2 Copyright (c) 2004-2006, John Hurst
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27 /*! \file Codestream_Parser.cpp
29 \brief AS-DCP library, JPEG 2000 codestream essence reader implementation
32 #include <KM_fileio.h>
37 using Kumu::DefaultLogSink;
39 //------------------------------------------------------------------------------------------
41 class ASDCP::JP2K::CodestreamParser::h__CodestreamParser
43 ASDCP_NO_COPY_CONSTRUCT(h__CodestreamParser);
46 PictureDescriptor m_PDesc;
47 Kumu::FileReader m_File;
51 memset(&m_PDesc, 0, sizeof(m_PDesc));
52 m_PDesc.EditRate = Rational(24,1);
53 m_PDesc.SampleRate = m_PDesc.EditRate;
56 ~h__CodestreamParser() {}
58 Result_t OpenReadFrame(const char* filename, FrameBuffer& FB)
60 ASDCP_TEST_NULL_STR(filename);
62 Result_t result = m_File.OpenRead(filename);
64 if ( ASDCP_SUCCESS(result) )
66 Kumu::fsize_t file_size = m_File.Size();
68 if ( FB.Capacity() < file_size )
70 DefaultLogSink().Error("FrameBuf.Capacity: %u frame length: %u\n", FB.Capacity(), (ui32_t)file_size);
71 return RESULT_SMALLBUF;
77 if ( ASDCP_SUCCESS(result) )
78 result = m_File.Read(FB.Data(), FB.Capacity(), &read_count);
80 if ( ASDCP_SUCCESS(result) )
83 if ( ASDCP_SUCCESS(result) )
87 const byte_t* p = FB.RoData();
88 const byte_t* end_p = p + FB.Size();
90 while ( p < end_p && ASDCP_SUCCESS(result) )
92 result = GetNextMarker(&p, NextMarker);
94 if ( ASDCP_FAILURE(result) )
96 result = RESULT_RAW_ESS;
100 fprintf(stderr, "%s Length: %u\n",
101 GetMarkerString(NextMarker.m_Type), NextMarker.m_DataSize);
104 switch ( NextMarker.m_Type )
107 FB.PlaintextOffset(p - FB.RoData());
113 Accessor::SIZ SIZ_(NextMarker);
114 m_PDesc.StoredWidth = SIZ_.Xsize();
115 m_PDesc.StoredHeight = SIZ_.Ysize();
116 m_PDesc.AspectRatio = Rational(SIZ_.Xsize(), SIZ_.Ysize());
117 m_PDesc.Rsize = SIZ_.Rsize();
118 m_PDesc.Xsize = SIZ_.Xsize();
119 m_PDesc.Ysize = SIZ_.Ysize();
120 m_PDesc.XOsize = SIZ_.XOsize();
121 m_PDesc.YOsize = SIZ_.YOsize();
122 m_PDesc.XTsize = SIZ_.XTsize();
123 m_PDesc.YTsize = SIZ_.YTsize();
124 m_PDesc.XTOsize = SIZ_.XTOsize();
125 m_PDesc.YTOsize = SIZ_.YTOsize();
126 m_PDesc.Csize = SIZ_.Csize();
128 if ( m_PDesc.Csize != 3 )
130 DefaultLogSink().Error("Unexpected number of components: %u\n", m_PDesc.Csize);
131 return RESULT_RAW_FORMAT;
134 for ( i = 0; i < m_PDesc.Csize; i++ )
135 SIZ_.ReadComponent(i, m_PDesc.ImageComponents[i]);
140 if ( NextMarker.m_DataSize > DefaultCodingDataLength )
142 DefaultLogSink().Error("Unexpectedly large CodingStyle data: %u\n", NextMarker.m_DataSize);
143 return RESULT_RAW_FORMAT;
146 m_PDesc.CodingStyleLength = NextMarker.m_DataSize;
147 memcpy(m_PDesc.CodingStyle, NextMarker.m_Data, m_PDesc.CodingStyleLength);
151 if ( NextMarker.m_DataSize > DefaultCodingDataLength )
153 DefaultLogSink().Error("Unexpectedly large QuantDefault data: %u\n", NextMarker.m_DataSize);
154 return RESULT_RAW_FORMAT;
157 m_PDesc.QuantDefaultLength = NextMarker.m_DataSize;
158 memcpy(m_PDesc.QuantDefault, NextMarker.m_Data, m_PDesc.QuantDefaultLength);
168 //------------------------------------------------------------------------------------------
170 ASDCP::JP2K::CodestreamParser::CodestreamParser()
174 ASDCP::JP2K::CodestreamParser::~CodestreamParser()
178 // Opens the stream for reading, parses enough data to provide a complete
179 // set of stream metadata for the MXFWriter below.
181 ASDCP::JP2K::CodestreamParser::OpenReadFrame(const char* filename, FrameBuffer& FB) const
183 const_cast<ASDCP::JP2K::CodestreamParser*>(this)->m_Parser = new h__CodestreamParser;
184 return m_Parser->OpenReadFrame(filename, FB);
189 ASDCP::JP2K::CodestreamParser::FillPictureDescriptor(PictureDescriptor& PDesc) const
191 if ( m_Parser.empty() )
194 PDesc = m_Parser->m_PDesc;
200 // end Codestream_Parser.cpp