quicktime/avi_indx.c

   1 #include "funcprotos.h"
   2 #include "quicktime.h"
   3 #include <string.h>
   4
   5
   6 void quicktime_delete_indx(quicktime_indx_t *indx)
   7 {
   8         int i;
   9         if(indx->table)
  10         {
  11                 for(i = 0; i < indx->table_size; i++)
  12                 {
  13                         quicktime_indxtable_t *indx_table = &indx->table[i];
  14                         if(indx_table->ix) quicktime_delete_ix(indx_table->ix);
  15                 }
  16                 free(indx->table);
  17         }
  18 }
  19
  20 void quicktime_init_indx(quicktime_t *file,
  21         quicktime_indx_t *indx,
  22         quicktime_strl_t *strl)
  23 {
  24         indx->longs_per_entry = 4;
  25         indx->index_subtype = 0;
  26         indx->index_type = AVI_INDEX_OF_INDEXES;
  27         memcpy(indx->chunk_id, strl->tag, 4);
  28 }
  29
  30 void quicktime_update_indx(quicktime_t *file,
  31         quicktime_indx_t *indx,
  32         quicktime_ix_t *ix)
  33 {
  34         quicktime_indxtable_t *indx_table;
  35
  36 /* Allocate */
  37         if(indx->table_size >= indx->table_allocation)
  38         {
  39                 quicktime_indxtable_t *old_table = indx->table;
  40                 int new_allocation = indx->table_allocation * 2;
  41                 if(new_allocation < 1) new_allocation = 1;
  42                 indx->table = calloc(1, sizeof(quicktime_indxtable_t) * new_allocation);
  43                 if(old_table)
  44                 {
  45                         memcpy(indx->table, old_table, sizeof(quicktime_indxtable_t) * indx->table_size);
  46                         free(old_table);
  47                 }
  48                 indx->table_allocation = new_allocation;
  49         }
  50
  51 /* Append */
  52         indx_table = &indx->table[indx->table_size++];
  53         indx_table->index_offset = ix->atom.start - 8;
  54         indx_table->index_size = ix->atom.size;
  55         indx_table->duration = ix->table_size;
  56 }
  57
  58
  59
  60 void quicktime_finalize_indx(quicktime_t *file)
  61 {
  62         int i, j;
  63         quicktime_riff_t *riff = file->riff[0];
  64         quicktime_hdrl_t *hdrl = &riff->hdrl;
  65         quicktime_strl_t *strl;
  66         quicktime_indx_t *indx;
  67         quicktime_atom_t junk_atom;
  68         int junk_size;
  69
  70
  71         for(i = 0; i < file->moov.total_tracks; i++)
  72         {
  73                 strl = hdrl->strl[i];
  74                 indx = &strl->indx;
  75
  76 /* Write indx */
  77                 quicktime_set_position(file, strl->indx_offset);
  78                 quicktime_atom_write_header(file, &indx->atom, "indx");
  79 /* longs per entry */
  80                 quicktime_write_int16_le(file, indx->longs_per_entry);
  81 /* index sub type */
  82                 quicktime_write_char(file, indx->index_subtype);
  83 /* index type */
  84                 quicktime_write_char(file, indx->index_type);
  85 /* entries in use */
  86                 quicktime_write_int32_le(file, indx->table_size);
  87 /* chunk ID */
  88                 quicktime_write_char32(file, indx->chunk_id);
  89 /* reserved */
  90                 quicktime_write_int32_le(file, 0);
  91                 quicktime_write_int32_le(file, 0);
  92                 quicktime_write_int32_le(file, 0);
  93
  94 /* table */
  95                 for(j = 0; j < indx->table_size; j++)
  96                 {
  97                         quicktime_indxtable_t *indx_table = &indx->table[j];
  98                         quicktime_write_int64_le(file, indx_table->index_offset);
  99                         quicktime_write_int32_le(file, indx_table->index_size);
 100                         quicktime_write_int32_le(file, indx_table->duration);
 101                 }
 102
 103                 quicktime_atom_write_footer(file, &indx->atom);
 104
 105
 106
 107 /* Rewrite JUNK less indx size and indx header size */
 108                 junk_size = strl->padding_size - indx->atom.size - 8;
 109                 quicktime_atom_write_header(file, &junk_atom, "JUNK");
 110                 for(j = 0; j < junk_size; j += 4)
 111                         quicktime_write_int32_le(file, 0);
 112                 quicktime_atom_write_footer(file, &junk_atom);
 113
 114         }
 115 }
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125 void quicktime_read_indx(quicktime_t *file,
 126         quicktime_strl_t *strl,
 127         quicktime_atom_t *parent_atom)
 128 {
 129         quicktime_indx_t *indx = &strl->indx;
 130         quicktime_indxtable_t *indx_table;
 131         quicktime_ix_t *ix;
 132         int i;
 133         int64_t offset;
 134
 135         indx->longs_per_entry = quicktime_read_int16_le(file);
 136         indx->index_subtype = quicktime_read_char(file);
 137         indx->index_type = quicktime_read_char(file);
 138         indx->table_size = quicktime_read_int32_le(file);
 139         quicktime_read_char32(file, indx->chunk_id);
 140         quicktime_read_int32_le(file);
 141         quicktime_read_int32_le(file);
 142         quicktime_read_int32_le(file);
 143
 144
 145 //printf("quicktime_read_indx 1\n");
 146 /* Read indx entries */
 147         indx->table = calloc(indx->table_size, sizeof(quicktime_indxtable_t));
 148         for(i = 0; i < indx->table_size; i++)
 149         {
 150                 indx_table = &indx->table[i];
 151                 indx_table->index_offset = quicktime_read_int64_le(file);
 152                 indx_table->index_size = quicktime_read_int32_le(file);
 153                 indx_table->duration = quicktime_read_int32_le(file);
 154                 offset = quicktime_position(file);
 155
 156                 indx_table->ix = calloc(indx->table_size, sizeof(quicktime_ix_t*));
 157
 158 /* Now read the partial index */
 159                 ix = indx_table->ix = calloc(1, sizeof(quicktime_ix_t));
 160                 quicktime_set_position(file, indx_table->index_offset);
 161                 quicktime_read_ix(file, ix);
 162                 quicktime_set_position(file, offset);
 163         }
 164 //printf("quicktime_read_indx 100\n");
 165
 166 }
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