20 #ifndef __JackFilters__
21 #define __JackFilters__
24 #include <TargetConditionals.h>
28 #ifndef MY_TARGET_OS_IPHONE
29 #include "JackAtomicState.h"
37 #ifndef TARGET_OS_IPHONE
45 jack_time_t fTable[MAX_SIZE];
49 for (
int i = 0; i < MAX_SIZE; i++)
53 void AddValue(jack_time_t val)
55 memcpy(&fTable[1], &fTable[0],
sizeof(jack_time_t) * (MAX_SIZE - 1));
62 for (
int i = 0; i < MAX_SIZE; i++)
64 return mean / MAX_SIZE;
67 } POST_PACKED_STRUCTURE;
75 jack_nframes_t fFrames;
76 jack_time_t fCurrentWakeup;
77 jack_time_t fCurrentCallback;
78 jack_time_t fNextWakeUp;
79 float fSecondOrderIntegrator;
80 jack_nframes_t fBufferSize;
81 jack_nframes_t fSampleRate;
82 jack_time_t fPeriodUsecs;
83 float fFilterCoefficient;
93 Init(buffer_size, sample_rate);
96 void Init(jack_nframes_t buffer_size, jack_nframes_t sample_rate)
100 fCurrentCallback = 0;
102 fFilterCoefficient = 0.01f;
103 fSecondOrderIntegrator = 0.0f;
104 fBufferSize = buffer_size;
105 fSampleRate = sample_rate;
106 fPeriodUsecs = jack_time_t(1000000.f / fSampleRate * fBufferSize);
109 void Init(jack_time_t callback_usecs)
113 fSecondOrderIntegrator = 0.0f;
114 fCurrentCallback = callback_usecs;
115 fNextWakeUp = callback_usecs + fPeriodUsecs;
118 void IncFrame(jack_time_t callback_usecs)
120 float delta = (int64_t)callback_usecs - (int64_t)fNextWakeUp;
121 fCurrentWakeup = fNextWakeUp;
122 fCurrentCallback = callback_usecs;
123 fFrames += fBufferSize;
124 fSecondOrderIntegrator += 0.5f * fFilterCoefficient * delta;
125 fNextWakeUp = fCurrentWakeup + fPeriodUsecs + (int64_t) floorf((fFilterCoefficient * (delta + fSecondOrderIntegrator)));
128 jack_nframes_t Time2Frames(jack_time_t time)
130 long delta = (long) rint(((
double) ((
long long)(time - fCurrentWakeup)) / ((
long long)(fNextWakeUp - fCurrentWakeup))) * fBufferSize);
131 return (delta < 0) ? ((fFrames > 0) ? fFrames : 1) : (fFrames + delta);
134 jack_time_t Frames2Time(jack_nframes_t frames)
136 long delta = (long) rint(((
double) ((
long long)(frames - fFrames)) * ((
long long)(fNextWakeUp - fCurrentWakeup))) / fBufferSize);
137 return (delta < 0) ? ((fCurrentWakeup > 0) ? fCurrentWakeup : 1) : (fCurrentWakeup + delta);
140 jack_nframes_t CurFrame()
145 jack_time_t CurTime()
147 return fCurrentWakeup;
150 } POST_PACKED_STRUCTURE;
159 fState[0].Init(buffer_size, sample_rate);
160 fState[1].Init(buffer_size, sample_rate);
163 void Init(jack_time_t callback_usecs)
166 dll->Init(callback_usecs);
171 void Init(jack_nframes_t buffer_size, jack_nframes_t sample_rate)
174 dll->Init(buffer_size, sample_rate);
179 void IncFrame(jack_time_t callback_usecs)
182 dll->IncFrame(callback_usecs);
187 jack_nframes_t Time2Frames(jack_time_t time)
194 cur_index = next_index;
197 }
while (cur_index != next_index);
202 jack_time_t Frames2Time(jack_nframes_t frames)
209 cur_index = next_index;
212 }
while (cur_index != next_index);
216 } POST_PACKED_STRUCTURE;
226 double resample_mean;
227 double static_resample_factor;
229 double* offset_array;
230 double* window_array;
231 int offset_differential_index;
233 double offset_integral;
236 double catch_factor2;
241 double hann(
double x)
243 return 0.5 * (1.0 - cos(2 * M_PI * x));
248 resample_mean = resample_factor;
249 static_resample_factor = resample_factor;
250 offset_array =
new double[fir_size];
251 window_array =
new double[fir_size];
252 offset_differential_index = 0;
253 offset_integral = 0.0;
254 smooth_size = fir_size;
256 for (
int i = 0; i < fir_size; i++) {
257 offset_array[i] = 0.0;
258 window_array[i] = hann(
double(i) / (
double(fir_size) - 1.0));
262 catch_factor = 100000;
263 catch_factor2 = 10000;
265 controlquant = 10000.0;
270 delete[] offset_array;
271 delete[] window_array;
274 void Init(
double resample_factor)
276 resample_mean = resample_factor;
277 static_resample_factor = resample_factor;
318 double GetRatio(
int error)
320 double smooth_offset = error;
323 offset_integral += smooth_offset;
328 return static_resample_factor - smooth_offset/catch_factor - offset_integral/catch_factor/catch_factor2;
337 offset_integral = - (resample_mean - static_resample_factor) * catch_factor * catch_factor2;
339 for (i = 0; i < smooth_size; i++) {
340 offset_array[i] = 0.0;
JackDelayLockedLoop * ReadCurrentState()
Returns the current state : only valid in the RT reader thread.
void WriteNextStateStop()
Stop write operation : make the next state ready to be used by the RT thread.
JackDelayLockedLoop * WriteNextStateStart()
Start write operation : setup and returns the next state to update, check for recursive write calls...
UInt16 GetCurrentIndex()
Returns the current state index.
JackDelayLockedLoop * TrySwitchState()
Tries to switch to the next state and returns the new current state (either the same as before if cas...
A class to handle two states (switching from one to the other) in a lock-free manner.