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Ap4DecoderSpecificInfoDescriptor.cpp
资源名称：fullMPCcode.rar　[点击查看]
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上传日期：2015-12-05
资源大小：22823k
文件大小：4k
源码类别：

多媒体编程

开发平台：

Visual C++

Ap4DecoderSpecificInfoDescriptor.cpp：源码内容
  1. /*****************************************************************
  2. |
  3. |    AP4 - DecoderSpecificInfo Descriptors
  4. |
  5. |    Copyright 2002 Gilles Boccon-Gibod
  6. |
  7. |
  8. |    This file is part of Bento4/AP4 (MP4 Atom Processing Library).
  9. |
  10. |    Unless you have obtained Bento4 under a difference license,
  11. |    this version of Bento4 is Bento4|GPL.
  12. |    Bento4|GPL is free software; you can redistribute it and/or modify
  13. |    it under the terms of the GNU General Public License as published by
  14. |    the Free Software Foundation; either version 2, or (at your option)
  15. |    any later version.
  16. |
  17. |    Bento4|GPL is distributed in the hope that it will be useful,
  18. |    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19. |    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20. |    GNU General Public License for more details.
  21. |
  22. |    You should have received a copy of the GNU General Public License
  23. |    along with Bento4|GPL; see the file COPYING.  If not, write to the
  24. |    Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  25. |    02111-1307, USA.
  26. |
  27.  ****************************************************************/
  29. /*----------------------------------------------------------------------
  30. |       includes
  31. +---------------------------------------------------------------------*/
  32. #include "Ap4.h"
  33. #include "Ap4DecoderSpecificInfoDescriptor.h"
  34. #include "Ap4DescriptorFactory.h"
  35. #include "Ap4Utils.h"
  37. /*----------------------------------------------------------------------
  38. |       AP4_DecoderSpecificInfoDescriptor::AP4_DecoderSpecificInfoDescriptor
  39. +---------------------------------------------------------------------*/
  40. AP4_DecoderSpecificInfoDescriptor::AP4_DecoderSpecificInfoDescriptor(
  41.     const AP4_DataBuffer& data) :
  42.     AP4_Descriptor(AP4_DESCRIPTOR_TAG_DECODER_SPECIFIC_INFO, 
  43.                    MinHeaderSize(data.GetDataSize()), 
  44.                    data.GetDataSize()),
  45.     m_Info(data)
  46. {
  47. }
  49. /*----------------------------------------------------------------------
  50. |       AP4_DecoderSpecificInfoDescriptor::AP4_DecoderSpecificInfoDescriptor
  51. +---------------------------------------------------------------------*/
  52. AP4_DecoderSpecificInfoDescriptor::AP4_DecoderSpecificInfoDescriptor(
  53.     AP4_ByteStream& stream, AP4_Size header_size, AP4_Size payload_size) :
  54.     AP4_Descriptor(AP4_DESCRIPTOR_TAG_DECODER_SPECIFIC_INFO, 
  55.                    header_size, payload_size)
  56. {
  57.     m_Info.SetDataSize(payload_size);
  58. stream.Read(m_Info.UseData(), payload_size);
  59. }
  61. /*----------------------------------------------------------------------
  62. |       AP4_DecoderSpecificInfoDescriptor::~AP4_DecoderSpecificInfoDescriptor
  63. +---------------------------------------------------------------------*/
  64. AP4_DecoderSpecificInfoDescriptor::~AP4_DecoderSpecificInfoDescriptor()
  65. {
  66. }
  68. /*----------------------------------------------------------------------
  69. |       AP4_DecoderSpecificInfoDescriptor::WriteFields
  70. +---------------------------------------------------------------------*/
  71. AP4_Result
  72. AP4_DecoderSpecificInfoDescriptor::WriteFields(AP4_ByteStream& stream)
  73. {
  74.     // write the info buffer
  75.     if (m_PayloadSize && m_Info.GetDataSize()) {
  76.         stream.Write(m_Info.GetData(), m_Info.GetDataSize());
  77.     }
  79.     return AP4_SUCCESS;
  80. }
  82. /*----------------------------------------------------------------------
  83. |       AP4_DecoderSpecificInfoDescriptor::Inspect
  84. +---------------------------------------------------------------------*/
  85. AP4_Result
  86. AP4_DecoderSpecificInfoDescriptor::Inspect(AP4_AtomInspector& inspector)
  87. {
  88.     char* info = new char[m_Info.GetDataSize()*3+1];
  89.     for (unsigned int i=0; i<m_Info.GetDataSize(); i++) {
  90. AP4_StringFormat(&info[i*3], 3, "%02x ", m_Info.UseData()[i]);
  91. }
  92.     info[m_Info.GetDataSize()*3] = '';
  93.     inspector.AddField("#[DecoderSpecificInfo]", info);
  94.     delete[] info;
  96.     return AP4_SUCCESS;
  97. }