+++ /dev/null
-/*
-Copyright (c) 2004-2012, John Hurst
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-3. The name of the author may not be used to endorse or promote products
- derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
-INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-/*! \file AS_DCP_MPEG2.cpp
- \version $Id: AS_DCP_MPEG2.cpp,v 1.34 2012/02/07 18:54:24 jhurst Exp $
- \brief AS-DCP library, MPEG2 essence reader and writer implementation
-*/
-
-#include "AS_DCP_internal.h"
-#include <iostream>
-#include <iomanip>
-
-
-//------------------------------------------------------------------------------------------
-
-static std::string MPEG_PACKAGE_LABEL = "File Package: SMPTE 381M frame wrapping of MPEG2 video elementary stream";
-static std::string PICT_DEF_LABEL = "Picture Track";
-
-//
-ASDCP::Result_t
-MD_to_MPEG2_VDesc(MXF::MPEG2VideoDescriptor* VDescObj, MPEG2::VideoDescriptor& VDesc)
-{
- ASDCP_TEST_NULL(VDescObj);
-
- VDesc.SampleRate = VDescObj->SampleRate;
- VDesc.EditRate = VDescObj->SampleRate;
- VDesc.FrameRate = VDescObj->SampleRate.Numerator;
- assert(VDescObj->ContainerDuration <= 0xFFFFFFFFL);
- VDesc.ContainerDuration = (ui32_t) VDescObj->ContainerDuration;
-
- VDesc.FrameLayout = VDescObj->FrameLayout;
- VDesc.StoredWidth = VDescObj->StoredWidth;
- VDesc.StoredHeight = VDescObj->StoredHeight;
- VDesc.AspectRatio = VDescObj->AspectRatio;
-
- VDesc.ComponentDepth = VDescObj->ComponentDepth;
- VDesc.HorizontalSubsampling = VDescObj->HorizontalSubsampling;
- VDesc.VerticalSubsampling = VDescObj->VerticalSubsampling;
- VDesc.ColorSiting = VDescObj->ColorSiting;
- VDesc.CodedContentType = VDescObj->CodedContentType;
-
- VDesc.LowDelay = VDescObj->LowDelay == 0 ? false : true;
- VDesc.BitRate = VDescObj->BitRate;
- VDesc.ProfileAndLevel = VDescObj->ProfileAndLevel;
- return RESULT_OK;
-}
-
-
-//
-ASDCP::Result_t
-MPEG2_VDesc_to_MD(MPEG2::VideoDescriptor& VDesc, MXF::MPEG2VideoDescriptor* VDescObj)
-{
- ASDCP_TEST_NULL(VDescObj);
-
- VDescObj->SampleRate = VDesc.SampleRate;
- VDescObj->ContainerDuration = VDesc.ContainerDuration;
-
- VDescObj->FrameLayout = VDesc.FrameLayout;
- VDescObj->StoredWidth = VDesc.StoredWidth;
- VDescObj->StoredHeight = VDesc.StoredHeight;
- VDescObj->AspectRatio = VDesc.AspectRatio;
-
- VDescObj->ComponentDepth = VDesc.ComponentDepth;
- VDescObj->HorizontalSubsampling = VDesc.HorizontalSubsampling;
- VDescObj->VerticalSubsampling = VDesc.VerticalSubsampling;
- VDescObj->ColorSiting = VDesc.ColorSiting;
- VDescObj->CodedContentType = VDesc.CodedContentType;
-
- VDescObj->LowDelay = VDesc.LowDelay ? 1 : 0;
- VDescObj->BitRate = VDesc.BitRate;
- VDescObj->ProfileAndLevel = VDesc.ProfileAndLevel;
- return RESULT_OK;
-}
-
-//
-std::ostream&
-ASDCP::MPEG2::operator << (std::ostream& strm, const VideoDescriptor& VDesc)
-{
- strm << " SampleRate: " << VDesc.SampleRate.Numerator << "/" << VDesc.SampleRate.Denominator << std::endl;
- strm << " FrameLayout: " << (unsigned) VDesc.FrameLayout << std::endl;
- strm << " StoredWidth: " << (unsigned) VDesc.StoredWidth << std::endl;
- strm << " StoredHeight: " << (unsigned) VDesc.StoredHeight << std::endl;
- strm << " AspectRatio: " << VDesc.AspectRatio.Numerator << "/" << VDesc.AspectRatio.Denominator << std::endl;
- strm << " ComponentDepth: " << (unsigned) VDesc.ComponentDepth << std::endl;
- strm << " HorizontalSubsmpl: " << (unsigned) VDesc.HorizontalSubsampling << std::endl;
- strm << " VerticalSubsmpl: " << (unsigned) VDesc.VerticalSubsampling << std::endl;
- strm << " ColorSiting: " << (unsigned) VDesc.ColorSiting << std::endl;
- strm << " CodedContentType: " << (unsigned) VDesc.CodedContentType << std::endl;
- strm << " LowDelay: " << (unsigned) VDesc.LowDelay << std::endl;
- strm << " BitRate: " << (unsigned) VDesc.BitRate << std::endl;
- strm << " ProfileAndLevel: " << (unsigned) VDesc.ProfileAndLevel << std::endl;
- strm << " ContainerDuration: " << (unsigned) VDesc.ContainerDuration << std::endl;
-
- return strm;
-}
-
-//
-void
-ASDCP::MPEG2::VideoDescriptorDump(const VideoDescriptor& VDesc, FILE* stream)
-{
- if ( stream == 0 )
- stream = stderr;
-
- fprintf(stream, "\
- SampleRate: %d/%d\n\
- FrameLayout: %u\n\
- StoredWidth: %u\n\
- StoredHeight: %u\n\
- AspectRatio: %d/%d\n\
- ComponentDepth: %u\n\
- HorizontalSubsmpl: %u\n\
- VerticalSubsmpl: %u\n\
- ColorSiting: %u\n\
- CodedContentType: %u\n\
- LowDelay: %u\n\
- BitRate: %u\n\
- ProfileAndLevel: %u\n\
- ContainerDuration: %u\n",
- VDesc.SampleRate.Numerator ,VDesc.SampleRate.Denominator,
- VDesc.FrameLayout,
- VDesc.StoredWidth,
- VDesc.StoredHeight,
- VDesc.AspectRatio.Numerator ,VDesc.AspectRatio.Denominator,
- VDesc.ComponentDepth,
- VDesc.HorizontalSubsampling,
- VDesc.VerticalSubsampling,
- VDesc.ColorSiting,
- VDesc.CodedContentType,
- VDesc.LowDelay,
- VDesc.BitRate,
- VDesc.ProfileAndLevel,
- VDesc.ContainerDuration
- );
-}
-
-//------------------------------------------------------------------------------------------
-//
-// hidden, internal implementation of MPEG2 reader
-
-class ASDCP::MPEG2::MXFReader::h__Reader : public ASDCP::h__Reader
-{
- ASDCP_NO_COPY_CONSTRUCT(h__Reader);
- h__Reader();
-
-public:
- VideoDescriptor m_VDesc; // video parameter list
-
- h__Reader(const Dictionary& d) : ASDCP::h__Reader(d) {}
- ~h__Reader() {}
- Result_t OpenRead(const char*);
- Result_t ReadFrame(ui32_t, FrameBuffer&, AESDecContext*, HMACContext*);
- Result_t ReadFrameGOPStart(ui32_t, FrameBuffer&, AESDecContext*, HMACContext*);
- Result_t FindFrameGOPStart(ui32_t, ui32_t&);
- Result_t FrameType(ui32_t FrameNum, FrameType_t& type);
-};
-
-
-//
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::h__Reader::OpenRead(const char* filename)
-{
- Result_t result = OpenMXFRead(filename);
-
- if( ASDCP_SUCCESS(result) )
- {
- InterchangeObject* Object;
- if ( ASDCP_SUCCESS(m_HeaderPart.GetMDObjectByType(OBJ_TYPE_ARGS(MPEG2VideoDescriptor), &Object)) )
- {
- assert(Object);
- result = MD_to_MPEG2_VDesc((MXF::MPEG2VideoDescriptor*)Object, m_VDesc);
- }
- }
-
- if( ASDCP_SUCCESS(result) )
- result = InitMXFIndex();
-
- if( ASDCP_SUCCESS(result) )
- result = InitInfo();
-
- return result;
-}
-
-
-//
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::h__Reader::ReadFrameGOPStart(ui32_t FrameNum, FrameBuffer& FrameBuf,
- AESDecContext* Ctx, HMACContext* HMAC)
-{
- ui32_t KeyFrameNum;
-
- Result_t result = FindFrameGOPStart(FrameNum, KeyFrameNum);
-
- if ( ASDCP_SUCCESS(result) )
- result = ReadFrame(KeyFrameNum, FrameBuf, Ctx, HMAC);
-
- return result;
-}
-
-
-//
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::h__Reader::FindFrameGOPStart(ui32_t FrameNum, ui32_t& KeyFrameNum)
-{
- KeyFrameNum = 0;
-
- if ( ! m_File.IsOpen() )
- return RESULT_INIT;
-
- // look up frame index node
- IndexTableSegment::IndexEntry TmpEntry;
-
- if ( ASDCP_FAILURE(m_FooterPart.Lookup(FrameNum, TmpEntry)) )
- {
- DefaultLogSink().Error("Frame value out of range: %u\n", FrameNum);
- return RESULT_RANGE;
- }
-
- KeyFrameNum = FrameNum - TmpEntry.KeyFrameOffset;
-
- return RESULT_OK;
-}
-
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::h__Reader::FrameType(ui32_t FrameNum, FrameType_t& type)
-{
- if ( ! m_File.IsOpen() )
- return RESULT_INIT;
-
- // look up frame index node
- IndexTableSegment::IndexEntry TmpEntry;
-
- if ( ASDCP_FAILURE(m_FooterPart.Lookup(FrameNum, TmpEntry)) )
- {
- DefaultLogSink().Error("Frame value out of range: %u\n", FrameNum);
- return RESULT_RANGE;
- }
-
- type = ( (TmpEntry.Flags & 0x0f) == 3 ) ? FRAME_B : ( (TmpEntry.Flags & 0x0f) == 2 ) ? FRAME_P : FRAME_I;
- return RESULT_OK;
-}
-
-
-//
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::h__Reader::ReadFrame(ui32_t FrameNum, FrameBuffer& FrameBuf,
- AESDecContext* Ctx, HMACContext* HMAC)
-{
- assert(m_Dict);
- if ( ! m_File.IsOpen() )
- return RESULT_INIT;
-
- Result_t result = ReadEKLVFrame(FrameNum, FrameBuf, m_Dict->ul(MDD_MPEG2Essence), Ctx, HMAC);
-
- if ( ASDCP_FAILURE(result) )
- return result;
-
- IndexTableSegment::IndexEntry TmpEntry;
- m_FooterPart.Lookup(FrameNum, TmpEntry);
-
- switch ( ( TmpEntry.Flags >> 4 ) & 0x03 )
- {
- case 0: FrameBuf.FrameType(FRAME_I); break;
- case 2: FrameBuf.FrameType(FRAME_P); break;
- case 3: FrameBuf.FrameType(FRAME_B); break;
- default: FrameBuf.FrameType(FRAME_U);
- }
-
- FrameBuf.TemporalOffset(TmpEntry.TemporalOffset);
- FrameBuf.GOPStart(TmpEntry.Flags & 0x40 ? true : false);
- FrameBuf.ClosedGOP(TmpEntry.Flags & 0x80 ? true : false);
-
- return RESULT_OK;
-}
-
-//------------------------------------------------------------------------------------------
-
-
-//
-void
-ASDCP::MPEG2::FrameBuffer::Dump(FILE* stream, ui32_t dump_len) const
-{
- if ( stream == 0 )
- stream = stderr;
-
- fprintf(stream, "Frame: %06u, %c%-2hu, %7u bytes",
- m_FrameNumber, FrameTypeChar(m_FrameType), m_TemporalOffset, m_Size);
-
- if ( m_GOPStart )
- fprintf(stream, " (start %s GOP)", ( m_ClosedGOP ? "closed" : "open"));
-
- fputc('\n', stream);
-
- if ( dump_len > 0 )
- Kumu::hexdump(m_Data, dump_len, stream);
-}
-
-
-//------------------------------------------------------------------------------------------
-
-ASDCP::MPEG2::MXFReader::MXFReader()
-{
- m_Reader = new h__Reader(DefaultCompositeDict());
-}
-
-
-ASDCP::MPEG2::MXFReader::~MXFReader()
-{
-}
-
-// Warning: direct manipulation of MXF structures can interfere
-// with the normal operation of the wrapper. Caveat emptor!
-//
-ASDCP::MXF::OPAtomHeader&
-ASDCP::MPEG2::MXFReader::OPAtomHeader()
-{
- if ( m_Reader.empty() )
- {
- assert(g_OPAtomHeader);
- return *g_OPAtomHeader;
- }
-
- return m_Reader->m_HeaderPart;
-}
-
-// Warning: direct manipulation of MXF structures can interfere
-// with the normal operation of the wrapper. Caveat emptor!
-//
-ASDCP::MXF::OPAtomIndexFooter&
-ASDCP::MPEG2::MXFReader::OPAtomIndexFooter()
-{
- if ( m_Reader.empty() )
- {
- assert(g_OPAtomIndexFooter);
- return *g_OPAtomIndexFooter;
- }
-
- return m_Reader->m_FooterPart;
-}
-
-// Open the file for reading. The file must exist. Returns error if the
-// operation cannot be completed.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::OpenRead(const char* filename) const
-{
- return m_Reader->OpenRead(filename);
-}
-
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::ReadFrame(ui32_t FrameNum, FrameBuffer& FrameBuf,
- AESDecContext* Ctx, HMACContext* HMAC) const
-{
- if ( m_Reader && m_Reader->m_File.IsOpen() )
- return m_Reader->ReadFrame(FrameNum, FrameBuf, Ctx, HMAC);
-
- return RESULT_INIT;
-}
-
-
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::ReadFrameGOPStart(ui32_t FrameNum, FrameBuffer& FrameBuf,
- AESDecContext* Ctx, HMACContext* HMAC) const
-{
- if ( m_Reader && m_Reader->m_File.IsOpen() )
- return m_Reader->ReadFrameGOPStart(FrameNum, FrameBuf, Ctx, HMAC);
-
- return RESULT_INIT;
-}
-
-
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::FindFrameGOPStart(ui32_t FrameNum, ui32_t& KeyFrameNum) const
-{
- if ( m_Reader && m_Reader->m_File.IsOpen() )
- return m_Reader->FindFrameGOPStart(FrameNum, KeyFrameNum);
-
- return RESULT_INIT;
-}
-
-
-// Fill the struct with the values from the file's header.
-// Returns RESULT_INIT if the file is not open.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::FillVideoDescriptor(VideoDescriptor& VDesc) const
-{
- if ( m_Reader && m_Reader->m_File.IsOpen() )
- {
- VDesc = m_Reader->m_VDesc;
- return RESULT_OK;
- }
-
- return RESULT_INIT;
-}
-
-
-// Fill the struct with the values from the file's header.
-// Returns RESULT_INIT if the file is not open.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::FillWriterInfo(WriterInfo& Info) const
-{
- if ( m_Reader && m_Reader->m_File.IsOpen() )
- {
- Info = m_Reader->m_Info;
- return RESULT_OK;
- }
-
- return RESULT_INIT;
-}
-
-//
-void
-ASDCP::MPEG2::MXFReader::DumpHeaderMetadata(FILE* stream) const
-{
- if ( m_Reader->m_File.IsOpen() )
- m_Reader->m_HeaderPart.Dump(stream);
-}
-
-
-//
-void
-ASDCP::MPEG2::MXFReader::DumpIndex(FILE* stream) const
-{
- if ( m_Reader->m_File.IsOpen() )
- m_Reader->m_FooterPart.Dump(stream);
-}
-
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::Close() const
-{
- if ( m_Reader && m_Reader->m_File.IsOpen() )
- {
- m_Reader->Close();
- return RESULT_OK;
- }
-
- return RESULT_INIT;
-}
-
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFReader::FrameType(ui32_t FrameNum, FrameType_t& type) const
-{
- if ( ! m_Reader )
- return RESULT_INIT;
-
- return m_Reader->FrameType(FrameNum, type);
-}
-
-
-//------------------------------------------------------------------------------------------
-
-//
-class ASDCP::MPEG2::MXFWriter::h__Writer : public ASDCP::h__Writer
-{
- ASDCP_NO_COPY_CONSTRUCT(h__Writer);
- h__Writer();
-
-public:
- VideoDescriptor m_VDesc;
- ui32_t m_GOPOffset;
- byte_t m_EssenceUL[SMPTE_UL_LENGTH];
-
- h__Writer(const Dictionary& d) : ASDCP::h__Writer(d), m_GOPOffset(0) {
- memset(m_EssenceUL, 0, SMPTE_UL_LENGTH);
- }
-
- ~h__Writer(){}
-
- Result_t OpenWrite(const char*, ui32_t HeaderSize);
- Result_t SetSourceStream(const VideoDescriptor&);
- Result_t WriteFrame(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);
- Result_t Finalize();
-};
-
-
-// Open the file for writing. The file must not exist. Returns error if
-// the operation cannot be completed.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::h__Writer::OpenWrite(const char* filename, ui32_t HeaderSize)
-{
- if ( ! m_State.Test_BEGIN() )
- return RESULT_STATE;
-
- Result_t result = m_File.OpenWrite(filename);
-
- if ( ASDCP_SUCCESS(result) )
- {
- m_HeaderSize = HeaderSize;
- m_EssenceDescriptor = new MPEG2VideoDescriptor(m_Dict);
- result = m_State.Goto_INIT();
- }
-
- return result;
-}
-
-// Automatically sets the MXF file's metadata from the MPEG stream.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::h__Writer::SetSourceStream(const VideoDescriptor& VDesc)
-{
- assert(m_Dict);
- if ( ! m_State.Test_INIT() )
- return RESULT_STATE;
-
- m_VDesc = VDesc;
- Result_t result = MPEG2_VDesc_to_MD(m_VDesc, (MPEG2VideoDescriptor*)m_EssenceDescriptor);
-
- if ( ASDCP_SUCCESS(result) )
- {
- memcpy(m_EssenceUL, m_Dict->ul(MDD_MPEG2Essence), SMPTE_UL_LENGTH);
- m_EssenceUL[SMPTE_UL_LENGTH-1] = 1; // first (and only) essence container
- result = m_State.Goto_READY();
- }
-
- if ( ASDCP_SUCCESS(result) )
- {
- ui32_t TCFrameRate = ( m_VDesc.EditRate == EditRate_23_98 ) ? 24 : m_VDesc.EditRate.Numerator;
-
- result = WriteMXFHeader(MPEG_PACKAGE_LABEL, UL(m_Dict->ul(MDD_MPEG2_VESWrapping)),
- PICT_DEF_LABEL, UL(m_EssenceUL), UL(m_Dict->ul(MDD_PictureDataDef)),
- m_VDesc.EditRate, TCFrameRate);
- }
-
- return result;
-}
-
-// Writes a frame of essence to the MXF file. If the optional AESEncContext
-// argument is present, the essence is encrypted prior to writing.
-// Fails if the file is not open, is finalized, or an operating system
-// error occurs.
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::h__Writer::WriteFrame(const FrameBuffer& FrameBuf, AESEncContext* Ctx,
- HMACContext* HMAC)
-{
- Result_t result = RESULT_OK;
-
- if ( m_State.Test_READY() )
- result = m_State.Goto_RUNNING(); // first time through, get the body location
-
- IndexTableSegment::IndexEntry Entry;
- Entry.StreamOffset = m_StreamOffset;
-
- if ( ASDCP_SUCCESS(result) )
- result = WriteEKLVPacket(FrameBuf, m_EssenceUL, Ctx, HMAC);
-
- if ( ASDCP_FAILURE(result) )
- return result;
-
- // create mxflib flags
- int Flags = 0;
-
- switch ( FrameBuf.FrameType() )
- {
- case FRAME_I: Flags = 0x00; break;
- case FRAME_P: Flags = 0x22; break;
- case FRAME_B: Flags = 0x33; break;
- /* Keep gcc quiet */
- case FRAME_U: break;
- }
-
- if ( FrameBuf.GOPStart() )
- {
- m_GOPOffset = 0;
- Flags |= 0x40;
-
- if ( FrameBuf.ClosedGOP() )
- Flags |= 0x80;
- }
-
- // update the index manager
- Entry.TemporalOffset = - FrameBuf.TemporalOffset();
- Entry.KeyFrameOffset = 0 - m_GOPOffset;
- Entry.Flags = Flags;
- /*
- fprintf(stderr, "to: %4hd ko: %4hd c1: %4hd c2: %4hd fl: 0x%02x\n",
- Entry.TemporalOffset, Entry.KeyFrameOffset,
- m_GOPOffset + Entry.TemporalOffset,
- Entry.KeyFrameOffset - Entry.TemporalOffset,
- Entry.Flags);
- */
- m_FooterPart.PushIndexEntry(Entry);
- m_FramesWritten++;
- m_GOPOffset++;
-
- return RESULT_OK;
-}
-
-
-// Closes the MXF file, writing the index and other closing information.
-//
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::h__Writer::Finalize()
-{
- if ( ! m_State.Test_RUNNING() )
- return RESULT_STATE;
-
- m_State.Goto_FINAL();
-
- return WriteMXFFooter();
-}
-
-
-//------------------------------------------------------------------------------------------
-
-
-
-ASDCP::MPEG2::MXFWriter::MXFWriter()
-{
-}
-
-ASDCP::MPEG2::MXFWriter::~MXFWriter()
-{
-}
-
-// Warning: direct manipulation of MXF structures can interfere
-// with the normal operation of the wrapper. Caveat emptor!
-//
-ASDCP::MXF::OPAtomHeader&
-ASDCP::MPEG2::MXFWriter::OPAtomHeader()
-{
- if ( m_Writer.empty() )
- {
- assert(g_OPAtomHeader);
- return *g_OPAtomHeader;
- }
-
- return m_Writer->m_HeaderPart;
-}
-
-// Warning: direct manipulation of MXF structures can interfere
-// with the normal operation of the wrapper. Caveat emptor!
-//
-ASDCP::MXF::OPAtomIndexFooter&
-ASDCP::MPEG2::MXFWriter::OPAtomIndexFooter()
-{
- if ( m_Writer.empty() )
- {
- assert(g_OPAtomIndexFooter);
- return *g_OPAtomIndexFooter;
- }
-
- return m_Writer->m_FooterPart;
-}
-
-// Open the file for writing. The file must not exist. Returns error if
-// the operation cannot be completed.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::OpenWrite(const char* filename, const WriterInfo& Info,
- const VideoDescriptor& VDesc, ui32_t HeaderSize)
-{
- if ( Info.LabelSetType == LS_MXF_SMPTE )
- m_Writer = new h__Writer(DefaultSMPTEDict());
- else
- m_Writer = new h__Writer(DefaultInteropDict());
-
- m_Writer->m_Info = Info;
-
- Result_t result = m_Writer->OpenWrite(filename, HeaderSize);
-
- if ( ASDCP_SUCCESS(result) )
- result = m_Writer->SetSourceStream(VDesc);
-
- if ( ASDCP_FAILURE(result) )
- m_Writer.release();
-
- return result;
-}
-
-
-// Writes a frame of essence to the MXF file. If the optional AESEncContext
-// argument is present, the essence is encrypted prior to writing.
-// Fails if the file is not open, is finalized, or an operating system
-// error occurs.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::WriteFrame(const FrameBuffer& FrameBuf, AESEncContext* Ctx, HMACContext* HMAC)
-{
- if ( m_Writer.empty() )
- return RESULT_INIT;
-
- return m_Writer->WriteFrame(FrameBuf, Ctx, HMAC);
-}
-
-// Closes the MXF file, writing the index and other closing information.
-ASDCP::Result_t
-ASDCP::MPEG2::MXFWriter::Finalize()
-{
- if ( m_Writer.empty() )
- return RESULT_INIT;
-
- return m_Writer->Finalize();
-}
-
-
-//
-// end AS_DCP_MPEG2.cpp
-//
projects / libdcp.git / blobdiff