diff options
Diffstat (limited to 'src/3rdparty/jasper/src/libjasper/jpg/jpg_dec.c')
| -rw-r--r-- | src/3rdparty/jasper/src/libjasper/jpg/jpg_dec.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/src/3rdparty/jasper/src/libjasper/jpg/jpg_dec.c b/src/3rdparty/jasper/src/libjasper/jpg/jpg_dec.c new file mode 100644 index 0000000..8d851e9 --- /dev/null +++ b/src/3rdparty/jasper/src/libjasper/jpg/jpg_dec.c @@ -0,0 +1,340 @@ +/* + * Copyright (c) 2001-2003 Michael David Adams. + * All rights reserved. + */ + +/* __START_OF_JASPER_LICENSE__ + * + * JasPer License Version 2.0 + * + * Copyright (c) 2001-2006 Michael David Adams + * Copyright (c) 1999-2000 Image Power, Inc. + * Copyright (c) 1999-2000 The University of British Columbia + * + * All rights reserved. + * + * Permission is hereby granted, free of charge, to any person (the + * "User") obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, and/or sell copies of the Software, and to permit + * persons to whom the Software is furnished to do so, subject to the + * following conditions: + * + * 1. The above copyright notices and this permission notice (which + * includes the disclaimer below) shall be included in all copies or + * substantial portions of the Software. + * + * 2. The name of a copyright holder shall not be used to endorse or + * promote products derived from the Software without specific prior + * written permission. + * + * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS + * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER + * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS + * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING + * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A + * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL + * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING + * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, + * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION + * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE + * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE + * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. + * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS + * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL + * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS + * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE + * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE + * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL + * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, + * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL + * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH + * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, + * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH + * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY + * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. + * + * __END_OF_JASPER_LICENSE__ + */ + +/******************************************************************************\ +* Includes. +\******************************************************************************/ + +#include <stdio.h> +#include <assert.h> +#include <ctype.h> + +#include "jasper/jas_tvp.h" +#include "jasper/jas_stream.h" +#include "jasper/jas_image.h" +#include "jasper/jas_string.h" + +#include "jpg_jpeglib.h" +#include "jpg_cod.h" + +/******************************************************************************\ +* Types. +\******************************************************************************/ + +/* JPEG decoder data sink type. */ + +typedef struct jpg_dest_s { + + /* Initialize output. */ + void (*start_output)(j_decompress_ptr cinfo, struct jpg_dest_s *dinfo); + + /* Output rows of decompressed data. */ + void (*put_pixel_rows)(j_decompress_ptr cinfo, struct jpg_dest_s *dinfo, + JDIMENSION rows_supplied); + + /* Cleanup output. */ + void (*finish_output)(j_decompress_ptr cinfo, struct jpg_dest_s *dinfo); + + /* Output buffer. */ + JSAMPARRAY buffer; + + /* Height of output buffer. */ + JDIMENSION buffer_height; + + /* The current row. */ + JDIMENSION row; + + /* The image used to hold the decompressed sample data. */ + jas_image_t *image; + + /* The row buffer. */ + jas_matrix_t *data; + + /* The error indicator. If this is nonzero, something has gone wrong + during decompression. */ + int error; + +} jpg_dest_t; + +/******************************************************************************\ +* Local functions. +\******************************************************************************/ + +static void jpg_start_output(j_decompress_ptr cinfo, jpg_dest_t *dinfo); +static void jpg_put_pixel_rows(j_decompress_ptr cinfo, jpg_dest_t *dinfo, + JDIMENSION rows_supplied); +static void jpg_finish_output(j_decompress_ptr cinfo, jpg_dest_t *dinfo); +static int jpg_copystreamtofile(FILE *out, jas_stream_t *in); +static jas_image_t *jpg_mkimage(j_decompress_ptr cinfo); + +/******************************************************************************\ +* Code for load operation. +\******************************************************************************/ + +/* Load an image from a stream in the JPG format. */ + +jas_image_t *jpg_decode(jas_stream_t *in, char *optstr) +{ + struct jpeg_decompress_struct cinfo; + struct jpeg_error_mgr jerr; + FILE *input_file; + jpg_dest_t dest_mgr_buf; + jpg_dest_t *dest_mgr = &dest_mgr_buf; + int num_scanlines; + jas_image_t *image; + + /* Avoid compiler warnings about unused parameters. */ + optstr = 0; + + image = 0; + input_file = 0; + if (!(input_file = tmpfile())) { + goto error; + } + if (jpg_copystreamtofile(input_file, in)) { + goto error; + } + rewind(input_file); + + /* Allocate and initialize a JPEG decompression object. */ + cinfo.err = jpeg_std_error(&jerr); + jpeg_create_decompress(&cinfo); + + /* Specify the data source for decompression. */ + jpeg_stdio_src(&cinfo, input_file); + + /* Read the file header to obtain the image information. */ + jpeg_read_header(&cinfo, TRUE); + + /* Start the decompressor. */ + jpeg_start_decompress(&cinfo); + + /* Create an image object to hold the decoded data. */ + if (!(image = jpg_mkimage(&cinfo))) { + goto error; + } + + /* Initialize the data sink object. */ + dest_mgr->image = image; + dest_mgr->data = jas_matrix_create(1, cinfo.output_width); + dest_mgr->start_output = jpg_start_output; + dest_mgr->put_pixel_rows = jpg_put_pixel_rows; + dest_mgr->finish_output = jpg_finish_output; + dest_mgr->buffer = (*cinfo.mem->alloc_sarray) + ((j_common_ptr) &cinfo, JPOOL_IMAGE, + cinfo.output_width * cinfo.output_components, (JDIMENSION) 1); + dest_mgr->buffer_height = 1; + dest_mgr->error = 0; + + /* Process the compressed data. */ + (*dest_mgr->start_output)(&cinfo, dest_mgr); + while (cinfo.output_scanline < cinfo.output_height) { + num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer, + dest_mgr->buffer_height); + (*dest_mgr->put_pixel_rows)(&cinfo, dest_mgr, num_scanlines); + } + (*dest_mgr->finish_output)(&cinfo, dest_mgr); + + /* Complete the decompression process. */ + jpeg_finish_decompress(&cinfo); + + /* Destroy the JPEG decompression object. */ + jpeg_destroy_decompress(&cinfo); + + jas_matrix_destroy(dest_mgr->data); + + fclose(input_file); + + if (dest_mgr->error) { + goto error; + } + + return image; + +error: + if (image) { + jas_image_destroy(image); + } + if (input_file) { + fclose(input_file); + } + return 0; +} + +/******************************************************************************\ +* +\******************************************************************************/ + +static jas_image_t *jpg_mkimage(j_decompress_ptr cinfo) +{ + jas_image_t *image; + int cmptno; + jas_image_cmptparm_t cmptparm; + int numcmpts; + + image = 0; + numcmpts = cinfo->output_components; + if (!(image = jas_image_create0())) { + goto error; + } + for (cmptno = 0; cmptno < numcmpts; ++cmptno) { + cmptparm.tlx = 0; + cmptparm.tly = 0; + cmptparm.hstep = 1; + cmptparm.vstep = 1; + cmptparm.width = cinfo->image_width; + cmptparm.height = cinfo->image_height; + cmptparm.prec = 8; + cmptparm.sgnd = false; + if (jas_image_addcmpt(image, cmptno, &cmptparm)) { + goto error; + } + } + + if (numcmpts == 3) { + jas_image_setclrspc(image, JAS_CLRSPC_SRGB); + jas_image_setcmpttype(image, 0, + JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R)); + jas_image_setcmpttype(image, 1, + JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G)); + jas_image_setcmpttype(image, 2, + JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B)); + } else { + jas_image_setclrspc(image, JAS_CLRSPC_SGRAY); + jas_image_setcmpttype(image, 0, + JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_GRAY_Y)); + } + + return image; + +error: + if (image) { + jas_image_destroy(image); + } + return 0; +} + +/******************************************************************************\ +* Data source code. +\******************************************************************************/ + +static int jpg_copystreamtofile(FILE *out, jas_stream_t *in) +{ + int c; + + while ((c = jas_stream_getc(in)) != EOF) { + if (fputc(c, out) == EOF) { + return -1; + } + } + if (jas_stream_error(in)) { + return -1; + } + return 0; +} + +/******************************************************************************\ +* Data sink code. +\******************************************************************************/ + +static void jpg_start_output(j_decompress_ptr cinfo, jpg_dest_t *dinfo) +{ + /* Avoid compiler warnings about unused parameters. */ + cinfo = 0; + + dinfo->row = 0; +} + +static void jpg_put_pixel_rows(j_decompress_ptr cinfo, jpg_dest_t *dinfo, + JDIMENSION rows_supplied) +{ + JSAMPLE *bufptr; + int cmptno; + JDIMENSION x; + uint_fast32_t width; + + if (dinfo->error) { + return; + } + + assert(cinfo->output_components == jas_image_numcmpts(dinfo->image)); + + for (cmptno = 0; cmptno < cinfo->output_components; ++cmptno) { + width = jas_image_cmptwidth(dinfo->image, cmptno); + bufptr = (dinfo->buffer[0]) + cmptno; + for (x = 0; x < width; ++x) { + jas_matrix_set(dinfo->data, 0, x, GETJSAMPLE(*bufptr)); + bufptr += cinfo->output_components; + } + if (jas_image_writecmpt(dinfo->image, cmptno, 0, dinfo->row, width, 1, + dinfo->data)) { + dinfo->error = 1; + } + } + dinfo->row += rows_supplied; +} + +static void jpg_finish_output(j_decompress_ptr cinfo, jpg_dest_t *dinfo) +{ + /* Avoid compiler warnings about unused parameters. */ + cinfo = 0; + dinfo = 0; +} |