19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jdinput.c 39f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 49f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Copyright (C) 1991-1997, Thomas G. Lane. 59f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This file is part of the Independent JPEG Group's software. 69f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * For conditions of distribution and use, see the accompanying README file. 79f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 89f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This file contains input control logic for the JPEG decompressor. 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * These routines are concerned with controlling the decompressor's input 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * processing (marker reading and coefficient decoding). The actual input 119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * reading is done in jdmarker.c, jdhuff.c, and jdphuff.c. 129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define JPEG_INTERNALS 159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jinclude.h" 169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jpeglib.h" 179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Private state */ 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef struct { 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project struct jpeg_input_controller pub; /* public fields */ 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project boolean inheaders; /* TRUE until first SOS is reached */ 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} my_input_controller; 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef my_input_controller * my_inputctl_ptr; 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Forward declarations */ 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) consume_markers JPP((j_decompress_ptr cinfo)); 323147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph WenMETHODDEF(int) consume_markers_with_huffman_index JPP((j_decompress_ptr cinfo, 33f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_index *index, int current_scan)); 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Routines to calculate various quantities related to the size of the image. 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectinitial_setup (j_decompress_ptr cinfo) 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Called once, when first SOS marker is reached */ 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci; 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Make sure image isn't bigger than I can handle */ 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION || 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION) 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION); 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* For now, precision must match compiled-in value... */ 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->data_precision != BITS_IN_JSAMPLE) 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision); 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Check that number of components won't exceed internal array sizes */ 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->num_components > MAX_COMPONENTS) 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAX_COMPONENTS); 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Compute maximum sampling factors; check factor validity */ 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->max_h_samp_factor = 1; 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->max_v_samp_factor = 1; 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR || 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR) 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_SAMPLING); 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor, 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->h_samp_factor); 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->v_samp_factor); 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We initialize DCT_scaled_size and min_DCT_scaled_size to DCTSIZE. 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In the full decompressor, this will be overridden by jdmaster.c; 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but in the transcoder, jdmaster.c is not used, so we must do it here. 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->min_DCT_scaled_size = DCTSIZE; 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Compute dimensions of components */ 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->DCT_scaled_size = DCTSIZE; 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Size in DCT blocks */ 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->width_in_blocks = (JDIMENSION) 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) (cinfo->max_h_samp_factor * DCTSIZE)); 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->height_in_blocks = (JDIMENSION) 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) (cinfo->max_v_samp_factor * DCTSIZE)); 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* downsampled_width and downsampled_height will also be overridden by 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jdmaster.c if we are doing full decompression. The transcoder library 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * doesn't use these values, but the calling application might. 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Size in samples */ 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->downsampled_width = (JDIMENSION) 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) cinfo->max_h_samp_factor); 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->downsampled_height = (JDIMENSION) 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) cinfo->max_v_samp_factor); 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Mark component needed, until color conversion says otherwise */ 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->component_needed = TRUE; 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Mark no quantization table yet saved for component */ 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->quant_table = NULL; 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Compute number of fully interleaved MCU rows. */ 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->total_iMCU_rows = (JDIMENSION) 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_height, 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) (cinfo->max_v_samp_factor*DCTSIZE)); 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Decide whether file contains multiple scans */ 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comps_in_scan < cinfo->num_components || cinfo->progressive_mode) 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->inputctl->has_multiple_scans = TRUE; 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->inputctl->has_multiple_scans = FALSE; 119f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->original_image_width = cinfo->image_width; 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectper_scan_setup (j_decompress_ptr cinfo) 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Do computations that are needed before processing a JPEG scan */ 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* cinfo->comps_in_scan and cinfo->cur_comp_info[] were set from SOS marker */ 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci, mcublks, tmp; 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comps_in_scan == 1) { 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Noninterleaved (single-component) scan */ 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[0]; 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Overall image size in MCUs */ 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->MCUs_per_row = compptr->width_in_blocks; 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->MCU_rows_in_scan = compptr->height_in_blocks; 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* For noninterleaved scan, always one block per MCU */ 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_width = 1; 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_height = 1; 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_blocks = 1; 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_sample_width = compptr->DCT_scaled_size; 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->last_col_width = 1; 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* For noninterleaved scans, it is convenient to define last_row_height 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * as the number of block rows present in the last iMCU row. 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (tmp == 0) tmp = compptr->v_samp_factor; 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->last_row_height = tmp; 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Prepare array describing MCU composition */ 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->blocks_in_MCU = 1; 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->MCU_membership[0] = 0; 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Interleaved (multi-component) scan */ 1599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) 1609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, 1619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAX_COMPS_IN_SCAN); 1629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Overall image size in MCUs */ 1649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->MCUs_per_row = (JDIMENSION) 1659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_width, 1669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) (cinfo->max_h_samp_factor*DCTSIZE)); 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->MCU_rows_in_scan = (JDIMENSION) 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jdiv_round_up((long) cinfo->image_height, 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) (cinfo->max_v_samp_factor*DCTSIZE)); 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->blocks_in_MCU = 0; 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 1749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 1759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Sampling factors give # of blocks of component in each MCU */ 1769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_width = compptr->h_samp_factor; 1779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_height = compptr->v_samp_factor; 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height; 1799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_sample_width = compptr->MCU_width * compptr->DCT_scaled_size; 1809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Figure number of non-dummy blocks in last MCU column & row */ 1819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project tmp = (int) (compptr->width_in_blocks % compptr->MCU_width); 1829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (tmp == 0) tmp = compptr->MCU_width; 1839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->last_col_width = tmp; 184f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#ifdef ANDROID_TILE_BASED_DECODE 185f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->tile_decode) { 186f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen tmp = (int) (jdiv_round_up(cinfo->image_width, 8) 187f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen % compptr->MCU_width); 188f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (tmp == 0) tmp = compptr->MCU_width; 189f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen compptr->last_col_width = tmp; 190f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 191f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#endif 192f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project tmp = (int) (compptr->height_in_blocks % compptr->MCU_height); 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (tmp == 0) tmp = compptr->MCU_height; 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->last_row_height = tmp; 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Prepare array describing MCU composition */ 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project mcublks = compptr->MCU_blocks; 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->blocks_in_MCU + mcublks > D_MAX_BLOCKS_IN_MCU) 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_MCU_SIZE); 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (mcublks-- > 0) { 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci; 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2083147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph WenGLOBAL(void) 2093147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wenjpeg_decompress_per_scan_setup(j_decompress_ptr cinfo) 2103147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen{ 2113147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen per_scan_setup(cinfo); 2123147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen} 2133147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 2143147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Save away a copy of the Q-table referenced by each component present 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * in the current scan, unless already saved during a prior scan. 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In a multiple-scan JPEG file, the encoder could assign different components 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the same Q-table slot number, but change table definitions between scans 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * so that each component uses a different Q-table. (The IJG encoder is not 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * currently capable of doing this, but other encoders might.) Since we want 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * to be able to dequantize all the components at the end of the file, this 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * means that we have to save away the table actually used for each component. 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We do this by copying the table at the start of the first scan containing 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the component. 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The JPEG spec prohibits the encoder from changing the contents of a Q-table 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * slot between scans of a component using that slot. If the encoder does so 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * anyway, this decoder will simply use the Q-table values that were current 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * at the start of the first scan for the component. 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The decompressor output side looks only at the saved quant tables, 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * not at the current Q-table slots. 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectlatch_quant_tables (j_decompress_ptr cinfo) 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci, qtblno; 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JQUANT_TBL * qtbl; 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* No work if we already saved Q-table for this component */ 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (compptr->quant_table != NULL) 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project continue; 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Make sure specified quantization table is present */ 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtblno = compptr->quant_tbl_no; 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS || 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->quant_tbl_ptrs[qtblno] == NULL) 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno); 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* OK, save away the quantization table */ 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtbl = (JQUANT_TBL *) 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(JQUANT_TBL)); 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MEMCOPY(qtbl, cinfo->quant_tbl_ptrs[qtblno], SIZEOF(JQUANT_TBL)); 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->quant_table = qtbl; 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize the input modules to read a scan of compressed data. 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The first call to this is done by jdmaster.c after initializing 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the entire decompressor (during jpeg_start_decompress). 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Subsequent calls come from consume_markers, below. 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_input_pass (j_decompress_ptr cinfo) 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project per_scan_setup(cinfo); 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project latch_quant_tables(cinfo); 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->entropy->start_pass) (cinfo); 2779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->coef->start_input_pass) (cinfo); 2789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->inputctl->consume_input = cinfo->coef->consume_data; 279f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->inputctl->consume_input_build_huffman_index = 280f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->coef->consume_data_build_huffman_index; 2819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Finish up after inputting a compressed-data scan. 2869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This is called by the coefficient controller after it's read all 2879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the expected data of the scan. 2889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 2919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectfinish_input_pass (j_decompress_ptr cinfo) 2929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->inputctl->consume_input = consume_markers; 294f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->inputctl->consume_input_build_huffman_index = 295f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen consume_markers_with_huffman_index; 2969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2993147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph WenMETHODDEF(int) 300f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wenconsume_markers_with_huffman_index (j_decompress_ptr cinfo, 301f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_index *index, int current_scan) 3023147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen{ 3033147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen return consume_markers(cinfo); 3043147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen} 3059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 3069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Read JPEG markers before, between, or after compressed-data scans. 3079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Change state as necessary when a new scan is reached. 3089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Return value is JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI. 3099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 3109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The consume_input method pointer points either here or to the 3119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * coefficient controller's consume_data routine, depending on whether 3129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * we are reading a compressed data segment or inter-segment markers. 3139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 3169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectconsume_markers (j_decompress_ptr cinfo) 3179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl; 3199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int val; 3209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (inputctl->pub.eoi_reached) /* After hitting EOI, read no further */ 3229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_REACHED_EOI; 3239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project val = (*cinfo->marker->read_markers) (cinfo); 3259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (val) { 3279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case JPEG_REACHED_SOS: /* Found SOS */ 3289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (inputctl->inheaders) { /* 1st SOS */ 3299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project initial_setup(cinfo); 3309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->inheaders = FALSE; 3319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note: start_input_pass must be called by jdmaster.c 3329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * before any more input can be consumed. jdapimin.c is 3339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * responsible for enforcing this sequencing. 3349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { /* 2nd or later SOS marker */ 3369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! inputctl->pub.has_multiple_scans) 3379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_EOI_EXPECTED); /* Oops, I wasn't expecting this! */ 3389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_input_pass(cinfo); 3399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 3419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case JPEG_REACHED_EOI: /* Found EOI */ 3429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.eoi_reached = TRUE; 3439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (inputctl->inheaders) { /* Tables-only datastream, apparently */ 3449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->marker->saw_SOF) 3459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_SOF_NO_SOS); 3469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 3479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Prevent infinite loop in coef ctlr's decompress_data routine 3489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * if user set output_scan_number larger than number of scans. 3499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->output_scan_number > cinfo->input_scan_number) 3519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->output_scan_number = cinfo->input_scan_number; 3529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 3549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case JPEG_SUSPENDED: 3559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 3569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return val; 3599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 3639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Reset state to begin a fresh datastream. 3649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 3679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectreset_input_controller (j_decompress_ptr cinfo) 3689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl; 3709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.consume_input = consume_markers; 372f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen inputctl->pub.consume_input_build_huffman_index = 373f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen consume_markers_with_huffman_index; 3749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.has_multiple_scans = FALSE; /* "unknown" would be better */ 3759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.eoi_reached = FALSE; 3769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->inheaders = TRUE; 3779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reset other modules */ 3789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo); 3799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->marker->reset_marker_reader) (cinfo); 3809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reset progression state -- would be cleaner if entropy decoder did this */ 3819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->coef_bits = NULL; 3829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 3869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize the input controller module. 3879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This is called only once, when the decompression object is created. 3889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 3919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjinit_input_controller (j_decompress_ptr cinfo) 3929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_inputctl_ptr inputctl; 3949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create subobject in permanent pool */ 3969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl = (my_inputctl_ptr) 3979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, 3989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(my_input_controller)); 3999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->inputctl = (struct jpeg_input_controller *) inputctl; 4009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Initialize method pointers */ 4019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.consume_input = consume_markers; 4029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.reset_input_controller = reset_input_controller; 4039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.start_input_pass = start_input_pass; 4049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.finish_input_pass = finish_input_pass; 4053147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 406f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen inputctl->pub.consume_markers = consume_markers_with_huffman_index; 407f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen inputctl->pub.consume_input_build_huffman_index = 408f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen consume_markers_with_huffman_index; 4099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Initialize state: can't use reset_input_controller since we don't 4109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * want to try to reset other modules yet. 4119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 4129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.has_multiple_scans = FALSE; /* "unknown" would be better */ 4139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->pub.eoi_reached = FALSE; 4149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inputctl->inheaders = TRUE; 4159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 416