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openjpeg/libopenjpeg/openjpeg.c

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/*
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef _WIN32
#include <windows.h>
#endif /* _WIN32 */
#include "opj_config.h"
#include "opj_includes.h"
typedef struct opj_decompression
{
opj_bool (* opj_read_header) ( struct opj_stream_private * cio,
void * p_codec,
opj_file_info_t * file_info,
struct opj_event_mgr * p_manager);
opj_image_t* (* opj_decode) ( void * p_codec,
struct opj_stream_private *p_cio,
struct opj_event_mgr * p_manager);
opj_bool (*opj_read_tile_header)( void * p_codec,
OPJ_UINT32 * p_tile_index,
OPJ_UINT32* p_data_size,
OPJ_INT32 * p_tile_x0, OPJ_INT32 * p_tile_y0,
OPJ_INT32 * p_tile_x1, OPJ_INT32 * p_tile_y1,
OPJ_UINT32 * p_nb_comps,
opj_bool * p_should_go_on,
struct opj_stream_private *p_cio,
struct opj_event_mgr * p_manager);
opj_bool (*opj_decode_tile_data)( void * p_codec,
OPJ_UINT32 p_tile_index,
OPJ_BYTE * p_data,
OPJ_UINT32 p_data_size,
struct opj_stream_private *p_cio,
struct opj_event_mgr * p_manager);
opj_bool (* opj_end_decompress) ( void *p_codec,
struct opj_stream_private *cio,
struct opj_event_mgr * p_manager);
void (* opj_destroy) (void * p_codec);
void (*opj_setup_decoder) (void * p_codec, opj_dparameters_t * p_param);
opj_bool (*opj_set_decode_area) ( void * p_codec,
OPJ_INT32 p_start_x, OPJ_INT32 p_end_x,
OPJ_INT32 p_start_y, OPJ_INT32 p_end_y,
struct opj_event_mgr * p_manager);
}opj_decompression_t;
typedef struct opj_compression
{
opj_bool (* opj_start_compress) (void *p_codec,struct opj_stream_private *cio,struct opj_image * p_image, struct opj_event_mgr * p_manager);
opj_bool (* opj_encode) (void * p_codec, struct opj_stream_private *p_cio, struct opj_event_mgr * p_manager);
opj_bool (* opj_write_tile) (void * p_codec,OPJ_UINT32 p_tile_index,OPJ_BYTE * p_data,OPJ_UINT32 p_data_size,struct opj_stream_private * p_cio,struct opj_event_mgr * p_manager);
opj_bool (* opj_end_compress) (void * p_codec, struct opj_stream_private *p_cio, struct opj_event_mgr * p_manager);
void (* opj_destroy) (void * p_codec);
void (*opj_setup_encoder) (void * p_codec,opj_cparameters_t * p_param,struct opj_image * p_image, struct opj_event_mgr * p_manager);
}opj_compression_t;
typedef struct opj_codec_private
{
/* code-blocks informations */
union {
opj_decompression_t m_decompression;
opj_compression_t m_compression;
} m_codec_data;
void * m_codec;
opj_event_mgr_t* m_event_mgr;
unsigned is_decompressor : 1;
}
opj_codec_private_t;
/**
* Default callback function.
* Do nothing.
*/
void opj_default_callback (const char *msg, void *client_data)
{
//FIXME V2 -> V1 cf below
}
void set_default_event_handler(opj_event_mgr_t * p_manager)
{
//FIXME V2 -> V1
//p_manager->m_error_data = 00;
//p_manager->m_warning_data = 00;
//p_manager->m_info_data = 00;
p_manager->error_handler = opj_default_callback;
p_manager->info_handler = opj_default_callback;
p_manager->warning_handler = opj_default_callback;
}
OPJ_UINT32 opj_read_from_file (void * p_buffer, OPJ_UINT32 p_nb_bytes, FILE * p_file)
{
OPJ_UINT32 l_nb_read = fread(p_buffer,1,p_nb_bytes,p_file);
return l_nb_read ? l_nb_read : -1;
}
OPJ_UINT32 opj_write_from_file (void * p_buffer, OPJ_UINT32 p_nb_bytes, FILE * p_file)
{
return fwrite(p_buffer,1,p_nb_bytes,p_file);
}
OPJ_SIZE_T opj_skip_from_file (OPJ_SIZE_T p_nb_bytes, FILE * p_user_data)
{
if (fseek(p_user_data,p_nb_bytes,SEEK_CUR)) {
return -1;
}
return p_nb_bytes;
}
opj_bool opj_seek_from_file (OPJ_SIZE_T p_nb_bytes, FILE * p_user_data)
{
if (fseek(p_user_data,p_nb_bytes,SEEK_SET)) {
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
/* ---------------------------------------------------------------------- */
#ifdef _WIN32
#ifndef OPJ_STATIC
BOOL APIENTRY
DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
OPJ_ARG_NOT_USED(lpReserved);
OPJ_ARG_NOT_USED(hModule);
switch (ul_reason_for_call) {
case DLL_PROCESS_ATTACH :
break;
case DLL_PROCESS_DETACH :
break;
case DLL_THREAD_ATTACH :
case DLL_THREAD_DETACH :
break;
}
return TRUE;
}
#endif /* OPJ_STATIC */
#endif /* _WIN32 */
/* ---------------------------------------------------------------------- */
const char* OPJ_CALLCONV opj_version(void) {
return PACKAGE_VERSION;
}
opj_dinfo_t* OPJ_CALLCONV opj_create_decompress(OPJ_CODEC_FORMAT format) {
opj_dinfo_t *dinfo = (opj_dinfo_t*)opj_calloc(1, sizeof(opj_dinfo_t));
if(!dinfo) return NULL;
dinfo->is_decompressor = OPJ_TRUE;
switch(format) {
case CODEC_J2K:
case CODEC_JPT:
/* get a J2K decoder handle */
dinfo->j2k_handle = (void*)j2k_create_decompress((opj_common_ptr)dinfo);
if(!dinfo->j2k_handle) {
opj_free(dinfo);
return NULL;
}
break;
case CODEC_JP2:
/* get a JP2 decoder handle */
dinfo->jp2_handle = (void*)jp2_create_decompress((opj_common_ptr)dinfo);
if(!dinfo->jp2_handle) {
opj_free(dinfo);
return NULL;
}
break;
case CODEC_UNKNOWN:
default:
opj_free(dinfo);
return NULL;
}
dinfo->codec_format = format;
return dinfo;
}
opj_codec_t* OPJ_CALLCONV opj_create_decompress_v2(OPJ_CODEC_FORMAT p_format)
{
opj_codec_private_t *l_info = 00;
l_info = (opj_codec_private_t*) opj_calloc(1, sizeof(opj_codec_private_t));
if (!l_info){
return 00;
}
memset(l_info, 0, sizeof(opj_codec_private_t));
l_info->is_decompressor = 1;
switch (p_format) {
case CODEC_J2K:
l_info->m_codec_data.m_decompression.opj_decode =
(opj_image_t* (*) (void *, struct opj_stream_private *, struct opj_event_mgr * ))j2k_decode; // TODO MSD
l_info->m_codec_data.m_decompression.opj_end_decompress =
(opj_bool (*) (void *, struct opj_stream_private *, struct opj_event_mgr *))j2k_end_decompress;
l_info->m_codec_data.m_decompression.opj_read_header =
(opj_bool (*) ( struct opj_stream_private *,
void *,
opj_file_info_t *,
struct opj_event_mgr * )) j2k_read_header;
l_info->m_codec_data.m_decompression.opj_destroy = (void (*) (void *))j2k_destroy;
l_info->m_codec_data.m_decompression.opj_setup_decoder = (void (*) (void * , opj_dparameters_t * )) j2k_setup_decoder_v2;
l_info->m_codec_data.m_decompression.opj_read_tile_header =
(opj_bool (*) ( void *,
OPJ_UINT32*,
OPJ_UINT32*,
OPJ_INT32*, OPJ_INT32*,
OPJ_INT32*, OPJ_INT32*,
OPJ_UINT32*,
opj_bool*,
struct opj_stream_private *,
struct opj_event_mgr * )) j2k_read_tile_header;
l_info->m_codec_data.m_decompression.opj_decode_tile_data =
(opj_bool (*) (void *, OPJ_UINT32, OPJ_BYTE*, OPJ_UINT32, struct opj_stream_private *, struct opj_event_mgr *)) j2k_decode_tile;
l_info->m_codec_data.m_decompression.opj_set_decode_area =
(opj_bool (*) (void *, OPJ_INT32, OPJ_INT32, OPJ_INT32, OPJ_INT32, struct opj_event_mgr *)) j2k_set_decode_area;
l_info->m_codec = j2k_create_decompress_v2();
if (! l_info->m_codec) {
opj_free(l_info);
return NULL;
}
break;
case CODEC_JP2:
/* get a JP2 decoder handle */
l_info->m_codec_data.m_decompression.opj_decode = (opj_image_t* (*) (void *, struct opj_stream_private *, struct opj_event_mgr * ))opj_jp2_decode; // TODO MSD
l_info->m_codec_data.m_decompression.opj_end_decompress = (opj_bool (*) (void *,struct opj_stream_private *,struct opj_event_mgr *)) jp2_end_decompress;
l_info->m_codec_data.m_decompression.opj_read_header = (opj_bool (*) (
struct opj_stream_private *,
void *,
opj_file_info_t *,
struct opj_event_mgr * )) jp2_read_header;
l_info->m_codec_data.m_decompression.opj_read_tile_header = ( opj_bool (*) (
void *,
OPJ_UINT32*,
OPJ_UINT32*,
OPJ_INT32*,
OPJ_INT32*,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_UINT32 * ,
opj_bool *,
struct opj_stream_private *,
struct opj_event_mgr * )) jp2_read_tile_header;
l_info->m_codec_data.m_decompression.opj_decode_tile_data = (opj_bool (*) (void *,OPJ_UINT32,OPJ_BYTE*,OPJ_UINT32,struct opj_stream_private *, struct opj_event_mgr * )) opj_jp2_decode_tile;
l_info->m_codec_data.m_decompression.opj_destroy = (void (*) (void *))jp2_destroy;
l_info->m_codec_data.m_decompression.opj_setup_decoder = (void (*) (void * ,opj_dparameters_t * )) jp2_setup_decoder_v2;
l_info->m_codec_data.m_decompression.opj_set_decode_area = (opj_bool (*) (void *,OPJ_INT32,OPJ_INT32,OPJ_INT32,OPJ_INT32, struct opj_event_mgr * )) jp2_set_decode_area;
l_info->m_codec = jp2_create(OPJ_TRUE);
if (! l_info->m_codec) {
opj_free(l_info);
return 00;
}
break;
case CODEC_UNKNOWN:
case CODEC_JPT:
default:
opj_free(l_info);
return 00;
}
// FIXME set_default_event_handler(&(l_info->m_event_mgr));
return (opj_codec_t*) l_info;
}
void OPJ_CALLCONV opj_destroy_decompress(opj_dinfo_t *dinfo) {
if(dinfo) {
/* destroy the codec */
switch(dinfo->codec_format) {
case CODEC_J2K:
case CODEC_JPT:
j2k_destroy_decompress((opj_j2k_t*)dinfo->j2k_handle);
break;
case CODEC_JP2:
jp2_destroy_decompress((opj_jp2_t*)dinfo->jp2_handle);
break;
case CODEC_UNKNOWN:
default:
break;
}
/* destroy the decompressor */
opj_free(dinfo);
}
}
void OPJ_CALLCONV opj_set_default_decoder_parameters(opj_dparameters_t *parameters) {
if(parameters) {
memset(parameters, 0, sizeof(opj_dparameters_t));
/* default decoding parameters */
parameters->cp_layer = 0;
parameters->cp_reduce = 0;
parameters->cp_limit_decoding = NO_LIMITATION;
parameters->decod_format = -1;
parameters->cod_format = -1;
/* UniPG>> */
#ifdef USE_JPWL
parameters->jpwl_correct = OPJ_FALSE;
parameters->jpwl_exp_comps = JPWL_EXPECTED_COMPONENTS;
parameters->jpwl_max_tiles = JPWL_MAXIMUM_TILES;
#endif /* USE_JPWL */
/* <<UniPG */
}
}
void OPJ_CALLCONV opj_setup_decoder(opj_dinfo_t *dinfo, opj_dparameters_t *parameters) {
if(dinfo && parameters) {
switch(dinfo->codec_format) {
case CODEC_J2K:
case CODEC_JPT:
j2k_setup_decoder((opj_j2k_t*)dinfo->j2k_handle, parameters);
break;
case CODEC_JP2:
jp2_setup_decoder((opj_jp2_t*)dinfo->jp2_handle, parameters);
break;
case CODEC_UNKNOWN:
default:
break;
}
}
}
opj_bool OPJ_CALLCONV opj_setup_decoder_v2(opj_codec_t *p_info, opj_dparameters_t *parameters, opj_event_mgr_t* event_mgr)
{
if (p_info && parameters) {
opj_codec_private_t * l_info = (opj_codec_private_t *) p_info;
if (! l_info->is_decompressor) {
return OPJ_FALSE;
}
l_info->m_codec_data.m_decompression.opj_setup_decoder(l_info->m_codec,parameters);
if (event_mgr == NULL)
{
l_info->m_event_mgr->error_handler = opj_default_callback ;
l_info->m_event_mgr->warning_handler = opj_default_callback ;
l_info->m_event_mgr->info_handler = opj_default_callback ;
l_info->m_event_mgr->client_data = stderr;
}
else
l_info->m_event_mgr = event_mgr;
return OPJ_TRUE;
}
return OPJ_FALSE;
}
opj_image_t* OPJ_CALLCONV opj_decode(opj_dinfo_t *dinfo, opj_cio_t *cio) {
return opj_decode_with_info(dinfo, cio, NULL);
}
opj_image_t* OPJ_CALLCONV opj_decode_with_info(opj_dinfo_t *dinfo, opj_cio_t *cio, opj_codestream_info_t *cstr_info) {
if(dinfo && cio) {
switch(dinfo->codec_format) {
case CODEC_J2K:
return j2k_decode((opj_j2k_t*)dinfo->j2k_handle, cio, cstr_info);
case CODEC_JPT:
return j2k_decode_jpt_stream((opj_j2k_t*)dinfo->j2k_handle, cio, cstr_info);
case CODEC_JP2:
return opj_jp2_decode((opj_jp2_t*)dinfo->jp2_handle, cio, cstr_info);
case CODEC_UNKNOWN:
default:
break;
}
}
return NULL;
}
opj_cinfo_t* OPJ_CALLCONV opj_create_compress(OPJ_CODEC_FORMAT format) {
opj_cinfo_t *cinfo = (opj_cinfo_t*)opj_calloc(1, sizeof(opj_cinfo_t));
if(!cinfo) return NULL;
cinfo->is_decompressor = OPJ_FALSE;
switch(format) {
case CODEC_J2K:
/* get a J2K coder handle */
cinfo->j2k_handle = (void*)j2k_create_compress((opj_common_ptr)cinfo);
if(!cinfo->j2k_handle) {
opj_free(cinfo);
return NULL;
}
break;
case CODEC_JP2:
/* get a JP2 coder handle */
cinfo->jp2_handle = (void*)jp2_create_compress((opj_common_ptr)cinfo);
if(!cinfo->jp2_handle) {
opj_free(cinfo);
return NULL;
}
break;
case CODEC_JPT:
case CODEC_UNKNOWN:
default:
opj_free(cinfo);
return NULL;
}
cinfo->codec_format = format;
return cinfo;
}
void OPJ_CALLCONV opj_destroy_compress(opj_cinfo_t *cinfo) {
if(cinfo) {
/* destroy the codec */
switch(cinfo->codec_format) {
case CODEC_J2K:
j2k_destroy_compress((opj_j2k_t*)cinfo->j2k_handle);
break;
case CODEC_JP2:
jp2_destroy_compress((opj_jp2_t*)cinfo->jp2_handle);
break;
case CODEC_JPT:
case CODEC_UNKNOWN:
default:
break;
}
/* destroy the decompressor */
opj_free(cinfo);
}
}
void OPJ_CALLCONV opj_set_default_encoder_parameters(opj_cparameters_t *parameters) {
if(parameters) {
memset(parameters, 0, sizeof(opj_cparameters_t));
/* default coding parameters */
parameters->cp_cinema = OFF;
parameters->max_comp_size = 0;
parameters->numresolution = 6;
parameters->cp_rsiz = STD_RSIZ;
parameters->cblockw_init = 64;
parameters->cblockh_init = 64;
parameters->prog_order = LRCP;
parameters->roi_compno = -1; /* no ROI */
parameters->subsampling_dx = 1;
parameters->subsampling_dy = 1;
parameters->tp_on = 0;
parameters->decod_format = -1;
parameters->cod_format = -1;
parameters->tcp_rates[0] = 0;
parameters->tcp_numlayers = 0;
parameters->cp_disto_alloc = 0;
parameters->cp_fixed_alloc = 0;
parameters->cp_fixed_quality = 0;
parameters->jpip_on = OPJ_FALSE;
/* UniPG>> */
#ifdef USE_JPWL
parameters->jpwl_epc_on = OPJ_FALSE;
parameters->jpwl_hprot_MH = -1; /* -1 means unassigned */
{
int i;
for (i = 0; i < JPWL_MAX_NO_TILESPECS; i++) {
parameters->jpwl_hprot_TPH_tileno[i] = -1; /* unassigned */
parameters->jpwl_hprot_TPH[i] = 0; /* absent */
}
};
{
int i;
for (i = 0; i < JPWL_MAX_NO_PACKSPECS; i++) {
parameters->jpwl_pprot_tileno[i] = -1; /* unassigned */
parameters->jpwl_pprot_packno[i] = -1; /* unassigned */
parameters->jpwl_pprot[i] = 0; /* absent */
}
};
parameters->jpwl_sens_size = 0; /* 0 means no ESD */
parameters->jpwl_sens_addr = 0; /* 0 means auto */
parameters->jpwl_sens_range = 0; /* 0 means packet */
parameters->jpwl_sens_MH = -1; /* -1 means unassigned */
{
int i;
for (i = 0; i < JPWL_MAX_NO_TILESPECS; i++) {
parameters->jpwl_sens_TPH_tileno[i] = -1; /* unassigned */
parameters->jpwl_sens_TPH[i] = -1; /* absent */
}
};
#endif /* USE_JPWL */
/* <<UniPG */
}
}
/**
* Helper function.
* Sets the stream to be a file stream. The FILE must have been open previously.
* @param p_stream the stream to modify
* @param p_file handler to an already open file.
*/
opj_stream_t* OPJ_CALLCONV opj_stream_create_default_file_stream (FILE * p_file, opj_bool p_is_read_stream)
{
return opj_stream_create_file_stream(p_file,J2K_STREAM_CHUNK_SIZE,p_is_read_stream);
}
opj_stream_t* OPJ_CALLCONV opj_stream_create_file_stream (FILE * p_file, OPJ_UINT32 p_size, opj_bool p_is_read_stream)
{
opj_stream_t* l_stream = 00;
if (! p_file) {
return NULL;
}
l_stream = opj_stream_create(p_size,p_is_read_stream);
if (! l_stream) {
return NULL;
}
opj_stream_set_user_data(l_stream, p_file);
opj_stream_set_read_function(l_stream, (opj_stream_read_fn) opj_read_from_file);
opj_stream_set_write_function(l_stream, (opj_stream_write_fn) opj_write_from_file);
opj_stream_set_skip_function(l_stream, (opj_stream_skip_fn) opj_skip_from_file);
opj_stream_set_seek_function(l_stream, (opj_stream_seek_fn) opj_seek_from_file);
return l_stream;
}
void OPJ_CALLCONV opj_setup_encoder(opj_cinfo_t *cinfo, opj_cparameters_t *parameters, opj_image_t *image) {
if(cinfo && parameters && image) {
switch(cinfo->codec_format) {
case CODEC_J2K:
j2k_setup_encoder((opj_j2k_t*)cinfo->j2k_handle, parameters, image);
break;
case CODEC_JP2:
jp2_setup_encoder((opj_jp2_t*)cinfo->jp2_handle, parameters, image);
break;
case CODEC_JPT:
case CODEC_UNKNOWN:
default:
break;
}
}
}
opj_bool OPJ_CALLCONV opj_encode(opj_cinfo_t *cinfo, opj_cio_t *cio, opj_image_t *image, char *index) {
if (index != NULL)
opj_event_msg((opj_common_ptr)cinfo, EVT_WARNING, "Set index to NULL when calling the opj_encode function.\n"
"To extract the index, use the opj_encode_with_info() function.\n"
"No index will be generated during this encoding\n");
return opj_encode_with_info(cinfo, cio, image, NULL);
}
opj_bool OPJ_CALLCONV opj_encode_with_info(opj_cinfo_t *cinfo, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) {
if(cinfo && cio && image) {
switch(cinfo->codec_format) {
case CODEC_J2K:
return j2k_encode((opj_j2k_t*)cinfo->j2k_handle, cio, image, cstr_info);
case CODEC_JP2:
return opj_jp2_encode((opj_jp2_t*)cinfo->jp2_handle, cio, image, cstr_info);
case CODEC_JPT:
case CODEC_UNKNOWN:
default:
break;
}
}
return OPJ_FALSE;
}
void OPJ_CALLCONV opj_destroy_cstr_info(opj_codestream_info_t *cstr_info) {
if (cstr_info) {
int tileno;
for (tileno = 0; tileno < cstr_info->tw * cstr_info->th; tileno++) {
opj_tile_info_t *tile_info = &cstr_info->tile[tileno];
opj_free(tile_info->thresh);
opj_free(tile_info->packet);
opj_free(tile_info->tp);
opj_free(tile_info->marker);
}
opj_free(cstr_info->tile);
opj_free(cstr_info->marker);
opj_free(cstr_info->numdecompos);
}
}
#ifdef OLD_WAY_MS
opj_bool OPJ_CALLCONV opj_read_header (
opj_codec_t *p_codec,
opj_image_t ** p_image,
OPJ_INT32 * p_tile_x0,
OPJ_INT32 * p_tile_y0,
OPJ_UINT32 * p_tile_width,
OPJ_UINT32 * p_tile_height,
OPJ_UINT32 * p_nb_tiles_x,
OPJ_UINT32 * p_nb_tiles_y,
opj_stream_t *p_cio)
{
if (p_codec && p_cio) {
opj_codec_private_t * l_info = (opj_codec_private_t *) p_codec;
opj_stream_private_t * l_cio = (opj_stream_private_t *) p_cio;
if(! l_info->is_decompressor) {
return OPJ_FALSE;
}
return l_info->m_codec_data.m_decompression.opj_read_header(
l_info->m_codec,
p_image,
p_tile_x0,
p_tile_y0,
p_tile_width,
p_tile_height,
p_nb_tiles_x,
p_nb_tiles_y,
l_cio,
l_info->m_event_mgr); //&(l_info->m_event_mgr));
}
return OPJ_FALSE;
}
#endif
opj_bool OPJ_CALLCONV opj_read_header ( opj_stream_t *p_cio,
opj_codec_t *p_codec,
opj_file_info_t* p_file_info,
OPJ_INT32 file_info_flag)
{
/* Initialize the output structure */
opj_initialise_file_info(p_file_info, file_info_flag, CODEC_J2K);
if (p_codec && p_cio) {
opj_codec_private_t* l_info = (opj_codec_private_t*) p_codec;
opj_stream_private_t* l_cio = (opj_stream_private_t*) p_cio;
if(! l_info->is_decompressor) {
return OPJ_FALSE;
}
return l_info->m_codec_data.m_decompression.opj_read_header(
l_cio,
l_info->m_codec,
p_file_info,
l_info->m_event_mgr);
}
return OPJ_FALSE;
}
void OPJ_CALLCONV opj_destroy_codec(opj_codec_t *p_info)
{
if
(p_info)
{
opj_codec_private_t * l_info = (opj_codec_private_t *) p_info;
if
(l_info->is_decompressor)
{
l_info->m_codec_data.m_decompression.opj_destroy(l_info->m_codec);
}
else
{
l_info->m_codec_data.m_compression.opj_destroy(l_info->m_codec);
}
l_info->m_codec = 00;
opj_free(l_info);
}
}
/**
* Sets the given area to be decoded. This function should be called right after opj_read_header and before any tile header reading.
*
* @param p_codec the jpeg2000 codec.
* @param p_start_x the left position of the rectangle to decode (in image coordinates).
* @param p_end_x the right position of the rectangle to decode (in image coordinates).
* @param p_start_y the up position of the rectangle to decode (in image coordinates).
* @param p_end_y the bottom position of the rectangle to decode (in image coordinates).
*
* @return true if the area could be set.
*/
opj_bool OPJ_CALLCONV opj_set_decode_area( opj_codec_t *p_codec,
OPJ_INT32 p_start_x, OPJ_INT32 p_start_y,
OPJ_INT32 p_end_x, OPJ_INT32 p_end_y
)
{
if (p_codec) {
opj_codec_private_t * l_info = (opj_codec_private_t *) p_codec;
if (! l_info->is_decompressor) {
return OPJ_FALSE;
}
return l_info->m_codec_data.m_decompression.opj_set_decode_area(
l_info->m_codec,
p_start_x,
p_start_y,
p_end_x,
p_end_y,
l_info->m_event_mgr);
}
return OPJ_FALSE;
}
/**
* Reads a tile header. This function is compulsory and allows one to know the size of the tile thta will be decoded.
* The user may need to refer to the image got by opj_read_header to understand the size being taken by the tile.
*
* @param p_codec the jpeg2000 codec.
* @param p_tile_index pointer to a value that will hold the index of the tile being decoded, in case of success.
* @param p_data_size pointer to a value that will hold the maximum size of the decoded data, in case of success. In case
* of truncated codestreams, the actual number of bytes decoded may be lower. The computation of the size is the same
* as depicted in opj_write_tile.
* @param p_tile_x0 pointer to a value that will hold the x0 pos of the tile (in the image).
* @param p_tile_y0 pointer to a value that will hold the y0 pos of the tile (in the image).
* @param p_tile_x1 pointer to a value that will hold the x1 pos of the tile (in the image).
* @param p_tile_y1 pointer to a value that will hold the y1 pos of the tile (in the image).
* @param p_nb_comps pointer to a value that will hold the number of components in the tile.
* @param p_should_go_on pointer to a boolean that will hold the fact that the decoding should go on. In case the
* codestream is over at the time of the call, the value will be set to false. The user should then stop
* the decoding.
* @param p_stream the stream to decode.
* @return true if the tile header could be decoded. In case the decoding should end, the returned value is still true.
* returning false may be the result of a shortage of memory or an internal error.
*/
opj_bool OPJ_CALLCONV opj_read_tile_header(
opj_codec_t *p_codec,
opj_stream_t * p_stream,
OPJ_UINT32 * p_tile_index,
OPJ_UINT32 * p_data_size,
OPJ_INT32 * p_tile_x0, OPJ_INT32 * p_tile_y0,
OPJ_INT32 * p_tile_x1, OPJ_INT32 * p_tile_y1,
OPJ_UINT32 * p_nb_comps,
opj_bool * p_should_go_on)
{
if (p_codec && p_stream && p_data_size && p_tile_index) {
opj_codec_private_t * l_info = (opj_codec_private_t *) p_codec;
opj_stream_private_t * l_cio = (opj_stream_private_t *) p_stream;
if (! l_info->is_decompressor) {
return OPJ_FALSE;
}
return l_info->m_codec_data.m_decompression.opj_read_tile_header(
l_info->m_codec,
p_tile_index,
p_data_size,
p_tile_x0, p_tile_y0,
p_tile_x1, p_tile_y1,
p_nb_comps,
p_should_go_on,
l_cio,
l_info->m_event_mgr);
}
return OPJ_FALSE;
}
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