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stss.c
资源名称：NETVIDEO.rar　[点击查看]
上传用户：sun1608
上传日期：2007-02-02
资源大小：6116k
文件大小：2k
源码类别：

流媒体/Mpeg4/MP4

开发平台：

Visual C++

stss.c：源码内容
  1. #include "quicktime.h"
  4. int quicktime_stss_init(quicktime_stss_t *stss)
  5. {
  6. stss->version = 0;
  7. stss->flags = 0;
  8. stss->total_entries = 0;
  9. stss->entries_allocated = 0;
  10. }
  12. int quicktime_stss_init_common(quicktime_t *file, quicktime_stss_t *stss)
  13. {
  14. if (stss->entries_allocated == 0) {
  15. stss->entries_allocated = 100;
  16. stss->table = (quicktime_stss_table_t*)
  17. malloc(sizeof(quicktime_stss_table_t) * stss->entries_allocated);
  18. }
  19. }
  21. int quicktime_stss_delete(quicktime_stss_t *stss)
  22. {
  23. if(stss->total_entries) 
  24. free(stss->table);
  25. stss->total_entries = 0;
  26. }
  28. int quicktime_stss_dump(quicktime_stss_t *stss)
  29. {
  30. int i;
  31. printf("     sync samplen");
  32. printf("      version %dn", stss->version);
  33. printf("      flags %dn", stss->flags);
  34. printf("      total_entries %dn", stss->total_entries);
  35. for(i = 0; i < stss->total_entries; i++)
  36. {
  37. printf("       sample %un", stss->table[i].sample);
  38. }
  39. }
  41. int quicktime_read_stss(quicktime_t *file, quicktime_stss_t *stss)
  42. {
  43. int i;
  44. stss->version = quicktime_read_char(file);
  45. stss->flags = quicktime_read_int24(file);
  46. stss->total_entries = quicktime_read_int32(file);
  48. stss->table = (quicktime_stss_table_t*)malloc(sizeof(quicktime_stss_table_t) * stss->total_entries);
  49. for(i = 0; i < stss->total_entries; i++)
  50. {
  51. stss->table[i].sample = quicktime_read_int32(file);
  52. }
  53. }
  56. int quicktime_write_stss(quicktime_t *file, quicktime_stss_t *stss)
  57. {
  58. int i;
  59. quicktime_atom_t atom;
  61. if(stss->total_entries)
  62. {
  63. quicktime_atom_write_header(file, &atom, "stss");
  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. }
  73. quicktime_atom_write_footer(file, &atom);
  74. }
  75. }
  77. int quicktime_update_stss(quicktime_stss_t *stss, long sample)
  78. {
  79. if (stss->total_entries >= stss->entries_allocated) {
  80. stss->entries_allocated *= 2;
  81. stss->table = (quicktime_stss_table_t*)realloc(stss->table,
  82. sizeof(quicktime_stss_table_t) * stss->entries_allocated);
  83. }
  85. stss->table[stss->total_entries++].sample = sample;
  86. }