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/* 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
 
8775 terminx 471
static void tsf_region_operator(struct tsf_region* region, tsf_u16 genOper, union tsf_hydra_genamount* amount, struct tsf_region* merge_region)
8752 terminx 472
{
473
        enum
474
        {
8775 terminx 475
                _GEN_TYPE_MASK       = 0x0F,
476
                GEN_FLOAT            = 0x01,
477
                GEN_INT              = 0x02,
478
                GEN_UINT_ADD         = 0x03,
479
                GEN_UINT_ADD15       = 0x04,
480
                GEN_KEYRANGE         = 0x05,
481
                GEN_VELRANGE         = 0x06,
482
                GEN_LOOPMODE         = 0x07,
483
                GEN_GROUP            = 0x08,
484
                GEN_KEYCENTER        = 0x09,
485
 
486
                _GEN_LIMIT_MASK      = 0xF0,
487
                GEN_INT_LIMIT12K     = 0x10, //min -12000, max 12000
488
                GEN_INT_LIMITFC      = 0x20, //min 1500, max 13500
489
                GEN_INT_LIMITQ       = 0x30, //min 0, max 960
490
                GEN_INT_LIMIT960     = 0x40, //min -960, max 960
491
                GEN_INT_LIMIT16K4500 = 0x50, //min -16000, max 4500
492
                GEN_FLOAT_LIMIT12K5K = 0x60, //min -12000, max 5000
493
                GEN_FLOAT_LIMIT12K8K = 0x70, //min -12000, max 8000
494
                GEN_FLOAT_LIMIT1200  = 0x80, //min -1200, max 1200
495
                GEN_FLOAT_LIMITPAN   = 0x90, //* .001f, min -.5f, max .5f,
496
                GEN_FLOAT_LIMITATTN  = 0xA0, //* .1f, min 0, max 144.0
497
                GEN_FLOAT_MAX1000    = 0xB0, //min 0, max 1000
498
                GEN_FLOAT_MAX1440    = 0xC0, //min 0, max 1440
499
 
500
                _GEN_MAX = 59,
8752 terminx 501
        };
8775 terminx 502
        #define _TSFREGIONOFFSET(TYPE, FIELD) (unsigned char)(((TYPE*)&((struct tsf_region*)0)->FIELD) - (TYPE*)0)
503
        #define _TSFREGIONENVOFFSET(TYPE, ENV, FIELD) (unsigned char)(((TYPE*)&((&(((struct tsf_region*)0)->ENV))->FIELD)) - (TYPE*)0)
504
        static const struct { unsigned char mode, offset; } genMetas[_GEN_MAX] =
8752 terminx 505
        {
8775 terminx 506
                { GEN_UINT_ADD                     , _TSFREGIONOFFSET(unsigned int, offset               ) }, // 0 StartAddrsOffset
507
                { GEN_UINT_ADD                     , _TSFREGIONOFFSET(unsigned int, end                  ) }, // 1 EndAddrsOffset
508
                { GEN_UINT_ADD                     , _TSFREGIONOFFSET(unsigned int, loop_start           ) }, // 2 StartloopAddrsOffset
509
                { GEN_UINT_ADD                     , _TSFREGIONOFFSET(unsigned int, loop_end             ) }, // 3 EndloopAddrsOffset
510
                { GEN_UINT_ADD15                   , _TSFREGIONOFFSET(unsigned int, offset               ) }, // 4 StartAddrsCoarseOffset
511
                { GEN_INT   | GEN_INT_LIMIT12K     , _TSFREGIONOFFSET(         int, modLfoToPitch        ) }, // 5 ModLfoToPitch
512
                { GEN_INT   | GEN_INT_LIMIT12K     , _TSFREGIONOFFSET(         int, vibLfoToPitch        ) }, // 6 VibLfoToPitch
513
                { GEN_INT   | GEN_INT_LIMIT12K     , _TSFREGIONOFFSET(         int, modEnvToPitch        ) }, // 7 ModEnvToPitch
514
                { GEN_INT   | GEN_INT_LIMITFC      , _TSFREGIONOFFSET(         int, initialFilterFc      ) }, // 8 InitialFilterFc
515
                { GEN_INT   | GEN_INT_LIMITQ       , _TSFREGIONOFFSET(         int, initialFilterQ       ) }, // 9 InitialFilterQ
516
                { GEN_INT   | GEN_INT_LIMIT12K     , _TSFREGIONOFFSET(         int, modLfoToFilterFc     ) }, //10 ModLfoToFilterFc
517
                { GEN_INT   | GEN_INT_LIMIT12K     , _TSFREGIONOFFSET(         int, modEnvToFilterFc     ) }, //11 ModEnvToFilterFc
518
                { GEN_UINT_ADD15                   , _TSFREGIONOFFSET(unsigned int, end                  ) }, //12 EndAddrsCoarseOffset
519
                { GEN_INT   | GEN_INT_LIMIT960     , _TSFREGIONOFFSET(         int, modLfoToVolume       ) }, //13 ModLfoToVolume
520
                { 0                                , (0                                                  ) }, //   Unused
521
                { 0                                , (0                                                  ) }, //15 ChorusEffectsSend (unsupported)
522
                { 0                                , (0                                                  ) }, //16 ReverbEffectsSend (unsupported)
523
                { GEN_FLOAT | GEN_FLOAT_LIMITPAN   , _TSFREGIONOFFSET(       float, pan                  ) }, //17 Pan
524
                { 0                                , (0                                                  ) }, //   Unused
525
                { 0                                , (0                                                  ) }, //   Unused
526
                { 0                                , (0                                                  ) }, //   Unused
527
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K5K , _TSFREGIONOFFSET(       float, delayModLFO          ) }, //21 DelayModLFO
528
                { GEN_INT   | GEN_INT_LIMIT16K4500 , _TSFREGIONOFFSET(         int, freqModLFO           ) }, //22 FreqModLFO
529
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K5K , _TSFREGIONOFFSET(       float, delayVibLFO          ) }, //23 DelayVibLFO
530
                { GEN_INT   | GEN_INT_LIMIT16K4500 , _TSFREGIONOFFSET(         int, freqVibLFO           ) }, //24 FreqVibLFO
531
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K5K , _TSFREGIONENVOFFSET(    float, modenv, delay        ) }, //25 DelayModEnv
532
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K8K , _TSFREGIONENVOFFSET(    float, modenv, attack       ) }, //26 AttackModEnv
533
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K5K , _TSFREGIONENVOFFSET(    float, modenv, hold         ) }, //27 HoldModEnv
534
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K8K , _TSFREGIONENVOFFSET(    float, modenv, decay        ) }, //28 DecayModEnv
535
                { GEN_FLOAT | GEN_FLOAT_MAX1000    , _TSFREGIONENVOFFSET(    float, modenv, sustain      ) }, //29 SustainModEnv
536
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K8K , _TSFREGIONENVOFFSET(    float, modenv, release      ) }, //30 ReleaseModEnv
537
                { GEN_FLOAT | GEN_FLOAT_LIMIT1200  , _TSFREGIONENVOFFSET(    float, modenv, keynumToHold ) }, //31 KeynumToModEnvHold
538
                { GEN_FLOAT | GEN_FLOAT_LIMIT1200  , _TSFREGIONENVOFFSET(    float, modenv, keynumToDecay) }, //32 KeynumToModEnvDecay
539
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K5K , _TSFREGIONENVOFFSET(    float, ampenv, delay        ) }, //33 DelayVolEnv
540
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K8K , _TSFREGIONENVOFFSET(    float, ampenv, attack       ) }, //34 AttackVolEnv
541
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K5K , _TSFREGIONENVOFFSET(    float, ampenv, hold         ) }, //35 HoldVolEnv
542
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K8K , _TSFREGIONENVOFFSET(    float, ampenv, decay        ) }, //36 DecayVolEnv
543
                { GEN_FLOAT | GEN_FLOAT_MAX1440    , _TSFREGIONENVOFFSET(    float, ampenv, sustain      ) }, //37 SustainVolEnv
544
                { GEN_FLOAT | GEN_FLOAT_LIMIT12K8K , _TSFREGIONENVOFFSET(    float, ampenv, release      ) }, //38 ReleaseVolEnv
545
                { GEN_FLOAT | GEN_FLOAT_LIMIT1200  , _TSFREGIONENVOFFSET(    float, ampenv, keynumToHold ) }, //39 KeynumToVolEnvHold
546
                { GEN_FLOAT | GEN_FLOAT_LIMIT1200  , _TSFREGIONENVOFFSET(    float, ampenv, keynumToDecay) }, //40 KeynumToVolEnvDecay
547
                { 0                                , (0                                                  ) }, //   Instrument (special)
548
                { 0                                , (0                                                  ) }, //   Reserved
549
                { GEN_KEYRANGE                     , (0                                                  ) }, //43 KeyRange
550
                { GEN_VELRANGE                     , (0                                                  ) }, //44 VelRange
551
                { GEN_UINT_ADD15                   , _TSFREGIONOFFSET(unsigned int, loop_start           ) }, //45 StartloopAddrsCoarseOffset
552
                { 0                                , (0                                                  ) }, //46 Keynum (special)
553
                { 0                                , (0                                                  ) }, //47 Velocity (special)
554
                { GEN_FLOAT | GEN_FLOAT_LIMITATTN  , _TSFREGIONOFFSET(       float, attenuation          ) }, //48 InitialAttenuation
555
                { 0                                , (0                                                  ) }, //   Reserved
556
                { GEN_UINT_ADD15                   , _TSFREGIONOFFSET(unsigned int, loop_end             ) }, //50 EndloopAddrsCoarseOffset
557
                { GEN_INT                          , _TSFREGIONOFFSET(         int, transpose            ) }, //51 CoarseTune
558
                { GEN_INT                          , _TSFREGIONOFFSET(         int, tune                 ) }, //52 FineTune
559
                { 0                                , (0                                                  ) }, //   SampleID (special)
560
                { GEN_LOOPMODE                     , _TSFREGIONOFFSET(         int, loop_mode            ) }, //54 SampleModes
561
                { 0                                , (0                                                  ) }, //   Reserved
562
                { GEN_INT                          , _TSFREGIONOFFSET(         int, pitch_keytrack       ) }, //56 ScaleTuning
563
                { GEN_GROUP                        , _TSFREGIONOFFSET(unsigned int, group                ) }, //57 ExclusiveClass
564
                { GEN_KEYCENTER                    , _TSFREGIONOFFSET(         int, pitch_keycenter      ) }, //58 OverridingRootKey
565
        };
566
        #undef _TSFREGIONOFFSET
567
        #undef _TSFREGIONENVOFFSET
568
        if (amount)
569
        {
570
                int offset;
571
                if (genOper >= _GEN_MAX) return;
572
                offset = genMetas[genOper].offset;
573
                switch (genMetas[genOper].mode & _GEN_TYPE_MASK)
574
                {
575
                        case GEN_FLOAT:      ((       float*)region)[offset]  = amount->shortAmount;     return;
576
                        case GEN_INT:        ((         int*)region)[offset]  = amount->shortAmount;     return;
577
                        case GEN_UINT_ADD:   ((unsigned int*)region)[offset] += amount->shortAmount;     return;
578
                        case GEN_UINT_ADD15: ((unsigned int*)region)[offset] += amount->shortAmount<<15; return;
579
                        case GEN_KEYRANGE:   region->lokey = amount->range.lo; region->hikey = amount->range.hi; return;
580
                        case GEN_VELRANGE:   region->lovel = amount->range.lo; region->hivel = amount->range.hi; return;
581
                        case GEN_LOOPMODE:   region->loop_mode       = ((amount->wordAmount&3) == 3 ? TSF_LOOPMODE_SUSTAIN : ((amount->wordAmount&3) == 1 ? TSF_LOOPMODE_CONTINUOUS : TSF_LOOPMODE_NONE)); return;
582
                        case GEN_GROUP:      region->group           = amount->wordAmount;  return;
583
                        case GEN_KEYCENTER:  region->pitch_keycenter = amount->shortAmount; return;
584
                }
8752 terminx 585
        }
8775 terminx 586
        else //merge regions and clamp values
587
        {
588
                for (genOper = 0; genOper != _GEN_MAX; genOper++)
589
                {
590
                        int offset = genMetas[genOper].offset;
591
                        switch (genMetas[genOper].mode & _GEN_TYPE_MASK)
592
                        {
593
                                case GEN_FLOAT:
594
                                {
595
                                        float *val = &((float*)region)[offset], vfactor, vmin, vmax;
596
                                        *val += ((float*)merge_region)[offset];
597
                                        switch (genMetas[genOper].mode & _GEN_LIMIT_MASK)
598
                                        {
599
                                                case GEN_FLOAT_LIMIT12K5K: vfactor =   1.0f; vmin = -12000.0f; vmax = 5000.0f; break;
600
                                                case GEN_FLOAT_LIMIT12K8K: vfactor =   1.0f; vmin = -12000.0f; vmax = 8000.0f; break;
601
                                                case GEN_FLOAT_LIMIT1200:  vfactor =   1.0f; vmin =  -1200.0f; vmax = 1200.0f; break;
602
                                                case GEN_FLOAT_LIMITPAN:   vfactor = 0.001f; vmin =     -0.5f; vmax =    0.5f; break;
603
                                                case GEN_FLOAT_LIMITATTN:  vfactor =   0.1f; vmin =      0.0f; vmax =  144.0f; break;
604
                                                case GEN_FLOAT_MAX1000:    vfactor =   1.0f; vmin =      0.0f; vmax = 1000.0f; break;
605
                                                case GEN_FLOAT_MAX1440:    vfactor =   1.0f; vmin =      0.0f; vmax = 1440.0f; break;
606
                                                default: continue;
607
                                        }
608
                                        *val *= vfactor;
609
                                        if      (*val < vmin) *val = vmin;
610
                                        else if (*val > vmax) *val = vmax;
611
                                        continue;
612
                                }
613
                                case GEN_INT:
614
                                {
615
                                        int *val = &((int*)region)[offset], vmin, vmax;
616
                                        *val += ((int*)merge_region)[offset];
617
                                        switch (genMetas[genOper].mode & _GEN_LIMIT_MASK)
618
                                        {
619
                                                case GEN_INT_LIMIT12K:     vmin = -12000; vmax = 12000; break;
620
                                                case GEN_INT_LIMITFC:      vmin =   1500; vmax = 13500; break;
621
                                                case GEN_INT_LIMITQ:       vmin =      0; vmax =   960; break;
622
                                                case GEN_INT_LIMIT960:     vmin =   -960; vmax =   960; break;
623
                                                case GEN_INT_LIMIT16K4500: vmin = -16000; vmax =  4500; break;
624
                                                default: continue;
625
                                        }
626
                                        if      (*val < vmin) *val = vmin;
627
                                        else if (*val > vmax) *val = vmax;
628
                                        continue;
629
                                }
630
                                case GEN_UINT_ADD:
631
                                {
632
                                        ((unsigned int*)region)[offset] += ((unsigned int*)merge_region)[offset];
633
                                        continue;
634
                                }
635
                        }
636
                }
637
        }
8752 terminx 638
}
639
 
640
static void tsf_region_envtosecs(struct tsf_envelope* p, TSF_BOOL sustainIsGain)
641
{
642
        // EG times need to be converted from timecents to seconds.
643
        // Pin very short EG segments.  Timecents don't get to zero, and our EG is
644
        // happier with zero values.
645
        p->delay   = (p->delay   < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->delay));
646
        p->attack  = (p->attack  < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->attack));
647
        p->release = (p->release < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->release));
648
 
649
        // If we have dynamic hold or decay times depending on key number we need
650
        // to keep the values in timecents so we can calculate it during startNote
651
        if (!p->keynumToHold)  p->hold  = (p->hold  < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->hold));
652
        if (!p->keynumToDecay) p->decay = (p->decay < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->decay));
653
 
654
        if (p->sustain < 0.0f) p->sustain = 0.0f;
655
        else if (sustainIsGain) p->sustain = tsf_decibelsToGain(-p->sustain / 10.0f);
656
        else p->sustain = 1.0f - (p->sustain / 1000.0f);
657
}
658
 
659
static void tsf_load_presets(tsf* res, struct tsf_hydra *hydra, unsigned int fontSampleCount)
660
{
661
        enum { GenInstrument = 41, GenKeyRange = 43, GenVelRange = 44, GenSampleID = 53 };
662
        // Read each preset.
663
        struct tsf_hydra_phdr *pphdr, *pphdrMax;
664
        for (pphdr = hydra->phdrs, pphdrMax = pphdr + hydra->phdrNum - 1; pphdr != pphdrMax; pphdr++)
665
        {
666
                int sortedIndex = 0, region_index = 0;
667
                struct tsf_hydra_phdr *otherphdr;
668
                struct tsf_preset* preset;
669
                struct tsf_hydra_pbag *ppbag, *ppbagEnd;
670
                struct tsf_region globalRegion;
671
                for (otherphdr = hydra->phdrs; otherphdr != pphdrMax; otherphdr++)
672
                {
673
                        if (otherphdr == pphdr || otherphdr->bank > pphdr->bank) continue;
674
                        else if (otherphdr->bank < pphdr->bank) sortedIndex++;
675
                        else if (otherphdr->preset > pphdr->preset) continue;
676
                        else if (otherphdr->preset < pphdr->preset) sortedIndex++;
677
                        else if (otherphdr < pphdr) sortedIndex++;
678
                }
679
 
680
                preset = &res->presets[sortedIndex];
681
                TSF_MEMCPY(preset->presetName, pphdr->presetName, sizeof(preset->presetName));
682
                preset->presetName[sizeof(preset->presetName)-1] = '\0'; //should be zero terminated in source file but make sure
683
                preset->bank = pphdr->bank;
684
                preset->preset = pphdr->preset;
685
                preset->regionNum = 0;
686
 
687
                //count regions covered by this preset
688
                for (ppbag = hydra->pbags + pphdr->presetBagNdx, ppbagEnd = hydra->pbags + pphdr[1].presetBagNdx; ppbag != ppbagEnd; ppbag++)
689
                {
690
                        unsigned char plokey = 0, phikey = 127, plovel = 0, phivel = 127;
691
                        struct tsf_hydra_pgen *ppgen, *ppgenEnd; struct tsf_hydra_inst *pinst; struct tsf_hydra_ibag *pibag, *pibagEnd; struct tsf_hydra_igen *pigen, *pigenEnd;
692
                        for (ppgen = hydra->pgens + ppbag->genNdx, ppgenEnd = hydra->pgens + ppbag[1].genNdx; ppgen != ppgenEnd; ppgen++)
693
                        {
694
                                if (ppgen->genOper == GenKeyRange) { plokey = ppgen->genAmount.range.lo; phikey = ppgen->genAmount.range.hi; continue; }
695
                                if (ppgen->genOper == GenVelRange) { plovel = ppgen->genAmount.range.lo; phivel = ppgen->genAmount.range.hi; continue; }
696
                                if (ppgen->genOper != GenInstrument) continue;
697
                                if (ppgen->genAmount.wordAmount >= hydra->instNum) continue;
698
                                pinst = hydra->insts + ppgen->genAmount.wordAmount;
699
                                for (pibag = hydra->ibags + pinst->instBagNdx, pibagEnd = hydra->ibags + pinst[1].instBagNdx; pibag != pibagEnd; pibag++)
700
                                {
701
                                        unsigned char ilokey = 0, ihikey = 127, ilovel = 0, ihivel = 127;
702
                                        for (pigen = hydra->igens + pibag->instGenNdx, pigenEnd = hydra->igens + pibag[1].instGenNdx; pigen != pigenEnd; pigen++)
703
                                        {
704
                                                if (pigen->genOper == GenKeyRange) { ilokey = pigen->genAmount.range.lo; ihikey = pigen->genAmount.range.hi; continue; }
705
                                                if (pigen->genOper == GenVelRange) { ilovel = pigen->genAmount.range.lo; ihivel = pigen->genAmount.range.hi; continue; }
706
                                                if (pigen->genOper == GenSampleID && ihikey >= plokey && ilokey <= phikey && ihivel >= plovel && ilovel <= phivel) preset->regionNum++;
707
                                        }
708
                                }
709
                        }
710
                }
711
 
712
                preset->regions = (struct tsf_region*)TSF_MALLOC(preset->regionNum * sizeof(struct tsf_region));
713
                tsf_region_clear(&globalRegion, TSF_TRUE);
714
 
715
                // Zones.
716
                for (ppbag = hydra->pbags + pphdr->presetBagNdx, ppbagEnd = hydra->pbags + pphdr[1].presetBagNdx; ppbag != ppbagEnd; ppbag++)
717
                {
718
                        struct tsf_hydra_pgen *ppgen, *ppgenEnd; struct tsf_hydra_inst *pinst; struct tsf_hydra_ibag *pibag, *pibagEnd; struct tsf_hydra_igen *pigen, *pigenEnd;
719
                        struct tsf_region presetRegion = globalRegion;
720
                        int hadGenInstrument = 0;
721
 
722
                        // Generators.
723
                        for (ppgen = hydra->pgens + ppbag->genNdx, ppgenEnd = hydra->pgens + ppbag[1].genNdx; ppgen != ppgenEnd; ppgen++)
724
                        {
725
                                // Instrument.
726
                                if (ppgen->genOper == GenInstrument)
727
                                {
728
                                        struct tsf_region instRegion;
729
                                        tsf_u16 whichInst = ppgen->genAmount.wordAmount;
730
                                        if (whichInst >= hydra->instNum) continue;
731
 
732
                                        tsf_region_clear(&instRegion, TSF_FALSE);
733
                                        pinst = &hydra->insts[whichInst];
734
                                        for (pibag = hydra->ibags + pinst->instBagNdx, pibagEnd = hydra->ibags + pinst[1].instBagNdx; pibag != pibagEnd; pibag++)
735
                                        {
736
                                                // Generators.
737
                                                struct tsf_region zoneRegion = instRegion;
738
                                                int hadSampleID = 0;
739
                                                for (pigen = hydra->igens + pibag->instGenNdx, pigenEnd = hydra->igens + pibag[1].instGenNdx; pigen != pigenEnd; pigen++)
740
                                                {
741
                                                        if (pigen->genOper == GenSampleID)
742
                                                        {
743
                                                                struct tsf_hydra_shdr* pshdr;
744
 
745
                                                                //preset region key and vel ranges are a filter for the zone regions
746
                                                                if (zoneRegion.hikey < presetRegion.lokey || zoneRegion.lokey > presetRegion.hikey) continue;
747
                                                                if (zoneRegion.hivel < presetRegion.lovel || zoneRegion.lovel > presetRegion.hivel) continue;
748
                                                                if (presetRegion.lokey > zoneRegion.lokey) zoneRegion.lokey = presetRegion.lokey;
749
                                                                if (presetRegion.hikey < zoneRegion.hikey) zoneRegion.hikey = presetRegion.hikey;
750
                                                                if (presetRegion.lovel > zoneRegion.lovel) zoneRegion.lovel = presetRegion.lovel;
751
                                                                if (presetRegion.hivel < zoneRegion.hivel) zoneRegion.hivel = presetRegion.hivel;
752
 
753
                                                                //sum regions
8775 terminx 754
                                                                tsf_region_operator(&zoneRegion, 0, TSF_NULL, &presetRegion);
8752 terminx 755
 
756
                                                                // EG times need to be converted from timecents to seconds.
757
                                                                tsf_region_envtosecs(&zoneRegion.ampenv, TSF_TRUE);
758
                                                                tsf_region_envtosecs(&zoneRegion.modenv, TSF_FALSE);
759
 
760
                                                                // LFO times need to be converted from timecents to seconds.
761
                                                                zoneRegion.delayModLFO = (zoneRegion.delayModLFO < -11950.0f ? 0.0f : tsf_timecents2Secsf(zoneRegion.delayModLFO));
762
                                                                zoneRegion.delayVibLFO = (zoneRegion.delayVibLFO < -11950.0f ? 0.0f : tsf_timecents2Secsf(zoneRegion.delayVibLFO));
763
 
8775 terminx 764
                                                                // Fixup sample positions
8752 terminx 765
                                                                pshdr = &hydra->shdrs[pigen->genAmount.wordAmount];
766
                                                                zoneRegion.offset += pshdr->start;
767
                                                                zoneRegion.end += pshdr->end;
768
                                                                zoneRegion.loop_start += pshdr->startLoop;
769
                                                                zoneRegion.loop_end += pshdr->endLoop;
770
                                                                if (pshdr->endLoop > 0) zoneRegion.loop_end -= 1;
771
                                                                if (zoneRegion.pitch_keycenter == -1) zoneRegion.pitch_keycenter = pshdr->originalPitch;
772
                                                                zoneRegion.tune += pshdr->pitchCorrection;
773
                                                                zoneRegion.sample_rate = pshdr->sampleRate;
774
                                                                if (zoneRegion.end && zoneRegion.end < fontSampleCount) zoneRegion.end++;
775
                                                                else zoneRegion.end = fontSampleCount;
776
 
777
                                                                preset->regions[region_index] = zoneRegion;
778
                                                                region_index++;
779
                                                                hadSampleID = 1;
780
                                                        }
8775 terminx 781
                                                        else tsf_region_operator(&zoneRegion, pigen->genOper, &pigen->genAmount, TSF_NULL);
8752 terminx 782
                                                }
783
 
784
                                                // Handle instrument's global zone.
785
                                                if (pibag == hydra->ibags + pinst->instBagNdx && !hadSampleID)
786
                                                        instRegion = zoneRegion;
787
 
788
                                                // Modulators (TODO)
789
                                                //if (ibag->instModNdx < ibag[1].instModNdx) addUnsupportedOpcode("any modulator");
790
                                        }
791
                                        hadGenInstrument = 1;
792
                                }
8775 terminx 793
                                else tsf_region_operator(&presetRegion, ppgen->genOper, &ppgen->genAmount, TSF_NULL);
8752 terminx 794
                        }
795
 
796
                        // Modulators (TODO)
797
                        //if (pbag->modNdx < pbag[1].modNdx) addUnsupportedOpcode("any modulator");
798
 
799
                        // Handle preset's global zone.
800
                        if (ppbag == hydra->pbags + pphdr->presetBagNdx && !hadGenInstrument)
801
                                globalRegion = presetRegion;
802
                }
803
        }
804
}
805
 
806
static void tsf_load_samples(float** fontSamples, unsigned int* fontSampleCount, struct tsf_riffchunk *chunkSmpl, struct tsf_stream* stream)
807
{
808
        // Read sample data into float format buffer.
809
        float* out; unsigned int samplesLeft, samplesToRead, samplesToConvert;
810
        samplesLeft = *fontSampleCount = chunkSmpl->size / sizeof(short);
811
        out = *fontSamples = (float*)TSF_MALLOC(samplesLeft * sizeof(float));
812
        for (; samplesLeft; samplesLeft -= samplesToRead)
813
        {
814
                short sampleBuffer[1024], *in = sampleBuffer;;
815
                samplesToRead = (samplesLeft > 1024 ? 1024 : samplesLeft);
816
                stream->read(stream->data, sampleBuffer, samplesToRead * sizeof(short));
817
 
818
                // Convert from signed 16-bit to float.
819
                for (samplesToConvert = samplesToRead; samplesToConvert > 0; --samplesToConvert)
820
                        // If we ever need to compile for big-endian platforms, we'll need to byte-swap here.
821
                        *out++ = (float)(*in++ / 32767.0);
822
        }
823
}
824
 
825
static void tsf_voice_envelope_nextsegment(struct tsf_voice_envelope* e, short active_segment, float outSampleRate)
826
{
827
        switch (active_segment)
828
        {
829
                case TSF_SEGMENT_NONE:
830
                        e->samplesUntilNextSegment = (int)(e->parameters.delay * outSampleRate);
831
                        if (e->samplesUntilNextSegment > 0)
832
                        {
833
                                e->segment = TSF_SEGMENT_DELAY;
834
                                e->segmentIsExponential = TSF_FALSE;
835
                                e->level = 0.0;
836
                                e->slope = 0.0;
837
                                return;
838
                        }
839
                        /* fall through */
840
                case TSF_SEGMENT_DELAY:
841
                        e->samplesUntilNextSegment = (int)(e->parameters.attack * outSampleRate);
842
                        if (e->samplesUntilNextSegment > 0)
843
                        {
844
                                if (!e->isAmpEnv)
845
                                {
846
                                        //mod env attack duration scales with velocity (velocity of 1 is full duration, max velocity is 0.125 times duration)
847
                                        e->samplesUntilNextSegment = (int)(e->parameters.attack * ((145 - e->midiVelocity) / 144.0f) * outSampleRate);
848
                                }
849
                                e->segment = TSF_SEGMENT_ATTACK;
850
                                e->segmentIsExponential = TSF_FALSE;
851
                                e->level = 0.0f;
852
                                e->slope = 1.0f / e->samplesUntilNextSegment;
853
                                return;
854
                        }
855
                        /* fall through */
856
                case TSF_SEGMENT_ATTACK:
857
                        e->samplesUntilNextSegment = (int)(e->parameters.hold * outSampleRate);
858
                        if (e->samplesUntilNextSegment > 0)
859
                        {
860
                                e->segment = TSF_SEGMENT_HOLD;
861
                                e->segmentIsExponential = TSF_FALSE;
862
                                e->level = 1.0f;
863
                                e->slope = 0.0f;
864
                                return;
865
                        }
866
                        /* fall through */
867
                case TSF_SEGMENT_HOLD:
868
                        e->samplesUntilNextSegment = (int)(e->parameters.decay * outSampleRate);
869
                        if (e->samplesUntilNextSegment > 0)
870
                        {
871
                                e->segment = TSF_SEGMENT_DECAY;
872
                                e->level = 1.0f;
873
                                if (e->isAmpEnv)
874
                                {
875
                                        // I don't truly understand this; just following what LinuxSampler does.
876
                                        float mysterySlope = -9.226f / e->samplesUntilNextSegment;
877
                                        e->slope = TSF_EXPF(mysterySlope);
878
                                        e->segmentIsExponential = TSF_TRUE;
879
                                        if (e->parameters.sustain > 0.0f)
880
                                        {
881
                                                // Again, this is following LinuxSampler's example, which is similar to
882
                                                // SF2-style decay, where "decay" specifies the time it would take to
883
                                                // get to zero, not to the sustain level.  The SFZ spec is not that
884
                                                // specific about what "decay" means, so perhaps it's really supposed
885
                                                // to specify the time to reach the sustain level.
886
                                                e->samplesUntilNextSegment = (int)(TSF_LOG(e->parameters.sustain) / mysterySlope);
887
                                        }
888
                                }
889
                                else
890
                                {
891
                                        e->slope = -1.0f / e->samplesUntilNextSegment;
892
                                        e->samplesUntilNextSegment = (int)(e->parameters.decay * (1.0f - e->parameters.sustain) * outSampleRate);
893
                                        e->segmentIsExponential = TSF_FALSE;
894
                                }
895
                                return;
896
                        }
897
                        /* fall through */
898
                case TSF_SEGMENT_DECAY:
899
                        e->segment = TSF_SEGMENT_SUSTAIN;
900
                        e->level = e->parameters.sustain;
901
                        e->slope = 0.0f;
902
                        e->samplesUntilNextSegment = 0x7FFFFFFF;
903
                        e->segmentIsExponential = TSF_FALSE;
904
                        return;
905
                case TSF_SEGMENT_SUSTAIN:
906
                        e->segment = TSF_SEGMENT_RELEASE;
907
                        e->samplesUntilNextSegment = (int)((e->parameters.release <= 0 ? TSF_FASTRELEASETIME : e->parameters.release) * outSampleRate);
908
                        if (e->isAmpEnv)
909
                        {
910
                                // I don't truly understand this; just following what LinuxSampler does.
911
                                float mysterySlope = -9.226f / e->samplesUntilNextSegment;
912
                                e->slope = TSF_EXPF(mysterySlope);
913
                                e->segmentIsExponential = TSF_TRUE;
914
                        }
915
                        else
916
                        {
917
                                e->slope = -e->level / e->samplesUntilNextSegment;
918
                                e->segmentIsExponential = TSF_FALSE;
919
                        }
920
                        return;
921
                case TSF_SEGMENT_RELEASE:
922
                default:
923
                        e->segment = TSF_SEGMENT_DONE;
924
                        e->segmentIsExponential = TSF_FALSE;
925
                        e->level = e->slope = 0.0f;
926
                        e->samplesUntilNextSegment = 0x7FFFFFF;
927
        }
928
}
929
 
930
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)
931
{
932
        e->parameters = *new_parameters;
933
        if (e->parameters.keynumToHold)
934
        {
935
                e->parameters.hold += e->parameters.keynumToHold * (60.0f - midiNoteNumber);
936
                e->parameters.hold = (e->parameters.hold < -10000.0f ? 0.0f : tsf_timecents2Secsf(e->parameters.hold));
937
        }
938
        if (e->parameters.keynumToDecay)
939
        {
940
                e->parameters.decay += e->parameters.keynumToDecay * (60.0f - midiNoteNumber);
941
                e->parameters.decay = (e->parameters.decay < -10000.0f ? 0.0f : tsf_timecents2Secsf(e->parameters.decay));
942
        }
943
        e->midiVelocity = midiVelocity;
944
        e->isAmpEnv = isAmpEnv;
945
        tsf_voice_envelope_nextsegment(e, TSF_SEGMENT_NONE, outSampleRate);
946
}
947
 
948
static void tsf_voice_envelope_process(struct tsf_voice_envelope* e, int numSamples, float outSampleRate)
949
{
950
        if (e->slope)
951
        {
952
                if (e->segmentIsExponential) e->level *= TSF_POWF(e->slope, (float)numSamples);
953
                else e->level += (e->slope * numSamples);
954
        }
955
        if ((e->samplesUntilNextSegment -= numSamples) <= 0)
956
                tsf_voice_envelope_nextsegment(e, e->segment, outSampleRate);
957
}
958
 
959
static void tsf_voice_lowpass_setup(struct tsf_voice_lowpass* e, float Fc)
960
{
961
        // Lowpass filter from http://www.earlevel.com/main/2012/11/26/biquad-c-source-code/
962
        double K = TSF_TAN(TSF_PI * Fc), KK = K * K;
963
        double norm = 1 / (1 + K * e->QInv + KK);
964
        e->a0 = KK * norm;
965
        e->a1 = 2 * e->a0;
966
        e->b1 = 2 * (KK - 1) * norm;
967
        e->b2 = (1 - K * e->QInv + KK) * norm;
968
}
969
 
970
static float tsf_voice_lowpass_process(struct tsf_voice_lowpass* e, double In)
971
{
972
        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;
973
}
974
 
975
static void tsf_voice_lfo_setup(struct tsf_voice_lfo* e, float delay, int freqCents, float outSampleRate)
976
{
977
        e->samplesUntil = (int)(delay * outSampleRate);
978
        e->delta = (4.0f * tsf_cents2Hertz((float)freqCents) / outSampleRate);
979
        e->level = 0;
980
}
981
 
982
static void tsf_voice_lfo_process(struct tsf_voice_lfo* e, int blockSamples)
983
{
984
        if (e->samplesUntil > blockSamples) { e->samplesUntil -= blockSamples; return; }
985
        e->level += e->delta * blockSamples;
986
        if      (e->level >  1.0f) { e->delta = -e->delta; e->level =  2.0f - e->level; }
987
        else if (e->level < -1.0f) { e->delta = -e->delta; e->level = -2.0f - e->level; }
988
}
989
 
990
static void tsf_voice_kill(struct tsf_voice* v)
991
{
992
        v->playingPreset = -1;
993
}
994
 
995
static void tsf_voice_end(struct tsf_voice* v, float outSampleRate)
996
{
997
        tsf_voice_envelope_nextsegment(&v->ampenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
998
        tsf_voice_envelope_nextsegment(&v->modenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
999
        if (v->region->loop_mode == TSF_LOOPMODE_SUSTAIN)
1000
        {
1001
                // Continue playing, but stop looping.
1002
                v->loopEnd = v->loopStart;
1003
        }
1004
}
1005
 
1006
static void tsf_voice_endquick(struct tsf_voice* v, float outSampleRate)
1007
{
1008
        v->ampenv.parameters.release = 0.0f; tsf_voice_envelope_nextsegment(&v->ampenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
1009
        v->modenv.parameters.release = 0.0f; tsf_voice_envelope_nextsegment(&v->modenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
1010
}
1011
 
1012
static void tsf_voice_calcpitchratio(struct tsf_voice* v, float pitchShift, float outSampleRate)
1013
{
1014
        double note = v->playingKey + v->region->transpose + v->region->tune / 100.0;
1015
        double adjustedPitch = v->region->pitch_keycenter + (note - v->region->pitch_keycenter) * (v->region->pitch_keytrack / 100.0);
1016
        if (pitchShift) adjustedPitch += pitchShift;
1017
        v->pitchInputTimecents = adjustedPitch * 100.0;
1018
        v->pitchOutputFactor = v->region->sample_rate / (tsf_timecents2Secsd(v->region->pitch_keycenter * 100.0) * outSampleRate);
1019
}
1020
 
1021
static void tsf_voice_render(tsf* f, struct tsf_voice* v, float* outputBuffer, int numSamples)
1022
{
1023
        struct tsf_region* region = v->region;
1024
        float* input = f->fontSamples;
1025
        float* outL = outputBuffer;
1026
        float* outR = (f->outputmode == TSF_STEREO_UNWEAVED ? outL + numSamples : TSF_NULL);
1027
 
1028
        // Cache some values, to give them at least some chance of ending up in registers.
1029
        TSF_BOOL updateModEnv = (region->modEnvToPitch || region->modEnvToFilterFc);
1030
        TSF_BOOL updateModLFO = (v->modlfo.delta && (region->modLfoToPitch || region->modLfoToFilterFc || region->modLfoToVolume));
1031
        TSF_BOOL updateVibLFO = (v->viblfo.delta && (region->vibLfoToPitch));
1032
        TSF_BOOL isLooping    = (v->loopStart < v->loopEnd);
1033
        unsigned int tmpLoopStart = v->loopStart, tmpLoopEnd = v->loopEnd;
1034
        double tmpSampleEndDbl = (double)region->end, tmpLoopEndDbl = (double)tmpLoopEnd + 1.0;
1035
        double tmpSourceSamplePosition = v->sourceSamplePosition;
1036
        struct tsf_voice_lowpass tmpLowpass = v->lowpass;
1037
 
1038
        TSF_BOOL dynamicLowpass = (region->modLfoToFilterFc || region->modEnvToFilterFc);
8784 terminx 1039
        float tmpSampleRate = f->outSampleRate, tmpInitialFilterFc, tmpModLfoToFilterFc, tmpModEnvToFilterFc;
8752 terminx 1040
 
1041
        TSF_BOOL dynamicPitchRatio = (region->modLfoToPitch || region->modEnvToPitch || region->vibLfoToPitch);
1042
        double pitchRatio;
1043
        float tmpModLfoToPitch, tmpVibLfoToPitch, tmpModEnvToPitch;
1044
 
1045
        TSF_BOOL dynamicGain = (region->modLfoToVolume != 0);
1046
        float noteGain = 0, tmpModLfoToVolume;
1047
 
8784 terminx 1048
        if (dynamicLowpass) tmpInitialFilterFc = (float)region->initialFilterFc, tmpModLfoToFilterFc = (float)region->modLfoToFilterFc, tmpModEnvToFilterFc = (float)region->modEnvToFilterFc;
1049
        else tmpInitialFilterFc = 0, tmpModLfoToFilterFc = 0, tmpModEnvToFilterFc = 0;
8752 terminx 1050
 
1051
        if (dynamicPitchRatio) pitchRatio = 0, tmpModLfoToPitch = (float)region->modLfoToPitch, tmpVibLfoToPitch = (float)region->vibLfoToPitch, tmpModEnvToPitch = (float)region->modEnvToPitch;
1052
        else pitchRatio = tsf_timecents2Secsd(v->pitchInputTimecents) * v->pitchOutputFactor, tmpModLfoToPitch = 0, tmpVibLfoToPitch = 0, tmpModEnvToPitch = 0;
1053
 
1054
        if (dynamicGain) tmpModLfoToVolume = (float)region->modLfoToVolume * 0.1f;
1055
        else noteGain = tsf_decibelsToGain(v->noteGainDB), tmpModLfoToVolume = 0;
1056
 
1057
        while (numSamples)
1058
        {
1059
                float gainMono, gainLeft, gainRight;
1060
                int blockSamples = (numSamples > TSF_RENDER_EFFECTSAMPLEBLOCK ? TSF_RENDER_EFFECTSAMPLEBLOCK : numSamples);
1061
                numSamples -= blockSamples;
1062
 
1063
                if (dynamicLowpass)
1064
                {
1065
                        float fres = tmpInitialFilterFc + v->modlfo.level * tmpModLfoToFilterFc + v->modenv.level * tmpModEnvToFilterFc;
8775 terminx 1066
                        float lowpassFc = (fres <= 13500 ? tsf_cents2Hertz(fres) / tmpSampleRate : 1.0f);
8770 terminx 1067
                        tmpLowpass.active = (lowpassFc < 0.499f);
1068
                        if (tmpLowpass.active) tsf_voice_lowpass_setup(&tmpLowpass, lowpassFc);
8752 terminx 1069
                }
1070
 
1071
                if (dynamicPitchRatio)
1072
                        pitchRatio = tsf_timecents2Secsd(v->pitchInputTimecents + (v->modlfo.level * tmpModLfoToPitch + v->viblfo.level * tmpVibLfoToPitch + v->modenv.level * tmpModEnvToPitch)) * v->pitchOutputFactor;
1073
 
1074
                if (dynamicGain)
1075
                        noteGain = tsf_decibelsToGain(v->noteGainDB + (v->modlfo.level * tmpModLfoToVolume));
1076
 
1077
                gainMono = noteGain * v->ampenv.level;
1078
 
1079
                // Update EG.
8775 terminx 1080
                tsf_voice_envelope_process(&v->ampenv, blockSamples, tmpSampleRate);
1081
                if (updateModEnv) tsf_voice_envelope_process(&v->modenv, blockSamples, tmpSampleRate);
8752 terminx 1082
 
1083
                // Update LFOs.
1084
                if (updateModLFO) tsf_voice_lfo_process(&v->modlfo, blockSamples);
1085
                if (updateVibLFO) tsf_voice_lfo_process(&v->viblfo, blockSamples);
1086
 
1087
                switch (f->outputmode)
1088
                {
1089
                        case TSF_STEREO_INTERLEAVED:
1090
                                gainLeft = gainMono * v->panFactorLeft, gainRight = gainMono * v->panFactorRight;
1091
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1092
                                {
1093
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1094
 
1095
                                        // Simple linear interpolation.
1096
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1097
 
1098
                                        // Low-pass filter.
1099
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1100
 
1101
                                        *outL++ += val * gainLeft;
1102
                                        *outL++ += val * gainRight;
1103
 
1104
                                        // Next sample.
1105
                                        tmpSourceSamplePosition += pitchRatio;
1106
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1107
                                }
1108
                                break;
1109
 
1110
                        case TSF_STEREO_UNWEAVED:
1111
                                gainLeft = gainMono * v->panFactorLeft, gainRight = gainMono * v->panFactorRight;
1112
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1113
                                {
1114
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1115
 
1116
                                        // Simple linear interpolation.
1117
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1118
 
1119
                                        // Low-pass filter.
1120
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1121
 
1122
                                        *outL++ += val * gainLeft;
1123
                                        *outR++ += val * gainRight;
1124
 
1125
                                        // Next sample.
1126
                                        tmpSourceSamplePosition += pitchRatio;
1127
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1128
                                }
1129
                                break;
1130
 
1131
                        case TSF_MONO:
1132
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1133
                                {
1134
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1135
 
1136
                                        // Simple linear interpolation.
1137
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1138
 
1139
                                        // Low-pass filter.
1140
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1141
 
1142
                                        *outL++ += val * gainMono;
1143
 
1144
                                        // Next sample.
1145
                                        tmpSourceSamplePosition += pitchRatio;
1146
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1147
                                }
1148
                                break;
1149
                }
1150
 
1151
                if (tmpSourceSamplePosition >= tmpSampleEndDbl || v->ampenv.segment == TSF_SEGMENT_DONE)
1152
                {
1153
                        tsf_voice_kill(v);
1154
                        return;
1155
                }
1156
        }
1157
 
1158
        v->sourceSamplePosition = tmpSourceSamplePosition;
1159
        if (tmpLowpass.active || dynamicLowpass) v->lowpass = tmpLowpass;
1160
}
1161
 
1162
TSFDEF tsf* tsf_load(struct tsf_stream* stream)
1163
{
1164
        tsf* res = TSF_NULL;
1165
        struct tsf_riffchunk chunkHead;
1166
        struct tsf_riffchunk chunkList;
1167
        struct tsf_hydra hydra;
1168
        float* fontSamples = TSF_NULL;
1169
        unsigned int fontSampleCount = 0;
1170
 
1171
        if (!tsf_riffchunk_read(TSF_NULL, &chunkHead, stream) || !TSF_FourCCEquals(chunkHead.id, "sfbk"))
1172
        {
1173
                //if (e) *e = TSF_INVALID_NOSF2HEADER;
1174
                return res;
1175
        }
1176
 
1177
        // Read hydra and locate sample data.
1178
        TSF_MEMSET(&hydra, 0, sizeof(hydra));
1179
        while (tsf_riffchunk_read(&chunkHead, &chunkList, stream))
1180
        {
1181
                struct tsf_riffchunk chunk;
1182
                if (TSF_FourCCEquals(chunkList.id, "pdta"))
1183
                {
1184
                        while (tsf_riffchunk_read(&chunkList, &chunk, stream))
1185
                        {
1186
                                #define HandleChunk(chunkName) (TSF_FourCCEquals(chunk.id, #chunkName) && !(chunk.size % chunkName##SizeInFile)) \
1187
                                        { \
1188
                                                int num = chunk.size / chunkName##SizeInFile, i; \
1189
                                                hydra.chunkName##Num = num; \
1190
                                                hydra.chunkName##s = (struct tsf_hydra_##chunkName*)TSF_MALLOC(num * sizeof(struct tsf_hydra_##chunkName)); \
1191
                                                for (i = 0; i < num; ++i) tsf_hydra_read_##chunkName(&hydra.chunkName##s[i], stream); \
1192
                                        }
1193
                                enum
1194
                                {
1195
                                        phdrSizeInFile = 38, pbagSizeInFile =  4, pmodSizeInFile = 10,
1196
                                        pgenSizeInFile =  4, instSizeInFile = 22, ibagSizeInFile =  4,
1197
                                        imodSizeInFile = 10, igenSizeInFile =  4, shdrSizeInFile = 46
1198
                                };
1199
                                if      HandleChunk(phdr) else if HandleChunk(pbag) else if HandleChunk(pmod)
1200
                                else if HandleChunk(pgen) else if HandleChunk(inst) else if HandleChunk(ibag)
1201
                                else if HandleChunk(imod) else if HandleChunk(igen) else if HandleChunk(shdr)
1202
                                else stream->skip(stream->data, chunk.size);
1203
                                #undef HandleChunk
1204
                        }
1205
                }
1206
                else if (TSF_FourCCEquals(chunkList.id, "sdta"))
1207
                {
1208
                        while (tsf_riffchunk_read(&chunkList, &chunk, stream))
1209
                        {
1210
                                if (TSF_FourCCEquals(chunk.id, "smpl"))
1211
                                {
1212
                                        tsf_load_samples(&fontSamples, &fontSampleCount, &chunk, stream);
1213
                                }
1214
                                else stream->skip(stream->data, chunk.size);
1215
                        }
1216
                }
1217
                else stream->skip(stream->data, chunkList.size);
1218
        }
1219
        if (!hydra.phdrs || !hydra.pbags || !hydra.pmods || !hydra.pgens || !hydra.insts || !hydra.ibags || !hydra.imods || !hydra.igens || !hydra.shdrs)
1220
        {
1221
                //if (e) *e = TSF_INVALID_INCOMPLETE;
1222
        }
1223
        else if (fontSamples == TSF_NULL)
1224
        {
1225
                //if (e) *e = TSF_INVALID_NOSAMPLEDATA;
1226
        }
1227
        else
1228
        {
1229
                res = (tsf*)TSF_MALLOC(sizeof(tsf));
1230
                TSF_MEMSET(res, 0, sizeof(tsf));
1231
                res->presetNum = hydra.phdrNum - 1;
1232
                res->presets = (struct tsf_preset*)TSF_MALLOC(res->presetNum * sizeof(struct tsf_preset));
1233
                res->fontSamples = fontSamples;
1234
                res->outSampleRate = 44100.0f;
1235
                fontSamples = TSF_NULL; //don't free below
1236
                tsf_load_presets(res, &hydra, fontSampleCount);
1237
        }
1238
        TSF_FREE(hydra.phdrs); TSF_FREE(hydra.pbags); TSF_FREE(hydra.pmods);
1239
        TSF_FREE(hydra.pgens); TSF_FREE(hydra.insts); TSF_FREE(hydra.ibags);
1240
        TSF_FREE(hydra.imods); TSF_FREE(hydra.igens); TSF_FREE(hydra.shdrs);
1241
        TSF_FREE(fontSamples);
1242
        return res;
1243
}
1244
 
1245
TSFDEF void tsf_close(tsf* f)
1246
{
1247
        struct tsf_preset *preset, *presetEnd;
1248
        if (!f) return;
1249
        for (preset = f->presets, presetEnd = preset + f->presetNum; preset != presetEnd; preset++)
1250
                TSF_FREE(preset->regions);
1251
        TSF_FREE(f->presets);
1252
        TSF_FREE(f->fontSamples);
1253
        TSF_FREE(f->voices);
1254
        if (f->channels) { TSF_FREE(f->channels->channels); TSF_FREE(f->channels); }
1255
        TSF_FREE(f->outputSamples);
1256
        TSF_FREE(f);
1257
}
1258
 
1259
TSFDEF void tsf_reset(tsf* f)
1260
{
1261
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1262
        for (; v != vEnd; v++)
1263
                if (v->playingPreset != -1 && (v->ampenv.segment < TSF_SEGMENT_RELEASE || v->ampenv.parameters.release))
1264
                        tsf_voice_endquick(v, f->outSampleRate);
1265
        if (f->channels) { TSF_FREE(f->channels->channels); TSF_FREE(f->channels); f->channels = TSF_NULL; }
1266
}
1267
 
1268
TSFDEF int tsf_get_presetindex(const tsf* f, int bank, int preset_number)
1269
{
1270
        const struct tsf_preset *presets;
1271
        int i, iMax;
1272
        for (presets = f->presets, i = 0, iMax = f->presetNum; i < iMax; i++)
1273
                if (presets[i].preset == preset_number && presets[i].bank == bank)
1274
                        return i;
1275
        return -1;
1276
}
1277
 
1278
TSFDEF int tsf_get_presetcount(const tsf* f)
1279
{
1280
        return f->presetNum;
1281
}
1282
 
1283
TSFDEF const char* tsf_get_presetname(const tsf* f, int preset)
1284
{
1285
        return (preset < 0 || preset >= f->presetNum ? TSF_NULL : f->presets[preset].presetName);
1286
}
1287
 
1288
TSFDEF const char* tsf_bank_get_presetname(const tsf* f, int bank, int preset_number)
1289
{
1290
        return tsf_get_presetname(f, tsf_get_presetindex(f, bank, preset_number));
1291
}
1292
 
1293
TSFDEF void tsf_set_output(tsf* f, enum TSFOutputMode outputmode, int samplerate, float global_gain_db)
1294
{
1295
        f->outputmode = outputmode;
1296
        f->outSampleRate = (float)(samplerate >= 1 ? samplerate : 44100.0f);
1297
        f->globalGainDB = global_gain_db;
1298
}
1299
 
1300
TSFDEF void tsf_note_on(tsf* f, int preset_index, int key, float vel)
1301
{
1302
        short midiVelocity = (short)(vel * 127);
1303
        int voicePlayIndex;
1304
        struct tsf_region *region, *regionEnd;
1305
 
1306
        if (preset_index < 0 || preset_index >= f->presetNum) return;
1307
        if (vel <= 0.0f) { tsf_note_off(f, preset_index, key); return; }
1308
 
1309
        // Play all matching regions.
1310
        voicePlayIndex = f->voicePlayIndex++;
1311
        for (region = f->presets[preset_index].regions, regionEnd = region + f->presets[preset_index].regionNum; region != regionEnd; region++)
1312
        {
8770 terminx 1313
                struct tsf_voice *voice, *v, *vEnd; TSF_BOOL doLoop; float lowpassFilterQDB, lowpassFc;
8752 terminx 1314
                if (key < region->lokey || key > region->hikey || midiVelocity < region->lovel || midiVelocity > region->hivel) continue;
1315
 
1316
                voice = TSF_NULL, v = f->voices, vEnd = v + f->voiceNum;
1317
                if (region->group)
1318
                {
1319
                        for (; v != vEnd; v++)
1320
                                if (v->playingPreset == preset_index && v->region->group == region->group) tsf_voice_endquick(v, f->outSampleRate);
1321
                                else if (v->playingPreset == -1 && !voice) voice = v;
1322
                }
1323
                else for (; v != vEnd; v++) if (v->playingPreset == -1) { voice = v; break; }
1324
 
1325
                if (!voice)
1326
                {
1327
                        f->voiceNum += 4;
1328
                        f->voices = (struct tsf_voice*)TSF_REALLOC(f->voices, f->voiceNum * sizeof(struct tsf_voice));
1329
                        voice = &f->voices[f->voiceNum - 4];
1330
                        voice[1].playingPreset = voice[2].playingPreset = voice[3].playingPreset = -1;
1331
                }
1332
 
1333
                voice->region = region;
1334
                voice->playingPreset = preset_index;
1335
                voice->playingKey = key;
1336
                voice->playIndex = voicePlayIndex;
8775 terminx 1337
                voice->noteGainDB = f->globalGainDB - region->attenuation - tsf_gainToDecibels(1.0f / vel);
8752 terminx 1338
 
1339
                if (f->channels)
1340
                {
1341
                        f->channels->setupVoice(f, voice);
1342
                }
1343
                else
1344
                {
1345
                        tsf_voice_calcpitchratio(voice, 0, f->outSampleRate);
1346
                        // 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).
1347
                        voice->panFactorLeft  = TSF_SQRTF(0.5f - region->pan);
1348
                        voice->panFactorRight = TSF_SQRTF(0.5f + region->pan);
1349
                }
1350
 
1351
                // Offset/end.
1352
                voice->sourceSamplePosition = region->offset;
1353
 
1354
                // Loop.
1355
                doLoop = (region->loop_mode != TSF_LOOPMODE_NONE && region->loop_start < region->loop_end);
1356
                voice->loopStart = (doLoop ? region->loop_start : 0);
1357
                voice->loopEnd = (doLoop ? region->loop_end : 0);
1358
 
1359
                // Setup envelopes.
1360
                tsf_voice_envelope_setup(&voice->ampenv, &region->ampenv, key, midiVelocity, TSF_TRUE, f->outSampleRate);
1361
                tsf_voice_envelope_setup(&voice->modenv, &region->modenv, key, midiVelocity, TSF_FALSE, f->outSampleRate);
1362
 
1363
                // Setup lowpass filter.
8770 terminx 1364
                lowpassFc = (region->initialFilterFc <= 13500 ? tsf_cents2Hertz((float)region->initialFilterFc) / f->outSampleRate : 1.0f);
1365
                lowpassFilterQDB = region->initialFilterQ / 10.0f;
1366
                voice->lowpass.QInv = 1.0 / TSF_POW(10.0, (lowpassFilterQDB / 20.0));
8752 terminx 1367
                voice->lowpass.z1 = voice->lowpass.z2 = 0;
8770 terminx 1368
                voice->lowpass.active = (lowpassFc < 0.499f);
1369
                if (voice->lowpass.active) tsf_voice_lowpass_setup(&voice->lowpass, lowpassFc);
8752 terminx 1370
 
1371
                // Setup LFO filters.
1372
                tsf_voice_lfo_setup(&voice->modlfo, region->delayModLFO, region->freqModLFO, f->outSampleRate);
1373
                tsf_voice_lfo_setup(&voice->viblfo, region->delayVibLFO, region->freqVibLFO, f->outSampleRate);
1374
        }
1375
}
1376
 
1377
TSFDEF int tsf_bank_note_on(tsf* f, int bank, int preset_number, int key, float vel)
1378
{
1379
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1380
        if (preset_index == -1) return 0;
1381
        tsf_note_on(f, preset_index, key, vel);
1382
        return 1;
1383
}
1384
 
1385
TSFDEF void tsf_note_off(tsf* f, int preset_index, int key)
1386
{
1387
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum, *vMatchFirst = TSF_NULL, *vMatchLast = TSF_NULL;
1388
        for (; v != vEnd; v++)
1389
        {
1390
                //Find the first and last entry in the voices list with matching preset, key and look up the smallest play index
1391
                if (v->playingPreset != preset_index || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE) continue;
1392
                else if (!vMatchFirst || v->playIndex < vMatchFirst->playIndex) vMatchFirst = vMatchLast = v;
1393
                else if (v->playIndex == vMatchFirst->playIndex) vMatchLast = v;
1394
        }
1395
        if (!vMatchFirst) return;
1396
        for (v = vMatchFirst; v <= vMatchLast; v++)
1397
        {
1398
                //Stop all voices with matching preset, key and the smallest play index which was enumerated above
1399
                if (v != vMatchFirst && v != vMatchLast &&
1400
                        (v->playIndex != vMatchFirst->playIndex || v->playingPreset != preset_index || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE)) continue;
1401
                tsf_voice_end(v, f->outSampleRate);
1402
        }
1403
}
1404
 
1405
TSFDEF int tsf_bank_note_off(tsf* f, int bank, int preset_number, int key)
1406
{
1407
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1408
        if (preset_index == -1) return 0;
1409
        tsf_note_off(f, preset_index, key);
1410
        return 1;
1411
}
1412
 
1413
TSFDEF void tsf_note_off_all(tsf* f)
1414
{
1415
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1416
        for (; v != vEnd; v++) if (v->playingPreset != -1 && v->ampenv.segment < TSF_SEGMENT_RELEASE)
1417
                tsf_voice_end(v, f->outSampleRate);
1418
}
1419
 
1420
TSFDEF int tsf_active_voice_count(tsf* f)
1421
{
1422
        int count = 0;
1423
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1424
        for (; v != vEnd; v++) if (v->playingPreset != -1) count++;
1425
        return count;
1426
}
1427
 
1428
TSFDEF void tsf_render_short(tsf* f, short* buffer, int samples, int flag_mixing)
1429
{
1430
        float *floatSamples;
1431
        int channelSamples = (f->outputmode == TSF_MONO ? 1 : 2) * samples, floatBufferSize = channelSamples * sizeof(float);
1432
        short* bufferEnd = buffer + channelSamples;
1433
        if (floatBufferSize > f->outputSampleSize)
1434
        {
1435
                TSF_FREE(f->outputSamples);
1436
                f->outputSamples = (float*)TSF_MALLOC(floatBufferSize);
1437
                f->outputSampleSize = floatBufferSize;
1438
        }
1439
 
1440
        tsf_render_float(f, f->outputSamples, samples, TSF_FALSE);
1441
 
1442
        floatSamples = f->outputSamples;
1443
        if (flag_mixing)
1444
                while (buffer != bufferEnd)
1445
                {
1446
                        float v = *floatSamples++;
1447
                        int vi = *buffer + (v < -1.00004566f ? (int)-32768 : (v > 1.00001514f ? (int)32767 : (int)(v * 32767.5f)));
1448
                        *buffer++ = (vi < -32768 ? (short)-32768 : (vi > 32767 ? (short)32767 : (short)vi));
1449
                }
1450
        else
1451
                while (buffer != bufferEnd)
1452
                {
1453
                        float v = *floatSamples++;
1454
                        *buffer++ = (v < -1.00004566f ? (short)-32768 : (v > 1.00001514f ? (short)32767 : (short)(v * 32767.5f)));
1455
                }
1456
}
1457
 
1458
TSFDEF void tsf_render_float(tsf* f, float* buffer, int samples, int flag_mixing)
1459
{
1460
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1461
        if (!flag_mixing) TSF_MEMSET(buffer, 0, (f->outputmode == TSF_MONO ? 1 : 2) * sizeof(float) * samples);
1462
        for (; v != vEnd; v++)
1463
                if (v->playingPreset != -1)
1464
                        tsf_voice_render(f, v, buffer, samples);
1465
}
1466
 
1467
static void tsf_channel_setup_voice(tsf* f, struct tsf_voice* v)
1468
{
1469
        struct tsf_channel* c = &f->channels->channels[f->channels->activeChannel];
1470
        float newpan = v->region->pan + c->panOffset;
1471
        v->playingChannel = f->channels->activeChannel;
1472
        v->noteGainDB += c->gainDB;
1473
        tsf_voice_calcpitchratio(v, (c->pitchWheel == 8192 ? c->tuning : ((c->pitchWheel / 16383.0f * c->pitchRange * 2.0f) - c->pitchRange + c->tuning)), f->outSampleRate);
1474
        if      (newpan <= -0.5f) { v->panFactorLeft = 1.0f; v->panFactorRight = 0.0f; }
1475
        else if (newpan >=  0.5f) { v->panFactorLeft = 0.0f; v->panFactorRight = 1.0f; }
1476
        else { v->panFactorLeft = TSF_SQRTF(0.5f - newpan); v->panFactorRight = TSF_SQRTF(0.5f + newpan); }
1477
}
1478
 
1479
static struct tsf_channel* tsf_channel_init(tsf* f, int channel)
1480
{
1481
        int i;
1482
        if (f->channels && channel < f->channels->channelNum) return &f->channels->channels[channel];
1483
        if (!f->channels)
1484
        {
1485
                f->channels = (struct tsf_channels*)TSF_MALLOC(sizeof(struct tsf_channels));
1486
                f->channels->setupVoice = &tsf_channel_setup_voice;
1487
                f->channels->channels = NULL;
1488
                f->channels->channelNum = 0;
1489
                f->channels->activeChannel = 0;
1490
        }
1491
        i = f->channels->channelNum;
1492
        f->channels->channelNum = channel + 1;
1493
        f->channels->channels = (struct tsf_channel*)TSF_REALLOC(f->channels->channels, f->channels->channelNum * sizeof(struct tsf_channel));
1494
        for (; i <= channel; i++)
1495
        {
1496
                struct tsf_channel* c = &f->channels->channels[i];
1497
                c->presetIndex = c->bank = 0;
1498
                c->pitchWheel = c->midiPan = 8192;
1499
                c->midiVolume = c->midiExpression = 16383;
1500
                c->midiRPN = 0xFFFF;
1501
                c->midiData = 0;
1502
                c->panOffset = 0.0f;
1503
                c->gainDB = 0.0f;
1504
                c->pitchRange = 2.0f;
1505
                c->tuning = 0.0f;
1506
        }
1507
        return &f->channels->channels[channel];
1508
}
1509
 
1510
static void tsf_channel_applypitch(tsf* f, int channel, struct tsf_channel* c)
1511
{
1512
        struct tsf_voice *v, *vEnd;
1513
        float pitchShift = (c->pitchWheel == 8192 ? c->tuning : ((c->pitchWheel / 16383.0f * c->pitchRange * 2.0f) - c->pitchRange + c->tuning));
1514
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1515
                if (v->playingChannel == channel && v->playingPreset != -1)
1516
                        tsf_voice_calcpitchratio(v, pitchShift, f->outSampleRate);
1517
}
1518
 
1519
TSFDEF void tsf_channel_set_presetindex(tsf* f, int channel, int preset_index)
1520
{
1521
        tsf_channel_init(f, channel)->presetIndex = (unsigned short)preset_index;
1522
}
1523
 
1524
TSFDEF int tsf_channel_set_presetnumber(tsf* f, int channel, int preset_number, int flag_mididrums)
1525
{
1526
        struct tsf_channel *c = tsf_channel_init(f, channel);
1527
        int preset_index;
1528
        if (flag_mididrums)
1529
        {
1530
                preset_index = tsf_get_presetindex(f, 128 | (c->bank & 0x7FFF), preset_number);
1531
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, 128, preset_number);
1532
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, 128, 0);
1533
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, (c->bank & 0x7FFF), preset_number);
1534
        }
1535
        else preset_index = tsf_get_presetindex(f, (c->bank & 0x7FFF), preset_number);
1536
        if (preset_index == -1) preset_index = tsf_get_presetindex(f, 0, preset_number);
1537
        if (preset_index != -1)
1538
        {
1539
                c->presetIndex = (unsigned short)preset_index;
1540
                return 1;
1541
        }
1542
        return 0;
1543
}
1544
 
1545
TSFDEF void tsf_channel_set_bank(tsf* f, int channel, int bank)
1546
{
1547
        tsf_channel_init(f, channel)->bank = (unsigned short)bank;
1548
}
1549
 
1550
TSFDEF int tsf_channel_set_bank_preset(tsf* f, int channel, int bank, int preset_number)
1551
{
1552
        struct tsf_channel *c = tsf_channel_init(f, channel);
1553
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1554
        if (preset_index == -1) return 0;
1555
        c->presetIndex = (unsigned short)preset_index;
1556
        c->bank = (unsigned short)bank;
1557
        return 1;
1558
}
1559
 
1560
TSFDEF void tsf_channel_set_pan(tsf* f, int channel, float pan)
1561
{
1562
        struct tsf_voice *v, *vEnd;
1563
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1564
                if (v->playingChannel == channel && v->playingPreset != -1)
1565
                {
1566
                        float newpan = v->region->pan + pan - 0.5f;
1567
                        if      (newpan <= -0.5f) { v->panFactorLeft = 1.0f; v->panFactorRight = 0.0f; }
1568
                        else if (newpan >=  0.5f) { v->panFactorLeft = 0.0f; v->panFactorRight = 1.0f; }
1569
                        else { v->panFactorLeft = TSF_SQRTF(0.5f - newpan); v->panFactorRight = TSF_SQRTF(0.5f + newpan); }
1570
                }
1571
        tsf_channel_init(f, channel)->panOffset = pan - 0.5f;
1572
}
1573
 
1574
TSFDEF void tsf_channel_set_volume(tsf* f, int channel, float volume)
1575
{
1576
        struct tsf_channel *c = tsf_channel_init(f, channel);
1577
        float gainDB = tsf_gainToDecibels(volume), gainDBChange = gainDB - c->gainDB;
1578
        struct tsf_voice *v, *vEnd;
1579
        if (gainDBChange == 0) return;
1580
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1581
                if (v->playingChannel == channel && v->playingPreset != -1)
1582
                        v->noteGainDB += gainDBChange;
1583
        c->gainDB = gainDB;
1584
}
1585
 
1586
TSFDEF void tsf_channel_set_pitchwheel(tsf* f, int channel, int pitch_wheel)
1587
{
1588
        struct tsf_channel *c = tsf_channel_init(f, channel);
1589
        if (c->pitchWheel == pitch_wheel) return;
1590
        c->pitchWheel = (unsigned short)pitch_wheel;
1591
        tsf_channel_applypitch(f, channel, c);
1592
}
1593
 
1594
TSFDEF void tsf_channel_set_pitchrange(tsf* f, int channel, float pitch_range)
1595
{
1596
        struct tsf_channel *c = tsf_channel_init(f, channel);
1597
        if (c->pitchRange == pitch_range) return;
1598
        c->pitchRange = pitch_range;
1599
        if (c->pitchWheel != 8192) tsf_channel_applypitch(f, channel, c);
1600
}
1601
 
1602
TSFDEF void tsf_channel_set_tuning(tsf* f, int channel, float tuning)
1603
{
1604
        struct tsf_channel *c = tsf_channel_init(f, channel);
1605
        if (c->tuning == tuning) return;
1606
        c->tuning = tuning;
1607
        tsf_channel_applypitch(f, channel, c);
1608
}
1609
 
1610
TSFDEF void tsf_channel_note_on(tsf* f, int channel, int key, float vel)
1611
{
1612
        if (!f->channels || channel >= f->channels->channelNum) return;
1613
        f->channels->activeChannel = channel;
1614
        tsf_note_on(f, f->channels->channels[channel].presetIndex, key, vel);
1615
}
1616
 
1617
TSFDEF void tsf_channel_note_off(tsf* f, int channel, int key)
1618
{
1619
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum, *vMatchFirst = TSF_NULL, *vMatchLast = TSF_NULL;
1620
        for (; v != vEnd; v++)
1621
        {
1622
                //Find the first and last entry in the voices list with matching channel, key and look up the smallest play index
1623
                if (v->playingPreset == -1 || v->playingChannel != channel || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE) continue;
1624
                else if (!vMatchFirst || v->playIndex < vMatchFirst->playIndex) vMatchFirst = vMatchLast = v;
1625
                else if (v->playIndex == vMatchFirst->playIndex) vMatchLast = v;
1626
        }
1627
        if (!vMatchFirst) return;
1628
        for (v = vMatchFirst; v <= vMatchLast; v++)
1629
        {
1630
                //Stop all voices with matching channel, key and the smallest play index which was enumerated above
1631
                if (v != vMatchFirst && v != vMatchLast &&
1632
                        (v->playIndex != vMatchFirst->playIndex || v->playingPreset == -1 || v->playingChannel != channel || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE)) continue;
1633
                tsf_voice_end(v, f->outSampleRate);
1634
        }
1635
}
1636
 
1637
TSFDEF void tsf_channel_note_off_all(tsf* f, int channel)
1638
{
1639
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1640
        for (; v != vEnd; v++)
1641
                if (v->playingPreset != -1 && v->playingChannel == channel && v->ampenv.segment < TSF_SEGMENT_RELEASE)
1642
                        tsf_voice_end(v, f->outSampleRate);
1643
}
1644
 
1645
TSFDEF void tsf_channel_sounds_off_all(tsf* f, int channel)
1646
{
1647
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1648
        for (; v != vEnd; v++)
1649
                if (v->playingPreset != -1 && v->playingChannel == channel && (v->ampenv.segment < TSF_SEGMENT_RELEASE || v->ampenv.parameters.release))
1650
                        tsf_voice_endquick(v, f->outSampleRate);
1651
}
1652
 
1653
TSFDEF void tsf_channel_midi_control(tsf* f, int channel, int controller, int control_value)
1654
{
1655
        struct tsf_channel* c = tsf_channel_init(f, channel);
1656
        switch (controller)
1657
        {
1658
                case   7 /*VOLUME_MSB*/      : c->midiVolume     = (unsigned short)((c->midiVolume     & 0x7F  ) | (control_value << 7)); goto TCMC_SET_VOLUME;
1659
                case  39 /*VOLUME_LSB*/      : c->midiVolume     = (unsigned short)((c->midiVolume     & 0x3F80) |  control_value);       goto TCMC_SET_VOLUME;
1660
                case  11 /*EXPRESSION_MSB*/  : c->midiExpression = (unsigned short)((c->midiExpression & 0x7F  ) | (control_value << 7)); goto TCMC_SET_VOLUME;
1661
                case  43 /*EXPRESSION_LSB*/  : c->midiExpression = (unsigned short)((c->midiExpression & 0x3F80) |  control_value);       goto TCMC_SET_VOLUME;
1662
                case  10 /*PAN_MSB*/         : c->midiPan        = (unsigned short)((c->midiPan        & 0x7F  ) | (control_value << 7)); goto TCMC_SET_PAN;
1663
                case  42 /*PAN_LSB*/         : c->midiPan        = (unsigned short)((c->midiPan        & 0x3F80) |  control_value);       goto TCMC_SET_PAN;
1664
                case   6 /*DATA_ENTRY_MSB*/  : c->midiData       = (unsigned short)((c->midiData       & 0x7F)   | (control_value << 7)); goto TCMC_SET_DATA;
1665
                case  38 /*DATA_ENTRY_LSB*/  : c->midiData       = (unsigned short)((c->midiData       & 0x3F80) |  control_value);       goto TCMC_SET_DATA;
1666
                case   0 /*BANK_SELECT_MSB*/ : c->bank = (unsigned short)(0x8000 | control_value); return; //bank select MSB alone acts like LSB
1667
                case  32 /*BANK_SELECT_LSB*/ : c->bank = (unsigned short)((c->bank & 0x8000 ? ((c->bank & 0x7F) << 7) : 0) | control_value); return;
1668
                case 101 /*RPN_MSB*/         : c->midiRPN = (unsigned short)(((c->midiRPN == 0xFFFF ? 0 : c->midiRPN) & 0x7F  ) | (control_value << 7)); return;
1669
                case 100 /*RPN_LSB*/         : c->midiRPN = (unsigned short)(((c->midiRPN == 0xFFFF ? 0 : c->midiRPN) & 0x3F80) |  control_value); return;
1670
                case  98 /*NRPN_LSB*/        : c->midiRPN = 0xFFFF; return;
1671
                case  99 /*NRPN_MSB*/        : c->midiRPN = 0xFFFF; return;
1672
                case 120 /*ALL_SOUND_OFF*/   : tsf_channel_sounds_off_all(f, channel); return;
1673
                case 123 /*ALL_NOTES_OFF*/   : tsf_channel_note_off_all(f, channel);   return;
1674
                case 121 /*ALL_CTRL_OFF*/    :
1675
                        c->midiVolume = c->midiExpression = 16383;
1676
                        c->midiPan = 8192;
1677
                        c->bank = 0;
1678
                        tsf_channel_set_volume(f, channel, 1.0f);
1679
                        tsf_channel_set_pan(f, channel, 0.5f);
1680
                        tsf_channel_set_pitchrange(f, channel, 2.0f);
1681
                        return;
1682
        }
1683
        return;
1684
TCMC_SET_VOLUME:
1685
        //Raising to the power of 3 seems to result in a decent sounding volume curve for MIDI
1686
        tsf_channel_set_volume(f, channel, TSF_POWF((c->midiVolume / 16383.0f) * (c->midiExpression / 16383.0f), 3.0f));
1687
        return;
1688
TCMC_SET_PAN:
1689
        tsf_channel_set_pan(f, channel, c->midiPan / 16383.0f);
1690
        return;
1691
TCMC_SET_DATA:
1692
        if      (c->midiRPN == 0) tsf_channel_set_pitchrange(f, channel, (c->midiData >> 7) + 0.01f * (c->midiData & 0x7F));
1693
        else if (c->midiRPN == 1) tsf_channel_set_tuning(f, channel, (int)c->tuning + ((float)c->midiData - 8192.0f) / 8192.0f); //fine tune
1694
        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
1695
        return;
1696
}
1697
 
1698
TSFDEF int tsf_channel_get_preset_index(tsf* f, int channel)
1699
{
1700
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].presetIndex : 0);
1701
}
1702
 
1703
TSFDEF int tsf_channel_get_preset_bank(tsf* f, int channel)
1704
{
1705
        return (f->channels && channel < f->channels->channelNum ? (f->channels->channels[channel].bank & 0x7FFF) : 0);
1706
}
1707
 
1708
TSFDEF int tsf_channel_get_preset_number(tsf* f, int channel)
1709
{
1710
        return (f->channels && channel < f->channels->channelNum ? f->presets[f->channels->channels[channel].presetIndex].preset : 0);
1711
}
1712
 
1713
TSFDEF float tsf_channel_get_pan(tsf* f, int channel)
1714
{
1715
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].panOffset - 0.5f : 0.5f);
1716
}
1717
 
1718
TSFDEF float tsf_channel_get_volume(tsf* f, int channel)
1719
{
1720
        return (f->channels && channel < f->channels->channelNum ? tsf_decibelsToGain(f->channels->channels[channel].gainDB) : 1.0f);
1721
}
1722
 
1723
TSFDEF int tsf_channel_get_pitchwheel(tsf* f, int channel)
1724
{
1725
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].pitchWheel : 8192);
1726
}
1727
 
1728
TSFDEF float tsf_channel_get_pitchrange(tsf* f, int channel)
1729
{
1730
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].pitchRange : 2.0f);
1731
}
1732
 
1733
TSFDEF float tsf_channel_get_tuning(tsf* f, int channel)
1734
{
1735
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].tuning : 0.0f);
1736
}
1737
 
1738
#ifdef __cplusplus
1739
}
1740
#endif
1741
 
1742
#endif //TSF_IMPLEMENTATION