19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jdcoefct.c 39f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 49f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Copyright (C) 1994-1997, 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 the coefficient buffer controller for decompression. 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This controller is the top level of the JPEG decompressor proper. 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The coefficient buffer lies between entropy decoding and inverse-DCT steps. 119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In buffered-image mode, this controller is the interface between 139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * input-oriented processing and output-oriented processing. 149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Also, the input side (only) is used when reading a file for transcoding. 159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define JPEG_INTERNALS 189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jinclude.h" 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jpeglib.h" 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Block smoothing is only applicable for progressive JPEG, so: */ 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef D_PROGRESSIVE_SUPPORTED 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#undef BLOCK_SMOOTHING_SUPPORTED 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Private buffer controller object */ 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef struct { 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project struct jpeg_d_coef_controller pub; /* public fields */ 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* These variables keep track of the current location of the input side. */ 329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* cinfo->input_iMCU_row is also used for this. */ 339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION MCU_ctr; /* counts MCUs processed in current row */ 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int MCU_vert_offset; /* counts MCU rows within iMCU row */ 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int MCU_rows_per_iMCU_row; /* number of such rows needed */ 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* The output side's location is represented by cinfo->output_iMCU_row. */ 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* In single-pass modes, it's sufficient to buffer just one MCU. 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We allocate a workspace of D_MAX_BLOCKS_IN_MCU coefficient blocks, 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and let the entropy decoder write into that workspace each time. 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * (On 80x86, the workspace is FAR even though it's not really very big; 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * this is to keep the module interfaces unchanged when a large coefficient 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * buffer is necessary.) 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In multi-pass modes, this array points to the current MCU's blocks 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * within the virtual arrays; it is used only by the input side. 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW MCU_buffer[D_MAX_BLOCKS_IN_MCU]; 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef D_MULTISCAN_FILES_SUPPORTED 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* In multi-pass modes, we need a virtual block array for each component. */ 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jvirt_barray_ptr whole_image[MAX_COMPONENTS]; 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef BLOCK_SMOOTHING_SUPPORTED 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* When doing block smoothing, we latch coefficient Al values here */ 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int * coef_bits_latch; 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define SAVED_COEFS 6 /* we save coef_bits[0..5] */ 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} my_coef_controller; 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef my_coef_controller * my_coef_ptr; 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Forward declarations */ 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) decompress_onepass 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef D_MULTISCAN_FILES_SUPPORTED 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) decompress_data 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef BLOCK_SMOOTHING_SUPPORTED 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) smoothing_ok JPP((j_decompress_ptr cinfo)); 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) decompress_smooth_data 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_iMCU_row (j_decompress_ptr cinfo) 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Reset within-iMCU-row counters for a new row (input side) */ 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* In an interleaved scan, an MCU row is the same as an iMCU row. 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows. 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * But at the bottom of the image, process only what's left. 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comps_in_scan > 1) { 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = 1; 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->input_iMCU_row < (cinfo->total_iMCU_rows-1)) 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor; 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height; 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_ctr = 0; 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_vert_offset = 0; 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize for an input processing pass. 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_input_pass (j_decompress_ptr cinfo) 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->input_iMCU_row = 0; 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize for an output processing pass. 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 1199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_output_pass (j_decompress_ptr cinfo) 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef BLOCK_SMOOTHING_SUPPORTED 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If multipass, check to see whether to use block smoothing on this pass */ 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->pub.coef_arrays != NULL) { 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->do_block_smoothing && smoothing_ok(cinfo)) 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.decompress_data = decompress_smooth_data; 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.decompress_data = decompress_data; 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->output_iMCU_row = 0; 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Decompress and return some data in the single-pass case. 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Always attempts to emit one fully interleaved MCU row ("iMCU" row). 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Input and output must run in lockstep since we have only a one-MCU buffer. 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED. 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: output_buf contains a plane for each component in image, 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * which we index according to the component's SOF position. 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectdecompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION MCU_col_num; /* index of current MCU within row */ 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1; 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int blkn, ci, xindex, yindex, yoffset, useful_width; 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JSAMPARRAY output_ptr; 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION start_col, output_col; 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inverse_DCT_method_ptr inverse_DCT; 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 159f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#ifdef ANDROID_TILE_BASED_DECODE 160f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->tile_decode) { 161f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen last_MCU_col = 162f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (cinfo->coef->MCU_column_right_boundary - 163f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->coef->MCU_column_left_boundary) - 1; 164f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 165f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#endif 166f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop to process as much as one whole iMCU row */ 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset++) { 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (MCU_col_num = coef->MCU_ctr; MCU_col_num <= last_MCU_col; 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_col_num++) { 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Try to fetch an MCU. Entropy decoder expects buffer to be zeroed. */ 173e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen if (MCU_col_num < coef->pub.MCU_columns_to_skip) { 174e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen (*cinfo->entropy->decode_mcu_discard_coef) (cinfo); 175e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen continue; 176e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen } else { 177e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen jzero_far((void FAR *) coef->MCU_buffer[0], 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (size_t) (cinfo->blocks_in_MCU * SIZEOF(JBLOCK))); 179e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) { 180e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen /* Suspension forced; update state counters and exit */ 181e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen coef->MCU_vert_offset = yoffset; 182e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen coef->MCU_ctr = MCU_col_num; 183e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen return JPEG_SUSPENDED; 184e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen } 1859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Determine where data should go in output_buf and do the IDCT thing. 1879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We skip dummy blocks at the right and bottom edges (but blkn gets 1889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * incremented past them!). Note the inner loop relies on having 1899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * allocated the MCU_buffer[] blocks sequentially. 1909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn = 0; /* index of current DCT block within MCU */ 1929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Don't bother to IDCT an uninteresting component. */ 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! compptr->component_needed) { 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn += compptr->MCU_blocks; 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project continue; 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inverse_DCT = cinfo->idct->inverse_DCT[compptr->component_index]; 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project useful_width = (MCU_col_num < last_MCU_col) ? compptr->MCU_width 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project : compptr->last_col_width; 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr = output_buf[compptr->component_index] + 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset * compptr->DCT_scaled_size; 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_col = MCU_col_num * compptr->MCU_sample_width; 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yindex = 0; yindex < compptr->MCU_height; yindex++) { 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->input_iMCU_row < last_iMCU_row || 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset+yindex < compptr->last_row_height) { 2089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_col = start_col; 2099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (xindex = 0; xindex < useful_width; xindex++) { 2109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*inverse_DCT) (cinfo, compptr, 211e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen (JCOEFPTR) coef->MCU_buffer[blkn+xindex], 212e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen output_ptr, output_col); 2139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_col += compptr->DCT_scaled_size; 2149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn += compptr->MCU_width; 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr += compptr->DCT_scaled_size; 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed an MCU row, but perhaps not an iMCU row */ 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_ctr = 0; 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the iMCU row, advance counters for next one */ 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->output_iMCU_row++; 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) { 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_ROW_COMPLETED; 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the scan */ 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->inputctl->finish_input_pass) (cinfo); 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SCAN_COMPLETED; 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Dummy consume-input routine for single-pass operation. 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectdummy_consume_data (j_decompress_ptr cinfo) 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; /* Always indicate nothing was done */ 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef D_MULTISCAN_FILES_SUPPORTED 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Consume input data and store it in the full-image coefficient buffer. 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We read as much as one fully interleaved MCU row ("iMCU" row) per call, 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * ie, v_samp_factor block rows for each component in the scan. 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED. 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectconsume_data (j_decompress_ptr cinfo) 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION MCU_col_num; /* index of current MCU within row */ 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int blkn, ci, xindex, yindex, yoffset; 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION start_col; 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN]; 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer_ptr; 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Align the virtual buffers for the components used in this scan. */ 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer[ci] = (*cinfo->mem->access_virt_barray) 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index], 270f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->tile_decode ? 0 : cinfo->input_iMCU_row * compptr->v_samp_factor, 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) compptr->v_samp_factor, TRUE); 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note: entropy decoder expects buffer to be zeroed, 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but this is handled automatically by the memory manager 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * because we requested a pre-zeroed array. 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 277f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen unsigned int MCUs_per_row = cinfo->MCUs_per_row; 278f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#ifdef ANDROID_TILE_BASED_DECODE 279f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->tile_decode) { 2802fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen int iMCU_width_To_MCU_width; 2812fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen if (cinfo->comps_in_scan > 1) { 2822fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen // Interleaved 2832fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen iMCU_width_To_MCU_width = 1; 2842fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen } else { 2852fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen // Non-intervleaved 2862fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen iMCU_width_To_MCU_width = cinfo->cur_comp_info[0]->h_samp_factor; 2872fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen } 288cc66ecf44d1407039b05ffd7b3342389f95c17b7Joseph Wen MCUs_per_row = jmin(MCUs_per_row, 289f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (cinfo->coef->column_right_boundary - cinfo->coef->column_left_boundary) 2902fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen * cinfo->entropy->index->MCU_sample_size * iMCU_width_To_MCU_width); 291f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 292f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#endif 293f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 2949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop to process one whole iMCU row */ 2959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 2969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset++) { 2972fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen // configure huffman decoder 298f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#ifdef ANDROID_TILE_BASED_DECODE 299f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->tile_decode) { 300f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_scan_header scan_header = 301f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->entropy->index->scan[cinfo->input_scan_number]; 302f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int col_offset = cinfo->coef->column_left_boundary; 303f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->entropy->configure_huffman_decoder) (cinfo, 304f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header.offset[cinfo->input_iMCU_row] 305f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen [col_offset + yoffset * scan_header.MCUs_per_row]); 306f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 307f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#endif 3082fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen 3092fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen // zero all blocks 310f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (MCU_col_num = coef->MCU_ctr; MCU_col_num < MCUs_per_row; 3112fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen MCU_col_num++) { 3129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Construct list of pointers to DCT blocks belonging to this MCU */ 3139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn = 0; /* index of current DCT block within MCU */ 3149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 3153147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen compptr = cinfo->cur_comp_info[ci]; 3163147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen start_col = MCU_col_num * compptr->MCU_width; 3173147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen for (yindex = 0; yindex < compptr->MCU_height; yindex++) { 3183147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen buffer_ptr = buffer[ci][yindex+yoffset] + start_col; 3193147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen for (xindex = 0; xindex < compptr->MCU_width; xindex++) { 3203147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen coef->MCU_buffer[blkn++] = buffer_ptr++; 321f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#ifdef ANDROID_TILE_BASED_DECODE 322f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->tile_decode && cinfo->input_scan_number == 0) { 3232fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen // need to do pre-zero ourselves. 324f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jzero_far((void FAR *) coef->MCU_buffer[blkn-1], 325f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (size_t) (SIZEOF(JBLOCK))); 326f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 327f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#endif 3283147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 3293147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 3309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3312fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen 3322fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen 3339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Try to fetch the MCU. */ 3349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) { 3352fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen /* Suspension forced; update state counters and exit */ 3362fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen coef->MCU_vert_offset = yoffset; 3372fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen coef->MCU_ctr = MCU_col_num; 3382fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen return JPEG_SUSPENDED; 3399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed an MCU row, but perhaps not an iMCU row */ 3429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_ctr = 0; 3439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the iMCU row, advance counters for next one */ 3459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) { 3469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 3479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_ROW_COMPLETED; 3489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the scan */ 3509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->inputctl->finish_input_pass) (cinfo); 3519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SCAN_COMPLETED; 3529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 354f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen/* 355f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * Consume input data and store it in the coefficient buffer. 356f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * Read one fully interleaved MCU row ("iMCU" row) per call. 357f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 358f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 359f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph WenMETHODDEF(int) 360f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wenconsume_data_multi_scan (j_decompress_ptr cinfo) 361f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen{ 362f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_index *index = cinfo->entropy->index; 363f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int i, retcode, ci; 364f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int mcu = cinfo->input_iMCU_row; 365f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jinit_phuff_decoder(cinfo); 366f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (i = 0; i < index->scan_count; i++) { 367f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->inputctl->finish_input_pass) (cinfo); 368f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jset_input_stream_position(cinfo, index->scan[i].bitstream_offset); 369f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->output_iMCU_row = mcu; 370f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->unread_marker = 0; 371f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen // Consume SOS and DHT headers 372f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen retcode = (*cinfo->inputctl->consume_markers) (cinfo, index, i); 373f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->input_iMCU_row = mcu; 374f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->input_scan_number = i; 375f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->entropy->index = index; 376f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen // Consume scan block data 377f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen consume_data(cinfo); 378f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 379f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->input_iMCU_row = mcu + 1; 380f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->input_scan_number = 0; 381f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->output_scan_number = 0; 382f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen return JPEG_ROW_COMPLETED; 383f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen} 384f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 3853147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen/* 3863147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen * Same as consume_data, expect for saving the Huffman decode information 3873147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen * - bitstream offset and DC coefficient to index. 3883147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen */ 3893147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 3903147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph WenMETHODDEF(int) 391f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wenconsume_data_build_huffman_index_baseline (j_decompress_ptr cinfo, 392f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_index *index, int current_scan) 3933147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen{ 3943147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 3953147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen JDIMENSION MCU_col_num; /* index of current MCU within row */ 3963147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen int ci, xindex, yindex, yoffset; 3973147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen JDIMENSION start_col; 3983147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen JBLOCKROW buffer_ptr; 3993147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 400f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_scan_header *scan_header = index->scan + current_scan; 401f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header->MCU_rows_per_iMCU_row = coef->MCU_rows_per_iMCU_row; 4023147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 4033147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen size_t allocate_size = coef->MCU_rows_per_iMCU_row 404f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * jdiv_round_up(cinfo->MCUs_per_row, index->MCU_sample_size) 4053147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen * sizeof(huffman_offset_data); 406f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header->offset[cinfo->input_iMCU_row] = 407f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (huffman_offset_data*)malloc(allocate_size); 4083147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen index->mem_used += allocate_size; 4093147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 410f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_offset_data *offset_data = scan_header->offset[cinfo->input_iMCU_row]; 4113147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 4123147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen /* Loop to process one whole iMCU row */ 4133147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 4143147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen yoffset++) { 4153147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen for (MCU_col_num = coef->MCU_ctr; MCU_col_num < cinfo->MCUs_per_row; 4163147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen MCU_col_num++) { 4173147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen // Record huffman bit offset 4183147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen if (MCU_col_num % index->MCU_sample_size == 0) { 419f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->entropy->get_huffman_decoder_configuration) 420f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (cinfo, offset_data); 4213147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen ++offset_data; 4223147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 4233147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 4243147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen /* Try to fetch the MCU. */ 4253147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen if (! (*cinfo->entropy->decode_mcu_discard_coef) (cinfo)) { 4263147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen /* Suspension forced; update state counters and exit */ 4273147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen coef->MCU_vert_offset = yoffset; 4283147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen coef->MCU_ctr = MCU_col_num; 4293147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen return JPEG_SUSPENDED; 4303147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 4313147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 4323147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen /* Completed an MCU row, but perhaps not an iMCU row */ 4333147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen coef->MCU_ctr = 0; 4343147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 4353147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen /* Completed the iMCU row, advance counters for next one */ 4363147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) { 4373147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen start_iMCU_row(cinfo); 4383147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen return JPEG_ROW_COMPLETED; 4393147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen } 4403147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen /* Completed the scan */ 4413147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen (*cinfo->inputctl->finish_input_pass) (cinfo); 4423147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen return JPEG_SCAN_COMPLETED; 4433147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen} 4443147fbe7688fc353e6ae03825a37cf101a4ee01dJoseph Wen 445f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen/* 446f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * Same as consume_data, expect for saving the Huffman decode information 447f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * - bitstream offset and DC coefficient to index. 448f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 449f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 450f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph WenMETHODDEF(int) 451f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wenconsume_data_build_huffman_index_progressive (j_decompress_ptr cinfo, 452f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_index *index, int current_scan) 453f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen{ 454f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 455f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen JDIMENSION MCU_col_num; /* index of current MCU within row */ 456f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int blkn, ci, xindex, yindex, yoffset; 457f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen JDIMENSION start_col; 458f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN]; 459f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen JBLOCKROW buffer_ptr; 460f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jpeg_component_info *compptr; 461f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 462f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int factor = 4; // maximum factor is 4. 463f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (ci = 0; ci < cinfo->comps_in_scan; ci++) 464f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen factor = jmin(factor, cinfo->cur_comp_info[ci]->h_samp_factor); 465f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 466f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int sample_size = index->MCU_sample_size * factor; 467f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_scan_header *scan_header = index->scan + current_scan; 468f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header->MCU_rows_per_iMCU_row = coef->MCU_rows_per_iMCU_row; 469f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header->MCUs_per_row = jdiv_round_up(cinfo->MCUs_per_row, sample_size); 470f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header->comps_in_scan = cinfo->comps_in_scan; 471f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 472f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen size_t allocate_size = coef->MCU_rows_per_iMCU_row 473f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * scan_header->MCUs_per_row * sizeof(huffman_offset_data); 474f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen scan_header->offset[cinfo->input_iMCU_row] = 475f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (huffman_offset_data*)malloc(allocate_size); 476f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen index->mem_used += allocate_size; 477f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 478f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen huffman_offset_data *offset_data = scan_header->offset[cinfo->input_iMCU_row]; 479f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 480f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Align the virtual buffers for the components used in this scan. */ 481f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 482f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen compptr = cinfo->cur_comp_info[ci]; 483f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen buffer[ci] = (*cinfo->mem->access_virt_barray) 484f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index], 485f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 0, // Only need one row buffer 486f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (JDIMENSION) compptr->v_samp_factor, TRUE); 487f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 488f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Loop to process one whole iMCU row */ 489f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 490f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen yoffset++) { 491f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (MCU_col_num = coef->MCU_ctr; MCU_col_num < cinfo->MCUs_per_row; 492f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen MCU_col_num++) { 493f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* For each MCU, we loop through different color components. 494f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * Then, for each color component we will get a list of pointers to DCT 495f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * blocks in the virtual buffer. 496f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 497f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen blkn = 0; /* index of current DCT block within MCU */ 498f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 499f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen compptr = cinfo->cur_comp_info[ci]; 500f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen start_col = MCU_col_num * compptr->MCU_width; 501f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Get the list of pointers to DCT blocks in 502f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * the virtual buffer in a color component of the MCU. 503f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 504f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (yindex = 0; yindex < compptr->MCU_height; yindex++) { 505f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen buffer_ptr = buffer[ci][yindex+yoffset] + start_col; 506f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (xindex = 0; xindex < compptr->MCU_width; xindex++) { 507f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->MCU_buffer[blkn++] = buffer_ptr++; 508f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->input_scan_number == 0) { 509f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen // need to do pre-zero by ourself. 510f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jzero_far((void FAR *) coef->MCU_buffer[blkn-1], 511f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (size_t) (SIZEOF(JBLOCK))); 512f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 513f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 514f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 515f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 516f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen // Record huffman bit offset 517f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (MCU_col_num % sample_size == 0) { 518f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->entropy->get_huffman_decoder_configuration) 519f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (cinfo, offset_data); 520f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen ++offset_data; 521f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 522f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Try to fetch the MCU. */ 523f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) { 524f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Suspension forced; update state counters and exit */ 525f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->MCU_vert_offset = yoffset; 526f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->MCU_ctr = MCU_col_num; 527f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen return JPEG_SUSPENDED; 528f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 529f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 530f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Completed an MCU row, but perhaps not an iMCU row */ 531f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->MCU_ctr = 0; 532f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 533f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->entropy->get_huffman_decoder_configuration) 534f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (cinfo, &scan_header->prev_MCU_offset); 535f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Completed the iMCU row, advance counters for next one */ 536f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) { 537f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen start_iMCU_row(cinfo); 538f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen return JPEG_ROW_COMPLETED; 539f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 540f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Completed the scan */ 541f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->inputctl->finish_input_pass) (cinfo); 542f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen return JPEG_SCAN_COMPLETED; 543f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen} 5449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 5469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Decompress and return some data in the multi-pass case. 5479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Always attempts to emit one fully interleaved MCU row ("iMCU" row). 5489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED. 5499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 5509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: output_buf contains a plane for each component in image. 5519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 5529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 5549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectdecompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) 5559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 5569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 5579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; 5589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION block_num; 5599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci, block_row, block_rows; 5609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKARRAY buffer; 5619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer_ptr; 5629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JSAMPARRAY output_ptr; 5639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION output_col; 5649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 5659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inverse_DCT_method_ptr inverse_DCT; 5669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Force some input to be done if we are getting ahead of the input. */ 5689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (cinfo->input_scan_number < cinfo->output_scan_number || 5699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (cinfo->input_scan_number == cinfo->output_scan_number && 5709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->input_iMCU_row <= cinfo->output_iMCU_row)) { 5719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED) 5729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 5739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* OK, output from the virtual arrays. */ 5769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 5779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 5789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Don't bother to IDCT an uninteresting component. */ 5799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! compptr->component_needed) 5809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project continue; 5819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Align the virtual buffer for this component. */ 5829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (*cinfo->mem->access_virt_barray) 5839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[ci], 584f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->tile_decode ? 0 : cinfo->output_iMCU_row * compptr->v_samp_factor, 5859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) compptr->v_samp_factor, FALSE); 5869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Count non-dummy DCT block rows in this iMCU row. */ 5879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->output_iMCU_row < last_iMCU_row) 5889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_rows = compptr->v_samp_factor; 5899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else { 5909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* NB: can't use last_row_height here; it is input-side-dependent! */ 5919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 5929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (block_rows == 0) block_rows = compptr->v_samp_factor; 5939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inverse_DCT = cinfo->idct->inverse_DCT[ci]; 5959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr = output_buf[ci]; 596e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen int width_in_blocks = compptr->width_in_blocks; 597e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen int start_block = 0; 598e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen#if ANDROID_TILE_BASED_DECODE 599e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen if (cinfo->tile_decode) { 6002fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen // width_in_blocks for a component depends on its h_samp_factor. 601e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen width_in_blocks = jmin(width_in_blocks, 602e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen (cinfo->coef->MCU_column_right_boundary - 603e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen cinfo->coef->MCU_column_left_boundary) * 604e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen compptr->h_samp_factor); 605e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen start_block = coef->pub.MCU_columns_to_skip * 6062fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen compptr->h_samp_factor; 6072fa18d458a5545e7f6cc431954f19e136dfedc9eWei-Ta Chen } 608e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen#endif 6099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop over all DCT blocks to be processed. */ 6109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (block_row = 0; block_row < block_rows; block_row++) { 6119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer_ptr = buffer[block_row]; 612e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen output_col = start_block * compptr->DCT_scaled_size; 613e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen buffer_ptr += start_block; 614e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen for (block_num = start_block; block_num < width_in_blocks; block_num++) { 6159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*inverse_DCT) (cinfo, compptr, (JCOEFPTR) buffer_ptr, 6169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr, output_col); 6179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer_ptr++; 6189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_col += compptr->DCT_scaled_size; 6199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 6209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr += compptr->DCT_scaled_size; 6219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 6229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 6239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++(cinfo->output_iMCU_row) < cinfo->total_iMCU_rows) 6259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_ROW_COMPLETED; 6269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SCAN_COMPLETED; 6279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 6289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* D_MULTISCAN_FILES_SUPPORTED */ 6309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef BLOCK_SMOOTHING_SUPPORTED 6339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 6359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This code applies interblock smoothing as described by section K.8 6369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * of the JPEG standard: the first 5 AC coefficients are estimated from 6379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the DC values of a DCT block and its 8 neighboring blocks. 6389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We apply smoothing only for progressive JPEG decoding, and only if 6399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the coefficients it can estimate are not yet known to full precision. 6409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 6419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Natural-order array positions of the first 5 zigzag-order coefficients */ 6439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define Q01_POS 1 6449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define Q10_POS 8 6459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define Q20_POS 16 6469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define Q11_POS 9 6479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define Q02_POS 2 6489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 6509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Determine whether block smoothing is applicable and safe. 6519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We also latch the current states of the coef_bits[] entries for the 6529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * AC coefficients; otherwise, if the input side of the decompressor 6539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * advances into a new scan, we might think the coefficients are known 6549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * more accurately than they really are. 6559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 6569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 6589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectsmoothing_ok (j_decompress_ptr cinfo) 6599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 6609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 6619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project boolean smoothing_useful = FALSE; 6629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci, coefi; 6639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 6649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JQUANT_TBL * qtable; 6659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int * coef_bits; 6669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int * coef_bits_latch; 6679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! cinfo->progressive_mode || cinfo->coef_bits == NULL) 6699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 6709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Allocate latch area if not already done */ 6729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->coef_bits_latch == NULL) 6739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->coef_bits_latch = (int *) 6749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 6759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->num_components * 6769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (SAVED_COEFS * SIZEOF(int))); 6779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef_bits_latch = coef->coef_bits_latch; 6789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 6809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 6819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* All components' quantization values must already be latched. */ 6829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((qtable = compptr->quant_table) == NULL) 6839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 6849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Verify DC & first 5 AC quantizers are nonzero to avoid zero-divide. */ 6859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (qtable->quantval[0] == 0 || 6869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtable->quantval[Q01_POS] == 0 || 6879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtable->quantval[Q10_POS] == 0 || 6889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtable->quantval[Q20_POS] == 0 || 6899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtable->quantval[Q11_POS] == 0 || 6909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtable->quantval[Q02_POS] == 0) 6919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 6929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* DC values must be at least partly known for all components. */ 6939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef_bits = cinfo->coef_bits[ci]; 6949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef_bits[0] < 0) 6959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 6969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Block smoothing is helpful if some AC coefficients remain inaccurate. */ 6979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (coefi = 1; coefi <= 5; coefi++) { 6989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef_bits_latch[coefi] = coef_bits[coefi]; 6999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef_bits[coefi] != 0) 7009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project smoothing_useful = TRUE; 7019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef_bits_latch += SAVED_COEFS; 7039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return smoothing_useful; 7069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 7079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 7109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Variant of decompress_data for use when doing block smoothing. 7119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 7129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 7149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectdecompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) 7159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 7169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 7179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; 7189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION block_num, last_block_column; 7199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci, block_row, block_rows, access_rows; 7209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKARRAY buffer; 7219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer_ptr, prev_block_row, next_block_row; 7229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JSAMPARRAY output_ptr; 7239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION output_col; 7249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 7259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inverse_DCT_method_ptr inverse_DCT; 7269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project boolean first_row, last_row; 7279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCK workspace; 7289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int *coef_bits; 7299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JQUANT_TBL *quanttbl; 7309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 Q00,Q01,Q02,Q10,Q11,Q20, num; 7319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int DC1,DC2,DC3,DC4,DC5,DC6,DC7,DC8,DC9; 7329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int Al, pred; 7339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Force some input to be done if we are getting ahead of the input. */ 7359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (cinfo->input_scan_number <= cinfo->output_scan_number && 7369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ! cinfo->inputctl->eoi_reached) { 7379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->input_scan_number == cinfo->output_scan_number) { 7389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If input is working on current scan, we ordinarily want it to 7399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * have completed the current row. But if input scan is DC, 7409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * we want it to keep one row ahead so that next block row's DC 7419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * values are up to date. 7429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 7439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION delta = (cinfo->Ss == 0) ? 1 : 0; 7449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->input_iMCU_row > cinfo->output_iMCU_row+delta) 7459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 7469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED) 7489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 7499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* OK, output from the virtual arrays. */ 7529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 7539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 7549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Don't bother to IDCT an uninteresting component. */ 7559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! compptr->component_needed) 7569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project continue; 7579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Count non-dummy DCT block rows in this iMCU row. */ 7589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->output_iMCU_row < last_iMCU_row) { 7599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_rows = compptr->v_samp_factor; 7609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project access_rows = block_rows * 2; /* this and next iMCU row */ 7619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project last_row = FALSE; 7629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 7639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* NB: can't use last_row_height here; it is input-side-dependent! */ 7649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 7659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (block_rows == 0) block_rows = compptr->v_samp_factor; 7669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project access_rows = block_rows; /* this iMCU row only */ 7679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project last_row = TRUE; 7689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Align the virtual buffer for this component. */ 7709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->output_iMCU_row > 0) { 7719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project access_rows += compptr->v_samp_factor; /* prior iMCU row too */ 7729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (*cinfo->mem->access_virt_barray) 7739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[ci], 7749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (cinfo->output_iMCU_row - 1) * compptr->v_samp_factor, 7759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) access_rows, FALSE); 7769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer += compptr->v_samp_factor; /* point to current iMCU row */ 7779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project first_row = FALSE; 7789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 7799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (*cinfo->mem->access_virt_barray) 7809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[ci], 7819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) 0, (JDIMENSION) access_rows, FALSE); 7829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project first_row = TRUE; 7839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Fetch component-dependent info */ 7859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef_bits = coef->coef_bits_latch + (ci * SAVED_COEFS); 7869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quanttbl = compptr->quant_table; 7879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Q00 = quanttbl->quantval[0]; 7889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Q01 = quanttbl->quantval[Q01_POS]; 7899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Q10 = quanttbl->quantval[Q10_POS]; 7909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Q20 = quanttbl->quantval[Q20_POS]; 7919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Q11 = quanttbl->quantval[Q11_POS]; 7929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Q02 = quanttbl->quantval[Q02_POS]; 7939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project inverse_DCT = cinfo->idct->inverse_DCT[ci]; 7949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr = output_buf[ci]; 7959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop over all DCT blocks to be processed. */ 7969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (block_row = 0; block_row < block_rows; block_row++) { 7979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer_ptr = buffer[block_row]; 7989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (first_row && block_row == 0) 7999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project prev_block_row = buffer_ptr; 8009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 8019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project prev_block_row = buffer[block_row-1]; 8029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (last_row && block_row == block_rows-1) 8039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project next_block_row = buffer_ptr; 8049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 8059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project next_block_row = buffer[block_row+1]; 8069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We fetch the surrounding DC values using a sliding-register approach. 8079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize all nine here so as to do the right thing on narrow pics. 8089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 8099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC1 = DC2 = DC3 = (int) prev_block_row[0][0]; 8109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC4 = DC5 = DC6 = (int) buffer_ptr[0][0]; 8119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC7 = DC8 = DC9 = (int) next_block_row[0][0]; 8129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_col = 0; 8139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project last_block_column = compptr->width_in_blocks - 1; 8149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (block_num = 0; block_num <= last_block_column; block_num++) { 8159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Fetch current DCT block into workspace so we can modify it. */ 8169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jcopy_block_row(buffer_ptr, (JBLOCKROW) workspace, (JDIMENSION) 1); 8179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Update DC values */ 8189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (block_num < last_block_column) { 8199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC3 = (int) prev_block_row[1][0]; 8209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC6 = (int) buffer_ptr[1][0]; 8219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC9 = (int) next_block_row[1][0]; 8229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Compute coefficient estimates per K.8. 8249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * An estimate is applied only if coefficient is still zero, 8259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and is not known to be fully accurate. 8269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 8279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* AC01 */ 8289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((Al=coef_bits[1]) != 0 && workspace[1] == 0) { 8299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project num = 36 * Q00 * (DC4 - DC6); 8309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (num >= 0) { 8319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q01<<7) + num) / (Q01<<8)); 8329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 8359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q01<<7) - num) / (Q01<<8)); 8369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = -pred; 8399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project workspace[1] = (JCOEF) pred; 8419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* AC10 */ 8439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((Al=coef_bits[2]) != 0 && workspace[8] == 0) { 8449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project num = 36 * Q00 * (DC2 - DC8); 8459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (num >= 0) { 8469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q10<<7) + num) / (Q10<<8)); 8479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 8509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q10<<7) - num) / (Q10<<8)); 8519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = -pred; 8549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project workspace[8] = (JCOEF) pred; 8569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* AC20 */ 8589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((Al=coef_bits[3]) != 0 && workspace[16] == 0) { 8599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project num = 9 * Q00 * (DC2 + DC8 - 2*DC5); 8609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (num >= 0) { 8619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q20<<7) + num) / (Q20<<8)); 8629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 8659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q20<<7) - num) / (Q20<<8)); 8669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = -pred; 8699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project workspace[16] = (JCOEF) pred; 8719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* AC11 */ 8739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((Al=coef_bits[4]) != 0 && workspace[9] == 0) { 8749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project num = 5 * Q00 * (DC1 - DC3 - DC7 + DC9); 8759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (num >= 0) { 8769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q11<<7) + num) / (Q11<<8)); 8779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 8809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q11<<7) - num) / (Q11<<8)); 8819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = -pred; 8849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project workspace[9] = (JCOEF) pred; 8869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* AC02 */ 8889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((Al=coef_bits[5]) != 0 && workspace[2] == 0) { 8899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project num = 9 * Q00 * (DC4 + DC6 - 2*DC5); 8909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (num >= 0) { 8919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q02<<7) + num) / (Q02<<8)); 8929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 8959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (int) (((Q02<<7) - num) / (Q02<<8)); 8969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (Al > 0 && pred >= (1<<Al)) 8979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = (1<<Al)-1; 8989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project pred = -pred; 8999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project workspace[2] = (JCOEF) pred; 9019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* OK, do the IDCT */ 9039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*inverse_DCT) (cinfo, compptr, (JCOEFPTR) workspace, 9049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr, output_col); 9059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Advance for next column */ 9069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC1 = DC2; DC2 = DC3; 9079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC4 = DC5; DC5 = DC6; 9089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DC7 = DC8; DC8 = DC9; 9099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer_ptr++, prev_block_row++, next_block_row++; 9109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_col += compptr->DCT_scaled_size; 9119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project output_ptr += compptr->DCT_scaled_size; 9139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (++(cinfo->output_iMCU_row) < cinfo->total_iMCU_rows) 9179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_ROW_COMPLETED; 9189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SCAN_COMPLETED; 9199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 9209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* BLOCK_SMOOTHING_SUPPORTED */ 9229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 9259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize coefficient buffer controller. 9269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 9279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 9299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer) 9309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 9319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef; 9329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef = (my_coef_ptr) 9349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 9359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(my_coef_controller)); 9369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->coef = (struct jpeg_d_coef_controller *) coef; 9379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.start_input_pass = start_input_pass; 9389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.start_output_pass = start_output_pass; 939f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.column_left_boundary = 0; 940f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.column_right_boundary = 0; 941e0eadaa39b72e33f032220246c771d7302ebeaf8Joseph Wen coef->pub.MCU_columns_to_skip = 0; 9429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef BLOCK_SMOOTHING_SUPPORTED 9439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->coef_bits_latch = NULL; 9449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 9459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 946f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#ifdef ANDROID_TILE_BASED_DECODE 947f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->tile_decode) { 948f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->progressive_mode) { 949f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* Allocate one iMCU row virtual array, coef->whole_image[ci], 950f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * for each color component, padded to a multiple of h_samp_factor 951f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * DCT blocks in the horizontal direction. 952f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 953f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int ci, access_rows; 954f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jpeg_component_info *compptr; 955f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 956f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 957f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen ci++, compptr++) { 958f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen access_rows = compptr->v_samp_factor; 959f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->whole_image[ci] = (*cinfo->mem->request_virt_barray) 960f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen ((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE, 961f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (JDIMENSION) jround_up((long) compptr->width_in_blocks, 962f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (long) compptr->h_samp_factor), 963f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (JDIMENSION) compptr->v_samp_factor, // one iMCU row 964f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (JDIMENSION) access_rows); 965f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 966f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.consume_data_build_huffman_index = 967f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen consume_data_build_huffman_index_progressive; 968f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.consume_data = consume_data_multi_scan; 969f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.coef_arrays = coef->whole_image; /* link to virtual arrays */ 970f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.decompress_data = decompress_onepass; 971f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } else { 972f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* We only need a single-MCU buffer. */ 973f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen JBLOCKROW buffer; 974f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int i; 975f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 976f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen buffer = (JBLOCKROW) 977f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 978f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); 979f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) { 980f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->MCU_buffer[i] = buffer + i; 981f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 982f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.consume_data_build_huffman_index = 983f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen consume_data_build_huffman_index_baseline; 984f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.consume_data = dummy_consume_data; 985f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.coef_arrays = NULL; /* flag for no virtual arrays */ 986f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen coef->pub.decompress_data = decompress_onepass; 987f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 988f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen return; 989f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 990f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen#endif 991f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 9929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create the coefficient buffer. */ 9939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (need_full_buffer) { 9949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef D_MULTISCAN_FILES_SUPPORTED 9959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Allocate a full-image virtual array for each component, */ 9969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* padded to a multiple of samp_factor DCT blocks in each direction. */ 9979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note we ask for a pre-zeroed array. */ 9989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci, access_rows; 9999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 10009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 10029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 10039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project access_rows = compptr->v_samp_factor; 10049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef BLOCK_SMOOTHING_SUPPORTED 10059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If block smoothing could be used, need a bigger window */ 10069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->progressive_mode) 10079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project access_rows *= 3; 10089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 10099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->whole_image[ci] = (*cinfo->mem->request_virt_barray) 10109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE, 10119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) jround_up((long) compptr->width_in_blocks, 10129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) compptr->h_samp_factor), 10139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) jround_up((long) compptr->height_in_blocks, 10149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) compptr->v_samp_factor), 10159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) access_rows); 10169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 10179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.consume_data = consume_data; 10189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.decompress_data = decompress_data; 10199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.coef_arrays = coef->whole_image; /* link to virtual arrays */ 10209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 10219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_NOT_COMPILED); 10229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 10239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 10249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We only need a single-MCU buffer. */ 10259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer; 10269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int i; 10279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (JBLOCKROW) 10299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 1030f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); 10319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) { 10329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_buffer[i] = buffer + i; 10339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 10349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.consume_data = dummy_consume_data; 10359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.decompress_data = decompress_onepass; 10369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.coef_arrays = NULL; /* flag for no virtual arrays */ 10379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 10389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1039