Dirac - A Video Codec

Created by the British Broadcasting Corporation.


picture_byteio.h
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38
42#ifndef picture_byteio_h
43#define picture_byteio_h
44
45
46//LOCAL INCLUDES
47#include <libdirac_byteio/parseunit_byteio.h> // Parent class
48#include <libdirac_byteio/mvdata_byteio.h> // Contains mvdata streams
49#include <libdirac_byteio/transform_byteio.h> // Transform header
50
51// DIRAC includes
52#include <libdirac_common/common.h> // PictureType etc
53
54
55namespace dirac
56{
61 {
62 public:
63
70 int frame_num);
71
72
79 const ParseUnitByteIO& parseunit_byteio);
80
84 virtual ~PictureByteIO();
85
90 void CollateByteStats(DiracByteStats& dirac_byte_stats);
91
95 bool Input();
96
100 void Output();
101
102
103
104 const std::string GetBytes();
105
106 int GetSize() const;
107
112
116 int IsRef() const { return (GetParseCode()&0x0C)==0x0C;}
117
121 int IsNonRef() const { return (GetParseCode()&0x0C)==0x08;}
122
126 int NumRefs() const { return (GetParseCode()&0x03);}
127
131 bool IsIntra() const { return IsPicture() && (NumRefs()==0) ; }
132
136 bool IsInter() const { return IsPicture() && (NumRefs()>0) ; }
137
138 /***
139 * Sets the MVDataIO
140 */
141 void SetMvData(MvDataByteIO *mv_data) {m_mv_data = mv_data; }
142
143 /***
144 * Sets the TransformByteIo
145 */
146 void SetTransformData(TransformByteIO *transform_data) {m_transform_data = transform_data; }
147
148 protected:
149
150
151 private:
152
157 unsigned char CalcParseCode() const;
158
163
168
173
178
183
188
193
198
203
204 };
205
206} // namespace dirac
207
208#endif
Definition of class SequenceHeaderByteIO.
Definition accessunit_byteio.h:52
ParseUnitType
Definition parseunit_byteio.h:57
@ PU_PICTURE
Definition parseunit_byteio.h:59
Class DiracByteStats - for collecting statistics on aspects of the Dirac byte-stream.
Definition dirac_byte_stats.h:71
Represents compressed sequence-parameter data used in an AccessUnit.
Definition mvdata_byteio.h:60
unsigned char GetParseCode() const
Get parse code.
Definition parseunit_byteio.h:223
bool IsPicture() const
Returns true is parse unit is Picture data.
Definition parseunit_byteio.h:179
ParseUnitByteIO()
Constructor.
bool IsIntra() const
Returns true is picture is Intra picture.
Definition picture_byteio.h:131
PictureParams & m_frame_params
Picture parameters.
Definition picture_byteio.h:187
void InputRetiredPicture()
Reads retired picture number.
int GetSize() const
Gets size (in bytes)
ParseUnitType GetType() const
Gets parse-unit type.
Definition picture_byteio.h:111
MvDataByteIO * m_mv_data
MV data.
Definition picture_byteio.h:197
void SetPictureType()
Calculates picture-type (eg INTRA/INTER) of picture.
TransformByteIO * m_transform_data
Transform data.
Definition picture_byteio.h:202
int m_frame_num
Picture number.
Definition picture_byteio.h:192
void SetTransformData(TransformByteIO *transform_data)
Definition picture_byteio.h:146
const std::string GetBytes()
Gets string containing coded bytes.
bool IsInter() const
Returns true is picture is Inter picture.
Definition picture_byteio.h:136
unsigned char CalcParseCode() const
Calculates parse-code based on picture parameters.
void CollateByteStats(DiracByteStats &dirac_byte_stats)
Gathers byte stats on the picture data.
void Output()
Outputs picture values to Dirac stream-format.
int IsNonRef() const
Returns true is picture in Non-Reference picture.
Definition picture_byteio.h:121
bool Input()
Inputs data from Dirac stream-format.
PictureByteIO(PictureParams &frame_params, const ParseUnitByteIO &parseunit_byteio)
Constructor.
void SetMvData(MvDataByteIO *mv_data)
Definition picture_byteio.h:141
int NumRefs() const
Gets parse-unit type.
Definition picture_byteio.h:126
virtual ~PictureByteIO()
Destructor.
void InputReferencePictures()
Reads reference-picture data.
PictureByteIO(PictureParams &frame_params, int frame_num)
Constructor.
void SetEntropyCodingFlag()
Sets the entropy coding flag in the picture parameters.
void SetReferenceType()
Calculates reference-type of picture.
int IsRef() const
Returns true is picture in Reference picture.
Definition picture_byteio.h:116
Represents compressed sequence-parameter data used in an AccessUnit.
Definition transform_byteio.h:60
Parameters for initialising picture class objects.
Definition common.h:533

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