2 * Copyright (c) 2001-2003, David Janssens
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3 * Copyright (c) 2002-2003, Yannick Verschueren
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4 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
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5 * Copyright (c) 2005, Hervé Drolon, FreeImage Team
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6 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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7 * All rights reserved.
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9 * Redistribution and use in source and binary forms, with or without
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10 * modification, are permitted provided that the following conditions
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12 * 1. Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 * 2. Redistributions in binary form must reproduce the above copyright
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15 * notice, this list of conditions and the following disclaimer in the
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16 * documentation and/or other materials provided with the distribution.
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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28 * POSSIBILITY OF SUCH DAMAGE.
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34 @brief Implementation of a tile coder/decoder (TCD)
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36 The functions in TCD.C have for goal to encode or decode each tile independently from
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37 each other. The functions in TCD.C are used by some function in J2K.C.
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40 /** @defgroup TCD TCD - Implementation of a tile coder/decoder */
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44 FIXME: documentation
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46 typedef struct opj_tcd_seg {
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49 unsigned char *data;
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56 FIXME: documentation
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58 typedef struct opj_tcd_pass {
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60 double distortiondec;
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65 FIXME: documentation
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67 typedef struct opj_tcd_layer {
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68 int numpasses; /* Number of passes in the layer */
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69 int len; /* len of information */
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70 double disto; /* add for index (Cfr. Marcela) */
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71 unsigned char *data; /* data */
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75 FIXME: documentation
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77 typedef struct opj_tcd_cblk {
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78 int x0, y0, x1, y1; /* dimension of the code-blocks : left upper corner (x0, y0) right low corner (x1,y1) */
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81 int len; /* length */
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82 int numpasses; /* number of pass already done for the code-blocks */
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83 int numnewpasses; /* number of pass added to the code-blocks */
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84 int numsegs; /* number of segments */
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85 opj_tcd_seg_t segs[100]; /* segments informations */
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86 unsigned char data[8192]; /* Data */
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87 int numpassesinlayers; /* number of passes in the layer */
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88 opj_tcd_layer_t layers[100]; /* layer information */
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89 int totalpasses; /* total number of passes */
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90 opj_tcd_pass_t passes[100]; /* information about the passes */
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94 FIXME: documentation
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96 typedef struct opj_tcd_precinct {
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97 int x0, y0, x1, y1; /* dimension of the precinct : left upper corner (x0, y0) right low corner (x1,y1) */
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98 int cw, ch; /* number of precinct in width and heigth */
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99 opj_tcd_cblk_t *cblks; /* code-blocks informations */
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100 opj_tgt_tree_t *incltree; /* inclusion tree */
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101 opj_tgt_tree_t *imsbtree; /* IMSB tree */
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102 } opj_tcd_precinct_t;
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105 FIXME: documentation
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107 typedef struct opj_tcd_band {
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108 int x0, y0, x1, y1; /* dimension of the subband : left upper corner (x0, y0) right low corner (x1,y1) */
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110 opj_tcd_precinct_t *precincts; /* precinct information */
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116 FIXME: documentation
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118 typedef struct opj_tcd_resolution {
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119 int x0, y0, x1, y1; /* dimension of the resolution level : left upper corner (x0, y0) right low corner (x1,y1) */
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121 int numbands; /* number sub-band for the resolution level */
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122 opj_tcd_band_t bands[3]; /* subband information */
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123 } opj_tcd_resolution_t;
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126 FIXME: documentation
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128 typedef struct opj_tcd_tilecomp {
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129 int x0, y0, x1, y1; /* dimension of component : left upper corner (x0, y0) right low corner (x1,y1) */
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130 int numresolutions; /* number of resolutions level */
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131 opj_tcd_resolution_t *resolutions; /* resolutions information */
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132 int *data; /* data of the component */
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133 int nbpix; /* add fixed_quality */
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134 } opj_tcd_tilecomp_t;
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137 FIXME: documentation
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139 typedef struct opj_tcd_tile {
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140 int x0, y0, x1, y1; /* dimension of the tile : left upper corner (x0, y0) right low corner (x1,y1) */
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141 int numcomps; /* number of components in tile */
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142 opj_tcd_tilecomp_t *comps; /* Components information */
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143 int nbpix; /* add fixed_quality */
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144 double distotile; /* add fixed_quality */
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145 double distolayer[100]; /* add fixed_quality */
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149 FIXME: documentation
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151 typedef struct opj_tcd_image {
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152 int tw, th; /* number of tiles in width and heigth */
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153 opj_tcd_tile_t *tiles; /* Tiles information */
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159 typedef struct opj_tcd {
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160 /** codec context */
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161 opj_common_ptr cinfo;
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163 /** info on each image tile */
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164 opj_tcd_image_t *tcd_image;
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166 opj_image_t *image;
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167 /** coding parameters */
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169 /** pointer to the current encoded/decoded tile */
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170 opj_tcd_tile_t *tcd_tile;
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171 /** coding/decoding parameters common to all tiles */
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173 /** current encoded/decoded tile */
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175 /**@name working variables */
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177 opj_tcd_tile_t *tile;
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178 opj_tcd_tilecomp_t *tilec;
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179 opj_tcd_resolution_t *res;
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180 opj_tcd_band_t *band;
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181 opj_tcd_precinct_t *prc;
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182 opj_tcd_cblk_t *cblk;
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186 /** @name Exported functions */
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188 /* ----------------------------------------------------------------------- */
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191 Dump the content of a tcd structure
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193 void tcd_dump(FILE *fd, opj_tcd_t *tcd, opj_tcd_image_t *img);
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195 Create a new TCD handle
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196 @param cinfo Codec context info
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197 @return Returns a new TCD handle if successful returns NULL otherwise
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199 opj_tcd_t* tcd_create(opj_common_ptr cinfo);
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201 Destroy a previously created TCD handle
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202 @param tcd TCD handle to destroy
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204 void tcd_destroy(opj_tcd_t *tcd);
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206 Initialize the tile coder (allocate the memory)
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207 @param tcd TCD handle
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208 @param image Raw image
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209 @param cp Coding parameters
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210 @param curtileno Number that identifies the tile that will be encoded
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212 void tcd_malloc_encode(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp, int curtileno);
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214 Free the memory allocated for encoding
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215 @param tcd TCD handle
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217 void tcd_free_encode(opj_tcd_t *tcd);
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219 Initialize the tile coder (reuses the memory allocated by tcd_malloc_encode)
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220 @param tcd TCD handle
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221 @param image Raw image
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222 @param cp Coding parameters
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223 @param curtileno Number that identifies the tile that will be encoded
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225 void tcd_init_encode(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp, int curtileno);
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227 Initialize the tile decoder
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228 @param tcd TCD handle
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229 @param image Raw image
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230 @param cp Coding parameters
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232 void tcd_malloc_decode(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp);
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233 void tcd_makelayer_fixed(opj_tcd_t *tcd, int layno, int final);
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234 void tcd_rateallocate_fixed(opj_tcd_t *tcd);
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235 void tcd_makelayer(opj_tcd_t *tcd, int layno, double thresh, int final);
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236 bool tcd_rateallocate(opj_tcd_t *tcd, unsigned char *dest, int len, opj_image_info_t * image_info);
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238 Encode a tile from the raw image into a buffer
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239 @param tcd TCD handle
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240 @param tileno Number that identifies one of the tiles to be encoded
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241 @param dest Destination buffer
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242 @param len Length of destination buffer
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243 @param image_info Creation of index file
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246 int tcd_encode_tile(opj_tcd_t *tcd, int tileno, unsigned char *dest, int len, opj_image_info_t * image_info);
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248 Decode a tile from a buffer into a raw image
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249 @param tcd TCD handle
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250 @param src Source buffer
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251 @param len Length of source buffer
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252 @param tileno Number that identifies one of the tiles to be decoded
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254 bool tcd_decode_tile(opj_tcd_t *tcd, unsigned char *src, int len, int tileno);
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256 Free the memory allocated for decoding
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257 @param tcd TCD handle
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259 void tcd_free_decode(opj_tcd_t *tcd);
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261 /* ----------------------------------------------------------------------- */
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266 #endif /* __TCD_H */
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