atom_mp4a.cpp 1.6 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. MP4Mp4aAtom::MP4Mp4aAtom()
  23. : MP4Atom("mp4a")
  24. {
  25. AddReserved("reserved1", 6); /* 0 */
  26. AddProperty( /* 1 */
  27. new MP4Integer16Property("dataReferenceIndex"));
  28. AddReserved("reserved2", 16); /* 2 */
  29. AddProperty( /* 3 */
  30. new MP4Integer16Property("timeScale"));
  31. AddReserved("reserved3", 2); /* 4 */
  32. ExpectChildAtom("esds", Required, OnlyOne);
  33. }
  34. void MP4Mp4aAtom::Generate()
  35. {
  36. MP4Atom::Generate();
  37. ((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
  38. // property reserved2 has non-zero fixed values
  39. static u_int8_t reserved2[16] = {
  40. 0x00, 0x00, 0x00, 0x00,
  41. 0x00, 0x00, 0x00, 0x00,
  42. 0x00, 0x02, 0x00, 0x10,
  43. 0x00, 0x00, 0x00, 0x00,
  44. };
  45. m_pProperties[2]->SetReadOnly(false);
  46. ((MP4BytesProperty*)m_pProperties[2])->
  47. SetValue(reserved2, sizeof(reserved2));
  48. m_pProperties[2]->SetReadOnly(true);
  49. }