170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * jcmaster.c 370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Copyright (C) 1991-1997, Thomas G. Lane. 570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This file is part of the Independent JPEG Group's software. 670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * For conditions of distribution and use, see the accompanying README file. 770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This file contains master control logic for the JPEG compressor. 970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * These routines are concerned with parameter validation, initial setup, 1070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * and inter-pass control (determining the number of passes and the work 1170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * to be done in each pass). 1270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 1370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 1470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#define JPEG_INTERNALS 1570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#include "jinclude.h" 1670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#include "jpeglib.h" 1770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 1870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 1970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Private state */ 2070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 2170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinetypedef enum { 2270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine main_pass, /* input data, also do first output step */ 2370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine huff_opt_pass, /* Huffman code optimization pass */ 2470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine output_pass /* data output pass */ 2570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} c_pass_type; 2670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 2770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinetypedef struct { 2870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine struct jpeg_comp_master pub; /* public fields */ 2970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine c_pass_type pass_type; /* the type of the current pass */ 3170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int pass_number; /* # of passes completed */ 3370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int total_passes; /* total # of passes needed */ 3470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int scan_number; /* current index in scan_info[] */ 3670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} my_comp_master; 3770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinetypedef my_comp_master * my_master_ptr; 3970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 4070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 4170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 4270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Support routines that do various essential calculations. 4370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 4470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 4570a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 4670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineinitial_setup (j_compress_ptr cinfo) 4770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Do computations that are needed before master selection phase */ 4870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 4970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int ci; 5070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 5170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine long samplesperrow; 5270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine JDIMENSION jd_samplesperrow; 5370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 5470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Sanity check on image dimensions */ 5570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->image_height <= 0 || cinfo->image_width <= 0 5670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine || cinfo->num_components <= 0 || cinfo->input_components <= 0) 5770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_EMPTY_IMAGE); 5870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 5970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Make sure image isn't bigger than I can handle */ 6070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION || 6170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION) 6270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION); 6370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 6470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Width of an input scanline must be representable as JDIMENSION. */ 6570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components; 6670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jd_samplesperrow = (JDIMENSION) samplesperrow; 6770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if ((long) jd_samplesperrow != samplesperrow) 6870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_WIDTH_OVERFLOW); 6970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 7070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For now, precision must match compiled-in value... */ 7170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->data_precision != BITS_IN_JSAMPLE) 7270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision); 7370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 7470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Check that number of components won't exceed internal array sizes */ 7570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->num_components > MAX_COMPONENTS) 7670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 7770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine MAX_COMPONENTS); 7870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 7970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Compute maximum sampling factors; check factor validity */ 8070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->max_h_samp_factor = 1; 8170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->max_v_samp_factor = 1; 8270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 8370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ci++, compptr++) { 8470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR || 8570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR) 8670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_BAD_SAMPLING); 8770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor, 8870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->h_samp_factor); 8970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, 9070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->v_samp_factor); 9170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 9270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 9370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Compute dimensions of components */ 9470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 9570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ci++, compptr++) { 9670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Fill in the correct component_index value; don't rely on application */ 9770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->component_index = ci; 9870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For compression, we never do DCT scaling. */ 9970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->DCT_scaled_size = DCTSIZE; 10070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Size in DCT blocks */ 10170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->width_in_blocks = (JDIMENSION) 10270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 10370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) (cinfo->max_h_samp_factor * DCTSIZE)); 10470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->height_in_blocks = (JDIMENSION) 10570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 10670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) (cinfo->max_v_samp_factor * DCTSIZE)); 10770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Size in samples */ 10870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->downsampled_width = (JDIMENSION) 10970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 11070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) cinfo->max_h_samp_factor); 11170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->downsampled_height = (JDIMENSION) 11270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 11370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) cinfo->max_v_samp_factor); 11470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Mark component needed (this flag isn't actually used for compression) */ 11570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->component_needed = TRUE; 11670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 11770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 11870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Compute number of fully interleaved MCU rows (number of times that 11970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * main controller will call coefficient controller). 12070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 12170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->total_iMCU_rows = (JDIMENSION) 12270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_height, 12370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) (cinfo->max_v_samp_factor*DCTSIZE)); 12470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 12570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 12670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 12770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_MULTISCAN_FILES_SUPPORTED 12870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 12970a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 13070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinevalidate_script (j_compress_ptr cinfo) 13170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Verify that the scan script in cinfo->scan_info[] is valid; also 13270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * determine whether it uses progressive JPEG, and set cinfo->progressive_mode. 13370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 13470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 13570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine const jpeg_scan_info * scanptr; 13670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int scanno, ncomps, ci, coefi, thisi; 13770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int Ss, Se, Ah, Al; 13870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine boolean component_sent[MAX_COMPONENTS]; 13970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_PROGRESSIVE_SUPPORTED 14070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int * last_bitpos_ptr; 14170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int last_bitpos[MAX_COMPONENTS][DCTSIZE2]; 14270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* -1 until that coefficient has been seen; then last Al for it */ 14370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 14470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 14570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->num_scans <= 0) 14670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, 0); 14770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 14870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For sequential JPEG, all scans must have Ss=0, Se=DCTSIZE2-1; 14970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * for progressive JPEG, no scan can have this. 15070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 15170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine scanptr = cinfo->scan_info; 15270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (scanptr->Ss != 0 || scanptr->Se != DCTSIZE2-1) { 15370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_PROGRESSIVE_SUPPORTED 15470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->progressive_mode = TRUE; 15570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine last_bitpos_ptr = & last_bitpos[0][0]; 15670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < cinfo->num_components; ci++) 15770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (coefi = 0; coefi < DCTSIZE2; coefi++) 15870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine *last_bitpos_ptr++ = -1; 15970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#else 16070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_NOT_COMPILED); 16170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 16270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 16370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->progressive_mode = FALSE; 16470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < cinfo->num_components; ci++) 16570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine component_sent[ci] = FALSE; 16670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 16770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 16870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (scanno = 1; scanno <= cinfo->num_scans; scanptr++, scanno++) { 16970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Validate component indexes */ 17070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ncomps = scanptr->comps_in_scan; 17170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (ncomps <= 0 || ncomps > MAX_COMPS_IN_SCAN) 17270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT2(cinfo, JERR_COMPONENT_COUNT, ncomps, MAX_COMPS_IN_SCAN); 17370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < ncomps; ci++) { 17470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine thisi = scanptr->component_index[ci]; 17570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (thisi < 0 || thisi >= cinfo->num_components) 17670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 17770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Components must appear in SOF order within each scan */ 17870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (ci > 0 && thisi <= scanptr->component_index[ci-1]) 17970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 18070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 18170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Validate progression parameters */ 18270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine Ss = scanptr->Ss; 18370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine Se = scanptr->Se; 18470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine Ah = scanptr->Ah; 18570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine Al = scanptr->Al; 18670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progressive_mode) { 18770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_PROGRESSIVE_SUPPORTED 18870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* The JPEG spec simply gives the ranges 0..13 for Ah and Al, but that 18970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * seems wrong: the upper bound ought to depend on data precision. 19070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Perhaps they really meant 0..N+1 for N-bit precision. 19170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Here we allow 0..10 for 8-bit data; Al larger than 10 results in 19270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * out-of-range reconstructed DC values during the first DC scan, 19370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * which might cause problems for some decoders. 19470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 19570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#if BITS_IN_JSAMPLE == 8 19670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#define MAX_AH_AL 10 19770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#else 19870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#define MAX_AH_AL 13 19970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 20070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 || 20170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine Ah < 0 || Ah > MAX_AH_AL || Al < 0 || Al > MAX_AH_AL) 20270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 20370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Ss == 0) { 20470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Se != 0) /* DC and AC together not OK */ 20570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 20670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 20770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (ncomps != 1) /* AC scans must be for only one component */ 20870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 20970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 21070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < ncomps; ci++) { 21170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine last_bitpos_ptr = & last_bitpos[scanptr->component_index[ci]][0]; 21270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Ss != 0 && last_bitpos_ptr[0] < 0) /* AC without prior DC scan */ 21370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 21470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (coefi = Ss; coefi <= Se; coefi++) { 21570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (last_bitpos_ptr[coefi] < 0) { 21670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* first scan of this coefficient */ 21770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Ah != 0) 21870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 21970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 22070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* not first scan */ 22170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1) 22270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 22370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 22470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine last_bitpos_ptr[coefi] = Al; 22570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 22670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 22770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 22870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 22970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For sequential JPEG, all progression parameters must be these: */ 23070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0) 23170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 23270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Make sure components are not sent twice */ 23370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < ncomps; ci++) { 23470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine thisi = scanptr->component_index[ci]; 23570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (component_sent[thisi]) 23670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 23770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine component_sent[thisi] = TRUE; 23870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 23970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 24070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 24170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 24270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Now verify that everything got sent. */ 24370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progressive_mode) { 24470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_PROGRESSIVE_SUPPORTED 24570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For progressive mode, we only check that at least some DC data 24670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * got sent for each component; the spec does not require that all bits 24770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * of all coefficients be transmitted. Would it be wiser to enforce 24870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * transmission of all coefficient bits?? 24970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 25070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < cinfo->num_components; ci++) { 25170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (last_bitpos[ci][0] < 0) 25270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_MISSING_DATA); 25370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 25470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 25570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 25670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < cinfo->num_components; ci++) { 25770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! component_sent[ci]) 25870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_MISSING_DATA); 25970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 26070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 26170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 26270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 26370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif /* C_MULTISCAN_FILES_SUPPORTED */ 26470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 26570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 26670a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 26770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineselect_scan_parameters (j_compress_ptr cinfo) 26870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Set up the scan parameters for the current scan */ 26970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 27070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int ci; 27170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 27270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_MULTISCAN_FILES_SUPPORTED 27370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->scan_info != NULL) { 27470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Prepare for current scan --- the script is already validated */ 27570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_master_ptr master = (my_master_ptr) cinfo->master; 27670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine const jpeg_scan_info * scanptr = cinfo->scan_info + master->scan_number; 27770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 27870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->comps_in_scan = scanptr->comps_in_scan; 27970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < scanptr->comps_in_scan; ci++) { 28070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->cur_comp_info[ci] = 28170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine &cinfo->comp_info[scanptr->component_index[ci]]; 28270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 28370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Ss = scanptr->Ss; 28470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Se = scanptr->Se; 28570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Ah = scanptr->Ah; 28670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Al = scanptr->Al; 28770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 28870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine else 28970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 29070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine { 29170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Prepare for single sequential-JPEG scan containing all components */ 29270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->num_components > MAX_COMPS_IN_SCAN) 29370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 29470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine MAX_COMPS_IN_SCAN); 29570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->comps_in_scan = cinfo->num_components; 29670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < cinfo->num_components; ci++) { 29770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->cur_comp_info[ci] = &cinfo->comp_info[ci]; 29870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 29970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Ss = 0; 30070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Se = DCTSIZE2-1; 30170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Ah = 0; 30270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->Al = 0; 30370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 30470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 30570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 30670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 30770a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 30870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineper_scan_setup (j_compress_ptr cinfo) 30970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Do computations that are needed before processing a JPEG scan */ 31070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* cinfo->comps_in_scan and cinfo->cur_comp_info[] are already set */ 31170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 31270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int ci, mcublks, tmp; 31370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 31470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 31570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->comps_in_scan == 1) { 31670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 31770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Noninterleaved (single-component) scan */ 31870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr = cinfo->cur_comp_info[0]; 31970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 32070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Overall image size in MCUs */ 32170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->MCUs_per_row = compptr->width_in_blocks; 32270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->MCU_rows_in_scan = compptr->height_in_blocks; 32370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 32470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For noninterleaved scan, always one block per MCU */ 32570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_width = 1; 32670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_height = 1; 32770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_blocks = 1; 32870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_sample_width = DCTSIZE; 32970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->last_col_width = 1; 33070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* For noninterleaved scans, it is convenient to define last_row_height 33170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * as the number of block rows present in the last iMCU row. 33270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 33370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 33470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (tmp == 0) tmp = compptr->v_samp_factor; 33570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->last_row_height = tmp; 33670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 33770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Prepare array describing MCU composition */ 33870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->blocks_in_MCU = 1; 33970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->MCU_membership[0] = 0; 34070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 34170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 34270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 34370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Interleaved (multi-component) scan */ 34470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) 34570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, 34670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine MAX_COMPS_IN_SCAN); 34770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 34870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Overall image size in MCUs */ 34970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->MCUs_per_row = (JDIMENSION) 35070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_width, 35170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) (cinfo->max_h_samp_factor*DCTSIZE)); 35270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->MCU_rows_in_scan = (JDIMENSION) 35370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jdiv_round_up((long) cinfo->image_height, 35470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) (cinfo->max_v_samp_factor*DCTSIZE)); 35570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 35670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->blocks_in_MCU = 0; 35770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 35870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 35970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr = cinfo->cur_comp_info[ci]; 36070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Sampling factors give # of blocks of component in each MCU */ 36170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_width = compptr->h_samp_factor; 36270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_height = compptr->v_samp_factor; 36370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height; 36470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->MCU_sample_width = compptr->MCU_width * DCTSIZE; 36570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Figure number of non-dummy blocks in last MCU column & row */ 36670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine tmp = (int) (compptr->width_in_blocks % compptr->MCU_width); 36770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (tmp == 0) tmp = compptr->MCU_width; 36870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->last_col_width = tmp; 36970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine tmp = (int) (compptr->height_in_blocks % compptr->MCU_height); 37070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (tmp == 0) tmp = compptr->MCU_height; 37170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr->last_row_height = tmp; 37270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Prepare array describing MCU composition */ 37370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine mcublks = compptr->MCU_blocks; 37470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->blocks_in_MCU + mcublks > C_MAX_BLOCKS_IN_MCU) 37570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_BAD_MCU_SIZE); 37670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine while (mcublks-- > 0) { 37770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci; 37870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 37970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 38070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 38170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 38270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 38370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Convert restart specified in rows to actual MCU count. */ 38470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Note that count must fit in 16 bits, so we provide limiting. */ 38570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->restart_in_rows > 0) { 38670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine long nominal = (long) cinfo->restart_in_rows * (long) cinfo->MCUs_per_row; 38770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->restart_interval = (unsigned int) MIN(nominal, 65535L); 38870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 38970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 39070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 39170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 39270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 39370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Per-pass setup. 39470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This is called at the beginning of each pass. We determine which modules 39570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * will be active during this pass and give them appropriate start_pass calls. 39670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * We also set is_last_pass to indicate whether any more passes will be 39770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * required. 39870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 39970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 40070a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 40170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineprepare_for_pass (j_compress_ptr cinfo) 40270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 40370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_master_ptr master = (my_master_ptr) cinfo->master; 40470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 40570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine switch (master->pass_type) { 40670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case main_pass: 40770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Initial pass: will collect input data, and do either Huffman 40870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * optimization or data output for the first scan. 40970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 41070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine select_scan_parameters(cinfo); 41170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine per_scan_setup(cinfo); 41270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! cinfo->raw_data_in) { 41370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->cconvert->start_pass) (cinfo); 41470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->downsample->start_pass) (cinfo); 41570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->prep->start_pass) (cinfo, JBUF_PASS_THRU); 41670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 41770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->fdct->start_pass) (cinfo); 41870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->entropy->start_pass) (cinfo, cinfo->optimize_coding); 41970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->coef->start_pass) (cinfo, 42070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (master->total_passes > 1 ? 42170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine JBUF_SAVE_AND_PASS : JBUF_PASS_THRU)); 42270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU); 42370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->optimize_coding) { 42470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* No immediate data output; postpone writing frame/scan headers */ 42570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.call_pass_startup = FALSE; 42670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 42770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Will write frame/scan headers at first jpeg_write_scanlines call */ 42870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.call_pass_startup = TRUE; 42970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 43070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 43170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef ENTROPY_OPT_SUPPORTED 43270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case huff_opt_pass: 43370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Do Huffman optimization for a scan after the first one. */ 43470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine select_scan_parameters(cinfo); 43570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine per_scan_setup(cinfo); 43670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->Ss != 0 || cinfo->Ah == 0 || cinfo->arith_code) { 43770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->entropy->start_pass) (cinfo, TRUE); 43870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST); 43970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.call_pass_startup = FALSE; 44070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 44170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 44270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Special case: Huffman DC refinement scans need no Huffman table 44370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * and therefore we can skip the optimization pass for them. 44470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 44570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = output_pass; 44670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_number++; 44770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /*FALLTHROUGH*/ 44870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 44970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case output_pass: 45070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Do a data-output pass. */ 45170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* We need not repeat per-scan setup if prior optimization pass did it. */ 45270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! cinfo->optimize_coding) { 45370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine select_scan_parameters(cinfo); 45470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine per_scan_setup(cinfo); 45570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 45670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->entropy->start_pass) (cinfo, FALSE); 45770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST); 45870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* We emit frame/scan headers now */ 45970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (master->scan_number == 0) 46070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->marker->write_frame_header) (cinfo); 46170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->marker->write_scan_header) (cinfo); 46270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.call_pass_startup = FALSE; 46370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 46470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine default: 46570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_NOT_COMPILED); 46670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 46770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 46870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.is_last_pass = (master->pass_number == master->total_passes-1); 46970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 47070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Set up progress monitor's pass info if present */ 47170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progress != NULL) { 47270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->progress->completed_passes = master->pass_number; 47370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->progress->total_passes = master->total_passes; 47470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 47570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 47670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 47770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 47870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 47970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Special start-of-pass hook. 48070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This is called by jpeg_write_scanlines if call_pass_startup is TRUE. 48170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * In single-pass processing, we need this hook because we don't want to 48270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * write frame/scan headers during jpeg_start_compress; we want to let the 48370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * application write COM markers etc. between jpeg_start_compress and the 48470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * jpeg_write_scanlines loop. 48570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * In multi-pass processing, this routine is not used. 48670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 48770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 48870a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 48970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinepass_startup (j_compress_ptr cinfo) 49070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 49170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->master->call_pass_startup = FALSE; /* reset flag so call only once */ 49270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 49370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->marker->write_frame_header) (cinfo); 49470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->marker->write_scan_header) (cinfo); 49570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 49670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 49770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 49870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 49970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Finish up at end of pass. 50070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 50170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 50270a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 50370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinefinish_pass_master (j_compress_ptr cinfo) 50470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 50570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_master_ptr master = (my_master_ptr) cinfo->master; 50670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 50770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* The entropy coder always needs an end-of-pass call, 50870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * either to analyze statistics or to flush its output buffer. 50970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 51070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->entropy->finish_pass) (cinfo); 51170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 51270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Update state for next pass */ 51370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine switch (master->pass_type) { 51470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case main_pass: 51570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* next pass is either output of scan 0 (after optimization) 51670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * or output of scan 1 (if no optimization). 51770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 51870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = output_pass; 51970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! cinfo->optimize_coding) 52070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->scan_number++; 52170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 52270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case huff_opt_pass: 52370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* next pass is always output of current scan */ 52470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = output_pass; 52570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 52670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case output_pass: 52770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* next pass is either optimization or output of next scan */ 52870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->optimize_coding) 52970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = huff_opt_pass; 53070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->scan_number++; 53170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 53270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 53370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 53470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_number++; 53570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 53670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 53770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 53870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 53970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Initialize master compression control. 54070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 54170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 54270a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineGLOBAL(void) 54370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinejinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only) 54470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 54570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_master_ptr master; 54670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 54770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master = (my_master_ptr) 54870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 54970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine SIZEOF(my_comp_master)); 55070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->master = (struct jpeg_comp_master *) master; 55170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.prepare_for_pass = prepare_for_pass; 55270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.pass_startup = pass_startup; 55370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.finish_pass = finish_pass_master; 55470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pub.is_last_pass = FALSE; 55570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 55670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Validate parameters, determine derived values */ 55770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine initial_setup(cinfo); 55870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 55970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->scan_info != NULL) { 56070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_MULTISCAN_FILES_SUPPORTED 56170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine validate_script(cinfo); 56270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#else 56370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_NOT_COMPILED); 56470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif 56570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 56670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->progressive_mode = FALSE; 56770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->num_scans = 1; 56870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 56970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 57070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progressive_mode) /* TEMPORARY HACK ??? */ 57170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->optimize_coding = TRUE; /* assume default tables no good for progressive mode */ 57270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 57370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Initialize my private state */ 57470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (transcode_only) { 57570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* no main pass in transcoding */ 57670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->optimize_coding) 57770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = huff_opt_pass; 57870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine else 57970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = output_pass; 58070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 58170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* for normal compression, first pass is always this type: */ 58270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_type = main_pass; 58370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 58470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->scan_number = 0; 58570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->pass_number = 0; 58670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->optimize_coding) 58770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->total_passes = cinfo->num_scans * 2; 58870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine else 58970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine master->total_passes = cinfo->num_scans; 59070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 591