зеркало из https://github.com/mozilla/mozjpeg.git
1102 строки
31 KiB
C
1102 строки
31 KiB
C
/*
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* Copyright (C)2009-2011 D. R. Commander. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the libjpeg-turbo Project nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* TurboJPEG/OSS: this implements the TurboJPEG API using libjpeg-turbo */
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#include <stdio.h>
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#include <stdlib.h>
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#include <jinclude.h>
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#define JPEG_INTERNALS
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#include <jpeglib.h>
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#include <jerror.h>
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#include <setjmp.h>
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#include "./turbojpeg.h"
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#include "./tjutil.h"
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#include "transupp.h"
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extern void jpeg_mem_dest_tj(j_compress_ptr, unsigned char **,
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unsigned long *, boolean);
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extern void jpeg_mem_src_tj(j_decompress_ptr, unsigned char *, unsigned long);
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#define PAD(v, p) ((v+(p)-1)&(~((p)-1)))
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/* Error handling (based on example in example.c) */
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static char errStr[JMSG_LENGTH_MAX]="No error";
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struct my_error_mgr
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{
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struct jpeg_error_mgr pub;
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jmp_buf setjmp_buffer;
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};
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typedef struct my_error_mgr *my_error_ptr;
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static void my_error_exit(j_common_ptr cinfo)
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{
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my_error_ptr myerr=(my_error_ptr)cinfo->err;
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(*cinfo->err->output_message)(cinfo);
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longjmp(myerr->setjmp_buffer, 1);
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}
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/* Based on output_message() in jerror.c */
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static void my_output_message(j_common_ptr cinfo)
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{
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(*cinfo->err->format_message)(cinfo, errStr);
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}
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/* Global structures, macros, etc. */
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enum {COMPRESS=1, DECOMPRESS=2};
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typedef struct _tjinstance
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{
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struct jpeg_compress_struct cinfo;
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struct jpeg_decompress_struct dinfo;
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struct my_error_mgr jerr;
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int init;
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} tjinstance;
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static const int pixelsize[TJ_NUMSAMP]={3, 3, 3, 1, 3};
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static const JXFORM_CODE xformtypes[TJ_NUMXOP]=
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{
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JXFORM_NONE, JXFORM_FLIP_H, JXFORM_FLIP_V, JXFORM_TRANSPOSE,
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JXFORM_TRANSVERSE, JXFORM_ROT_90, JXFORM_ROT_180, JXFORM_ROT_270
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};
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#define NUMSF 4
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static const tjscalingfactor sf[NUMSF]={
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{1, 1},
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{1, 2},
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{1, 4},
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{1, 8}
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};
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#define _throw(m) {snprintf(errStr, JMSG_LENGTH_MAX, "%s", m); \
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retval=-1; goto bailout;}
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#define getinstance(handle) tjinstance *this=(tjinstance *)handle; \
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j_compress_ptr cinfo=NULL; j_decompress_ptr dinfo=NULL; \
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if(!this) {snprintf(errStr, JMSG_LENGTH_MAX, "Invalid handle"); \
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return -1;} \
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cinfo=&this->cinfo; dinfo=&this->dinfo;
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static int getPixelFormat(int pixelSize, int flags)
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{
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if(pixelSize==1) return TJPF_GRAY;
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if(pixelSize==3)
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{
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if(flags&TJ_BGR) return TJPF_BGR;
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else return TJPF_RGB;
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}
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if(pixelSize==4)
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{
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if(flags&TJ_ALPHAFIRST)
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{
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if(flags&TJ_BGR) return TJPF_XBGR;
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else return TJPF_XRGB;
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}
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else
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{
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if(flags&TJ_BGR) return TJPF_BGRX;
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else return TJPF_RGBX;
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}
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}
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return -1;
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}
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static int setCompDefaults(struct jpeg_compress_struct *cinfo,
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int pixelFormat, int subsamp, int jpegQual)
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{
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int retval=0;
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switch(pixelFormat)
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{
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case TJPF_GRAY:
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cinfo->in_color_space=JCS_GRAYSCALE; break;
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#if JCS_EXTENSIONS==1
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case TJPF_RGB:
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cinfo->in_color_space=JCS_EXT_RGB; break;
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case TJPF_BGR:
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cinfo->in_color_space=JCS_EXT_BGR; break;
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case TJPF_RGBX:
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case TJPF_RGBA:
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cinfo->in_color_space=JCS_EXT_RGBX; break;
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case TJPF_BGRX:
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case TJPF_BGRA:
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cinfo->in_color_space=JCS_EXT_BGRX; break;
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case TJPF_XRGB:
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case TJPF_ARGB:
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cinfo->in_color_space=JCS_EXT_XRGB; break;
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case TJPF_XBGR:
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case TJPF_ABGR:
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cinfo->in_color_space=JCS_EXT_XBGR; break;
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#else
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case TJPF_RGB:
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if(RGB_RED==0 && RGB_GREEN==1 && RGB_BLUE==2 && RGB_PIXELSIZE==3)
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{
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cinfo->in_color_space=JCS_RGB; break;
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}
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default:
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_throw("Unsupported pixel format");
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#endif
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}
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cinfo->input_components=tjPixelSize[pixelFormat];
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jpeg_set_defaults(cinfo);
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if(jpegQual>=0)
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{
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jpeg_set_quality(cinfo, jpegQual, TRUE);
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if(jpegQual>=96) cinfo->dct_method=JDCT_ISLOW;
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else cinfo->dct_method=JDCT_FASTEST;
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}
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if(subsamp==TJSAMP_GRAY)
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jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
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else
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jpeg_set_colorspace(cinfo, JCS_YCbCr);
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cinfo->comp_info[0].h_samp_factor=tjMCUWidth[subsamp]/8;
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cinfo->comp_info[1].h_samp_factor=1;
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cinfo->comp_info[2].h_samp_factor=1;
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cinfo->comp_info[0].v_samp_factor=tjMCUHeight[subsamp]/8;
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cinfo->comp_info[1].v_samp_factor=1;
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cinfo->comp_info[2].v_samp_factor=1;
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#if JCS_EXTENSIONS!=1
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bailout:
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#endif
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return retval;
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}
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static int setDecompDefaults(struct jpeg_decompress_struct *dinfo,
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int pixelFormat)
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{
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int retval=0;
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switch(pixelFormat)
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{
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case TJPF_GRAY:
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dinfo->out_color_space=JCS_GRAYSCALE; break;
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#if JCS_EXTENSIONS==1
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case TJPF_RGB:
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dinfo->out_color_space=JCS_EXT_RGB; break;
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case TJPF_BGR:
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dinfo->out_color_space=JCS_EXT_BGR; break;
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case TJPF_RGBX:
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dinfo->out_color_space=JCS_EXT_RGBX; break;
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case TJPF_BGRX:
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dinfo->out_color_space=JCS_EXT_BGRX; break;
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case TJPF_XRGB:
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dinfo->out_color_space=JCS_EXT_XRGB; break;
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case TJPF_XBGR:
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dinfo->out_color_space=JCS_EXT_XBGR; break;
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#if JCS_ALPHA_EXTENSIONS==1
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case TJPF_RGBA:
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dinfo->out_color_space=JCS_EXT_RGBA; break;
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case TJPF_BGRA:
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dinfo->out_color_space=JCS_EXT_BGRA; break;
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case TJPF_ARGB:
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dinfo->out_color_space=JCS_EXT_ARGB; break;
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case TJPF_ABGR:
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dinfo->out_color_space=JCS_EXT_ABGR; break;
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#endif
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#else
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case TJPF_RGB:
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if(RGB_RED==0 && RGB_GREEN==1 && RGB_BLUE==2 && RGB_PIXELSIZE==3)
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{
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dinfo->out_color_space=JCS_RGB; break;
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}
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#endif
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default:
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_throw("Unsupported pixel format");
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}
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bailout:
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return retval;
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}
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static int getSubsamp(j_decompress_ptr dinfo)
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{
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int retval=-1, i, k;
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for(i=0; i<NUMSUBOPT; i++)
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{
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if(dinfo->num_components==pixelsize[i])
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{
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if(dinfo->comp_info[0].h_samp_factor==tjMCUWidth[i]/8
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&& dinfo->comp_info[0].v_samp_factor==tjMCUHeight[i]/8)
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{
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int match=0;
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for(k=1; k<dinfo->num_components; k++)
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{
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if(dinfo->comp_info[k].h_samp_factor==1
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&& dinfo->comp_info[k].v_samp_factor==1)
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match++;
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}
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if(match==dinfo->num_components-1)
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{
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retval=i; break;
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}
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}
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}
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}
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return retval;
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}
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/* General API functions */
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DLLEXPORT char* DLLCALL tjGetErrorStr(void)
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{
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return errStr;
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}
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DLLEXPORT int DLLCALL tjDestroy(tjhandle handle)
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{
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getinstance(handle);
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if(setjmp(this->jerr.setjmp_buffer)) return -1;
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if(this->init&COMPRESS) jpeg_destroy_compress(cinfo);
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if(this->init&DECOMPRESS) jpeg_destroy_decompress(dinfo);
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free(this);
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return 0;
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}
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/* These are exposed mainly because Windows can't malloc() and free() across
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DLL boundaries except when the CRT DLL is used, and we don't use the CRT DLL
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with turbojpeg.dll for compatibility reasons. However, these functions
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can potentially be used for other purposes by different implementations. */
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DLLEXPORT void DLLCALL tjFree(unsigned char *buf)
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{
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if(buf) free(buf);
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}
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DLLEXPORT unsigned char *DLLCALL tjAlloc(int bytes)
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{
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return (unsigned char *)malloc(bytes);
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}
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/* Compressor */
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static tjhandle _tjInitCompress(tjinstance *this)
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{
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unsigned char buffer[1], *buf=buffer; unsigned long size=1;
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/* This is also straight out of example.c */
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this->cinfo.err=jpeg_std_error(&this->jerr.pub);
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this->jerr.pub.error_exit=my_error_exit;
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this->jerr.pub.output_message=my_output_message;
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if(setjmp(this->jerr.setjmp_buffer))
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{
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/* If we get here, the JPEG code has signaled an error. */
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if(this) free(this); return NULL;
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}
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jpeg_create_compress(&this->cinfo);
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/* Make an initial call so it will create the destination manager */
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jpeg_mem_dest_tj(&this->cinfo, &buf, &size, 0);
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this->init|=COMPRESS;
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return (tjhandle)this;
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}
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DLLEXPORT tjhandle DLLCALL tjInitCompress(void)
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{
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tjinstance *this=NULL;
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if((this=(tjinstance *)malloc(sizeof(tjinstance)))==NULL)
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{
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snprintf(errStr, JMSG_LENGTH_MAX,
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"tjInitCompress(): Memory allocation failure");
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return NULL;
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}
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MEMZERO(this, sizeof(tjinstance));
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return _tjInitCompress(this);
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}
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DLLEXPORT unsigned long DLLCALL tjBufSize(int width, int height,
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int jpegSubsamp)
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{
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unsigned long retval=0; int mcuw, mcuh, chromasf;
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if(width<1 || height<1 || jpegSubsamp<0 || jpegSubsamp>=NUMSUBOPT)
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_throw("tjBufSize(): Invalid argument");
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// This allows for rare corner cases in which a JPEG image can actually be
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// larger than the uncompressed input (we wouldn't mention it if it hadn't
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// happened before.)
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mcuw=tjMCUWidth[jpegSubsamp];
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mcuh=tjMCUHeight[jpegSubsamp];
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chromasf=jpegSubsamp==TJSAMP_GRAY? 0: 4*64/(mcuw*mcuh);
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retval=PAD(width, mcuw) * PAD(height, mcuh) * (2 + chromasf) + 2048;
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bailout:
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return retval;
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}
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DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height)
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{
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unsigned long retval=0;
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if(width<1 || height<1)
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_throw("TJBUFSIZE(): Invalid argument");
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// This allows for rare corner cases in which a JPEG image can actually be
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// larger than the uncompressed input (we wouldn't mention it if it hadn't
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// happened before.)
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retval=PAD(width, 16) * PAD(height, 16) * 6 + 2048;
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bailout:
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return retval;
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}
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DLLEXPORT unsigned long DLLCALL tjBufSizeYUV(int width, int height,
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int subsamp)
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{
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unsigned long retval=0;
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int pw, ph, cw, ch;
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if(width<1 || height<1 || subsamp<0 || subsamp>=NUMSUBOPT)
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_throw("tjBufSizeYUV(): Invalid argument");
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pw=PAD(width, tjMCUWidth[subsamp]/8);
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ph=PAD(height, tjMCUHeight[subsamp]/8);
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cw=pw*8/tjMCUWidth[subsamp]; ch=ph*8/tjMCUHeight[subsamp];
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retval=PAD(pw, 4)*ph + (subsamp==TJSAMP_GRAY? 0:PAD(cw, 4)*ch*2);
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bailout:
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return retval;
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}
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DLLEXPORT unsigned long DLLCALL TJBUFSIZEYUV(int width, int height,
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int subsamp)
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{
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return tjBufSizeYUV(width, height, subsamp);
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}
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DLLEXPORT int DLLCALL tjCompress2(tjhandle handle, unsigned char *srcBuf,
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int width, int pitch, int height, int pixelFormat, unsigned char **jpegBuf,
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unsigned long *jpegSize, int jpegSubsamp, int jpegQual, int flags)
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{
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int i, retval=0, alloc=1; JSAMPROW *row_pointer=NULL;
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getinstance(handle)
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if((this->init&COMPRESS)==0)
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_throw("tjCompress2(): Instance has not been initialized for compression");
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if(srcBuf==NULL || width<=0 || pitch<0 || height<=0 || pixelFormat<0
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|| pixelFormat>=TJ_NUMPF || jpegBuf==NULL || jpegSize==NULL
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|| jpegSubsamp<0 || jpegSubsamp>=NUMSUBOPT || jpegQual<0 || jpegQual>100)
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_throw("tjCompress2(): Invalid argument");
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if(setjmp(this->jerr.setjmp_buffer))
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{
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/* If we get here, the JPEG code has signaled an error. */
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retval=-1;
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goto bailout;
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}
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if(pitch==0) pitch=width*tjPixelSize[pixelFormat];
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cinfo->image_width=width;
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cinfo->image_height=height;
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if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
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else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
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else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
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if(flags&TJFLAG_NOREALLOC)
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{
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alloc=0; *jpegSize=tjBufSize(width, height, jpegSubsamp);
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}
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jpeg_mem_dest_tj(cinfo, jpegBuf, jpegSize, alloc);
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if(setCompDefaults(cinfo, pixelFormat, jpegSubsamp, jpegQual)==-1)
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return -1;
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jpeg_start_compress(cinfo, TRUE);
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if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL)
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_throw("tjCompress2(): Memory allocation failure");
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for(i=0; i<height; i++)
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{
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if(flags&TJFLAG_BOTTOMUP) row_pointer[i]=&srcBuf[(height-i-1)*pitch];
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else row_pointer[i]=&srcBuf[i*pitch];
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}
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while(cinfo->next_scanline<cinfo->image_height)
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{
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jpeg_write_scanlines(cinfo, &row_pointer[cinfo->next_scanline],
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cinfo->image_height-cinfo->next_scanline);
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}
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jpeg_finish_compress(cinfo);
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bailout:
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if(cinfo->global_state>CSTATE_START) jpeg_abort_compress(cinfo);
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if(row_pointer) free(row_pointer);
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return retval;
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}
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DLLEXPORT int DLLCALL tjCompress(tjhandle handle, unsigned char *srcBuf,
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int width, int pitch, int height, int pixelSize, unsigned char *jpegBuf,
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unsigned long *jpegSize, int jpegSubsamp, int jpegQual, int flags)
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{
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int retval=0; unsigned long size;
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if(flags&TJ_YUV)
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{
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size=tjBufSizeYUV(width, height, jpegSubsamp);
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retval=tjEncodeYUV2(handle, srcBuf, width, pitch, height,
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getPixelFormat(pixelSize, flags), jpegBuf, jpegSubsamp, flags);
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}
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else
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{
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retval=tjCompress2(handle, srcBuf, width, pitch, height,
|
|
getPixelFormat(pixelSize, flags), &jpegBuf, &size, jpegSubsamp, jpegQual,
|
|
flags|TJFLAG_NOREALLOC);
|
|
}
|
|
*jpegSize=size;
|
|
return retval;
|
|
}
|
|
|
|
|
|
DLLEXPORT int DLLCALL tjEncodeYUV2(tjhandle handle, unsigned char *srcBuf,
|
|
int width, int pitch, int height, int pixelFormat, unsigned char *dstBuf,
|
|
int subsamp, int flags)
|
|
{
|
|
int i, retval=0; JSAMPROW *row_pointer=NULL;
|
|
JSAMPLE *_tmpbuf[MAX_COMPONENTS], *_tmpbuf2[MAX_COMPONENTS];
|
|
JSAMPROW *tmpbuf[MAX_COMPONENTS], *tmpbuf2[MAX_COMPONENTS];
|
|
JSAMPROW *outbuf[MAX_COMPONENTS];
|
|
int row, pw, ph, cw[MAX_COMPONENTS], ch[MAX_COMPONENTS];
|
|
JSAMPLE *ptr=dstBuf;
|
|
unsigned long yuvsize=0;
|
|
jpeg_component_info *compptr;
|
|
|
|
getinstance(handle);
|
|
if((this->init&COMPRESS)==0)
|
|
_throw("tjEncodeYUV2(): Instance has not been initialized for compression");
|
|
|
|
for(i=0; i<MAX_COMPONENTS; i++)
|
|
{
|
|
tmpbuf[i]=NULL; _tmpbuf[i]=NULL;
|
|
tmpbuf2[i]=NULL; _tmpbuf2[i]=NULL; outbuf[i]=NULL;
|
|
}
|
|
|
|
if(srcBuf==NULL || width<=0 || pitch<0 || height<=0 || pixelFormat<0
|
|
|| pixelFormat>=TJ_NUMPF || dstBuf==NULL || subsamp<0
|
|
|| subsamp>=NUMSUBOPT)
|
|
_throw("tjEncodeYUV2(): Invalid argument");
|
|
|
|
if(setjmp(this->jerr.setjmp_buffer))
|
|
{
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval=-1;
|
|
goto bailout;
|
|
}
|
|
|
|
if(pitch==0) pitch=width*tjPixelSize[pixelFormat];
|
|
|
|
cinfo->image_width=width;
|
|
cinfo->image_height=height;
|
|
|
|
if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
|
|
else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
|
|
else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
|
|
|
|
yuvsize=tjBufSizeYUV(width, height, subsamp);
|
|
jpeg_mem_dest_tj(cinfo, &dstBuf, &yuvsize, 0);
|
|
if(setCompDefaults(cinfo, pixelFormat, subsamp, -1)==-1) return -1;
|
|
|
|
jpeg_start_compress(cinfo, TRUE);
|
|
pw=PAD(width, cinfo->max_h_samp_factor);
|
|
ph=PAD(height, cinfo->max_v_samp_factor);
|
|
|
|
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph))==NULL)
|
|
_throw("tjEncodeYUV2(): Memory allocation failure");
|
|
for(i=0; i<height; i++)
|
|
{
|
|
if(flags&TJFLAG_BOTTOMUP) row_pointer[i]=&srcBuf[(height-i-1)*pitch];
|
|
else row_pointer[i]=&srcBuf[i*pitch];
|
|
}
|
|
if(height<ph)
|
|
for(i=height; i<ph; i++) row_pointer[i]=row_pointer[height-1];
|
|
|
|
for(i=0; i<cinfo->num_components; i++)
|
|
{
|
|
compptr=&cinfo->comp_info[i];
|
|
_tmpbuf[i]=(JSAMPLE *)malloc(
|
|
PAD((compptr->width_in_blocks*cinfo->max_h_samp_factor*DCTSIZE)
|
|
/compptr->h_samp_factor, 16) * cinfo->max_v_samp_factor + 16);
|
|
if(!_tmpbuf[i]) _throw("tjEncodeYUV2(): Memory allocation failure");
|
|
tmpbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*cinfo->max_v_samp_factor);
|
|
if(!tmpbuf[i]) _throw("tjEncodeYUV2(): Memory allocation failure");
|
|
for(row=0; row<cinfo->max_v_samp_factor; row++)
|
|
{
|
|
unsigned char *_tmpbuf_aligned=
|
|
(unsigned char *)PAD((size_t)_tmpbuf[i], 16);
|
|
tmpbuf[i][row]=&_tmpbuf_aligned[
|
|
PAD((compptr->width_in_blocks*cinfo->max_h_samp_factor*DCTSIZE)
|
|
/compptr->h_samp_factor, 16) * row];
|
|
}
|
|
_tmpbuf2[i]=(JSAMPLE *)malloc(PAD(compptr->width_in_blocks*DCTSIZE, 16)
|
|
* compptr->v_samp_factor + 16);
|
|
if(!_tmpbuf2[i]) _throw("tjEncodeYUV2(): Memory allocation failure");
|
|
tmpbuf2[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*compptr->v_samp_factor);
|
|
if(!tmpbuf2[i]) _throw("tjEncodeYUV2(): Memory allocation failure");
|
|
for(row=0; row<compptr->v_samp_factor; row++)
|
|
{
|
|
unsigned char *_tmpbuf2_aligned=
|
|
(unsigned char *)PAD((size_t)_tmpbuf2[i], 16);
|
|
tmpbuf2[i][row]=&_tmpbuf2_aligned[
|
|
PAD(compptr->width_in_blocks*DCTSIZE, 16) * row];
|
|
}
|
|
cw[i]=pw*compptr->h_samp_factor/cinfo->max_h_samp_factor;
|
|
ch[i]=ph*compptr->v_samp_factor/cinfo->max_v_samp_factor;
|
|
outbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ch[i]);
|
|
if(!outbuf[i]) _throw("tjEncodeYUV2(): Memory allocation failure");
|
|
for(row=0; row<ch[i]; row++)
|
|
{
|
|
outbuf[i][row]=ptr;
|
|
ptr+=PAD(cw[i], 4);
|
|
}
|
|
}
|
|
if(yuvsize!=(unsigned long)(ptr-dstBuf))
|
|
_throw("tjEncodeYUV2(): Generated image is not the correct size");
|
|
|
|
for(row=0; row<ph; row+=cinfo->max_v_samp_factor)
|
|
{
|
|
(*cinfo->cconvert->color_convert)(cinfo, &row_pointer[row], tmpbuf, 0,
|
|
cinfo->max_v_samp_factor);
|
|
(cinfo->downsample->downsample)(cinfo, tmpbuf, 0, tmpbuf2, 0);
|
|
for(i=0, compptr=cinfo->comp_info; i<cinfo->num_components; i++, compptr++)
|
|
jcopy_sample_rows(tmpbuf2[i], 0, outbuf[i],
|
|
row*compptr->v_samp_factor/cinfo->max_v_samp_factor,
|
|
compptr->v_samp_factor, cw[i]);
|
|
}
|
|
cinfo->next_scanline+=height;
|
|
jpeg_abort_compress(cinfo);
|
|
|
|
bailout:
|
|
if(cinfo->global_state>CSTATE_START) jpeg_abort_compress(cinfo);
|
|
if(row_pointer) free(row_pointer);
|
|
for(i=0; i<MAX_COMPONENTS; i++)
|
|
{
|
|
if(tmpbuf[i]!=NULL) free(tmpbuf[i]);
|
|
if(_tmpbuf[i]!=NULL) free(_tmpbuf[i]);
|
|
if(tmpbuf2[i]!=NULL) free(tmpbuf2[i]);
|
|
if(_tmpbuf2[i]!=NULL) free(_tmpbuf2[i]);
|
|
if(outbuf[i]!=NULL) free(outbuf[i]);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
DLLEXPORT int DLLCALL tjEncodeYUV(tjhandle handle, unsigned char *srcBuf,
|
|
int width, int pitch, int height, int pixelSize, unsigned char *dstBuf,
|
|
int subsamp, int flags)
|
|
{
|
|
return tjEncodeYUV2(handle, srcBuf, width, pitch, height,
|
|
getPixelFormat(pixelSize, flags), dstBuf, subsamp, flags);
|
|
}
|
|
|
|
|
|
/* Decompressor */
|
|
|
|
static tjhandle _tjInitDecompress(tjinstance *this)
|
|
{
|
|
unsigned char buffer[1];
|
|
|
|
/* This is also straight out of example.c */
|
|
this->dinfo.err=jpeg_std_error(&this->jerr.pub);
|
|
this->jerr.pub.error_exit=my_error_exit;
|
|
this->jerr.pub.output_message=my_output_message;
|
|
|
|
if(setjmp(this->jerr.setjmp_buffer))
|
|
{
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
if(this) free(this); return NULL;
|
|
}
|
|
|
|
jpeg_create_decompress(&this->dinfo);
|
|
/* Make an initial call so it will create the source manager */
|
|
jpeg_mem_src_tj(&this->dinfo, buffer, 1);
|
|
|
|
this->init|=DECOMPRESS;
|
|
return (tjhandle)this;
|
|
}
|
|
|
|
DLLEXPORT tjhandle DLLCALL tjInitDecompress(void)
|
|
{
|
|
tjinstance *this;
|
|
if((this=(tjinstance *)malloc(sizeof(tjinstance)))==NULL)
|
|
{
|
|
snprintf(errStr, JMSG_LENGTH_MAX,
|
|
"tjInitDecompress(): Memory allocation failure");
|
|
return NULL;
|
|
}
|
|
MEMZERO(this, sizeof(tjinstance));
|
|
return _tjInitDecompress(this);
|
|
}
|
|
|
|
|
|
DLLEXPORT int DLLCALL tjDecompressHeader2(tjhandle handle,
|
|
unsigned char *jpegBuf, unsigned long jpegSize, int *width, int *height,
|
|
int *jpegSubsamp)
|
|
{
|
|
int retval=0;
|
|
|
|
getinstance(handle);
|
|
if((this->init&DECOMPRESS)==0)
|
|
_throw("tjDecompressHeader2(): Instance has not been initialized for decompression");
|
|
|
|
if(jpegBuf==NULL || jpegSize<=0 || width==NULL || height==NULL
|
|
|| jpegSubsamp==NULL)
|
|
_throw("tjDecompressHeader2(): Invalid argument");
|
|
|
|
if(setjmp(this->jerr.setjmp_buffer))
|
|
{
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
return -1;
|
|
}
|
|
|
|
jpeg_mem_src_tj(dinfo, jpegBuf, jpegSize);
|
|
jpeg_read_header(dinfo, TRUE);
|
|
|
|
*width=dinfo->image_width;
|
|
*height=dinfo->image_height;
|
|
*jpegSubsamp=getSubsamp(dinfo);
|
|
|
|
jpeg_abort_decompress(dinfo);
|
|
|
|
if(*jpegSubsamp<0)
|
|
_throw("tjDecompressHeader2(): Could not determine subsampling type for JPEG image");
|
|
if(*width<1 || *height<1)
|
|
_throw("tjDecompressHeader2(): Invalid data returned in header");
|
|
|
|
bailout:
|
|
return retval;
|
|
}
|
|
|
|
DLLEXPORT int DLLCALL tjDecompressHeader(tjhandle handle,
|
|
unsigned char *jpegBuf, unsigned long jpegSize, int *width, int *height)
|
|
{
|
|
int jpegSubsamp;
|
|
return tjDecompressHeader2(handle, jpegBuf, jpegSize, width, height,
|
|
&jpegSubsamp);
|
|
}
|
|
|
|
|
|
DLLEXPORT tjscalingfactor* DLLCALL tjGetScalingFactors(int *numscalingfactors)
|
|
{
|
|
if(numscalingfactors==NULL)
|
|
{
|
|
snprintf(errStr, JMSG_LENGTH_MAX,
|
|
"tjGetScalingFactors(): Invalid argument");
|
|
return NULL;
|
|
}
|
|
|
|
*numscalingfactors=NUMSF;
|
|
return (tjscalingfactor *)sf;
|
|
}
|
|
|
|
|
|
DLLEXPORT int DLLCALL tjDecompress2(tjhandle handle, unsigned char *jpegBuf,
|
|
unsigned long jpegSize, unsigned char *dstBuf, int width, int pitch,
|
|
int height, int pixelFormat, int flags)
|
|
{
|
|
int i, retval=0; JSAMPROW *row_pointer=NULL;
|
|
int jpegwidth, jpegheight, scaledw, scaledh;
|
|
|
|
getinstance(handle);
|
|
if((this->init&DECOMPRESS)==0)
|
|
_throw("tjDecompress2(): Instance has not been initialized for decompression");
|
|
|
|
if(jpegBuf==NULL || jpegSize<=0 || dstBuf==NULL || width<0 || pitch<0
|
|
|| height<0 || pixelFormat<0 || pixelFormat>=TJ_NUMPF)
|
|
_throw("tjDecompress2(): Invalid argument");
|
|
|
|
if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
|
|
else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
|
|
else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
|
|
|
|
if(setjmp(this->jerr.setjmp_buffer))
|
|
{
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval=-1;
|
|
goto bailout;
|
|
}
|
|
|
|
jpeg_mem_src_tj(dinfo, jpegBuf, jpegSize);
|
|
jpeg_read_header(dinfo, TRUE);
|
|
if(setDecompDefaults(dinfo, pixelFormat)==-1) return -1;
|
|
|
|
if(flags&TJFLAG_FASTUPSAMPLE) dinfo->do_fancy_upsampling=FALSE;
|
|
|
|
jpegwidth=dinfo->image_width; jpegheight=dinfo->image_height;
|
|
if(width==0) width=jpegwidth;
|
|
if(height==0) height=jpegheight;
|
|
for(i=0; i<NUMSF; i++)
|
|
{
|
|
scaledw=TJSCALED(jpegwidth, sf[i]);
|
|
scaledh=TJSCALED(jpegheight, sf[i]);
|
|
if(scaledw<=width && scaledh<=height)
|
|
break;
|
|
}
|
|
if(scaledw>width || scaledh>height)
|
|
_throw("tjDecompress2(): Could not scale down to desired image dimensions");
|
|
width=scaledw; height=scaledh;
|
|
dinfo->scale_num=sf[i].num;
|
|
dinfo->scale_denom=sf[i].denom;
|
|
|
|
jpeg_start_decompress(dinfo);
|
|
if(pitch==0) pitch=dinfo->output_width*tjPixelSize[pixelFormat];
|
|
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)
|
|
*dinfo->output_height))==NULL)
|
|
_throw("tjDecompress2(): Memory allocation failure");
|
|
for(i=0; i<(int)dinfo->output_height; i++)
|
|
{
|
|
if(flags&TJFLAG_BOTTOMUP)
|
|
row_pointer[i]=&dstBuf[(dinfo->output_height-i-1)*pitch];
|
|
else row_pointer[i]=&dstBuf[i*pitch];
|
|
}
|
|
while(dinfo->output_scanline<dinfo->output_height)
|
|
{
|
|
jpeg_read_scanlines(dinfo, &row_pointer[dinfo->output_scanline],
|
|
dinfo->output_height-dinfo->output_scanline);
|
|
}
|
|
jpeg_finish_decompress(dinfo);
|
|
|
|
bailout:
|
|
if(dinfo->global_state>DSTATE_START) jpeg_abort_decompress(dinfo);
|
|
if(row_pointer) free(row_pointer);
|
|
return retval;
|
|
}
|
|
|
|
DLLEXPORT int DLLCALL tjDecompress(tjhandle handle, unsigned char *jpegBuf,
|
|
unsigned long jpegSize, unsigned char *dstBuf, int width, int pitch,
|
|
int height, int pixelSize, int flags)
|
|
{
|
|
if(flags&TJ_YUV)
|
|
return tjDecompressToYUV(handle, jpegBuf, jpegSize, dstBuf, flags);
|
|
else
|
|
return tjDecompress2(handle, jpegBuf, jpegSize, dstBuf, width, pitch,
|
|
height, getPixelFormat(pixelSize, flags), flags);
|
|
}
|
|
|
|
|
|
DLLEXPORT int DLLCALL tjDecompressToYUV(tjhandle handle,
|
|
unsigned char *jpegBuf, unsigned long jpegSize, unsigned char *dstBuf,
|
|
int flags)
|
|
{
|
|
int i, row, retval=0; JSAMPROW *outbuf[MAX_COMPONENTS];
|
|
int cw[MAX_COMPONENTS], ch[MAX_COMPONENTS], iw[MAX_COMPONENTS],
|
|
tmpbufsize=0, usetmpbuf=0, th[MAX_COMPONENTS];
|
|
JSAMPLE *_tmpbuf=NULL, *ptr=dstBuf; JSAMPROW *tmpbuf[MAX_COMPONENTS];
|
|
|
|
getinstance(handle);
|
|
if((this->init&DECOMPRESS)==0)
|
|
_throw("tjDecompressToYUV(): Instance has not been initialized for decompression");
|
|
|
|
for(i=0; i<MAX_COMPONENTS; i++)
|
|
{
|
|
tmpbuf[i]=NULL; outbuf[i]=NULL;
|
|
}
|
|
|
|
if(jpegBuf==NULL || jpegSize<=0 || dstBuf==NULL)
|
|
_throw("tjDecompressToYUV(): Invalid argument");
|
|
|
|
if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
|
|
else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
|
|
else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
|
|
|
|
if(setjmp(this->jerr.setjmp_buffer))
|
|
{
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval=-1;
|
|
goto bailout;
|
|
}
|
|
|
|
jpeg_mem_src_tj(dinfo, jpegBuf, jpegSize);
|
|
jpeg_read_header(dinfo, TRUE);
|
|
|
|
for(i=0; i<dinfo->num_components; i++)
|
|
{
|
|
jpeg_component_info *compptr=&dinfo->comp_info[i];
|
|
int ih;
|
|
iw[i]=compptr->width_in_blocks*DCTSIZE;
|
|
ih=compptr->height_in_blocks*DCTSIZE;
|
|
cw[i]=PAD(dinfo->image_width, dinfo->max_h_samp_factor)
|
|
*compptr->h_samp_factor/dinfo->max_h_samp_factor;
|
|
ch[i]=PAD(dinfo->image_height, dinfo->max_v_samp_factor)
|
|
*compptr->v_samp_factor/dinfo->max_v_samp_factor;
|
|
if(iw[i]!=cw[i] || ih!=ch[i]) usetmpbuf=1;
|
|
th[i]=compptr->v_samp_factor*DCTSIZE;
|
|
tmpbufsize+=iw[i]*th[i];
|
|
if((outbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ch[i]))==NULL)
|
|
_throw("tjDecompressToYUV(): Memory allocation failure");
|
|
for(row=0; row<ch[i]; row++)
|
|
{
|
|
outbuf[i][row]=ptr;
|
|
ptr+=PAD(cw[i], 4);
|
|
}
|
|
}
|
|
if(usetmpbuf)
|
|
{
|
|
if((_tmpbuf=(JSAMPLE *)malloc(sizeof(JSAMPLE)*tmpbufsize))==NULL)
|
|
_throw("tjDecompressToYUV(): Memory allocation failure");
|
|
ptr=_tmpbuf;
|
|
for(i=0; i<dinfo->num_components; i++)
|
|
{
|
|
if((tmpbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*th[i]))==NULL)
|
|
_throw("tjDecompressToYUV(): Memory allocation failure");
|
|
for(row=0; row<th[i]; row++)
|
|
{
|
|
tmpbuf[i][row]=ptr;
|
|
ptr+=iw[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
if(flags&TJFLAG_FASTUPSAMPLE) dinfo->do_fancy_upsampling=FALSE;
|
|
dinfo->raw_data_out=TRUE;
|
|
|
|
jpeg_start_decompress(dinfo);
|
|
for(row=0; row<(int)dinfo->output_height;
|
|
row+=dinfo->max_v_samp_factor*DCTSIZE)
|
|
{
|
|
JSAMPARRAY yuvptr[MAX_COMPONENTS];
|
|
int crow[MAX_COMPONENTS];
|
|
for(i=0; i<dinfo->num_components; i++)
|
|
{
|
|
jpeg_component_info *compptr=&dinfo->comp_info[i];
|
|
crow[i]=row*compptr->v_samp_factor/dinfo->max_v_samp_factor;
|
|
if(usetmpbuf) yuvptr[i]=tmpbuf[i];
|
|
else yuvptr[i]=&outbuf[i][crow[i]];
|
|
}
|
|
jpeg_read_raw_data(dinfo, yuvptr, dinfo->max_v_samp_factor*DCTSIZE);
|
|
if(usetmpbuf)
|
|
{
|
|
int j;
|
|
for(i=0; i<dinfo->num_components; i++)
|
|
{
|
|
for(j=0; j<min(th[i], ch[i]-crow[i]); j++)
|
|
{
|
|
memcpy(outbuf[i][crow[i]+j], tmpbuf[i][j], cw[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
jpeg_finish_decompress(dinfo);
|
|
|
|
bailout:
|
|
if(dinfo->global_state>DSTATE_START) jpeg_abort_decompress(dinfo);
|
|
for(i=0; i<MAX_COMPONENTS; i++)
|
|
{
|
|
if(tmpbuf[i]) free(tmpbuf[i]);
|
|
if(outbuf[i]) free(outbuf[i]);
|
|
}
|
|
if(_tmpbuf) free(_tmpbuf);
|
|
return retval;
|
|
}
|
|
|
|
|
|
/* Transformer */
|
|
|
|
DLLEXPORT tjhandle DLLCALL tjInitTransform(void)
|
|
{
|
|
tjinstance *this=NULL; tjhandle handle=NULL;
|
|
if((this=(tjinstance *)malloc(sizeof(tjinstance)))==NULL)
|
|
{
|
|
snprintf(errStr, JMSG_LENGTH_MAX,
|
|
"tjInitTransform(): Memory allocation failure");
|
|
return NULL;
|
|
}
|
|
MEMZERO(this, sizeof(tjinstance));
|
|
handle=_tjInitCompress(this);
|
|
if(!handle) return NULL;
|
|
handle=_tjInitDecompress(this);
|
|
return handle;
|
|
}
|
|
|
|
|
|
DLLEXPORT int DLLCALL tjTransform(tjhandle handle, unsigned char *jpegBuf,
|
|
unsigned long jpegSize, int n, unsigned char **dstBufs,
|
|
unsigned long *dstSizes, tjtransform *t, int flags)
|
|
{
|
|
jpeg_transform_info *xinfo=NULL;
|
|
jvirt_barray_ptr *srccoefs, *dstcoefs;
|
|
int retval=0, i, jpegSubsamp;
|
|
|
|
getinstance(handle);
|
|
if((this->init&COMPRESS)==0 || (this->init&DECOMPRESS)==0)
|
|
_throw("tjTransform(): Instance has not been initialized for transformation");
|
|
|
|
if(jpegBuf==NULL || jpegSize<=0 || n<1 || dstBufs==NULL || dstSizes==NULL
|
|
|| t==NULL || flags<0)
|
|
_throw("tjTransform(): Invalid argument");
|
|
|
|
if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
|
|
else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
|
|
else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
|
|
|
|
if(setjmp(this->jerr.setjmp_buffer))
|
|
{
|
|
/* If we get here, the JPEG code has signaled an error. */
|
|
retval=-1;
|
|
goto bailout;
|
|
}
|
|
|
|
jpeg_mem_src_tj(dinfo, jpegBuf, jpegSize);
|
|
|
|
if((xinfo=(jpeg_transform_info *)malloc(sizeof(jpeg_transform_info)*n))
|
|
==NULL)
|
|
_throw("tjTransform(): Memory allocation failure");
|
|
MEMZERO(xinfo, sizeof(jpeg_transform_info)*n);
|
|
|
|
for(i=0; i<n; i++)
|
|
{
|
|
xinfo[i].transform=xformtypes[t[i].op];
|
|
xinfo[i].perfect=(t[i].options&TJXOPT_PERFECT)? 1:0;
|
|
xinfo[i].trim=(t[i].options&TJXOPT_TRIM)? 1:0;
|
|
xinfo[i].force_grayscale=(t[i].options&TJXOPT_GRAY)? 1:0;
|
|
xinfo[i].crop=(t[i].options&TJXOPT_CROP)? 1:0;
|
|
if(n!=1 && t[i].op==TJXOP_HFLIP) xinfo[i].slow_hflip=1;
|
|
else xinfo[i].slow_hflip=0;
|
|
|
|
if(xinfo[i].crop)
|
|
{
|
|
xinfo[i].crop_xoffset=t[i].r.x; xinfo[i].crop_xoffset_set=JCROP_POS;
|
|
xinfo[i].crop_yoffset=t[i].r.y; xinfo[i].crop_yoffset_set=JCROP_POS;
|
|
if(t[i].r.w!=0)
|
|
{
|
|
xinfo[i].crop_width=t[i].r.w; xinfo[i].crop_width_set=JCROP_POS;
|
|
}
|
|
else xinfo[i].crop_width=JCROP_UNSET;
|
|
if(t[i].r.h!=0)
|
|
{
|
|
xinfo[i].crop_height=t[i].r.h; xinfo[i].crop_height_set=JCROP_POS;
|
|
}
|
|
else xinfo[i].crop_height=JCROP_UNSET;
|
|
}
|
|
}
|
|
|
|
jcopy_markers_setup(dinfo, JCOPYOPT_ALL);
|
|
jpeg_read_header(dinfo, TRUE);
|
|
jpegSubsamp=getSubsamp(dinfo);
|
|
if(jpegSubsamp<0)
|
|
_throw("tjTransform(): Could not determine subsampling type for JPEG image");
|
|
|
|
for(i=0; i<n; i++)
|
|
{
|
|
if(!jtransform_request_workspace(dinfo, &xinfo[i]))
|
|
_throw("tjTransform(): Transform is not perfect");
|
|
|
|
if(xinfo[i].crop)
|
|
{
|
|
if((t[i].r.x%xinfo[i].iMCU_sample_width)!=0
|
|
|| (t[i].r.y%xinfo[i].iMCU_sample_height)!=0)
|
|
{
|
|
snprintf(errStr, JMSG_LENGTH_MAX,
|
|
"To crop this JPEG image, x must be a multiple of %d\n"
|
|
"and y must be a multiple of %d.\n",
|
|
xinfo[i].iMCU_sample_width, xinfo[i].iMCU_sample_height);
|
|
retval=-1; goto bailout;
|
|
}
|
|
}
|
|
}
|
|
|
|
srccoefs=jpeg_read_coefficients(dinfo);
|
|
|
|
for(i=0; i<n; i++)
|
|
{
|
|
int w, h, alloc=1;
|
|
if(!xinfo[i].crop)
|
|
{
|
|
w=dinfo->image_width; h=dinfo->image_height;
|
|
}
|
|
else
|
|
{
|
|
w=xinfo[i].crop_width; h=xinfo[i].crop_height;
|
|
}
|
|
if(flags&TJFLAG_NOREALLOC)
|
|
{
|
|
alloc=0; dstSizes[i]=tjBufSize(w, h, jpegSubsamp);
|
|
}
|
|
if(!(t[i].options&TJXOPT_NOOUTPUT))
|
|
jpeg_mem_dest_tj(cinfo, &dstBufs[i], &dstSizes[i], alloc);
|
|
jpeg_copy_critical_parameters(dinfo, cinfo);
|
|
dstcoefs=jtransform_adjust_parameters(dinfo, cinfo, srccoefs,
|
|
&xinfo[i]);
|
|
if(!(t[i].options&TJXOPT_NOOUTPUT))
|
|
{
|
|
jpeg_write_coefficients(cinfo, dstcoefs);
|
|
jcopy_markers_execute(dinfo, cinfo, JCOPYOPT_ALL);
|
|
}
|
|
else jinit_c_master_control(cinfo, TRUE);
|
|
jtransform_execute_transformation(dinfo, cinfo, srccoefs,
|
|
&xinfo[i]);
|
|
if(t[i].customFilter)
|
|
{
|
|
int ci, y; JDIMENSION by;
|
|
for(ci=0; ci<cinfo->num_components; ci++)
|
|
{
|
|
jpeg_component_info *compptr=&cinfo->comp_info[ci];
|
|
tjregion arrayRegion={0, 0, compptr->width_in_blocks*DCTSIZE,
|
|
DCTSIZE};
|
|
tjregion planeRegion={0, 0, compptr->width_in_blocks*DCTSIZE,
|
|
compptr->height_in_blocks*DCTSIZE};
|
|
for(by=0; by<compptr->height_in_blocks; by+=compptr->v_samp_factor)
|
|
{
|
|
JBLOCKARRAY barray=(dinfo->mem->access_virt_barray)
|
|
((j_common_ptr)dinfo, dstcoefs[ci], by, compptr->v_samp_factor,
|
|
TRUE);
|
|
for(y=0; y<compptr->v_samp_factor; y++)
|
|
{
|
|
if(t[i].customFilter(barray[y][0], arrayRegion, planeRegion,
|
|
ci, i, &t[i])==-1)
|
|
_throw("tjTransform(): Error in custom filter");
|
|
arrayRegion.y+=DCTSIZE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(!(t[i].options&TJXOPT_NOOUTPUT)) jpeg_finish_compress(cinfo);
|
|
}
|
|
|
|
jpeg_finish_decompress(dinfo);
|
|
|
|
bailout:
|
|
if(cinfo->global_state>CSTATE_START) jpeg_abort_compress(cinfo);
|
|
if(dinfo->global_state>DSTATE_START) jpeg_abort_decompress(dinfo);
|
|
if(xinfo) free(xinfo);
|
|
return retval;
|
|
}
|