232 lines
6.0 KiB
C++
232 lines
6.0 KiB
C++
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#include "main.h"
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#include "EqBand.h"
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#include "WinampAttributes.h"
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#include <math.h>
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extern int filter_srate, filter_enabled, filter_top, filter_top2;
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extern float preamp_val;
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static int filter_nch=0;
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static bool init=false;
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static EqBand benskiQ[10];
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//#define BENSKIQ_Q 0.70710678118654752440084436210485
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#define BENSKIQ_Q 1.41
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static double benskiQ_freqs_iso[10]={31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000, 16000}; // ISO standard equalizer frequency table
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static double benskiQ_freqs[10]={ 70, 180, 320, 600, 1000, 3000, 6000, 12000, 14000, 16000 }; // winamp style frequency table
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static CRITICAL_SECTION benskiQ_cs;
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void benskiQ_init()
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{
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InitializeCriticalSection(&benskiQ_cs);
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for (int x=0;x<10;x++)
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{
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benskiQ[x].set_parameters((config_eq_frequencies==EQ_FREQUENCIES_WINAMP)?benskiQ_freqs[x]:benskiQ_freqs_iso[x], 1.0, BENSKIQ_Q);
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}
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}
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static __inline double VALTODB(int v)
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{
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v -= 31;
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if (v < -31) v = -31;
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if (v > 32) v = 32;
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if (v > 0) return -12.0*(v / 32.0);
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else if (v < 0)
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{
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return -12.0*(v / 31.0);
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}
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return 0.0f;
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}
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static __inline double VALTOGAIN(int v)
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{
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return pow(10.0, VALTODB(v)/20.0);
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}
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void benskiQ_eq_set(char data[10])
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{
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if (!init)
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{
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init=true; benskiQ_init();
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}
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EnterCriticalSection(&benskiQ_cs);
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for (int x = 0; x < 10; x ++)
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{
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benskiQ[x].set_parameters((config_eq_frequencies==EQ_FREQUENCIES_WINAMP)?benskiQ_freqs[x]:benskiQ_freqs_iso[x], VALTOGAIN(data[x]), BENSKIQ_Q);
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}
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LeaveCriticalSection(&benskiQ_cs);
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}
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static void FillFloat(float **floatBuf, void *samples, size_t bps, size_t numSamples, size_t numChannels, float preamp)
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{
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switch (bps)
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{
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case 8:
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{
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preamp /= 256.0f;
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unsigned __int8 *samples8 = (unsigned __int8 *)samples;
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for (size_t c=0;c<numChannels;c++)
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for (size_t x = 0; x != numSamples; x ++)
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{
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floatBuf[c][x] = (float)(samples8[c+numChannels*x]-128) * preamp;
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}
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}
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break;
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case 16:
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{
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preamp/=32768.0f;
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short *samples16 = (short *)samples;
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for (size_t c=0;c<numChannels;c++)
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for (size_t x = 0; x != numSamples; x ++)
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{
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floatBuf[c][x] = (float)samples16[c+numChannels*x] * preamp;
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}
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}
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break;
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case 24:
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{
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preamp/=2147483648.0f;
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unsigned __int8 *samples8 = (unsigned __int8 *)samples;
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long temp;
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for (size_t x = 0; x != numSamples; x ++)
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for (size_t c=0;c<numChannels;c++)
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{
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temp = (((long)samples8[0]) << 8);
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temp = temp | (((long)samples8[1]) << 16);
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temp = temp | (((long)samples8[2]) << 24);
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floatBuf[c][x] = (float)temp * preamp;
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samples8+=3;
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}
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}
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break;
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case 32:
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{
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preamp /= 2147483648.0f;
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int32_t *samples32 = (int32_t *)samples;
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for (size_t x = 0; x != numSamples; x ++)
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for (size_t c=0;c<numChannels;c++)
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{
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floatBuf[c][x] = (float)samples32[c+x*numChannels] * preamp;
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}
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}
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break;
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}
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}
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static void FillSamples(void *samples, float **floatBuf, size_t bps, size_t numSamples, size_t numChannels)
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{
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switch (bps)
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{
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case 16:
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for (size_t i=0;i<numChannels;i++)
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Float32_To_Int16_Clip((char *)samples+i*(bps/8), (signed int)numChannels, floatBuf[i], 1, (unsigned int) numSamples);
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break;
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case 24:
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for (size_t i=0;i<numChannels;i++)
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Float32_To_Int24_Clip((char *)samples+i*(bps/8), (signed int)numChannels, floatBuf[i], 1, (unsigned int) numSamples);
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break;
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}
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}
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static int last_nch=0, last_numsamples=0;
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static float **last_sample=0;
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void DeleteSample(float **big, int nch)
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{
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for (int i=0;i<nch;i++)
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delete big[i];
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delete[]big;
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}
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float **MakeSample(int numsamples, int nch)
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{
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if (last_nch < nch || last_numsamples < numsamples)
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{
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DeleteSample(last_sample, last_nch);
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last_nch=max(nch, last_nch);
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last_numsamples=max(numsamples, last_numsamples);
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last_sample = new float*[last_nch];
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for (int i=0;i<last_nch;i++)
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last_sample [i]=new float[last_numsamples];
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}
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return last_sample;
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}
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void benskiQ_reset(int srate, int nch)
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{
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for (int i=0;i<10;i++)
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{
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benskiQ[i].SetSampleRate(srate);
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benskiQ[i].set_num_channels(nch);
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}
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int x;
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if (config_eq_frequencies == EQ_FREQUENCIES_WINAMP)
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for (x = 0; x < 10 && benskiQ_freqs[x]*2 <= srate; x++);
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else
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for (x = 0; x < 10 && benskiQ_freqs_iso[x]*2 <= srate; x++);
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filter_top = min(x, filter_top2);
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filter_srate=srate;
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filter_nch=nch;
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}
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static float NonReplayGainAdjust()
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{
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if (!(in_mod->UsesOutputPlug&IN_MODULE_FLAG_REPLAYGAIN) && config_replaygain.GetBool())
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return pow(10.0f, (float)config_replaygain_non_rg_gain/20.0f);
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else
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return 1.0f;
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}
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static float ReplayGainPreamp()
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{
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if (!(in_mod->UsesOutputPlug&IN_MODULE_FLAG_REPLAYGAIN_PREAMP) && config_replaygain.GetBool())
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return pow(10.0f, (float)config_replaygain_preamp/20.0f);
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else
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return 1.0f;
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}
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int benskiQ_eq_dosamples(short *samples, int numsamples, int bps, int nch, int srate)
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{
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if (filter_enabled && in_mod && !(in_mod->UsesOutputPlug&IN_MODULE_FLAG_EQ) && bps != 32)
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{
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if (srate !=filter_srate || nch != filter_nch)
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benskiQ_reset(srate, nch);
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if (!init)
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{
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init=true; benskiQ_init();
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}
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float **in = MakeSample(numsamples, nch);
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FillFloat(in, samples, bps, numsamples, nch, preamp_val*NonReplayGainAdjust()*ReplayGainPreamp());
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EnterCriticalSection(&benskiQ_cs);
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for (int x = 0; x < filter_top; x ++)
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{
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benskiQ[x].process(in, in, numsamples, nch);
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}
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LeaveCriticalSection(&benskiQ_cs);
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FillSamples(samples, in, bps, numsamples, nch);
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}
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else if (!(in_mod->UsesOutputPlug&IN_MODULE_FLAG_REPLAYGAIN) && config_replaygain.GetBool() && (config_replaygain_non_rg_gain.GetFloat() != 0) && bps != 32)
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{
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float **in = MakeSample(numsamples, nch);
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FillFloat(in, samples, bps, numsamples, nch, NonReplayGainAdjust()*ReplayGainPreamp());
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FillSamples(samples, in, bps, numsamples, nch);
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}
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else if (!(in_mod->UsesOutputPlug&IN_MODULE_FLAG_REPLAYGAIN_PREAMP) && config_replaygain.GetBool() && (config_replaygain_preamp.GetFloat() != 0) && bps != 32)
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{
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float **in = MakeSample(numsamples, nch);
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FillFloat(in, samples, bps, numsamples, nch, ReplayGainPreamp());
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FillSamples(samples, in, bps, numsamples, nch);
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}
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else
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filter_srate = 0;
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return dsp_dosamples(samples, numsamples, bps, nch, srate);
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}
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