19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jdmarker.c 39f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 49f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Copyright (C) 1991-1998, 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 routines to decode JPEG datastream markers. 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Most of the complexity arises from our desire to support input 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * suspension: if not all of the data for a marker is available, 119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * we must exit back to the application. On resumption, we reprocess 129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the marker. 139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define JPEG_INTERNALS 169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jinclude.h" 179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jpeglib.h" 189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef enum { /* JPEG marker codes */ 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF0 = 0xc0, 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF1 = 0xc1, 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF2 = 0xc2, 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF3 = 0xc3, 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF5 = 0xc5, 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF6 = 0xc6, 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF7 = 0xc7, 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_JPG = 0xc8, 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF9 = 0xc9, 329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF10 = 0xca, 339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF11 = 0xcb, 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF13 = 0xcd, 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF14 = 0xce, 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOF15 = 0xcf, 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_DHT = 0xc4, 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_DAC = 0xcc, 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST0 = 0xd0, 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST1 = 0xd1, 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST2 = 0xd2, 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST3 = 0xd3, 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST4 = 0xd4, 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST5 = 0xd5, 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST6 = 0xd6, 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_RST7 = 0xd7, 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOI = 0xd8, 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_EOI = 0xd9, 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_SOS = 0xda, 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_DQT = 0xdb, 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_DNL = 0xdc, 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_DRI = 0xdd, 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_DHP = 0xde, 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_EXP = 0xdf, 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP0 = 0xe0, 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP1 = 0xe1, 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP2 = 0xe2, 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP3 = 0xe3, 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP4 = 0xe4, 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP5 = 0xe5, 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP6 = 0xe6, 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP7 = 0xe7, 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP8 = 0xe8, 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP9 = 0xe9, 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP10 = 0xea, 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP11 = 0xeb, 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP12 = 0xec, 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP13 = 0xed, 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP14 = 0xee, 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_APP15 = 0xef, 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_JPG0 = 0xf0, 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_JPG13 = 0xfd, 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_COM = 0xfe, 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_TEM = 0x01, 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project M_ERROR = 0x100 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} JPEG_MARKER; 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Private state */ 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef struct { 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project struct jpeg_marker_reader pub; /* public fields */ 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Application-overridable marker processing methods */ 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_marker_parser_method process_COM; 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_marker_parser_method process_APPn[16]; 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Limit on marker data length to save for each marker type */ 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int length_limit_COM; 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int length_limit_APPn[16]; 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Status of COM/APPn marker saving */ 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_saved_marker_ptr cur_marker; /* NULL if not processing a marker */ 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int bytes_read; /* data bytes read so far in marker */ 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note: cur_marker is not linked into marker_list until it's all read. */ 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} my_marker_reader; 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projecttypedef my_marker_reader * my_marker_ptr; 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Macros for fetching data from the data source module. 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * At all times, cinfo->src->next_input_byte and ->bytes_in_buffer reflect 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the current restart point; we update them only when we have reached a 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * suitable place to restart if a suspension occurs. 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Declare and initialize local copies of input pointer/count */ 1199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define INPUT_VARS(cinfo) \ 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project struct jpeg_source_mgr * datasrc = (cinfo)->src; \ 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project const JOCTET * next_input_byte = datasrc->next_input_byte; \ 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project size_t bytes_in_buffer = datasrc->bytes_in_buffer 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Unload the local copies --- do this only at a restart boundary */ 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define INPUT_SYNC(cinfo) \ 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ( datasrc->next_input_byte = next_input_byte, \ 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project datasrc->bytes_in_buffer = bytes_in_buffer ) 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Reload the local copies --- used only in MAKE_BYTE_AVAIL */ 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define INPUT_RELOAD(cinfo) \ 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ( next_input_byte = datasrc->next_input_byte, \ 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_in_buffer = datasrc->bytes_in_buffer ) 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Internal macro for INPUT_BYTE and INPUT_2BYTES: make a byte available. 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note we do *not* do INPUT_SYNC before calling fill_input_buffer, 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but we must reload the local copies after a successful fill. 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define MAKE_BYTE_AVAIL(cinfo,action) \ 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (bytes_in_buffer == 0) { \ 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*datasrc->fill_input_buffer) (cinfo)) \ 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project { action; } \ 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_RELOAD(cinfo); \ 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Read a byte into variable V. 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If must suspend, take the specified action (typically "return FALSE"). 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define INPUT_BYTE(cinfo,V,action) \ 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \ 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_in_buffer--; \ 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project V = GETJOCTET(*next_input_byte++); ) 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* As above, but read two bytes interpreted as an unsigned 16-bit integer. 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * V should be declared unsigned int or perhaps INT32. 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define INPUT_2BYTES(cinfo,V,action) \ 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \ 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_in_buffer--; \ 1599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project V = ((unsigned int) GETJOCTET(*next_input_byte++)) << 8; \ 1609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAKE_BYTE_AVAIL(cinfo,action); \ 1619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_in_buffer--; \ 1629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project V += GETJOCTET(*next_input_byte++); ) 1639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Routines to process JPEG markers. 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Entry condition: JPEG marker itself has been read and its code saved 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * in cinfo->unread_marker; input restart point is just after the marker. 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Exit: if return TRUE, have read and processed any parameters, and have 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * updated the restart point to point after the parameters. 1739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If return FALSE, was forced to suspend before reaching end of 1749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * marker parameters; restart point has not been moved. Same routine 1759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * will be called again after application supplies more input data. 1769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This approach to suspension assumes that all of a marker's parameters 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * can fit into a single input bufferload. This should hold for "normal" 1799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * markers. Some COM/APPn markers might have large parameter segments 1809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * that might not fit. If we are simply dropping such a marker, we use 1819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * skip_input_data to get past it, and thereby put the problem on the 1829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * source manager's shoulders. If we are saving the marker's contents 1839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * into memory, we use a slightly different convention: when forced to 1849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * suspend, the marker processor updates the restart point to the end of 1859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * what it's consumed (ie, the end of the buffer) before returning FALSE. 1869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * On resumption, cinfo->unread_marker still contains the marker code, 1879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but the data source will point to the next chunk of marker data. 1889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The marker processor must retain internal state to deal with this. 1899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that we don't bother to avoid duplicate trace messages if a 1919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * suspension occurs within marker parameters. Other side effects 1929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * require more care. 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_soi (j_decompress_ptr cinfo) 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process an SOI marker */ 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int i; 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS(cinfo, 1, JTRC_SOI); 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->marker->saw_SOI) 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_SOI_DUPLICATE); 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reset all parameters that are defined to be reset by SOI */ 2089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < NUM_ARITH_TBLS; i++) { 2109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_dc_L[i] = 0; 2119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_dc_U[i] = 1; 2129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_ac_K[i] = 5; 2139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->restart_interval = 0; 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Set initial assumptions for colorspace etc */ 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->jpeg_color_space = JCS_UNKNOWN; 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->CCIR601_sampling = FALSE; /* Assume non-CCIR sampling??? */ 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->saw_JFIF_marker = FALSE; 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->JFIF_major_version = 1; /* set default JFIF APP0 values */ 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->JFIF_minor_version = 1; 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->density_unit = 0; 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->X_density = 1; 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Y_density = 1; 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->saw_Adobe_marker = FALSE; 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Adobe_transform = 0; 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->saw_SOI = TRUE; 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith) 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process a SOFn marker */ 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c, ci; 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info * compptr; 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->progressive_mode = is_prog; 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_code = is_arith; 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, cinfo->data_precision, return FALSE); 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, cinfo->image_height, return FALSE); 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, cinfo->image_width, return FALSE); 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, cinfo->num_components, return FALSE); 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 8; 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS4(cinfo, 1, JTRC_SOF, cinfo->unread_marker, 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (int) cinfo->image_width, (int) cinfo->image_height, 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->num_components); 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->marker->saw_SOF) 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_SOF_DUPLICATE); 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We don't support files in which the image height is initially specified */ 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* as 0 and is later redefined by DNL. As long as we have to check that, */ 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* might as well have a general sanity check. */ 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->image_height <= 0 || cinfo->image_width <= 0 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project || cinfo->num_components <= 0) 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_EMPTY_IMAGE); 2709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length != (cinfo->num_components * 3)) 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_LENGTH); 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->comp_info == NULL) /* do only once, even if suspend */ 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->comp_info = (jpeg_component_info *) (*cinfo->mem->alloc_small) 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((j_common_ptr) cinfo, JPOOL_IMAGE, 2779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->num_components * SIZEOF(jpeg_component_info)); 2789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 2809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 2819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->component_index = ci; 2829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, compptr->component_id, return FALSE); 2839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 2849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->h_samp_factor = (c >> 4) & 15; 2859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->v_samp_factor = (c ) & 15; 2869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, compptr->quant_tbl_no, return FALSE); 2879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS4(cinfo, 1, JTRC_SOF_COMPONENT, 2899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->component_id, compptr->h_samp_factor, 2909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->v_samp_factor, compptr->quant_tbl_no); 2919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->saw_SOF = TRUE; 2949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 2969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 2979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 3019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_sos (j_decompress_ptr cinfo) 3029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process a SOS marker */ 3039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 3050061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich int i, ci, n, c, cc, pi; 3069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_component_info * compptr; 3079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 3089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! cinfo->marker->saw_SOF) 3109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_SOS_NO_SOF); 3119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 3139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, n, return FALSE); /* Number of components */ 3159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_SOS, n); 3179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length != (n * 2 + 6) || n < 1 || n > MAX_COMPS_IN_SCAN) 3199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_LENGTH); 3209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->comps_in_scan = n; 3229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Collect the component-spec parameters */ 3249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < n; i++) { 3269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, cc, return FALSE); 3279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 3289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 3309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ci++, compptr++) { 3319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cc == compptr->component_id) 3329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project goto id_found; 3339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc); 3369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project id_found: 3389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->cur_comp_info[i] = compptr; 3409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->dc_tbl_no = (c >> 4) & 15; 3419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->ac_tbl_no = (c ) & 15; 3429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS3(cinfo, 1, JTRC_SOS_COMPONENT, cc, 3449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project compptr->dc_tbl_no, compptr->ac_tbl_no); 3450061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich 3460061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich /* This CSi (cc) should differ from the previous CSi */ 3470061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich for (pi = 0; pi < i; pi++) { 3480061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich if (cinfo->cur_comp_info[pi] == compptr) 3490061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc); 3500061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich } 3519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 3529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Collect the additional scan parameters Ss, Se, Ah/Al. */ 3549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 3559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Ss = c; 3569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 3579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Se = c; 3589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 3599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Ah = (c >> 4) & 15; 3609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Al = (c ) & 15; 3619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS4(cinfo, 1, JTRC_SOS_PARAMS, cinfo->Ss, cinfo->Se, 3639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Ah, cinfo->Al); 3649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Prepare to scan data & restart markers */ 3669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->next_restart_num = 0; 3679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Count another SOS marker */ 3699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->input_scan_number++; 3709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 3729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 3739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 3749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef D_ARITH_CODING_SUPPORTED 3779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 3799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_dac (j_decompress_ptr cinfo) 3809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process a DAC marker */ 3819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 3829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 3839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int index, val; 3849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 3859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 3879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 3889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (length > 0) { 3909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, index, return FALSE); 3919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, val, return FALSE); 3929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 3949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 1, JTRC_DAC, index, val); 3969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 3979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (index < 0 || index >= (2*NUM_ARITH_TBLS)) 3989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_DAC_INDEX, index); 3999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (index >= NUM_ARITH_TBLS) { /* define AC table */ 4019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_ac_K[index-NUM_ARITH_TBLS] = (UINT8) val; 4029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { /* define DC table */ 4039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_dc_L[index] = (UINT8) (val & 0x0F); 4049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->arith_dc_U[index] = (UINT8) (val >> 4); 4059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->arith_dc_L[index] > cinfo->arith_dc_U[index]) 4069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_DAC_VALUE, val); 4079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length != 0) 4119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_LENGTH); 4129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 4149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 4159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 4169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#else /* ! D_ARITH_CODING_SUPPORTED */ 4189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define get_dac(cinfo) skip_variable(cinfo) 4209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* D_ARITH_CODING_SUPPORTED */ 4229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 4259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_dht (j_decompress_ptr cinfo) 4269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process a DHT marker */ 4279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 4289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 4299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project UINT8 bits[17]; 4309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project UINT8 huffval[256]; 4319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int i, index, count; 4329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JHUFF_TBL **htblptr; 4339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 4349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 4369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 4379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (length > 16) { 4399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, index, return FALSE); 4409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_DHT, index); 4429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bits[0] = 0; 4449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project count = 0; 4459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 1; i <= 16; i++) { 4469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, bits[i], return FALSE); 4479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project count += bits[i]; 4489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 1 + 16; 4519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS8(cinfo, 2, JTRC_HUFFBITS, 4539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bits[1], bits[2], bits[3], bits[4], 4549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bits[5], bits[6], bits[7], bits[8]); 4559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS8(cinfo, 2, JTRC_HUFFBITS, 4569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bits[9], bits[10], bits[11], bits[12], 4579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bits[13], bits[14], bits[15], bits[16]); 4589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Here we just do minimal validation of the counts to avoid walking 4609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * off the end of our table space. jdhuff.c will check more carefully. 4619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 4629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (count > 256 || ((INT32) count) > length) 4639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_HUFF_TABLE); 4649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < count; i++) 4669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, huffval[i], return FALSE); 4670061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich 4680061f897d4f6217475bbb4bb63fcbd7f8f4af3e5Nick Kralevich MEMZERO(&huffval[count], (256 - count) * SIZEOF(UINT8)); 4699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= count; 4719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (index & 0x10) { /* AC table definition */ 4739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project index -= 0x10; 4749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project htblptr = &cinfo->ac_huff_tbl_ptrs[index]; 4759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { /* DC table definition */ 4769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project htblptr = &cinfo->dc_huff_tbl_ptrs[index]; 4779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (index < 0 || index >= NUM_HUFF_TBLS) 4809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_DHT_INDEX, index); 4819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (*htblptr == NULL) 4839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo); 4849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits)); 4869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MEMCOPY((*htblptr)->huffval, huffval, SIZEOF((*htblptr)->huffval)); 4879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 4889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length != 0) 4909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_LENGTH); 4919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 4939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 4949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 4959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 4979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 4989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_dqt (j_decompress_ptr cinfo) 4999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process a DQT marker */ 5009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 5019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 5029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int n, i, prec; 5039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int tmp; 5049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JQUANT_TBL *quant_ptr; 5059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 5069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 5089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 5099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (length > 0) { 5119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, n, return FALSE); 5129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project prec = n >> 4; 5139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project n &= 0x0F; 5149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 1, JTRC_DQT, n, prec); 5169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (n >= NUM_QUANT_TBLS) 5189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_DQT_INDEX, n); 5199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->quant_tbl_ptrs[n] == NULL) 5219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->quant_tbl_ptrs[n] = jpeg_alloc_quant_table((j_common_ptr) cinfo); 5229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quant_ptr = cinfo->quant_tbl_ptrs[n]; 5239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < DCTSIZE2; i++) { 5259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (prec) 5269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, tmp, return FALSE); 5279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 5289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, tmp, return FALSE); 5299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* We convert the zigzag-order table to natural array order. */ 5309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quant_ptr->quantval[jpeg_natural_order[i]] = (UINT16) tmp; 5319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->err->trace_level >= 2) { 5349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < DCTSIZE2; i += 8) { 5359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS8(cinfo, 2, JTRC_QUANTVALS, 5369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quant_ptr->quantval[i], quant_ptr->quantval[i+1], 5379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quant_ptr->quantval[i+2], quant_ptr->quantval[i+3], 5389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quant_ptr->quantval[i+4], quant_ptr->quantval[i+5], 5399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project quant_ptr->quantval[i+6], quant_ptr->quantval[i+7]); 5409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= DCTSIZE2+1; 5449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (prec) length -= DCTSIZE2; 5459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 5469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length != 0) 5489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_LENGTH); 5499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 5519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 5529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 5539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 5569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_dri (j_decompress_ptr cinfo) 5579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process a DRI marker */ 5589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 5599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 5609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int tmp; 5619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 5629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 5649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length != 4) 5669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_BAD_LENGTH); 5679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, tmp, return FALSE); 5699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_DRI, tmp); 5719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->restart_interval = tmp; 5739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 5759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 5769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 5779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 5809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Routines for processing APPn and COM markers. 5819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * These are either saved in memory or discarded, per application request. 5829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * APP0 and APP14 are specially checked to see if they are 5839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * JFIF and Adobe markers, respectively. 5849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 5859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define APP0_DATA_LEN 14 /* Length of interesting data in APP0 */ 5879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define APP14_DATA_LEN 12 /* Length of interesting data in APP14 */ 5889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define APPN_DATA_LEN 14 /* Must be the largest of the above!! */ 5899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 5919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 5929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectexamine_app0 (j_decompress_ptr cinfo, JOCTET FAR * data, 5939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int datalen, INT32 remaining) 5949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Examine first few bytes from an APP0. 5959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Take appropriate action if it is a JFIF marker. 5969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * datalen is # of bytes at data[], remaining is length of rest of marker data. 5979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 5989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 5999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 totallen = (INT32) datalen + remaining; 6009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (datalen >= APP0_DATA_LEN && 6029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[0]) == 0x4A && 6039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[1]) == 0x46 && 6049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[2]) == 0x49 && 6059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[3]) == 0x46 && 6069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[4]) == 0) { 6079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Found JFIF APP0 marker: save info */ 6089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->saw_JFIF_marker = TRUE; 6099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->JFIF_major_version = GETJOCTET(data[5]); 6109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->JFIF_minor_version = GETJOCTET(data[6]); 6119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->density_unit = GETJOCTET(data[7]); 6129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->X_density = (GETJOCTET(data[8]) << 8) + GETJOCTET(data[9]); 6139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Y_density = (GETJOCTET(data[10]) << 8) + GETJOCTET(data[11]); 6149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Check version. 6159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Major version must be 1, anything else signals an incompatible change. 6169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * (We used to treat this as an error, but now it's a nonfatal warning, 6179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * because some bozo at Hijaak couldn't read the spec.) 6189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Minor version should be 0..2, but process anyway if newer. 6199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 6209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->JFIF_major_version != 1) 6219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project WARNMS2(cinfo, JWRN_JFIF_MAJOR, 6229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->JFIF_major_version, cinfo->JFIF_minor_version); 6239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Generate trace messages */ 6249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS5(cinfo, 1, JTRC_JFIF, 6259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->JFIF_major_version, cinfo->JFIF_minor_version, 6269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->X_density, cinfo->Y_density, cinfo->density_unit); 6279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Validate thumbnail dimensions and issue appropriate messages */ 6289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (GETJOCTET(data[12]) | GETJOCTET(data[13])) 6299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL, 6309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[12]), GETJOCTET(data[13])); 6319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project totallen -= APP0_DATA_LEN; 6329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (totallen != 6339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((INT32)GETJOCTET(data[12]) * (INT32)GETJOCTET(data[13]) * (INT32) 3)) 6349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int) totallen); 6359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else if (datalen >= 6 && 6369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[0]) == 0x4A && 6379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[1]) == 0x46 && 6389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[2]) == 0x58 && 6399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[3]) == 0x58 && 6409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[4]) == 0) { 6419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Found JFIF "JFXX" extension APP0 marker */ 6429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* The library doesn't actually do anything with these, 6439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but we try to produce a helpful trace message. 6449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 6459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (GETJOCTET(data[5])) { 6469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case 0x10: 6479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_THUMB_JPEG, (int) totallen); 6489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 6499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case 0x11: 6509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_THUMB_PALETTE, (int) totallen); 6519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 6529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case 0x13: 6539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_THUMB_RGB, (int) totallen); 6549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 6559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project default: 6569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION, 6579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[5]), (int) totallen); 6589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 6599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 6609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 6619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Start of APP0 does not match "JFIF" or "JFXX", or too short */ 6629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_APP0, (int) totallen); 6639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 6649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 6659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(void) 6689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectexamine_app14 (j_decompress_ptr cinfo, JOCTET FAR * data, 6699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int datalen, INT32 remaining) 6709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Examine first few bytes from an APP14. 6719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Take appropriate action if it is an Adobe marker. 6729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * datalen is # of bytes at data[], remaining is length of rest of marker data. 6739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 6749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 6759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int version, flags0, flags1, transform; 6769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (datalen >= APP14_DATA_LEN && 6789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[0]) == 0x41 && 6799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[1]) == 0x64 && 6809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[2]) == 0x6F && 6819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[3]) == 0x62 && 6829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project GETJOCTET(data[4]) == 0x65) { 6839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Found Adobe APP14 marker */ 6849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project version = (GETJOCTET(data[5]) << 8) + GETJOCTET(data[6]); 6859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project flags0 = (GETJOCTET(data[7]) << 8) + GETJOCTET(data[8]); 6869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project flags1 = (GETJOCTET(data[9]) << 8) + GETJOCTET(data[10]); 6879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project transform = GETJOCTET(data[11]); 6889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform); 6899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->saw_Adobe_marker = TRUE; 6909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->Adobe_transform = (UINT8) transform; 6919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 6929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Start of APP14 does not match "Adobe", or too short */ 6939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_APP14, (int) (datalen + remaining)); 6949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 6959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 6969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 6989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 6999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectget_interesting_appn (j_decompress_ptr cinfo) 7009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Process an APP0 or APP14 marker without saving it */ 7019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 7029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 7039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JOCTET b[APPN_DATA_LEN]; 7049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int i, numtoread; 7059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 7069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 7089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 7099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* get the interesting part of the marker data */ 7119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length >= APPN_DATA_LEN) 7129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project numtoread = APPN_DATA_LEN; 7139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else if (length > 0) 7149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project numtoread = (unsigned int) length; 7159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 7169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project numtoread = 0; 7179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < numtoread; i++) 7189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, b[i], return FALSE); 7199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= numtoread; 7209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* process it */ 7229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (cinfo->unread_marker) { 7239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP0: 7249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project examine_app0(cinfo, (JOCTET FAR *) b, numtoread, length); 7259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 7269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP14: 7279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project examine_app14(cinfo, (JOCTET FAR *) b, numtoread, length); 7289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 7299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project default: 7309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* can't get here unless jpeg_save_markers chooses wrong processor */ 7319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker); 7329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 7339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* skip any remaining data -- could be lots */ 7369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 7379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length > 0) 7389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->src->skip_input_data) (cinfo, (long) length); 7399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 7419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 7429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef SAVE_MARKERS_SUPPORTED 7459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 7479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectsave_marker (j_decompress_ptr cinfo) 7489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Save an APPn or COM marker into the marker list */ 7499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 7509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 7519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_saved_marker_ptr cur_marker = marker->cur_marker; 7529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int bytes_read, data_length; 7539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project JOCTET FAR * data; 7549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length = 0; 7559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 7569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cur_marker == NULL) { 7589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* begin reading a marker */ 7599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 7609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 7619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length >= 0) { /* watch out for bogus length word */ 7629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* figure out how much we want to save */ 7639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int limit; 7649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->unread_marker == (int) M_COM) 7659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project limit = marker->length_limit_COM; 7669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 7679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project limit = marker->length_limit_APPn[cinfo->unread_marker - (int) M_APP0]; 7689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ((unsigned int) length < limit) 7699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project limit = (unsigned int) length; 7709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* allocate and initialize the marker item */ 7719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cur_marker = (jpeg_saved_marker_ptr) 7729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 7739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(struct jpeg_marker_struct) + limit); 7749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cur_marker->next = NULL; 7759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cur_marker->marker = (UINT8) cinfo->unread_marker; 7769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cur_marker->original_length = (unsigned int) length; 7779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cur_marker->data_length = limit; 7789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* data area is just beyond the jpeg_marker_struct */ 7799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project data = cur_marker->data = (JOCTET FAR *) (cur_marker + 1); 7809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->cur_marker = cur_marker; 7819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->bytes_read = 0; 7829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_read = 0; 7839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project data_length = limit; 7849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 7859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* deal with bogus length word */ 7869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_read = data_length = 0; 7879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project data = NULL; 7889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 7909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* resume reading a marker */ 7919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_read = marker->bytes_read; 7929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project data_length = cur_marker->data_length; 7939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project data = cur_marker->data + bytes_read; 7949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 7959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 7969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (bytes_read < data_length) { 7979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); /* move the restart point to here */ 7989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->bytes_read = bytes_read; 7999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If there's not at least one byte in buffer, suspend */ 8009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project MAKE_BYTE_AVAIL(cinfo, return FALSE); 8019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Copy bytes with reasonable rapidity */ 8029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (bytes_read < data_length && bytes_in_buffer > 0) { 8039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project *data++ = *next_input_byte++; 8049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_in_buffer--; 8059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project bytes_read++; 8069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Done reading what we want to read */ 8109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cur_marker != NULL) { /* will be NULL if bogus length word */ 8119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Add new marker to end of list */ 8129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->marker_list == NULL) { 8139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker_list = cur_marker; 8149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 8159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_saved_marker_ptr prev = cinfo->marker_list; 8169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (prev->next != NULL) 8179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project prev = prev->next; 8189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project prev->next = cur_marker; 8199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reset pointer & calc remaining data length */ 8219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project data = cur_marker->data; 8229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length = cur_marker->original_length - data_length; 8239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reset to initial state for next marker */ 8259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->cur_marker = NULL; 8269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Process the marker if interesting; else just make a generic trace msg */ 8289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (cinfo->unread_marker) { 8299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP0: 8309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project examine_app0(cinfo, data, data_length, length); 8319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 8329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP14: 8339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project examine_app14(cinfo, data, data_length, length); 8349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 8359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project default: 8369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, 8379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (int) (data_length + length)); 8389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 8399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* skip any remaining data -- could be lots */ 8429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); /* do before skip_input_data */ 8439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length > 0) 8449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->src->skip_input_data) (cinfo, (long) length); 8459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 8479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 8489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* SAVE_MARKERS_SUPPORTED */ 8509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 8539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectskip_variable (j_decompress_ptr cinfo) 8549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Skip over an unknown or uninteresting variable-length marker */ 8559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 8569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INT32 length; 8579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 8589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_2BYTES(cinfo, length, return FALSE); 8609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length -= 2; 8619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, (int) length); 8639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); /* do before skip_input_data */ 8659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length > 0) 8669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->src->skip_input_data) (cinfo, (long) length); 8679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 8699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 8709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 8739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Find the next JPEG marker, save it in cinfo->unread_marker. 8749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns FALSE if had to suspend before reaching a marker; 8759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * in that case cinfo->unread_marker is unchanged. 8769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 8779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that the result might not be a valid marker code, 8789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but it will never be 0 or FF. 8799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 8809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 8829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectnext_marker (j_decompress_ptr cinfo) 8839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 8849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c; 8859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 8869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 8879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (;;) { 8889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 8899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Skip any non-FF bytes. 8909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This may look a bit inefficient, but it will not occur in a valid file. 8919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We sync after each discarded byte so that a suspending data source 8929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * can discard the byte from its buffer. 8939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 8949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project while (c != 0xFF) { 8959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->discarded_bytes++; 8969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 8979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 8989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 8999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* This loop swallows any duplicate FF bytes. Extra FFs are legal as 9009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * pad bytes, so don't count them in discarded_bytes. We assume there 9019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * will not be so many consecutive FF bytes as to overflow a suspending 9029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * data source's input buffer. 9039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 9049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project do { 9059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 9069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } while (c == 0xFF); 9079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c != 0) 9089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; /* found a valid marker, exit loop */ 9099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reach here if we found a stuffed-zero data sequence (FF/00). 9109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Discard it and loop back to try again. 9119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 9129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->discarded_bytes += 2; 9139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 9149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->marker->discarded_bytes != 0) { 9179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project WARNMS2(cinfo, JWRN_EXTRANEOUS_DATA, cinfo->marker->discarded_bytes, c); 9189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->discarded_bytes = 0; 9199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = c; 9229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 9249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 9259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 9269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectLOCAL(boolean) 9299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectfirst_marker (j_decompress_ptr cinfo) 9309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* Like next_marker, but used to obtain the initial SOI marker. */ 9319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* For this marker, we do not allow preceding garbage or fill; otherwise, 9329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * we might well scan an entire input file before realizing it ain't JPEG. 9339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If an application wants to process non-JFIF files, it must seek to the 9349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * SOI before calling the JPEG library. 9359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 9369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 9379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int c, c2; 9389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_VARS(cinfo); 9399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c, return FALSE); 9419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_BYTE(cinfo, c2, return FALSE); 9429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (c != 0xFF || c2 != (int) M_SOI) 9439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT2(cinfo, JERR_NO_SOI, c, c2); 9449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = c2; 9469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project INPUT_SYNC(cinfo); 9489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 9499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 9509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 9539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Read markers until SOS or EOI. 9549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 9559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns same codes as are defined for jpeg_consume_input: 9569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI. 9579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 9589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(int) 9609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectread_markers (j_decompress_ptr cinfo) 9619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 9629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Outer loop repeats once for each marker. */ 9639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (;;) { 9649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Collect the marker proper, unless we already did. */ 9659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* NB: first_marker() enforces the requirement that SOI appear first. */ 9669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->unread_marker == 0) { 9679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! cinfo->marker->saw_SOI) { 9689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! first_marker(cinfo)) 9699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 9709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 9719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! next_marker(cinfo)) 9729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 9739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 9749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 975f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 976f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen /* 977f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * Save the position of the fist marker after SOF. 978f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 979f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (cinfo->marker->current_sos_marker_position == -1) 980f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->marker->current_sos_marker_position = 981f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jget_input_stream_position(cinfo) - 2; 982f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 9839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* At this point cinfo->unread_marker contains the marker code and the 9849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * input point is just past the marker proper, but before any parameters. 9859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * A suspension will cause us to return with this state still true. 9869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 9879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (cinfo->unread_marker) { 9889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOI: 9899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_soi(cinfo)) 9909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 9919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 9929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF0: /* Baseline */ 9949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF1: /* Extended sequential, Huffman */ 9959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_sof(cinfo, FALSE, FALSE)) 9969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 9979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 9989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 9999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF2: /* Progressive, Huffman */ 1000f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->marker->current_sos_marker_position = -1; 10019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_sof(cinfo, TRUE, FALSE)) 10029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF9: /* Extended sequential, arithmetic */ 10069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_sof(cinfo, FALSE, TRUE)) 10079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF10: /* Progressive, arithmetic */ 10119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_sof(cinfo, TRUE, TRUE)) 10129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Currently unsupported SOFn types */ 10169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF3: /* Lossless, Huffman */ 10179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF5: /* Differential sequential, Huffman */ 10189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF6: /* Differential progressive, Huffman */ 10199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF7: /* Differential lossless, Huffman */ 10209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_JPG: /* Reserved for JPEG extensions */ 10219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF11: /* Lossless, arithmetic */ 10229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF13: /* Differential sequential, arithmetic */ 10239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF14: /* Differential progressive, arithmetic */ 10249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOF15: /* Differential lossless, arithmetic */ 10259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_SOF_UNSUPPORTED, cinfo->unread_marker); 10269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_SOS: 10299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_sos(cinfo)) 10309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = 0; /* processed the marker */ 10329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_REACHED_SOS; 10339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_EOI: 10359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS(cinfo, 1, JTRC_EOI); 10369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = 0; /* processed the marker */ 10379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_REACHED_EOI; 10389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_DAC: 10409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_dac(cinfo)) 10419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_DHT: 10459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_dht(cinfo)) 10469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_DQT: 10509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_dqt(cinfo)) 10519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_DRI: 10559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! get_dri(cinfo)) 10569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP0: 10609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP1: 10619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP2: 10629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP3: 10639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP4: 10649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP5: 10659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP6: 10669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP7: 10679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP8: 10689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP9: 10699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP10: 10709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP11: 10719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP12: 10729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP13: 10739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP14: 10749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_APP15: 10759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*((my_marker_ptr) cinfo->marker)->process_APPn[ 10769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker - (int) M_APP0]) (cinfo)) 10779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_COM: 10819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*((my_marker_ptr) cinfo->marker)->process_COM) (cinfo)) 10829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 10839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST0: /* these are all parameterless */ 10869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST1: 10879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST2: 10889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST3: 10899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST4: 10909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST5: 10919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST6: 10929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_RST7: 10939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_TEM: 10949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 1, JTRC_PARMLESS_MARKER, cinfo->unread_marker); 10959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 10969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 10979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case M_DNL: /* Ignore DNL ... perhaps the wrong thing */ 10989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! skip_variable(cinfo)) 10999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return JPEG_SUSPENDED; 11009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 11019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project default: /* must be DHP, EXP, JPGn, or RESn */ 11039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* For now, we treat the reserved markers as fatal errors since they are 11049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * likely to be used to signal incompatible JPEG Part 3 extensions. 11059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Once the JPEG 3 version-number marker is well defined, this code 11069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * ought to change! 11079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 11089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker); 11099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 11109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 11119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Successfully processed marker, so reset state variable */ 11129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = 0; 11139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } /* end loop */ 11149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 11159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 11189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Read a restart marker, which is expected to appear next in the datastream; 11199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * if the marker is not there, take appropriate recovery action. 11209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns FALSE if suspension is required. 11219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 11229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This is called by the entropy decoder after it has read an appropriate 11239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * number of MCUs. cinfo->unread_marker may be nonzero if the entropy decoder 11249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * has already read a marker from the data source. Under normal conditions 11259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * cinfo->unread_marker will be reset to 0 before returning; if not reset, 11269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * it holds a marker which the decoder will be unable to read past. 11279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 11289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(boolean) 11309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectread_restart_marker (j_decompress_ptr cinfo) 11319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 11329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Obtain a marker unless we already did. */ 11339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Note that next_marker will complain if it skips any data. */ 11349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->unread_marker == 0) { 11359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! next_marker(cinfo)) 11369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 11379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 11389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (cinfo->unread_marker == 11409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ((int) M_RST0 + cinfo->marker->next_restart_num)) { 11419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Normal case --- swallow the marker and let entropy decoder continue */ 11429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS1(cinfo, 3, JTRC_RST, cinfo->marker->next_restart_num); 11439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = 0; 11449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 11459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Uh-oh, the restart markers have been messed up. */ 11469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Let the data source manager determine how to resync. */ 11479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! (*cinfo->src->resync_to_restart) (cinfo, 11489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->next_restart_num)) 11499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 11509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 11519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Update next-restart state */ 11539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker->next_restart_num = (cinfo->marker->next_restart_num + 1) & 7; 11549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 11569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 11579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 11599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 11609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This is the default resync_to_restart method for data source managers 11619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * to use if they don't have any better approach. Some data source managers 11629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * may be able to back up, or may have additional knowledge about the data 11639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * which permits a more intelligent recovery strategy; such managers would 11649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * presumably supply their own resync method. 11659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 11669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * read_restart_marker calls resync_to_restart if it finds a marker other than 11679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the restart marker it was expecting. (This code is *not* used unless 11689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * a nonzero restart interval has been declared.) cinfo->unread_marker is 11699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the marker code actually found (might be anything, except 0 or FF). 11709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * The desired restart marker number (0..7) is passed as a parameter. 11719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This routine is supposed to apply whatever error recovery strategy seems 11729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * appropriate in order to position the input stream to the next data segment. 11739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that cinfo->unread_marker is treated as a marker appearing before 11749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the current data-source input point; usually it should be reset to zero 11759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * before returning. 11769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Returns FALSE if suspension is required. 11779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 11789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This implementation is substantially constrained by wanting to treat the 11799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * input as a data stream; this means we can't back up. Therefore, we have 11809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * only the following actions to work with: 11819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 1. Simply discard the marker and let the entropy decoder resume at next 11829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * byte of file. 11839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2. Read forward until we find another marker, discarding intervening 11849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * data. (In theory we could look ahead within the current bufferload, 11859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * without having to discard data if we don't find the desired marker. 11869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This idea is not implemented here, in part because it makes behavior 11879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * dependent on buffer size and chance buffer-boundary positions.) 11889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 3. Leave the marker unread (by failing to zero cinfo->unread_marker). 11899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This will cause the entropy decoder to process an empty data segment, 11909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * inserting dummy zeroes, and then we will reprocess the marker. 11919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 11929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * #2 is appropriate if we think the desired marker lies ahead, while #3 is 11939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * appropriate if the found marker is a future restart marker (indicating 11949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * that we have missed the desired restart marker, probably because it got 11959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * corrupted). 11969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We apply #2 or #3 if the found marker is a restart marker no more than 11979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * two counts behind or ahead of the expected one. We also apply #2 if the 11989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * found marker is not a legal JPEG marker code (it's certainly bogus data). 11999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If the found marker is a restart marker more than 2 counts away, we do #1 12009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * (too much risk that the marker is erroneous; with luck we will be able to 12019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * resync at some future point). 12029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * For any valid non-restart JPEG marker, we apply #3. This keeps us from 12039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * overrunning the end of a scan. An implementation limited to single-scan 12049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * files might find it better to apply #2 for markers other than EOI, since 12059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * any other marker would have to be bogus data in that case. 12069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 12079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(boolean) 12099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_resync_to_restart (j_decompress_ptr cinfo, int desired) 12109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 12119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int marker = cinfo->unread_marker; 12129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int action = 1; 12139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Always put up a warning. */ 12159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project WARNMS2(cinfo, JWRN_MUST_RESYNC, marker, desired); 12169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Outer loop handles repeated decision after scanning forward. */ 12189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (;;) { 12199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (marker < (int) M_SOF0) 12209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project action = 2; /* invalid marker */ 12219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else if (marker < (int) M_RST0 || marker > (int) M_RST7) 12229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project action = 3; /* valid non-restart marker */ 12239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else { 12249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (marker == ((int) M_RST0 + ((desired+1) & 7)) || 12259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker == ((int) M_RST0 + ((desired+2) & 7))) 12269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project action = 3; /* one of the next two expected restarts */ 12279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else if (marker == ((int) M_RST0 + ((desired-1) & 7)) || 12289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker == ((int) M_RST0 + ((desired-2) & 7))) 12299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project action = 2; /* a prior restart, so advance */ 12309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 12319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project action = 1; /* desired restart or too far away */ 12329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 12339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMS2(cinfo, 4, JTRC_RECOVERY_ACTION, marker, action); 12349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project switch (action) { 12359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case 1: 12369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Discard marker and let entropy decoder resume processing. */ 12379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = 0; 12389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 12399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case 2: 12409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Scan to the next marker, and repeat the decision loop. */ 12419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (! next_marker(cinfo)) 12429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FALSE; 12439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker = cinfo->unread_marker; 12449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 12459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project case 3: 12469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Return without advancing past this marker. */ 12479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Entropy decoder will be forced to process an empty segment. */ 12489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return TRUE; 12499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 12509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } /* end loop */ 12519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 12529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1253f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen/* 1254f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen * Get the position for all SOS markers in the image. 1255f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen */ 1256f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 1257f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph WenMETHODDEF(void) 1258f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wenget_sos_marker_position(j_decompress_ptr cinfo, huffman_index *index) 1259f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen{ 1260f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen unsigned char *head; 1261f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int count = 0; 1262f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen int retcode = JPEG_REACHED_SOS; 1263f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen 1264f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen while (cinfo->src->bytes_in_buffer > 0) { 1265f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen if (retcode == JPEG_REACHED_SOS) { 1266f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jpeg_configure_huffman_index_scan(cinfo, index, count++, 1267f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->marker->current_sos_marker_position); 1268f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen // Skips scan content to the next non-RST JPEG marker. 1269f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen while(next_marker(cinfo) && 1270f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->unread_marker >= M_RST0 && cinfo->unread_marker <= M_RST7) 1271f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen ; 1272f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen cinfo->marker->current_sos_marker_position = 1273f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen jget_input_stream_position(cinfo) - 2; 1274f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen retcode = read_markers(cinfo); 1275f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } else { 1276f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen break; 1277f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 1278f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen } 1279f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen} 12809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 12829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Reset marker processing state to begin a fresh datastream. 12839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 12849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 12869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectreset_marker_reader (j_decompress_ptr cinfo) 12879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 12889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 12899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->comp_info = NULL; /* until allocated by get_sof */ 12919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->input_scan_number = 0; /* no SOS seen yet */ 12929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->unread_marker = 0; /* no pending marker */ 12939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->pub.saw_SOI = FALSE; /* set internal state too */ 12949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->pub.saw_SOF = FALSE; 12959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->pub.discarded_bytes = 0; 12969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->cur_marker = NULL; 12979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 12989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 12999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 13019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initialize the marker reader module. 13029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This is called only once, when the decompression object is created. 13039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 13049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 13069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjinit_marker_reader (j_decompress_ptr cinfo) 13079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 13089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_marker_ptr marker; 13099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project int i; 13109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Create subobject in permanent pool */ 13129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker = (my_marker_ptr) 13139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, 13149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project SIZEOF(my_marker_reader)); 13159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project cinfo->marker = (struct jpeg_marker_reader *) marker; 13169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Initialize public method pointers */ 13179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->pub.reset_marker_reader = reset_marker_reader; 13189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->pub.read_markers = read_markers; 13199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->pub.read_restart_marker = read_restart_marker; 1320f5b94eebe742df1a9bb3941fc0a0ec0137e936efJoseph Wen marker->pub.get_sos_marker_position = get_sos_marker_position; 1321d4fad7f50f79626455d88523207e05b868819cd8Wei-Ta Chen 1322d4fad7f50f79626455d88523207e05b868819cd8Wei-Ta Chen // Initialize the SOS marker position to avoid underdefined behavior due to 1323d4fad7f50f79626455d88523207e05b868819cd8Wei-Ta Chen // using a undefined field. 1324d4fad7f50f79626455d88523207e05b868819cd8Wei-Ta Chen marker->pub.current_sos_marker_position = 0; 1325d4fad7f50f79626455d88523207e05b868819cd8Wei-Ta Chen 13269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Initialize COM/APPn processing. 13279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * By default, we examine and then discard APP0 and APP14, 13289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * but simply discard COM and all other APPn. 13299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 13309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_COM = skip_variable; 13319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->length_limit_COM = 0; 13329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (i = 0; i < 16; i++) { 13339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_APPn[i] = skip_variable; 13349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->length_limit_APPn[i] = 0; 13359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 13369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_APPn[0] = get_interesting_appn; 13379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_APPn[14] = get_interesting_appn; 13389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Reset marker processing state */ 13399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project reset_marker_reader(cinfo); 13409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 13419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 13449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Control saving of COM and APPn markers into marker_list. 13459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 13469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifdef SAVE_MARKERS_SUPPORTED 13489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 13509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_save_markers (j_decompress_ptr cinfo, int marker_code, 13519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project unsigned int length_limit) 13529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 13539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 13549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long maxlength; 13559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_marker_parser_method processor; 13569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Length limit mustn't be larger than what we can allocate 13589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * (should only be a concern in a 16-bit environment). 13599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 13609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project maxlength = cinfo->mem->max_alloc_chunk - SIZEOF(struct jpeg_marker_struct); 13619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (((long) length_limit) > maxlength) 13629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length_limit = (unsigned int) maxlength; 13639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Choose processor routine to use. 13659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * APP0/APP14 have special requirements. 13669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 13679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (length_limit) { 13689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project processor = save_marker; 13699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If saving APP0/APP14, save at least enough for our internal use. */ 13709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (marker_code == (int) M_APP0 && length_limit < APP0_DATA_LEN) 13719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length_limit = APP0_DATA_LEN; 13729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else if (marker_code == (int) M_APP14 && length_limit < APP14_DATA_LEN) 13739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project length_limit = APP14_DATA_LEN; 13749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else { 13759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project processor = skip_variable; 13769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* If discarding APP0/APP14, use our regular on-the-fly processor. */ 13779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (marker_code == (int) M_APP0 || marker_code == (int) M_APP14) 13789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project processor = get_interesting_appn; 13799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 13809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (marker_code == (int) M_COM) { 13829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_COM = processor; 13839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->length_limit_COM = length_limit; 13849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15) { 13859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_APPn[marker_code - (int) M_APP0] = processor; 13869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->length_limit_APPn[marker_code - (int) M_APP0] = length_limit; 13879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } else 13889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code); 13899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 13909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif /* SAVE_MARKERS_SUPPORTED */ 13929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 13959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Install a special processing method for COM or APPn markers. 13969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 13979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 13989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 13999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code, 14009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project jpeg_marker_parser_method routine) 14019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 14029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 14039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 14049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (marker_code == (int) M_COM) 14059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_COM = routine; 14069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15) 14079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project marker->process_APPn[marker_code - (int) M_APP0] = routine; 14089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project else 14099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code); 14109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1411