19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jctrans.c 39f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 49f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Copyright (C) 1995-1998, 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 library routines for transcoding compression, 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * that is, writing raw DCT coefficient arrays to an output JPEG file. 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The routines in jcapimin.c will also be needed by a transcoder. 119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define JPEG_INTERNALS 149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jinclude.h" 159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jpeglib.h" 169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Forward declarations */ 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) transencode_master_selection 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays)); 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) transencode_coef_controller 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays)); 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Compression initialization for writing raw-coefficient data. 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Before calling this, all parameters and a data destination must be set up. 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Call jpeg_finish_compress() to actually write the data. 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The number of passed virtual arrays must match cinfo->num_components. 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that the virtual arrays need not be filled or even realized at 329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the time write_coefficients is called; indeed, if the virtual arrays 339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * were requested from this compression object's memory manager, they 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * typically will be realized during this routine and filled afterwards. 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_write_coefficients (j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays) 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->global_state != CSTATE_START) 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Mark all tables to be written */ 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_suppress_tables(cinfo, FALSE); 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* (Re)initialize error mgr and destination modules */ 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo); 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->dest->init_destination) (cinfo); 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Perform master selection of active modules */ 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project transencode_master_selection(cinfo, coef_arrays); 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Wait for jpeg_finish_compress() call */ 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->next_scanline = 0; /* so jpeg_write_marker works */ 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->global_state = CSTATE_WRCOEFS; 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize the compression object with default parameters, 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * then copy from the source object all parameters needed for lossless 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * transcoding. Parameters that can be varied without loss (such as 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * scan script and Huffman optimization) are left in their default states. 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_copy_critical_parameters (j_decompress_ptr srcinfo, 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project j_compress_ptr dstinfo) 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JQUANT_TBL ** qtblptr; 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *incomp, *outcomp; 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JQUANT_TBL *c_quant, *slot_quant; 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int tblno, ci, coefi; 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Safety check to ensure start_compress not called yet. */ 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (dstinfo->global_state != CSTATE_START) 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(dstinfo, JERR_BAD_STATE, dstinfo->global_state); 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Copy fundamental image dimensions */ 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->image_width = srcinfo->image_width; 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->image_height = srcinfo->image_height; 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->input_components = srcinfo->num_components; 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->in_color_space = srcinfo->jpeg_color_space; 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Initialize all parameters to default values */ 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_set_defaults(dstinfo); 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* jpeg_set_defaults may choose wrong colorspace, eg YCbCr if input is RGB. 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Fix it to get the right header markers for the image colorspace. 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_set_colorspace(dstinfo, srcinfo->jpeg_color_space); 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->data_precision = srcinfo->data_precision; 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->CCIR601_sampling = srcinfo->CCIR601_sampling; 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Copy the source's quantization tables. */ 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) { 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (srcinfo->quant_tbl_ptrs[tblno] != NULL) { 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project qtblptr = & dstinfo->quant_tbl_ptrs[tblno]; 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (*qtblptr == NULL) 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project *qtblptr = jpeg_alloc_quant_table((j_common_ptr) dstinfo); 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MEMCOPY((*qtblptr)->quantval, 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project srcinfo->quant_tbl_ptrs[tblno]->quantval, 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF((*qtblptr)->quantval)); 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*qtblptr)->sent_table = FALSE; 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Copy the source's per-component info. 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note we assume jpeg_set_defaults has allocated the dest comp_info array. 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->num_components = srcinfo->num_components; 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (dstinfo->num_components < 1 || dstinfo->num_components > MAX_COMPONENTS) 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT2(dstinfo, JERR_COMPONENT_COUNT, dstinfo->num_components, 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAX_COMPONENTS); 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, incomp = srcinfo->comp_info, outcomp = dstinfo->comp_info; 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci < dstinfo->num_components; ci++, incomp++, outcomp++) { 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project outcomp->component_id = incomp->component_id; 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project outcomp->h_samp_factor = incomp->h_samp_factor; 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project outcomp->v_samp_factor = incomp->v_samp_factor; 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project outcomp->quant_tbl_no = incomp->quant_tbl_no; 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Make sure saved quantization table for component matches the qtable 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * slot. If not, the input file re-used this qtable slot. 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * IJG encoder currently cannot duplicate this. 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project tblno = outcomp->quant_tbl_no; 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (tblno < 0 || tblno >= NUM_QUANT_TBLS || 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project srcinfo->quant_tbl_ptrs[tblno] == NULL) 1199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(dstinfo, JERR_NO_QUANT_TABLE, tblno); 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project slot_quant = srcinfo->quant_tbl_ptrs[tblno]; 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project c_quant = incomp->quant_table; 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c_quant != NULL) { 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (coefi = 0; coefi < DCTSIZE2; coefi++) { 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c_quant->quantval[coefi] != slot_quant->quantval[coefi]) 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(dstinfo, JERR_MISMATCHED_QUANT_TABLE, tblno); 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note: we do not copy the source's Huffman table assignments; 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * instead we rely on jpeg_set_colorspace to have made a suitable choice. 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Also copy JFIF version and resolution information, if available. 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Strictly speaking this isn't "critical" info, but it's nearly 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * always appropriate to copy it if available. In particular, 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * if the application chooses to copy JFIF 1.02 extension markers from 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the source file, we need to copy the version to make sure we don't 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * emit a file that has 1.02 extensions but a claimed version of 1.01. 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We will *not*, however, copy version info from mislabeled "2.01" files. 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (srcinfo->saw_JFIF_marker) { 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (srcinfo->JFIF_major_version == 1) { 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->JFIF_major_version = srcinfo->JFIF_major_version; 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->JFIF_minor_version = srcinfo->JFIF_minor_version; 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->density_unit = srcinfo->density_unit; 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->X_density = srcinfo->X_density; 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project dstinfo->Y_density = srcinfo->Y_density; 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Master selection of compression modules for transcoding. 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This substitutes for jcinit.c's initialization of the full compressor. 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttransencode_master_selection (j_compress_ptr cinfo, 1599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jvirt_barray_ptr * coef_arrays) 1609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Although we don't actually use input_components for transcoding, 1629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jcmaster.c's initial_setup will complain if input_components is 0. 1639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->input_components = 1; 1659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Initialize master control (includes parameter checking/processing) */ 1669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jinit_c_master_control(cinfo, TRUE /* transcode only */); 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Entropy encoding: either Huffman or arithmetic coding. */ 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->arith_code) { 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_ARITH_NOTIMPL); 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->progressive_mode) { 1739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef C_PROGRESSIVE_SUPPORTED 1749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jinit_phuff_encoder(cinfo); 1759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 1769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_NOT_COMPILED); 1779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else 1799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jinit_huff_encoder(cinfo); 1809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We need a special coefficient buffer controller. */ 1839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project transencode_coef_controller(cinfo, coef_arrays); 1849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jinit_marker_writer(cinfo); 1869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We can now tell the memory manager to allocate virtual arrays. */ 1889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo); 1899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Write the datastream header (SOI, JFIF) immediately. 1919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Frame and scan headers are postponed till later. 1929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This lets application insert special markers after the SOI. 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->marker->write_file_header) (cinfo); 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The rest of this file is a special implementation of the coefficient 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * buffer controller. This is similar to jccoefct.c, but it handles only 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * output from presupplied virtual arrays. Furthermore, we generate any 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * dummy padding blocks on-the-fly rather than expecting them to be present 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * in the arrays. 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Private buffer controller object */ 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef struct { 2099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project struct jpeg_c_coef_controller pub; /* public fields */ 2109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION iMCU_row_num; /* iMCU row # within image */ 2129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION mcu_ctr; /* counts MCUs processed in current row */ 2139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int MCU_vert_offset; /* counts MCU rows within iMCU row */ 2149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int MCU_rows_per_iMCU_row; /* number of such rows needed */ 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Virtual block array for each component. */ 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jvirt_barray_ptr * whole_image; 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Workspace for constructing dummy blocks at right/bottom edges. */ 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW dummy_buffer[C_MAX_BLOCKS_IN_MCU]; 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} my_coef_controller; 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef my_coef_controller * my_coef_ptr; 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_iMCU_row (j_compress_ptr cinfo) 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Reset within-iMCU-row counters for a new row */ 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* In an interleaved scan, an MCU row is the same as an iMCU row. 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows. 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * But at the bottom of the image, process only what's left. 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comps_in_scan > 1) { 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = 1; 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1)) 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor; 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height; 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = 0; 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_vert_offset = 0; 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize for a processing pass. 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode) 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (pass_mode != JBUF_CRANK_DEST) 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num = 0; 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Process some data. 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We process the equivalent of one fully interleaved MCU row ("iMCU" row) 2709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * per call, ie, v_samp_factor block rows for each component in the scan. 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The data is obtained from the virtual arrays and fed to the entropy coder. 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns TRUE if the iMCU row is completed, FALSE if suspended. 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: input_buf is ignored; it is likely to be a NULL pointer. 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 2789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectcompress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf) 2799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 2819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION MCU_col_num; /* index of current MCU within row */ 2829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1; 2839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; 2849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int blkn, ci, xindex, yindex, yoffset, blockcnt; 2859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION start_col; 2869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN]; 2879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU]; 2889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer_ptr; 2899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 2909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Align the virtual buffers for the components used in this scan. */ 2929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 2939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 2949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer[ci] = (*cinfo->mem->access_virt_barray) 2959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index], 2969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num * compptr->v_samp_factor, 2979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) compptr->v_samp_factor, FALSE); 2989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop to process one whole iMCU row */ 3019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 3029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset++) { 3039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (MCU_col_num = coef->mcu_ctr; MCU_col_num < cinfo->MCUs_per_row; 3049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_col_num++) { 3059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Construct list of pointers to DCT blocks belonging to this MCU */ 3069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn = 0; /* index of current DCT block within MCU */ 3079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 3089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 3099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_col = MCU_col_num * compptr->MCU_width; 3109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width 3119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project : compptr->last_col_width; 3129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yindex = 0; yindex < compptr->MCU_height; yindex++) { 3139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->iMCU_row_num < last_iMCU_row || 3149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yindex+yoffset < compptr->last_row_height) { 3159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Fill in pointers to real blocks in this row */ 3169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer_ptr = buffer[ci][yindex+yoffset] + start_col; 3179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (xindex = 0; xindex < blockcnt; xindex++) 3189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_buffer[blkn++] = buffer_ptr++; 3199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 3209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* At bottom of image, need a whole row of dummy blocks */ 3219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project xindex = 0; 3229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Fill in any dummy blocks needed in this row. 3249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Dummy blocks are filled in the same way as in jccoefct.c: 3259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * all zeroes in the AC entries, DC entries equal to previous 3269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * block's DC value. The init routine has already zeroed the 3279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * AC entries, so we need only set the DC entries correctly. 3289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (; xindex < compptr->MCU_width; xindex++) { 3309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_buffer[blkn] = coef->dummy_buffer[blkn]; 3319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_buffer[blkn][0][0] = MCU_buffer[blkn-1][0][0]; 3329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn++; 3339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Try to write the MCU. */ 3379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*cinfo->entropy->encode_mcu) (cinfo, MCU_buffer)) { 3389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Suspension forced; update state counters and exit */ 3399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_vert_offset = yoffset; 3409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = MCU_col_num; 3419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 3429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed an MCU row, but perhaps not an iMCU row */ 3459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = 0; 3469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the iMCU row, advance counters for next one */ 3489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num++; 3499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 3509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 3519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 3559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize coefficient buffer controller. 3569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 3579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Each passed coefficient array must be the right size for that 3589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * coefficient: width_in_blocks wide and height_in_blocks high, 3599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * with unitheight at least v_samp_factor. 3609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 3639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttransencode_coef_controller (j_compress_ptr cinfo, 3649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jvirt_barray_ptr * coef_arrays) 3659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef; 3679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer; 3689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int i; 3699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef = (my_coef_ptr) 3719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 3729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(my_coef_controller)); 3739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->coef = (struct jpeg_c_coef_controller *) coef; 3749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.start_pass = start_pass_coef; 3759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.compress_data = compress_output; 3769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Save pointer to virtual arrays */ 3789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->whole_image = coef_arrays; 3799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Allocate and pre-zero space for dummy DCT blocks. */ 3819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (JBLOCKROW) 3829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 3839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); 3849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jzero_far((void FAR *) buffer, C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); 3859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) { 3869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->dummy_buffer[i] = buffer + i; 3879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 389