atom_tfhd.cpp 1.7 KB

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  1. /*
  2. * The contents of this file are subject to the Mozilla Public
  3. * License Version 1.1 (the "License"); you may not use this file
  4. * except in compliance with the License. You may obtain a copy of
  5. * the License at http://www.mozilla.org/MPL/
  6. *
  7. * Software distributed under the License is distributed on an "AS
  8. * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  9. * implied. See the License for the specific language governing
  10. * rights and limitations under the License.
  11. *
  12. * The Original Code is MPEG4IP.
  13. *
  14. * The Initial Developer of the Original Code is Cisco Systems Inc.
  15. * Portions created by Cisco Systems Inc. are
  16. * Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
  17. *
  18. * Contributor(s):
  19. * Dave Mackie [email protected]
  20. */
  21. #include "mp4common.h"
  22. MP4TfhdAtom::MP4TfhdAtom()
  23. : MP4Atom("tfhd")
  24. {
  25. AddVersionAndFlags(); /* 0, 1 */
  26. AddProperty( /* 2 */
  27. new MP4Integer32Property("trackId"));
  28. }
  29. void MP4TfhdAtom::AddProperties(u_int32_t flags)
  30. {
  31. if (flags & 0x01) {
  32. // note this property is signed 64!
  33. AddProperty(
  34. new MP4Integer64Property("baseDataOffset"));
  35. }
  36. if (flags & 0x02) {
  37. AddProperty(
  38. new MP4Integer32Property("sampleDescriptionIndex"));
  39. }
  40. if (flags & 0x08) {
  41. AddProperty(
  42. new MP4Integer32Property("defaultSampleDuration"));
  43. }
  44. if (flags & 0x10) {
  45. AddProperty(
  46. new MP4Integer32Property("defaultSampleSize"));
  47. }
  48. if (flags & 0x20) {
  49. AddProperty(
  50. new MP4Integer32Property("defaultSampleFlags"));
  51. }
  52. }
  53. void MP4TfhdAtom::Read()
  54. {
  55. /* read atom version, flags, and trackId */
  56. ReadProperties(0, 3);
  57. /* need to create the properties based on the atom flags */
  58. AddProperties(GetFlags());
  59. /* now we can read the remaining properties */
  60. ReadProperties(3);
  61. Skip(); // to end of atom
  62. }