hvirtual/guicast/units.h

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#ifndef UNITS_H
#define UNITS_H

#include "sizes.h"

#include <math.h>
#include <stdint.h>
#include <stdio.h>


#define INFINITYGAIN -40
#define MAXGAIN 50
#define TOTALFREQS 1024

// h:mm:ss.sss
#define TIME_HMS 0
// h:mm:ss
#define TIME_HMS2 6
// hh:mm:ss
#define TIME_HMS3 7
// h:mm:ss:ff
#define TIME_SECONDS 8
#define TIME_HMSF 1
#define TIME_SAMPLES 2
#define TIME_SAMPLES_HEX 3
#define TIME_FRAMES 4
// fffff-ff
#define TIME_FEET_FRAMES 5
#define TIME_SECONDS__STR      "ssss.sss"
#define TIME_HMS__STR          "h:mm:ss.sss"
#define TIME_HMS2__STR         "h:mm:ss"
#define TIME_HMS3__STR         "hh:mm:ss"
#define TIME_HMSF__STR         "h:mm:ss:ff"
#define TIME_SAMPLES__STR      "audio samples"
#define TIME_SAMPLES_HEX__STR  "audio samples (hex)"
#define TIME_FRAMES__STR       "video frames"
#define TIME_FEET_FRAMES__STR  "video frames (feet)"

class DB
{
public:
        DB(float infinitygain = INFINITYGAIN);
        virtual ~DB() {};
        
// return power of db using a table
        float fromdb_table();
        float fromdb_table(float db);
// return power from db using log10
        float fromdb();
        static float fromdb(float db);

// convert db to power using a formula
        static float todb(float power);

        inline DB& operator++() { if(db < MAXGAIN) db += 0.1; return *this; };
        inline DB& operator--() { if(db > INFINITYGAIN) db -= 0.1; return *this; };
        inline DB& operator=(DB &newdb) { db = newdb.db; return *this; };
        inline DB& operator=(int newdb) { db = newdb; return *this; };
        inline int operator==(DB &newdb) { return db == newdb.db; };
        inline int operator==(int newdb) { return db == newdb; };

        static float *topower;
        float db;
        float infinitygain;
 private:
        static float *allocated;
};

// Third octave frequency table
class Freq
{
public:
        Freq();
        Freq(const Freq& oldfreq);
        virtual ~Freq() {};

        static void init_table();

// set freq to index given
        static int tofreq(int index);

// return index of frequency
        int fromfreq();
        static int fromfreq(int index);

// increment frequency by one
        Freq& operator++();
        Freq& operator--();
        
        int operator>(Freq &newfreq);
        int operator<(Freq &newfreq);
        Freq& operator=(const Freq &newfreq);
        int operator=(const int newfreq);
        int operator!=(Freq &newfreq);
        int operator==(Freq &newfreq);
        int operator==(int newfreq);

        static int *freqtable;
        int freq;
};


class Units
{
public:
        Units() {};

        static int timeformat_totype(char *tcf);

// No rounding.
        static float toframes(int64_t samples, int sample_rate, float framerate);
// Round up if > .5
        static int64_t toframes_round(int64_t samples, int sample_rate, float framerate);
        static double fix_framerate(double value);
        static double atoframerate(char *text);


// Punctuate with commas
        static void punctuate(char *string);


// separator strings for BC_TextBox::set_separators
// Returns 0 if the format has no separators.
        static char* format_to_separators(int time_format);

        static int64_t tosamples(float frames, int sample_rate, float framerate);
// give text representation as time
        static char* totext(char *text, 
                                int64_t samples, 
                                int time_format, 
                                int samplerate, 
                                float frame_rate = 0, 
                                float frames_per_foot = 0);
// give text representation as time
        static char* totext(char *text, 
                                double seconds, 
                                int time_format, 
                                int sample_rate = 0,
                                float frame_rate = 0, 
                                float frames_per_foot = 0);    
// convert time to samples
        static int64_t fromtext(char *text, 
                                int samplerate, 
                                int time_format, 
                                float frame_rate, 
                                float frames_per_foot);
// Convert text to seconds
        static double text_to_seconds(char *text, 
                                int samplerate, 
                                int time_format, 
                                float frame_rate, 
                                float frames_per_foot);   

        static char* print_time_format(int time_format, char *string);

        static float xy_to_polar(int x, int y);
        static void polar_to_xy(float angle, int radius, int &x, int &y);

// Numbers < 0 round down if next digit is < 5
// Numbers > 0 round up if next digit is > 5
        static int64_t round(double result);

// Flooring type converter rounded to nearest .001
        static int64_t to_int64(double result);

        static float quantize10(float value);
        static float quantize(float value, float precision);

        static void* int64_to_ptr(uint64_t value);
        static uint64_t ptr_to_int64(void *ptr);

// Comparisons between double seem to work more often when this is called
// on the comparison values.
        static void fix_double(double *x);
};

#endif

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