| Property | Type | Description | |
|---|---|---|---|
| pktDec |
| Method | Description | |
|---|---|---|
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FileBitstreamReaderAgent ( |
Reads all tiles headers and keep offset of their first packet. Finally it calls the rate allocation method.
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| getCodeBlock ( int c, int m, int n, CSJ2K.j2k.wavelet.synthesis.SubbandSyn sb, int fl, int nl, CSJ2K.j2k.entropy.decoder.DecLyrdCBlk ccb ) : CSJ2K.j2k.entropy.decoder.DecLyrdCBlk |
Returns the specified coded code-block, for the specified component, in the current tile. The first layer to return is indicated by 'fl'. The number of layers that is returned depends on 'nl' and the amount of available data. The argument 'fl' is to be used by subsequent calls to this method for the same code-block. In this way supplemental data can be retrieved at a later time. The fact that data from more than one layer can be returned means that several packets from the same code-block, of the same component, and the same tile, have been concatenated. The returned compressed code-block can have its progressive attribute set. If this attribute is set it means that more data can be obtained by subsequent calls to this method (subject to transmission delays, etc). If the progressive attribute is not set it means that the returned data is all the data that can be obtained for the specified code-block. The compressed code-block is uniquely specified by the current tile, the component (identified by 'c'), the subband (indentified by 'sb') and the code-block vertical and horizontal indexes 'n' and 'm'. The 'ulx' and 'uly' members of the returned 'DecLyrdCBlk' object contain the coordinates of the top-left corner of the block, with respect to the tile, not the subband.
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| getNumTileParts ( int t ) : int |
Returns the number of tile-part found for a given tile
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| nextTile ( ) : void |
Advances to the next tile, in standard scan-line order (by rows then columns). A NoNextElementException is thrown if the current tile is the last one (i.e. there is no next tile).
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| setTile ( int x, int y ) : void |
Changes the current tile, given the new indexes. An IllegalArgumentException is thrown if the indexes do not correspond to a valid tile.
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| Method | Description | |
|---|---|---|
| allocateRate ( ) : void |
Allocates output bit-rate for each tile in parsing mode: The allocator simulates the truncation of a virtual layer-resolution progressive codestream.
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| readCompPosResLy ( int lys, int lye, int ress, int rese, int comps, int compe ) : bool |
Reads packets of the current tile according to the component-position-resolution-layer progressiveness.
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| readLyResCompPos ( int lys, int lye, int ress, int rese, int comps, int compe ) : bool |
Reads packets of the current tile according to the layer-resolution-component-position progressiveness.
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| readPosCompResLy ( int lys, int lye, int ress, int rese, int comps, int compe ) : bool |
Reads packets of the current tile according to the position-component-resolution-layer progressiveness.
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| readResLyCompPos ( int lys, int lye, int ress, int rese, int comps, int compe ) : bool |
Reads packets of the current tile according to the resolution-layer-component-position progressiveness.
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| readResPosCompLy ( int lys, int lye, int ress, int rese, int comps, int compe ) : bool |
Reads packets of the current tile according to the resolution-position-component-layer progressiveness.
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| readTilePartHeader ( ) : int |
Reads SOT marker segment of the tile-part header and calls related methods of the HeaderDecoder to read other markers segments. The tile-part header is entirely read when a SOD marker is encountered.
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| readTilePkts ( int t ) : void |
Finish initialization of members for specified tile, reads packets head of each tile and keeps location of each code-block's codewords. The last 2 tasks are done by calling specific methods of PktDecoder. Then, if a parsing output rate is defined, it keeps information of first layers only. This operation simulates a creation of a layer-resolution-component progressive bit-stream which will be next truncated and decoded.
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public FileBitstreamReaderAgent ( |
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| hd | HeaderDecoder of the codestream. /// /// | |
| ehs | RandomAccessIO | The input stream where to read bit-stream. /// /// |
| decSpec | The decoder specifications /// /// | |
| pl | CSJ2K.j2k.util.ParameterList | The ParameterList instance created from the /// command-line arguments. /// /// |
| cdstrInfo | bool | Whether or not to print information found in /// codestream. /// /// |
| hi | ||
| return | System | |
| public getCodeBlock ( int c, int m, int n, CSJ2K.j2k.wavelet.synthesis.SubbandSyn sb, int fl, int nl, CSJ2K.j2k.entropy.decoder.DecLyrdCBlk ccb ) : CSJ2K.j2k.entropy.decoder.DecLyrdCBlk | ||
| c | int | The index of the component, from 0 to N-1. /// /// |
| m | int | The vertical index of the code-block to return, in the /// specified subband. /// /// |
| n | int | The horizontal index of the code-block to return, in the /// specified subband. /// /// |
| sb | CSJ2K.j2k.wavelet.synthesis.SubbandSyn | The subband in whic the requested code-block is. /// /// |
| fl | int | The first layer to return. /// /// |
| nl | int | The number of layers to return, if negative all available /// layers are returned, starting at 'fl'. /// /// |
| ccb | CSJ2K.j2k.entropy.decoder.DecLyrdCBlk | If not null this object is used to return the compressed /// code-block. If null a new object is created and returned. If the data /// array in ccb is not null then it can be reused to return the compressed /// data. /// /// |
| return | CSJ2K.j2k.entropy.decoder.DecLyrdCBlk | |
| public getNumTileParts ( int t ) : int | ||
| t | int | Tile index /// /// /// |
| return | int | |
| public setTile ( int x, int y ) : void | ||
| x | int | The horizontal indexes the tile. /// /// |
| y | int | The vertical indexes of the new tile. /// /// |
| return | void | |
