Subversion Repositories eduke32

Rev

Rev 8752 | Rev 8770 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
8752 terminx 1
/* TinySoundFont - v0.8 - SoundFont2 synthesizer - https://github.com/schellingb/TinySoundFont
2
                                     no warranty implied; use at your own risk
3
   Do this:
4
      #define TSF_IMPLEMENTATION
5
   before you include this file in *one* C or C++ file to create the implementation.
6
   // i.e. it should look like this:
7
   #include ...
8
   #include ...
9
   #define TSF_IMPLEMENTATION
10
   #include "tsf.h"
11
 
12
   [OPTIONAL] #define TSF_NO_STDIO to remove stdio dependency
13
   [OPTIONAL] #define TSF_MALLOC, TSF_REALLOC, and TSF_FREE to avoid stdlib.h
14
   [OPTIONAL] #define TSF_MEMCPY, TSF_MEMSET to avoid string.h
15
   [OPTIONAL] #define TSF_POW, TSF_POWF, TSF_EXPF, TSF_LOG, TSF_TAN, TSF_LOG10, TSF_SQRT to avoid math.h
16
 
17
   NOT YET IMPLEMENTED
18
     - Support for ChorusEffectsSend and ReverbEffectsSend generators
19
     - Better low-pass filter without lowering performance too much
20
     - Support for modulators
21
 
22
   LICENSE (MIT)
23
 
24
   Copyright (C) 2017, 2018 Bernhard Schelling
25
   Based on SFZero, Copyright (C) 2012 Steve Folta (https://github.com/stevefolta/SFZero)
26
 
27
   Permission is hereby granted, free of charge, to any person obtaining a copy of this
28
   software and associated documentation files (the "Software"), to deal in the Software
29
   without restriction, including without limitation the rights to use, copy, modify, merge,
30
   publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
31
   to whom the Software is furnished to do so, subject to the following conditions:
32
 
33
   The above copyright notice and this permission notice shall be included in all
34
   copies or substantial portions of the Software.
35
 
36
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
37
   INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
38
   PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
39
   LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
40
   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
41
   USE OR OTHER DEALINGS IN THE SOFTWARE.
42
 
43
*/
44
 
45
#ifndef TSF_INCLUDE_TSF_INL
46
#define TSF_INCLUDE_TSF_INL
47
 
48
#ifdef __cplusplus
49
extern "C" {
50
#  define CPP_DEFAULT0 = 0
51
#else
52
#  define CPP_DEFAULT0
53
#endif
54
 
55
//define this if you want the API functions to be static
56
#ifdef TSF_STATIC
57
#define TSFDEF static
58
#else
59
#define TSFDEF extern
60
#endif
61
 
62
// The load functions will return a pointer to a struct tsf which all functions
63
// thereafter take as the first parameter.
64
// On error the tsf_load* functions will return NULL most likely due to invalid
65
// data (or if the file did not exist in tsf_load_filename).
66
typedef struct tsf tsf;
67
 
68
#ifndef TSF_NO_STDIO
69
// Directly load a SoundFont from a .sf2 file path
70
TSFDEF tsf* tsf_load_filename(const char* filename);
71
#endif
72
 
73
// Load a SoundFont from a block of memory
74
TSFDEF tsf* tsf_load_memory(const void* buffer, int size);
75
 
76
// Stream structure for the generic loading
77
struct tsf_stream
78
{
79
        // Custom data given to the functions as the first parameter
80
        void* data;
81
 
82
        // Function pointer will be called to read 'size' bytes into ptr (returns number of read bytes)
83
        int (*read)(void* data, void* ptr, unsigned int size);
84
 
85
        // Function pointer will be called to skip ahead over 'count' bytes (returns 1 on success, 0 on error)
86
        int (*skip)(void* data, unsigned int count);
87
};
88
 
89
// Generic SoundFont loading method using the stream structure above
90
TSFDEF tsf* tsf_load(struct tsf_stream* stream);
91
 
92
// Free the memory related to this tsf instance
93
TSFDEF void tsf_close(tsf* f);
94
 
95
// Stop all playing notes immediatly and reset all channel parameters
96
TSFDEF void tsf_reset(tsf* f);
97
 
98
// Returns the preset index from a bank and preset number, or -1 if it does not exist in the loaded SoundFont
99
TSFDEF int tsf_get_presetindex(const tsf* f, int bank, int preset_number);
100
 
101
// Returns the number of presets in the loaded SoundFont
102
TSFDEF int tsf_get_presetcount(const tsf* f);
103
 
104
// Returns the name of a preset index >= 0 and < tsf_get_presetcount()
105
TSFDEF const char* tsf_get_presetname(const tsf* f, int preset_index);
106
 
107
// Returns the name of a preset by bank and preset number
108
TSFDEF const char* tsf_bank_get_presetname(const tsf* f, int bank, int preset_number);
109
 
110
// Supported output modes by the render methods
111
enum TSFOutputMode
112
{
113
        // Two channels with single left/right samples one after another
114
        TSF_STEREO_INTERLEAVED,
115
        // Two channels with all samples for the left channel first then right
116
        TSF_STEREO_UNWEAVED,
117
        // A single channel (stereo instruments are mixed into center)
118
        TSF_MONO,
119
};
120
 
121
// Thread safety:
122
// Your audio output which calls the tsf_render* functions will most likely
123
// run on a different thread than where the playback tsf_note* functions
124
// are called. In which case some sort of concurrency control like a
125
// mutex needs to be used so they are not called at the same time.
126
 
127
// Setup the parameters for the voice render methods
128
//   outputmode: if mono or stereo and how stereo channel data is ordered
129
//   samplerate: the number of samples per second (output frequency)
130
//   global_gain_db: volume gain in decibels (>0 means higher, <0 means lower)
131
TSFDEF void tsf_set_output(tsf* f, enum TSFOutputMode outputmode, int samplerate, float global_gain_db CPP_DEFAULT0);
132
 
133
// Start playing a note
134
//   preset_index: preset index >= 0 and < tsf_get_presetcount()
135
//   key: note value between 0 and 127 (60 being middle C)
136
//   vel: velocity as a float between 0.0 (equal to note off) and 1.0 (full)
137
//   bank: instrument bank number (alternative to preset_index)
138
//   preset_number: preset number (alternative to preset_index)
139
//   (bank_note_on returns 0 if preset does not exist, otherwise 1)
140
TSFDEF void tsf_note_on(tsf* f, int preset_index, int key, float vel);
141
TSFDEF int  tsf_bank_note_on(tsf* f, int bank, int preset_number, int key, float vel);
142
 
143
// Stop playing a note
144
//   (bank_note_off returns 0 if preset does not exist, otherwise 1)
145
TSFDEF void tsf_note_off(tsf* f, int preset_index, int key);
146
TSFDEF int  tsf_bank_note_off(tsf* f, int bank, int preset_number, int key);
147
 
148
// Stop playing all notes (end with sustain and release)
149
TSFDEF void tsf_note_off_all(tsf* f);
150
 
151
// Returns the number of active voices
152
TSFDEF int tsf_active_voice_count(tsf* f);
153
 
154
// Render output samples into a buffer
155
// You can either render as signed 16-bit values (tsf_render_short) or
156
// as 32-bit float values (tsf_render_float)
157
//   buffer: target buffer of size samples * output_channels * sizeof(type)
158
//   samples: number of samples to render
159
//   flag_mixing: if 0 clear the buffer first, otherwise mix into existing data
160
TSFDEF void tsf_render_short(tsf* f, short* buffer, int samples, int flag_mixing CPP_DEFAULT0);
161
TSFDEF void tsf_render_float(tsf* f, float* buffer, int samples, int flag_mixing CPP_DEFAULT0);
162
 
163
// Higher level channel based functions, set up channel parameters
164
//   channel: channel number
165
//   preset_index: preset index >= 0 and < tsf_get_presetcount()
166
//   preset_number: preset number (alternative to preset_index)
167
//   flag_mididrums: 0 for normal channels, otherwise apply MIDI drum channel rules
168
//   bank: instrument bank number (alternative to preset_index)
169
//   pan: stereo panning value from 0.0 (left) to 1.0 (right) (default 0.5 center)
170
//   volume: linear volume scale factor (default 1.0 full)
171
//   pitch_wheel: pitch wheel position 0 to 16383 (default 8192 unpitched)
172
//   pitch_range: range of the pitch wheel in semitones (default 2.0, total +/- 2 semitones)
173
//   tuning: tuning of all playing voices in semitones (default 0.0, standard (A440) tuning)
174
//   (set_preset_number and set_bank_preset return 0 if preset does not exist, otherwise 1)
175
TSFDEF void tsf_channel_set_presetindex(tsf* f, int channel, int preset_index);
176
TSFDEF int  tsf_channel_set_presetnumber(tsf* f, int channel, int preset_number, int flag_mididrums CPP_DEFAULT0);
177
TSFDEF void tsf_channel_set_bank(tsf* f, int channel, int bank);
178
TSFDEF int  tsf_channel_set_bank_preset(tsf* f, int channel, int bank, int preset_number);
179
TSFDEF void tsf_channel_set_pan(tsf* f, int channel, float pan);
180
TSFDEF void tsf_channel_set_volume(tsf* f, int channel, float volume);
181
TSFDEF void tsf_channel_set_pitchwheel(tsf* f, int channel, int pitch_wheel);
182
TSFDEF void tsf_channel_set_pitchrange(tsf* f, int channel, float pitch_range);
183
TSFDEF void tsf_channel_set_tuning(tsf* f, int channel, float tuning);
184
 
185
// Start or stop playing notes on a channel (needs channel preset to be set)
186
//   channel: channel number
187
//   key: note value between 0 and 127 (60 being middle C)
188
//   vel: velocity as a float between 0.0 (equal to note off) and 1.0 (full)
189
TSFDEF void tsf_channel_note_on(tsf* f, int channel, int key, float vel);
190
TSFDEF void tsf_channel_note_off(tsf* f, int channel, int key);
191
TSFDEF void tsf_channel_note_off_all(tsf* f, int channel); //end with sustain and release
192
TSFDEF void tsf_channel_sounds_off_all(tsf* f, int channel); //end immediatly
193
 
194
// Apply a MIDI control change to the channel (not all controllers are supported!)
195
TSFDEF void tsf_channel_midi_control(tsf* f, int channel, int controller, int control_value);
196
 
197
// Get current values set on the channels
198
TSFDEF int tsf_channel_get_preset_index(tsf* f, int channel);
199
TSFDEF int tsf_channel_get_preset_bank(tsf* f, int channel);
200
TSFDEF int tsf_channel_get_preset_number(tsf* f, int channel);
201
TSFDEF float tsf_channel_get_pan(tsf* f, int channel);
202
TSFDEF float tsf_channel_get_volume(tsf* f, int channel);
203
TSFDEF int tsf_channel_get_pitchwheel(tsf* f, int channel);
204
TSFDEF float tsf_channel_get_pitchrange(tsf* f, int channel);
205
TSFDEF float tsf_channel_get_tuning(tsf* f, int channel);
206
 
207
#ifdef __cplusplus
208
#  undef CPP_DEFAULT0
209
}
210
#endif
211
 
212
// end header
213
// ---------------------------------------------------------------------------------------------------------
214
#endif //TSF_INCLUDE_TSF_INL
215
 
216
#ifdef TSF_IMPLEMENTATION
217
 
218
// The lower this block size is the more accurate the effects are.
219
// Increasing the value significantly lowers the CPU usage of the voice rendering.
220
// If LFO affects the low-pass filter it can be hearable even as low as 8.
221
#ifndef TSF_RENDER_EFFECTSAMPLEBLOCK
222
#define TSF_RENDER_EFFECTSAMPLEBLOCK 64
223
#endif
224
 
225
// Grace release time for quick voice off (avoid clicking noise)
226
#define TSF_FASTRELEASETIME 0.01f
227
 
228
#if !defined(TSF_MALLOC) || !defined(TSF_FREE) || !defined(TSF_REALLOC)
229
#  include <stdlib.h>
230
#  define TSF_MALLOC  malloc
231
#  define TSF_FREE    free
232
#  define TSF_REALLOC realloc
233
#endif
234
 
235
#if !defined(TSF_MEMCPY) || !defined(TSF_MEMSET)
236
#  include <string.h>
237
#  define TSF_MEMCPY  memcpy
238
#  define TSF_MEMSET  memset
239
#endif
240
 
241
#if !defined(TSF_POW) || !defined(TSF_POWF) || !defined(TSF_EXPF) || !defined(TSF_LOG) || !defined(TSF_TAN) || !defined(TSF_LOG10) || !defined(TSF_SQRT)
242
#  include <math.h>
243
#  if !defined(__cplusplus) && !defined(NAN) && !defined(powf) && !defined(expf) && !defined(sqrtf)
244
#    define powf (float)pow // deal with old math.h
245
#    define expf (float)exp // files that come without
246
#    define sqrtf (float)sqrt // powf, expf and sqrtf
247
#  endif
248
#  define TSF_POW     pow
249
#  define TSF_POWF    powf
250
#  define TSF_EXPF    expf
251
#  define TSF_LOG     log
252
#  define TSF_TAN     tan
253
#  define TSF_LOG10   log10
254
#  define TSF_SQRTF   sqrtf
255
#endif
256
 
257
#ifndef TSF_NO_STDIO
258
#  include <stdio.h>
259
#endif
260
 
261
#define TSF_TRUE 1
262
#define TSF_FALSE 0
263
#define TSF_BOOL char
264
#define TSF_PI 3.14159265358979323846264338327950288
265
#define TSF_NULL 0
266
 
267
#ifdef __cplusplus
268
extern "C" {
269
#endif
270
 
271
typedef char tsf_fourcc[4];
272
typedef signed char tsf_s8;
273
typedef unsigned char tsf_u8;
274
typedef unsigned short tsf_u16;
275
typedef signed short tsf_s16;
276
typedef unsigned int tsf_u32;
277
typedef char tsf_char20[20];
278
 
279
#define TSF_FourCCEquals(value1, value2) (value1[0] == value2[0] && value1[1] == value2[1] && value1[2] == value2[2] && value1[3] == value2[3])
280
 
281
struct tsf
282
{
283
        struct tsf_preset* presets;
284
        float* fontSamples;
285
        struct tsf_voice* voices;
286
        struct tsf_channels* channels;
287
        float* outputSamples;
288
 
289
        int presetNum;
290
        int voiceNum;
291
        int outputSampleSize;
292
        unsigned int voicePlayIndex;
293
 
294
        enum TSFOutputMode outputmode;
295
        float outSampleRate;
296
        float globalGainDB;
297
};
298
 
299
#ifndef TSF_NO_STDIO
300
static int tsf_stream_stdio_read(FILE* f, void* ptr, unsigned int size) { return (int)fread(ptr, 1, size, f); }
301
static int tsf_stream_stdio_skip(FILE* f, unsigned int count) { return !fseek(f, count, SEEK_CUR); }
302
TSFDEF tsf* tsf_load_filename(const char* filename)
303
{
304
        tsf* res;
305
        struct tsf_stream stream = { TSF_NULL, (int(*)(void*,void*,unsigned int))&tsf_stream_stdio_read, (int(*)(void*,unsigned int))&tsf_stream_stdio_skip };
306
        #if __STDC_WANT_SECURE_LIB__
307
        FILE* f = TSF_NULL; fopen_s(&f, filename, "rb");
308
        #else
309
        FILE* f = fopen(filename, "rb");
310
        #endif
311
        if (!f)
312
        {
313
                //if (e) *e = TSF_FILENOTFOUND;
314
                return TSF_NULL;
315
        }
316
        stream.data = f;
317
        res = tsf_load(&stream);
318
        fclose(f);
319
        return res;
320
}
321
#endif
322
 
323
struct tsf_stream_memory { const char* buffer; unsigned int total, pos; };
324
static int tsf_stream_memory_read(struct tsf_stream_memory* m, void* ptr, unsigned int size) { if (size > m->total - m->pos) size = m->total - m->pos; TSF_MEMCPY(ptr, m->buffer+m->pos, size); m->pos += size; return size; }
325
static int tsf_stream_memory_skip(struct tsf_stream_memory* m, unsigned int count) { if (m->pos + count > m->total) return 0; m->pos += count; return 1; }
326
TSFDEF tsf* tsf_load_memory(const void* buffer, int size)
327
{
328
        struct tsf_stream stream = { TSF_NULL, (int(*)(void*,void*,unsigned int))&tsf_stream_memory_read, (int(*)(void*,unsigned int))&tsf_stream_memory_skip };
329
        struct tsf_stream_memory f = { 0, 0, 0 };
330
        f.buffer = (const char*)buffer;
331
        f.total = size;
332
        stream.data = &f;
333
        return tsf_load(&stream);
334
}
335
 
336
enum { TSF_LOOPMODE_NONE, TSF_LOOPMODE_CONTINUOUS, TSF_LOOPMODE_SUSTAIN };
337
 
338
enum { TSF_SEGMENT_NONE, TSF_SEGMENT_DELAY, TSF_SEGMENT_ATTACK, TSF_SEGMENT_HOLD, TSF_SEGMENT_DECAY, TSF_SEGMENT_SUSTAIN, TSF_SEGMENT_RELEASE, TSF_SEGMENT_DONE };
339
 
340
struct tsf_hydra
341
{
342
        struct tsf_hydra_phdr *phdrs; struct tsf_hydra_pbag *pbags; struct tsf_hydra_pmod *pmods;
343
        struct tsf_hydra_pgen *pgens; struct tsf_hydra_inst *insts; struct tsf_hydra_ibag *ibags;
344
        struct tsf_hydra_imod *imods; struct tsf_hydra_igen *igens; struct tsf_hydra_shdr *shdrs;
345
        int phdrNum, pbagNum, pmodNum, pgenNum, instNum, ibagNum, imodNum, igenNum, shdrNum;
346
};
347
 
348
union tsf_hydra_genamount { struct { tsf_u8 lo, hi; } range; tsf_s16 shortAmount; tsf_u16 wordAmount; };
349
struct tsf_hydra_phdr { tsf_char20 presetName; tsf_u16 preset, bank, presetBagNdx; tsf_u32 library, genre, morphology; };
350
struct tsf_hydra_pbag { tsf_u16 genNdx, modNdx; };
351
struct tsf_hydra_pmod { tsf_u16 modSrcOper, modDestOper; tsf_s16 modAmount; tsf_u16 modAmtSrcOper, modTransOper; };
352
struct tsf_hydra_pgen { tsf_u16 genOper; union tsf_hydra_genamount genAmount; };
353
struct tsf_hydra_inst { tsf_char20 instName; tsf_u16 instBagNdx; };
354
struct tsf_hydra_ibag { tsf_u16 instGenNdx, instModNdx; };
355
struct tsf_hydra_imod { tsf_u16 modSrcOper, modDestOper; tsf_s16 modAmount; tsf_u16 modAmtSrcOper, modTransOper; };
356
struct tsf_hydra_igen { tsf_u16 genOper; union tsf_hydra_genamount genAmount; };
357
struct tsf_hydra_shdr { tsf_char20 sampleName; tsf_u32 start, end, startLoop, endLoop, sampleRate; tsf_u8 originalPitch; tsf_s8 pitchCorrection; tsf_u16 sampleLink, sampleType; };
358
 
359
#define TSFR(FIELD) stream->read(stream->data, &i->FIELD, sizeof(i->FIELD));
360
static void tsf_hydra_read_phdr(struct tsf_hydra_phdr* i, struct tsf_stream* stream) { TSFR(presetName) TSFR(preset) TSFR(bank) TSFR(presetBagNdx) TSFR(library) TSFR(genre) TSFR(morphology) }
361
static void tsf_hydra_read_pbag(struct tsf_hydra_pbag* i, struct tsf_stream* stream) { TSFR(genNdx) TSFR(modNdx) }
362
static void tsf_hydra_read_pmod(struct tsf_hydra_pmod* i, struct tsf_stream* stream) { TSFR(modSrcOper) TSFR(modDestOper) TSFR(modAmount) TSFR(modAmtSrcOper) TSFR(modTransOper) }
363
static void tsf_hydra_read_pgen(struct tsf_hydra_pgen* i, struct tsf_stream* stream) { TSFR(genOper) TSFR(genAmount) }
364
static void tsf_hydra_read_inst(struct tsf_hydra_inst* i, struct tsf_stream* stream) { TSFR(instName) TSFR(instBagNdx) }
365
static void tsf_hydra_read_ibag(struct tsf_hydra_ibag* i, struct tsf_stream* stream) { TSFR(instGenNdx) TSFR(instModNdx) }
366
static void tsf_hydra_read_imod(struct tsf_hydra_imod* i, struct tsf_stream* stream) { TSFR(modSrcOper) TSFR(modDestOper) TSFR(modAmount) TSFR(modAmtSrcOper) TSFR(modTransOper) }
367
static void tsf_hydra_read_igen(struct tsf_hydra_igen* i, struct tsf_stream* stream) { TSFR(genOper) TSFR(genAmount) }
368
static void tsf_hydra_read_shdr(struct tsf_hydra_shdr* i, struct tsf_stream* stream) { TSFR(sampleName) TSFR(start) TSFR(end) TSFR(startLoop) TSFR(endLoop) TSFR(sampleRate) TSFR(originalPitch) TSFR(pitchCorrection) TSFR(sampleLink) TSFR(sampleType) }
369
#undef TSFR
370
 
371
struct tsf_riffchunk { tsf_fourcc id; tsf_u32 size; };
372
struct tsf_envelope { float delay, attack, hold, decay, sustain, release, keynumToHold, keynumToDecay; };
373
struct tsf_voice_envelope { float level, slope; int samplesUntilNextSegment; short segment, midiVelocity; struct tsf_envelope parameters; TSF_BOOL segmentIsExponential, isAmpEnv; };
374
struct tsf_voice_lowpass { double QInv, a0, a1, b1, b2, z1, z2; TSF_BOOL active; };
375
struct tsf_voice_lfo { int samplesUntil; float level, delta; };
376
 
377
struct tsf_region
378
{
379
        int loop_mode;
380
        unsigned int sample_rate;
381
        unsigned char lokey, hikey, lovel, hivel;
382
        unsigned int group, offset, end, loop_start, loop_end;
383
        int transpose, tune, pitch_keycenter, pitch_keytrack;
384
        float attenuation, pan;
385
        struct tsf_envelope ampenv, modenv;
386
        int initialFilterQ, initialFilterFc;
387
        int modEnvToPitch, modEnvToFilterFc, modLfoToFilterFc, modLfoToVolume;
388
        float delayModLFO;
389
        int freqModLFO, modLfoToPitch;
390
        float delayVibLFO;
391
        int freqVibLFO, vibLfoToPitch;
392
};
393
 
394
struct tsf_preset
395
{
396
        tsf_char20 presetName;
397
        tsf_u16 preset, bank;
398
        struct tsf_region* regions;
399
        int regionNum;
400
};
401
 
402
struct tsf_voice
403
{
404
        int playingPreset, playingKey, playingChannel;
405
        struct tsf_region* region;
406
        double pitchInputTimecents, pitchOutputFactor;
407
        double sourceSamplePosition;
408
        float  noteGainDB, panFactorLeft, panFactorRight;
409
        unsigned int playIndex, loopStart, loopEnd;
410
        struct tsf_voice_envelope ampenv, modenv;
411
        struct tsf_voice_lowpass lowpass;
412
        struct tsf_voice_lfo modlfo, viblfo;
413
};
414
 
415
struct tsf_channel
416
{
417
        unsigned short presetIndex, bank, pitchWheel, midiPan, midiVolume, midiExpression, midiRPN, midiData;
418
        float panOffset, gainDB, pitchRange, tuning;
419
};
420
 
421
struct tsf_channels
422
{
423
        void (*setupVoice)(tsf* f, struct tsf_voice* voice);
424
        struct tsf_channel* channels;
425
        int channelNum, activeChannel;
426
};
427
 
428
static double tsf_timecents2Secsd(double timecents) { return TSF_POW(2.0, timecents / 1200.0); }
429
static float tsf_timecents2Secsf(float timecents) { return TSF_POWF(2.0f, timecents / 1200.0f); }
430
static float tsf_cents2Hertz(float cents) { return 8.176f * TSF_POWF(2.0f, cents / 1200.0f); }
431
static float tsf_decibelsToGain(float db) { return (db > -100.f ? TSF_POWF(10.0f, db * 0.05f) : 0); }
432
static float tsf_gainToDecibels(float gain) { return (gain <= .00001f ? -100.f : (float)(20.0 * TSF_LOG10(gain))); }
433
 
434
static TSF_BOOL tsf_riffchunk_read(struct tsf_riffchunk* parent, struct tsf_riffchunk* chunk, struct tsf_stream* stream)
435
{
436
        TSF_BOOL IsRiff, IsList;
437
        if (parent && sizeof(tsf_fourcc) + sizeof(tsf_u32) > parent->size) return TSF_FALSE;
438
        if (!stream->read(stream->data, &chunk->id, sizeof(tsf_fourcc)) || *chunk->id <= ' ' || *chunk->id >= 'z') return TSF_FALSE;
439
        if (!stream->read(stream->data, &chunk->size, sizeof(tsf_u32))) return TSF_FALSE;
440
        if (parent && sizeof(tsf_fourcc) + sizeof(tsf_u32) + chunk->size > parent->size) return TSF_FALSE;
441
        if (parent) parent->size -= sizeof(tsf_fourcc) + sizeof(tsf_u32) + chunk->size;
442
        IsRiff = TSF_FourCCEquals(chunk->id, "RIFF"), IsList = TSF_FourCCEquals(chunk->id, "LIST");
443
        if (IsRiff && parent) return TSF_FALSE; //not allowed
444
        if (!IsRiff && !IsList) return TSF_TRUE; //custom type without sub type
445
        if (!stream->read(stream->data, &chunk->id, sizeof(tsf_fourcc)) || *chunk->id <= ' ' || *chunk->id >= 'z') return TSF_FALSE;
446
        chunk->size -= sizeof(tsf_fourcc);
447
        return TSF_TRUE;
448
}
449
 
450
static void tsf_region_clear(struct tsf_region* i, TSF_BOOL for_relative)
451
{
452
        TSF_MEMSET(i, 0, sizeof(struct tsf_region));
453
        i->hikey = i->hivel = 127;
454
        i->pitch_keycenter = 60; // C4
455
        if (for_relative) return;
456
 
457
        i->pitch_keytrack = 100;
458
 
459
        i->pitch_keycenter = -1;
460
 
461
        // SF2 defaults in timecents.
462
        i->ampenv.delay = i->ampenv.attack = i->ampenv.hold = i->ampenv.decay = i->ampenv.release = -12000.0f;
463
        i->modenv.delay = i->modenv.attack = i->modenv.hold = i->modenv.decay = i->modenv.release = -12000.0f;
464
 
465
        i->initialFilterFc = 13500;
466
 
467
        i->delayModLFO = -12000.0f;
468
        i->delayVibLFO = -12000.0f;
469
}
470
 
471
static void tsf_region_operator(struct tsf_region* region, tsf_u16 genOper, union tsf_hydra_genamount* amount)
472
{
473
        enum
474
        {
475
                StartAddrsOffset, EndAddrsOffset, StartloopAddrsOffset, EndloopAddrsOffset, StartAddrsCoarseOffset, ModLfoToPitch, VibLfoToPitch, ModEnvToPitch,
476
                InitialFilterFc, InitialFilterQ, ModLfoToFilterFc, ModEnvToFilterFc, EndAddrsCoarseOffset, ModLfoToVolume, Unused1, ChorusEffectsSend,
477
                ReverbEffectsSend, Pan, Unused2, Unused3, Unused4, DelayModLFO, FreqModLFO, DelayVibLFO, FreqVibLFO, DelayModEnv, AttackModEnv, HoldModEnv,
478
                DecayModEnv, SustainModEnv, ReleaseModEnv, KeynumToModEnvHold, KeynumToModEnvDecay, DelayVolEnv, AttackVolEnv, HoldVolEnv, DecayVolEnv,
479
                SustainVolEnv, ReleaseVolEnv, KeynumToVolEnvHold, KeynumToVolEnvDecay, Instrument, Reserved1, KeyRange, VelRange, StartloopAddrsCoarseOffset,
480
                Keynum, Velocity, InitialAttenuation, Reserved2, EndloopAddrsCoarseOffset, CoarseTune, FineTune, SampleID, SampleModes, Reserved3, ScaleTuning,
481
                ExclusiveClass, OverridingRootKey, Unused5, EndOper
482
        };
483
        switch (genOper)
484
        {
485
                case StartAddrsOffset:           region->offset += amount->shortAmount; break;
486
                case EndAddrsOffset:             region->end += amount->shortAmount; break;
487
                case StartloopAddrsOffset:       region->loop_start += amount->shortAmount; break;
488
                case EndloopAddrsOffset:         region->loop_end += amount->shortAmount; break;
489
                case StartAddrsCoarseOffset:     region->offset += amount->shortAmount * 32768; break;
490
                case ModLfoToPitch:              region->modLfoToPitch = amount->shortAmount; break;
491
                case VibLfoToPitch:              region->vibLfoToPitch = amount->shortAmount; break;
492
                case ModEnvToPitch:              region->modEnvToPitch = amount->shortAmount; break;
493
                case InitialFilterFc:            region->initialFilterFc = amount->shortAmount; break;
494
                case InitialFilterQ:             region->initialFilterQ = amount->shortAmount; break;
495
                case ModLfoToFilterFc:           region->modLfoToFilterFc = amount->shortAmount; break;
496
                case ModEnvToFilterFc:           region->modEnvToFilterFc = amount->shortAmount; break;
497
                case EndAddrsCoarseOffset:       region->end += amount->shortAmount * 32768; break;
498
                case ModLfoToVolume:             region->modLfoToVolume = amount->shortAmount; break;
499
                case Pan:                        region->pan = amount->shortAmount / 1000.0f; break;
500
                case DelayModLFO:                region->delayModLFO = amount->shortAmount; break;
501
                case FreqModLFO:                 region->freqModLFO = amount->shortAmount; break;
502
                case DelayVibLFO:                region->delayVibLFO = amount->shortAmount; break;
503
                case FreqVibLFO:                 region->freqVibLFO = amount->shortAmount; break;
504
                case DelayModEnv:                region->modenv.delay = amount->shortAmount; break;
505
                case AttackModEnv:               region->modenv.attack = amount->shortAmount; break;
506
                case HoldModEnv:                 region->modenv.hold = amount->shortAmount; break;
507
                case DecayModEnv:                region->modenv.decay = amount->shortAmount; break;
508
                case SustainModEnv:              region->modenv.sustain = amount->shortAmount; break;
509
                case ReleaseModEnv:              region->modenv.release = amount->shortAmount; break;
510
                case KeynumToModEnvHold:         region->modenv.keynumToHold = amount->shortAmount; break;
511
                case KeynumToModEnvDecay:        region->modenv.keynumToDecay = amount->shortAmount; break;
512
                case DelayVolEnv:                region->ampenv.delay = amount->shortAmount; break;
513
                case AttackVolEnv:               region->ampenv.attack = amount->shortAmount; break;
514
                case HoldVolEnv:                 region->ampenv.hold = amount->shortAmount; break;
515
                case DecayVolEnv:                region->ampenv.decay = amount->shortAmount; break;
516
                case SustainVolEnv:              region->ampenv.sustain = amount->shortAmount; break;
517
                case ReleaseVolEnv:              region->ampenv.release = amount->shortAmount; break;
518
                case KeynumToVolEnvHold:         region->ampenv.keynumToHold = amount->shortAmount; break;
519
                case KeynumToVolEnvDecay:        region->ampenv.keynumToDecay = amount->shortAmount; break;
520
                case KeyRange:                   region->lokey = amount->range.lo; region->hikey = amount->range.hi; break;
521
                case VelRange:                   region->lovel = amount->range.lo; region->hivel = amount->range.hi; break;
522
                case StartloopAddrsCoarseOffset: region->loop_start += amount->shortAmount * 32768; break;
523
                case InitialAttenuation:         region->attenuation += amount->shortAmount * 0.1f; break;
524
                case EndloopAddrsCoarseOffset:   region->loop_end += amount->shortAmount * 32768; break;
525
                case CoarseTune:                 region->transpose += amount->shortAmount; break;
526
                case FineTune:                   region->tune += amount->shortAmount; break;
527
                case SampleModes:                region->loop_mode = ((amount->wordAmount&3) == 3 ? TSF_LOOPMODE_SUSTAIN : ((amount->wordAmount&3) == 1 ? TSF_LOOPMODE_CONTINUOUS : TSF_LOOPMODE_NONE)); break;
528
                case ScaleTuning:                region->pitch_keytrack = amount->shortAmount; break;
529
                case ExclusiveClass:             region->group = amount->wordAmount; break;
530
                case OverridingRootKey:          region->pitch_keycenter = amount->shortAmount; break;
531
                //case gen_endOper: break; // Ignore.
532
                //default: addUnsupportedOpcode(generator_name);
533
        }
534
}
535
 
536
static void tsf_region_envtosecs(struct tsf_envelope* p, TSF_BOOL sustainIsGain)
537
{
538
        // EG times need to be converted from timecents to seconds.
539
        // Pin very short EG segments.  Timecents don't get to zero, and our EG is
540
        // happier with zero values.
541
        p->delay   = (p->delay   < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->delay));
542
        p->attack  = (p->attack  < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->attack));
543
        p->release = (p->release < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->release));
544
 
545
        // If we have dynamic hold or decay times depending on key number we need
546
        // to keep the values in timecents so we can calculate it during startNote
547
        if (!p->keynumToHold)  p->hold  = (p->hold  < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->hold));
548
        if (!p->keynumToDecay) p->decay = (p->decay < -11950.0f ? 0.0f : tsf_timecents2Secsf(p->decay));
549
 
550
        if (p->sustain < 0.0f) p->sustain = 0.0f;
551
        else if (sustainIsGain) p->sustain = tsf_decibelsToGain(-p->sustain / 10.0f);
552
        else p->sustain = 1.0f - (p->sustain / 1000.0f);
8754 terminx 553
 
554
        p->sustain = clamp(p->sustain, 0, 1.f);
8752 terminx 555
}
556
 
557
static void tsf_load_presets(tsf* res, struct tsf_hydra *hydra, unsigned int fontSampleCount)
558
{
559
        enum { GenInstrument = 41, GenKeyRange = 43, GenVelRange = 44, GenSampleID = 53 };
560
        // Read each preset.
561
        struct tsf_hydra_phdr *pphdr, *pphdrMax;
562
        for (pphdr = hydra->phdrs, pphdrMax = pphdr + hydra->phdrNum - 1; pphdr != pphdrMax; pphdr++)
563
        {
564
                int sortedIndex = 0, region_index = 0;
565
                struct tsf_hydra_phdr *otherphdr;
566
                struct tsf_preset* preset;
567
                struct tsf_hydra_pbag *ppbag, *ppbagEnd;
568
                struct tsf_region globalRegion;
569
                for (otherphdr = hydra->phdrs; otherphdr != pphdrMax; otherphdr++)
570
                {
571
                        if (otherphdr == pphdr || otherphdr->bank > pphdr->bank) continue;
572
                        else if (otherphdr->bank < pphdr->bank) sortedIndex++;
573
                        else if (otherphdr->preset > pphdr->preset) continue;
574
                        else if (otherphdr->preset < pphdr->preset) sortedIndex++;
575
                        else if (otherphdr < pphdr) sortedIndex++;
576
                }
577
 
578
                preset = &res->presets[sortedIndex];
579
                TSF_MEMCPY(preset->presetName, pphdr->presetName, sizeof(preset->presetName));
580
                preset->presetName[sizeof(preset->presetName)-1] = '\0'; //should be zero terminated in source file but make sure
581
                preset->bank = pphdr->bank;
582
                preset->preset = pphdr->preset;
583
                preset->regionNum = 0;
584
 
585
                //count regions covered by this preset
586
                for (ppbag = hydra->pbags + pphdr->presetBagNdx, ppbagEnd = hydra->pbags + pphdr[1].presetBagNdx; ppbag != ppbagEnd; ppbag++)
587
                {
588
                        unsigned char plokey = 0, phikey = 127, plovel = 0, phivel = 127;
589
                        struct tsf_hydra_pgen *ppgen, *ppgenEnd; struct tsf_hydra_inst *pinst; struct tsf_hydra_ibag *pibag, *pibagEnd; struct tsf_hydra_igen *pigen, *pigenEnd;
590
                        for (ppgen = hydra->pgens + ppbag->genNdx, ppgenEnd = hydra->pgens + ppbag[1].genNdx; ppgen != ppgenEnd; ppgen++)
591
                        {
592
                                if (ppgen->genOper == GenKeyRange) { plokey = ppgen->genAmount.range.lo; phikey = ppgen->genAmount.range.hi; continue; }
593
                                if (ppgen->genOper == GenVelRange) { plovel = ppgen->genAmount.range.lo; phivel = ppgen->genAmount.range.hi; continue; }
594
                                if (ppgen->genOper != GenInstrument) continue;
595
                                if (ppgen->genAmount.wordAmount >= hydra->instNum) continue;
596
                                pinst = hydra->insts + ppgen->genAmount.wordAmount;
597
                                for (pibag = hydra->ibags + pinst->instBagNdx, pibagEnd = hydra->ibags + pinst[1].instBagNdx; pibag != pibagEnd; pibag++)
598
                                {
599
                                        unsigned char ilokey = 0, ihikey = 127, ilovel = 0, ihivel = 127;
600
                                        for (pigen = hydra->igens + pibag->instGenNdx, pigenEnd = hydra->igens + pibag[1].instGenNdx; pigen != pigenEnd; pigen++)
601
                                        {
602
                                                if (pigen->genOper == GenKeyRange) { ilokey = pigen->genAmount.range.lo; ihikey = pigen->genAmount.range.hi; continue; }
603
                                                if (pigen->genOper == GenVelRange) { ilovel = pigen->genAmount.range.lo; ihivel = pigen->genAmount.range.hi; continue; }
604
                                                if (pigen->genOper == GenSampleID && ihikey >= plokey && ilokey <= phikey && ihivel >= plovel && ilovel <= phivel) preset->regionNum++;
605
                                        }
606
                                }
607
                        }
608
                }
609
 
610
                preset->regions = (struct tsf_region*)TSF_MALLOC(preset->regionNum * sizeof(struct tsf_region));
611
                tsf_region_clear(&globalRegion, TSF_TRUE);
612
 
613
                // Zones.
614
                for (ppbag = hydra->pbags + pphdr->presetBagNdx, ppbagEnd = hydra->pbags + pphdr[1].presetBagNdx; ppbag != ppbagEnd; ppbag++)
615
                {
616
                        struct tsf_hydra_pgen *ppgen, *ppgenEnd; struct tsf_hydra_inst *pinst; struct tsf_hydra_ibag *pibag, *pibagEnd; struct tsf_hydra_igen *pigen, *pigenEnd;
617
                        struct tsf_region presetRegion = globalRegion;
618
                        int hadGenInstrument = 0;
619
 
620
                        // Generators.
621
                        for (ppgen = hydra->pgens + ppbag->genNdx, ppgenEnd = hydra->pgens + ppbag[1].genNdx; ppgen != ppgenEnd; ppgen++)
622
                        {
623
                                // Instrument.
624
                                if (ppgen->genOper == GenInstrument)
625
                                {
626
                                        struct tsf_region instRegion;
627
                                        tsf_u16 whichInst = ppgen->genAmount.wordAmount;
628
                                        if (whichInst >= hydra->instNum) continue;
629
 
630
                                        tsf_region_clear(&instRegion, TSF_FALSE);
631
                                        pinst = &hydra->insts[whichInst];
632
                                        for (pibag = hydra->ibags + pinst->instBagNdx, pibagEnd = hydra->ibags + pinst[1].instBagNdx; pibag != pibagEnd; pibag++)
633
                                        {
634
                                                // Generators.
635
                                                struct tsf_region zoneRegion = instRegion;
636
                                                int hadSampleID = 0;
637
                                                for (pigen = hydra->igens + pibag->instGenNdx, pigenEnd = hydra->igens + pibag[1].instGenNdx; pigen != pigenEnd; pigen++)
638
                                                {
639
                                                        if (pigen->genOper == GenSampleID)
640
                                                        {
641
                                                                struct tsf_hydra_shdr* pshdr;
642
 
643
                                                                //preset region key and vel ranges are a filter for the zone regions
644
                                                                if (zoneRegion.hikey < presetRegion.lokey || zoneRegion.lokey > presetRegion.hikey) continue;
645
                                                                if (zoneRegion.hivel < presetRegion.lovel || zoneRegion.lovel > presetRegion.hivel) continue;
646
                                                                if (presetRegion.lokey > zoneRegion.lokey) zoneRegion.lokey = presetRegion.lokey;
647
                                                                if (presetRegion.hikey < zoneRegion.hikey) zoneRegion.hikey = presetRegion.hikey;
648
                                                                if (presetRegion.lovel > zoneRegion.lovel) zoneRegion.lovel = presetRegion.lovel;
649
                                                                if (presetRegion.hivel < zoneRegion.hivel) zoneRegion.hivel = presetRegion.hivel;
650
 
651
                                                                //sum regions
652
                                                                zoneRegion.offset += presetRegion.offset;
653
                                                                zoneRegion.end += presetRegion.end;
654
                                                                zoneRegion.loop_start += presetRegion.loop_start;
655
                                                                zoneRegion.loop_end += presetRegion.loop_end;
656
                                                                zoneRegion.transpose += presetRegion.transpose;
657
                                                                zoneRegion.tune += presetRegion.tune;
658
                                                                zoneRegion.pitch_keytrack += presetRegion.pitch_keytrack;
659
                                                                zoneRegion.attenuation += presetRegion.attenuation;
660
                                                                zoneRegion.pan += presetRegion.pan;
661
                                                                zoneRegion.ampenv.delay += presetRegion.ampenv.delay;
662
                                                                zoneRegion.ampenv.attack += presetRegion.ampenv.attack;
663
                                                                zoneRegion.ampenv.hold += presetRegion.ampenv.hold;
664
                                                                zoneRegion.ampenv.decay += presetRegion.ampenv.decay;
665
                                                                zoneRegion.ampenv.sustain += presetRegion.ampenv.sustain;
666
                                                                zoneRegion.ampenv.release += presetRegion.ampenv.release;
667
                                                                zoneRegion.modenv.delay += presetRegion.modenv.delay;
668
                                                                zoneRegion.modenv.attack += presetRegion.modenv.attack;
669
                                                                zoneRegion.modenv.hold += presetRegion.modenv.hold;
670
                                                                zoneRegion.modenv.decay += presetRegion.modenv.decay;
671
                                                                zoneRegion.modenv.sustain += presetRegion.modenv.sustain;
672
                                                                zoneRegion.modenv.release += presetRegion.modenv.release;
673
                                                                zoneRegion.initialFilterQ += presetRegion.initialFilterQ;
674
                                                                zoneRegion.initialFilterFc += presetRegion.initialFilterFc;
675
                                                                zoneRegion.modEnvToPitch += presetRegion.modEnvToPitch;
676
                                                                zoneRegion.modEnvToFilterFc += presetRegion.modEnvToFilterFc;
677
                                                                zoneRegion.delayModLFO += presetRegion.delayModLFO;
678
                                                                zoneRegion.freqModLFO += presetRegion.freqModLFO;
679
                                                                zoneRegion.modLfoToPitch += presetRegion.modLfoToPitch;
680
                                                                zoneRegion.modLfoToFilterFc += presetRegion.modLfoToFilterFc;
681
                                                                zoneRegion.modLfoToVolume += presetRegion.modLfoToVolume;
682
                                                                zoneRegion.delayVibLFO += presetRegion.delayVibLFO;
683
                                                                zoneRegion.freqVibLFO += presetRegion.freqVibLFO;
684
                                                                zoneRegion.vibLfoToPitch += presetRegion.vibLfoToPitch;
685
 
686
                                                                // EG times need to be converted from timecents to seconds.
687
                                                                tsf_region_envtosecs(&zoneRegion.ampenv, TSF_TRUE);
688
                                                                tsf_region_envtosecs(&zoneRegion.modenv, TSF_FALSE);
689
 
690
                                                                // LFO times need to be converted from timecents to seconds.
691
                                                                zoneRegion.delayModLFO = (zoneRegion.delayModLFO < -11950.0f ? 0.0f : tsf_timecents2Secsf(zoneRegion.delayModLFO));
692
                                                                zoneRegion.delayVibLFO = (zoneRegion.delayVibLFO < -11950.0f ? 0.0f : tsf_timecents2Secsf(zoneRegion.delayVibLFO));
693
 
694
                                                                // Pin values to their ranges.
695
                                                                if (zoneRegion.pan < -0.5f) zoneRegion.pan = -0.5f;
696
                                                                else if (zoneRegion.pan > 0.5f) zoneRegion.pan = 0.5f;
697
                                                                if (zoneRegion.initialFilterQ < 1500 || zoneRegion.initialFilterQ > 13500) zoneRegion.initialFilterQ = 0;
698
 
699
                                                                pshdr = &hydra->shdrs[pigen->genAmount.wordAmount];
700
                                                                zoneRegion.offset += pshdr->start;
701
                                                                zoneRegion.end += pshdr->end;
702
                                                                zoneRegion.loop_start += pshdr->startLoop;
703
                                                                zoneRegion.loop_end += pshdr->endLoop;
704
                                                                if (pshdr->endLoop > 0) zoneRegion.loop_end -= 1;
705
                                                                if (zoneRegion.pitch_keycenter == -1) zoneRegion.pitch_keycenter = pshdr->originalPitch;
706
                                                                zoneRegion.tune += pshdr->pitchCorrection;
707
                                                                zoneRegion.sample_rate = pshdr->sampleRate;
708
                                                                if (zoneRegion.end && zoneRegion.end < fontSampleCount) zoneRegion.end++;
709
                                                                else zoneRegion.end = fontSampleCount;
710
 
711
                                                                preset->regions[region_index] = zoneRegion;
712
                                                                region_index++;
713
                                                                hadSampleID = 1;
714
                                                        }
715
                                                        else tsf_region_operator(&zoneRegion, pigen->genOper, &pigen->genAmount);
716
                                                }
717
 
718
                                                // Handle instrument's global zone.
719
                                                if (pibag == hydra->ibags + pinst->instBagNdx && !hadSampleID)
720
                                                        instRegion = zoneRegion;
721
 
722
                                                // Modulators (TODO)
723
                                                //if (ibag->instModNdx < ibag[1].instModNdx) addUnsupportedOpcode("any modulator");
724
                                        }
725
                                        hadGenInstrument = 1;
726
                                }
727
                                else tsf_region_operator(&presetRegion, ppgen->genOper, &ppgen->genAmount);
728
                        }
729
 
730
                        // Modulators (TODO)
731
                        //if (pbag->modNdx < pbag[1].modNdx) addUnsupportedOpcode("any modulator");
732
 
733
                        // Handle preset's global zone.
734
                        if (ppbag == hydra->pbags + pphdr->presetBagNdx && !hadGenInstrument)
735
                                globalRegion = presetRegion;
736
                }
737
        }
738
}
739
 
740
static void tsf_load_samples(float** fontSamples, unsigned int* fontSampleCount, struct tsf_riffchunk *chunkSmpl, struct tsf_stream* stream)
741
{
742
        // Read sample data into float format buffer.
743
        float* out; unsigned int samplesLeft, samplesToRead, samplesToConvert;
744
        samplesLeft = *fontSampleCount = chunkSmpl->size / sizeof(short);
745
        out = *fontSamples = (float*)TSF_MALLOC(samplesLeft * sizeof(float));
746
        for (; samplesLeft; samplesLeft -= samplesToRead)
747
        {
748
                short sampleBuffer[1024], *in = sampleBuffer;;
749
                samplesToRead = (samplesLeft > 1024 ? 1024 : samplesLeft);
750
                stream->read(stream->data, sampleBuffer, samplesToRead * sizeof(short));
751
 
752
                // Convert from signed 16-bit to float.
753
                for (samplesToConvert = samplesToRead; samplesToConvert > 0; --samplesToConvert)
754
                        // If we ever need to compile for big-endian platforms, we'll need to byte-swap here.
755
                        *out++ = (float)(*in++ / 32767.0);
756
        }
757
}
758
 
759
static void tsf_voice_envelope_nextsegment(struct tsf_voice_envelope* e, short active_segment, float outSampleRate)
760
{
761
        switch (active_segment)
762
        {
763
                case TSF_SEGMENT_NONE:
764
                        e->samplesUntilNextSegment = (int)(e->parameters.delay * outSampleRate);
765
                        if (e->samplesUntilNextSegment > 0)
766
                        {
767
                                e->segment = TSF_SEGMENT_DELAY;
768
                                e->segmentIsExponential = TSF_FALSE;
769
                                e->level = 0.0;
770
                                e->slope = 0.0;
771
                                return;
772
                        }
773
                        /* fall through */
774
                case TSF_SEGMENT_DELAY:
775
                        e->samplesUntilNextSegment = (int)(e->parameters.attack * outSampleRate);
776
                        if (e->samplesUntilNextSegment > 0)
777
                        {
778
                                if (!e->isAmpEnv)
779
                                {
780
                                        //mod env attack duration scales with velocity (velocity of 1 is full duration, max velocity is 0.125 times duration)
781
                                        e->samplesUntilNextSegment = (int)(e->parameters.attack * ((145 - e->midiVelocity) / 144.0f) * outSampleRate);
782
                                }
783
                                e->segment = TSF_SEGMENT_ATTACK;
784
                                e->segmentIsExponential = TSF_FALSE;
785
                                e->level = 0.0f;
786
                                e->slope = 1.0f / e->samplesUntilNextSegment;
787
                                return;
788
                        }
789
                        /* fall through */
790
                case TSF_SEGMENT_ATTACK:
791
                        e->samplesUntilNextSegment = (int)(e->parameters.hold * outSampleRate);
792
                        if (e->samplesUntilNextSegment > 0)
793
                        {
794
                                e->segment = TSF_SEGMENT_HOLD;
795
                                e->segmentIsExponential = TSF_FALSE;
796
                                e->level = 1.0f;
797
                                e->slope = 0.0f;
798
                                return;
799
                        }
800
                        /* fall through */
801
                case TSF_SEGMENT_HOLD:
802
                        e->samplesUntilNextSegment = (int)(e->parameters.decay * outSampleRate);
803
                        if (e->samplesUntilNextSegment > 0)
804
                        {
805
                                e->segment = TSF_SEGMENT_DECAY;
806
                                e->level = 1.0f;
807
                                if (e->isAmpEnv)
808
                                {
809
                                        // I don't truly understand this; just following what LinuxSampler does.
810
                                        float mysterySlope = -9.226f / e->samplesUntilNextSegment;
811
                                        e->slope = TSF_EXPF(mysterySlope);
812
                                        e->segmentIsExponential = TSF_TRUE;
813
                                        if (e->parameters.sustain > 0.0f)
814
                                        {
815
                                                // Again, this is following LinuxSampler's example, which is similar to
816
                                                // SF2-style decay, where "decay" specifies the time it would take to
817
                                                // get to zero, not to the sustain level.  The SFZ spec is not that
818
                                                // specific about what "decay" means, so perhaps it's really supposed
819
                                                // to specify the time to reach the sustain level.
820
                                                e->samplesUntilNextSegment = (int)(TSF_LOG(e->parameters.sustain) / mysterySlope);
821
                                        }
822
                                }
823
                                else
824
                                {
825
                                        e->slope = -1.0f / e->samplesUntilNextSegment;
826
                                        e->samplesUntilNextSegment = (int)(e->parameters.decay * (1.0f - e->parameters.sustain) * outSampleRate);
827
                                        e->segmentIsExponential = TSF_FALSE;
828
                                }
829
                                return;
830
                        }
831
                        /* fall through */
832
                case TSF_SEGMENT_DECAY:
833
                        e->segment = TSF_SEGMENT_SUSTAIN;
834
                        e->level = e->parameters.sustain;
835
                        e->slope = 0.0f;
836
                        e->samplesUntilNextSegment = 0x7FFFFFFF;
837
                        e->segmentIsExponential = TSF_FALSE;
838
                        return;
839
                case TSF_SEGMENT_SUSTAIN:
840
                        e->segment = TSF_SEGMENT_RELEASE;
841
                        e->samplesUntilNextSegment = (int)((e->parameters.release <= 0 ? TSF_FASTRELEASETIME : e->parameters.release) * outSampleRate);
842
                        if (e->isAmpEnv)
843
                        {
844
                                // I don't truly understand this; just following what LinuxSampler does.
845
                                float mysterySlope = -9.226f / e->samplesUntilNextSegment;
846
                                e->slope = TSF_EXPF(mysterySlope);
847
                                e->segmentIsExponential = TSF_TRUE;
848
                        }
849
                        else
850
                        {
851
                                e->slope = -e->level / e->samplesUntilNextSegment;
852
                                e->segmentIsExponential = TSF_FALSE;
853
                        }
854
                        return;
855
                case TSF_SEGMENT_RELEASE:
856
                default:
857
                        e->segment = TSF_SEGMENT_DONE;
858
                        e->segmentIsExponential = TSF_FALSE;
859
                        e->level = e->slope = 0.0f;
860
                        e->samplesUntilNextSegment = 0x7FFFFFF;
861
        }
862
}
863
 
864
static void tsf_voice_envelope_setup(struct tsf_voice_envelope* e, struct tsf_envelope* new_parameters, int midiNoteNumber, short midiVelocity, TSF_BOOL isAmpEnv, float outSampleRate)
865
{
866
        e->parameters = *new_parameters;
867
        if (e->parameters.keynumToHold)
868
        {
869
                e->parameters.hold += e->parameters.keynumToHold * (60.0f - midiNoteNumber);
870
                e->parameters.hold = (e->parameters.hold < -10000.0f ? 0.0f : tsf_timecents2Secsf(e->parameters.hold));
871
        }
872
        if (e->parameters.keynumToDecay)
873
        {
874
                e->parameters.decay += e->parameters.keynumToDecay * (60.0f - midiNoteNumber);
875
                e->parameters.decay = (e->parameters.decay < -10000.0f ? 0.0f : tsf_timecents2Secsf(e->parameters.decay));
876
        }
877
        e->midiVelocity = midiVelocity;
878
        e->isAmpEnv = isAmpEnv;
879
        tsf_voice_envelope_nextsegment(e, TSF_SEGMENT_NONE, outSampleRate);
880
}
881
 
882
static void tsf_voice_envelope_process(struct tsf_voice_envelope* e, int numSamples, float outSampleRate)
883
{
884
        if (e->slope)
885
        {
886
                if (e->segmentIsExponential) e->level *= TSF_POWF(e->slope, (float)numSamples);
887
                else e->level += (e->slope * numSamples);
888
        }
889
        if ((e->samplesUntilNextSegment -= numSamples) <= 0)
890
                tsf_voice_envelope_nextsegment(e, e->segment, outSampleRate);
891
}
892
 
893
static void tsf_voice_lowpass_setup(struct tsf_voice_lowpass* e, float Fc)
894
{
895
        // Lowpass filter from http://www.earlevel.com/main/2012/11/26/biquad-c-source-code/
896
        double K = TSF_TAN(TSF_PI * Fc), KK = K * K;
897
        double norm = 1 / (1 + K * e->QInv + KK);
898
        e->a0 = KK * norm;
899
        e->a1 = 2 * e->a0;
900
        e->b1 = 2 * (KK - 1) * norm;
901
        e->b2 = (1 - K * e->QInv + KK) * norm;
902
}
903
 
904
static float tsf_voice_lowpass_process(struct tsf_voice_lowpass* e, double In)
905
{
906
        double Out = In * e->a0 + e->z1; e->z1 = In * e->a1 + e->z2 - e->b1 * Out; e->z2 = In * e->a0 - e->b2 * Out; return (float)Out;
907
}
908
 
909
static void tsf_voice_lfo_setup(struct tsf_voice_lfo* e, float delay, int freqCents, float outSampleRate)
910
{
911
        e->samplesUntil = (int)(delay * outSampleRate);
912
        e->delta = (4.0f * tsf_cents2Hertz((float)freqCents) / outSampleRate);
913
        e->level = 0;
914
}
915
 
916
static void tsf_voice_lfo_process(struct tsf_voice_lfo* e, int blockSamples)
917
{
918
        if (e->samplesUntil > blockSamples) { e->samplesUntil -= blockSamples; return; }
919
        e->level += e->delta * blockSamples;
920
        if      (e->level >  1.0f) { e->delta = -e->delta; e->level =  2.0f - e->level; }
921
        else if (e->level < -1.0f) { e->delta = -e->delta; e->level = -2.0f - e->level; }
922
}
923
 
924
static void tsf_voice_kill(struct tsf_voice* v)
925
{
926
        v->playingPreset = -1;
927
}
928
 
929
static void tsf_voice_end(struct tsf_voice* v, float outSampleRate)
930
{
931
        tsf_voice_envelope_nextsegment(&v->ampenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
932
        tsf_voice_envelope_nextsegment(&v->modenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
933
        if (v->region->loop_mode == TSF_LOOPMODE_SUSTAIN)
934
        {
935
                // Continue playing, but stop looping.
936
                v->loopEnd = v->loopStart;
937
        }
938
}
939
 
940
static void tsf_voice_endquick(struct tsf_voice* v, float outSampleRate)
941
{
942
        v->ampenv.parameters.release = 0.0f; tsf_voice_envelope_nextsegment(&v->ampenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
943
        v->modenv.parameters.release = 0.0f; tsf_voice_envelope_nextsegment(&v->modenv, TSF_SEGMENT_SUSTAIN, outSampleRate);
944
}
945
 
946
static void tsf_voice_calcpitchratio(struct tsf_voice* v, float pitchShift, float outSampleRate)
947
{
948
        double note = v->playingKey + v->region->transpose + v->region->tune / 100.0;
949
        double adjustedPitch = v->region->pitch_keycenter + (note - v->region->pitch_keycenter) * (v->region->pitch_keytrack / 100.0);
950
        if (pitchShift) adjustedPitch += pitchShift;
951
        v->pitchInputTimecents = adjustedPitch * 100.0;
952
        v->pitchOutputFactor = v->region->sample_rate / (tsf_timecents2Secsd(v->region->pitch_keycenter * 100.0) * outSampleRate);
953
}
954
 
955
static void tsf_voice_render(tsf* f, struct tsf_voice* v, float* outputBuffer, int numSamples)
956
{
957
        struct tsf_region* region = v->region;
958
        float* input = f->fontSamples;
959
        float* outL = outputBuffer;
960
        float* outR = (f->outputmode == TSF_STEREO_UNWEAVED ? outL + numSamples : TSF_NULL);
961
 
962
        // Cache some values, to give them at least some chance of ending up in registers.
963
        TSF_BOOL updateModEnv = (region->modEnvToPitch || region->modEnvToFilterFc);
964
        TSF_BOOL updateModLFO = (v->modlfo.delta && (region->modLfoToPitch || region->modLfoToFilterFc || region->modLfoToVolume));
965
        TSF_BOOL updateVibLFO = (v->viblfo.delta && (region->vibLfoToPitch));
966
        TSF_BOOL isLooping    = (v->loopStart < v->loopEnd);
967
        unsigned int tmpLoopStart = v->loopStart, tmpLoopEnd = v->loopEnd;
968
        double tmpSampleEndDbl = (double)region->end, tmpLoopEndDbl = (double)tmpLoopEnd + 1.0;
969
        double tmpSourceSamplePosition = v->sourceSamplePosition;
970
        struct tsf_voice_lowpass tmpLowpass = v->lowpass;
971
 
972
        TSF_BOOL dynamicLowpass = (region->modLfoToFilterFc || region->modEnvToFilterFc);
973
        float tmpSampleRate, tmpInitialFilterFc, tmpModLfoToFilterFc, tmpModEnvToFilterFc;
974
 
975
        TSF_BOOL dynamicPitchRatio = (region->modLfoToPitch || region->modEnvToPitch || region->vibLfoToPitch);
976
        double pitchRatio;
977
        float tmpModLfoToPitch, tmpVibLfoToPitch, tmpModEnvToPitch;
978
 
979
        TSF_BOOL dynamicGain = (region->modLfoToVolume != 0);
980
        float noteGain = 0, tmpModLfoToVolume;
981
 
982
        if (dynamicLowpass) tmpSampleRate = f->outSampleRate, tmpInitialFilterFc = (float)region->initialFilterFc, tmpModLfoToFilterFc = (float)region->modLfoToFilterFc, tmpModEnvToFilterFc = (float)region->modEnvToFilterFc;
983
        else tmpSampleRate = 0, tmpInitialFilterFc = 0, tmpModLfoToFilterFc = 0, tmpModEnvToFilterFc = 0;
984
 
985
        if (dynamicPitchRatio) pitchRatio = 0, tmpModLfoToPitch = (float)region->modLfoToPitch, tmpVibLfoToPitch = (float)region->vibLfoToPitch, tmpModEnvToPitch = (float)region->modEnvToPitch;
986
        else pitchRatio = tsf_timecents2Secsd(v->pitchInputTimecents) * v->pitchOutputFactor, tmpModLfoToPitch = 0, tmpVibLfoToPitch = 0, tmpModEnvToPitch = 0;
987
 
988
        if (dynamicGain) tmpModLfoToVolume = (float)region->modLfoToVolume * 0.1f;
989
        else noteGain = tsf_decibelsToGain(v->noteGainDB), tmpModLfoToVolume = 0;
990
 
991
        while (numSamples)
992
        {
993
                float gainMono, gainLeft, gainRight;
994
                int blockSamples = (numSamples > TSF_RENDER_EFFECTSAMPLEBLOCK ? TSF_RENDER_EFFECTSAMPLEBLOCK : numSamples);
995
                numSamples -= blockSamples;
996
 
997
                if (dynamicLowpass)
998
                {
999
                        float fres = tmpInitialFilterFc + v->modlfo.level * tmpModLfoToFilterFc + v->modenv.level * tmpModEnvToFilterFc;
1000
                        tmpLowpass.active = (fres <= 13500.0f);
1001
                        if (tmpLowpass.active) tsf_voice_lowpass_setup(&tmpLowpass, tsf_cents2Hertz(fres) / tmpSampleRate);
1002
                }
1003
 
1004
                if (dynamicPitchRatio)
1005
                        pitchRatio = tsf_timecents2Secsd(v->pitchInputTimecents + (v->modlfo.level * tmpModLfoToPitch + v->viblfo.level * tmpVibLfoToPitch + v->modenv.level * tmpModEnvToPitch)) * v->pitchOutputFactor;
1006
 
1007
                if (dynamicGain)
1008
                        noteGain = tsf_decibelsToGain(v->noteGainDB + (v->modlfo.level * tmpModLfoToVolume));
1009
 
1010
                gainMono = noteGain * v->ampenv.level;
1011
 
1012
                // Update EG.
1013
                tsf_voice_envelope_process(&v->ampenv, blockSamples, f->outSampleRate);
1014
                if (updateModEnv) tsf_voice_envelope_process(&v->modenv, blockSamples, f->outSampleRate);
1015
 
1016
                // Update LFOs.
1017
                if (updateModLFO) tsf_voice_lfo_process(&v->modlfo, blockSamples);
1018
                if (updateVibLFO) tsf_voice_lfo_process(&v->viblfo, blockSamples);
1019
 
1020
                switch (f->outputmode)
1021
                {
1022
                        case TSF_STEREO_INTERLEAVED:
1023
                                gainLeft = gainMono * v->panFactorLeft, gainRight = gainMono * v->panFactorRight;
1024
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1025
                                {
1026
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1027
 
1028
                                        // Simple linear interpolation.
1029
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1030
 
1031
                                        // Low-pass filter.
1032
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1033
 
1034
                                        *outL++ += val * gainLeft;
1035
                                        *outL++ += val * gainRight;
1036
 
1037
                                        // Next sample.
1038
                                        tmpSourceSamplePosition += pitchRatio;
1039
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1040
                                }
1041
                                break;
1042
 
1043
                        case TSF_STEREO_UNWEAVED:
1044
                                gainLeft = gainMono * v->panFactorLeft, gainRight = gainMono * v->panFactorRight;
1045
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1046
                                {
1047
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1048
 
1049
                                        // Simple linear interpolation.
1050
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1051
 
1052
                                        // Low-pass filter.
1053
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1054
 
1055
                                        *outL++ += val * gainLeft;
1056
                                        *outR++ += val * gainRight;
1057
 
1058
                                        // Next sample.
1059
                                        tmpSourceSamplePosition += pitchRatio;
1060
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1061
                                }
1062
                                break;
1063
 
1064
                        case TSF_MONO:
1065
                                while (blockSamples-- && tmpSourceSamplePosition < tmpSampleEndDbl)
1066
                                {
1067
                                        unsigned int pos = (unsigned int)tmpSourceSamplePosition, nextPos = (pos >= tmpLoopEnd && isLooping ? tmpLoopStart : pos + 1);
1068
 
1069
                                        // Simple linear interpolation.
1070
                                        float alpha = (float)(tmpSourceSamplePosition - pos), val = (input[pos] * (1.0f - alpha) + input[nextPos] * alpha);
1071
 
1072
                                        // Low-pass filter.
1073
                                        if (tmpLowpass.active) val = tsf_voice_lowpass_process(&tmpLowpass, val);
1074
 
1075
                                        *outL++ += val * gainMono;
1076
 
1077
                                        // Next sample.
1078
                                        tmpSourceSamplePosition += pitchRatio;
1079
                                        if (tmpSourceSamplePosition >= tmpLoopEndDbl && isLooping) tmpSourceSamplePosition -= (tmpLoopEnd - tmpLoopStart + 1.0);
1080
                                }
1081
                                break;
1082
                }
1083
 
1084
                if (tmpSourceSamplePosition >= tmpSampleEndDbl || v->ampenv.segment == TSF_SEGMENT_DONE)
1085
                {
1086
                        tsf_voice_kill(v);
1087
                        return;
1088
                }
1089
        }
1090
 
1091
        v->sourceSamplePosition = tmpSourceSamplePosition;
1092
        if (tmpLowpass.active || dynamicLowpass) v->lowpass = tmpLowpass;
1093
}
1094
 
1095
TSFDEF tsf* tsf_load(struct tsf_stream* stream)
1096
{
1097
        tsf* res = TSF_NULL;
1098
        struct tsf_riffchunk chunkHead;
1099
        struct tsf_riffchunk chunkList;
1100
        struct tsf_hydra hydra;
1101
        float* fontSamples = TSF_NULL;
1102
        unsigned int fontSampleCount = 0;
1103
 
1104
        if (!tsf_riffchunk_read(TSF_NULL, &chunkHead, stream) || !TSF_FourCCEquals(chunkHead.id, "sfbk"))
1105
        {
1106
                //if (e) *e = TSF_INVALID_NOSF2HEADER;
1107
                return res;
1108
        }
1109
 
1110
        // Read hydra and locate sample data.
1111
        TSF_MEMSET(&hydra, 0, sizeof(hydra));
1112
        while (tsf_riffchunk_read(&chunkHead, &chunkList, stream))
1113
        {
1114
                struct tsf_riffchunk chunk;
1115
                if (TSF_FourCCEquals(chunkList.id, "pdta"))
1116
                {
1117
                        while (tsf_riffchunk_read(&chunkList, &chunk, stream))
1118
                        {
1119
                                #define HandleChunk(chunkName) (TSF_FourCCEquals(chunk.id, #chunkName) && !(chunk.size % chunkName##SizeInFile)) \
1120
                                        { \
1121
                                                int num = chunk.size / chunkName##SizeInFile, i; \
1122
                                                hydra.chunkName##Num = num; \
1123
                                                hydra.chunkName##s = (struct tsf_hydra_##chunkName*)TSF_MALLOC(num * sizeof(struct tsf_hydra_##chunkName)); \
1124
                                                for (i = 0; i < num; ++i) tsf_hydra_read_##chunkName(&hydra.chunkName##s[i], stream); \
1125
                                        }
1126
                                enum
1127
                                {
1128
                                        phdrSizeInFile = 38, pbagSizeInFile =  4, pmodSizeInFile = 10,
1129
                                        pgenSizeInFile =  4, instSizeInFile = 22, ibagSizeInFile =  4,
1130
                                        imodSizeInFile = 10, igenSizeInFile =  4, shdrSizeInFile = 46
1131
                                };
1132
                                if      HandleChunk(phdr) else if HandleChunk(pbag) else if HandleChunk(pmod)
1133
                                else if HandleChunk(pgen) else if HandleChunk(inst) else if HandleChunk(ibag)
1134
                                else if HandleChunk(imod) else if HandleChunk(igen) else if HandleChunk(shdr)
1135
                                else stream->skip(stream->data, chunk.size);
1136
                                #undef HandleChunk
1137
                        }
1138
                }
1139
                else if (TSF_FourCCEquals(chunkList.id, "sdta"))
1140
                {
1141
                        while (tsf_riffchunk_read(&chunkList, &chunk, stream))
1142
                        {
1143
                                if (TSF_FourCCEquals(chunk.id, "smpl"))
1144
                                {
1145
                                        tsf_load_samples(&fontSamples, &fontSampleCount, &chunk, stream);
1146
                                }
1147
                                else stream->skip(stream->data, chunk.size);
1148
                        }
1149
                }
1150
                else stream->skip(stream->data, chunkList.size);
1151
        }
1152
        if (!hydra.phdrs || !hydra.pbags || !hydra.pmods || !hydra.pgens || !hydra.insts || !hydra.ibags || !hydra.imods || !hydra.igens || !hydra.shdrs)
1153
        {
1154
                //if (e) *e = TSF_INVALID_INCOMPLETE;
1155
        }
1156
        else if (fontSamples == TSF_NULL)
1157
        {
1158
                //if (e) *e = TSF_INVALID_NOSAMPLEDATA;
1159
        }
1160
        else
1161
        {
1162
                res = (tsf*)TSF_MALLOC(sizeof(tsf));
1163
                TSF_MEMSET(res, 0, sizeof(tsf));
1164
                res->presetNum = hydra.phdrNum - 1;
1165
                res->presets = (struct tsf_preset*)TSF_MALLOC(res->presetNum * sizeof(struct tsf_preset));
1166
                res->fontSamples = fontSamples;
1167
                res->outSampleRate = 44100.0f;
1168
                fontSamples = TSF_NULL; //don't free below
1169
                tsf_load_presets(res, &hydra, fontSampleCount);
1170
        }
1171
        TSF_FREE(hydra.phdrs); TSF_FREE(hydra.pbags); TSF_FREE(hydra.pmods);
1172
        TSF_FREE(hydra.pgens); TSF_FREE(hydra.insts); TSF_FREE(hydra.ibags);
1173
        TSF_FREE(hydra.imods); TSF_FREE(hydra.igens); TSF_FREE(hydra.shdrs);
1174
        TSF_FREE(fontSamples);
1175
        return res;
1176
}
1177
 
1178
TSFDEF void tsf_close(tsf* f)
1179
{
1180
        struct tsf_preset *preset, *presetEnd;
1181
        if (!f) return;
1182
        for (preset = f->presets, presetEnd = preset + f->presetNum; preset != presetEnd; preset++)
1183
                TSF_FREE(preset->regions);
1184
        TSF_FREE(f->presets);
1185
        TSF_FREE(f->fontSamples);
1186
        TSF_FREE(f->voices);
1187
        if (f->channels) { TSF_FREE(f->channels->channels); TSF_FREE(f->channels); }
1188
        TSF_FREE(f->outputSamples);
1189
        TSF_FREE(f);
1190
}
1191
 
1192
TSFDEF void tsf_reset(tsf* f)
1193
{
1194
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1195
        for (; v != vEnd; v++)
1196
                if (v->playingPreset != -1 && (v->ampenv.segment < TSF_SEGMENT_RELEASE || v->ampenv.parameters.release))
1197
                        tsf_voice_endquick(v, f->outSampleRate);
1198
        if (f->channels) { TSF_FREE(f->channels->channels); TSF_FREE(f->channels); f->channels = TSF_NULL; }
1199
}
1200
 
1201
TSFDEF int tsf_get_presetindex(const tsf* f, int bank, int preset_number)
1202
{
1203
        const struct tsf_preset *presets;
1204
        int i, iMax;
1205
        for (presets = f->presets, i = 0, iMax = f->presetNum; i < iMax; i++)
1206
                if (presets[i].preset == preset_number && presets[i].bank == bank)
1207
                        return i;
1208
        return -1;
1209
}
1210
 
1211
TSFDEF int tsf_get_presetcount(const tsf* f)
1212
{
1213
        return f->presetNum;
1214
}
1215
 
1216
TSFDEF const char* tsf_get_presetname(const tsf* f, int preset)
1217
{
1218
        return (preset < 0 || preset >= f->presetNum ? TSF_NULL : f->presets[preset].presetName);
1219
}
1220
 
1221
TSFDEF const char* tsf_bank_get_presetname(const tsf* f, int bank, int preset_number)
1222
{
1223
        return tsf_get_presetname(f, tsf_get_presetindex(f, bank, preset_number));
1224
}
1225
 
1226
TSFDEF void tsf_set_output(tsf* f, enum TSFOutputMode outputmode, int samplerate, float global_gain_db)
1227
{
1228
        f->outputmode = outputmode;
1229
        f->outSampleRate = (float)(samplerate >= 1 ? samplerate : 44100.0f);
1230
        f->globalGainDB = global_gain_db;
1231
}
1232
 
1233
TSFDEF void tsf_note_on(tsf* f, int preset_index, int key, float vel)
1234
{
1235
        short midiVelocity = (short)(vel * 127);
1236
        int voicePlayIndex;
1237
        struct tsf_region *region, *regionEnd;
1238
 
1239
        if (preset_index < 0 || preset_index >= f->presetNum) return;
1240
        if (vel <= 0.0f) { tsf_note_off(f, preset_index, key); return; }
1241
 
1242
        // Play all matching regions.
1243
        voicePlayIndex = f->voicePlayIndex++;
1244
        for (region = f->presets[preset_index].regions, regionEnd = region + f->presets[preset_index].regionNum; region != regionEnd; region++)
1245
        {
1246
                struct tsf_voice *voice, *v, *vEnd; TSF_BOOL doLoop; float filterQDB;
1247
                if (key < region->lokey || key > region->hikey || midiVelocity < region->lovel || midiVelocity > region->hivel) continue;
1248
 
1249
                voice = TSF_NULL, v = f->voices, vEnd = v + f->voiceNum;
1250
                if (region->group)
1251
                {
1252
                        for (; v != vEnd; v++)
1253
                                if (v->playingPreset == preset_index && v->region->group == region->group) tsf_voice_endquick(v, f->outSampleRate);
1254
                                else if (v->playingPreset == -1 && !voice) voice = v;
1255
                }
1256
                else for (; v != vEnd; v++) if (v->playingPreset == -1) { voice = v; break; }
1257
 
1258
                if (!voice)
1259
                {
1260
                        f->voiceNum += 4;
1261
                        f->voices = (struct tsf_voice*)TSF_REALLOC(f->voices, f->voiceNum * sizeof(struct tsf_voice));
1262
                        voice = &f->voices[f->voiceNum - 4];
1263
                        voice[1].playingPreset = voice[2].playingPreset = voice[3].playingPreset = -1;
1264
                }
1265
 
1266
                voice->region = region;
1267
                voice->playingPreset = preset_index;
1268
                voice->playingKey = key;
1269
                voice->playIndex = voicePlayIndex;
8754 terminx 1270
                voice->noteGainDB = f->globalGainDB - clamp(region->attenuation, 0.f, 144.f) - tsf_gainToDecibels(1.0f / vel);
8752 terminx 1271
 
1272
                if (f->channels)
1273
                {
1274
                        f->channels->setupVoice(f, voice);
1275
                }
1276
                else
1277
                {
1278
                        tsf_voice_calcpitchratio(voice, 0, f->outSampleRate);
1279
                        // 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).
1280
                        voice->panFactorLeft  = TSF_SQRTF(0.5f - region->pan);
1281
                        voice->panFactorRight = TSF_SQRTF(0.5f + region->pan);
1282
                }
1283
 
1284
                // Offset/end.
1285
                voice->sourceSamplePosition = region->offset;
1286
 
1287
                // Loop.
1288
                doLoop = (region->loop_mode != TSF_LOOPMODE_NONE && region->loop_start < region->loop_end);
1289
                voice->loopStart = (doLoop ? region->loop_start : 0);
1290
                voice->loopEnd = (doLoop ? region->loop_end : 0);
1291
 
1292
                // Setup envelopes.
1293
                tsf_voice_envelope_setup(&voice->ampenv, &region->ampenv, key, midiVelocity, TSF_TRUE, f->outSampleRate);
1294
                tsf_voice_envelope_setup(&voice->modenv, &region->modenv, key, midiVelocity, TSF_FALSE, f->outSampleRate);
1295
 
1296
                // Setup lowpass filter.
1297
                filterQDB = region->initialFilterQ / 10.0f;
1298
                voice->lowpass.QInv = 1.0 / TSF_POW(10.0, (filterQDB / 20.0));
1299
                voice->lowpass.z1 = voice->lowpass.z2 = 0;
1300
                voice->lowpass.active = (region->initialFilterFc <= 13500);
1301
                if (voice->lowpass.active) tsf_voice_lowpass_setup(&voice->lowpass, tsf_cents2Hertz((float)region->initialFilterFc) / f->outSampleRate);
1302
 
1303
                // Setup LFO filters.
1304
                tsf_voice_lfo_setup(&voice->modlfo, region->delayModLFO, region->freqModLFO, f->outSampleRate);
1305
                tsf_voice_lfo_setup(&voice->viblfo, region->delayVibLFO, region->freqVibLFO, f->outSampleRate);
1306
        }
1307
}
1308
 
1309
TSFDEF int tsf_bank_note_on(tsf* f, int bank, int preset_number, int key, float vel)
1310
{
1311
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1312
        if (preset_index == -1) return 0;
1313
        tsf_note_on(f, preset_index, key, vel);
1314
        return 1;
1315
}
1316
 
1317
TSFDEF void tsf_note_off(tsf* f, int preset_index, int key)
1318
{
1319
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum, *vMatchFirst = TSF_NULL, *vMatchLast = TSF_NULL;
1320
        for (; v != vEnd; v++)
1321
        {
1322
                //Find the first and last entry in the voices list with matching preset, key and look up the smallest play index
1323
                if (v->playingPreset != preset_index || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE) continue;
1324
                else if (!vMatchFirst || v->playIndex < vMatchFirst->playIndex) vMatchFirst = vMatchLast = v;
1325
                else if (v->playIndex == vMatchFirst->playIndex) vMatchLast = v;
1326
        }
1327
        if (!vMatchFirst) return;
1328
        for (v = vMatchFirst; v <= vMatchLast; v++)
1329
        {
1330
                //Stop all voices with matching preset, key and the smallest play index which was enumerated above
1331
                if (v != vMatchFirst && v != vMatchLast &&
1332
                        (v->playIndex != vMatchFirst->playIndex || v->playingPreset != preset_index || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE)) continue;
1333
                tsf_voice_end(v, f->outSampleRate);
1334
        }
1335
}
1336
 
1337
TSFDEF int tsf_bank_note_off(tsf* f, int bank, int preset_number, int key)
1338
{
1339
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1340
        if (preset_index == -1) return 0;
1341
        tsf_note_off(f, preset_index, key);
1342
        return 1;
1343
}
1344
 
1345
TSFDEF void tsf_note_off_all(tsf* f)
1346
{
1347
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1348
        for (; v != vEnd; v++) if (v->playingPreset != -1 && v->ampenv.segment < TSF_SEGMENT_RELEASE)
1349
                tsf_voice_end(v, f->outSampleRate);
1350
}
1351
 
1352
TSFDEF int tsf_active_voice_count(tsf* f)
1353
{
1354
        int count = 0;
1355
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1356
        for (; v != vEnd; v++) if (v->playingPreset != -1) count++;
1357
        return count;
1358
}
1359
 
1360
TSFDEF void tsf_render_short(tsf* f, short* buffer, int samples, int flag_mixing)
1361
{
1362
        float *floatSamples;
1363
        int channelSamples = (f->outputmode == TSF_MONO ? 1 : 2) * samples, floatBufferSize = channelSamples * sizeof(float);
1364
        short* bufferEnd = buffer + channelSamples;
1365
        if (floatBufferSize > f->outputSampleSize)
1366
        {
1367
                TSF_FREE(f->outputSamples);
1368
                f->outputSamples = (float*)TSF_MALLOC(floatBufferSize);
1369
                f->outputSampleSize = floatBufferSize;
1370
        }
1371
 
1372
        tsf_render_float(f, f->outputSamples, samples, TSF_FALSE);
1373
 
1374
        floatSamples = f->outputSamples;
1375
        if (flag_mixing)
1376
                while (buffer != bufferEnd)
1377
                {
1378
                        float v = *floatSamples++;
1379
                        int vi = *buffer + (v < -1.00004566f ? (int)-32768 : (v > 1.00001514f ? (int)32767 : (int)(v * 32767.5f)));
1380
                        *buffer++ = (vi < -32768 ? (short)-32768 : (vi > 32767 ? (short)32767 : (short)vi));
1381
                }
1382
        else
1383
                while (buffer != bufferEnd)
1384
                {
1385
                        float v = *floatSamples++;
1386
                        *buffer++ = (v < -1.00004566f ? (short)-32768 : (v > 1.00001514f ? (short)32767 : (short)(v * 32767.5f)));
1387
                }
1388
}
1389
 
1390
TSFDEF void tsf_render_float(tsf* f, float* buffer, int samples, int flag_mixing)
1391
{
1392
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1393
        if (!flag_mixing) TSF_MEMSET(buffer, 0, (f->outputmode == TSF_MONO ? 1 : 2) * sizeof(float) * samples);
1394
        for (; v != vEnd; v++)
1395
                if (v->playingPreset != -1)
1396
                        tsf_voice_render(f, v, buffer, samples);
1397
}
1398
 
1399
static void tsf_channel_setup_voice(tsf* f, struct tsf_voice* v)
1400
{
1401
        struct tsf_channel* c = &f->channels->channels[f->channels->activeChannel];
1402
        float newpan = v->region->pan + c->panOffset;
1403
        v->playingChannel = f->channels->activeChannel;
1404
        v->noteGainDB += c->gainDB;
1405
        tsf_voice_calcpitchratio(v, (c->pitchWheel == 8192 ? c->tuning : ((c->pitchWheel / 16383.0f * c->pitchRange * 2.0f) - c->pitchRange + c->tuning)), f->outSampleRate);
1406
        if      (newpan <= -0.5f) { v->panFactorLeft = 1.0f; v->panFactorRight = 0.0f; }
1407
        else if (newpan >=  0.5f) { v->panFactorLeft = 0.0f; v->panFactorRight = 1.0f; }
1408
        else { v->panFactorLeft = TSF_SQRTF(0.5f - newpan); v->panFactorRight = TSF_SQRTF(0.5f + newpan); }
1409
}
1410
 
1411
static struct tsf_channel* tsf_channel_init(tsf* f, int channel)
1412
{
1413
        int i;
1414
        if (f->channels && channel < f->channels->channelNum) return &f->channels->channels[channel];
1415
        if (!f->channels)
1416
        {
1417
                f->channels = (struct tsf_channels*)TSF_MALLOC(sizeof(struct tsf_channels));
1418
                f->channels->setupVoice = &tsf_channel_setup_voice;
1419
                f->channels->channels = NULL;
1420
                f->channels->channelNum = 0;
1421
                f->channels->activeChannel = 0;
1422
        }
1423
        i = f->channels->channelNum;
1424
        f->channels->channelNum = channel + 1;
1425
        f->channels->channels = (struct tsf_channel*)TSF_REALLOC(f->channels->channels, f->channels->channelNum * sizeof(struct tsf_channel));
1426
        for (; i <= channel; i++)
1427
        {
1428
                struct tsf_channel* c = &f->channels->channels[i];
1429
                c->presetIndex = c->bank = 0;
1430
                c->pitchWheel = c->midiPan = 8192;
1431
                c->midiVolume = c->midiExpression = 16383;
1432
                c->midiRPN = 0xFFFF;
1433
                c->midiData = 0;
1434
                c->panOffset = 0.0f;
1435
                c->gainDB = 0.0f;
1436
                c->pitchRange = 2.0f;
1437
                c->tuning = 0.0f;
1438
        }
1439
        return &f->channels->channels[channel];
1440
}
1441
 
1442
static void tsf_channel_applypitch(tsf* f, int channel, struct tsf_channel* c)
1443
{
1444
        struct tsf_voice *v, *vEnd;
1445
        float pitchShift = (c->pitchWheel == 8192 ? c->tuning : ((c->pitchWheel / 16383.0f * c->pitchRange * 2.0f) - c->pitchRange + c->tuning));
1446
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1447
                if (v->playingChannel == channel && v->playingPreset != -1)
1448
                        tsf_voice_calcpitchratio(v, pitchShift, f->outSampleRate);
1449
}
1450
 
1451
TSFDEF void tsf_channel_set_presetindex(tsf* f, int channel, int preset_index)
1452
{
1453
        tsf_channel_init(f, channel)->presetIndex = (unsigned short)preset_index;
1454
}
1455
 
1456
TSFDEF int tsf_channel_set_presetnumber(tsf* f, int channel, int preset_number, int flag_mididrums)
1457
{
1458
        struct tsf_channel *c = tsf_channel_init(f, channel);
1459
        int preset_index;
1460
        if (flag_mididrums)
1461
        {
1462
                preset_index = tsf_get_presetindex(f, 128 | (c->bank & 0x7FFF), preset_number);
1463
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, 128, preset_number);
1464
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, 128, 0);
1465
                if (preset_index == -1) preset_index = tsf_get_presetindex(f, (c->bank & 0x7FFF), preset_number);
1466
        }
1467
        else preset_index = tsf_get_presetindex(f, (c->bank & 0x7FFF), preset_number);
1468
        if (preset_index == -1) preset_index = tsf_get_presetindex(f, 0, preset_number);
1469
        if (preset_index != -1)
1470
        {
1471
                c->presetIndex = (unsigned short)preset_index;
1472
                return 1;
1473
        }
1474
        return 0;
1475
}
1476
 
1477
TSFDEF void tsf_channel_set_bank(tsf* f, int channel, int bank)
1478
{
1479
        tsf_channel_init(f, channel)->bank = (unsigned short)bank;
1480
}
1481
 
1482
TSFDEF int tsf_channel_set_bank_preset(tsf* f, int channel, int bank, int preset_number)
1483
{
1484
        struct tsf_channel *c = tsf_channel_init(f, channel);
1485
        int preset_index = tsf_get_presetindex(f, bank, preset_number);
1486
        if (preset_index == -1) return 0;
1487
        c->presetIndex = (unsigned short)preset_index;
1488
        c->bank = (unsigned short)bank;
1489
        return 1;
1490
}
1491
 
1492
TSFDEF void tsf_channel_set_pan(tsf* f, int channel, float pan)
1493
{
1494
        struct tsf_voice *v, *vEnd;
1495
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1496
                if (v->playingChannel == channel && v->playingPreset != -1)
1497
                {
1498
                        float newpan = v->region->pan + pan - 0.5f;
1499
                        if      (newpan <= -0.5f) { v->panFactorLeft = 1.0f; v->panFactorRight = 0.0f; }
1500
                        else if (newpan >=  0.5f) { v->panFactorLeft = 0.0f; v->panFactorRight = 1.0f; }
1501
                        else { v->panFactorLeft = TSF_SQRTF(0.5f - newpan); v->panFactorRight = TSF_SQRTF(0.5f + newpan); }
1502
                }
1503
        tsf_channel_init(f, channel)->panOffset = pan - 0.5f;
1504
}
1505
 
1506
TSFDEF void tsf_channel_set_volume(tsf* f, int channel, float volume)
1507
{
1508
        struct tsf_channel *c = tsf_channel_init(f, channel);
1509
        float gainDB = tsf_gainToDecibels(volume), gainDBChange = gainDB - c->gainDB;
1510
        struct tsf_voice *v, *vEnd;
1511
        if (gainDBChange == 0) return;
1512
        for (v = f->voices, vEnd = v + f->voiceNum; v != vEnd; v++)
1513
                if (v->playingChannel == channel && v->playingPreset != -1)
1514
                        v->noteGainDB += gainDBChange;
1515
        c->gainDB = gainDB;
1516
}
1517
 
1518
TSFDEF void tsf_channel_set_pitchwheel(tsf* f, int channel, int pitch_wheel)
1519
{
1520
        struct tsf_channel *c = tsf_channel_init(f, channel);
1521
        if (c->pitchWheel == pitch_wheel) return;
1522
        c->pitchWheel = (unsigned short)pitch_wheel;
1523
        tsf_channel_applypitch(f, channel, c);
1524
}
1525
 
1526
TSFDEF void tsf_channel_set_pitchrange(tsf* f, int channel, float pitch_range)
1527
{
1528
        struct tsf_channel *c = tsf_channel_init(f, channel);
1529
        if (c->pitchRange == pitch_range) return;
1530
        c->pitchRange = pitch_range;
1531
        if (c->pitchWheel != 8192) tsf_channel_applypitch(f, channel, c);
1532
}
1533
 
1534
TSFDEF void tsf_channel_set_tuning(tsf* f, int channel, float tuning)
1535
{
1536
        struct tsf_channel *c = tsf_channel_init(f, channel);
1537
        if (c->tuning == tuning) return;
1538
        c->tuning = tuning;
1539
        tsf_channel_applypitch(f, channel, c);
1540
}
1541
 
1542
TSFDEF void tsf_channel_note_on(tsf* f, int channel, int key, float vel)
1543
{
1544
        if (!f->channels || channel >= f->channels->channelNum) return;
1545
        f->channels->activeChannel = channel;
1546
        tsf_note_on(f, f->channels->channels[channel].presetIndex, key, vel);
1547
}
1548
 
1549
TSFDEF void tsf_channel_note_off(tsf* f, int channel, int key)
1550
{
1551
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum, *vMatchFirst = TSF_NULL, *vMatchLast = TSF_NULL;
1552
        for (; v != vEnd; v++)
1553
        {
1554
                //Find the first and last entry in the voices list with matching channel, key and look up the smallest play index
1555
                if (v->playingPreset == -1 || v->playingChannel != channel || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE) continue;
1556
                else if (!vMatchFirst || v->playIndex < vMatchFirst->playIndex) vMatchFirst = vMatchLast = v;
1557
                else if (v->playIndex == vMatchFirst->playIndex) vMatchLast = v;
1558
        }
1559
        if (!vMatchFirst) return;
1560
        for (v = vMatchFirst; v <= vMatchLast; v++)
1561
        {
1562
                //Stop all voices with matching channel, key and the smallest play index which was enumerated above
1563
                if (v != vMatchFirst && v != vMatchLast &&
1564
                        (v->playIndex != vMatchFirst->playIndex || v->playingPreset == -1 || v->playingChannel != channel || v->playingKey != key || v->ampenv.segment >= TSF_SEGMENT_RELEASE)) continue;
1565
                tsf_voice_end(v, f->outSampleRate);
1566
        }
1567
}
1568
 
1569
TSFDEF void tsf_channel_note_off_all(tsf* f, int channel)
1570
{
1571
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1572
        for (; v != vEnd; v++)
1573
                if (v->playingPreset != -1 && v->playingChannel == channel && v->ampenv.segment < TSF_SEGMENT_RELEASE)
1574
                        tsf_voice_end(v, f->outSampleRate);
1575
}
1576
 
1577
TSFDEF void tsf_channel_sounds_off_all(tsf* f, int channel)
1578
{
1579
        struct tsf_voice *v = f->voices, *vEnd = v + f->voiceNum;
1580
        for (; v != vEnd; v++)
1581
                if (v->playingPreset != -1 && v->playingChannel == channel && (v->ampenv.segment < TSF_SEGMENT_RELEASE || v->ampenv.parameters.release))
1582
                        tsf_voice_endquick(v, f->outSampleRate);
1583
}
1584
 
1585
TSFDEF void tsf_channel_midi_control(tsf* f, int channel, int controller, int control_value)
1586
{
1587
        struct tsf_channel* c = tsf_channel_init(f, channel);
1588
        switch (controller)
1589
        {
1590
                case   7 /*VOLUME_MSB*/      : c->midiVolume     = (unsigned short)((c->midiVolume     & 0x7F  ) | (control_value << 7)); goto TCMC_SET_VOLUME;
1591
                case  39 /*VOLUME_LSB*/      : c->midiVolume     = (unsigned short)((c->midiVolume     & 0x3F80) |  control_value);       goto TCMC_SET_VOLUME;
1592
                case  11 /*EXPRESSION_MSB*/  : c->midiExpression = (unsigned short)((c->midiExpression & 0x7F  ) | (control_value << 7)); goto TCMC_SET_VOLUME;
1593
                case  43 /*EXPRESSION_LSB*/  : c->midiExpression = (unsigned short)((c->midiExpression & 0x3F80) |  control_value);       goto TCMC_SET_VOLUME;
1594
                case  10 /*PAN_MSB*/         : c->midiPan        = (unsigned short)((c->midiPan        & 0x7F  ) | (control_value << 7)); goto TCMC_SET_PAN;
1595
                case  42 /*PAN_LSB*/         : c->midiPan        = (unsigned short)((c->midiPan        & 0x3F80) |  control_value);       goto TCMC_SET_PAN;
1596
                case   6 /*DATA_ENTRY_MSB*/  : c->midiData       = (unsigned short)((c->midiData       & 0x7F)   | (control_value << 7)); goto TCMC_SET_DATA;
1597
                case  38 /*DATA_ENTRY_LSB*/  : c->midiData       = (unsigned short)((c->midiData       & 0x3F80) |  control_value);       goto TCMC_SET_DATA;
1598
                case   0 /*BANK_SELECT_MSB*/ : c->bank = (unsigned short)(0x8000 | control_value); return; //bank select MSB alone acts like LSB
1599
                case  32 /*BANK_SELECT_LSB*/ : c->bank = (unsigned short)((c->bank & 0x8000 ? ((c->bank & 0x7F) << 7) : 0) | control_value); return;
1600
                case 101 /*RPN_MSB*/         : c->midiRPN = (unsigned short)(((c->midiRPN == 0xFFFF ? 0 : c->midiRPN) & 0x7F  ) | (control_value << 7)); return;
1601
                case 100 /*RPN_LSB*/         : c->midiRPN = (unsigned short)(((c->midiRPN == 0xFFFF ? 0 : c->midiRPN) & 0x3F80) |  control_value); return;
1602
                case  98 /*NRPN_LSB*/        : c->midiRPN = 0xFFFF; return;
1603
                case  99 /*NRPN_MSB*/        : c->midiRPN = 0xFFFF; return;
1604
                case 120 /*ALL_SOUND_OFF*/   : tsf_channel_sounds_off_all(f, channel); return;
1605
                case 123 /*ALL_NOTES_OFF*/   : tsf_channel_note_off_all(f, channel);   return;
1606
                case 121 /*ALL_CTRL_OFF*/    :
1607
                        c->midiVolume = c->midiExpression = 16383;
1608
                        c->midiPan = 8192;
1609
                        c->bank = 0;
1610
                        tsf_channel_set_volume(f, channel, 1.0f);
1611
                        tsf_channel_set_pan(f, channel, 0.5f);
1612
                        tsf_channel_set_pitchrange(f, channel, 2.0f);
1613
                        return;
1614
        }
1615
        return;
1616
TCMC_SET_VOLUME:
1617
        //Raising to the power of 3 seems to result in a decent sounding volume curve for MIDI
1618
        tsf_channel_set_volume(f, channel, TSF_POWF((c->midiVolume / 16383.0f) * (c->midiExpression / 16383.0f), 3.0f));
1619
        return;
1620
TCMC_SET_PAN:
1621
        tsf_channel_set_pan(f, channel, c->midiPan / 16383.0f);
1622
        return;
1623
TCMC_SET_DATA:
1624
        if      (c->midiRPN == 0) tsf_channel_set_pitchrange(f, channel, (c->midiData >> 7) + 0.01f * (c->midiData & 0x7F));
1625
        else if (c->midiRPN == 1) tsf_channel_set_tuning(f, channel, (int)c->tuning + ((float)c->midiData - 8192.0f) / 8192.0f); //fine tune
1626
        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
1627
        return;
1628
}
1629
 
1630
TSFDEF int tsf_channel_get_preset_index(tsf* f, int channel)
1631
{
1632
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].presetIndex : 0);
1633
}
1634
 
1635
TSFDEF int tsf_channel_get_preset_bank(tsf* f, int channel)
1636
{
1637
        return (f->channels && channel < f->channels->channelNum ? (f->channels->channels[channel].bank & 0x7FFF) : 0);
1638
}
1639
 
1640
TSFDEF int tsf_channel_get_preset_number(tsf* f, int channel)
1641
{
1642
        return (f->channels && channel < f->channels->channelNum ? f->presets[f->channels->channels[channel].presetIndex].preset : 0);
1643
}
1644
 
1645
TSFDEF float tsf_channel_get_pan(tsf* f, int channel)
1646
{
1647
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].panOffset - 0.5f : 0.5f);
1648
}
1649
 
1650
TSFDEF float tsf_channel_get_volume(tsf* f, int channel)
1651
{
1652
        return (f->channels && channel < f->channels->channelNum ? tsf_decibelsToGain(f->channels->channels[channel].gainDB) : 1.0f);
1653
}
1654
 
1655
TSFDEF int tsf_channel_get_pitchwheel(tsf* f, int channel)
1656
{
1657
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].pitchWheel : 8192);
1658
}
1659
 
1660
TSFDEF float tsf_channel_get_pitchrange(tsf* f, int channel)
1661
{
1662
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].pitchRange : 2.0f);
1663
}
1664
 
1665
TSFDEF float tsf_channel_get_tuning(tsf* f, int channel)
1666
{
1667
        return (f->channels && channel < f->channels->channelNum ? f->channels->channels[channel].tuning : 0.0f);
1668
}
1669
 
1670
#ifdef __cplusplus
1671
}
1672
#endif
1673
 
1674
#endif //TSF_IMPLEMENTATION