genamount { struct { tsf_u8 lo, hi; } range; tsf_s16 shortAmount; tsf_u16 wordAmount; };
349
struct tsf_hydra_phdr { tsf_char20 presetName; tsf_u16 preset, bank, presetBagNdx; tsf_u32 library, genre, morphology; };
350
struct tsf_hydra_pbag { tsf_u16 genNdx, modNdx; };
351
struct tsf_hydra_pmod { tsf_u16 modSrcOper, modDestOper; tsf_s16 modAmount; tsf_u16 modAmtSrcOper, modTransOper; };
352
struct tsf_hydra_pgen { tsf_u16 genOper; union tsf_hydra_genamount genAmount; };
353
struct tsf_hydra_inst { tsf_char20 instName; tsf_u16 instBagNdx; };
354
struct tsf_hydra_ibag { tsf_u16 instGenNdx, instModNdx; };
355
struct tsf_hydra_imod { tsf_u16 modSrcOper, modDestOper; tsf_s16 modAmount; tsf_u16 modAmtSrcOper, modTransOper; };
356
struct tsf_hydra_igen { tsf_u16 genOper; union tsf_hydra_genamount genAmount; };
357
struct tsf_hydra_shdr { tsf_char20 sampleName; tsf_u32 start, end, startLoop, endLoop, sampleRate; tsf_u8 originalPitch; tsf_s8 pitchCorrection; tsf_u16 sampleLink, sampleType; };
358
 
359
#define TSFR(FIELD) stream->read(stream->data, &i->FIELD, sizeof(i->FIELD));
360
static void tsf_hydra_read_phdr(struct tsf_hydra_phdr* i, struct tsf_stream* stream) { TSFR(presetName) TSFR(preset) TSFR(bank) TSFR(presetBagNdx) TSFR(library) TSFR(genre) TSFR(morphology) }
361
static void tsf_hydra_read_pbag(struct tsf_hydra_pbag* i, struct tsf_stream* stream) { TSFR(genNdx) TSFR(modNdx) }
362
static void tsf_hydra_read_pmod(struct tsf_hydra_pmod* i, struct tsf_stream* stream) { TSFR(modSrcOper) TSFR(modDestOper) TSFR(modAmount) TSFR(modAmtSrcOper) TSFR(modTransOper) }
363
static void tsf_hydra_read_pgen(struct tsf_hydra_pgen* i, struct tsf_stream* stream) { TSFR(genOper) TSFR(genAmount) }
364
static void tsf_hydra_read_inst(struct tsf_hydra_inst* i, struct tsf_stream* stream) { TSFR(instName) TSFR(instBagNdx) }
365
static void tsf_hydra_read_ibag(struct tsf_hydra_ibag* i, struct tsf_stream* stream) { TSFR(instGenNdx) TSFR(instModNdx) }
366
static void tsf_hydra_read_imod(struct tsf_hydra_imod* i, struct tsf_stream* stream) { TSFR(modSrcOper) TSFR(modDestOper) TSFR(modAmount) TSFR(modAmtSrcOper) TSFR(modTransOper) }
367
static void tsf_hydra_read_igen(struct tsf_hydra_igen* i, struct tsf_stream* stream) { TSFR(genOper) TSFR(genAmount) }
368
static void tsf_hydra_read_shdr(struct tsf_hydra_shdr* i, struct tsf_stream* stream) { TSFR(sampleName) TSFR(start) TSFR(end) TSFR(startLoop) TSFR(endLoop) TSFR(sampleRate) TSFR(originalPitch) TSFR(pitchCorrection) TSFR(sampleLink) TSFR(sampleType) }
369
#undef TSFR
370
 
371
struct tsf_riffchunk { tsf_fourcc id; tsf_u32 size; };
372
struct tsf_envelope { float delay, attack, hold, decay, sustain, release, keynumToHold, keynumToDecay; };
373
struct tsf_voice_envelope { float level, slope; int samplesUntilNextSegment; short segment, midiVelocity; struct tsf_envelope parameters; TSF_BOOL segmentIsExponential, isAmpEnv; };
374
struct tsf_voice_lowpass { double QInv, a0, a1, b1, b2, z1, z2; TSF_BOOL active; };
375
struct tsf_voice_lfo { int samplesUntil; float level, delta; };
376
 
377
struct tsf_region
378
{
379
        int loop_mode;
380
        unsigned int sample_rate;
381
        unsigned char lokey, hikey, lovel, hivel;
382
        unsigned int group, offset, end, loop_start, loop_end;
383
        int transpose, tune, pitch_keycenter, pitch_keytrack;
384
        float attenuation, pan;
385
        struct tsf_envelope ampenv, modenv;
386
        int initialFilterQ, initialFilterFc;
387
        int modEnvToPitch, modEnvToFilterFc, modLfoToFilterFc, modLfoToVolume;
388
        float delayModLFO;
389
        int freqModLFO, modLfoToPitch;
390
        float delayVibLFO;
391
        int freqVibLFO, vibLfoToPitch;
392
};
393
 
394
struct tsf_preset
395
{
396
        tsf_char20 presetName;
397
        tsf_u16 preset, bank;
398
        struct tsf_region* regions;
399
        int regionNum;
400
};
401
 
402
struct tsf_voice
403
{
404
        int playingPreset, playingKey, playingChannel;
405
        struct tsf_region* region;
406
        double pitchInputTimecents, pitchOutputFactor;
407
        double sourceSamplePosition;
408
        float  noteGainDB, panFactorLeft, panFactorRight;
409
        unsigned int playIndex, loopStart, loopEnd;
410
        struct tsf_voice_envelope ampenv, modenv;
411
        struct tsf_voice_lowpass lowpass;
412
        struct tsf_voice_lfo modlfo, viblfo;
413
};
414
 
415
struct tsf_channel
416
{
417
        unsigned short presetIndex, bank, pitchWheel, midiPan, midiVolume, midiExpression, midiRPN, midiData;
418
        float panOffset, gainDB, pitchRange, tuning;
419
};
420
 
421
struct tsf_channels
422
{
423
        void (*setupVoice)(tsf* f, struct tsf_voice* voice);
424
        struct tsf_channel* channels;
425
        int channelNum, activeChannel;
426
};
427
 
428
static double tsf_timecents2Secsd(double timecents) { return TSF_POW(2.0, timecents / 1200.0); }
429
static float tsf_timecents2Secsf(float timecents) { return TSF_POWF(2.0f, timecents / 1200.0f); }
430
static float tsf_cents2Hertz(float cents) { return 8.176f * TSF_POWF(2.0f, cents / 1200.0f); }
431
static float tsf_decibelsToGain(float db) { return (db > -100.f ? TSF_POWF(10.0f, db * 0.05f) : 0); }
432
static float tsf_gainToDecibels(float gain) { return (gain <= .00001f ? -100.f : (float)(20.0 * TSF_LOG10(gain))); }
433
 
434
static TSF_BOOL tsf_riffchunk_read(struct tsf_riffchunk* parent, struct tsf_riffchunk* chunk, struct tsf_stream* stream)
435
{
436
        TSF_BOOL IsRiff, IsList;
437
        if (parent && sizeof(tsf_fourcc) + sizeof(tsf_u32) > parent->size) return TSF_FALSE;
438
        if (!stream->read(stream->data, &chunk->id, sizeof(tsf_fourcc)) || *chunk->id <= ' ' || *chunk->id >= 'z') return TSF_FALSE;
439
        if (!stream->read(stream->data, &chunk->size, sizeof(tsf_u32))) return TSF_FALSE;
440
        if (parent && sizeof(tsf_fourcc) + sizeof(tsf_u32) + chunk->size > parent->size) return TSF_FALSE;
441
        if (parent) parent->size -= sizeof(tsf_fourcc) + sizeof(tsf_u32) + chunk->size;
442
        IsRiff = TSF_FourCCEquals(chunk->id, "RIFF"), IsList = TSF_FourCCEquals(chunk->id, "LIST");
443
        if (IsRiff && parent) return TSF_FALSE; //not allowed
444
        if (!IsRiff && !IsList) return TSF_TRUE; //custom type without sub type
445
        if (!stream->read(stream->data, &chunk->id, sizeof(tsf_fourcc)) || *chunk->id <= ' ' || *chunk->id >= 'z') return TSF_FALSE;
446
        chunk->size -= sizeof(tsf_fourcc);
447
        return TSF_TRUE;
448
}
449
 
450
static void tsf_region_clear(struct tsf_region* i, TSF_BOOL for_relative)
451
{
452
        TSF_MEMSET(i, 0, sizeof(struct tsf_region));
453
        i->hikey = i->hivel = 127;
454
        i->pitch_keycenter = 60; // C4
455
        if (for_relative) return;
456
 
457
        i->pitch_keytrack = 100;
458
 
459
        i->pitch_keycenter = -1;
460
 
461
        // SF2 defaults in timecents.
462
        i->ampenv.delay = i->ampenv.attack = i->ampenv.hold = i->ampenv.decay = i->ampenv.release = -12000.0f;
463
        i->modenv.delay = i->modenv.attack = i->modenv.hold = i->modenv.decay = i->modenv.release = -12000.0f;
464
 
465
        i->initialFilterFc = 13500;
466
 
467
        i->delayModLFO = -12000.0f;
468
        i->delayVibLFO = -12000.0f;
469
}
470
 
471
static void tsf_region_operator(struct tsf_region* region, tsf_u16 genOper, union tsf_hydra_genamount* amount)
472
{
473
        enum
474
        {
475
                StartAddrsOffset, EndAddrsOffset, StartloopAddrsOffset, EndloopAddrsOffset, StartAddrsCoarseOffset, ModLfoToPitch, VibLfoToPitch, ModEnvToPitch,
476
                InitialFilterFc, InitialFilterQ, ModLfoToFilterFc, ModEnvToFilterFc, EndAddrsCoarseOffset, ModLfoToVolume, Unused1, ChorusEffectsSend,
477
                ReverbEffectsSend, Pan, Unused2, Unused3, Unused4, DelayModLFO, FreqModLFO, DelayVibLFO, FreqVibLFO, DelayModEnv, AttackModEnv, HoldModEnv,
478
                DecayModEnv, SustainModEnv, ReleaseModEnv, KeynumToModEnvHold, KeynumToModEnvDecay, DelayVolEnv, AttackVolEnv, HoldVolEnv, DecayVolEnv,
479
                SustainVolEnv, ReleaseVolEnv, KeynumToVolEnvHold, KeynumToVolEnvDecay, Instrument, Reserved1, KeyRange, VelRange, StartloopAddrsCoarseOffset,
480
                Keynum, Velocity, InitialAttenuation, Reserved2, EndloopAddrsCoarseOffset, CoarseTune, FineTune, SampleID, SampleModes, Reserved3, ScaleTuning,
481
                ExclusiveClass, OverridingRootKey, Unused5, EndOper
482
        };
483
        switch (genOper)
484
        {
485
                case StartAddrsOffset:           region->offset += amount->shortAmount; break;
486
                case EndAddrsOffset:             region->end += amount->shortAmount; break;
487
                case StartloopAddrsOffset:       region->loop_start += amount->shortAmount; break;
488
                case EndloopAddrsOffset:         region->loop_end += amount->shortAmount; break;
489
                case StartAddrsCoarseOffset:     region->offset += amount->shortAmount * 32768; break;
490
                case ModLfoToPitch:              region->modLfoToPitch = amount->shortAmount; break;
491
                case VibLfoToPitch:              region->vibLfoToPitch = amount->shortAmount; break;
492
                case ModEnvToPitch:              region->modEnvToPitch = amount->shortAmount; break;
493
                case InitialFilterFc:            region->initialFilterFc = amount->shortAmount; break;
494
                case InitialFilterQ:             region->initialFilterQ = amount->shortAmount; break;
495
                case ModLfoToFilterFc:           region->modLfoToFilterFc = amount->shortAmount; break;
496
                case ModEnvToFilterFc:           region->modEnvToFilterFc = amount->shortAmount; break;
497
                case EndAddrsCoarseOffset:       region->end += amount->shortAmount * 32768; break;
498
                case ModLfoToVolume:             region->modLfoToVolume = amount->shortAmount; break;
499
                case Pan:                        region->pan = amount->shortAmount / 1000.0f; break;
500
                case DelayModLFO:                region->delayModLFO = amount->shortAmount; break;
501
                case FreqModLFO:                 region->freqModLFO = amount->shortAmount; break;
502
                case DelayVibLFO:                region->delayVibLFO = amount->shortAmount; break;
503
                case FreqVibLFO:                 region->freqVibLFO = amount->shortAmount; break;
504
                case DelayModEnv:                region->modenv.delay = amount->shortAmount; break;
505
                case AttackModEnv:               region->modenv.attack = amount->shortAmount; break;
506
                case HoldModEnv:                 region->modenv.hold = amount->shortAmount; break;
507
                case DecayModEnv:                region->modenv.decay = amount->shortAmount; break;
508
                case SustainModEnv:              region->modenv.sustain = amount->shortAmount; break;
509
                case ReleaseModEnv:              region->modenv.release = amount->shortAmount; break;
510
                case KeynumToModEnvHold:         region->modenv.keynumToHold = amount->shortAmount; break;
511
                case KeynumToModEnvDecay:        region->modenv.keynumToDecay = amount->shortAmount; break;
512
                case DelayVolEnv:                region->ampenv.delay = amount->shortAmount; break;
513
                case AttackVolEnv:               region->ampenv.attack = amount->shortAmount; break;
514
                case HoldVolEnv:                 region->ampenv.hold = amount->shortAmount; break;
515
                case DecayVolEnv:                region->ampenv.decay = amount->shortAmount; break;
516
                case SustainVolEnv:              region->ampenv.sustain = amount->shortAmount; break;
517
                case ReleaseVolEnv:              region->ampenv.release = amount->shortAmount; break;
518
                case KeynumToVolEnvHold:         region->ampenv.keynumToHold = amount->shortAmount; break;
519
                case KeynumToVolEnvDecay:        region->ampenv.keynumToDecay = amount->shortAmount; break;
520
                case KeyRange:                   region->lokey = amount->range.lo; region->hikey = amount->range.hi; break;
521
                case VelRange:                   region->lovel = amount->range.lo; region->hivel = amount->range.hi; break;
522
                case StartloopAddrsCoarseOffset: region->loop_start += amount->shortAmount * 32768; break;
523
                case InitialAttenuation:         region->attenuation += amount->shortAmount * 0.1f; break;
524
                case EndloopAddrsCoarseOffset:   region->loop_end += amount->shortAmount * 32768; break;
525
                case CoarseTune:                 region->transpose += amount->shortAmount; break;
526
                case FineTune:                   region->tune += amount->shortAmount; break;
527
                case SampleModes:                region->loop_mode = ((amount->wordAmount&3) == 3 ? TSF_LOOPMODE_SUSTAIN : ((amount->wordAmount&3) == 1 ? TSF_LOOPMODE_CONTINUOUS : TSF_LOOPMODE_NONE)); break;
528
                case ScaleTuning:                region->pitch_keytrack = amount->shortAmount; break;
529
                case ExclusiveClass:             region->group = amount->wordAmount; break;
530
                case OverridingRootKey:          region->pitch_keycenter = amount->shortAmount; break;
531
                //case gen_endOper: break; // Ignore.
532
                //default: addUnsupportedOpcode(generator_name);
533
        }
534
}
535
 
536
static void tsf_region_envtosecs(struct tsf_envelope* p, TSF_BOOL sustainIsGain)
537
{
538
        // EG times need to be converted from timecents to seconds.
539
        // Pin very short EG segments.  Timecents don't get to zero, and our EG is
540
        // happier with zero values.
541
        p->delay   = (p->delay   < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->delay));
542
        p->attack  = (p->attack  < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->attack));
543
        p->release = (p->release < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->release));
544
 
545
        // If we have dynamic hold or decay times depending on key number we need
546
        // to keep the values in timecents so we can calculate it during startNote
547
        if (!p->keynumToHold)  p->hold  = (p->hold  < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->hold));
548
        if (!p->keynumToDecay) p->decay = (p->decay < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->decay));
549
 
550
        if (p->sustain < 0.0f) p->sustain = 0.0f;
551
        else if (sustainIsGain) p->sustain = tsf_decibelsToGain(-p->sustain / 10.0f);
552
        else p->sustain = 1.0f - (p->sustain / 1000.0f);
8754 terminx 553
 
554
        p->sustain = clamp(p->sustain, 0, 1.f);
8752 terminx 555
}
556
 
557
static void tsf_load_presets(tsf* res, struct tsf_hydra *hydra, unsigned int fontSampleCount)
558
{
559
        enum { GenInstrument = 41, GenKeyRange = 43, GenVelRange = 44, GenSampleID = 53 };
560
        // Read each preset.
561
        struct tsf_hydra_phdr *pphdr, *pphdrMax;
562
        for (pphdr = hydra->phdrs, pphdrMax = pphdr + hydra->phdrNum - 1; pphdr != pphdrMax; pphdr++)
563
        {
564
                int sortedIndex = 0, region_index = 0;
565
                struct tsf_hydra_phdr *otherphdr;
566
                struct tsf_preset* preset;
567
                struct tsf_hydra_pbag *ppbag, *ppbagEnd;
568
                struct tsf_region globalRegion;
569
                for (otherphdr = hydra->phdrs; otherphdr != pphdrMax; otherphdr++)
570
                {
571
                        if (otherphdr == pphdr || otherphdr->bank > pphdr->bank) continue;
572
                        else if (otherphdr->bank < pphdr->bank) sortedIndex++;
573
                        else if (otherphdr->preset > pphdr->preset) continue;
574
                        else if (otherphdr->preset < pphdr->preset) sortedIndex++;
575
                        else if (otherphdr < pphdr) sortedIndex++;
576
                }
577
 
578
                preset = &res->presets[sortedIndex];
579
                TSF_MEMCPY(preset->presetName, pphdr->presetName, sizeof(preset->presetName));
580
                preset->presetName[sizeof(preset->presetName)-1] = '\0'; //should be zero terminated in source file but make sure
581
                preset->bank = pphdr->bank;
582
                preset->preset = pphdr->preset;
583
                preset->regionNum = 0;
584
 
585
                //count regions covered by this preset
586
                for (ppbag = hydra->pbags + pphdr->presetBagNdx, ppbagEnd = hydra->pbags + pphdr[1].presetBagNdx; ppbag != ppbagEnd; ppbag++)
587
                {
588
                        unsigned char plokey = 0, phikey = 127, plovel = 0, phivel = 127;
589
                        struct tsf_hydra_pgen *ppgen, *ppgenEnd; struct tsf_hydra_inst *pinst; struct tsf_hydra_ibag *pibag, *pibagEnd; struct tsf_hydra_igen *pigen, *pigenEnd;
590
                        for (ppgen = hydra->pgens + ppbag->genNdx, ppgenEnd = hydra->pgens + ppbag[1].genNdx; ppgen != ppgenEnd; ppgen++)
591
                        {
592
                                if (ppgen->genOper == GenKeyRange) { plokey = ppgen->genAmount.range.lo; phikey = ppgen->genAmount.range.hi; continue; }
593
                                if (ppgen->genOper == GenVelRange) { plovel = ppgen->genAmount.range.lo; phivel = ppgen->genAmount.range.hi; continue; }
594
                                if (ppgen->genOper != GenInstrument) continue;
595
                                if (ppgen->genAmount.wordAmount >= hydra->instNum) continue;
596
                                pinst = hydra->insts + ppgen->genAmount.wordAmount;
597
                                for (pibag = hydra->ibags + pinst->instBagNdx, pibagEnd = hydra->ibags + pinst[1].instBagNdx; pibag != pibagEnd; pibag++)
598
                                {
599
                                        unsigned char ilokey = 0, ihikey = 127, ilovel = 0, ihivel = 127;
600
                                        for (pigen = hydra->igens + pibag->instGenNdx, pigenEnd = hydra->igens + pibag[1].instGenNdx; pigen != pigenEnd; pigen++)
601
                                        {
602
                                                if (pigen->genOper == GenKeyRange) { ilokey = pigen->genAmount.range.lo; ihikey = pigen->genAmount.range.hi; continue; }
603
                                                if (pigen->genOper == GenVelRange) { ilovel = pigen->genAmount.range.lo; ihivel = pigen->genAmount.range.hi; continue; }
604
                                                if (pigen->genOper == GenSampleID && ihikey >= plokey && ilokey <= phikey && ihivel >= plovel && ilovel <= phivel) preset->regionNum++;
605
                                        }
606
                                }
607
                        }
608
                }
609
 
610
                preset->regions = (struct tsf_region*)TSF_MALLOC(preset->regionNum * sizeof(struct tsf_region));
611
                tsf_region_clear(&globalRegion, TSF_TRUE);
612
 
613
                // Zones.
614
                for (ppbag = hydra->pbags + pphdr->presetBagNdx, ppbagEnd = hydra->pbags + pphdr[1].presetBagNdx; ppbag != ppbagEnd; ppbag++)
615
                {
616
                        struct tsf_hydra_pgen *ppgen, *ppgenEnd; struct tsf_hydra_inst *pinst; struct tsf_hydra_ibag *pibag, *pibagEnd; struct tsf_hydra_igen *pigen, *pigenEnd;
617
                        struct tsf_region presetRegion = globalRegion;
618
                        int hadGenInstrument = 0;
619
 
620
                        // Generators.
621
                        for (ppgen = hydra->pgens + ppbag->genNdx, ppgenEnd = hydra->pgens + ppbag[1].genNdx; ppgen != ppgenEnd; ppgen++)
622
                        {
623
                                // Instrument.
624
                                if (ppgen->genOper == GenInstrument)
625
                                {
626
                                        struct tsf_region instRegion;
627
                                        tsf_u16 whichInst = ppgen->genAmount.wordAmount;
628
                                        if (whichInst >= hydra->instNum) continue;
629
 
630
                                        tsf_region_clear(&instRegion, TSF_FALSE);
631
                                        pinst = &hydra->insts[whichInst];
632
                                        for (pibag = hydra->ibags + pinst->instBagNdx, pibagEnd = hydra->ibags + pinst[1].instBagNdx; pibag != pibagEnd; pibag++)
633
                                        {
634
                                                // Generators.
635
                                                struct tsf_region zoneRegion = instRegion;
636
                                                int hadSampleID = 0;
637
                                                for (pigen = hydra->igens + pibag->instGenNdx, pigenEnd = hydra->igens + pibag[1].instGenNdx; pigen != pigenEnd; pigen++)
638
                                                {
639
                                                        if (pigen->genOper == GenSampleID)
640
                                                        {
641
                                                                struct tsf_hydra_shdr* pshdr;
642
 
643
                                                                //preset region key and vel ranges are a filter for the zone regions
644
                                                                if (zoneRegion.hikey < presetRegion.lokey || zoneRegion.lokey > presetRegion.hikey) continue;
645
                                                                if (zoneRegion.hivel < presetRegion.lovel || zoneRegion.lovel > presetRegion.hivel) continue;
646
                                                                if (presetRegion.lokey > zoneRegion.lokey) zoneRegion.lokey = presetRegion.lokey;
647
                                                                if (presetRegion.hikey < zoneRegion.hikey) zoneRegion.hikey = presetRegion.hikey;
648
                                                                if (presetRegion.lovel > zoneRegion.lovel) zoneRegion.lovel = presetRegion.lovel;
649
                                                                if (presetRegion.hivel < zoneRegion.hivel) zoneRegion.hivel = presetRegion.hivel;
650
 
651
                                                                //sum regions
652
                                                                zoneRegion.offset += presetRegion.offset;
653
                                                                zoneRegion.end += presetRegion.end;
654
                                                                zoneRegion.loop_start += presetRegion.loop_start;
655
                                                                zoneRegion.loop_end += presetRegion.loop_end;
656
                                                                zoneRegion.transpose += presetRegion.transpose;
657
                                                                zoneRegion.tune += presetRegion.tune;
658
                                                                zoneRegion.pitch_keytrack += presetRegion.pitch_keytrack;
659
                                                                zoneRegion.attenuation += presetRegion.attenuation;
660
                                                                zoneRegion.pan += presetRegion.pan;
661
                                                                zoneRegion.ampenv.delay += presetRegion.ampenv.delay;
662
                                                                zoneRegion.ampenv.attack += presetRegion.ampenv.attack;
663
                                                                zoneRegion.ampenv.hold += presetRegion.ampenv.hold;
664
                                                                zoneRegion.ampenv.decay += presetRegion.ampenv.decay;
665
                                                                zoneRegion.ampenv.sustain += presetRegion.ampenv.sustain;
666
                                                                zoneRegion.ampenv.release += presetRegion.ampenv.release;
667
                                                                zoneRegion.modenv.delay += presetRegion.modenv.delay;
668
                                                                zoneRegion.modenv.attack += presetRegion.modenv.attack;
669
                                                                zoneRegion.modenv.hold += presetRegion.modenv.hold;
670
                                                                zoneRegion.modenv.decay += presetRegion.modenv.decay;
671
                                                                zoneRegion.modenv.sustain += presetRegion.modenv.sustain;
672
                                                                zoneRegion.modenv.release += presetRegion.modenv.release;
673
                                                                zoneRegion.initialFilterQ += presetRegion.initialFilterQ;
674
                                                                zoneRegion.initialFilterFc += presetRegion.initialFilterFc;
675
                                                                zoneRegion.modEnvToPitch += presetRegion.modEnvToPitch;
676
                                                                zoneRegion.modEnvToFilterFc += presetRegion.modEnvToFilterFc;
677
                                                                zoneRegion.delayModLFO += presetRegion.delayModLFO;
678
                                                                zoneRegion.freqModLFO += presetRegion.freqModLFO;
679
                                                                zoneRegion.modLfoToPitch += presetRegion.modLfoToPitch;
680
                                                                zoneRegion.modLfoToFilterFc += presetRegion.modLfoToFilterFc;
681
                                                                zoneRegion.modLfoToVolume += presetRegion.modLfoToVolume;
682
                                                                zoneRegion.delayVibLFO += presetRegion.delayVibLFO;
683
                                                                zoneRegion.freqVibLFO += presetRegion.freqVibLFO;
684
                                                                zoneRegion.vibLfoToPitch += presetRegion.vibLfoToPitch;
685
 
686
                                                                // EG times need to be converted from timecents to seconds.
687
                                                                tsf_region_envtosecs(&zoneRegion.ampenv, TSF_TRUE);
688
                                                                tsf_region_envtosecs(&zoneRegion.modenv, TSF_FALSE);
689
 
690
                                                                // LFO times need to be converted from timecents to seconds.
691
                                                                zoneRegion.delayModLFO = (zoneRegion.delayModLFO < -11950.0f ? 0.0f : tsf_timecents2Secsf(zoneRegion.delayModLFO));
692
                                                                zoneRegion.delayVibLFO = (zoneRegion.delayVibLFO < -11950.0f ? 0.0f : tsf_timecents2Secsf(zoneRegion.delayVibLFO));
693
 
694
                                                                // Pin values to their ranges.
695
                                                                if (zoneRegion.pan < -0.5f) zoneRegion.pan = -0.5f;
696
                                                                else if (zoneRegion.pan > 0.5f) zoneRegion.pan = 0.5f;
697
                                                                if (zoneRegion.initialFilterQ < 1500 || zoneRegion.initialFilterQ > 13500) zoneRegion.initialFilterQ = 0;
698
 
699
                                                                pshdr = &hydra->shdrs[pigen->genAmount.wordAmount];
700
                                                                zoneRegion.offset += pshdr->start;
701
                                                                zoneRegion.end += pshdr->end;
702
                                                                zoneRegion.loop_start += pshdr->startLoop;
703
                                                                zoneRegion.loop_end += pshdr->endLoop;
704
                                                                if (pshdr->endLoop > 0) zoneRegion.loop_end -= 1;
705
                                                                if (zoneRegion.pitch_keycenter == -1) zoneRegion.pitch_keycenter = pshdr->originalPitch;
706
                                                                zoneRegion.tune += pshdr->pitchCorrection;
707
                                                                zoneRegion.sample_rate = pshdr->sampleRate;
708
                                                                if (zoneRegion.end && zoneRegion.end < fontSampleCount) zoneRegion.end++;
709
                                                                else zoneRegion.end = fontSampleCount;
710
 
711
                                                                preset->regions[region_index] = zoneRegion;
712
                                                                region_index++;
713
                                                                hadSampleID = 1;
714
                                                        }
715
                                                        else tsf_region_operator(&zoneRegion, pigen->genOper, &pigen->genAmount);
716
                                                }
717
 
718
                                                // Handle instrument's global zone.
719
                                                if (pibag == hydra->ibags + pinst->instBagNdx && !hadSampleID)
720
                                                        instRegion = zoneRegion;
721
 
722
                                                // Modulators (TODO)
723
                                                //if (ibag->instModNdx < ibag[1].instModNdx) addUnsupportedOpcode("any modulator");
724
                                        }
725
                                        hadGenInstrument = 1;
726
                                }
727
                                else tsf_region_operator(&presetRegion, ppgen->genOper, &ppgen->genAmount);
728
                        }
729
 
730
                        // Modulators (TODO)
731
                        //if (pbag->modNdx < pbag[1].modNdx) addUnsupportedOpcode("any modulator");
732
 
733
                        // Handle preset's global zone.
734
                        if (ppbag == hydra->pbags + pphdr->presetBagNdx && !hadGenInstrument)
735
                                globalRegion = presetRegion;
736
                }
737
        }
738
}
739
 
740
static void tsf_load_samples(float** fontSamples, unsigned int* fontSampleCount, struct tsf_riffchunk *chunkSmpl, struct tsf_stream* stream)
741
{
742
        // Read sample data into float format buffer.
743
        float* out; unsigned int samplesLeft, samplesToRead, samplesToConvert;
744
        samplesLeft = *fontSampleCount = chunkSmpl->size / sizeof(short);
745
        out = *fontSamples = (float*)TSF_MALLOC(samplesLeft * sizeof(float));
746
        for (; samplesLeft; samplesLeft -= samplesToRead)
747
        {
748
                short sampleBuffer[1024], *in = sampleBuffer;;
749
                samplesToRead = (samplesLeft > 1024 ? 1024 : samplesLeft);
750
                stream->read(stream->data, sampleBuffer, samplesToRead * sizeof(short));
751
 
752
                // Convert from signed 16-bit to float.
753
                for (samplesToConvert = samplesToRead; samplesToConvert > 0; --samplesToConvert)
754
                        // If we ever need to compile for big-endian platforms, we'll need to byte-swap here.
755
                        *out++ = (float)(*in++ / 32767.0);
756
        }
757
}
758
 
759
static void tsf_voice_envelope_nextsegment(struct tsf_voice_envelope* e, short active_segment, float outSampleRate)
760
{
761
        switch (active_segment)
762
        {
763
                case TSF_SEGMENT_NONE:
764
                        e->samplesUntilNextSegment = (int)(e->parameters.delay * outSampleRate);
765
                        if (e->samplesUntilNextSegment > 0)
766
                        {
767
                                e->segment = TSF_SEGMENT_DELAY;
768
                                e->segmentIsExponential = TSF_FALSE;
769
                                e->level = 0.0;
770
                                e->slope = 0.0;
771
                                return;
772
                        }
773
                        /* fall through */
774
                case TSF_SEGMENT_DELAY:
775
                        e->samplesUntilNextSegment = (int)(e->parameters.attack * outSampleRate);
776
                        if (e->samplesUntilNextSegment > 0)
777
                        {
778
                                if (!e->isAmpEnv)
779
                                {
780
                                        //mod env attack duration scales with velocity (velocity of 1 is full duration, max velocity is 0.125 times duration)
781
                                        e->samplesUntilNextSegment = (int)(e->parameters.attack * ((145 - e->midiVelocity) / 144.0f) * outSampleRate);
782
                                }
783
                                e->segment = TSF_SEGMENT_ATTACK;
784
                                e->segmentIsExponential = TSF_FALSE;
785
                                e->level = 0.0f;
786
                                e->slope = 1.0f / e->samplesUntilNextSegment;
787
                                return;
788
                        }
789
                        /* fall through */
790
                case TSF_SEGMENT_ATTACK:
791
                        e->samplesUntilNextSegment = (int)(e->parameters.hold * outSampleRate);
792
                        if (e->samplesUntilNextSegment > 0)
793
                        {
794
                                e->segment = TSF_SEGMENT_HOLD;
795
                                e->segmentIsExponential = TSF_FALSE;
796
                                e->level = 1.0f;
797
                                e->slope = 0.0f;
798
                                return;
799
                        }
800
                        /* fall through */
801
                case TSF_SEGMENT_HOLD:
802
                        e->samplesUntilNextSegment = (int)(e->parameters.decay * outSampleRate);
803
                        if (e->samplesUntilNextSegment > 0)
804
                        {
805
                                e->segment = TSF_SEGMENT_DECAY;
806
                                e->level = 1.0f;
807
                                if (e->isAmpEnv)
808
                                {
809
                                        // I don't truly understand this; just following what LinuxSampler does.
810
                                        float mysterySlope = -9.226f / e->samplesUntilNextSegment;
811
                                        e->slope = TSF_EXPF(mysterySlope);
812
                                        e->segmentIsExponential = TSF_TRUE;
813
                                        if (e->parameters.sustain > 0.0f)
814
                                        {
815
                                                // Again, this is following LinuxSampler's example, which is similar to
816
                                                // SF2-style decay, where "decay" specifies the time it would take to
817
                                                // get to zero, not to the sustain level.  The SFZ spec is not that
818
                                                // specific about what "decay" means, so perhaps it's really supposed
819
                                                // to specify the time to reach the sustain level.
820
                                                e->samplesUntilNextSegment = (int)(TSF_LOG(e->parameters.sustain) / mysterySlope);
821
                                        }
822
                                }
823
                                else
824
                                {
825
                                        e->slope = -1.0f / e->samplesUntilNextSegment;
826
                                        e->samplesUntilNextSegment = (int)(e->parameters.decay * (1.0f - e->parameters.sustain) * outSampleRate);
827
                                        e->segmentIsExponential = TSF_FALSE;
828
                                }
829
                                return;
830
                        }
831
                        /* fall through */
832
                case TSF_SEGMENT_DECAY:
833
                        e->segment = TSF_SEGMENT_SUSTAIN;
834
                        e->level = e->parameters.sustain;
835
                        e->slope = 0.0f;
836
                        e->samplesUntilNextSegment = 0x7FFFFFFF;
837
                        e->segmentIsExponential = TSF_FALSE;
838
                        return;
839
                case TSF_SEGMENT_SUSTAIN:
840
                        e->segment = TSF_SEGMENT_RELEASE;
841
                        e->samplesUntilNextSegment = (int)((e->parameters.release <= 0 ? TSF_FASTRELEASETIME : e->parameters.release) * outSampleRate);
842
                        if (e->isAmpEnv)
843
                        {
844
                                // I don't truly understand this; just following what LinuxSampler does.
845
                                float mysterySlope = -9.226f / e->samplesUntilNextSegment;
846
                                e->slope = TSF_EXPF(mysterySlope);
847
                                e->segmentIsExponential = TSF_TRUE;
848
                        }
849
                        else
850
                        {
851
                                e->slope = -e->level / e->samplesUntilNextSegment;
852
                                e->segmentIsExponential = TSF_FALSE;
853
                        }
854
                        return;
855
                case TSF_SEGMENT_RELEASE:
856
                default:
857
                        e->segment = TSF_SEGMENT_DONE;
858
                        e->segmentIsExponential = TSF_FALSE;
859
                        e->level = e->slope = 0.0f;
860
                        e->samplesUntilNextSegment = 0x7FFFFFF;
861
        }
862
}
863
 
864
static void tsf_voice_envelope_setup(struct tsf_voice_envelope* e, struct tsf_envelope* new_parameters, int midiNoteNumber, short midiVelocity, TSF_BOOL isAmpEnv, float outSampleRate)
865
{
866
        e->parameters = *new_parameters;
867
        if (e->parameters.keynumToHold)
868
        {
869
                e->parameters.hold += e->parameters.keynumToHold * (60.0f - midiNoteNumber);
870
                e->parameters.hold = (e->parameters.hold < -10000.0f ? 0.0f : tsf_timecents2Secsf(e->parameters.hold));
871
        }
872
        if (e->parameters.keynumToDecay)
873
        {
874
                e->parameters.decay += e->parameters.keynumToDecay * (60.0f - midiNoteNumber);
875
                e->parameters.decay = (e->parameters.decay < -10000.0f ? 0.0f : tsf_timecents2Secsf(e->parameters.decay));
876
        }
877
        e->midiVelocity = midiVelocity;
878
        e->isAmpEnv = isAmpEnv;
879
        tsf_voice_envelope_nextsegment(e, TSF_SEGMENT_NONE, outSampleRate);
880
}
881
 
882
static void tsf_voice_envelope_process(struct tsf_voice_envelope* e, int numSamples, float outSampleRate)
883
{
884
        if (e->slope)
885
        {
886
                if (e->segmentIsExponential) e->level *= TSF_POWF(e->slope, (float)numSamples);
887
                else e->level += (e->slope * numSamples);
888
        }
889
        if ((e->samplesUntilNextSegment -= numSamples) <= 0)
890
                tsf_voice_envelope_nextsegment(e, e->segment, outSampleRate);
891
}
892
 
893
static void tsf_voice_lowpass_setup(struct tsf_voice_lowpass* e, float Fc)
894
{
895
        // Lowpass filter from http://www.earlevel.com/main/2012/11/26/biquad-c-source-code/
896
        double K = TSF_TAN(TSF_PI * Fc), KK = K * K;
897
        double norm = 1 / (1 + K * e->QInv + KK);
898
        e->a0 = KK * norm;
899
        e->a1 = 2 * e->a0;
900
        e->b1 = 2 * (KK - 1) * norm;
901
        e->b2 = (1 - K * e->QInv + KK) * norm;
902
}
903
 
904
static float tsf_voice_lowpass_process(struct tsf_voice_lowpass* e, double In)
905
{
906
        double Out = In * e->a0 + e->z1; e->z1 = In * e->a1 + e->z2 - e->b1 * Out; e->z2 = In * e->a0 - e->b2 * Out; return (float)Out;
907
}
908
 
909
static void tsf_voice_lfo_setup(struct tsf_voice_lfo* e, float delay, int freqCents, float outSampleRate)
910
{
911
        e->samplesUntil = (int)(delay * outSampleRate);
912
        e->delta = (4.0f * tsf_cents2Hertz((float)freqCents) / outSampleRate);
913
        e->level = 0;
914
}
915
 
916
static void tsf_voice_lfo_process(struct tsf_voice_lfo* e, int blockSamples)
917
{
918
        if (e->samplesUntil > blockSamples) { e->samplesUntil -= blockSamples; return; }
919
        e->level += e->delta * blockSamples;
920
        if      (e->level >  1.0f) { e->delta = -e->delta; e->level =  2.0f - e->level; }
921
        else if (e->level < -1.0f) { e->delta = -e->delta; e->level = -2.0f - e->level; }
922
}
923
 
924
static void tsf_voice_kill(struct tsf_voice* v)
925
{
926
        v->playingPreset = -1;
927
}
928
 
929
static void tsf_voice_end(struct tsf_voice* v, float outSampleRate)
930
{
931
        tsf_voice_envelope_nextsegment(&v->ampenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
932
        tsf_voice_envelope_nextsegment(&v->modenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
933
        if (v->region->loop_mode == TSF_LOOPMODE_SUSTAIN)
934
        {
935
                // Continue playing, but stop looping.
936
                v->loopEnd = v->loopStart;
937
        }
938
}
939
 
940
static void tsf_voice_endquick(struct tsf_voice* v, float outSampleRate)
941
{
942
        v->ampenv.parameters.release = 0.0f; tsf_voice_envelope_nextsegment(&v->ampenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
943
        v->modenv.parameters.release = 0.0f; tsf_voice_envelope_nextsegment(&v->modenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
944
}
945
 
946
static void tsf_voice_calcpitchratio(struct tsf_voice* v, float pitchShift, float outSampleRate)
947
{
948
        double note = v->playingKey + v->region->transpose + v->region->tune / 100.0;
949
        double adjustedPitch = v->region->pitch_keycenter + (note - v->region->pitch_keycenter) * (v->region->pitch_keytrack / 100.0);
950
        if (pitchShift) adjustedPitch += pitchShift;
951
        v->pitchInputTimecents = adjustedPitch * 100.0;
952
        v->pitchOutputFactor = v->region->sample_rate / (tsf_timecents2Secsd(v->region->pitch_keycenter * 100.0) * outSampleRate);
953
}
954
 
955
static void tsf_voice_render(tsf* f, struct tsf_voice* v, float* outputBuffer, int numSamples)
956
{
957
        struct tsf_region* region = v->region;
958
        float* input = f->fontSamples;
959
        float* outL = outputBuffer;
960
        float* outR = (f->outputmode == TSF_STEREO_UNWEAVED ? outL + numSamples : TSF_NULL);
961
 
962
        // Cache some values, to give them at least some chance of ending up in registers.
963
        TSF_BOOL updateModEnv = (region->modEnvToPitch || region->modEnvToFilterFc);
964
        TSF_BOOL updateModLFO = (v->modlfo.delta && (region->modLfoToPitch || region->modLfoToFilterFc || region->modLfoToVolume));
965
        TSF_BOOL updateVibLFO = (v->viblfo.delta && (region->vibLfoToPitch));
966
        TSF_BOOL isLooping    = (v->loopStart < v->loopEnd);
967
        unsigned int tmpLoopStart = v->loopStart, tmpLoopEnd = v->loopEnd;
968
        double tmpSampleEndDbl = (double)region->end, tmpLoopEndDbl = (double)tmpLoopEnd + 1.0;
969
        double tmpSourceSamplePosition = v->sourceSamplePosition;
970
        struct tsf_voice_lowpass tmpLowpass = v->lowpass;
971
 
972
        TSF_BOOL dynamicLowpass = (region->modLfoToFilterFc || region->modEnvToFilterFc);
973
        float tmpSampleRate, tmpInitialFilterFc, tmpModLfoToFilterFc, tmpModEnvToFilterFc;
974
 
975
        TSF_BOOL dynamicPitchRatio = (region->modLfoToPitch || region->modEnvToPitch || region->vibLfoToPitch);
976
        double pitchRatio;
977
        float tmpModLfoToPitch, tmpVibLfoToPitch, tmpModEnvToPitch;
978
 
979
        TSF_BOOL dynamicGain = (region->modLfoToVolume != 0);
980
        float noteGain = 0, tmpModLfoToVolume;
981
 
982
        if (dynamicLowpass) tmpSampleRate = f->outSampleRate, tmpInitialFilterFc = (float)region->initialFilterFc, tmpModLfoToFilterFc = (float)region->modLfoToFilterFc, tmpModEnvToFilterFc = (float)region->modEnvToFilterFc;
983
        else tmpSampleRate = 0, tmpInitialFilterFc = 0, tmpModLfoToFilterFc = 0, tmpModEnvToFilterFc = 0;
984
 
985
        if (dynamicPitchRatio) pitchRatio = 0, tmpModLfoToPitch = (float)region->modLfoToPitch, tmpVibLfoToPitch = (float)region->vibLfoToPitch, tmpModEnvToPitch = (float)region->modEnvToPitch;
986
        else pitchRatio = tsf_timecents2Secsd(v->pitchInputTimecents) * v->pitchOutputFactor, tmpModLfoToPitch = 0, tmpVibLfoToPitch = 0, tmpModEnvToPitch = 0;
987
 
988
        if (dynamicGain) tmpModLfoToVolume = (float)region->modLfoToVolume * 0.1f;
989
        else noteGain = tsf_decibelsToGain(v->noteGainDB), tmpModLfoToVolume = 0;
990
 
991
        while (numSamples)
992
        {
993
                float gainMono, gainLeft, gainRight;
994
                int blockSamples = (numSamples > TSF_RENDER_EFFECTSAMPLEBLOCK ? TSF_RENDER_EFFECTSAMPLEBLOCK : numSamples);
995
                numSamples -= blockSamples;
996
 
997
                if (dynamicLowpass)
998
                {
999
                        float fres = tmpInitialFilterFc + v->modlfo.level * tmpModLfoToFilterFc + v->modenv.level * tmpModEnvToFilterFc;
8770 terminx 1000
                        float lowpassFc = (fres <= 13500 ? tsf_cents2Hertz(fres) / f->outSampleRate : 1.0f);
1001
                        tmpLowpass.active = (lowpassFc < 0.499f);
1002
                        if (tmpLowpass.active) tsf_voice_lowpass_setup(&tmpLowpass, lowpassFc);
8752 terminx 1003
                }
1004
 
1005
                if (dynamicPitchRatio)
1006
                        pitchRatio = tsf_timecents2Secsd(v->pitchInputTimecents + (v->modlfo.level * tmpModLfoToPitch + v->viblfo.level * tmpVibLfoToPitch + v->modenv.level * tmpModEnvToPitch)) * v->pitchOutputFactor;
1007
 
1008
                if (dynamicGain)
1009
                        noteGain = tsf_decibelsToGain(v->noteGainDB + (v->modlfo.level * tmpModLfoToVolume));
1010
 
1011
                gainMono = noteGain * v->ampenv.level;
1012
 
1013
                // Update EG.
1014
                tsf_voice_envelope_process(&v->ampenv, blockSamples, f->outSampleRate);
1015
                if (updateModEnv) tsf_voice_envelope_process(&v->modenv, blockSamples, f->outSampleRate);
1016
 
1017
                // Update LFOs.
1018
                if (updateModLFO) tsf_voice_lfo_process(&v->modlfo, blockSamples);
1019
                if (updateVibLFO) tsf_voice_lfo_process(&v->viblfo, blockSamples);
1020
 
1021
                switch (f->outputmode)
1022
                {
1023
                        case TSF_STEREO_INTERLEAVED:
1024
                                gainLeft = gainMono * v->panFactorLeft, gainRight = gainMono * v->panFactorRight;
1025
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1026
                                {
1027
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1028
 
1029
                                        // Simple linear interpolation.
1030
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1031
 
1032
                                        // Low-pass filter.
1033
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1034
 
1035
                                        *outL++ += val * gainLeft;
1036
                                        *outL++ += val * gainRight;
1037
 
1038
                                        // Next sample.
1039
                                        tmpSourceSamplePosition += pitchRatio;
1040
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1041
                                }
1042
                                break;
1043
 
1044
                        case TSF_STEREO_UNWEAVED:
1045
                                gainLeft = gainMono * v->panFactorLeft, gainRight = gainMono * v->panFactorRight;
1046
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1047
                                {
1048
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1049
 
1050
                                        // Simple linear interpolation.
1051
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1052
 
1053
                                        // Low-pass filter.
1054
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1055
 
1056
                                        *outL++ += val * gainLeft;
1057
                                        *outR++ += val * gainRight;
1058
 
1059
                                        // Next sample.
1060
                                        tmpSourceSamplePosition += pitchRatio;
1061
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1062
                                }
1063
                                break;
1064
 
1065
                        case TSF_MONO:
1066
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1067
                                {
1068
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1069
 
1070
                                        // Simple linear interpolation.
1071
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1072
 
1073
                                        // Low-pass filter.
1074
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1075
 
1076
                                        *outL++ += val * gainMono;
1077
 
1078
                                        // Next sample.
1079
                                        tmpSourceSamplePosition += pitchRatio;
1080
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1081
                                }
1082
                                break;
1083
                }
1084
 
1085
                if (tmpSourceSamplePosition >= tmpSampleEndDbl || v->ampenv.segment == TSF_SEGMENT_DONE)
1086
                {
1087
                        tsf_voice_kill(v);
1088
                        return;
1089
                }
1090
        }
1091
 
1092
        v->sourceSamplePosition = tmpSourceSamplePosition;
1093
        if (tmpLowpass.active || dynamicLowpass) v->lowpass = tmpLowpass;
1094
}
1095
 
1096
TSFDEF tsf* tsf_load(struct tsf_stream* stream)
1097
{
1098
        tsf* res = TSF_NULL;
1099
        struct tsf_riffchunk chunkHead;
1100
        struct tsf_riffchunk chunkList;
1101
        struct tsf_hydra hydra;
1102
        float* fontSamples = TSF_NULL;
1103
        unsigned int fontSampleCount = 0;
1104
 
1105
        if (!tsf_riffchunk_read(TSF_NULL, &chunkHead, stream) || !TSF_FourCCEquals(chunkHead.id, "sfbk"))
1106
        {
1107
                //if (e) *e = TSF_INVALID_NOSF2HEADER;
1108
                return res;
1109
        }
1110
 
1111
        // Read hydra and locate sample data.
1112
        TSF_MEMSET(&hydra, 0, sizeof(hydra));
1113
        while (tsf_riffchunk_read(&chunkHead, &chunkList, stream))
1114
        {
1115
                struct tsf_riffchunk chunk;
1116
                if (TSF_FourCCEquals(chunkList.id, "pdta"))
1117
                {
1118
                        while (tsf_riffchunk_read(&chunkList, &chunk, stream))
1119
                        {
1120
                                #define HandleChunk(chunkName) (TSF_FourCCEquals(chunk.id, #chunkName) && !(chunk.size % chunkName##SizeInFile)) \
1121
                                        { \
1122
                                                int num = chunk.size / chunkName##SizeInFile, i; \
1123
                                                hydra.chunkName##Num = num; \
1124
                                                hydra.chunkName##s = (struct tsf_hydra_##chunkName*)TSF_MALLOC(num * sizeof(struct tsf_hydra_##chunkName)); \
1125
                                                for (i = 0; i < num; ++i) tsf_hydra_read_##chunkName(&hydra.chunkName##s[i], stream); \
1126
                                        }
1127
                                enum
1128
                                {
1129
                                        phdrSizeInFile = 38, pbagSizeInFile =  4, pmodSizeInFile = 10,
1130
                                        pgenSizeInFile =  4, instSizeInFile = 22, ibagSizeInFile =  4,
1131
                                        imodSizeInFile = 10, igenSizeInFile =  4, shdrSizeInFile = 46
1132
                                };
1133
                                if      HandleChunk(phdr) else if HandleChunk(pbag) else if HandleChunk(pmod)
1134
                                else if HandleChunk(pgen) else if HandleChunk(inst) else if HandleChunk(ibag)
1135
                                else if HandleChunk(imod) else if HandleChunk(igen) else if HandleChunk(shdr)
1136
                                else stream->skip(stream->data, chunk.size);
1137
                                #undef HandleChunk
1138
                        }
1139
                }
1140
                else if (TSF_FourCCEquals(chunkList.id, "sdta"))
1141
                {
1142
                        while (tsf_riffchunk_read(&chunkList, &chunk, stream))
1143
                        {
1144
                                if (TSF_FourCCEquals(chunk.id, "smpl"))
1145
                                {
1146
                                        tsf_load_samples(&fontSamples, &fontSampleCount, &chunk, stream);
1147
                                }
1148
                                else stream->skip(stream->data, chunk.size);
1149
                        }
1150
                }
1151
                else stream->skip(stream->data, chunkList.size);
1152
        }
1153
        if (!hydra.phdrs || !hydra.pbags || !hydra.pmods || !hydra.pgens || !hydra.insts || !hydra.ibags || !hydra.imods || !hydra.igens || !hydra.shdrs)
1154
        {
1155
                //if (e) *e = TSF_INVALID_INCOMPLETE;
1156
        }
1157
        else if (fontSamples == TSF_NULL)
1158
        {
1159
                //if (e) *e = TSF_INVALID_NOSAMPLEDATA;
1160
        }
1161
        else
1162
        {
1163
                res = (tsf*)TSF_MALLOC(sizeof(tsf));
1164
                TSF_MEMSET(res, 0, sizeof(tsf));
1165
                res->presetNum = hydra.phdrNum - 1;
1166
                res->presets = (struct tsf_preset*)TSF_MALLOC(res->presetNum * sizeof(struct tsf_preset));
1167
                res->fontSamples = fontSamples;
1168
                res->outSampleRate = 44100.0f;
1169
                fontSamples = TSF_NULL; //don't free below
1170
                tsf_load_presets(res, &hydra, fontSampleCount);
1171
        }
1172
        TSF_FREE(hydra.phdrs); TSF_FREE(hydra.pbags); TSF_FREE(hydra.pmods);
1173
        TSF_FREE(hydra.pgens); TSF_FREE(hydra.insts); TSF_FREE(hydra.ibags);
1174
        TSF_FREE(hydra.imods); TSF_FREE(hydra.igens); TSF_FREE(hydra.shdrs);
1175
        TSF_FREE(fontSamples);
1176
        return res;
1177
}
1178
 
1179
TSFDEF void tsf_close(tsf* f)
1180
{
1181
        struct tsf_preset *preset, *presetEnd;
1182
        if (!f) return;
1183
        for (preset = f->presets, presetEnd = preset + f->presetNum; preset != presetEnd; preset++)
1184
                TSF_FREE(preset->regions);
1185
        TSF_FREE(f->presets);
1186
        TSF_FREE(f->fontSamples);
1187
        TSF_FREE(f->voices);
1188
        if (f->channels) { TSF_FREE(f->channels->channels); TSF_FREE(f->channels); }
1189
        TSF_FREE(f->outputSamples);
1190
        TSF_FREE(f);
1191
}
1192
 
1193
TSFDEF void tsf_reset(tsf* f)
1194
{
1195
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1196
        for (; v != vEnd; v++)
1197
                if (v->playingPreset != -1 && (v->ampenv.segment < TSF_SEGMENT_RELEASE || v->ampenv.parameters.release))
1198
                        tsf_voice_endquick(v, f->outSampleRate);
1199
        if (f->channels) { TSF_FREE(f->channels->channels); TSF_FREE(f->channels); f->channels = TSF_NULL; }
1200
}
1201
 
1202
TSFDEF int tsf_get_presetindex(const tsf* f, int bank, int preset_number)
1203
{
1204
        const struct tsf_preset *presets;
1205
        int i, iMax;
1206
        for (presets = f->presets, i = 0, iMax = f->presetNum; i < iMax; i++)
1207
                if (presets[i].preset == preset_number && presets[i].bank == bank)
1208
                        return i;
1209
        return -1;
1210
}
1211
 
1212
TSFDEF int tsf_get_presetcount(const tsf* f)
1213
{
1214
        return f->presetNum;
1215
}
1216
 
1217
TSFDEF const char* tsf_get_presetname(const tsf* f, int preset)
1218
{
1219
        return (preset < 0 || preset >= f->presetNum ? TSF_NULL : f->presets[preset].presetName);
1220
}
1221
 
1222
TSFDEF const char* tsf_bank_get_presetname(const tsf* f, int bank, int preset_number)
1223
{
1224
        return tsf_get_presetname(f, tsf_get_presetindex(f, bank, preset_number));
1225
}
1226
 
1227
TSFDEF void tsf_set_output(tsf* f, enum TSFOutputMode outputmode, int samplerate, float global_gain_db)
1228
{
1229
        f->outputmode = outputmode;
1230
        f->outSampleRate = (float)(samplerate >= 1 ? samplerate : 44100.0f);
1231
        f->globalGainDB = global_gain_db;
1232
}
1233
 
1234
TSFDEF void tsf_note_on(tsf* f, int preset_index, int key, float vel)
1235
{
1236
        short midiVelocity = (short)(vel * 127);
1237
        int voicePlayIndex;
1238
        struct tsf_region *region, *regionEnd;
1239
 
1240
        if (preset_index < 0 || preset_index >= f->presetNum) return;
1241
        if (vel <= 0.0f) { tsf_note_off(f, preset_index, key); return; }
1242
 
1243
        // Play all matching regions.
1244
        voicePlayIndex = f->voicePlayIndex++;
1245
        for (region = f->presets[preset_index].regions, regionEnd = region + f->presets[preset_index].regionNum; region != regionEnd; region++)
1246
        {
8770 terminx 1247
                struct tsf_voice *voice, *v, *vEnd; TSF_BOOL doLoop; float lowpassFilterQDB, lowpassFc;
8752 terminx 1248
                if (key < region->lokey || key > region->hikey || midiVelocity < region->lovel || midiVelocity > region->hivel) continue;
1249
 
1250
                voice = TSF_NULL, v = f->voices, vEnd = v + f->voiceNum;
1251
                if (region->group)
1252
                {
1253
                        for (; v != vEnd; v++)
1254
                                if (v->playingPreset == preset_index && v->region->group == region->group) tsf_voice_endquick(v, f->outSampleRate);
1255
                                else if (v->playingPreset == -1 && !voice) voice = v;
1256
                }
1257
                else for (; v != vEnd; v++) if (v->playingPreset == -1) { voice = v; break; }
1258
 
1259
                if (!voice)
1260
                {
1261
                        f->voiceNum += 4;
1262
                        f->voices = (struct tsf_voice*)TSF_REALLOC(f->voices, f->voiceNum * sizeof(struct tsf_voice));
1263
                        voice = &f->voices[f->voiceNum - 4];
1264
                        voice[1].playingPreset = voice[2].playingPreset = voice[3].playingPreset = -1;
1265
                }
1266
 
1267
                voice->region = region;
1268
                voice->playingPreset = preset_index;
1269
                voice->playingKey = key;
1270
                voice->playIndex = voicePlayIndex;
8754 terminx 1271
                voice->noteGainDB = f->globalGainDB - clamp(region->attenuation, 0.f, 144.f) - tsf_gainToDecibels(1.0f / vel);
8752 terminx 1272
 
1273
                if (f->channels)
1274
                {
1275
                        f->channels->setupVoice(f, voice);
1276
                }
1277
                else
1278
                {
1279
                        tsf_voice_calcpitchratio(voice, 0, f->outSampleRate);
1280
                        // The SFZ spec is silent about the pan curve, but a 3dB pan law seems common. This sqrt() curve matches what Dimension LE does; Alchemy Free seems closer to sin(adjustedPan * pi/2).
1281
                        voice->panFactorLeft  = TSF_SQRTF(0.5f - region->pan);
1282
                        voice->panFactorRight = TSF_SQRTF(0.5f + region->pan);
1283
                }
1284
 
1285
                // Offset/end.
1286
                voice->sourceSamplePosition = region->offset;
1287
 
1288
                // Loop.
1289
                doLoop = (region->loop_mode != TSF_LOOPMODE_NONE && region->loop_start < region->loop_end);
1290
                voice->loopStart = (doLoop ? region->loop_start : 0);
1291
                voice->loopEnd = (doLoop ? region->loop_end : 0);
1292
 
1293
                // Setup envelopes.
1294
                tsf_voice_envelope_setup(&voice->ampenv, &region->ampenv, key, midiVelocity, TSF_TRUE, f->outSampleRate);
1295
                tsf_voice_envelope_setup(&voice->modenv, &region->modenv, key, midiVelocity, TSF_FALSE, f->outSampleRate);
1296
 
1297
                // Setup lowpass filter.
8770 terminx 1298
                lowpassFc = (region->initialFilterFc <= 13500 ? tsf_cents2Hertz((float)region->initialFilterFc) / f->outSampleRate : 1.0f);
1299
                lowpassFilterQDB = region->initialFilterQ / 10.0f;
1300
                voice->lowpass.QInv = 1.0 / TSF_POW(10.0, (lowpassFilterQDB / 20.0));
8752 terminx 1301
                voice->lowpass.z1 = voice->lowpass.z2 = 0;
8770 terminx 1302
                voice->lowpass.active = (lowpassFc < 0.499f);
1303
                if (voice->lowpass.active) tsf_voice_lowpass_setup(&voice->lowpass, lowpassFc);
8752 terminx 1304
 
1305
                // Setup LFO filters.
1306
                tsf_voice_lfo_setup(&voice->modlfo, region->delayModLFO, region->freqModLFO, f->outSampleRate);
1307
                tsf_voice_lfo_setup(&voice->viblfo, region->delayVibLFO, region->freqVibLFO, f->outSampleRate);
1308
        }
1309
}
1310
 
1311
TSFDEF int tsf_bank_note_on(tsf* f, int bank, int preset_number, int key, float vel)
1312
{
1313
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1314
        if (preset_index == -1) return 0;
1315
        tsf_note_on(f, preset_index, key, vel);
1316
        return 1;
1317
}
1318
 
1319
TSFDEF void tsf_note_off(tsf* f, int preset_index, int key)
1320
{
1321
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum, *vMatchFirst = TSF_NULL, *vMatchLast = TSF_NULL;
1322
        for (; v != vEnd; v++)
1323
        {
1324
                //Find the first and last entry in the voices list with matching preset, key and look up the smallest play index
1325
                if (v->playingPreset != preset_index || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE) continue;
1326
                else if (!vMatchFirst || v->playIndex < vMatchFirst->playIndex) vMatchFirst = vMatchLast = v;
1327
                else if (v->playIndex == vMatchFirst->playIndex) vMatchLast = v;
1328
        }
1329
        if (!vMatchFirst) return;
1330
        for (v = vMatchFirst; v <= vMatchLast; v++)
1331
        {
1332
                //Stop all voices with matching preset, key and the smallest play index which was enumerated above
1333
                if (v != vMatchFirst && v != vMatchLast &&
1334
                        (v->playIndex != vMatchFirst->playIndex || v->playingPreset != preset_index || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE)) continue;
1335
                tsf_voice_end(v, f->outSampleRate);
1336
        }
1337
}
1338
 
1339
TSFDEF int tsf_bank_note_off(tsf* f, int bank, int preset_number, int key)
1340
{
1341
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1342
        if (preset_index == -1) return 0;
1343
        tsf_note_off(f, preset_index, key);
1344
        return 1;
1345
}
1346
 
1347
TSFDEF void tsf_note_off_all(tsf* f)
1348
{
1349
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1350
        for (; v != vEnd; v++) if (v->playingPreset != -1 && v->ampenv.segment < TSF_SEGMENT_RELEASE)
1351
                tsf_voice_end(v, f->outSampleRate);
1352
}
1353
 
1354
TSFDEF int tsf_active_voice_count(tsf* f)
1355
{
1356
        int count = 0;
1357
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1358
        for (; v != vEnd; v++) if (v->playingPreset != -1) count++;
1359
        return count;
1360
}
1361
 
1362
TSFDEF void tsf_render_short(tsf* f, short* buffer, int samples, int flag_mixing)
1363
{
1364
        float *floatSamples;
1365
        int channelSamples = (f->outputmode == TSF_MONO ? 1 : 2) * samples, floatBufferSize = channelSamples * sizeof(float);
1366
        short* bufferEnd = buffer + channelSamples;
1367
        if (floatBufferSize > f->outputSampleSize)
1368
        {
1369
                TSF_FREE(f->outputSamples);
1370
                f->outputSamples = (float*)TSF_MALLOC(floatBufferSize);
1371
                f->outputSampleSize = floatBufferSize;
1372
        }
1373
 
1374
        tsf_render_float(f, f->outputSamples, samples, TSF_FALSE);
1375
 
1376
        floatSamples = f->outputSamples;
1377
        if (flag_mixing)
1378
                while (buffer != bufferEnd)
1379
                {
1380
                        float v = *floatSamples++;
1381
                        int vi = *buffer + (v < -1.00004566f ? (int)-32768 : (v > 1.00001514f ? (int)32767 : (int)(v * 32767.5f)));
1382
                        *buffer++ = (vi < -32768 ? (short)-32768 : (vi > 32767 ? (short)32767 : (short)vi));
1383
                }
1384
        else
1385
                while (buffer != bufferEnd)
1386
                {
1387
                        float v = *floatSamples++;
1388
                        *buffer++ = (v < -1.00004566f ? (short)-32768 : (v > 1.00001514f ? (short)32767 : (short)(v * 32767.5f)));
1389
                }
1390
}
1391
 
1392
TSFDEF void tsf_render_float(tsf* f, float* buffer, int samples, int flag_mixing)
1393
{
1394
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1395
        if (!flag_mixing) TSF_MEMSET(buffer, 0, (f->outputmode == TSF_MONO ? 1 : 2) * sizeof(float) * samples);
1396
        for (; v != vEnd; v++)
1397
                if (v->playingPreset != -1)
1398
                        tsf_voice_render(f, v, buffer, samples);
1399
}
1400
 
1401
static void tsf_channel_setup_voice(tsf* f, struct tsf_voice* v)
1402
{
1403
        struct tsf_channel* c = &f->channels->channels[f->channels->activeChannel];
1404
        float newpan = v->region->pan + c->panOffset;
1405
        v->playingChannel = f->channels->activeChannel;
1406
        v->noteGainDB += c->gainDB;
1407
        tsf_voice_calcpitchratio(v, (c->pitchWheel == 8192 ? c->tuning : ((c->pitchWheel / 16383.0f * c->pitchRange * 2.0f) - c->pitchRange + c->tuning)), f->outSampleRate);
1408
        if      (newpan <= -0.5f) { v->panFactorLeft = 1.0f; v->panFactorRight = 0.0f; }
1409
        else if (newpan >=  0.5f) { v->panFactorLeft = 0.0f; v->panFactorRight = 1.0f; }
1410
        else { v->panFactorLeft = TSF_SQRTF(0.5f - newpan); v->panFactorRight = TSF_SQRTF(0.5f + newpan); }
1411
}
1412
 
1413
static struct tsf_channel* tsf_channel_init(tsf* f, int channel)
1414
{
1415
        int i;
1416
        if (f->channels && channel < f->channels->channelNum) return &f->channels->channels[channel];
1417
        if (!f->channels)
1418
        {
1419
                f->channels = (struct tsf_channels*)TSF_MALLOC(sizeof(struct tsf_channels));
1420
                f->channels->setupVoice = &tsf_channel_setup_voice;
1421
                f->channels->channels = NULL;
1422
                f->channels->channelNum = 0;
1423
                f->channels->activeChannel = 0;
1424
        }
1425
        i = f->channels->channelNum;
1426
        f->channels->channelNum = channel + 1;
1427
        f->channels->channels = (struct tsf_channel*)TSF_REALLOC(f->channels->channels, f->channels->channelNum * sizeof(struct tsf_channel));
1428
        for (; i <= channel; i++)
1429
        {
1430
                struct tsf_channel* c = &f->channels->channels[i];
1431
                c->presetIndex = c->bank = 0;
1432
                c->pitchWheel = c->midiPan = 8192;
1433
                c->midiVolume = c->midiExpression = 16383;
1434
                c->midiRPN = 0xFFFF;
1435
                c->midiData = 0;
1436
                c->panOffset = 0.0f;
1437
                c->gainDB = 0.0f;
1438
                c->pitchRange = 2.0f;
1439
                c->tuning = 0.0f;
1440
        }
1441
        return &f->channels->channels[channel];
1442
}
1443
 
1444
static void tsf_channel_applypitch(tsf* f, int channel, struct tsf_channel* c)
1445
{
1446
        struct tsf_voice *v, *vEnd;
1447
        float pitchShift = (c->pitchWheel == 8192 ? c->tuning : ((c->pitchWheel / 16383.0f * c->pitchRange * 2.0f) - c->pitchRange + c->tuning));
1448
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1449
                if (v->playingChannel == channel && v->playingPreset != -1)
1450
                        tsf_voice_calcpitchratio(v, pitchShift, f->outSampleRate);
1451
}
1452
 
1453
TSFDEF void tsf_channel_set_presetindex(tsf* f, int channel, int preset_index)
1454
{
1455
        tsf_channel_init(f, channel)->presetIndex = (unsigned short)preset_index;
1456
}
1457
 
1458
TSFDEF int tsf_channel_set_presetnumber(tsf* f, int channel, int preset_number, int flag_mididrums)
1459
{
1460
        struct tsf_channel *c = tsf_channel_init(f, channel);
1461
        int preset_index;
1462
        if (flag_mididrums)
1463
        {
1464
                preset_index = tsf_get_presetindex(f, 128 | (c->bank & 0x7FFF), preset_number);
1465
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, 128, preset_number);
1466
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, 128, 0);
1467
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, (c->bank & 0x7FFF), preset_number);
1468
        }
1469
        else preset_index = tsf_get_presetindex(f, (c->bank & 0x7FFF), preset_number);
1470
        if (preset_index == -1) preset_index = tsf_get_presetindex(f, 0, preset_number);
1471
        if (preset_index != -1)
1472
        {
1473
                c->presetIndex = (unsigned short)preset_index;
1474
                return 1;
1475
        }
1476
        return 0;
1477
}
1478
 
1479
TSFDEF void tsf_channel_set_bank(tsf* f, int channel, int bank)
1480
{
1481
        tsf_channel_init(f, channel)->bank = (unsigned short)bank;
1482
}
1483
 
1484
TSFDEF int tsf_channel_set_bank_preset(tsf* f, int channel, int bank, int preset_number)
1485
{
1486
        struct tsf_channel *c = tsf_channel_init(f, channel);
1487
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1488
        if (preset_index == -1) return 0;
1489
        c->presetIndex = (unsigned short)preset_index;
1490
        c->bank = (unsigned short)bank;
1491
        return 1;
1492
}
1493
 
1494
TSFDEF void tsf_channel_set_pan(tsf* f, int channel, float pan)
1495
{
1496
        struct tsf_voice *v, *vEnd;
1497
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1498
                if (v->playingChannel == channel && v->playingPreset != -1)
1499
                {
1500
                        float newpan = v->region->pan + pan - 0.5f;
1501
                        if      (newpan <= -0.5f) { v->panFactorLeft = 1.0f; v->panFactorRight = 0.0f; }
1502
                        else if (newpan >=  0.5f) { v->panFactorLeft = 0.0f; v->panFactorRight = 1.0f; }
1503
                        else { v->panFactorLeft = TSF_SQRTF(0.5f - newpan); v->panFactorRight = TSF_SQRTF(0.5f + newpan); }
1504
                }
1505
        tsf_channel_init(f, channel)->panOffset = pan - 0.5f;
1506
}
1507
 
1508
TSFDEF void tsf_channel_set_volume(tsf* f, int channel, float volume)
1509
{
1510
        struct tsf_channel *c = tsf_channel_init(f, channel);
1511
        float gainDB = tsf_gainToDecibels(volume), gainDBChange = gainDB - c->gainDB;
1512
        struct tsf_voice *v, *vEnd;
1513
        if (gainDBChange == 0) return;
1514
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1515
                if (v->playingChannel == channel && v->playingPreset != -1)
1516
                        v->noteGainDB += gainDBChange;
1517
        c->gainDB = gainDB;
1518
}
1519
 
1520
TSFDEF void tsf_channel_set_pitchwheel(tsf* f, int channel, int pitch_wheel)
1521
{
1522
        struct tsf_channel *c = tsf_channel_init(f, channel);
1523
        if (c->pitchWheel == pitch_wheel) return;
1524
        c->pitchWheel = (unsigned short)pitch_wheel;
1525
        tsf_channel_applypitch(f, channel, c);
1526
}
1527
 
1528
TSFDEF void tsf_channel_set_pitchrange(tsf* f, int channel, float pitch_range)
1529
{
1530
        struct tsf_channel *c = tsf_channel_init(f, channel);
1531
        if (c->pitchRange == pitch_range) return;
1532
        c->pitchRange = pitch_range;
1533
        if (c->pitchWheel != 8192) tsf_channel_applypitch(f, channel, c);
1534
}
1535
 
1536
TSFDEF void tsf_channel_set_tuning(tsf* f, int channel, float tuning)
1537
{
1538
        struct tsf_channel *c = tsf_channel_init(f, channel);
1539
        if (c->tuning == tuning) return;
1540
        c->tuning = tuning;
1541
        tsf_channel_applypitch(f, channel, c);
1542
}
1543
 
1544
TSFDEF void tsf_channel_note_on(tsf* f, int channel, int key, float vel)
1545
{
1546
        if (!f->channels || channel >= f->channels->channelNum) return;
1547
        f->channels->activeChannel = channel;
1548
        tsf_note_on(f, f->channels->channels[channel].presetIndex, key, vel);
1549
}
1550
 
1551
TSFDEF void tsf_channel_note_off(tsf* f, int channel, int key)
1552
{
1553
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum, *vMatchFirst = TSF_NULL, *vMatchLast = TSF_NULL;
1554
        for (; v != vEnd; v++)
1555
        {
1556
                //Find the first and last entry in the voices list with matching channel, key and look up the smallest play index
1557
                if (v->playingPreset == -1 || v->playingChannel != channel || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE) continue;
1558
                else if (!vMatchFirst || v->playIndex < vMatchFirst->playIndex) vMatchFirst = vMatchLast = v;
1559
                else if (v->playIndex == vMatchFirst->playIndex) vMatchLast = v;
1560
        }
1561
        if (!vMatchFirst) return;
1562
        for (v = vMatchFirst; v <= vMatchLast; v++)
1563
        {
1564
                //Stop all voices with matching channel, key and the smallest play index which was enumerated above
1565
                if (v != vMatchFirst && v != vMatchLast &&
1566
                        (v->playIndex != vMatchFirst->playIndex || v->playingPreset == -1 || v->playingChannel != channel || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE)) continue;
1567
                tsf_voice_end(v, f->outSampleRate);
1568
        }
1569
}
1570
 
1571
TSFDEF void tsf_channel_note_off_all(tsf* f, int channel)
1572
{
1573
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1574
        for (; v != vEnd; v++)
1575
                if (v->playingPreset != -1 && v->playingChannel == channel && v->ampenv.segment < TSF_SEGMENT_RELEASE)
1576
                        tsf_voice_end(v, f->outSampleRate);
1577
}
1578
 
1579
TSFDEF void tsf_channel_sounds_off_all(tsf* f, int channel)
1580
{
1581
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1582
        for (; v != vEnd; v++)
1583
                if (v->playingPreset != -1 && v->playingChannel == channel && (v->ampenv.segment < TSF_SEGMENT_RELEASE || v->ampenv.parameters.release))
1584
                        tsf_voice_endquick(v, f->outSampleRate);
1585
}
1586
 
1587
TSFDEF void tsf_channel_midi_control(tsf* f, int channel, int controller, int control_value)
1588
{
1589
        struct tsf_channel* c = tsf_channel_init(f, channel);
1590
        switch (controller)
1591
        {
1592
                case   7 /*VOLUME_MSB*/      : c->midiVolume     = (unsigned short)((c->midiVolume     & 0x7F  ) | (control_value << 7)); goto TCMC_SET_VOLUME;
1593
                case  39 /*VOLUME_LSB*/      : c->midiVolume     = (unsigned short)((c->midiVolume     & 0x3F80) |  control_value);       goto TCMC_SET_VOLUME;
1594
                case  11 /*EXPRESSION_MSB*/  : c->midiExpression = (unsigned short)((c->midiExpression & 0x7F  ) | (control_value << 7)); goto TCMC_SET_VOLUME;
1595
                case  43 /*EXPRESSION_LSB*/  : c->midiExpression = (unsigned short)((c->midiExpression & 0x3F80) |  control_value);       goto TCMC_SET_VOLUME;
1596
                case  10 /*PAN_MSB*/         : c->midiPan        = (unsigned short)((c->midiPan        & 0x7F  ) | (control_value << 7)); goto TCMC_SET_PAN;
1597
                case  42 /*PAN_LSB*/         : c->midiPan        = (unsigned short)((c->midiPan        & 0x3F80) |  control_value);       goto TCMC_SET_PAN;
1598
                case   6 /*DATA_ENTRY_MSB*/  : c->midiData       = (unsigned short)((c->midiData       & 0x7F)   | (control_value << 7)); goto TCMC_SET_DATA;
1599
                case  38 /*DATA_ENTRY_LSB*/  : c->midiData       = (unsigned short)((c->midiData       & 0x3F80) |  control_value);       goto TCMC_SET_DATA;
1600
                case   0 /*BANK_SELECT_MSB*/ : c->bank = (unsigned short)(0x8000 | control_value); return; //bank select MSB alone acts like LSB
1601
                case  32 /*BANK_SELECT_LSB*/ : c->bank = (unsigned short)((c->bank & 0x8000 ? ((c->bank & 0x7F) << 7) : 0) | control_value); return;
1602
                case 101 /*RPN_MSB*/         : c->midiRPN = (unsigned short)(((c->midiRPN == 0xFFFF ? 0 : c->midiRPN) & 0x7F  ) | (control_value << 7)); return;
1603
                case 100 /*RPN_LSB*/         : c->midiRPN = (unsigned short)(((c->midiRPN == 0xFFFF ? 0 : c->midiRPN) & 0x3F80) |  control_value); return;
1604
                case  98 /*NRPN_LSB*/        : c->midiRPN = 0xFFFF; return;
1605
                case  99 /*NRPN_MSB*/        : c->midiRPN = 0xFFFF; return;
1606
                case 120 /*ALL_SOUND_OFF*/   : tsf_channel_sounds_off_all(f, channel); return;
1607
                case 123 /*ALL_NOTES_OFF*/   : tsf_channel_note_off_all(f, channel);   return;
1608
                case 121 /*ALL_CTRL_OFF*/    :
1609
                        c->midiVolume = c->midiExpression = 16383;
1610
                        c->midiPan = 8192;
1611
                        c->bank = 0;
1612
                        tsf_channel_set_volume(f, channel, 1.0f);
1613
                        tsf_channel_set_pan(f, channel, 0.5f);
1614
                        tsf_channel_set_pitchrange(f, channel, 2.0f);
1615
                        return;
1616
        }
1617
        return;
1618
TCMC_SET_VOLUME:
1619
        //Raising to the power of 3 seems to result in a decent sounding volume curve for MIDI
1620
        tsf_channel_set_volume(f, channel, TSF_POWF((c->midiVolume / 16383.0f) * (c->midiExpression / 16383.0f), 3.0f));
1621
        return;
1622
TCMC_SET_PAN:
1623
        tsf_channel_set_pan(f, channel, c->midiPan / 16383.0f);
1624
        return;
1625
TCMC_SET_DATA:
1626
        if      (c->midiRPN == 0) tsf_channel_set_pitchrange(f, channel, (c->midiData >> 7) + 0.01f * (c->midiData & 0x7F));
1627
        else if (c->midiRPN == 1) tsf_channel_set_tuning(f, channel, (int)c->tuning + ((float)c->midiData - 8192.0f) / 8192.0f); //fine tune
1628
        else if (c->midiRPN == 2 && controller == 6) tsf_channel_set_tuning(f, channel, ((float)control_value - 64.0f) + (c->tuning - (int)c->tuning)); //coarse tune
1629
        return;
1630
}
1631
 
1632
TSFDEF int tsf_channel_get_preset_index(tsf* f, int channel)
1633
{
1634
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].presetIndex : 0);
1635
}
1636
 
1637
TSFDEF int tsf_channel_get_preset_bank(tsf* f, int channel)
1638
{
1639
        return (f->channels && channel < f->channels->channelNum ? (f->channels->channels[channel].bank & 0x7FFF) : 0);
1640
}
1641
 
1642
TSFDEF int tsf_channel_get_preset_number(tsf* f, int channel)
1643
{
1644
        return (f->channels && channel < f->channels->channelNum ? f->presets[f->channels->channels[channel].presetIndex].preset : 0);
1645
}
1646
 
1647
TSFDEF float tsf_channel_get_pan(tsf* f, int channel)
1648
{
1649
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].panOffset - 0.5f : 0.5f);
1650
}
1651
 
1652
TSFDEF float tsf_channel_get_volume(tsf* f, int channel)
1653
{
1654
        return (f->channels && channel < f->channels->channelNum ? tsf_decibelsToGain(f->channels->channels[channel].gainDB) : 1.0f);
1655
}
1656
 
1657
TSFDEF int tsf_channel_get_pitchwheel(tsf* f, int channel)
1658
{
1659
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].pitchWheel : 8192);
1660
}
1661
 
1662
TSFDEF float tsf_channel_get_pitchrange(tsf* f, int channel)
1663
{
1664
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].pitchRange : 2.0f);
1665
}
1666
 
1667
TSFDEF float tsf_channel_get_tuning(tsf* f, int channel)
1668
{
1669
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].tuning : 0.0f);
1670
}
1671
 
1672
#ifdef __cplusplus
1673
}
1674
#endif
1675
 
1676
#endif //TSF_IMPLEMENTATION