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Added OPJ_LIMIT_DECODING enabling us to limit the decoding to main header

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Francois-Olivier Devaux
2007-02-19 09:59:29 +00:00
parent d084ff59f2
commit eac141b69a
5 changed files with 30 additions and 0 deletions
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16
libopenjpeg/openjpeg.h
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@@ -143,6 +143,14 @@ typedef enum CODEC_FORMAT {
CODEC_JP2 = 2 /**< JPEG-2000 file format : read/write */
} OPJ_CODEC_FORMAT;
/**
Limit decoding to certain portions of the codestream.
*/
typedef enum LIMIT_DECODING {
NO_LIMITATION = 0, /**< No limitation for the decoding. The entire codestream will de decoded */
LIMIT_TO_MAIN_HEADER = 1 /**< The decoding is limited to the Main Header */
} OPJ_LIMIT_DECODING;
/*
==========================================================
event manager typedef definitions
@@ -331,6 +339,14 @@ typedef struct opj_dparameters {
*/
int cp_layer;
/**
Specify whether the decoding should be done on the entire codestream, or be limited to the main header
Limiting the decoding to the main header makes it possible to extract the characteristics of the codestream
if == NO_LIMITATION, the entire codestream is decoded;
if == LIMIT_TO_MAIN_HEADER, only the main header is decoded;
*/
OPJ_LIMIT_DECODING cp_limit_decoding;
/**@name command line encoder parameters (not used inside the library) */
/*@{*/
/** input file name */