quicktime/stss.c

   1 #include "funcprotos.h"
   2 #include "quicktime.h"
   3
   4
   5
   6 void quicktime_stss_init(quicktime_stss_t *stss)
   7 {
   8         stss->version = 0;
   9         stss->flags = 0;
  10         stss->total_entries = 0;
  11         stss->entries_allocated = 2;
  12         stss->table = (quicktime_stss_table_t*)calloc(1, sizeof(quicktime_stss_table_t) * stss->entries_allocated);
  13 }
  14
  15 void quicktime_stss_delete(quicktime_stss_t *stss)
  16 {
  17         if(stss->entries_allocated) free(stss->table);
  18         stss->total_entries = 0;
  19         stss->entries_allocated = 0;
  20         stss->table = 0;
  21 }
  22
  23 void quicktime_stss_dump(quicktime_stss_t *stss)
  24 {
  25         int i;
  26         printf("     sync sample\n");
  27         printf("      version %d\n", stss->version);
  28         printf("      flags %d\n", stss->flags);
  29         printf("      total_entries %d\n", stss->total_entries);
  30         for(i = 0; i < stss->total_entries; i++)
  31         {
  32                 printf("       sample %x\n", stss->table[i].sample);
  33         }
  34 }
  35
  36 void quicktime_read_stss(quicktime_t *file, quicktime_stss_t *stss)
  37 {
  38         int i;
  39         stss->version = quicktime_read_char(file);
  40         stss->flags = quicktime_read_int24(file);
  41         stss->total_entries = quicktime_read_int32(file);
  42
  43         if(stss->entries_allocated < stss->total_entries)
  44         {
  45                 stss->entries_allocated = stss->total_entries;
  46                 stss->table = (quicktime_stss_table_t*)realloc(stss->table, sizeof(quicktime_stss_table_t) * stss->entries_allocated);
  47         }
  48
  49         for(i = 0; i < stss->total_entries; i++)
  50         {
  51                 stss->table[i].sample = quicktime_read_int32(file);
  52         }
  53 }
  54
  55
  56 void quicktime_write_stss(quicktime_t *file, quicktime_stss_t *stss)
  57 {
  58         int i;
  59         quicktime_atom_t atom;
  60
  61         if(stss->total_entries)
  62         {
  63                 quicktime_atom_write_header(file, &atom, "stss");
  64
  65                 quicktime_write_char(file, stss->version);
  66                 quicktime_write_int24(file, stss->flags);
  67                 quicktime_write_int32(file, stss->total_entries);
  68                 for(i = 0; i < stss->total_entries; i++)
  69                 {
  70                         quicktime_write_int32(file, stss->table[i].sample);
  71                 }
  72
  73                 quicktime_atom_write_footer(file, &atom);
  74         }
  75 }