/[svn]/libgig/trunk/src/gig.h
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Wed Mar 9 22:02:40 2005 UTC (19 years, 1 month ago) by persson
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* src/gig.h, src/gig.cpp: 24-bit decompression now supports the 20 and
  18 bit formats
* src/gig.h, src/gig.cpp: added "random" and "round robin" dimensions
1 schoenebeck 2 /***************************************************************************
2     * *
3     * libgig - C++ cross-platform Gigasampler format file loader library *
4     * *
5 schoenebeck 384 * Copyright (C) 2003-2005 by Christian Schoenebeck *
6     * <cuse@users.sourceforge.net> *
7 schoenebeck 2 * *
8     * This library is free software; you can redistribute it and/or modify *
9     * it under the terms of the GNU General Public License as published by *
10     * the Free Software Foundation; either version 2 of the License, or *
11     * (at your option) any later version. *
12     * *
13     * This library is distributed in the hope that it will be useful, *
14     * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16     * GNU General Public License for more details. *
17     * *
18     * You should have received a copy of the GNU General Public License *
19     * along with this library; if not, write to the Free Software *
20     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21     * MA 02111-1307 USA *
22     ***************************************************************************/
23    
24     #ifndef __GIG_H__
25     #define __GIG_H__
26    
27     #include "DLS.h"
28    
29     #include <math.h>
30     #include <string.h>
31    
32     /// Initial size of the sample buffer which is used for decompression of
33     /// compressed sample wave streams - this value should always be bigger than
34     /// the biggest sample piece expected to be read by the sampler engine,
35     /// otherwise the buffer size will be raised at runtime and thus the buffer
36     /// reallocated which is time consuming and unefficient.
37     #define INITIAL_SAMPLE_BUFFER_SIZE 512000 // 512 kB
38    
39 schoenebeck 11 #if WORDS_BIGENDIAN
40 schoenebeck 2 # define LIST_TYPE_3PRG 0x33707267
41     # define LIST_TYPE_3EWL 0x3365776C
42     # define CHUNK_ID_SMPL 0x736D706C
43     # define CHUNK_ID_3GIX 0x33676978
44     # define CHUNK_ID_3EWA 0x33657761
45     # define CHUNK_ID_3LNK 0x336C6E6B
46     # define CHUNK_ID_3EWG 0x33657767
47     # define CHUNK_ID_EWAV 0x65776176
48     #else // little endian
49     # define LIST_TYPE_3PRG 0x67727033
50     # define LIST_TYPE_3EWL 0x6C776533
51     # define CHUNK_ID_SMPL 0x6C706D73
52     # define CHUNK_ID_3GIX 0x78696733
53     # define CHUNK_ID_3EWA 0x61776533
54     # define CHUNK_ID_3LNK 0x6B6E6C33
55     # define CHUNK_ID_3EWG 0x67776533
56     # define CHUNK_ID_EWAV 0x76617765
57     #endif // WORDS_BIGENDIAN
58    
59     /** (so far) every exponential paramater in the gig format has a basis of 1.000000008813822 */
60 schoenebeck 16 #define GIG_EXP_DECODE(x) (pow(1.000000008813822, x))
61     #define GIG_PITCH_TRACK_EXTRACT(x) (!(x & 0x01))
62     #define GIG_VCF_RESONANCE_CTRL_EXTRACT(x) ((x >> 4) & 0x03)
63     #define GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(x) ((x >> 1) & 0x03)
64     #define GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(x) ((x >> 3) & 0x03)
65     #define GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(x) ((x >> 5) & 0x03)
66 schoenebeck 2
67     /** Gigasampler specific classes and definitions */
68     namespace gig {
69    
70     typedef std::string String;
71    
72     /** Lower and upper limit of a range. */
73     struct range_t {
74     uint8_t low; ///< Low value of range.
75     uint8_t high; ///< High value of range.
76     };
77    
78     /** Pointer address and size of a buffer. */
79     struct buffer_t {
80     void* pStart; ///< Points to the beginning of the buffer.
81     unsigned long Size; ///< Size of the actual data in the buffer in bytes.
82     unsigned long NullExtensionSize; ///< The buffer might be bigger than the actual data, if that's the case that unused space at the end of the buffer is filled with NULLs and NullExtensionSize reflects that unused buffer space in bytes. Those NULL extensions are mandatory for differential algorithms that have to take the following data words into account, thus have to access past the buffer's boundary. If you don't know what I'm talking about, just forget this variable. :)
83 schoenebeck 384 buffer_t() {
84     pStart = NULL;
85     Size = 0;
86     NullExtensionSize = 0;
87     }
88 schoenebeck 2 };
89    
90     /** Standard types of sample loops. */
91     typedef enum {
92     loop_type_normal = 0x00000000, ///< Loop forward (normal)
93     loop_type_bidirectional = 0x00000001, ///< Alternating loop (forward/backward, also known as Ping Pong)
94     loop_type_backward = 0x00000002 ///< Loop backward (reverse)
95     } loop_type_t;
96    
97     /** Society of Motion Pictures and Television E time format. */
98     typedef enum {
99     smpte_format_no_offset = 0x00000000, ///< no SMPTE offset
100     smpte_format_24_frames = 0x00000018, ///< 24 frames per second
101     smpte_format_25_frames = 0x00000019, ///< 25 frames per second
102     smpte_format_30_frames_dropping = 0x0000001D, ///< 30 frames per second with frame dropping (30 drop)
103     smpte_format_30_frames = 0x0000001E ///< 30 frames per second
104     } smpte_format_t;
105    
106     /** Defines the shape of a function graph. */
107     typedef enum {
108     curve_type_nonlinear = 0,
109     curve_type_linear = 1,
110     curve_type_special = 2,
111     curve_type_unknown = 0xffffffff
112     } curve_type_t;
113    
114     /** Dimensions allow to bypass one of the following controllers. */
115     typedef enum {
116     dim_bypass_ctrl_none,
117     dim_bypass_ctrl_94, ///< Effect 4 Depth (MIDI Controller 94)
118     dim_bypass_ctrl_95 ///< Effect 5 Depth (MIDI Controller 95)
119     } dim_bypass_ctrl_t;
120    
121     /** Defines how LFO3 is controlled by. */
122     typedef enum {
123     lfo3_ctrl_internal = 0x00, ///< Only internally controlled.
124     lfo3_ctrl_modwheel = 0x01, ///< Only controlled by external modulation wheel.
125     lfo3_ctrl_aftertouch = 0x02, ///< Only controlled by aftertouch controller.
126     lfo3_ctrl_internal_modwheel = 0x03, ///< Controlled internally and by external modulation wheel.
127     lfo3_ctrl_internal_aftertouch = 0x04 ///< Controlled internally and by aftertouch controller.
128     } lfo3_ctrl_t;
129    
130     /** Defines how LFO2 is controlled by. */
131     typedef enum {
132     lfo2_ctrl_internal = 0x00, ///< Only internally controlled.
133     lfo2_ctrl_modwheel = 0x01, ///< Only controlled by external modulation wheel.
134     lfo2_ctrl_foot = 0x02, ///< Only controlled by external foot controller.
135     lfo2_ctrl_internal_modwheel = 0x03, ///< Controlled internally and by external modulation wheel.
136     lfo2_ctrl_internal_foot = 0x04 ///< Controlled internally and by external foot controller.
137     } lfo2_ctrl_t;
138    
139     /** Defines how LFO1 is controlled by. */
140     typedef enum {
141     lfo1_ctrl_internal = 0x00, ///< Only internally controlled.
142     lfo1_ctrl_modwheel = 0x01, ///< Only controlled by external modulation wheel.
143     lfo1_ctrl_breath = 0x02, ///< Only controlled by external breath controller.
144     lfo1_ctrl_internal_modwheel = 0x03, ///< Controlled internally and by external modulation wheel.
145     lfo1_ctrl_internal_breath = 0x04 ///< Controlled internally and by external breath controller.
146     } lfo1_ctrl_t;
147    
148     /** Defines how the filter cutoff frequency is controlled by. */
149     typedef enum {
150     vcf_cutoff_ctrl_none = 0x00,
151     vcf_cutoff_ctrl_modwheel = 0x81, ///< Modulation Wheel (MIDI Controller 1)
152     vcf_cutoff_ctrl_effect1 = 0x8c, ///< Effect Controller 1 (Coarse, MIDI Controller 12)
153     vcf_cutoff_ctrl_effect2 = 0x8d, ///< Effect Controller 2 (Coarse, MIDI Controller 13)
154     vcf_cutoff_ctrl_breath = 0x82, ///< Breath Controller (Coarse, MIDI Controller 2)
155     vcf_cutoff_ctrl_foot = 0x84, ///< Foot Pedal (Coarse, MIDI Controller 4)
156     vcf_cutoff_ctrl_sustainpedal = 0xc0, ///< Sustain Pedal (MIDI Controller 64)
157     vcf_cutoff_ctrl_softpedal = 0xc3, ///< Soft Pedal (MIDI Controller 67)
158     vcf_cutoff_ctrl_genpurpose7 = 0xd2, ///< General Purpose Controller 7 (Button, MIDI Controller 82)
159     vcf_cutoff_ctrl_genpurpose8 = 0xd3, ///< General Purpose Controller 8 (Button, MIDI Controller 83)
160     vcf_cutoff_ctrl_aftertouch = 0x80 ///< Key Pressure
161     } vcf_cutoff_ctrl_t;
162    
163     /** Defines how the filter resonance is controlled by. */
164     typedef enum {
165     vcf_res_ctrl_none = 0xffffffff,
166     vcf_res_ctrl_genpurpose3 = 0, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)
167     vcf_res_ctrl_genpurpose4 = 1, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)
168     vcf_res_ctrl_genpurpose5 = 2, ///< General Purpose Controller 5 (Button, MIDI Controller 80)
169     vcf_res_ctrl_genpurpose6 = 3 ///< General Purpose Controller 6 (Button, MIDI Controller 81)
170     } vcf_res_ctrl_t;
171 schoenebeck 55
172 schoenebeck 36 /**
173     * Defines a controller that has a certain contrained influence on a
174     * particular synthesis parameter (used to define attenuation controller,
175     * EG1 controller and EG2 controller).
176     *
177     * You should use the respective <i>typedef</i> (means either
178     * attenuation_ctrl_t, eg1_ctrl_t or eg2_ctrl_t) in your code!
179     */
180     struct leverage_ctrl_t {
181     typedef enum {
182     type_none = 0x00, ///< No controller defined
183     type_channelaftertouch = 0x2f, ///< Channel Key Pressure
184     type_velocity = 0xff, ///< Key Velocity
185     type_controlchange = 0xfe ///< Ordinary MIDI control change controller, see field 'controller_number'
186     } type_t;
187 schoenebeck 55
188 schoenebeck 36 type_t type; ///< Controller type
189     uint controller_number; ///< MIDI controller number if this controller is a control change controller, 0 otherwise
190     };
191 schoenebeck 55
192 schoenebeck 36 /**
193     * Defines controller influencing attenuation.
194     *
195     * @see leverage_ctrl_t
196     */
197     typedef leverage_ctrl_t attenuation_ctrl_t;
198 schoenebeck 55
199 schoenebeck 36 /**
200     * Defines controller influencing envelope generator 1.
201     *
202     * @see leverage_ctrl_t
203     */
204     typedef leverage_ctrl_t eg1_ctrl_t;
205 schoenebeck 55
206 schoenebeck 36 /**
207     * Defines controller influencing envelope generator 2.
208     *
209     * @see leverage_ctrl_t
210     */
211     typedef leverage_ctrl_t eg2_ctrl_t;
212 schoenebeck 2
213     /**
214     * Defines the type of dimension, that is how the dimension zones (and
215     * thus how the dimension regions are selected by. The number of
216     * dimension zones is always a power of two. All dimensions can have up
217     * to 32 zones (except the layer dimension with only up to 8 zones and
218     * the samplechannel dimension which currently allows only 2 zones).
219     */
220     typedef enum {
221     dimension_none = 0x00, ///< Dimension not in use.
222     dimension_samplechannel = 0x80, ///< If used sample has more than one channel (thus is not mono).
223     dimension_layer = 0x81, ///< For layering of up to 8 instruments (and eventually crossfading of 2 or 4 layers).
224     dimension_velocity = 0x82, ///< Key Velocity (this is the only dimension where the ranges can exactly be defined).
225     dimension_channelaftertouch = 0x83, ///< Channel Key Pressure
226     dimension_releasetrigger = 0x84, ///< Special dimension for triggering samples on releasing a key.
227 schoenebeck 353 dimension_keyboard = 0x85, ///< Dimension for keyswitching
228 persson 437 dimension_roundrobin = 0x86, ///< Different samples triggered each time a note is played, dimension regions selected in sequence
229     dimension_random = 0x87, ///< Different samples triggered each time a note is played, random order
230 schoenebeck 2 dimension_modwheel = 0x01, ///< Modulation Wheel (MIDI Controller 1)
231     dimension_breath = 0x02, ///< Breath Controller (Coarse, MIDI Controller 2)
232     dimension_foot = 0x04, ///< Foot Pedal (Coarse, MIDI Controller 4)
233     dimension_portamentotime = 0x05, ///< Portamento Time (Coarse, MIDI Controller 5)
234     dimension_effect1 = 0x0c, ///< Effect Controller 1 (Coarse, MIDI Controller 12)
235     dimension_effect2 = 0x0d, ///< Effect Controller 2 (Coarse, MIDI Controller 13)
236     dimension_genpurpose1 = 0x10, ///< General Purpose Controller 1 (Slider, MIDI Controller 16)
237     dimension_genpurpose2 = 0x11, ///< General Purpose Controller 2 (Slider, MIDI Controller 17)
238     dimension_genpurpose3 = 0x12, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)
239     dimension_genpurpose4 = 0x13, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)
240     dimension_sustainpedal = 0x40, ///< Sustain Pedal (MIDI Controller 64)
241     dimension_portamento = 0x41, ///< Portamento (MIDI Controller 65)
242     dimension_sostenutopedal = 0x42, ///< Sostenuto Pedal (MIDI Controller 66)
243     dimension_softpedal = 0x43, ///< Soft Pedal (MIDI Controller 67)
244     dimension_genpurpose5 = 0x30, ///< General Purpose Controller 5 (Button, MIDI Controller 80)
245     dimension_genpurpose6 = 0x31, ///< General Purpose Controller 6 (Button, MIDI Controller 81)
246     dimension_genpurpose7 = 0x32, ///< General Purpose Controller 7 (Button, MIDI Controller 82)
247     dimension_genpurpose8 = 0x33, ///< General Purpose Controller 8 (Button, MIDI Controller 83)
248     dimension_effect1depth = 0x5b, ///< Effect 1 Depth (MIDI Controller 91)
249     dimension_effect2depth = 0x5c, ///< Effect 2 Depth (MIDI Controller 92)
250     dimension_effect3depth = 0x5d, ///< Effect 3 Depth (MIDI Controller 93)
251     dimension_effect4depth = 0x5e, ///< Effect 4 Depth (MIDI Controller 94)
252     dimension_effect5depth = 0x5f ///< Effect 5 Depth (MIDI Controller 95)
253     } dimension_t;
254    
255     /**
256     * Intended for internal usage: will be used to convert a dimension value
257     * into the corresponding dimension bit number.
258     */
259     typedef enum {
260     split_type_normal, ///< dimension value between 0-127, no custom range of zones
261     split_type_customvelocity, ///< a velocity dimension split with custom range definition for each zone (if a velocity dimension split has no custom defined zone ranges then it's also just of type split_type_normal)
262     split_type_bit ///< dimension values are already the sought bit number
263     } split_type_t;
264    
265     /** General dimension definition. */
266     struct dimension_def_t {
267     dimension_t dimension; ///< Specifies which source (usually a MIDI controller) is associated with the dimension.
268     uint8_t bits; ///< Number of "bits" (1 bit = 2 splits/zones, 2 bit = 4 splits/zones, 3 bit = 8 splits/zones,...).
269     uint8_t zones; ///< Number of zones the dimension has.
270     split_type_t split_type; ///< Intended for internal usage: will be used to convert a dimension value into the corresponding dimension bit number.
271     range_t* ranges; ///< Intended for internal usage: Points to the beginning of a range_t array which reflects the value ranges of each dimension zone (only if custom defined ranges are defined, is NULL otherwise).
272     unsigned int zone_size; ///< Intended for internal usage: reflects the size of each zone (128/zones) for normal split types only, 0 otherwise.
273     };
274    
275     /** Defines which frequencies are filtered by the VCF. */
276     typedef enum {
277     vcf_type_lowpass = 0x00,
278     vcf_type_lowpassturbo = 0xff, ///< More poles than normal lowpass
279     vcf_type_bandpass = 0x01,
280     vcf_type_highpass = 0x02,
281     vcf_type_bandreject = 0x03
282     } vcf_type_t;
283    
284 schoenebeck 345 /**
285     * Defines the envelope of a crossfade.
286     *
287     * Note: The default value for crossfade points is 0,0,0,0. Layers with
288     * such a default value should be treated as if they would not have a
289 schoenebeck 353 * crossfade.
290 schoenebeck 345 */
291 schoenebeck 2 struct crossfade_t {
292     #if WORDS_BIGENDIAN
293 schoenebeck 345 uint8_t out_end; ///< End postition of fade out.
294     uint8_t out_start; ///< Start position of fade out.
295     uint8_t in_end; ///< End position of fade in.
296 schoenebeck 2 uint8_t in_start; ///< Start position of fade in.
297 schoenebeck 345 #else // little endian
298     uint8_t in_start; ///< Start position of fade in.
299 schoenebeck 2 uint8_t in_end; ///< End position of fade in.
300     uint8_t out_start; ///< Start position of fade out.
301     uint8_t out_end; ///< End postition of fade out.
302     #endif // WORDS_BIGENDIAN
303     };
304    
305 schoenebeck 24 /** Reflects the current playback state for a sample. */
306     struct playback_state_t {
307     unsigned long position; ///< Current position within the sample.
308     bool reverse; ///< If playback direction is currently backwards (in case there is a pingpong or reverse loop defined).
309     unsigned long loop_cycles_left; ///< How many times the loop has still to be passed, this value will be decremented with each loop cycle.
310     };
311    
312 schoenebeck 2 // just symbol prototyping
313     class File;
314     class Instrument;
315     class Sample;
316 capela 310 class Region;
317 schoenebeck 2
318     /** Encapsulates articulation information of a dimension region.
319     *
320     * Every Gigasampler Instrument has at least one dimension region
321     * (exactly then when it has no dimension defined).
322     *
323     * Gigasampler provides three Envelope Generators and Low Frequency
324     * Oscillators:
325     *
326     * - EG1 and LFO1, both controlling sample amplitude
327     * - EG2 and LFO2, both controlling filter cutoff frequency
328     * - EG3 and LFO3, both controlling sample pitch
329     */
330     class DimensionRegion : protected DLS::Sampler {
331     public:
332     uint8_t VelocityUpperLimit; ///< Defines the upper velocity value limit of a velocity split (only if an user defined limit was set, thus a value not equal to 128/NumberOfSplits, else this value is 0).
333     Sample* pSample; ///< Points to the Sample which is assigned to the dimension region.
334     // Sample Amplitude EG/LFO
335     uint16_t EG1PreAttack; ///< Preattack value of the sample amplitude EG (0 - 1000 permille).
336     double EG1Attack; ///< Attack time of the sample amplitude EG (0.000 - 60.000s).
337     double EG1Decay1; ///< Decay time of the sample amplitude EG (0.000 - 60.000s).
338     double EG1Decay2; ///< Only if <i>EG1InfiniteSustain == false</i>: 2nd decay stage time of the sample amplitude EG (0.000 - 60.000s).
339     bool EG1InfiniteSustain; ///< If <i>true</i>, instead of going into Decay2 phase, Decay1 level will be hold until note will be released.
340     uint16_t EG1Sustain; ///< Sustain value of the sample amplitude EG (0 - 1000 permille).
341     double EG1Release; ///< Release time of the sample amplitude EG (0.000 - 60.000s).
342     bool EG1Hold; ///< If <i>true</i>, Decay1 stage should be postponed until the sample reached the sample loop start.
343     eg1_ctrl_t EG1Controller; ///< MIDI Controller which has influence on sample amplitude EG parameters (attack, decay, release).
344     bool EG1ControllerInvert; ///< Invert values coming from defined EG1 controller.
345 schoenebeck 36 uint8_t EG1ControllerAttackInfluence; ///< Amount EG1 Controller has influence on the EG1 Attack time (0 - 3, where 0 means off).
346     uint8_t EG1ControllerDecayInfluence; ///< Amount EG1 Controller has influence on the EG1 Decay time (0 - 3, where 0 means off).
347     uint8_t EG1ControllerReleaseInfluence; ///< Amount EG1 Controller has influence on the EG1 Release time (0 - 3, where 0 means off).
348 schoenebeck 2 double LFO1Frequency; ///< Frequency of the sample amplitude LFO (0.10 - 10.00 Hz).
349     uint16_t LFO1InternalDepth; ///< Firm pitch of the sample amplitude LFO (0 - 1200 cents).
350     uint16_t LFO1ControlDepth; ///< Controller depth influencing sample amplitude LFO pitch (0 - 1200 cents).
351     lfo1_ctrl_t LFO1Controller; ///< MIDI Controller which controls sample amplitude LFO.
352     bool LFO1FlipPhase; ///< Inverts phase of the sample amplitude LFO wave.
353     bool LFO1Sync; ///< If set to <i>true</i> only one LFO should be used for all voices.
354     // Filter Cutoff Frequency EG/LFO
355     uint16_t EG2PreAttack; ///< Preattack value of the filter cutoff EG (0 - 1000 permille).
356     double EG2Attack; ///< Attack time of the filter cutoff EG (0.000 - 60.000s).
357     double EG2Decay1; ///< Decay time of the filter cutoff EG (0.000 - 60.000s).
358     double EG2Decay2; ///< Only if <i>EG2InfiniteSustain == false</i>: 2nd stage decay time of the filter cutoff EG (0.000 - 60.000s).
359     bool EG2InfiniteSustain; ///< If <i>true</i>, instead of going into Decay2 phase, Decay1 level will be hold until note will be released.
360     uint16_t EG2Sustain; ///< Sustain value of the filter cutoff EG (0 - 1000 permille).
361     double EG2Release; ///< Release time of the filter cutoff EG (0.000 - 60.000s).
362     eg2_ctrl_t EG2Controller; ///< MIDI Controller which has influence on filter cutoff EG parameters (attack, decay, release).
363     bool EG2ControllerInvert; ///< Invert values coming from defined EG2 controller.
364 schoenebeck 36 uint8_t EG2ControllerAttackInfluence; ///< Amount EG2 Controller has influence on the EG2 Attack time (0 - 3, where 0 means off).
365     uint8_t EG2ControllerDecayInfluence; ///< Amount EG2 Controller has influence on the EG2 Decay time (0 - 3, where 0 means off).
366     uint8_t EG2ControllerReleaseInfluence; ///< Amount EG2 Controller has influence on the EG2 Release time (0 - 3, where 0 means off).
367 schoenebeck 2 double LFO2Frequency; ///< Frequency of the filter cutoff LFO (0.10 - 10.00 Hz).
368     uint16_t LFO2InternalDepth; ///< Firm pitch of the filter cutoff LFO (0 - 1200 cents).
369     uint16_t LFO2ControlDepth; ///< Controller depth influencing filter cutoff LFO pitch (0 - 1200).
370     lfo2_ctrl_t LFO2Controller; ///< MIDI Controlle which controls the filter cutoff LFO.
371     bool LFO2FlipPhase; ///< Inverts phase of the filter cutoff LFO wave.
372     bool LFO2Sync; ///< If set to <i>true</i> only one LFO should be used for all voices.
373     // Sample Pitch EG/LFO
374     double EG3Attack; ///< Attack time of the sample pitch EG (0.000 - 10.000s).
375     int16_t EG3Depth; ///< Depth of the sample pitch EG (-1200 - +1200).
376     double LFO3Frequency; ///< Frequency of the sample pitch LFO (0.10 - 10.00 Hz).
377     int16_t LFO3InternalDepth; ///< Firm depth of the sample pitch LFO (-1200 - +1200 cents).
378     int16_t LFO3ControlDepth; ///< Controller depth of the sample pitch LFO (-1200 - +1200 cents).
379     lfo3_ctrl_t LFO3Controller; ///< MIDI Controller which controls the sample pitch LFO.
380     bool LFO3Sync; ///< If set to <i>true</i> only one LFO should be used for all voices.
381     // Filter
382     bool VCFEnabled; ///< If filter should be used.
383     vcf_type_t VCFType; ///< Defines the general filter characteristic (lowpass, highpass, bandpass, etc.).
384     vcf_cutoff_ctrl_t VCFCutoffController; ///< Specifies which external controller has influence on the filter cutoff frequency.
385     uint8_t VCFCutoff; ///< Max. cutoff frequency.
386     curve_type_t VCFVelocityCurve; ///< Defines a transformation curve for the incoming velocity values, affecting the VCF.
387     uint8_t VCFVelocityScale; ///< (0-127) Amount velocity controls VCF cutoff frequency (only if no other VCF cutoff controller is defined).
388     uint8_t VCFVelocityDynamicRange; ///< 0x04 = lowest, 0x00 = highest
389     uint8_t VCFResonance; ///< Firm internal filter resonance weight.
390     bool VCFResonanceDynamic; ///< If <i>true</i>: Increases the resonance Q according to changes of controllers that actually control the VCF cutoff frequency (EG2, ext. VCF MIDI controller).
391     vcf_res_ctrl_t VCFResonanceController; ///< Specifies which external controller has influence on the filter resonance Q.
392     bool VCFKeyboardTracking; ///< If <i>true</i>: VCF cutoff frequence will be dependend to the note key position relative to the defined breakpoint value.
393     uint8_t VCFKeyboardTrackingBreakpoint; ///< See VCFKeyboardTracking (0 - 127).
394     // Key Velocity Transformations
395 schoenebeck 231 curve_type_t VelocityResponseCurve; ///< Defines a transformation curve to the incoming velocity values affecting amplitude (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead).
396     uint8_t VelocityResponseDepth; ///< Dynamic range of velocity affecting amplitude (0 - 4) (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead).
397     uint8_t VelocityResponseCurveScaling; ///< 0 - 127 (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead)
398 schoenebeck 2 curve_type_t ReleaseVelocityResponseCurve; ///< Defines a transformation curve to the incoming release veloctiy values affecting envelope times.
399     uint8_t ReleaseVelocityResponseDepth; ///< Dynamic range of release velocity affecting envelope time (0 - 4).
400     uint8_t ReleaseTriggerDecay; ///< 0 - 8
401     // Mix / Layer
402     crossfade_t Crossfade;
403     bool PitchTrack; ///< If <i>true</i>: sample will be pitched according to the key position (this will be disabled for drums for example).
404     dim_bypass_ctrl_t DimensionBypass; ///< If defined, the MIDI controller can switch on/off the dimension in realtime.
405     int8_t Pan; ///< Panorama / Balance (-64..0..63 <-> left..middle..right)
406     bool SelfMask; ///< If <i>true</i>: high velocity notes will stop low velocity notes at the same note, with that you can save voices that wouldn't be audible anyway.
407 schoenebeck 36 attenuation_ctrl_t AttenuationController; ///< MIDI Controller which has influence on the volume level of the sample (or entire sample group).
408     bool InvertAttenuationController; ///< Inverts the values coming from the defined Attenuation Controller.
409     uint8_t AttenuationControllerThreshold;///< 0-127
410 schoenebeck 2 uint8_t ChannelOffset; ///< Audio output where the audio signal of the dimension region should be routed to (0 - 9).
411     bool SustainDefeat; ///< If <i>true</i>: Sustain pedal will not hold a note.
412     bool MSDecode; ///< Gigastudio flag: defines if Mid Side Recordings should be decoded.
413     uint16_t SampleStartOffset; ///< Number of samples the sample start should be moved (0 - 2000).
414 persson 406 double SampleAttenuation; ///< Sample volume (calculated from DLS::Sampler::Gain)
415    
416 schoenebeck 2 // derived attributes from DLS::Sampler
417     DLS::Sampler::UnityNote;
418     DLS::Sampler::FineTune;
419     DLS::Sampler::Gain;
420     DLS::Sampler::SampleLoops;
421     DLS::Sampler::pSampleLoops;
422    
423 schoenebeck 16 // Methods
424     double GetVelocityAttenuation(uint8_t MIDIKeyVelocity);
425     protected:
426 schoenebeck 2 DimensionRegion(RIFF::List* _3ewl);
427 schoenebeck 16 ~DimensionRegion();
428     friend class Region;
429     private:
430 schoenebeck 36 typedef enum { ///< Used to decode attenuation, EG1 and EG2 controller
431     _lev_ctrl_none = 0x00,
432     _lev_ctrl_modwheel = 0x03, ///< Modulation Wheel (MIDI Controller 1)
433     _lev_ctrl_breath = 0x05, ///< Breath Controller (Coarse, MIDI Controller 2)
434     _lev_ctrl_foot = 0x07, ///< Foot Pedal (Coarse, MIDI Controller 4)
435     _lev_ctrl_effect1 = 0x0d, ///< Effect Controller 1 (Coarse, MIDI Controller 12)
436     _lev_ctrl_effect2 = 0x0f, ///< Effect Controller 2 (Coarse, MIDI Controller 13)
437     _lev_ctrl_genpurpose1 = 0x11, ///< General Purpose Controller 1 (Slider, MIDI Controller 16)
438     _lev_ctrl_genpurpose2 = 0x13, ///< General Purpose Controller 2 (Slider, MIDI Controller 17)
439     _lev_ctrl_genpurpose3 = 0x15, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)
440     _lev_ctrl_genpurpose4 = 0x17, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)
441     _lev_ctrl_portamentotime = 0x0b, ///< Portamento Time (Coarse, MIDI Controller 5)
442     _lev_ctrl_sustainpedal = 0x01, ///< Sustain Pedal (MIDI Controller 64)
443     _lev_ctrl_portamento = 0x19, ///< Portamento (MIDI Controller 65)
444     _lev_ctrl_sostenutopedal = 0x1b, ///< Sostenuto Pedal (MIDI Controller 66)
445     _lev_ctrl_softpedal = 0x09, ///< Soft Pedal (MIDI Controller 67)
446     _lev_ctrl_genpurpose5 = 0x1d, ///< General Purpose Controller 5 (Button, MIDI Controller 80)
447     _lev_ctrl_genpurpose6 = 0x1f, ///< General Purpose Controller 6 (Button, MIDI Controller 81)
448     _lev_ctrl_genpurpose7 = 0x21, ///< General Purpose Controller 7 (Button, MIDI Controller 82)
449     _lev_ctrl_genpurpose8 = 0x23, ///< General Purpose Controller 8 (Button, MIDI Controller 83)
450     _lev_ctrl_effect1depth = 0x25, ///< Effect 1 Depth (MIDI Controller 91)
451     _lev_ctrl_effect2depth = 0x27, ///< Effect 2 Depth (MIDI Controller 92)
452     _lev_ctrl_effect3depth = 0x29, ///< Effect 3 Depth (MIDI Controller 93)
453     _lev_ctrl_effect4depth = 0x2b, ///< Effect 4 Depth (MIDI Controller 94)
454     _lev_ctrl_effect5depth = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)
455     _lev_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure
456     _lev_ctrl_velocity = 0xff ///< Key Velocity
457 schoenebeck 55 } _lev_ctrl_t;
458 schoenebeck 16 typedef std::map<uint32_t, double*> VelocityTableMap;
459    
460     static uint Instances; ///< Number of DimensionRegion instances.
461     static VelocityTableMap* pVelocityTables; ///< Contains the tables corresponding to the various velocity parameters (VelocityResponseCurve and VelocityResponseDepth).
462     double* pVelocityAttenuationTable; ///< Points to the velocity table corresponding to the velocity parameters of this DimensionRegion.
463 schoenebeck 55
464 schoenebeck 36 leverage_ctrl_t DecodeLeverageController(_lev_ctrl_t EncodedController);
465 schoenebeck 308 double* CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling);
466 schoenebeck 2 };
467    
468     /** Encapsulates sample waves used for playback. */
469     class Sample : public DLS::Sample {
470     public:
471     uint16_t SampleGroup;
472     uint32_t Manufacturer; ///< Specifies the MIDI Manufacturer's Association (MMA) Manufacturer code for the sampler intended to receive this file's waveform. If no particular manufacturer is to be specified, a value of 0 should be used.
473     uint32_t Product; ///< Specifies the MIDI model ID defined by the manufacturer corresponding to the Manufacturer field. If no particular manufacturer's product is to be specified, a value of 0 should be used.
474     uint32_t SamplePeriod; ///< Specifies the duration of time that passes during the playback of one sample in nanoseconds (normally equal to 1 / Samplers Per Second, where Samples Per Second is the value found in the format chunk).
475     uint32_t MIDIUnityNote; ///< Specifies the musical note at which the sample will be played at it's original sample rate.
476 schoenebeck 21 uint32_t FineTune; ///< Specifies the fraction of a semitone up from the specified MIDI unity note field. A value of 0x80000000 means 1/2 semitone (50 cents) and a value of 0x00000000 means no fine tuning between semitones.
477 schoenebeck 2 smpte_format_t SMPTEFormat; ///< Specifies the Society of Motion Pictures and Television E time format used in the following <i>SMPTEOffset</i> field. If a value of 0 is set, <i>SMPTEOffset</i> should also be set to 0.
478     uint32_t SMPTEOffset; ///< The SMPTE Offset value specifies the time offset to be used for the synchronization / calibration to the first sample in the waveform. This value uses a format of 0xhhmmssff where hh is a signed value that specifies the number of hours (-23 to 23), mm is an unsigned value that specifies the number of minutes (0 to 59), ss is an unsigned value that specifies the number of seconds (0 to 59) and ff is an unsigned value that specifies the number of frames (0 to -1).
479     uint32_t Loops; ///< Number of defined sample loops (so far only seen single loops in gig files - please report me if you encounter more!).
480 schoenebeck 21 uint32_t LoopID; ///< Specifies the unique ID that corresponds to one of the defined cue points in the cue point list (only if Loops > 0), as the Gigasampler format only allows one loop definition at the moment, this attribute isn't really useful for anything.
481 schoenebeck 2 loop_type_t LoopType; ///< The type field defines how the waveform samples will be looped (only if Loops > 0).
482 schoenebeck 21 uint32_t LoopStart; ///< The start value specifies the offset (in sample points) in the waveform data of the first sample to be played in the loop (only if Loops > 0).
483     uint32_t LoopEnd; ///< The end value specifies the offset (in sample points) in the waveform data which represents the end of the loop (only if Loops > 0).
484     uint32_t LoopSize; ///< Length of the looping area (in sample points) which is equivalent to <i>LoopEnd - LoopStart</i>.
485 schoenebeck 2 uint32_t LoopFraction; ///< The fractional value specifies a fraction of a sample at which to loop (only if Loops > 0). This allows a loop to be fine tuned at a resolution greater than one sample. A value of 0 means no fraction, a value of 0x80000000 means 1/2 of a sample length. 0xFFFFFFFF is the smallest fraction of a sample that can be represented.
486     uint32_t LoopPlayCount; ///< Number of times the loop should be played (only if Loops > 0, a value of 0 = infinite).
487     bool Compressed; ///< If the sample wave is compressed (probably just interesting for instrument and sample editors, as this library already handles the decompression in it's sample access methods anyway).
488 persson 437 uint32_t TruncatedBits; ///< For 24-bit compressed samples only: number of bits truncated during compression (0, 4 or 6)
489     bool Dithered; ///< For 24-bit compressed samples only: if dithering was used during compression with bit reduction
490 schoenebeck 2
491     // own methods
492     buffer_t LoadSampleData();
493     buffer_t LoadSampleData(unsigned long SampleCount);
494     buffer_t LoadSampleDataWithNullSamplesExtension(uint NullSamplesCount);
495     buffer_t LoadSampleDataWithNullSamplesExtension(unsigned long SampleCount, uint NullSamplesCount);
496     buffer_t GetCache();
497 schoenebeck 384 // own static methods
498     static buffer_t CreateDecompressionBuffer(unsigned long MaxReadSize);
499     static void DestroyDecompressionBuffer(buffer_t& DecompressionBuffer);
500 schoenebeck 2 // overridden methods
501     void ReleaseSampleData();
502     unsigned long SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence = RIFF::stream_start);
503     unsigned long GetPos();
504 schoenebeck 384 unsigned long Read(void* pBuffer, unsigned long SampleCount, buffer_t* pExternalDecompressionBuffer = NULL);
505     unsigned long ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState, buffer_t* pExternalDecompressionBuffer = NULL);
506 schoenebeck 2 protected:
507     static unsigned int Instances; ///< Number of instances of class Sample.
508 schoenebeck 384 static buffer_t InternalDecompressionBuffer; ///< Buffer used for decompression as well as for truncation of 24 Bit -> 16 Bit samples.
509 schoenebeck 2 unsigned long FrameOffset; ///< Current offset (sample points) in current sample frame (for decompression only).
510     unsigned long* FrameTable; ///< For positioning within compressed samples only: stores the offset values for each frame.
511     unsigned long SamplePos; ///< For compressed samples only: stores the current position (in sample points).
512 persson 365 unsigned long SamplesInLastFrame; ///< For compressed samples only: length of the last sample frame.
513     unsigned long WorstCaseFrameSize; ///< For compressed samples only: size (in bytes) of the largest possible sample frame.
514     unsigned long SamplesPerFrame; ///< For compressed samples only: number of samples in a full sample frame.
515 schoenebeck 2 buffer_t RAMCache; ///< Buffers samples (already uncompressed) in RAM.
516    
517     Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset);
518     ~Sample();
519 schoenebeck 24 /**
520     * Swaps the order of the data words in the given memory area
521     * with a granularity given by \a WordSize.
522     *
523     * @param pData - pointer to the memory area to be swapped
524     * @param AreaSize - size of the memory area to be swapped (in bytes)
525     * @param WordSize - size of the data words (in bytes)
526     */
527     inline void SwapMemoryArea(void* pData, unsigned long AreaSize, uint WordSize) {
528     switch (WordSize) { // TODO: unefficient
529     case 1: {
530     uint8_t* pDst = (uint8_t*) pData;
531     uint8_t cache;
532     unsigned long lo = 0, hi = AreaSize - 1;
533     for (; lo < hi; hi--, lo++) {
534     cache = pDst[lo];
535     pDst[lo] = pDst[hi];
536     pDst[hi] = cache;
537     }
538     break;
539     }
540     case 2: {
541     uint16_t* pDst = (uint16_t*) pData;
542     uint16_t cache;
543     unsigned long lo = 0, hi = (AreaSize >> 1) - 1;
544     for (; lo < hi; hi--, lo++) {
545     cache = pDst[lo];
546     pDst[lo] = pDst[hi];
547     pDst[hi] = cache;
548     }
549     break;
550     }
551     case 4: {
552     uint32_t* pDst = (uint32_t*) pData;
553     uint32_t cache;
554     unsigned long lo = 0, hi = (AreaSize >> 2) - 1;
555     for (; lo < hi; hi--, lo++) {
556     cache = pDst[lo];
557     pDst[lo] = pDst[hi];
558     pDst[hi] = cache;
559     }
560     break;
561     }
562     default: {
563     uint8_t* pCache = new uint8_t[WordSize]; // TODO: unefficient
564     unsigned long lo = 0, hi = AreaSize - WordSize;
565     for (; lo < hi; hi -= WordSize, lo += WordSize) {
566     memcpy(pCache, (uint8_t*) pData + lo, WordSize);
567     memcpy((uint8_t*) pData + lo, (uint8_t*) pData + hi, WordSize);
568     memcpy((uint8_t*) pData + hi, pCache, WordSize);
569     }
570     delete[] pCache;
571     break;
572     }
573     }
574     }
575     inline long Min(long A, long B) {
576     return (A > B) ? B : A;
577     }
578     inline long Abs(long val) { return (val > 0) ? val : -val; }
579 persson 365
580     // Guess size (in bytes) of a compressed sample
581     inline unsigned long GuessSize(unsigned long samples) {
582     // 16 bit: assume all frames are compressed - 1 byte
583     // per sample and 5 bytes header per 2048 samples
584    
585     // 24 bit: assume next best compression rate - 1.5
586     // bytes per sample and 13 bytes header per 256
587     // samples
588     const unsigned long size =
589     BitDepth == 24 ? samples + (samples >> 1) + (samples >> 8) * 13
590     : samples + (samples >> 10) * 5;
591     // Double for stereo and add one worst case sample
592     // frame
593     return (Channels == 2 ? size << 1 : size) + WorstCaseFrameSize;
594     }
595 schoenebeck 384
596     // Worst case amount of sample points that can be read with the
597     // given decompression buffer.
598     inline unsigned long WorstCaseMaxSamples(buffer_t* pDecompressionBuffer) {
599     return (unsigned long) ((float)pDecompressionBuffer->Size / (float)WorstCaseFrameSize * (float)SamplesPerFrame);
600     }
601 schoenebeck 2 private:
602     void ScanCompressedSample();
603     friend class File;
604     friend class Region;
605     };
606    
607     // TODO: <3dnl> list not used yet - not important though (just contains optional descriptions for the dimensions)
608     /** Defines <i>Region</i> information of an <i>Instrument</i>. */
609     class Region : public DLS::Region {
610     public:
611     unsigned int Dimensions; ///< Number of defined dimensions.
612 schoenebeck 347 dimension_def_t pDimensionDefinitions[8]; ///< Defines the five (gig2) or eight (gig3) possible dimensions (the dimension's controller and number of bits/splits).
613 schoenebeck 2 uint32_t DimensionRegions; ///< Total number of DimensionRegions this Region contains.
614 schoenebeck 347 DimensionRegion* pDimensionRegions[256]; ///< Pointer array to the 32 (gig2) or 256 (gig3) possible dimension regions (reflects NULL for dimension regions not in use). Avoid to access the array directly and better use GetDimensionRegionByValue() instead, but of course in some cases it makes sense to use the array (e.g. iterating through all DimensionRegions).
615 schoenebeck 282 unsigned int Layers; ///< Amount of defined layers (1 - 32). A value of 1 actually means no layering, a value > 1 means there is Layer dimension. The same information can of course also be obtained by accessing pDimensionDefinitions.
616 schoenebeck 2
617 schoenebeck 347 DimensionRegion* GetDimensionRegionByValue(const uint DimValues[8]);
618     DimensionRegion* GetDimensionRegionByBit(const uint8_t DimBits[8]);
619 schoenebeck 2 Sample* GetSample();
620     protected:
621     uint8_t VelocityTable[128]; ///< For velocity dimensions with custom defined zone ranges only: used for fast converting from velocity MIDI value to dimension bit number.
622    
623     Region(Instrument* pInstrument, RIFF::List* rgnList);
624     void LoadDimensionRegions(RIFF::List* rgn);
625     Sample* GetSampleFromWavePool(unsigned int WavePoolTableIndex);
626     ~Region();
627     friend class Instrument;
628     };
629    
630     /** Provides all neccessary information for the synthesis of an <i>Instrument</i>. */
631     class Instrument : protected DLS::Instrument {
632     public:
633     // derived attributes from DLS::Resource
634     DLS::Resource::pInfo;
635     DLS::Resource::pDLSID;
636     // derived attributes from DLS::Instrument
637     DLS::Instrument::IsDrum;
638     DLS::Instrument::MIDIBank;
639     DLS::Instrument::MIDIBankCoarse;
640     DLS::Instrument::MIDIBankFine;
641     DLS::Instrument::MIDIProgram;
642     DLS::Instrument::Regions;
643     // own attributes
644     int32_t Attenuation; ///< in dB
645     uint16_t EffectSend;
646     int16_t FineTune; ///< in cents
647     uint16_t PitchbendRange; ///< Number of semitones pitchbend controller can pitch (default is 2).
648     bool PianoReleaseMode;
649     range_t DimensionKeyRange; ///< 0-127 (where 0 means C1 and 127 means G9)
650    
651    
652     // derived methods from DLS::Resource
653     DLS::Resource::GetParent;
654     // overridden methods
655     Region* GetFirstRegion();
656     Region* GetNextRegion();
657     // own methods
658     Region* GetRegion(unsigned int Key);
659     protected:
660     Region** pRegions; ///< Pointer array to the regions
661     Region* RegionKeyTable[128]; ///< fast lookup for the corresponding Region of a MIDI key
662     int RegionIndex;
663    
664     Instrument(File* pFile, RIFF::List* insList);
665     ~Instrument();
666     friend class File;
667     };
668    
669     // TODO: <3gnm> chunk not added yet (just contains the names of the sample groups)
670     /** Parses Gigasampler files and provides abstract access to the data. */
671     class File : protected DLS::File {
672     public:
673     // derived attributes from DLS::Resource
674     DLS::Resource::pInfo;
675     DLS::Resource::pDLSID;
676     // derived attributes from DLS::File
677     DLS::File::pVersion;
678     DLS::File::Instruments;
679    
680     // derived methods from DLS::Resource
681     DLS::Resource::GetParent;
682     // overridden methods
683     File(RIFF::File* pRIFF);
684     Sample* GetFirstSample(); ///< Returns a pointer to the first <i>Sample</i> object of the file, <i>NULL</i> otherwise.
685     Sample* GetNextSample(); ///< Returns a pointer to the next <i>Sample</i> object of the file, <i>NULL</i> otherwise.
686     Instrument* GetFirstInstrument(); ///< Returns a pointer to the first <i>Instrument</i> object of the file, <i>NULL</i> otherwise.
687     Instrument* GetNextInstrument(); ///< Returns a pointer to the next <i>Instrument</i> object of the file, <i>NULL</i> otherwise.
688 schoenebeck 21 Instrument* GetInstrument(uint index);
689 schoenebeck 350 ~File();
690 schoenebeck 2 protected:
691     typedef std::list<Sample*> SampleList;
692     typedef std::list<Instrument*> InstrumentList;
693    
694     SampleList* pSamples;
695     SampleList::iterator SamplesIterator;
696     InstrumentList* pInstruments;
697     InstrumentList::iterator InstrumentsIterator;
698    
699     void LoadSamples();
700     void LoadInstruments();
701     friend class Region;
702     };
703    
704     /** Will be thrown whenever a gig specific error occurs while trying to access a Gigasampler File. */
705     class Exception : public DLS::Exception {
706     public:
707     Exception(String Message);
708     void PrintMessage();
709     };
710    
711     } // namespace gig
712    
713     #endif // __GIG_H__
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