/*
-Copyright (c) 2011-2013, Robert Scheler, Heiko Sparenberg Fraunhofer IIS, John Hurst
+Copyright (c) 2011-2013, Robert Scheler, Heiko Sparenberg Fraunhofer IIS,
+John Hurst
+
All rights reserved.
Redistribution and use in source and binary forms, with or without
format, labeled IMF Essence Component (AKA "AS-02" for historical
reasons), is described in the following document:
- o SMPTE 2067-5:201X (draft at this time) IMF Essence Component
+ o SMPTE 2067-5:2013 IMF Essence Component
The following use cases are supported by the module:
PCM audio streams
o Read header metadata from an AS-02 file
+
+NOTE: ciphertext support for clip-wrapped PCM is not yet complete.
*/
#ifndef _AS_02_H_
#define _AS_02_H_
-#include "AS_DCP.h"
-#include "MXF.h"
-
+#include "Metadata.h"
-namespace ASDCP {
- namespace MXF {
- // #include<Metadata.h> to use this
- class OPAtomHeader;
- };
-};
namespace AS_02
{
using Kumu::Result_t;
+ KM_DECLARE_RESULT(AS02_FORMAT, -116, "The file format is not proper OP-1a/AS-02.");
+
namespace MXF {
//
+ // reads distributed index tables and provides a uniform lookup with
+ // translated StreamOffest values (that is, StreamOffest is adjusted
+ // to the actual file position
class AS02IndexReader : public ASDCP::MXF::Partition
{
Kumu::ByteString m_IndexSegmentData;
ui32_t m_Duration;
+ ui32_t m_BytesPerEditUnit;
- // ui32_t m_BytesPerEditUnit;
-
- Result_t InitFromBuffer(const byte_t* p, ui32_t l);
+ Result_t InitFromBuffer(const byte_t* p, ui32_t l, const ui64_t& body_offset, const ui64_t& essence_container_offset);
ASDCP_NO_COPY_CONSTRUCT(AS02IndexReader);
AS02IndexReader();
public:
const ASDCP::Dictionary*& m_Dict;
- Kumu::fpos_t m_ECOffset;
ASDCP::IPrimerLookup *m_Lookup;
AS02IndexReader(const ASDCP::Dictionary*&);
virtual ~AS02IndexReader();
- Result_t InitFromFile(const Kumu::FileReader& reader, const ASDCP::MXF::RIP& rip);
+ Result_t InitFromFile(const Kumu::FileReader& reader, const ASDCP::MXF::RIP& rip, const bool has_header_essence);
ui32_t GetDuration() const;
void Dump(FILE* = 0);
Result_t GetMDObjectByID(const Kumu::UUID&, ASDCP::MXF::InterchangeObject** = 0);
Result_t Lookup(ui32_t frame_num, ASDCP::MXF::IndexTableSegment::IndexEntry&) const;
};
+
+
+ // Returns size in bytes of a single sample of data described by ADesc
+ inline ui32_t CalcSampleSize(const ASDCP::MXF::WaveAudioDescriptor& d)
+ {
+ return (d.QuantizationBits / 8) * d.ChannelCount;
+ }
+
+ // Returns number of samples per frame of data described by ADesc
+ inline ui32_t CalcSamplesPerFrame(const ASDCP::MXF::WaveAudioDescriptor& d, const ASDCP::Rational& edit_rate)
+ {
+ double tmpd = d.AudioSamplingRate.Quotient() / edit_rate.Quotient();
+ return (ui32_t)ceil(tmpd);
+ }
+
+ // Returns the size in bytes of a frame of data described by ADesc
+ inline ui32_t CalcFrameBufferSize(const ASDCP::MXF::WaveAudioDescriptor& d, const ASDCP::Rational& edit_rate)
+ {
+ return CalcSampleSize(d) * CalcSamplesPerFrame(d, edit_rate);
+ }
+
} // namespace MXF
//---------------------------------------------------------------------------------
IS_LEAD,
IS_FOLLOW,
IS_FILE_SPECIFIC,
+ IS_MAX
};
namespace JP2K
// Open the file for writing. The file must not exist. Returns error if
// the operation cannot be completed or if nonsensical data is discovered
// in the essence descriptor.
- Result_t OpenWrite(const char* filename, const ASDCP::WriterInfo&,
- const ASDCP::JP2K::PictureDescriptor&,
- const IndexStrategy_t& Strategy = IS_FOLLOW,
- const ui32_t& PartitionSpace = 60, /* seconds per partition */
- const ui32_t& HeaderSize = 16384);
+ Result_t OpenWrite(const std::string& filename, const ASDCP::WriterInfo&,
+ ASDCP::MXF::FileDescriptor* essence_descriptor,
+ ASDCP::MXF::InterchangeObject_list_t& essence_sub_descriptor_list,
+ const ASDCP::Rational& edit_rate, const ui32_t& header_size = 16384,
+ const IndexStrategy_t& strategy = IS_FOLLOW, const ui32_t& partition_space = 10);
// Writes a frame of essence to the MXF file. If the optional AESEncContext
// argument is present, the essence is encrypted prior to writing.
// Open the file for reading. The file must exist. Returns error if the
// operation cannot be completed.
- Result_t OpenRead(const char* filename) const;
+ Result_t OpenRead(const std::string& filename) const;
// Returns RESULT_INIT if the file is not open.
Result_t Close() const;
- // Fill an AudioDescriptor struct with the values from the file's header.
- // Returns RESULT_INIT if the file is not open.
- Result_t FillPictureDescriptor(ASDCP::JP2K::PictureDescriptor&) const;
-
// Fill a WriterInfo struct with the values from the file's header.
// Returns RESULT_INIT if the file is not open.
Result_t FillWriterInfo(ASDCP::WriterInfo&) const;
{
// see AS_DCP.h for related data types
+ // An AS-02 PCM file is clip-wrapped, but the interface defined below mimics that used
+ // for frame-wrapped essence elsewhere in this library. The concept of frame rate
+ // therefore is only relevant to these classes and is not reflected in or affected by
+ // the contents of the MXF file. The frame rate that is set on the writer is only
+ // for compatibility with the existing parsers, samples are packed contiguously into
+ // the same clip-wrapped packet. Similarly, the edit rate must be set when initializing
+ // the reader to signal the number of samples to be read by each call to ReadFrame();
+
//
class MXFWriter
{
// Open the file for writing. The file must not exist. Returns error if
// the operation cannot be completed or if nonsensical data is discovered
// in the essence descriptor.
- Result_t OpenWrite(const char* filename, const ASDCP::WriterInfo&,
- const ASDCP::PCM::AudioDescriptor&, ui32_t HeaderSize = 16384);
+ Result_t OpenWrite(const std::string& filename, const ASDCP::WriterInfo&,
+ ASDCP::MXF::FileDescriptor* essence_descriptor,
+ ASDCP::MXF::InterchangeObject_list_t& essence_sub_descriptor_list,
+ const ASDCP::Rational& edit_rate, ui32_t HeaderSize = 16384);
// Writes a frame of essence to the MXF file. If the optional AESEncContext
// argument is present, the essence is encrypted prior to writing.
// Open the file for reading. The file must exist. Returns error if the
// operation cannot be completed.
- Result_t OpenRead(const char* filename) const;
+ Result_t OpenRead(const std::string& filename, const ASDCP::Rational& EditRate);
// Returns RESULT_INIT if the file is not open.
Result_t Close() const;
- // Fill an AudioDescriptor struct with the values from the file's header.
- // Returns RESULT_INIT if the file is not open.
- Result_t FillAudioDescriptor(ASDCP::PCM::AudioDescriptor&) const;
-
// Fill a WriterInfo struct with the values from the file's header.
// Returns RESULT_INIT if the file is not open.
Result_t FillWriterInfo(ASDCP::WriterInfo&) const;
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