mod/main.h

   1 #define MOD_NO_NOTE     63
   2 #define MOD_NO_SAMPLE   31
   3
   4 #define FREQ 44100
   5
   6 #define LOG(x, fmt)             fprintf(stdout, "LOG: %s : %" #fmt "\n", #x, x)
   7 #define CHECK(x)                fprintf(stdout, "%s\n", #x)
   8
   9 typedef uint8_t u8;
  10 typedef uint16_t u16;
  11 typedef uint32_t u32;
  12
  13 typedef int8_t s8;
  14 typedef int16_t s16;
  15 typedef int32_t s32;
  16
  17 struct sample_header {
  18         u8 name[22]; //22 bytes
  19         u16 length; //2 bytes
  20         u8 finetune; //1 byte
  21         u8 vol; //1 byte
  22         u16 loopstart; //2 bytes
  23         u16 looplength; //2 bytes //more like loop-end
  24         char *smpdata; //1 byte
  25 };
  26
  27 struct pattern_entry {
  28         u16 period;
  29         u8 sample;
  30         u8 effect;
  31         u8 param;
  32 };
  33
  34 struct pattern {
  35         struct pattern_entry pattern_entry[64][4];
  36 };
  37
  38 struct mod_header {
  39         char name[20];
  40         struct sample_header sample[31];
  41         u8 order[128];
  42         //u8 **pattern;
  43         struct pattern *patterns;
  44         u8 orderCount;
  45         u8 patternCount;
  46         int speed;
  47         int tempo;
  48 };
  49
  50 struct mix_channel {
  51         //char *data;
  52         double smp_index;
  53         double inc;
  54         u32 vol;
  55         u32 length;
  56         u32 looplength;
  57
  58         int currsample;
  59         int currnote;
  60
  61         int last_sample;
  62 }mix_channels[4];
  63
  64 struct mod_header modheader;
  65
  66 void process_row(void);
  67 s8 get_sample(struct mix_channel *chn);
  68 s8 mix(void);
  69 void update(void);
  70 void init_player(void);
  71
  72 int sdl_init(void);