1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if !defined(_FX_JPEG_TURBO_) 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * jcmaster.c 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Copyright (C) 1991-1997, Thomas G. Lane. 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file is part of the Independent JPEG Group's software. 7ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * For conditions of distribution and use, see the accompanying README file. 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file contains master control logic for the JPEG compressor. 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * These routines are concerned with parameter validation, initial setup, 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * and inter-pass control (determining the number of passes and the work 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * to be done in each pass). 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JPEG_INTERNALS 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "jinclude.h" 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "jpeglib.h" 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Private state */ 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef enum { 23ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov main_pass, /* input data, also do first output step */ 24ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov huff_opt_pass, /* Huffman code optimization pass */ 25ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov output_pass /* data output pass */ 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} c_pass_type; 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 28ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef struct { 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov struct jpeg_comp_master pub; /* public fields */ 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov c_pass_type pass_type; /* the type of the current pass */ 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int pass_number; /* # of passes completed */ 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int total_passes; /* total # of passes needed */ 35ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int scan_number; /* current index in scan_info[] */ 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} my_comp_master; 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef my_comp_master * my_master_ptr; 40ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Support routines that do various essential calculations. 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovinitial_setup (j_compress_ptr cinfo) 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Do computations that are needed before master selection phase */ 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int ci; 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_component_info *compptr; 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov long samplesperrow; 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION jd_samplesperrow; 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Sanity check on image dimensions */ 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->image_height <= 0 || cinfo->image_width <= 0 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov || cinfo->num_components <= 0 || cinfo->input_components <= 0) 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_EMPTY_IMAGE); 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Make sure image isn't bigger than I can handle */ 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION || 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION) 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION); 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Width of an input scanline must be representable as JDIMENSION. */ 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components; 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jd_samplesperrow = (JDIMENSION) samplesperrow; 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if ((long) jd_samplesperrow != samplesperrow) 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_WIDTH_OVERFLOW); 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For now, precision must match compiled-in value... */ 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->data_precision != BITS_IN_JSAMPLE) 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision); 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Check that number of components won't exceed internal array sizes */ 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->num_components > MAX_COMPONENTS) 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAX_COMPONENTS); 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Compute maximum sampling factors; check factor validity */ 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->max_h_samp_factor = 1; 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->max_v_samp_factor = 1; 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ci++, compptr++) { 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR || 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR) 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_SAMPLING); 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor, 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->h_samp_factor); 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->v_samp_factor); 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Compute dimensions of components */ 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ci++, compptr++) { 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Fill in the correct component_index value; don't rely on application */ 98ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->component_index = ci; 99ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For compression, we never do DCT scaling. */ 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->DCT_scaled_size = DCTSIZE; 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Size in DCT blocks */ 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->width_in_blocks = (JDIMENSION) 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) (cinfo->max_h_samp_factor * DCTSIZE)); 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->height_in_blocks = (JDIMENSION) 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) (cinfo->max_v_samp_factor * DCTSIZE)); 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Size in samples */ 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->downsampled_width = (JDIMENSION) 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) cinfo->max_h_samp_factor); 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->downsampled_height = (JDIMENSION) 113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) cinfo->max_v_samp_factor); 115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Mark component needed (this flag isn't actually used for compression) */ 116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->component_needed = TRUE; 117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Compute number of fully interleaved MCU rows (number of times that 120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * main controller will call coefficient controller). 121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->total_iMCU_rows = (JDIMENSION) 123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_height, 124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) (cinfo->max_v_samp_factor*DCTSIZE)); 125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_MULTISCAN_FILES_SUPPORTED 129ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 130ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovvalidate_script (j_compress_ptr cinfo) 132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Verify that the scan script in cinfo->scan_info[] is valid; also 133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * determine whether it uses progressive JPEG, and set cinfo->progressive_mode. 134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const jpeg_scan_info * scanptr; 137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int scanno, ncomps, ci, coefi, thisi; 138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int Ss, Se, Ah, Al; 139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov boolean component_sent[MAX_COMPONENTS]; 140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int * last_bitpos_ptr; 142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int last_bitpos[MAX_COMPONENTS][DCTSIZE2]; 143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* -1 until that coefficient has been seen; then last Al for it */ 144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 146ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->num_scans <= 0) 147ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, 0); 148ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 149ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For sequential JPEG, all scans must have Ss=0, Se=DCTSIZE2-1; 150ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * for progressive JPEG, no scan can have this. 151ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 152ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov scanptr = cinfo->scan_info; 153ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (scanptr->Ss != 0 || scanptr->Se != DCTSIZE2-1) { 154ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 155ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->progressive_mode = TRUE; 156ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov last_bitpos_ptr = & last_bitpos[0][0]; 157ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) 158ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (coefi = 0; coefi < DCTSIZE2; coefi++) 159ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov *last_bitpos_ptr++ = -1; 160ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 161ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_NOT_COMPILED); 162ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 163ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 164ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->progressive_mode = FALSE; 165ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) 166ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov component_sent[ci] = FALSE; 167ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 168ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 169ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (scanno = 1; scanno <= cinfo->num_scans; scanptr++, scanno++) { 170ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Validate component indexes */ 171ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ncomps = scanptr->comps_in_scan; 172ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (ncomps <= 0 || ncomps > MAX_COMPS_IN_SCAN) 173ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, ncomps, MAX_COMPS_IN_SCAN); 174ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < ncomps; ci++) { 175ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov thisi = scanptr->component_index[ci]; 176ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (thisi < 0 || thisi >= cinfo->num_components) 177ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 178ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Components must appear in SOF order within each scan */ 179ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (ci > 0 && thisi <= scanptr->component_index[ci-1]) 180ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 181ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 182ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Validate progression parameters */ 183ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov Ss = scanptr->Ss; 184ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov Se = scanptr->Se; 185ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov Ah = scanptr->Ah; 186ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov Al = scanptr->Al; 187ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->progressive_mode) { 188ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 189ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The JPEG spec simply gives the ranges 0..13 for Ah and Al, but that 190ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * seems wrong: the upper bound ought to depend on data precision. 191ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Perhaps they really meant 0..N+1 for N-bit precision. 192ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Here we allow 0..10 for 8-bit data; Al larger than 10 results in 193ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * out-of-range reconstructed DC values during the first DC scan, 194ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * which might cause problems for some decoders. 195ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 196ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if BITS_IN_JSAMPLE == 8 197ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MAX_AH_AL 10 198ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 199ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MAX_AH_AL 13 200ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 201ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 || 202ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov Ah < 0 || Ah > MAX_AH_AL || Al < 0 || Al > MAX_AH_AL) 203ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 204ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Ss == 0) { 205ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Se != 0) /* DC and AC together not OK */ 206ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 207ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 208ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (ncomps != 1) /* AC scans must be for only one component */ 209ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 210ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 211ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < ncomps; ci++) { 212ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov last_bitpos_ptr = & last_bitpos[scanptr->component_index[ci]][0]; 213ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Ss != 0 && last_bitpos_ptr[0] < 0) /* AC without prior DC scan */ 214ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 215ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (coefi = Ss; coefi <= Se; coefi++) { 216ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (last_bitpos_ptr[coefi] < 0) { 217ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* first scan of this coefficient */ 218ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Ah != 0) 219ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 220ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 221ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* not first scan */ 222ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1) 223ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 224ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 225ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov last_bitpos_ptr[coefi] = Al; 226ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 227ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 228ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 229ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 230ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For sequential JPEG, all progression parameters must be these: */ 231ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0) 232ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 233ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Make sure components are not sent twice */ 234ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < ncomps; ci++) { 235ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov thisi = scanptr->component_index[ci]; 236ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (component_sent[thisi]) 237ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 238ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov component_sent[thisi] = TRUE; 239ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 240ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 241ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 242ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 243ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Now verify that everything got sent. */ 244ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->progressive_mode) { 245ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 246ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For progressive mode, we only check that at least some DC data 247ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * got sent for each component; the spec does not require that all bits 248ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * of all coefficients be transmitted. Would it be wiser to enforce 249ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * transmission of all coefficient bits?? 250ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 251ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) { 252ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (last_bitpos[ci][0] < 0) 253ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_MISSING_DATA); 254ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 255ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 256ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 257ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) { 258ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! component_sent[ci]) 259ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_MISSING_DATA); 260ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 261ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 262ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 263ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 264ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* C_MULTISCAN_FILES_SUPPORTED */ 265ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 266ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 267ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 268ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovselect_scan_parameters (j_compress_ptr cinfo) 269ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Set up the scan parameters for the current scan */ 270ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 271ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int ci; 272ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 273ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_MULTISCAN_FILES_SUPPORTED 274ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->scan_info != NULL) { 275ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Prepare for current scan --- the script is already validated */ 276ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_master_ptr master = (my_master_ptr) cinfo->master; 277ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const jpeg_scan_info * scanptr = cinfo->scan_info + master->scan_number; 278ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 279ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->comps_in_scan = scanptr->comps_in_scan; 280ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < scanptr->comps_in_scan; ci++) { 281ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->cur_comp_info[ci] = 282ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov &cinfo->comp_info[scanptr->component_index[ci]]; 283ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 284ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ss = scanptr->Ss; 285ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Se = scanptr->Se; 286ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ah = scanptr->Ah; 287ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Al = scanptr->Al; 288ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 289ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 290ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 291ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 292ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Prepare for single sequential-JPEG scan containing all components */ 293ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->num_components > MAX_COMPS_IN_SCAN) 294ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 295ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAX_COMPS_IN_SCAN); 296ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->comps_in_scan = cinfo->num_components; 297ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) { 298ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->cur_comp_info[ci] = &cinfo->comp_info[ci]; 299ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 300ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ss = 0; 301ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Se = DCTSIZE2-1; 302ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ah = 0; 303ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Al = 0; 304ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 305ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 306ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 307ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 308ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 309ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovper_scan_setup (j_compress_ptr cinfo) 310ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Do computations that are needed before processing a JPEG scan */ 311ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* cinfo->comps_in_scan and cinfo->cur_comp_info[] are already set */ 312ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 313ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int ci, mcublks, tmp; 314ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_component_info *compptr; 315ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 316ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->comps_in_scan == 1) { 317ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 318ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Noninterleaved (single-component) scan */ 319ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr = cinfo->cur_comp_info[0]; 320ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 321ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Overall image size in MCUs */ 322ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->MCUs_per_row = compptr->width_in_blocks; 323ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->MCU_rows_in_scan = compptr->height_in_blocks; 324ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 325ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For noninterleaved scan, always one block per MCU */ 326ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_width = 1; 327ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_height = 1; 328ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_blocks = 1; 329ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_sample_width = DCTSIZE; 330ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->last_col_width = 1; 331ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For noninterleaved scans, it is convenient to define last_row_height 332ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * as the number of block rows present in the last iMCU row. 333ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 334ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 335ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (tmp == 0) tmp = compptr->v_samp_factor; 336ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->last_row_height = tmp; 337ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 338ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Prepare array describing MCU composition */ 339ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->blocks_in_MCU = 1; 340ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->MCU_membership[0] = 0; 341ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 342ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 343ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 344ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Interleaved (multi-component) scan */ 345ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) 346ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, 347ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAX_COMPS_IN_SCAN); 348ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 349ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Overall image size in MCUs */ 350ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->MCUs_per_row = (JDIMENSION) 351ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_width, 352ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) (cinfo->max_h_samp_factor*DCTSIZE)); 353ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->MCU_rows_in_scan = (JDIMENSION) 354ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jdiv_round_up((long) cinfo->image_height, 355ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (long) (cinfo->max_v_samp_factor*DCTSIZE)); 356ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 357ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->blocks_in_MCU = 0; 358ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 359ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 360ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr = cinfo->cur_comp_info[ci]; 361ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Sampling factors give # of blocks of component in each MCU */ 362ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_width = compptr->h_samp_factor; 363ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_height = compptr->v_samp_factor; 364ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height; 365ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->MCU_sample_width = compptr->MCU_width * DCTSIZE; 366ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Figure number of non-dummy blocks in last MCU column & row */ 367ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tmp = (int) (compptr->width_in_blocks % compptr->MCU_width); 368ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (tmp == 0) tmp = compptr->MCU_width; 369ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->last_col_width = tmp; 370ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tmp = (int) (compptr->height_in_blocks % compptr->MCU_height); 371ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (tmp == 0) tmp = compptr->MCU_height; 372ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->last_row_height = tmp; 373ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Prepare array describing MCU composition */ 374ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov mcublks = compptr->MCU_blocks; 375ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->blocks_in_MCU + mcublks > C_MAX_BLOCKS_IN_MCU) 376ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_MCU_SIZE); 377ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (mcublks-- > 0) { 378ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci; 379ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 380ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 381ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 382ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 383ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 384ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Convert restart specified in rows to actual MCU count. */ 385ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Note that count must fit in 16 bits, so we provide limiting. */ 386ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->restart_in_rows > 0) { 387ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov long nominal = (long) cinfo->restart_in_rows * (long) cinfo->MCUs_per_row; 388ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->restart_interval = (unsigned int) MIN(nominal, 65535L); 389ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 390ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 391ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 392ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 393ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 394ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Per-pass setup. 395ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This is called at the beginning of each pass. We determine which modules 396ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * will be active during this pass and give them appropriate start_pass calls. 397ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We also set is_last_pass to indicate whether any more passes will be 398ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * required. 399ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 400ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 401ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 402ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovprepare_for_pass (j_compress_ptr cinfo) 403ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 404ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_master_ptr master = (my_master_ptr) cinfo->master; 405ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 406ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (master->pass_type) { 407ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case main_pass: 408ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Initial pass: will collect input data, and do either Huffman 409ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * optimization or data output for the first scan. 410ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 411ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov select_scan_parameters(cinfo); 412ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov per_scan_setup(cinfo); 413ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! cinfo->raw_data_in) { 414ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->cconvert->start_pass) (cinfo); 415ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->downsample->start_pass) (cinfo); 416ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->prep->start_pass) (cinfo, JBUF_PASS_THRU); 417ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 418ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->fdct->start_pass) (cinfo); 419ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->entropy->start_pass) (cinfo, cinfo->optimize_coding); 420ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->coef->start_pass) (cinfo, 421ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (master->total_passes > 1 ? 422ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JBUF_SAVE_AND_PASS : JBUF_PASS_THRU)); 423ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU); 424ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->optimize_coding) { 425ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* No immediate data output; postpone writing frame/scan headers */ 426ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.call_pass_startup = FALSE; 427ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 428ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Will write frame/scan headers at first jpeg_write_scanlines call */ 429ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.call_pass_startup = TRUE; 430ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 431ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 432ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef ENTROPY_OPT_SUPPORTED 433ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case huff_opt_pass: 434ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Do Huffman optimization for a scan after the first one. */ 435ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov select_scan_parameters(cinfo); 436ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov per_scan_setup(cinfo); 437ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->Ss != 0 || cinfo->Ah == 0 || cinfo->arith_code) { 438ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->entropy->start_pass) (cinfo, TRUE); 439ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST); 440ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.call_pass_startup = FALSE; 441ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 442ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 443ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Special case: Huffman DC refinement scans need no Huffman table 444ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * and therefore we can skip the optimization pass for them. 445ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 446ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = output_pass; 447ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_number++; 448ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*FALLTHROUGH*/ 449ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 450ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case output_pass: 451ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Do a data-output pass. */ 452ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We need not repeat per-scan setup if prior optimization pass did it. */ 453ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! cinfo->optimize_coding) { 454ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov select_scan_parameters(cinfo); 455ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov per_scan_setup(cinfo); 456ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 457ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->entropy->start_pass) (cinfo, FALSE); 458ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST); 459ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We emit frame/scan headers now */ 460ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (master->scan_number == 0) 461ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->marker->write_frame_header) (cinfo); 462ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->marker->write_scan_header) (cinfo); 463ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.call_pass_startup = FALSE; 464ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 465ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov default: 466ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_NOT_COMPILED); 467ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 468ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 469ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.is_last_pass = (master->pass_number == master->total_passes-1); 470ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 471ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Set up progress monitor's pass info if present */ 472ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->progress != NULL) { 473ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->progress->completed_passes = master->pass_number; 474ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->progress->total_passes = master->total_passes; 475ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 476ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 477ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 478ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 479ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 480ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Special start-of-pass hook. 481ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This is called by jpeg_write_scanlines if call_pass_startup is TRUE. 482ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * In single-pass processing, we need this hook because we don't want to 483ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * write frame/scan headers during jpeg_start_compress; we want to let the 484ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * application write COM markers etc. between jpeg_start_compress and the 485ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * jpeg_write_scanlines loop. 486ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * In multi-pass processing, this routine is not used. 487ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 488ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 489ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 490ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovpass_startup (j_compress_ptr cinfo) 491ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 492ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->master->call_pass_startup = FALSE; /* reset flag so call only once */ 493ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 494ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->marker->write_frame_header) (cinfo); 495ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->marker->write_scan_header) (cinfo); 496ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 497ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 498ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 499ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 500ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Finish up at end of pass. 501ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 502ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 503ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 504ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovfinish_pass_master (j_compress_ptr cinfo) 505ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 506ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_master_ptr master = (my_master_ptr) cinfo->master; 507ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 508ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The entropy coder always needs an end-of-pass call, 509ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * either to analyze statistics or to flush its output buffer. 510ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 511ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->entropy->finish_pass) (cinfo); 512ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 513ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Update state for next pass */ 514ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (master->pass_type) { 515ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case main_pass: 516ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* next pass is either output of scan 0 (after optimization) 517ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * or output of scan 1 (if no optimization). 518ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 519ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = output_pass; 520ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! cinfo->optimize_coding) 521ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->scan_number++; 522ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 523ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case huff_opt_pass: 524ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* next pass is always output of current scan */ 525ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = output_pass; 526ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 527ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case output_pass: 528ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* next pass is either optimization or output of next scan */ 529ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->optimize_coding) 530ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = huff_opt_pass; 531ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->scan_number++; 532ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 533ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 534ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 535ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_number++; 536ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 537ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 538ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 539ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 540ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Initialize master compression control. 541ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 542ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 543ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovGLOBAL(void) 544ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovjinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only) 545ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 546ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_master_ptr master; 547ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 548ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master = (my_master_ptr) 549ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 550ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SIZEOF(my_comp_master)); 551ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->master = (struct jpeg_comp_master *) master; 552ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.prepare_for_pass = prepare_for_pass; 553ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.pass_startup = pass_startup; 554ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.finish_pass = finish_pass_master; 555ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pub.is_last_pass = FALSE; 556ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 557ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Validate parameters, determine derived values */ 558ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov initial_setup(cinfo); 559ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 560ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->scan_info != NULL) { 561ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef C_MULTISCAN_FILES_SUPPORTED 562ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov validate_script(cinfo); 563ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else 564ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_NOT_COMPILED); 565ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 566ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 567ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->progressive_mode = FALSE; 568ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->num_scans = 1; 569ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 570ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 571ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->progressive_mode) /* TEMPORARY HACK ??? */ 572ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->optimize_coding = TRUE; /* assume default tables no good for progressive mode */ 573ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 574ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Initialize my private state */ 575ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (transcode_only) { 576ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* no main pass in transcoding */ 577ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->optimize_coding) 578ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = huff_opt_pass; 579ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 580ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = output_pass; 581ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 582ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* for normal compression, first pass is always this type: */ 583ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_type = main_pass; 584ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 585ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->scan_number = 0; 586ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->pass_number = 0; 587ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->optimize_coding) 588ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->total_passes = cinfo->num_scans * 2; 589ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 590ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov master->total_passes = cinfo->num_scans; 591ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 592ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 593ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif //_FX_JPEG_TURBO_ 594