2 Copyright (c) 2004-2009, John Hurst
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6 modification, are permitted provided that the following conditions
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27 /*! \file JP2K_Sequence_Parser.cpp
29 \brief AS-DCP library, JPEG 2000 codestream essence reader implementation
33 #include <KM_fileio.h>
40 using namespace ASDCP;
43 //------------------------------------------------------------------------------------------
45 class FileList : public std::list<std::string>
47 std::string m_DirName;
53 const FileList& operator=(const std::list<std::string>& pathlist) {
54 std::list<std::string>::const_iterator i;
55 for ( i = pathlist.begin(); i != pathlist.end(); i++ )
60 Result_t InitFromDirectory(const char* path)
62 char next_file[Kumu::MaxFilePath];
63 Kumu::DirScanner Scanner;
65 Result_t result = Scanner.Open(path);
67 if ( ASDCP_SUCCESS(result) )
71 while ( ASDCP_SUCCESS(Scanner.GetNext(next_file)) )
73 if ( next_file[0] == '.' ) // no hidden files or internal links
76 std::string Str(m_DirName);
89 //------------------------------------------------------------------------------------------
91 class ASDCP::JP2K::SequenceParser::h__SequenceParser
94 Rational m_PictureRate;
96 FileList::iterator m_CurrentFile;
97 CodestreamParser m_Parser;
102 ASDCP_NO_COPY_CONSTRUCT(h__SequenceParser);
105 PictureDescriptor m_PDesc;
107 h__SequenceParser() : m_FramesRead(0), m_Pedantic(false)
109 memset(&m_PDesc, 0, sizeof(m_PDesc));
110 m_PDesc.EditRate = Rational(24,1);
118 Result_t OpenRead(const char* filename, bool pedantic);
119 Result_t OpenRead(const std::list<std::string>& file_list, bool pedantic);
125 m_CurrentFile = m_FileList.begin();
129 Result_t ReadFrame(FrameBuffer&);
135 ASDCP::JP2K::SequenceParser::h__SequenceParser::OpenRead()
137 if ( m_FileList.empty() )
138 return RESULT_ENDOFFILE;
140 m_CurrentFile = m_FileList.begin();
141 CodestreamParser Parser;
142 FrameBuffer TmpBuffer;
144 Kumu::fsize_t file_size = Kumu::FileSize((*m_CurrentFile).c_str());
146 if ( file_size == 0 )
147 return RESULT_NOT_FOUND;
149 assert(file_size <= 0xFFFFFFFFL);
150 Result_t result = TmpBuffer.Capacity((ui32_t) file_size);
152 if ( ASDCP_SUCCESS(result) )
153 result = Parser.OpenReadFrame((*m_CurrentFile).c_str(), TmpBuffer);
155 if ( ASDCP_SUCCESS(result) )
156 result = Parser.FillPictureDescriptor(m_PDesc);
159 if ( ASDCP_SUCCESS(result) )
160 m_PDesc.ContainerDuration = m_FileList.size();
167 ASDCP::JP2K::SequenceParser::h__SequenceParser::OpenRead(const char* filename, bool pedantic)
169 ASDCP_TEST_NULL_STR(filename);
170 m_Pedantic = pedantic;
172 Result_t result = m_FileList.InitFromDirectory(filename);
174 if ( ASDCP_SUCCESS(result) )
183 ASDCP::JP2K::SequenceParser::h__SequenceParser::OpenRead(const std::list<std::string>& file_list, bool pedantic)
185 m_Pedantic = pedantic;
186 m_FileList = file_list;
192 ASDCP::JP2K::SequenceParser::h__SequenceParser::ReadFrame(FrameBuffer& FB)
194 if ( m_CurrentFile == m_FileList.end() )
195 return RESULT_ENDOFFILE;
198 Result_t result = m_Parser.OpenReadFrame((*m_CurrentFile).c_str(), FB);
200 if ( ASDCP_SUCCESS(result) )
202 FB.FrameNumber(m_FramesRead++);
210 //------------------------------------------------------------------------------------------
212 ASDCP::JP2K::SequenceParser::SequenceParser()
216 ASDCP::JP2K::SequenceParser::~SequenceParser()
220 // Opens the stream for reading, parses enough data to provide a complete
221 // set of stream metadata for the MXFWriter below.
223 ASDCP::JP2K::SequenceParser::OpenRead(const char* filename, bool pedantic) const
225 const_cast<ASDCP::JP2K::SequenceParser*>(this)->m_Parser = new h__SequenceParser;
227 Result_t result = m_Parser->OpenRead(filename, pedantic);
229 if ( ASDCP_FAILURE(result) )
230 const_cast<ASDCP::JP2K::SequenceParser*>(this)->m_Parser.release();
237 ASDCP::JP2K::SequenceParser::OpenRead(const std::list<std::string>& file_list, bool pedantic) const
239 const_cast<ASDCP::JP2K::SequenceParser*>(this)->m_Parser = new h__SequenceParser;
241 Result_t result = m_Parser->OpenRead(file_list, pedantic);
243 if ( ASDCP_FAILURE(result) )
244 const_cast<ASDCP::JP2K::SequenceParser*>(this)->m_Parser.release();
250 // Rewinds the stream to the beginning.
252 ASDCP::JP2K::SequenceParser::Reset() const
254 if ( m_Parser.empty() )
257 return m_Parser->Reset();
260 // Places a frame of data in the frame buffer. Fails if the buffer is too small
261 // or the stream is empty.
263 ASDCP::JP2K::SequenceParser::ReadFrame(FrameBuffer& FB) const
265 if ( m_Parser.empty() )
268 return m_Parser->ReadFrame(FB);
273 ASDCP::JP2K::SequenceParser::FillPictureDescriptor(PictureDescriptor& PDesc) const
275 if ( m_Parser.empty() )
278 PDesc = m_Parser->m_PDesc;
284 // end JP2K_Sequence_Parser.cpp