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Awful_audio.cpp
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Awful_audio.cpp
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#include "stdafx.h"
#include "resource.h"
#include "awful.h"
#include "awful_audio.h"
#include "awful_instruments.h"
#include "awful_elements.h"
#include "awful_paramedit.h"
#include "awful_controls.h"
#include "awful_panels.h"
#include "awful_effects.h"
#include "VSTCollection.h"
#include "awful_events_triggers.h"
#include "awful_tracks_lanes.h"
#include "awful_audiohost.h"
#include "awful_renderer.h"
#include "awful_utils_common.h"
#include "awful_preview.h"
#include "awful_cursorandmouse.h"
extern void OutsyncTriggers();
extern void ResetProcessing(bool resetmix);
extern void Place_Note(Instrument *instr, int note, float vol, unsigned long start_frame, unsigned long end_frame);
extern void UpdatePerBaseFrame(Playback* pb);
extern void ProcessSymbols4Gennote(Trigger* tg, long curr_frame, float* freq_active, bool* skip_and_continue, bool* skip);
extern PaError PortAudio_Init();
extern PaError PortAudio_Deinit();
extern PaError PortAudio_Start();
extern void PlayMain();
extern void StopMain(bool forceresetmix);
void MixPreviewData(float* dataL, float* dataR);
bool IsCommandApplicable(Command* cmd, NoteInstance* instr_instance);
extern inline float MixPans(float src_pan, float dst_pan);
inline void GetMonoSampleData(Sample* sample, double cursor_pos, float* dataLR);
inline void GeStereoSampleData(Sample* sample, double cursor_pos, float* dataL, float* dataR);
inline double Sinc(double a);
inline double SincWindowedBlackman(double a, double b, unsigned int num);
inline float Sinc_Interpolate(float* Yi, double dX, unsigned int num);
extern void ResetUnstableElements();
extern void ResetPlacedEnvelopes();
/* Main callback function called by portAudio when it needs to fill sample buffer with next chunk of data */
static int PortAudio_StreamCallback(const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags, void *userData);
/* Function provided to Renderer module as callback filling in sample buffer */
static RNDR_StreamCode Render_Callback(void *sample_buff, unsigned long frameCount);
void CommonAudioCallback(const void* inputBuffer, void* outputBuffer, unsigned long framesPerBuffer);
long curr_frame;
PaStream *Stream; // PortAudio stream
//Parameters of active selected output audio device
PaStreamParameters outputParameters;
//Parameters of active selected input audio device
PaStreamParameters inputParameters;
PaTime CurrentTime = 0;
float databuff[MAX_BUFF_SIZE*2];
// Global mute triggers for antialiasing
bool GlobalMute = false;
bool MixMute = false;
//Sample buffer for sinc interpolation
static float Yi[256];
//==============================================================================
// this wraps the actual audio device
CAudioDeviceManager* audioDeviceManager = NULL;
AudioCallback* audioCallBack = NULL;
AwfulMidiInputCallback* midiCallBack = NULL;
void AudioCallback::audioDeviceIOCallback(const float** inputChannelData, int totalNumInputChannels, float** outputChannelData, int totalNumOutputChannels, int numSamples)
{
//Random rnd(1);
if(totalNumOutputChannels == 2)
{
CommonAudioCallback(NULL, databuff, numSamples);
for(int fc = 0; fc < numSamples; fc++)
{
outputChannelData[0][fc] = databuff[fc*2];
outputChannelData[1][fc] = databuff[fc*2 + 1];
/*
if(Playing)
{
outputChannelData[0][fc] = rnd.nextFloat();
outputChannelData[1][fc] = rnd.nextFloat();
}
else
{
outputChannelData[0][fc] = 0;
outputChannelData[1][fc] = 0;
}
*/
}
}
}
void AudioCallback::audioDeviceAboutToStart(AudioIODevice * device)
{
}
void AudioCallback::audioDeviceStopped()
{
}
//
///
///////
//////////////
//////////////////
//////////////////
/////////
///////////
//////////////////////////
///////////////////
//////////
////////////8/8/8/8
//////////////*******
/////////////////////// // -9982
///////////////////////////////////
void SetSampleRate(unsigned int uiSampleRate)
{
pVSTCollector->SetSampleRate((float)uiSampleRate);
Eff* eff = first_eff;
while(eff != NULL)
{
eff->SetSampleRate((float)uiSampleRate);
eff = eff->next;
}
Instrument* instr = first_instr;
while(instr != NULL)
{
instr->SetSampleRate((float)uiSampleRate);
instr = instr->next;
}
}
void SetBPM(float bpm)
{
if (pVSTCollector != NULL)
{
pVSTCollector->SetBPM(bpm);
}
}
bool Render_Start()
{
long ullLastFrame;
GetLastElementEndFrame(&ullLastFrame);
if(ullLastFrame > 0 && Playing == false)
{
if(Rendering == false)
{
CP->PosToHome();
#ifdef USE_JUCE_AUDIO
audioDeviceManager->removeAudioCallback(audioCallBack);
#else
PortAudio_Stop();
#endif
PlayMain();
Rendering = true;
pRenderer->SetConfig(&renderConfig);
pRenderer->SetAudioLength(ullLastFrame);
pRenderer->Open();
pRenderer->Start(&Render_Callback);
}
else
{
pbkMain->UpdateQueuedEv();
pRenderer->SetAudioLength(ullLastFrame);
pRenderer->Resume();
}
return true;
}
else
return false;
}
void Render_Stop()
{
if (Rendering == true)
{
Rendering = false;
pRenderer->Stop();
pRenderer->Close();
#ifdef USE_JUCE_AUDIO
audioDeviceManager->addAudioCallback(audioCallBack);
#else
PortAudio_Start();
#endif
}
StopMain();
}
// Resets parameters being recorded to envelopes
void FinishParamsRecording()
{
if(Recording == true)
{
Parameter* paramnext;
Parameter* param = first_rec_param;
while(param != NULL)
{
paramnext = param->rec_next;
param->FinishRecording();
param = paramnext;
}
}
}
// Completely stops params recording
void StopRecording()
{
FinishParamsRecording();
Recording = false;
CP->Record->Release();
}
void PlayMain()
{
if(Playing == false) // Go playing
{
// "Playing selected"
if(pbkMain->looped == true)
{
if(pbkMain->currFrame < pbkMain->rng_start_frame || pbkMain->currFrame > pbkMain->rng_end_frame)
{
pbkMain->SetCurrFrame(pbkMain->rng_start_frame);
UpdatePerBaseFrame(pbkMain);
}
}
pbkMain->UpdateQueuedEv();
pbkMain->SetActive();
if(aux_panel->workPt->basePattern->autopatt == false)
{
pbkAux->SetInactive();
}
// Seamless envelopes support
PreInitEnvelopes(pbkMain->currFrame, field_pattern, field_pattern->first_ev, true);
PreInitSamples(pbkMain->currFrame, field_pattern, field_pattern->first_ev);
Playing = true;
}
else // Pause playing
{
Playing = false;
if(Recording == true)
{
FinishParamsRecording();
}
MC->poso->stopTimer();
pbkMain->SetInactive();
pbkAux->SetInactive();
// Align current frame to the last *seen* pos, not the last played.
pbkMain->SetCurrFrame((long)pbkMain->currFrame_tsync);
if(aux_panel->workPt->basePattern->autopatt == false)
{
pbkAux->SetCurrFrame((long)pbkAux->currFrame_tsync);
}
ResetProcessing(false);
ResetUnstableElements();
CleanupAll();
}
}
void StopMain(bool forceresetmix)
{
bool resetmix = forceresetmix;
if(resetmix == false && Playing == false && aux_panel->playing == false)
{
resetmix = true;
}
if(Playing == true || !aux_panel->isPlaying())
{
Playing = false;
MC->poso->stopTimer();
pbkMain->pactive = false;
pbkMain->SetCurrFrame(0);
currPlayX = 0;
currPlayX_f = 0;
if(Recording == true)
{
StopRecording();
}
Preview_StopAll();
ResetProcessing(resetmix);
CleanupAll();
UpdateTime(Loc_MainGrid);
AuxPos2MainPos();
}
else if(aux_panel->isPlaying())
{
aux_panel->Stop();
}
// Seamless envelopes support
PreInitEnvelopes(pbkMain->currFrame, field_pattern, field_pattern->first_ev, true);
}
void ResetPlacedEnvelopes()
{
Command* cmd;
Trigger* tg = first_active_command_trigger;
while(tg != NULL)
{
cmd = (Command*)tg->el;
if(cmd->cmdtype != Cmd_LocVolEnv && cmd->cmdtype != Cmd_LocPanEnv)
{
tg->Deactivate();
}
tg = tg->loc_act_next;
}
}
// This function takes care of elements that can produce undesired effects per position change
void ResetUnstableElements()
{
// Remove active effect-elements
Trigger* tg = first_global_active_trigger;
Trigger* tgnext;
while(tg != NULL)
{
tgnext = tg->act_next;
if(((tg->el->type == El_GenNote) && ((NoteInstance*)tg->el)->instr->subtype == ModSubtype_VSTPlugin)||
tg->el->type == El_Mute ||
tg->el->type == El_Vibrate ||
tg->el->type == El_Slider ||
tg->el->type == El_Transpose ||
tg->el->type == El_SlideNote ||
tg->el->type == El_Command) // Envelopes will be preinited when playback restarts
{
tg->toberemoved = true;
}
tg = tgnext;
}
// Block instance triggers to prevent unneeded effects
OutsyncTriggers();
}
void OutsyncTriggers()
{
Trigger* tg = first_global_active_trigger;
Trigger* tgnext;
while(tg != NULL)
{
tgnext = tg->act_next;
if(tg->el->IsInstance())
{
tg->outsync = true;
}
tg = tgnext;
}
}
void ResetProcessing(bool resetmix)
{
GlobalMute = true;
if(resetmix)
{
MixMute = true;
field_pattern->Reset();
Trk* trk = first_trkdata;
while(trk != NULL)
{
trk->fxstate.t_break = false;
trk->fxstate.t_reversed = false;
trk->fxstate.t_mutecount = 0;
trk->envelopes = NULL;
trk->fxstate.freqtrig = NULL;
trk->fxstate.t_freq_mult = 1;
trk = trk->next;
}
mAster.efftrig = NULL;
mAster.envelopes = NULL;
mAster.freq_mult = 1;
Instrument* i = first_instr;
while(i != NULL)
{
i->Reset();
i = i->next;
}
}
}
void Place_Note(Instrument *instr, int note, float vol, unsigned long start_frame, unsigned long end_frame)
{
aux_panel->PlaceNote(instr, note, vol, start_frame, end_frame);
}
void MidiToHost_AddNoteOn(Instrument* instr, int note, int vol)
{
float notevol;
if(vol <= 100)
notevol = (float)vol/100;
else
notevol = float(vol - 100)/27.f*(VolRange - 1) + 1;
// Let's handle recording stuff
Pattern* pt = NULL;
if(Recording)
{
if(Playing)
{
pt = field_pattern;
if(!aux_panel->isBlank())
{
pt = aux_panel->workPt;
C.SetPattern(pt, Loc_MainGrid);
}
else if(C.patt == field_pattern)
{
C.SetPos(Frame2Tick(pbkMain->currFrame), CLine);
pt = CreateElement_Pattern(CTick, CTick + (float)ticks_per_beat, CLine, CLine, Patt_Pianoroll);
C.SetPattern(pt, Loc_MainGrid);
// Remove it from field
C.type = CType_None;
R(Refresh_KeyCursor);
MC->ForceRefresh();
}
else
pt = C.patt;
//Place_Note(((Instance*)(PrevSlot[ic].trig.el))->instr,
// note, PrevSlot[ic].trig.vol_val, PrevSlot[ic].start_frame, pbMain->currFrame - pbAux->currFrame);
if(instr->subtype == ModSubtype_Sample)
{
// If this is a sample, then record it immediately, since it's released by itself, without
// waiting for user to release the key on MIDI keyboard
tframe frame1 = pbkMain->currFrame - C.patt->StartFrame();
Grid_PutInstanceSpecific(C.patt,
instr,
note + 1,
notevol,
frame1,
frame1 + 1);
float newlength = Frame2Tick(frame1 + 4444);
if(newlength > C.patt->tick_length)
C.patt->SetTickLength(newlength);
R(Refresh_Grid);
MC->poso->ScheduleRefresh();
//MC->listen->CommonInputActions();
}
}
else if(aux_panel->playing)
{
if(aux_panel->isBlank())
{
aux_panel->CreateNew();
}
pt = aux_panel->workPt;
}
}
// Then preview the note
int num = Preview_Add(NULL, instr, -1, note, pt, NULL, NULL);
// Remember the frame and the volume, to use them after note is released
if(num != 0xFFFF)
{
PrevSlot[num].ii->loc_vol->SetNormalValue(notevol);
PrevSlot[num].start_frame = pbkMain->currFrame;
}
//if(Recording)
//{
// Place_Note(instr, note, vol, pbMain->currFrame, pbMain->currFrame + 44100);
// R(Refresh_AuxGrid);
// MC->listen->CommonInputActions();
//}
}
void MidiToHost_AddNoteOff(Instrument* instr, int note)
{
Preview_Release(instr, note);
}
extern inline float MixPans(float src_pan, float dst_pan)
{
return src_pan*(1 - abs(dst_pan)) + dst_pan;
}
inline bool IsCommandApplicable(Command* cmd, NoteInstance* instance)
{
if(cmd->scope->local == true)
{
if(cmd->patt == instance->patt)
{
if(cmd->scope->instr == instance->instr)
{
return true;
}
}
}
else if(cmd->scope->for_track == true)
{
if(cmd->field_trknum == instance->field_trknum)
{
if(cmd->scope->instr == instance->instr)
{
return true;
}
}
}
else if(cmd->scope->pt != NULL)
{
if(cmd->scope->pt == instance->patt)
{
if(cmd->scope->instr == instance->instr)
{
return true;
}
}
}
else
{
if(cmd->scope->instr == instance->instr)
{
return true;
}
}
return false;
}
void StopPlacedEnvelopes()
{
Trigger* tg = first_active_command_trigger;
while(tg != NULL)
{
if(tg->el->IsPresent())
{
((Envelope*)((Command*)tg->el)->paramedit)->newbuff = false;;
}
tg = tg->loc_act_next;
}
}
void UpdatePerBaseFrame(Playback* pb)
{
if(pb == pbkMain)
{
currPlayX_f = pbkMain->currFrame/framesPerPixel;
currPlayX = (int)currPlayX_f;
AuxPos2MainPos();
}
else if(pb == pbkAux)
{
aux_panel->curr_play_x_f = (pbkAux->currFrame - aux_panel->workPt->frame)/aux_panel->frames_per_pixel;
aux_panel->curr_play_x = (int)aux_panel->curr_play_x_f;
MainPos2AuxPos();
}
}
INLINE float Gaussian_Interpol(float* Yi, float dX)
{
float ret_val = 0;
// double a = -1.0/12.0*Yi[2]-1.0/120.0*Yi[0]+1.0/24.0*Yi[1]+1.0/120.0*Yi[5]+1.0/12.0*Yi[3]-1.0/24.0*Yi[4];
// double b = 13.0/12.0*Yi[2]+1.0/8.0*Yi[0]-7.0/12.0*Yi[1]-1.0/12.0*Yi[5]-Yi[3]+11.0/24.0*Yi[4];
// double c = -59.0/12.0*Yi[2]-17.0/24.0*Yi[0]+71.0/24.0*Yi[1]+7.0/24.0*Yi[5]+49.0/12.0*Yi[3]-41.0/24.0*Yi[4];
// double d = 107.0/12.0*Yi[2]+15.0/8.0*Yi[0]-77.0/12.0*Yi[1]-5.0/12.0*Yi[5]-13.0/2.0*Yi[3]+61.0/24.0*Yi[4];
// double e = -137.0/60.0*Yi[0]+5.0*Yi[1]-5.0*Yi[2]+10.0/3.0*Yi[3]-5.0/4.0*Yi[4]+1.0/5.0*Yi[5];
dX += 2;
//ret_val = ((((a*dX + b)*dX + c)*dX + d)*dX + e)*dX + Yi[0];
ret_val = (float)((((((-1.0/12.0*Yi[2]-1.0/120.0*Yi[0]+1.0/24.0*Yi[1]+1.0/120.0*Yi[5]+1.0/12.0*Yi[3]-1.0/24.0*Yi[4])*dX + \
(13.0/12.0*Yi[2]+1.0/8.0*Yi[0]-7.0/12.0*Yi[1]-1.0/12.0*Yi[5]-Yi[3]+11.0/24.0*Yi[4]))*dX + \
(-59.0/12.0*Yi[2]-17.0/24.0*Yi[0]+71.0/24.0*Yi[1]+7.0/24.0*Yi[5]+49.0/12.0*Yi[3]-41.0/24.0*Yi[4]))*dX + \
(107.0/12.0*Yi[2]+15.0/8.0*Yi[0]-77.0/12.0*Yi[1]-5.0/12.0*Yi[5]-13.0/2.0*Yi[3]+61.0/24.0*Yi[4]))*dX + \
(-137.0/60.0*Yi[0]+5.0*Yi[1]-5.0*Yi[2]+10.0/3.0*Yi[3]-5.0/4.0*Yi[4]+1.0/5.0*Yi[5]))*dX + Yi[0]);
return ret_val;
}
INLINE float Sinc_Interpolate(float* Yi, double dX, unsigned int num)
{
double ret_val = 0;
unsigned char mid = num/2;
int j = (int)(0 - mid);
unsigned int i = 0;
for (; i < num; ++i)
{
ret_val += Yi[i]*SincWindowedBlackman((double)(j - dX), (double) (i - dX), num);
++j;
}
return (float)ret_val;
}
INLINE double Sinc(double a)
{
return sin(PI*a)/(PI*a);
}
INLINE double SincWindowedBlackman(double a, double b, unsigned int num)
{
return Sinc(a)*(0.42 - 0.5*cos((2.f*PI*b)/((float)num)) + 0.08*cos((4.f*PI*b)/((float)num)));
}
INLINE void GetMonoSampleData(Sample* sample, double cursor_pos, float* dataLR)
{
float x1 = (float)(int)cursor_pos;
float x2 = x1 + 1;
float y1 = sample->sample_data[(int)x1];
float y2;
float Y[6];
if((int)x2 == sample->sample_info.frames)
{
y2 = 0;
}
else
{
y2 = sample->sample_data[(int)x2];
}
double x3 = cursor_pos;
if (x1 == x3)
{
*dataLR = sample->sample_data[(int)x3];
}
else
{
unsigned int method = WorkingInterpolationMethod;
if(Rendering == true)
method = RenderInterpolationMethod;
switch (method)
{
case Interpol_linear:
{
*dataLR = Interpolate_Line(x1, y1, x2, y2, x3);
}
break;
case Interpol_3dHermit:
{
float dX = (float)cursor_pos - x1;
float xm1 = x1 > 0 ? sample->sample_data[(int)(x1-1)] : 0;
float _x0 = sample->sample_data[(int)x1];
float _x1 = (x1+1) <= (sample->sample_info.frames -1) ? sample->sample_data[(int)(x1 + 1)] : sample->sample_data[(int)x1];
float _x2 = (x1+2) <= (sample->sample_info.frames -1) ? sample->sample_data[(int)(x1 + 2)] : sample->sample_data[(int)x1];
// float a = (3 * (_x0-_x1) - xm1 + _x2) / 2;
// float b = 2*_x1 + xm1 - (5*_x0 + _x2) / 2;
// float c = (_x1 - xm1) / 2;
*dataLR = (((((3 * (_x0-_x1) - xm1 + _x2) / 2) * dX) +\
(2*_x1 + xm1 - (5*_x0 + _x2) / 2)) * dX + ((_x1 - xm1) / 2)) * dX + _x0;
}
break;
case Interpol_6dHermit:
{
float dX = (float)cursor_pos - x1;
int i = 0;
unsigned int pX = (x1 > 1)? (unsigned int)x1-2: 0;
for (i = 0; i<6;++i)
{
if ((pX + i)< (sample->sample_info.frames -1))
{
Y[i] = sample->sample_data[(int)pX+i];
}
else
{
Y[i] = 0;
}
}
*dataLR = Gaussian_Interpol(Y, dX);
}
break;
case Interpol_64Sinc:
case Interpol_128Sinc:
case Interpol_256Sinc:
{
double dX = cursor_pos - x1;
unsigned int num = 64;
if (method == Interpol_128Sinc)
{
num = 128;
}
else if (method == Interpol_256Sinc)
{
num = 256;
}
int uiLBorder;
uiLBorder = int(x1 - num/2);
for (unsigned int i = 0; i < num; ++i)
{
if (((uiLBorder + i) >= 0) && ((uiLBorder + i) < sample->sample_info.frames))
{
Yi[i] = sample->sample_data[(int)(uiLBorder + i)];
}
else
{
Yi[i] = 0;
}
}
*dataLR = Sinc_Interpolate(Yi, dX, num);
}
break;
default:
{
}
break;
}
}
}
INLINE void GeStereoSampleData(Sample* sample, double cursor_pos, float* dataL, float* dataR)
{
double x1, x2, x3;
float y1, y2;
float Y[6];
// process left
x1 = (float)((int)cursor_pos);
x2 = x1 + 1;
x3 = cursor_pos;
y1 = sample->sample_data[(int)x1*2];
if((int)x2 >= sample->sample_info.frames)
{
y2 = 0;
}
else
{
y2 = sample->sample_data[(int)x2*2];
}
/* If current pos matches to sample point, don't need to interpolate (make CPU overhead) */
if (x3 == x1)
{
*dataL = sample->sample_data[(int)x3*2];
}
else
{
unsigned int method = WorkingInterpolationMethod;
if(Rendering == true)
method = RenderInterpolationMethod;
switch (method)
{
case Interpol_linear:
{
*dataL = Interpolate_Line(x1, y1, x2, y2, x3);
}
break;
case Interpol_3dHermit:
{
float dX = (float)(cursor_pos - x1);
float xm1 = x1 > 0 ? sample->sample_data[(int)(x1-1)*2] : 0;
float _x0 = sample->sample_data[(int)x1*2];
float _x1 = (x1+1) <= (sample->sample_info.frames -1) ? sample->sample_data[(int)(x1 + 1)*2] : sample->sample_data[(int)x1*2];
float _x2 = (x1+2) <= (sample->sample_info.frames -1) ? sample->sample_data[(int)(x1 + 2)*2] : sample->sample_data[(int)x1*2];
// float a = (3 * (_x0-_x1) - xm1 + _x2) / 2;
// float b = 2*_x1 + xm1 - (5*_x0 + _x2) / 2;
// float c = (_x1 - xm1) / 2;
*dataL = (((((3 * (_x0-_x1) - xm1 + _x2) / 2) * dX) +\
(2*_x1 + xm1 - (5*_x0 + _x2) / 2)) * dX + ((_x1 - xm1) / 2)) * dX + _x0;
}
break;
case Interpol_6dHermit:
{
float dX = (float)(cursor_pos - x1);
int i = 0;
unsigned int pX = (x1 > 1)? (unsigned int)x1-2: 0;
for (i = 0; i<6;++i)
{
if ((pX + i) < (sample->sample_info.frames -1))
{
Y[i] = sample->sample_data[(int)(pX+i)*2];
}
else
{
Y[i] = 0;
}
}
*dataL = Gaussian_Interpol(Y, dX);
}
break;
case Interpol_64Sinc:
case Interpol_128Sinc:
case Interpol_256Sinc:
{
double dX = (cursor_pos - x1);
unsigned int num = 64;
if (method == Interpol_128Sinc)
{
num = 128;
}
else if (method == Interpol_256Sinc)
{
num = 256;
}
unsigned int uiLBorder;
uiLBorder = int(x1 - num/2);
for (unsigned int i = 0; i<num; ++i)
{
if (((uiLBorder + i) >= 0) && ((uiLBorder + i) < sample->sample_info.frames))
{
Yi[i] = sample->sample_data[(int)(uiLBorder + i)*2];
}
else
{
Yi[i] = 0;
}
}
*dataL = Sinc_Interpolate(Yi,dX,num);
}
break;
default:
{
}
break;
}
}
// process right
y1 = sample->sample_data[(int)x1*2 + 1];
if(((int)x2 + 1) >= sample->sample_info.frames)
{
y2 = 0;
}
else
{
y2 = sample->sample_data[(int)x2*2 + 1];
}
/* If current pos matches to sample point, don't need to interpolate (make CPU overhead) */
if (x3 == x1)
{
*dataR = sample->sample_data[(int)x3*2 + 1];
}
else
{
unsigned int method = WorkingInterpolationMethod;
if(Rendering == true)
method = RenderInterpolationMethod;
switch (method)
{
case Interpol_linear:
{
*dataR = Interpolate_Line(x1, y1, x2, y2, x3);
}
break;
case Interpol_3dHermit:
{
float dX = (float)(cursor_pos - x1);
float xm1 = x1 > 0 ? sample->sample_data[(int)(x1-1)*2 + 1] : 0;
float _x0 = sample->sample_data[(int)x1*2 + 1];
float _x1 = (x1+1) <= (sample->sample_info.frames -1) ? sample->sample_data[(int)(x1 + 1)*2 + 1] : sample->sample_data[(int)x1*2 + 1];
float _x2 = (x1+2) <= (sample->sample_info.frames -1) ? sample->sample_data[(int)(x1 + 2)*2 + 1] : sample->sample_data[(int)x1*2 + 1];
// float a = (3 * (_x0-_x1) - xm1 + _x2) / 2;
// float b = 2*_x1 + xm1 - (5*_x0 + _x2) / 2;
// float c = (_x1 - xm1) / 2;
*dataR = (((((3 * (_x0-_x1) - xm1 + _x2) / 2) * dX) +\
(2*_x1 + xm1 - (5*_x0 + _x2) / 2)) * dX + ((_x1 - xm1) / 2)) * dX + _x0;
}
break;
case Interpol_6dHermit:
{
float dX = (float)(cursor_pos - x1);
int i = 0;
unsigned int pX = (x1 > 1)? (unsigned int)x1-2: 0;
for (i = 0; i<6;++i)
{
if ((pX + i) < (sample->sample_info.frames -1))
{
Y[i] = sample->sample_data[(int)(pX+i)*2 + 1];
}
else
{
Y[i] = 0;
}
}
*dataR = Gaussian_Interpol(Y, dX);
}
break;
case Interpol_64Sinc:
case Interpol_128Sinc:
case Interpol_256Sinc:
{
double dX = (cursor_pos - x1);
unsigned int num = 64;
if (method == Interpol_128Sinc)
{
num = 128;
}
else if (method == Interpol_256Sinc)
{
num = 256;
}
unsigned int uiLBorder;
uiLBorder = int(x1 - num/2);
for (unsigned int i = 0; i<num; ++i)
{
if (((uiLBorder + i) >= 0) && ((uiLBorder + i) < sample->sample_info.frames))
{
Yi[i] = sample->sample_data[(int)(uiLBorder + i)*2 + 1];
}
else
{
Yi[i] = 0;
}
}
*dataR = Sinc_Interpolate(Yi, dX, num);
}
break;
default:
{
}
break;
}
}
}
void PortAudio_UpdateDevices(int out_device_idx, int in_device_idx)
{
inputParameters.device = (PaDeviceIndex) in_device_idx;
inputParameters.channelCount = 2;
inputParameters.hostApiSpecificStreamInfo = NULL;
inputParameters.sampleFormat = paFloat32;
if (in_device_idx != -1)
{
inputParameters.suggestedLatency =
(Pa_GetDeviceInfo(inputParameters.device))->defaultLowInputLatency;
}
else
{
inputParameters.suggestedLatency = 0;
}
outputParameters.device = (PaDeviceIndex) out_device_idx;
outputParameters.channelCount = 2;
outputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.sampleFormat = paFloat32;
if (out_device_idx != -1)
{
outputParameters.suggestedLatency =
(Pa_GetDeviceInfo(outputParameters.device))->defaultLowOutputLatency;
}
else