hvirtual/guicast/units.h

   1 #ifndef UNITS_H
   2 #define UNITS_H
   3
   4 #include "sizes.h"
   5
   6 #include <math.h>
   7 #include <stdint.h>
   8 #include <stdio.h>
   9
  10
  11 #define INFINITYGAIN -40
  12 #define MAXGAIN 50
  13 #define TOTALFREQS 1024
  14
  15
  16 #define TIME_HMS 0
  17 #define TIME_HMS2 6
  18 #define TIME_HMSF 1
  19 #define TIME_SAMPLES 2
  20 #define TIME_SAMPLES_HEX 3
  21 #define TIME_FRAMES 4
  22 #define TIME_FEET_FRAMES 5
  23
  24
  25 class DB
  26 {
  27 public:
  28         DB(float infinitygain = INFINITYGAIN);
  29         virtual ~DB() {};
  30
  31 // return power of db using a table
  32         float fromdb_table();
  33         float fromdb_table(float db);
  34 // return power from db using log10
  35         float fromdb();
  36         static float fromdb(float db);
  37
  38 // convert db to power using a formula
  39         static float todb(float power);
  40
  41         inline DB& operator++() { if(db < MAXGAIN) db += 0.1; return *this; };
  42         inline DB& operator--() { if(db > INFINITYGAIN) db -= 0.1; return *this; };
  43         inline DB& operator=(DB &newdb) { db = newdb.db; return *this; };
  44         inline DB& operator=(int newdb) { db = newdb; return *this; };
  45         inline int operator==(DB &newdb) { return db == newdb.db; };
  46         inline int operator==(int newdb) { return db == newdb; };
  47
  48         static float *topower;
  49         float db;
  50         float infinitygain;
  51 };
  52
  53 // Third octave frequency table
  54 class Freq
  55 {
  56 public:
  57         Freq();
  58         Freq(const Freq& oldfreq);
  59         virtual ~Freq() {};
  60
  61         static void init_table();
  62
  63 // set freq to index given
  64         static int tofreq(int index);
  65
  66 // return index of frequency
  67         int fromfreq();
  68         static int fromfreq(int index);
  69
  70 // increment frequency by one
  71         Freq& operator++();
  72         Freq& operator--();
  73
  74         int operator>(Freq &newfreq);
  75         int operator<(Freq &newfreq);
  76         Freq& operator=(const Freq &newfreq);
  77         int operator=(const int newfreq);
  78         int operator!=(Freq &newfreq);
  79         int operator==(Freq &newfreq);
  80         int operator==(int newfreq);
  81
  82         static int *freqtable;
  83         int freq;
  84 };
  85
  86
  87 class Units
  88 {
  89 public:
  90         Units() {};
  91
  92         // No rounding.
  93         static float toframes(int64_t samples, int sample_rate, float framerate);
  94         // Round up if > .5
  95         static int64_t toframes_round(int64_t samples, int sample_rate, float framerate);
  96         static double fix_framerate(double value);
  97         static double atoframerate(char *text);
  98
  99
 100         static int64_t tosamples(float frames, int sample_rate, float framerate);
 101         static char* totext(char *text,
 102                                 int64_t samples,
 103                                 int time_format,
 104                                 int samplerate,
 105                                 float frame_rate = 0,
 106                                 float frames_per_foot = 0);    // give text representation as time
 107         static char* totext(char *text,
 108                                 double seconds,
 109                                 int time_format,
 110                                 int sample_rate = 0,
 111                                 float frame_rate = 0,
 112                                 float frames_per_foot = 0);    // give text representation as time
 113         static int64_t fromtext(char *text,
 114                                 int samplerate,
 115                                 int time_format,
 116                                 float frame_rate,
 117                                 float frames_per_foot);    // convert time to samples
 118         static double text_to_seconds(char *text,
 119                                 int samplerate,
 120                                 int time_format,
 121                                 float frame_rate,
 122                                 float frames_per_foot);   // Convert text to seconds
 123
 124         static char* print_time_format(int time_format, char *string);
 125
 126         static float xy_to_polar(int x, int y);
 127         static void polar_to_xy(float angle, int radius, int &x, int &y);
 128
 129 // Numbers < 0 round down if next digit is < 5
 130 // Numbers > 0 round up if next digit is > 5
 131         static int64_t round(double result);
 132
 133 // Flooring type converter rounded to nearest .001
 134         static int64_t to_int64(double result);
 135
 136         static float quantize10(float value);
 137         static float quantize(float value, float precision);
 138
 139         static void* int64_to_ptr(uint64_t value);
 140         static uint64_t ptr_to_int64(void *ptr);
 141 };
 142
 143 #endif