1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#if !defined(_FX_JPEG_TURBO_) 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * jdmarker.c 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Copyright (C) 1991-1998, Thomas G. Lane. 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file is part of the Independent JPEG Group's software. 7ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * For conditions of distribution and use, see the accompanying README file. 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This file contains routines to decode JPEG datastream markers. 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Most of the complexity arises from our desire to support input 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * suspension: if not all of the data for a marker is available, 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * we must exit back to the application. On resumption, we reprocess 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the marker. 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define JPEG_INTERNALS 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "jinclude.h" 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#include "jpeglib.h" 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef enum { /* JPEG marker codes */ 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF0 = 0xc0, 23ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF1 = 0xc1, 24ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF2 = 0xc2, 25ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF3 = 0xc3, 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF5 = 0xc5, 28ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF6 = 0xc6, 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF7 = 0xc7, 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_JPG = 0xc8, 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF9 = 0xc9, 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF10 = 0xca, 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF11 = 0xcb, 35ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF13 = 0xcd, 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF14 = 0xce, 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOF15 = 0xcf, 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 40ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_DHT = 0xc4, 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_DAC = 0xcc, 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST0 = 0xd0, 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST1 = 0xd1, 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST2 = 0xd2, 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST3 = 0xd3, 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST4 = 0xd4, 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST5 = 0xd5, 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST6 = 0xd6, 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_RST7 = 0xd7, 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOI = 0xd8, 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_EOI = 0xd9, 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_SOS = 0xda, 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_DQT = 0xdb, 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_DNL = 0xdc, 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_DRI = 0xdd, 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_DHP = 0xde, 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_EXP = 0xdf, 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP0 = 0xe0, 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP1 = 0xe1, 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP2 = 0xe2, 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP3 = 0xe3, 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP4 = 0xe4, 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP5 = 0xe5, 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP6 = 0xe6, 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP7 = 0xe7, 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP8 = 0xe8, 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP9 = 0xe9, 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP10 = 0xea, 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP11 = 0xeb, 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP12 = 0xec, 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP13 = 0xed, 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP14 = 0xee, 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_APP15 = 0xef, 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_JPG0 = 0xf0, 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_JPG13 = 0xfd, 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_COM = 0xfe, 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_TEM = 0x01, 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov M_ERROR = 0x100 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} JPEG_MARKER; 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Private state */ 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef struct { 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov struct jpeg_marker_reader pub; /* public fields */ 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Application-overridable marker processing methods */ 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_marker_parser_method process_COM; 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_marker_parser_method process_APPn[16]; 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 98ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Limit on marker data length to save for each marker type */ 99ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int length_limit_COM; 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int length_limit_APPn[16]; 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Status of COM/APPn marker saving */ 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_saved_marker_ptr cur_marker; /* NULL if not processing a marker */ 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int bytes_read; /* data bytes read so far in marker */ 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Note: cur_marker is not linked into marker_list until it's all read. */ 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} my_marker_reader; 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovtypedef my_marker_reader * my_marker_ptr; 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Macros for fetching data from the data source module. 113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * At all times, cinfo->src->next_input_byte and ->bytes_in_buffer reflect 115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the current restart point; we update them only when we have reached a 116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * suitable place to restart if a suspension occurs. 117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Declare and initialize local copies of input pointer/count */ 120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INPUT_VARS(cinfo) \ 121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov struct jpeg_source_mgr * datasrc = (cinfo)->src; \ 122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov const JOCTET * next_input_byte = datasrc->next_input_byte; \ 123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov size_t bytes_in_buffer = datasrc->bytes_in_buffer 124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Unload the local copies --- do this only at a restart boundary */ 126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INPUT_SYNC(cinfo) \ 127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ( datasrc->next_input_byte = next_input_byte, \ 128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov datasrc->bytes_in_buffer = bytes_in_buffer ) 129ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 130ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Reload the local copies --- used only in MAKE_BYTE_AVAIL */ 131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INPUT_RELOAD(cinfo) \ 132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ( next_input_byte = datasrc->next_input_byte, \ 133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_in_buffer = datasrc->bytes_in_buffer ) 134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Internal macro for INPUT_BYTE and INPUT_2BYTES: make a byte available. 136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Note we do *not* do INPUT_SYNC before calling fill_input_buffer, 137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but we must reload the local copies after a successful fill. 138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define MAKE_BYTE_AVAIL(cinfo,action) \ 140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (bytes_in_buffer == 0) { \ 141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! (*datasrc->fill_input_buffer) (cinfo)) \ 142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { action; } \ 143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_RELOAD(cinfo); \ 144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 146ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Read a byte into variable V. 147ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * If must suspend, take the specified action (typically "return FALSE"). 148ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 149ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INPUT_BYTE(cinfo,V,action) \ 150ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \ 151ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_in_buffer--; \ 152ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov V = GETJOCTET(*next_input_byte++); ) 153ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 154ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* As above, but read two bytes interpreted as an unsigned 16-bit integer. 155ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * V should be declared unsigned int or perhaps INT32. 156ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 157ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define INPUT_2BYTES(cinfo,V,action) \ 158ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \ 159ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_in_buffer--; \ 160ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov V = ((unsigned int) GETJOCTET(*next_input_byte++)) << 8; \ 161ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAKE_BYTE_AVAIL(cinfo,action); \ 162ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_in_buffer--; \ 163ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov V += GETJOCTET(*next_input_byte++); ) 164ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 165ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 166ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 167ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Routines to process JPEG markers. 168ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 169ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Entry condition: JPEG marker itself has been read and its code saved 170ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * in cinfo->unread_marker; input restart point is just after the marker. 171ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 172ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Exit: if return TRUE, have read and processed any parameters, and have 173ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * updated the restart point to point after the parameters. 174ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * If return FALSE, was forced to suspend before reaching end of 175ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * marker parameters; restart point has not been moved. Same routine 176ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * will be called again after application supplies more input data. 177ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 178ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This approach to suspension assumes that all of a marker's parameters 179ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * can fit into a single input bufferload. This should hold for "normal" 180ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * markers. Some COM/APPn markers might have large parameter segments 181ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * that might not fit. If we are simply dropping such a marker, we use 182ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * skip_input_data to get past it, and thereby put the problem on the 183ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * source manager's shoulders. If we are saving the marker's contents 184ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * into memory, we use a slightly different convention: when forced to 185ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * suspend, the marker processor updates the restart point to the end of 186ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * what it's consumed (ie, the end of the buffer) before returning FALSE. 187ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * On resumption, cinfo->unread_marker still contains the marker code, 188ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but the data source will point to the next chunk of marker data. 189ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * The marker processor must retain internal state to deal with this. 190ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 191ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Note that we don't bother to avoid duplicate trace messages if a 192ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * suspension occurs within marker parameters. Other side effects 193ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * require more care. 194ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 195ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 196ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 197ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 198ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_soi (j_decompress_ptr cinfo) 199ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process an SOI marker */ 200ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 201ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int i; 202ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 203ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS(cinfo, 1, JTRC_SOI); 204ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 205ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->marker->saw_SOI) 206ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_SOI_DUPLICATE); 207ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 208ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reset all parameters that are defined to be reset by SOI */ 209ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 210ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < NUM_ARITH_TBLS; i++) { 211ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_dc_L[i] = 0; 212ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_dc_U[i] = 1; 213ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_ac_K[i] = 5; 214ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 215ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->restart_interval = 0; 216ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 217ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Set initial assumptions for colorspace etc */ 218ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 219ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->jpeg_color_space = JCS_UNKNOWN; 220ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->CCIR601_sampling = FALSE; /* Assume non-CCIR sampling??? */ 221ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 222ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->saw_JFIF_marker = FALSE; 223ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->JFIF_major_version = 1; /* set default JFIF APP0 values */ 224ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->JFIF_minor_version = 1; 225ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->density_unit = 0; 226ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->X_density = 1; 227ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Y_density = 1; 228ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->saw_Adobe_marker = FALSE; 229ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Adobe_transform = 0; 230ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 231ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->saw_SOI = TRUE; 232ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 233ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 234ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 235ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 236ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 237ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 238ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith) 239ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process a SOFn marker */ 240ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 241ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 242ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int c, ci; 243ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_component_info * compptr; 244ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* LiuSunliang added 20111209 */ 245ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JDIMENSION image_width, image_height; 246ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 247ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 248ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->progressive_mode = is_prog; 249ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_code = is_arith; 250ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 251ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 252ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 253ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, cinfo->data_precision, return FALSE); 254ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, image_height, return FALSE); 255ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, image_width, return FALSE); 256ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, cinfo->num_components, return FALSE); 257ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 258ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (image_width <= JPEG_MAX_DIMENSION) 259ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->image_width = image_width; 260ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 261ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (image_height <= JPEG_MAX_DIMENSION) 262ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->image_height = image_height; 263ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 264ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 8; 265ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 266ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS4(cinfo, 1, JTRC_SOF, cinfo->unread_marker, 267ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (int) cinfo->image_width, (int) cinfo->image_height, 268ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->num_components); 269ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 270ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->marker->saw_SOF) 271ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_SOF_DUPLICATE); 272ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 273ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We don't support files in which the image height is initially specified */ 274ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* as 0 and is later redefined by DNL. As long as we have to check that, */ 275ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* might as well have a general sanity check. */ 276ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->image_height <= 0 || cinfo->image_width <= 0 277ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov || cinfo->num_components <= 0) 278ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_EMPTY_IMAGE); 279ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 280ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length != (cinfo->num_components * 3)) 281ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_LENGTH); 282ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 283ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->comp_info == NULL) /* do only once, even if suspend */ 284ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->comp_info = (jpeg_component_info *) (*cinfo->mem->alloc_small) 285ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ((j_common_ptr) cinfo, JPOOL_IMAGE, 286ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->num_components * SIZEOF(jpeg_component_info)); 287ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 288ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 289ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ci++, compptr++) { 290ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->component_index = ci; 291ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, compptr->component_id, return FALSE); 292ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* XYQ 2008-03-25: Adobe CMYK JPEG has serious flaw: the K channel has same component id as C channel */ 293ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 294ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int i; 295ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < ci; i ++) 296ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (compptr->component_id == cinfo->comp_info[i].component_id) break; 297ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (i < ci) 298ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Found the error! We replace the id with something unlikely used elsewhere */ 299ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->component_id += 0xf0; 300ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 301ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* end of modification */ 302ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 303ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->h_samp_factor = (c >> 4) & 15; 304ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->v_samp_factor = (c ) & 15; 305ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, compptr->quant_tbl_no, return FALSE); 306ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 307ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS4(cinfo, 1, JTRC_SOF_COMPONENT, 308ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->component_id, compptr->h_samp_factor, 309ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->v_samp_factor, compptr->quant_tbl_no); 310ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 311ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 312ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->saw_SOF = TRUE; 313ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 314ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 315ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 316ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 317ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 318ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 319ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 320ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_sos (j_decompress_ptr cinfo) 321ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process a SOS marker */ 322ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 323ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 324ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int i, ci, n, c, cc; 325ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_component_info * compptr; 326ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 327ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 328ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! cinfo->marker->saw_SOF) 329ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_SOS_NO_SOF); 330ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 331ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 332ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 333ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, n, return FALSE); /* Number of components */ 334ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 335ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_SOS, n); 336ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 337ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length != (n * 2 + 6) || n < 1 || n > MAX_COMPS_IN_SCAN) 338ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_LENGTH); 339ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 340ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->comps_in_scan = n; 341ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 342ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Collect the component-spec parameters */ 343ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 344ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < n; i++) { 345ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, cc, return FALSE); 346ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 347ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 348ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* XYQ 2008-03-25: Adobe CMYK JPEG has serious flaw: the K channel has same component id as C channel */ 349ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 350ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int j; 351ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (j = 0; j < i; j ++) 352ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cc == cinfo->cur_comp_info[j]->component_id) break; 353ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (j < i) 354ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* found the error! */ 355ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cc += 0xf0; 356ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 357ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* end of modification */ 358ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 359ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ci++, compptr++) { 360ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cc == compptr->component_id) 361ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov goto id_found; 362ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 363ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 364ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc); 365ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 366ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov id_found: 367ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 368ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->cur_comp_info[i] = compptr; 369ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->dc_tbl_no = (c >> 4) & 15; 370ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->ac_tbl_no = (c ) & 15; 371ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 372ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS3(cinfo, 1, JTRC_SOS_COMPONENT, cc, 373ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov compptr->dc_tbl_no, compptr->ac_tbl_no); 374ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* This CSi (cc) should differ from the previous CSi */ 375ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (ci = 0; ci < i; ci++) { 376ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->cur_comp_info[ci] == compptr) 377ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc); 378ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 379ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 380ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 381ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Collect the additional scan parameters Ss, Se, Ah/Al. */ 382ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 383ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ss = c; 384ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 385ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Se = c; 386ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 387ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ah = (c >> 4) & 15; 388ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Al = (c ) & 15; 389ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 390ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS4(cinfo, 1, JTRC_SOS_PARAMS, cinfo->Ss, cinfo->Se, 391ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Ah, cinfo->Al); 392ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 393ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Prepare to scan data & restart markers */ 394ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->next_restart_num = 0; 395ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 396ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Count another SOS marker */ 397ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->input_scan_number++; 398ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 399ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 400ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 401ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 402ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 403ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 404ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef D_ARITH_CODING_SUPPORTED 405ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 406ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 407ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_dac (j_decompress_ptr cinfo) 408ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process a DAC marker */ 409ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 410ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 411ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int index, val; 412ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 413ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 414ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 415ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 416ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 417ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (length > 0) { 418ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, index, return FALSE); 419ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, val, return FALSE); 420ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 421ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 422ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 423ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 1, JTRC_DAC, index, val); 424ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 425ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (index < 0 || index >= (2*NUM_ARITH_TBLS)) 426ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_DAC_INDEX, index); 427ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 428ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (index >= NUM_ARITH_TBLS) { /* define AC table */ 429ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_ac_K[index-NUM_ARITH_TBLS] = (UINT8) val; 430ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { /* define DC table */ 431ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_dc_L[index] = (UINT8) (val & 0x0F); 432ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->arith_dc_U[index] = (UINT8) (val >> 4); 433ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->arith_dc_L[index] > cinfo->arith_dc_U[index]) 434ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_DAC_VALUE, val); 435ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 436ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 437ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 438ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length != 0) 439ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_LENGTH); 440ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 441ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 442ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 443ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 444ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 445ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#else /* ! D_ARITH_CODING_SUPPORTED */ 446ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 447ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define get_dac(cinfo) skip_variable(cinfo) 448ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 449ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* D_ARITH_CODING_SUPPORTED */ 450ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 451ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 452ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 453ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_dht (j_decompress_ptr cinfo) 454ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process a DHT marker */ 455ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 456ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 457ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov UINT8 bits[17]; 458ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov UINT8 huffval[256]; 459ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int i, index, count; 460ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JHUFF_TBL **htblptr; 461ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 462ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 463ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 464ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 465ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 466ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (length > 16) { 467ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, index, return FALSE); 468ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 469ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_DHT, index); 470ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 471ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bits[0] = 0; 472ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov count = 0; 473ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 1; i <= 16; i++) { 474ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, bits[i], return FALSE); 475ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov count += bits[i]; 476ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 477ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 478ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 1 + 16; 479ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 480ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS8(cinfo, 2, JTRC_HUFFBITS, 481ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bits[1], bits[2], bits[3], bits[4], 482ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bits[5], bits[6], bits[7], bits[8]); 483ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS8(cinfo, 2, JTRC_HUFFBITS, 484ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bits[9], bits[10], bits[11], bits[12], 485ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bits[13], bits[14], bits[15], bits[16]); 486ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 487ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Here we just do minimal validation of the counts to avoid walking 488ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * off the end of our table space. jdhuff.c will check more carefully. 489ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 490ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (count > 256 || ((INT32) count) > length) 491ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_HUFF_TABLE); 492ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 493ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < count; i++) 494ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, huffval[i], return FALSE); 495ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 496ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= count; 497ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 498ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (index & 0x10) { /* AC table definition */ 499ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov index -= 0x10; 500ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov htblptr = &cinfo->ac_huff_tbl_ptrs[index]; 501ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { /* DC table definition */ 502ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov htblptr = &cinfo->dc_huff_tbl_ptrs[index]; 503ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 504ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 505ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (index < 0 || index >= NUM_HUFF_TBLS) 506ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_DHT_INDEX, index); 507ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 508ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (*htblptr == NULL) 509ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo); 510ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 511ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits)); 512ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MEMCOPY((*htblptr)->huffval, huffval, SIZEOF((*htblptr)->huffval)); 513ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 514ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 515ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length != 0) 516ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_LENGTH); 517ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 518ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 519ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 520ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 521ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 522ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 523ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 524ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_dqt (j_decompress_ptr cinfo) 525ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process a DQT marker */ 526ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 527ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 528ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int n, i, prec; 529ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int tmp; 530ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JQUANT_TBL *quant_ptr; 531ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 532ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 533ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 534ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 535ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 536ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (length > 0) { 537ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, n, return FALSE); 538ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov prec = n >> 4; 539ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov n &= 0x0F; 540ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 541ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 1, JTRC_DQT, n, prec); 542ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 543ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (n >= NUM_QUANT_TBLS) 544ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_DQT_INDEX, n); 545ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 546ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->quant_tbl_ptrs[n] == NULL) 547ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->quant_tbl_ptrs[n] = jpeg_alloc_quant_table((j_common_ptr) cinfo); 548ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov quant_ptr = cinfo->quant_tbl_ptrs[n]; 549ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 550ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < DCTSIZE2; i++) { 551ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (prec) 552ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, tmp, return FALSE); 553ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 554ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, tmp, return FALSE); 555ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We convert the zigzag-order table to natural array order. */ 556ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov quant_ptr->quantval[jpeg_natural_order[i]] = (UINT16) tmp; 557ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 558ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 559ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->err->trace_level >= 2) { 560ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < DCTSIZE2; i += 8) { 561ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS8(cinfo, 2, JTRC_QUANTVALS, 562ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov quant_ptr->quantval[i], quant_ptr->quantval[i+1], 563ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov quant_ptr->quantval[i+2], quant_ptr->quantval[i+3], 564ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov quant_ptr->quantval[i+4], quant_ptr->quantval[i+5], 565ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov quant_ptr->quantval[i+6], quant_ptr->quantval[i+7]); 566ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 567ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 568ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 569ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= DCTSIZE2+1; 570ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (prec) length -= DCTSIZE2; 571ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 572ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 573ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length != 0) 574ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_LENGTH); 575ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 576ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 577ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 578ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 579ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 580ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 581ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 582ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_dri (j_decompress_ptr cinfo) 583ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process a DRI marker */ 584ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 585ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 586ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int tmp; 587ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 588ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 589ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 590ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 591ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length != 4) 592ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT(cinfo, JERR_BAD_LENGTH); 593ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 594ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, tmp, return FALSE); 595ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 596ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_DRI, tmp); 597ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 598ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->restart_interval = tmp; 599ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 600ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 601ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 602ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 603ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 604ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 605ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 606ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Routines for processing APPn and COM markers. 607ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * These are either saved in memory or discarded, per application request. 608ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * APP0 and APP14 are specially checked to see if they are 609ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * JFIF and Adobe markers, respectively. 610ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 611ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 612ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define APP0_DATA_LEN 14 /* Length of interesting data in APP0 */ 613ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define APP14_DATA_LEN 12 /* Length of interesting data in APP14 */ 614ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define APPN_DATA_LEN 14 /* Must be the largest of the above!! */ 615ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 616ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 617ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 618ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovexamine_app0 (j_decompress_ptr cinfo, JOCTET FAR * data, 619ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int datalen, INT32 remaining) 620ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Examine first few bytes from an APP0. 621ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Take appropriate action if it is a JFIF marker. 622ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * datalen is # of bytes at data[], remaining is length of rest of marker data. 623ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 624ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 625ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 totallen = (INT32) datalen + remaining; 626ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 627ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (datalen >= APP0_DATA_LEN && 628ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[0]) == 0x4A && 629ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[1]) == 0x46 && 630ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[2]) == 0x49 && 631ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[3]) == 0x46 && 632ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[4]) == 0) { 633ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Found JFIF APP0 marker: save info */ 634ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->saw_JFIF_marker = TRUE; 635ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->JFIF_major_version = GETJOCTET(data[5]); 636ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->JFIF_minor_version = GETJOCTET(data[6]); 637ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->density_unit = GETJOCTET(data[7]); 638ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->X_density = (GETJOCTET(data[8]) << 8) + GETJOCTET(data[9]); 639ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Y_density = (GETJOCTET(data[10]) << 8) + GETJOCTET(data[11]); 640ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Check version. 641ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Major version must be 1, anything else signals an incompatible change. 642ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * (We used to treat this as an error, but now it's a nonfatal warning, 643ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * because some bozo at Hijaak couldn't read the spec.) 644ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Minor version should be 0..2, but process anyway if newer. 645ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 646ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->JFIF_major_version != 1) 647ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov WARNMS2(cinfo, JWRN_JFIF_MAJOR, 648ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->JFIF_major_version, cinfo->JFIF_minor_version); 649ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Generate trace messages */ 650ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS5(cinfo, 1, JTRC_JFIF, 651ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->JFIF_major_version, cinfo->JFIF_minor_version, 652ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->X_density, cinfo->Y_density, cinfo->density_unit); 653ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Validate thumbnail dimensions and issue appropriate messages */ 654ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (GETJOCTET(data[12]) | GETJOCTET(data[13])) 655ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL, 656ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[12]), GETJOCTET(data[13])); 657ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov totallen -= APP0_DATA_LEN; 658ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (totallen != 659ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ((INT32)GETJOCTET(data[12]) * (INT32)GETJOCTET(data[13]) * (INT32) 3)) 660ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int) totallen); 661ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else if (datalen >= 6 && 662ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[0]) == 0x4A && 663ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[1]) == 0x46 && 664ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[2]) == 0x58 && 665ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[3]) == 0x58 && 666ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[4]) == 0) { 667ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Found JFIF "JFXX" extension APP0 marker */ 668ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The library doesn't actually do anything with these, 669ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but we try to produce a helpful trace message. 670ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 671ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (GETJOCTET(data[5])) { 672ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case 0x10: 673ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_THUMB_JPEG, (int) totallen); 674ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 675ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case 0x11: 676ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_THUMB_PALETTE, (int) totallen); 677ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 678ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case 0x13: 679ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_THUMB_RGB, (int) totallen); 680ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 681ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov default: 682ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION, 683ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[5]), (int) totallen); 684ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 685ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 686ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 687ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Start of APP0 does not match "JFIF" or "JFXX", or too short */ 688ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_APP0, (int) totallen); 689ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 690ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 691ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 692ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 693ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(void) 694ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovexamine_app14 (j_decompress_ptr cinfo, JOCTET FAR * data, 695ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int datalen, INT32 remaining) 696ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Examine first few bytes from an APP14. 697ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Take appropriate action if it is an Adobe marker. 698ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * datalen is # of bytes at data[], remaining is length of rest of marker data. 699ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 700ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 701ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int version, flags0, flags1, transform; 702ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 703ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (datalen >= APP14_DATA_LEN && 704ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[0]) == 0x41 && 705ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[1]) == 0x64 && 706ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[2]) == 0x6F && 707ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[3]) == 0x62 && 708ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov GETJOCTET(data[4]) == 0x65) { 709ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Found Adobe APP14 marker */ 710ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov version = (GETJOCTET(data[5]) << 8) + GETJOCTET(data[6]); 711ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov flags0 = (GETJOCTET(data[7]) << 8) + GETJOCTET(data[8]); 712ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov flags1 = (GETJOCTET(data[9]) << 8) + GETJOCTET(data[10]); 713ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov transform = GETJOCTET(data[11]); 714ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform); 715ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->saw_Adobe_marker = TRUE; 716ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->Adobe_transform = (UINT8) transform; 717ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 718ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Start of APP14 does not match "Adobe", or too short */ 719ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_APP14, (int) (datalen + remaining)); 720ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 721ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 722ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 723ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 724ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(boolean) 725ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovget_interesting_appn (j_decompress_ptr cinfo) 726ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Process an APP0 or APP14 marker without saving it */ 727ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 728ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 729ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JOCTET b[APPN_DATA_LEN]; 730ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int i, numtoread; 731ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 732ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 733ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 734ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 735ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 736ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* get the interesting part of the marker data */ 737ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length >= APPN_DATA_LEN) 738ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov numtoread = APPN_DATA_LEN; 739ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else if (length > 0) 740ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov numtoread = (unsigned int) length; 741ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 742ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov numtoread = 0; 743ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < numtoread; i++) 744ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, b[i], return FALSE); 745ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= numtoread; 746ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 747ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* process it */ 748ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (cinfo->unread_marker) { 749ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP0: 750ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov examine_app0(cinfo, (JOCTET FAR *) b, numtoread, length); 751ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 752ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP14: 753ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov examine_app14(cinfo, (JOCTET FAR *) b, numtoread, length); 754ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 755ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov default: 756ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* can't get here unless jpeg_save_markers chooses wrong processor */ 757ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker); 758ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 759ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 760ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 761ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* skip any remaining data -- could be lots */ 762ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 763ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length > 0) 764ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->src->skip_input_data) (cinfo, (long) length); 765ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 766ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 767ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 768ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 769ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 770ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef SAVE_MARKERS_SUPPORTED 771ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 772ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(boolean) 773ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovsave_marker (j_decompress_ptr cinfo) 774ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Save an APPn or COM marker into the marker list */ 775ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 776ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 777ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_saved_marker_ptr cur_marker = marker->cur_marker; 778ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int bytes_read, data_length; 779ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov JOCTET FAR * data; 780ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length = 0; 781ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 782ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 783ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cur_marker == NULL) { 784ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* begin reading a marker */ 785ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 786ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 787ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length >= 0) { /* watch out for bogus length word */ 788ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* figure out how much we want to save */ 789ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int limit; 790ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->unread_marker == (int) M_COM) 791ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov limit = marker->length_limit_COM; 792ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 793ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov limit = marker->length_limit_APPn[cinfo->unread_marker - (int) M_APP0]; 794ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if ((unsigned int) length < limit) 795ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov limit = (unsigned int) length; 796ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* allocate and initialize the marker item */ 797ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cur_marker = (jpeg_saved_marker_ptr) 798ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, 799ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SIZEOF(struct jpeg_marker_struct) + limit); 800ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cur_marker->next = NULL; 801ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cur_marker->marker = (UINT8) cinfo->unread_marker; 802ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cur_marker->original_length = (unsigned int) length; 803ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cur_marker->data_length = limit; 804ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* data area is just beyond the jpeg_marker_struct */ 805ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov data = cur_marker->data = (JOCTET FAR *) (cur_marker + 1); 806ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->cur_marker = cur_marker; 807ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->bytes_read = 0; 808ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_read = 0; 809ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov data_length = limit; 810ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 811ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* deal with bogus length word */ 812ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_read = data_length = 0; 813ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov data = NULL; 814ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 815ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 816ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* resume reading a marker */ 817ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_read = marker->bytes_read; 818ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov data_length = cur_marker->data_length; 819ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov data = cur_marker->data + bytes_read; 820ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 821ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 822ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (bytes_read < data_length) { 823ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); /* move the restart point to here */ 824ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->bytes_read = bytes_read; 825ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* If there's not at least one byte in buffer, suspend */ 826ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov MAKE_BYTE_AVAIL(cinfo, return FALSE); 827ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Copy bytes with reasonable rapidity */ 828ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (bytes_read < data_length && bytes_in_buffer > 0) { 829ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov *data++ = *next_input_byte++; 830ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_in_buffer--; 831ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov bytes_read++; 832ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 833ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 834ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 835ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Done reading what we want to read */ 836ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cur_marker != NULL) { /* will be NULL if bogus length word */ 837ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Add new marker to end of list */ 838ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->marker_list == NULL) { 839ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker_list = cur_marker; 840ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 841ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_saved_marker_ptr prev = cinfo->marker_list; 842ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (prev->next != NULL) 843ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov prev = prev->next; 844ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov prev->next = cur_marker; 845ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 846ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reset pointer & calc remaining data length */ 847ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov data = cur_marker->data; 848ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length = cur_marker->original_length - data_length; 849ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 850ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reset to initial state for next marker */ 851ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->cur_marker = NULL; 852ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 853ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Process the marker if interesting; else just make a generic trace msg */ 854ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (cinfo->unread_marker) { 855ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP0: 856ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov examine_app0(cinfo, data, data_length, length); 857ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 858ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP14: 859ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov examine_app14(cinfo, data, data_length, length); 860ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 861ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov default: 862ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, 863ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (int) (data_length + length)); 864ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 865ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 866ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 867ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* skip any remaining data -- could be lots */ 868ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); /* do before skip_input_data */ 869ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length > 0) 870ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->src->skip_input_data) (cinfo, (long) length); 871ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 872ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 873ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 874ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 875ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* SAVE_MARKERS_SUPPORTED */ 876ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 877ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 878ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(boolean) 879ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovskip_variable (j_decompress_ptr cinfo) 880ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Skip over an unknown or uninteresting variable-length marker */ 881ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 882ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INT32 length; 883ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 884ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 885ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_2BYTES(cinfo, length, return FALSE); 886ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length -= 2; 887ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 888ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, (int) length); 889ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 890ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); /* do before skip_input_data */ 891ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length > 0) 892ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->src->skip_input_data) (cinfo, (long) length); 893ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 894ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 895ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 896ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 897ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 898ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 899ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Find the next JPEG marker, save it in cinfo->unread_marker. 900ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Returns FALSE if had to suspend before reaching a marker; 901ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * in that case cinfo->unread_marker is unchanged. 902ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 903ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Note that the result might not be a valid marker code, 904ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but it will never be 0 or FF. 905ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 906ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 907ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 908ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovnext_marker (j_decompress_ptr cinfo) 909ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 910ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int c; 911ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 912ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 913ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (;;) { 914ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 915ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Skip any non-FF bytes. 916ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This may look a bit inefficient, but it will not occur in a valid file. 917ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We sync after each discarded byte so that a suspending data source 918ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * can discard the byte from its buffer. 919ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 920ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov while (c != 0xFF) { 921ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->discarded_bytes++; 922ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 923ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 924ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 925ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* This loop swallows any duplicate FF bytes. Extra FFs are legal as 926ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * pad bytes, so don't count them in discarded_bytes. We assume there 927ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * will not be so many consecutive FF bytes as to overflow a suspending 928ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * data source's input buffer. 929ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 930ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov do { 931ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 932ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } while (c == 0xFF); 933ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (c != 0) 934ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; /* found a valid marker, exit loop */ 935ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reach here if we found a stuffed-zero data sequence (FF/00). 936ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Discard it and loop back to try again. 937ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 938ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->discarded_bytes += 2; 939ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 940ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 941ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 942ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->marker->discarded_bytes != 0) { 943ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov WARNMS2(cinfo, JWRN_EXTRANEOUS_DATA, cinfo->marker->discarded_bytes, c); 944ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->discarded_bytes = 0; 945ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 946ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 947ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = c; 948ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 949ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 950ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 951ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 952ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 953ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 954ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovLOCAL(boolean) 955ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovfirst_marker (j_decompress_ptr cinfo) 956ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Like next_marker, but used to obtain the initial SOI marker. */ 957ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* For this marker, we do not allow preceding garbage or fill; otherwise, 958ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * we might well scan an entire input file before realizing it ain't JPEG. 959ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * If an application wants to process non-JFIF files, it must seek to the 960ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * SOI before calling the JPEG library. 961ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 962ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 963ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int c, c2; 964ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_VARS(cinfo); 965ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 966ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c, return FALSE); 967ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_BYTE(cinfo, c2, return FALSE); 968ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (c != 0xFF || c2 != (int) M_SOI) 969ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT2(cinfo, JERR_NO_SOI, c, c2); 970ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 971ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = c2; 972ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 973ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov INPUT_SYNC(cinfo); 974ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 975ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 976ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 977ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 978ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 979ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Read markers until SOS or EOI. 980ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 981ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Returns same codes as are defined for jpeg_consume_input: 982ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI. 983ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 984ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 985ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(int) 986ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovread_markers (j_decompress_ptr cinfo) 987ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 988ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Outer loop repeats once for each marker. */ 989ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (;;) { 990ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Collect the marker proper, unless we already did. */ 991ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* NB: first_marker() enforces the requirement that SOI appear first. */ 992ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->unread_marker == 0) { 993ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! cinfo->marker->saw_SOI) { 994ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! first_marker(cinfo)) 995ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 996ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 997ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! next_marker(cinfo)) 998ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 999ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1000ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1001ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* At this point cinfo->unread_marker contains the marker code and the 1002ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * input point is just past the marker proper, but before any parameters. 1003ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * A suspension will cause us to return with this state still true. 1004ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1005ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (cinfo->unread_marker) { 1006ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOI: 1007ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_soi(cinfo)) 1008ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1009ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1010ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1011ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF0: /* Baseline */ 1012ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF1: /* Extended sequential, Huffman */ 1013ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_sof(cinfo, FALSE, FALSE)) 1014ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1015ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1016ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1017ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF2: /* Progressive, Huffman */ 1018ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_sof(cinfo, TRUE, FALSE)) 1019ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1020ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1021ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1022ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF9: /* Extended sequential, arithmetic */ 1023ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_sof(cinfo, FALSE, TRUE)) 1024ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1025ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1026ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1027ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF10: /* Progressive, arithmetic */ 1028ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_sof(cinfo, TRUE, TRUE)) 1029ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1030ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1031ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1032ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Currently unsupported SOFn types */ 1033ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF3: /* Lossless, Huffman */ 1034ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF5: /* Differential sequential, Huffman */ 1035ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF6: /* Differential progressive, Huffman */ 1036ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF7: /* Differential lossless, Huffman */ 1037ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_JPG: /* Reserved for JPEG extensions */ 1038ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF11: /* Lossless, arithmetic */ 1039ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF13: /* Differential sequential, arithmetic */ 1040ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF14: /* Differential progressive, arithmetic */ 1041ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOF15: /* Differential lossless, arithmetic */ 1042ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_SOF_UNSUPPORTED, cinfo->unread_marker); 1043ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1044ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1045ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_SOS: 1046ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_sos(cinfo)) 1047ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1048ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = 0; /* processed the marker */ 1049ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_REACHED_SOS; 1050ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1051ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_EOI: 1052ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS(cinfo, 1, JTRC_EOI); 1053ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = 0; /* processed the marker */ 1054ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_REACHED_EOI; 1055ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1056ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_DAC: 1057ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_dac(cinfo)) 1058ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1059ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1060ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1061ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_DHT: 1062ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_dht(cinfo)) 1063ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1064ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1065ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1066ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_DQT: 1067ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_dqt(cinfo)) 1068ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1069ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1070ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1071ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_DRI: 1072ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! get_dri(cinfo)) 1073ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1074ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1075ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1076ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP0: 1077ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP1: 1078ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP2: 1079ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP3: 1080ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP4: 1081ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP5: 1082ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP6: 1083ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP7: 1084ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP8: 1085ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP9: 1086ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP10: 1087ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP11: 1088ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP12: 1089ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP13: 1090ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP14: 1091ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_APP15: 1092ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! (*((my_marker_ptr) cinfo->marker)->process_APPn[ 1093ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker - (int) M_APP0]) (cinfo)) 1094ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1095ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1096ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1097ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_COM: 1098ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! (*((my_marker_ptr) cinfo->marker)->process_COM) (cinfo)) 1099ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST0: /* these are all parameterless */ 1103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST1: 1104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST2: 1105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST3: 1106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST4: 1107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST5: 1108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST6: 1109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_RST7: 1110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_TEM: 1111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 1, JTRC_PARMLESS_MARKER, cinfo->unread_marker); 1112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case M_DNL: /* Ignore DNL ... perhaps the wrong thing */ 1115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! skip_variable(cinfo)) 1116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return JPEG_SUSPENDED; 1117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov default: /* must be DHP, EXP, JPGn, or RESn */ 1120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* For now, we treat the reserved markers as fatal errors since they are 1121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * likely to be used to signal incompatible JPEG Part 3 extensions. 1122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Once the JPEG 3 version-number marker is well defined, this code 1123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * ought to change! 1124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker); 1126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Successfully processed marker, so reset state variable */ 1129ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = 0; 1130ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } /* end loop */ 1131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Read a restart marker, which is expected to appear next in the datastream; 1136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * if the marker is not there, take appropriate recovery action. 1137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Returns FALSE if suspension is required. 1138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 1139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This is called by the entropy decoder after it has read an appropriate 1140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * number of MCUs. cinfo->unread_marker may be nonzero if the entropy decoder 1141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * has already read a marker from the data source. Under normal conditions 1142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * cinfo->unread_marker will be reset to 0 before returning; if not reset, 1143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * it holds a marker which the decoder will be unable to read past. 1144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1146ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(boolean) 1147ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovread_restart_marker (j_decompress_ptr cinfo) 1148ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 1149ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Obtain a marker unless we already did. */ 1150ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Note that next_marker will complain if it skips any data. */ 1151ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->unread_marker == 0) { 1152ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! next_marker(cinfo)) 1153ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return FALSE; 1154ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1155ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1156ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (cinfo->unread_marker == 1157ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ((int) M_RST0 + cinfo->marker->next_restart_num)) { 1158ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Normal case --- swallow the marker and let entropy decoder continue */ 1159ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS1(cinfo, 3, JTRC_RST, cinfo->marker->next_restart_num); 1160ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = 0; 1161ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 1162ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Uh-oh, the restart markers have been messed up. */ 1163ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Let the data source manager determine how to resync. */ 1164ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! (*cinfo->src->resync_to_restart) (cinfo, 1165ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->next_restart_num)) 1166ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return FALSE; 1167ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1168ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1169ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Update next-restart state */ 1170ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker->next_restart_num = (cinfo->marker->next_restart_num + 1) & 7; 1171ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1172ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 1173ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1174ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1175ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1176ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1177ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This is the default resync_to_restart method for data source managers 1178ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * to use if they don't have any better approach. Some data source managers 1179ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * may be able to back up, or may have additional knowledge about the data 1180ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * which permits a more intelligent recovery strategy; such managers would 1181ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * presumably supply their own resync method. 1182ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 1183ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * read_restart_marker calls resync_to_restart if it finds a marker other than 1184ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the restart marker it was expecting. (This code is *not* used unless 1185ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * a nonzero restart interval has been declared.) cinfo->unread_marker is 1186ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the marker code actually found (might be anything, except 0 or FF). 1187ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * The desired restart marker number (0..7) is passed as a parameter. 1188ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This routine is supposed to apply whatever error recovery strategy seems 1189ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * appropriate in order to position the input stream to the next data segment. 1190ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Note that cinfo->unread_marker is treated as a marker appearing before 1191ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * the current data-source input point; usually it should be reset to zero 1192ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * before returning. 1193ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Returns FALSE if suspension is required. 1194ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 1195ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This implementation is substantially constrained by wanting to treat the 1196ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * input as a data stream; this means we can't back up. Therefore, we have 1197ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * only the following actions to work with: 1198ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 1. Simply discard the marker and let the entropy decoder resume at next 1199ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * byte of file. 1200ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 2. Read forward until we find another marker, discarding intervening 1201ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * data. (In theory we could look ahead within the current bufferload, 1202ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * without having to discard data if we don't find the desired marker. 1203ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This idea is not implemented here, in part because it makes behavior 1204ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * dependent on buffer size and chance buffer-boundary positions.) 1205ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 3. Leave the marker unread (by failing to zero cinfo->unread_marker). 1206ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This will cause the entropy decoder to process an empty data segment, 1207ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * inserting dummy zeroes, and then we will reprocess the marker. 1208ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * 1209ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * #2 is appropriate if we think the desired marker lies ahead, while #3 is 1210ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * appropriate if the found marker is a future restart marker (indicating 1211ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * that we have missed the desired restart marker, probably because it got 1212ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * corrupted). 1213ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * We apply #2 or #3 if the found marker is a restart marker no more than 1214ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * two counts behind or ahead of the expected one. We also apply #2 if the 1215ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * found marker is not a legal JPEG marker code (it's certainly bogus data). 1216ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * If the found marker is a restart marker more than 2 counts away, we do #1 1217ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * (too much risk that the marker is erroneous; with luck we will be able to 1218ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * resync at some future point). 1219ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * For any valid non-restart JPEG marker, we apply #3. This keeps us from 1220ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * overrunning the end of a scan. An implementation limited to single-scan 1221ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * files might find it better to apply #2 for markers other than EOI, since 1222ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * any other marker would have to be bogus data in that case. 1223ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1224ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1225ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovGLOBAL(boolean) 1226ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovjpeg_resync_to_restart (j_decompress_ptr cinfo, int desired) 1227ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 1228ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int marker = cinfo->unread_marker; 1229ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int action = 1; 1230ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1231ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Always put up a warning. */ 1232ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov WARNMS2(cinfo, JWRN_MUST_RESYNC, marker, desired); 1233ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1234ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Outer loop handles repeated decision after scanning forward. */ 1235ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (;;) { 1236ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (marker < (int) M_SOF0) 1237ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov action = 2; /* invalid marker */ 1238ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else if (marker < (int) M_RST0 || marker > (int) M_RST7) 1239ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov action = 3; /* valid non-restart marker */ 1240ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else { 1241ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (marker == ((int) M_RST0 + ((desired+1) & 7)) || 1242ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker == ((int) M_RST0 + ((desired+2) & 7))) 1243ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov action = 3; /* one of the next two expected restarts */ 1244ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else if (marker == ((int) M_RST0 + ((desired-1) & 7)) || 1245ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker == ((int) M_RST0 + ((desired-2) & 7))) 1246ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov action = 2; /* a prior restart, so advance */ 1247ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 1248ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov action = 1; /* desired restart or too far away */ 1249ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1250ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TRACEMS2(cinfo, 4, JTRC_RECOVERY_ACTION, marker, action); 1251ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov switch (action) { 1252ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case 1: 1253ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Discard marker and let entropy decoder resume processing. */ 1254ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = 0; 1255ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 1256ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case 2: 1257ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Scan to the next marker, and repeat the decision loop. */ 1258ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (! next_marker(cinfo)) 1259ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return FALSE; 1260ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker = cinfo->unread_marker; 1261ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov break; 1262ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov case 3: 1263ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Return without advancing past this marker. */ 1264ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Entropy decoder will be forced to process an empty segment. */ 1265ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov return TRUE; 1266ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1267ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } /* end loop */ 1268ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1269ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1270ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1271ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1272ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Reset marker processing state to begin a fresh datastream. 1273ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1274ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1275ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovMETHODDEF(void) 1276ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovreset_marker_reader (j_decompress_ptr cinfo) 1277ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 1278ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 1279ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1280ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->comp_info = NULL; /* until allocated by get_sof */ 1281ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->input_scan_number = 0; /* no SOS seen yet */ 1282ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->unread_marker = 0; /* no pending marker */ 1283ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->pub.saw_SOI = FALSE; /* set internal state too */ 1284ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->pub.saw_SOF = FALSE; 1285ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->pub.discarded_bytes = 0; 1286ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->cur_marker = NULL; 1287ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1288ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1289ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1290ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1291ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Initialize the marker reader module. 1292ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * This is called only once, when the decompression object is created. 1293ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1294ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1295ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovGLOBAL(void) 1296ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovjinit_marker_reader (j_decompress_ptr cinfo) 1297ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 1298ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_marker_ptr marker; 1299ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov int i; 1300ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1301ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Create subobject in permanent pool */ 1302ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker = (my_marker_ptr) 1303ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, 1304ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov SIZEOF(my_marker_reader)); 1305ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov cinfo->marker = (struct jpeg_marker_reader *) marker; 1306ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Initialize public method pointers */ 1307ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->pub.reset_marker_reader = reset_marker_reader; 1308ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->pub.read_markers = read_markers; 1309ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->pub.read_restart_marker = read_restart_marker; 1310ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Initialize COM/APPn processing. 1311ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * By default, we examine and then discard APP0 and APP14, 1312ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * but simply discard COM and all other APPn. 1313ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1314ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_COM = skip_variable; 1315ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->length_limit_COM = 0; 1316ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov for (i = 0; i < 16; i++) { 1317ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_APPn[i] = skip_variable; 1318ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->length_limit_APPn[i] = 0; 1319ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1320ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_APPn[0] = get_interesting_appn; 1321ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_APPn[14] = get_interesting_appn; 1322ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reset marker processing state */ 1323ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov reset_marker_reader(cinfo); 1324ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1325ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1326ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1327ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1328ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Control saving of COM and APPn markers into marker_list. 1329ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1330ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1331ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef SAVE_MARKERS_SUPPORTED 1332ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1333ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovGLOBAL(void) 1334ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovjpeg_save_markers (j_decompress_ptr cinfo, int marker_code, 1335ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov unsigned int length_limit) 1336ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 1337ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 1338ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov long maxlength; 1339ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_marker_parser_method processor; 1340ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1341ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Length limit mustn't be larger than what we can allocate 1342ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * (should only be a concern in a 16-bit environment). 1343ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1344ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov maxlength = cinfo->mem->max_alloc_chunk - SIZEOF(struct jpeg_marker_struct); 1345ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (((long) length_limit) > maxlength) 1346ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length_limit = (unsigned int) maxlength; 1347ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1348ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Choose processor routine to use. 1349ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * APP0/APP14 have special requirements. 1350ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1351ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (length_limit) { 1352ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov processor = save_marker; 1353ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* If saving APP0/APP14, save at least enough for our internal use. */ 1354ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (marker_code == (int) M_APP0 && length_limit < APP0_DATA_LEN) 1355ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length_limit = APP0_DATA_LEN; 1356ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else if (marker_code == (int) M_APP14 && length_limit < APP14_DATA_LEN) 1357ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov length_limit = APP14_DATA_LEN; 1358ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else { 1359ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov processor = skip_variable; 1360ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* If discarding APP0/APP14, use our regular on-the-fly processor. */ 1361ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (marker_code == (int) M_APP0 || marker_code == (int) M_APP14) 1362ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov processor = get_interesting_appn; 1363ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } 1364ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1365ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (marker_code == (int) M_COM) { 1366ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_COM = processor; 1367ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->length_limit_COM = length_limit; 1368ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15) { 1369ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_APPn[marker_code - (int) M_APP0] = processor; 1370ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->length_limit_APPn[marker_code - (int) M_APP0] = length_limit; 1371ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } else 1372ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code); 1373ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1374ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1375ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* SAVE_MARKERS_SUPPORTED */ 1376ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1377ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1378ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* 1379ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov * Install a special processing method for COM or APPn markers. 1380ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov */ 1381ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1382ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovGLOBAL(void) 1383ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganovjpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code, 1384ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov jpeg_marker_parser_method routine) 1385ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov{ 1386ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 1387ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1388ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov if (marker_code == (int) M_COM) 1389ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_COM = routine; 1390ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15) 1391ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov marker->process_APPn[marker_code - (int) M_APP0] = routine; 1392ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov else 1393ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code); 1394ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov} 1395ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 1396ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif //_FX_JPEG_TURBO_ 1397