19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jccoefct.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 compression. 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This controller is the top level of the JPEG compressor proper. 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The coefficient buffer lies between forward-DCT and entropy encoding steps. 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/* We use a full-image coefficient buffer when doing Huffman optimization, 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and also for writing multiple-scan JPEG files. In all cases, the DCT 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * step is run during the first pass, and subsequent passes need only read 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the buffered coefficients. 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef ENTROPY_OPT_SUPPORTED 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define FULL_COEF_BUFFER_SUPPORTED 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef C_MULTISCAN_FILES_SUPPORTED 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define FULL_COEF_BUFFER_SUPPORTED 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Private buffer controller object */ 339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef struct { 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project struct jpeg_c_coef_controller pub; /* public fields */ 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION iMCU_row_num; /* iMCU row # within image */ 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION mcu_ctr; /* counts MCUs processed in current row */ 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int MCU_vert_offset; /* counts MCU rows within iMCU row */ 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int MCU_rows_per_iMCU_row; /* number of such rows needed */ 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* For single-pass compression, it's sufficient to buffer just one MCU 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * (although this may prove a bit slow in practice). We allocate a 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * workspace of C_MAX_BLOCKS_IN_MCU coefficient blocks, and reuse it for each 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * MCU constructed and sent. (On 80x86, the workspace is FAR even though 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * it's not really very big; this is to keep the module interfaces unchanged 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * when a large coefficient buffer is necessary.) 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In multi-pass modes, this array points to the current MCU's blocks 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * within the virtual arrays. 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU]; 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* In multi-pass modes, we need a virtual block array for each component. */ 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jvirt_barray_ptr whole_image[MAX_COMPONENTS]; 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} my_coef_controller; 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef my_coef_controller * my_coef_ptr; 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Forward declarations */ 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) compress_data 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf)); 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef FULL_COEF_BUFFER_SUPPORTED 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) compress_first_pass 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf)); 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) compress_output 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf)); 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_iMCU_row (j_compress_ptr cinfo) 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Reset within-iMCU-row counters for a new row */ 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* In an interleaved scan, an MCU row is the same as an iMCU row. 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows. 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * But at the bottom of the image, process only what's left. 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comps_in_scan > 1) { 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = 1; 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1)) 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor; 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height; 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = 0; 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_vert_offset = 0; 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize for a processing pass. 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstart_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode) 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num = 0; 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (pass_mode) { 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case JBUF_PASS_THRU: 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->whole_image[0] != NULL) 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.compress_data = compress_data; 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef FULL_COEF_BUFFER_SUPPORTED 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case JBUF_SAVE_AND_PASS: 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->whole_image[0] == NULL) 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.compress_data = compress_first_pass; 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 1199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case JBUF_CRANK_DEST: 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->whole_image[0] == NULL) 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.compress_data = compress_output; 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project default: 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Process some data in the single-pass case. 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We process the equivalent of one fully interleaved MCU row ("iMCU" row) 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * per call, ie, v_samp_factor block rows for each component in the image. 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns TRUE if the iMCU row is completed, FALSE if suspended. 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: input_buf contains a plane for each component in image, 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * which we index according to the component's SOF position. 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectcompress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf) 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION MCU_col_num; /* index of current MCU within row */ 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1; 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int blkn, bi, ci, yindex, yoffset, blockcnt; 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION ypos, xpos; 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop to write as much as one whole iMCU row */ 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset++) { 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (MCU_col_num = coef->mcu_ctr; MCU_col_num <= last_MCU_col; 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_col_num++) { 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Determine where data comes from in input_buf and do the DCT thing. 1599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Each call on forward_DCT processes a horizontal row of DCT blocks 1609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * as wide as an MCU; we rely on having allocated the MCU_buffer[] blocks 1619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * sequentially. Dummy blocks at the right or bottom edge are filled in 1629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * specially. The data in them does not matter for image reconstruction, 1639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * so we fill them with values that will encode to the smallest amount of 1649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * data, viz: all zeroes in the AC entries, DC entries equal to previous 1659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * block's DC value. (Thanks to Thomas Kinsman for this idea.) 1669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn = 0; 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project : compptr->last_col_width; 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project xpos = MCU_col_num * compptr->MCU_sample_width; 1739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ypos = yoffset * DCTSIZE; /* ypos == (yoffset+yindex) * DCTSIZE */ 1749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yindex = 0; yindex < compptr->MCU_height; yindex++) { 1759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->iMCU_row_num < last_iMCU_row || 1769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset+yindex < compptr->last_row_height) { 1779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->fdct->forward_DCT) (cinfo, compptr, 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project input_buf[compptr->component_index], 1799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_buffer[blkn], 1809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ypos, xpos, (JDIMENSION) blockcnt); 1819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (blockcnt < compptr->MCU_width) { 1829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create some dummy blocks at the right edge of the image. */ 1839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jzero_far((void FAR *) coef->MCU_buffer[blkn + blockcnt], 1849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (compptr->MCU_width - blockcnt) * SIZEOF(JBLOCK)); 1859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (bi = blockcnt; bi < compptr->MCU_width; bi++) { 1869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_buffer[blkn+bi][0][0] = coef->MCU_buffer[blkn+bi-1][0][0]; 1879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 1909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create a row of dummy blocks at the bottom of the image. */ 1919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jzero_far((void FAR *) coef->MCU_buffer[blkn], 1929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->MCU_width * SIZEOF(JBLOCK)); 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (bi = 0; bi < compptr->MCU_width; bi++) { 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_buffer[blkn+bi][0][0] = coef->MCU_buffer[blkn-1][0][0]; 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn += compptr->MCU_width; 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ypos += DCTSIZE; 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Try to write the MCU. In event of a suspension failure, we will 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * re-DCT the MCU on restart (a bit inefficient, could be fixed...) 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*cinfo->entropy->encode_mcu) (cinfo, coef->MCU_buffer)) { 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Suspension forced; update state counters and exit */ 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_vert_offset = yoffset; 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = MCU_col_num; 2089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 2099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed an MCU row, but perhaps not an iMCU row */ 2129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = 0; 2139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the iMCU row, advance counters for next one */ 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num++; 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef FULL_COEF_BUFFER_SUPPORTED 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Process some data in the first pass of a multi-pass case. 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We process the equivalent of one fully interleaved MCU row ("iMCU" row) 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * per call, ie, v_samp_factor block rows for each component in the image. 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This amount of data is read from the source buffer, DCT'd and quantized, 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and saved into the virtual arrays. We also generate suitable dummy blocks 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * as needed at the right and lower edges. (The dummy blocks are constructed 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * in the virtual arrays, which have been padded appropriately.) This makes 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * it possible for subsequent passes not to worry about real vs. dummy blocks. 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We must also emit the data to the entropy encoder. This is conveniently 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * done by calling compress_output() after we've loaded the current strip 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * of the virtual arrays. 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: input_buf contains a plane for each component in image. All 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * components are DCT'd and loaded into the virtual arrays in this pass. 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * However, it may be that only a subset of the components are emitted to 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the entropy encoder during this first pass; be careful about looking 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * at the scan-dependent variables (MCU dimensions, etc). 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectcompress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf) 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION blocks_across, MCUs_across, MCUindex; 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int bi, ci, h_samp_factor, block_row, block_rows, ndummy; 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JCOEF lastDC; 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKARRAY buffer; 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW thisblockrow, lastblockrow; 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Align the virtual buffer for this component. */ 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (*cinfo->mem->access_virt_barray) 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[ci], 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num * compptr->v_samp_factor, 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) compptr->v_samp_factor, TRUE); 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Count non-dummy DCT block rows in this iMCU row. */ 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->iMCU_row_num < last_iMCU_row) 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_rows = compptr->v_samp_factor; 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else { 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* NB: can't use last_row_height here, since may not be set! */ 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor); 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (block_rows == 0) block_rows = compptr->v_samp_factor; 2709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blocks_across = compptr->width_in_blocks; 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project h_samp_factor = compptr->h_samp_factor; 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Count number of dummy blocks to be added at the right margin. */ 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ndummy = (int) (blocks_across % h_samp_factor); 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (ndummy > 0) 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ndummy = h_samp_factor - ndummy; 2779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Perform DCT for all non-dummy blocks in this iMCU row. Each call 2789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * on forward_DCT processes a complete horizontal row of DCT blocks. 2799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (block_row = 0; block_row < block_rows; block_row++) { 2819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project thisblockrow = buffer[block_row]; 2829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->fdct->forward_DCT) (cinfo, compptr, 2839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project input_buf[ci], thisblockrow, 2849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) (block_row * DCTSIZE), 2859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) 0, blocks_across); 2869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (ndummy > 0) { 2879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create dummy blocks at the right edge of the image. */ 2889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project thisblockrow += blocks_across; /* => first dummy block */ 2899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jzero_far((void FAR *) thisblockrow, ndummy * SIZEOF(JBLOCK)); 2909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project lastDC = thisblockrow[-1][0]; 2919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (bi = 0; bi < ndummy; bi++) { 2929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project thisblockrow[bi][0] = lastDC; 2939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If at end of image, create dummy block rows as needed. 2979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The tricky part here is that within each MCU, we want the DC values 2989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * of the dummy blocks to match the last real block's DC value. 2999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This squeezes a few more bytes out of the resulting file... 3009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (coef->iMCU_row_num == last_iMCU_row) { 3029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blocks_across += ndummy; /* include lower right corner */ 3039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCUs_across = blocks_across / h_samp_factor; 3049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (block_row = block_rows; block_row < compptr->v_samp_factor; 3059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project block_row++) { 3069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project thisblockrow = buffer[block_row]; 3079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project lastblockrow = buffer[block_row-1]; 3089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jzero_far((void FAR *) thisblockrow, 3099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (size_t) (blocks_across * SIZEOF(JBLOCK))); 3109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (MCUindex = 0; MCUindex < MCUs_across; MCUindex++) { 3119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project lastDC = lastblockrow[h_samp_factor-1][0]; 3129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (bi = 0; bi < h_samp_factor; bi++) { 3139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project thisblockrow[bi][0] = lastDC; 3149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project thisblockrow += h_samp_factor; /* advance to next MCU in row */ 3169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project lastblockrow += h_samp_factor; 3179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* NB: compress_output will increment iMCU_row_num if successful. 3229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * A suspension return will result in redoing all the work above next time. 3239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Emit data to the entropy encoder, sharing code with subsequent passes */ 3269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return compress_output(cinfo, input_buf); 3279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 3319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Process some data in subsequent passes of a multi-pass case. 3329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We process the equivalent of one fully interleaved MCU row ("iMCU" row) 3339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * per call, ie, v_samp_factor block rows for each component in the scan. 3349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The data is obtained from the virtual arrays and fed to the entropy coder. 3359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns TRUE if the iMCU row is completed, FALSE if suspended. 3369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 3379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: input_buf is ignored; it is likely to be a NULL pointer. 3389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 3419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectcompress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf) 3429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef = (my_coef_ptr) cinfo->coef; 3449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION MCU_col_num; /* index of current MCU within row */ 3459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int blkn, ci, xindex, yindex, yoffset; 3469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JDIMENSION start_col; 3479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN]; 3489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer_ptr; 3499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 3509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Align the virtual buffers for the components used in this scan. 3529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: during first pass, this is safe only because the buffers will 3539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * already be aligned properly, so jmemmgr.c won't need to do any I/O. 3549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 3559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 3569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 3579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer[ci] = (*cinfo->mem->access_virt_barray) 3589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index], 3599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num * compptr->v_samp_factor, 3609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) compptr->v_samp_factor, FALSE); 3619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Loop to process one whole iMCU row */ 3649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; 3659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project yoffset++) { 3669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (MCU_col_num = coef->mcu_ctr; MCU_col_num < cinfo->MCUs_per_row; 3679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MCU_col_num++) { 3689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Construct list of pointers to DCT blocks belonging to this MCU */ 3699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project blkn = 0; /* index of current DCT block within MCU */ 3709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0; ci < cinfo->comps_in_scan; ci++) { 3719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr = cinfo->cur_comp_info[ci]; 3729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_col = MCU_col_num * compptr->MCU_width; 3739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (yindex = 0; yindex < compptr->MCU_height; yindex++) { 3749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer_ptr = buffer[ci][yindex+yoffset] + start_col; 3759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (xindex = 0; xindex < compptr->MCU_width; xindex++) { 3769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_buffer[blkn++] = buffer_ptr++; 3779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Try to write the MCU. */ 3819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*cinfo->entropy->encode_mcu) (cinfo, coef->MCU_buffer)) { 3829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Suspension forced; update state counters and exit */ 3839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_vert_offset = yoffset; 3849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = MCU_col_num; 3859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 3869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed an MCU row, but perhaps not an iMCU row */ 3899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->mcu_ctr = 0; 3909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Completed the iMCU row, advance counters for next one */ 3929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->iMCU_row_num++; 3939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project start_iMCU_row(cinfo); 3949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 3959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* FULL_COEF_BUFFER_SUPPORTED */ 3989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 4019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize coefficient buffer controller. 4029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 4039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 4059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjinit_c_coef_controller (j_compress_ptr cinfo, boolean need_full_buffer) 4069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 4079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_coef_ptr coef; 4089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef = (my_coef_ptr) 4109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 4119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(my_coef_controller)); 4129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->coef = (struct jpeg_c_coef_controller *) coef; 4139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->pub.start_pass = start_pass_coef; 4149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create the coefficient buffer. */ 4169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (need_full_buffer) { 4179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef FULL_COEF_BUFFER_SUPPORTED 4189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Allocate a full-image virtual array for each component, */ 4199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* padded to a multiple of samp_factor DCT blocks in each direction. */ 4209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int ci; 4219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info *compptr; 4229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 4249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 4259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->whole_image[ci] = (*cinfo->mem->request_virt_barray) 4269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE, 4279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) jround_up((long) compptr->width_in_blocks, 4289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) compptr->h_samp_factor), 4299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) jround_up((long) compptr->height_in_blocks, 4309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (long) compptr->v_samp_factor), 4319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (JDIMENSION) compptr->v_samp_factor); 4329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else 4349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); 4359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 4369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 4379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We only need a single-MCU buffer. */ 4389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JBLOCKROW buffer; 4399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int i; 4409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project buffer = (JBLOCKROW) 4429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 4439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); 4449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) { 4459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->MCU_buffer[i] = buffer + i; 4469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project coef->whole_image[0] = NULL; /* flag for no virtual arrays */ 4489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 450