1e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#if !defined(_FX_JPEG_TURBO_) 2e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* 3e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * jcmaster.c 4e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * 5e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Copyright (C) 1991-1997, Thomas G. Lane. 6e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * This file is part of the Independent JPEG Group's software. 7e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * For conditions of distribution and use, see the accompanying README file. 8e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * 9e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * This file contains master control logic for the JPEG compressor. 10e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * These routines are concerned with parameter validation, initial setup, 11e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * and inter-pass control (determining the number of passes and the work 12e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * to be done in each pass). 13e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 14e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 15e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#define JPEG_INTERNALS 16e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#include "jinclude.h" 17e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#include "jpeglib.h" 18e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 19e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 20e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* Private state */ 21e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 22e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovtypedef enum { 23e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov main_pass, /* input data, also do first output step */ 24e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov huff_opt_pass, /* Huffman code optimization pass */ 25e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov output_pass /* data output pass */ 26e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} c_pass_type; 27e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 28e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovtypedef struct { 29e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov struct jpeg_comp_master pub; /* public fields */ 30e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 31e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov c_pass_type pass_type; /* the type of the current pass */ 32e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 33e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int pass_number; /* # of passes completed */ 34e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int total_passes; /* total # of passes needed */ 35e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 36e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int scan_number; /* current index in scan_info[] */ 37e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} my_comp_master; 38e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 39e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovtypedef my_comp_master * my_master_ptr; 40e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 41e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 42e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* 43e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Support routines that do various essential calculations. 44e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 45e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 46e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovLOCAL(void) 47e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovinitial_setup (j_compress_ptr cinfo) 48e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* Do computations that are needed before master selection phase */ 49e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 50e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int ci; 51e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jpeg_component_info *compptr; 52e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov long samplesperrow; 53e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov JDIMENSION jd_samplesperrow; 54e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 55e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Sanity check on image dimensions */ 56e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->image_height <= 0 || cinfo->image_width <= 0 57e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov || cinfo->num_components <= 0 || cinfo->input_components <= 0) 58e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_EMPTY_IMAGE); 59e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 60e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Make sure image isn't bigger than I can handle */ 61e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION || 62e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION) 63e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION); 64e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 65e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Width of an input scanline must be representable as JDIMENSION. */ 66e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components; 67e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jd_samplesperrow = (JDIMENSION) samplesperrow; 68e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if ((long) jd_samplesperrow != samplesperrow) 69e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_WIDTH_OVERFLOW); 70e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 71e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For now, precision must match compiled-in value... */ 72e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->data_precision != BITS_IN_JSAMPLE) 73e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision); 74e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 75e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Check that number of components won't exceed internal array sizes */ 76e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->num_components > MAX_COMPONENTS) 77e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 78e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov MAX_COMPONENTS); 79e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 80e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Compute maximum sampling factors; check factor validity */ 81e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->max_h_samp_factor = 1; 82e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->max_v_samp_factor = 1; 83e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 84e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ci++, compptr++) { 85e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR || 86e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR) 87e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_BAD_SAMPLING); 88e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor, 89e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->h_samp_factor); 90e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, 91e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->v_samp_factor); 92e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 93e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 94e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Compute dimensions of components */ 95e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 96e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ci++, compptr++) { 97e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Fill in the correct component_index value; don't rely on application */ 98e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->component_index = ci; 99e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For compression, we never do DCT scaling. */ 100e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->DCT_scaled_size = DCTSIZE; 101e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Size in DCT blocks */ 102e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->width_in_blocks = (JDIMENSION) 103e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 104e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) (cinfo->max_h_samp_factor * DCTSIZE)); 105e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->height_in_blocks = (JDIMENSION) 106e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 107e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) (cinfo->max_v_samp_factor * DCTSIZE)); 108e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Size in samples */ 109e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->downsampled_width = (JDIMENSION) 110e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 111e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) cinfo->max_h_samp_factor); 112e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->downsampled_height = (JDIMENSION) 113e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 114e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) cinfo->max_v_samp_factor); 115e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Mark component needed (this flag isn't actually used for compression) */ 116e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->component_needed = TRUE; 117e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 118e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 119e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Compute number of fully interleaved MCU rows (number of times that 120e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * main controller will call coefficient controller). 121e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 122e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->total_iMCU_rows = (JDIMENSION) 123e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_height, 124e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) (cinfo->max_v_samp_factor*DCTSIZE)); 125e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 126e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 127e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 128e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_MULTISCAN_FILES_SUPPORTED 129e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 130e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovLOCAL(void) 131e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovvalidate_script (j_compress_ptr cinfo) 132e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* Verify that the scan script in cinfo->scan_info[] is valid; also 133e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * determine whether it uses progressive JPEG, and set cinfo->progressive_mode. 134e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 135e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 136e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov const jpeg_scan_info * scanptr; 137e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int scanno, ncomps, ci, coefi, thisi; 138e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int Ss, Se, Ah, Al; 139e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov boolean component_sent[MAX_COMPONENTS]; 140e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 141e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int * last_bitpos_ptr; 142e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int last_bitpos[MAX_COMPONENTS][DCTSIZE2]; 143e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* -1 until that coefficient has been seen; then last Al for it */ 144e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 145e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 146e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->num_scans <= 0) 147e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, 0); 148e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 149e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For sequential JPEG, all scans must have Ss=0, Se=DCTSIZE2-1; 150e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * for progressive JPEG, no scan can have this. 151e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 152e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov scanptr = cinfo->scan_info; 153e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (scanptr->Ss != 0 || scanptr->Se != DCTSIZE2-1) { 154e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 155e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->progressive_mode = TRUE; 156e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov last_bitpos_ptr = & last_bitpos[0][0]; 157e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) 158e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (coefi = 0; coefi < DCTSIZE2; coefi++) 159e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov *last_bitpos_ptr++ = -1; 160e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#else 161e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_NOT_COMPILED); 162e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 163e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 164e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->progressive_mode = FALSE; 165e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) 166e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov component_sent[ci] = FALSE; 167e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 168e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 169e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (scanno = 1; scanno <= cinfo->num_scans; scanptr++, scanno++) { 170e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Validate component indexes */ 171e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ncomps = scanptr->comps_in_scan; 172e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (ncomps <= 0 || ncomps > MAX_COMPS_IN_SCAN) 173e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, ncomps, MAX_COMPS_IN_SCAN); 174e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < ncomps; ci++) { 175e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov thisi = scanptr->component_index[ci]; 176e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (thisi < 0 || thisi >= cinfo->num_components) 177e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 178e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Components must appear in SOF order within each scan */ 179e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (ci > 0 && thisi <= scanptr->component_index[ci-1]) 180e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 181e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 182e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Validate progression parameters */ 183e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov Ss = scanptr->Ss; 184e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov Se = scanptr->Se; 185e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov Ah = scanptr->Ah; 186e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov Al = scanptr->Al; 187e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->progressive_mode) { 188e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 189e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* The JPEG spec simply gives the ranges 0..13 for Ah and Al, but that 190e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * seems wrong: the upper bound ought to depend on data precision. 191e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Perhaps they really meant 0..N+1 for N-bit precision. 192e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Here we allow 0..10 for 8-bit data; Al larger than 10 results in 193e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * out-of-range reconstructed DC values during the first DC scan, 194e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * which might cause problems for some decoders. 195e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 196e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#if BITS_IN_JSAMPLE == 8 197e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#define MAX_AH_AL 10 198e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#else 199e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#define MAX_AH_AL 13 200e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 201e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 || 202e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov Ah < 0 || Ah > MAX_AH_AL || Al < 0 || Al > MAX_AH_AL) 203e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 204e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Ss == 0) { 205e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Se != 0) /* DC and AC together not OK */ 206e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 207e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 208e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (ncomps != 1) /* AC scans must be for only one component */ 209e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 210e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 211e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < ncomps; ci++) { 212e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov last_bitpos_ptr = & last_bitpos[scanptr->component_index[ci]][0]; 213e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Ss != 0 && last_bitpos_ptr[0] < 0) /* AC without prior DC scan */ 214e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 215e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (coefi = Ss; coefi <= Se; coefi++) { 216e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (last_bitpos_ptr[coefi] < 0) { 217e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* first scan of this coefficient */ 218e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Ah != 0) 219e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 220e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 221e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* not first scan */ 222e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1) 223e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 224e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 225e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov last_bitpos_ptr[coefi] = Al; 226e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 227e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 228e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 229e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 230e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For sequential JPEG, all progression parameters must be these: */ 231e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0) 232e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno); 233e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Make sure components are not sent twice */ 234e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < ncomps; ci++) { 235e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov thisi = scanptr->component_index[ci]; 236e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (component_sent[thisi]) 237e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno); 238e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov component_sent[thisi] = TRUE; 239e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 240e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 241e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 242e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 243e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Now verify that everything got sent. */ 244e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->progressive_mode) { 245e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_PROGRESSIVE_SUPPORTED 246e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For progressive mode, we only check that at least some DC data 247e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * got sent for each component; the spec does not require that all bits 248e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * of all coefficients be transmitted. Would it be wiser to enforce 249e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * transmission of all coefficient bits?? 250e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 251e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) { 252e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (last_bitpos[ci][0] < 0) 253e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_MISSING_DATA); 254e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 255e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 256e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 257e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) { 258e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (! component_sent[ci]) 259e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_MISSING_DATA); 260e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 261e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 262e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 263e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 264e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif /* C_MULTISCAN_FILES_SUPPORTED */ 265e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 266e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 267e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovLOCAL(void) 268e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovselect_scan_parameters (j_compress_ptr cinfo) 269e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* Set up the scan parameters for the current scan */ 270e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 271e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int ci; 272e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 273e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_MULTISCAN_FILES_SUPPORTED 274e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->scan_info != NULL) { 275e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Prepare for current scan --- the script is already validated */ 276e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov my_master_ptr master = (my_master_ptr) cinfo->master; 277e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov const jpeg_scan_info * scanptr = cinfo->scan_info + master->scan_number; 278e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 279e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->comps_in_scan = scanptr->comps_in_scan; 280e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < scanptr->comps_in_scan; ci++) { 281e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->cur_comp_info[ci] = 282e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov &cinfo->comp_info[scanptr->component_index[ci]]; 283e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 284e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Ss = scanptr->Ss; 285e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Se = scanptr->Se; 286e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Ah = scanptr->Ah; 287e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Al = scanptr->Al; 288e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 289e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov else 290e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 291e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov { 292e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Prepare for single sequential-JPEG scan containing all components */ 293e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->num_components > MAX_COMPS_IN_SCAN) 294e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 295e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov MAX_COMPS_IN_SCAN); 296e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->comps_in_scan = cinfo->num_components; 297e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < cinfo->num_components; ci++) { 298e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->cur_comp_info[ci] = &cinfo->comp_info[ci]; 299e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 300e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Ss = 0; 301e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Se = DCTSIZE2-1; 302e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Ah = 0; 303e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->Al = 0; 304e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 305e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 306e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 307e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 308e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovLOCAL(void) 309e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovper_scan_setup (j_compress_ptr cinfo) 310e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* Do computations that are needed before processing a JPEG scan */ 311e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* cinfo->comps_in_scan and cinfo->cur_comp_info[] are already set */ 312e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 313e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov int ci, mcublks, tmp; 314e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jpeg_component_info *compptr; 315e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 316e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->comps_in_scan == 1) { 317e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 318e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Noninterleaved (single-component) scan */ 319e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr = cinfo->cur_comp_info[0]; 320e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 321e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Overall image size in MCUs */ 322e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->MCUs_per_row = compptr->width_in_blocks; 323e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->MCU_rows_in_scan = compptr->height_in_blocks; 324e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 325e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For noninterleaved scan, always one block per MCU */ 326e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_width = 1; 327e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_height = 1; 328e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_blocks = 1; 329e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_sample_width = DCTSIZE; 330e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->last_col_width = 1; 331e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* For noninterleaved scans, it is convenient to define last_row_height 332e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * as the number of block rows present in the last iMCU row. 333e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 334e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 335e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (tmp == 0) tmp = compptr->v_samp_factor; 336e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->last_row_height = tmp; 337e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 338e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Prepare array describing MCU composition */ 339e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->blocks_in_MCU = 1; 340e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->MCU_membership[0] = 0; 341e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 342e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 343e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 344e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Interleaved (multi-component) scan */ 345e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) 346e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, 347e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov MAX_COMPS_IN_SCAN); 348e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 349e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Overall image size in MCUs */ 350e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->MCUs_per_row = (JDIMENSION) 351e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_width, 352e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) (cinfo->max_h_samp_factor*DCTSIZE)); 353e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->MCU_rows_in_scan = (JDIMENSION) 354e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov jdiv_round_up((long) cinfo->image_height, 355e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (long) (cinfo->max_v_samp_factor*DCTSIZE)); 356e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 357e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->blocks_in_MCU = 0; 358e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 359e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 360e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr = cinfo->cur_comp_info[ci]; 361e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Sampling factors give # of blocks of component in each MCU */ 362e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_width = compptr->h_samp_factor; 363e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_height = compptr->v_samp_factor; 364e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height; 365e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->MCU_sample_width = compptr->MCU_width * DCTSIZE; 366e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Figure number of non-dummy blocks in last MCU column & row */ 367e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov tmp = (int) (compptr->width_in_blocks % compptr->MCU_width); 368e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (tmp == 0) tmp = compptr->MCU_width; 369e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->last_col_width = tmp; 370e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov tmp = (int) (compptr->height_in_blocks % compptr->MCU_height); 371e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (tmp == 0) tmp = compptr->MCU_height; 372e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov compptr->last_row_height = tmp; 373e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Prepare array describing MCU composition */ 374e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov mcublks = compptr->MCU_blocks; 375e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->blocks_in_MCU + mcublks > C_MAX_BLOCKS_IN_MCU) 376e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_BAD_MCU_SIZE); 377e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov while (mcublks-- > 0) { 378e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci; 379e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 380e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 381e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 382e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 383e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 384e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Convert restart specified in rows to actual MCU count. */ 385e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Note that count must fit in 16 bits, so we provide limiting. */ 386e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->restart_in_rows > 0) { 387e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov long nominal = (long) cinfo->restart_in_rows * (long) cinfo->MCUs_per_row; 388e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->restart_interval = (unsigned int) MIN(nominal, 65535L); 389e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 390e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 391e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 392e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 393e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* 394e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Per-pass setup. 395e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * This is called at the beginning of each pass. We determine which modules 396e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * will be active during this pass and give them appropriate start_pass calls. 397e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * We also set is_last_pass to indicate whether any more passes will be 398e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * required. 399e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 400e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 401e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovMETHODDEF(void) 402e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovprepare_for_pass (j_compress_ptr cinfo) 403e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 404e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov my_master_ptr master = (my_master_ptr) cinfo->master; 405e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 406e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov switch (master->pass_type) { 407e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov case main_pass: 408e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Initial pass: will collect input data, and do either Huffman 409e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * optimization or data output for the first scan. 410e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 411e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov select_scan_parameters(cinfo); 412e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov per_scan_setup(cinfo); 413e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (! cinfo->raw_data_in) { 414e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->cconvert->start_pass) (cinfo); 415e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->downsample->start_pass) (cinfo); 416e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->prep->start_pass) (cinfo, JBUF_PASS_THRU); 417e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 418e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->fdct->start_pass) (cinfo); 419e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->entropy->start_pass) (cinfo, cinfo->optimize_coding); 420e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->coef->start_pass) (cinfo, 421e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (master->total_passes > 1 ? 422e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov JBUF_SAVE_AND_PASS : JBUF_PASS_THRU)); 423e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU); 424e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->optimize_coding) { 425e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* No immediate data output; postpone writing frame/scan headers */ 426e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.call_pass_startup = FALSE; 427e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 428e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Will write frame/scan headers at first jpeg_write_scanlines call */ 429e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.call_pass_startup = TRUE; 430e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 431e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov break; 432e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef ENTROPY_OPT_SUPPORTED 433e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov case huff_opt_pass: 434e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Do Huffman optimization for a scan after the first one. */ 435e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov select_scan_parameters(cinfo); 436e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov per_scan_setup(cinfo); 437e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->Ss != 0 || cinfo->Ah == 0 || cinfo->arith_code) { 438e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->entropy->start_pass) (cinfo, TRUE); 439e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST); 440e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.call_pass_startup = FALSE; 441e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov break; 442e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 443e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Special case: Huffman DC refinement scans need no Huffman table 444e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * and therefore we can skip the optimization pass for them. 445e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 446e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = output_pass; 447e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_number++; 448e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /*FALLTHROUGH*/ 449e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 450e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov case output_pass: 451e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Do a data-output pass. */ 452e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* We need not repeat per-scan setup if prior optimization pass did it. */ 453e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (! cinfo->optimize_coding) { 454e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov select_scan_parameters(cinfo); 455e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov per_scan_setup(cinfo); 456e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 457e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->entropy->start_pass) (cinfo, FALSE); 458e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST); 459e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* We emit frame/scan headers now */ 460e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (master->scan_number == 0) 461e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->marker->write_frame_header) (cinfo); 462e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->marker->write_scan_header) (cinfo); 463e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.call_pass_startup = FALSE; 464e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov break; 465e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov default: 466e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_NOT_COMPILED); 467e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 468e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 469e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.is_last_pass = (master->pass_number == master->total_passes-1); 470e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 471e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Set up progress monitor's pass info if present */ 472e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->progress != NULL) { 473e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->progress->completed_passes = master->pass_number; 474e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->progress->total_passes = master->total_passes; 475e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 476e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 477e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 478e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 479e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* 480e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Special start-of-pass hook. 481e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * This is called by jpeg_write_scanlines if call_pass_startup is TRUE. 482e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * In single-pass processing, we need this hook because we don't want to 483e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * write frame/scan headers during jpeg_start_compress; we want to let the 484e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * application write COM markers etc. between jpeg_start_compress and the 485e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * jpeg_write_scanlines loop. 486e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * In multi-pass processing, this routine is not used. 487e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 488e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 489e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovMETHODDEF(void) 490e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovpass_startup (j_compress_ptr cinfo) 491e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 492e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->master->call_pass_startup = FALSE; /* reset flag so call only once */ 493e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 494e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->marker->write_frame_header) (cinfo); 495e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->marker->write_scan_header) (cinfo); 496e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 497e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 498e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 499e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* 500e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Finish up at end of pass. 501e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 502e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 503e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovMETHODDEF(void) 504e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovfinish_pass_master (j_compress_ptr cinfo) 505e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 506e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov my_master_ptr master = (my_master_ptr) cinfo->master; 507e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 508e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* The entropy coder always needs an end-of-pass call, 509e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * either to analyze statistics or to flush its output buffer. 510e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 511e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->entropy->finish_pass) (cinfo); 512e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 513e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Update state for next pass */ 514e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov switch (master->pass_type) { 515e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov case main_pass: 516e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* next pass is either output of scan 0 (after optimization) 517e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * or output of scan 1 (if no optimization). 518e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 519e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = output_pass; 520e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (! cinfo->optimize_coding) 521e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->scan_number++; 522e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov break; 523e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov case huff_opt_pass: 524e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* next pass is always output of current scan */ 525e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = output_pass; 526e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov break; 527e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov case output_pass: 528e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* next pass is either optimization or output of next scan */ 529e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->optimize_coding) 530e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = huff_opt_pass; 531e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->scan_number++; 532e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov break; 533e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 534e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 535e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_number++; 536e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 537e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 538e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 539e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* 540e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov * Initialize master compression control. 541e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov */ 542e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 543e6986e1e8d4a57987f47c215490cb080a65ee29aSvet GanovGLOBAL(void) 544e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganovjinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only) 545e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov{ 546e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov my_master_ptr master; 547e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 548e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master = (my_master_ptr) 549e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 550e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov SIZEOF(my_comp_master)); 551e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->master = (struct jpeg_comp_master *) master; 552e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.prepare_for_pass = prepare_for_pass; 553e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.pass_startup = pass_startup; 554e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.finish_pass = finish_pass_master; 555e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pub.is_last_pass = FALSE; 556e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 557e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Validate parameters, determine derived values */ 558e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov initial_setup(cinfo); 559e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 560e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->scan_info != NULL) { 561e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#ifdef C_MULTISCAN_FILES_SUPPORTED 562e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov validate_script(cinfo); 563e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#else 564e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov ERREXIT(cinfo, JERR_NOT_COMPILED); 565e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif 566e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 567e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->progressive_mode = FALSE; 568e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->num_scans = 1; 569e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 570e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 571e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->progressive_mode) /* TEMPORARY HACK ??? */ 572e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov cinfo->optimize_coding = TRUE; /* assume default tables no good for progressive mode */ 573e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 574e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* Initialize my private state */ 575e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (transcode_only) { 576e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* no main pass in transcoding */ 577e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->optimize_coding) 578e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = huff_opt_pass; 579e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov else 580e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = output_pass; 581e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } else { 582e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* for normal compression, first pass is always this type: */ 583e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_type = main_pass; 584e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov } 585e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->scan_number = 0; 586e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->pass_number = 0; 587e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov if (cinfo->optimize_coding) 588e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->total_passes = cinfo->num_scans * 2; 589e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov else 590e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov master->total_passes = cinfo->num_scans; 591e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov} 592e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov 593e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#endif //_FX_JPEG_TURBO_ 594