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[trunk] add j2k_get_tile_data in trunk from branch v2

This commit is contained in:
Mickael Savinaud 2012-03-09 17:16:16 +00:00
parent 4b8c29a708
commit 1ac93c3a72
1 changed files with 108 additions and 0 deletions
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108
libopenjpeg/j2k.c
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@ -207,6 +207,8 @@ static opj_bool j2k_pre_write_tile ( opj_j2k_v2_t * p_j2k,
static opj_bool j2k_update_image_data (opj_tcd_v2_t * p_tcd, OPJ_BYTE * p_data, opj_image_t* p_output_image); static opj_bool j2k_update_image_data (opj_tcd_v2_t * p_tcd, OPJ_BYTE * p_data, opj_image_t* p_output_image);
static void j2k_get_tile_data (opj_tcd_v2_t * p_tcd, OPJ_BYTE * p_data);
/* /*
* ----------------------------------------------------------------------- * -----------------------------------------------------------------------
@ -8661,3 +8663,109 @@ opj_bool j2k_pre_write_tile ( opj_j2k_v2_t * p_j2k,
return OPJ_TRUE; return OPJ_TRUE;
} }
/*
*
*/
void j2k_get_tile_data (opj_tcd_v2_t * p_tcd, OPJ_BYTE * p_data)
{
OPJ_UINT32 i,j,k = 0;
OPJ_UINT32 l_width,l_height,l_stride, l_offset_x,l_offset_y, l_image_width;
opj_image_comp_t * l_img_comp = 00;
opj_tcd_tilecomp_t * l_tilec = 00;
opj_image_t * l_image = 00;
OPJ_UINT32 l_size_comp, l_remaining;
OPJ_INT32 * l_src_ptr;
l_tilec = p_tcd->tcd_image->tiles->comps;
l_image = p_tcd->image;
l_img_comp = l_image->comps;
for (i=0;i<p_tcd->image->numcomps;++i) {
l_size_comp = l_img_comp->prec >> 3; /* (/8) */
l_remaining = l_img_comp->prec & 7; /* (%8) */
if (l_remaining) {
++l_size_comp;
}
if (l_size_comp == 3) {
l_size_comp = 4;
}
l_width = (l_tilec->x1 - l_tilec->x0);
l_height = (l_tilec->y1 - l_tilec->y0);
l_offset_x = int_ceildiv(l_image->x0, l_img_comp->dx);
l_offset_y = int_ceildiv(l_image->y0, l_img_comp->dy);
l_image_width = int_ceildiv(l_image->x1 - l_image->x0, l_img_comp->dx);
l_stride = l_image_width - l_width;
l_src_ptr = l_img_comp->data + (l_tilec->x0 - l_offset_x) + (l_tilec->y0 - l_offset_y) * l_image_width;
switch (l_size_comp) {
case 1:
{
OPJ_CHAR * l_dest_ptr = (OPJ_CHAR*) p_data;
if (l_img_comp->sgnd) {
for (j=0;j<l_height;++j) {
for (k=0;k<l_width;++k) {
*(l_dest_ptr) = (OPJ_CHAR) (*l_src_ptr);
++l_dest_ptr;
++l_src_ptr;
}
l_src_ptr += l_stride;
}
}
else {
for (j=0;j<l_height;++j) {
for (k=0;k<l_width;++k) {
*(l_dest_ptr) = (*l_src_ptr)&0xff;
++l_dest_ptr;
++l_src_ptr;
}
l_src_ptr += l_stride;
}
}
p_data = (OPJ_BYTE*) l_dest_ptr;
}
break;
case 2:
{
OPJ_INT16 * l_dest_ptr = (OPJ_INT16 *) p_data;
if (l_img_comp->sgnd) {
for (j=0;j<l_height;++j) {
for (k=0;k<l_width;++k) {
*(l_dest_ptr++) = (OPJ_INT16) (*(l_src_ptr++));
}
l_src_ptr += l_stride;
}
}
else {
for (j=0;j<l_height;++j) {
for (k=0;k<l_width;++k) {
*(l_dest_ptr++) = (*(l_src_ptr++))&0xffff;
}
l_src_ptr += l_stride;
}
}
p_data = (OPJ_BYTE*) l_dest_ptr;
}
break;
case 4:
{
OPJ_INT32 * l_dest_ptr = (OPJ_INT32 *) p_data;
for (j=0;j<l_height;++j) {
for (k=0;k<l_width;++k) {
*(l_dest_ptr++) = *(l_src_ptr++);
}
l_src_ptr += l_stride;
}
p_data = (OPJ_BYTE*) l_dest_ptr;
}
break;
}
++l_img_comp;
++l_tilec;
}
}