170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * jcmarker.c 370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Copyright (C) 1991-1998, Thomas G. Lane. 570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This file is part of the Independent JPEG Group's software. 670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * For conditions of distribution and use, see the accompanying README file. 770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This file contains routines to write JPEG datastream markers. 970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 1070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 1170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#define JPEG_INTERNALS 1270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#include "jinclude.h" 1370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#include "jpeglib.h" 1470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 1570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 1670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinetypedef enum { /* JPEG marker codes */ 1770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF0 = 0xc0, 1870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF1 = 0xc1, 1970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF2 = 0xc2, 2070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF3 = 0xc3, 2170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 2270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF5 = 0xc5, 2370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF6 = 0xc6, 2470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF7 = 0xc7, 2570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 2670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_JPG = 0xc8, 2770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF9 = 0xc9, 2870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF10 = 0xca, 2970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF11 = 0xcb, 3070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF13 = 0xcd, 3270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF14 = 0xce, 3370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOF15 = 0xcf, 3470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_DHT = 0xc4, 3670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_DAC = 0xcc, 3870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 3970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST0 = 0xd0, 4070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST1 = 0xd1, 4170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST2 = 0xd2, 4270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST3 = 0xd3, 4370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST4 = 0xd4, 4470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST5 = 0xd5, 4570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST6 = 0xd6, 4670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_RST7 = 0xd7, 4770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 4870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOI = 0xd8, 4970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_EOI = 0xd9, 5070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_SOS = 0xda, 5170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_DQT = 0xdb, 5270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_DNL = 0xdc, 5370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_DRI = 0xdd, 5470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_DHP = 0xde, 5570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_EXP = 0xdf, 5670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 5770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP0 = 0xe0, 5870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP1 = 0xe1, 5970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP2 = 0xe2, 6070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP3 = 0xe3, 6170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP4 = 0xe4, 6270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP5 = 0xe5, 6370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP6 = 0xe6, 6470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP7 = 0xe7, 6570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP8 = 0xe8, 6670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP9 = 0xe9, 6770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP10 = 0xea, 6870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP11 = 0xeb, 6970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP12 = 0xec, 7070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP13 = 0xed, 7170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP14 = 0xee, 7270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_APP15 = 0xef, 7370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 7470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_JPG0 = 0xf0, 7570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_JPG13 = 0xfd, 7670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_COM = 0xfe, 7770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 7870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_TEM = 0x01, 7970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 8070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine M_ERROR = 0x100 8170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} JPEG_MARKER; 8270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 8370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 8470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Private state */ 8570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 8670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinetypedef struct { 8770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine struct jpeg_marker_writer pub; /* public fields */ 8870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 8970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */ 9070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} my_marker_writer; 9170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 9270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinetypedef my_marker_writer * my_marker_ptr; 9370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 9470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 9570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 9670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Basic output routines. 9770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 9870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Note that we do not support suspension while writing a marker. 9970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Therefore, an application using suspension must ensure that there is 10070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * enough buffer space for the initial markers (typ. 600-700 bytes) before 10170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * calling jpeg_start_compress, and enough space to write the trailing EOI 10270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * (a few bytes) before calling jpeg_finish_compress. Multipass compression 10370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * modes are not supported at all with suspension, so those two are the only 10470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * points where markers will be written. 10570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 10670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 10770a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 10870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_byte (j_compress_ptr cinfo, int val) 10970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a byte */ 11070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 11170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine struct jpeg_destination_mgr * dest = cinfo->dest; 11270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 11370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine *(dest->next_output_byte)++ = (JOCTET) val; 11470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (--dest->free_in_buffer == 0) { 11570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! (*dest->empty_output_buffer) (cinfo)) 11670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_CANT_SUSPEND); 11770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 11870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 11970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 12070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 12170a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 12270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_marker (j_compress_ptr cinfo, JPEG_MARKER mark) 12370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a marker code */ 12470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 12570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0xFF); 12670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (int) mark); 12770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 12870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 12970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 13070a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 13170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_2bytes (j_compress_ptr cinfo, int value) 13270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a 2-byte integer; these are always MSB first in JPEG files */ 13370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 13470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (value >> 8) & 0xFF); 13570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, value & 0xFF); 13670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 13770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 13870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 13970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 14070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Routines to write specific marker types. 14170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 14270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 14370a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(int) 14470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_dqt (j_compress_ptr cinfo, int index) 14570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a DQT marker */ 14670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */ 14770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 14870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine JQUANT_TBL * qtbl = cinfo->quant_tbl_ptrs[index]; 14970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int prec; 15070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int i; 15170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 15270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (qtbl == NULL) 15370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, index); 15470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 15570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine prec = 0; 15670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < DCTSIZE2; i++) { 15770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (qtbl->quantval[i] > 255) 15870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine prec = 1; 15970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 16070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 16170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! qtbl->sent_table) { 16270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_DQT); 16370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 16470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, prec ? DCTSIZE2*2 + 1 + 2 : DCTSIZE2 + 1 + 2); 16570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 16670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, index + (prec<<4)); 16770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 16870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < DCTSIZE2; i++) { 16970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* The table entries must be emitted in zigzag order. */ 17070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine unsigned int qval = qtbl->quantval[jpeg_natural_order[i]]; 17170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (prec) 17270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (int) (qval >> 8)); 17370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (int) (qval & 0xFF)); 17470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 17570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 17670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine qtbl->sent_table = TRUE; 17770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 17870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 17970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine return prec; 18070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 18170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 18270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 18370a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 18470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_dht (j_compress_ptr cinfo, int index, boolean is_ac) 18570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a DHT marker */ 18670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 18770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine JHUFF_TBL * htbl; 18870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int length, i; 18970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 19070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (is_ac) { 19170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine htbl = cinfo->ac_huff_tbl_ptrs[index]; 19270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine index += 0x10; /* output index has AC bit set */ 19370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 19470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine htbl = cinfo->dc_huff_tbl_ptrs[index]; 19570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 19670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 19770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (htbl == NULL) 19870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, index); 19970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 20070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! htbl->sent_table) { 20170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_DHT); 20270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 20370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine length = 0; 20470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 1; i <= 16; i++) 20570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine length += htbl->bits[i]; 20670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 20770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, length + 2 + 1 + 16); 20870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, index); 20970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 21070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 1; i <= 16; i++) 21170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, htbl->bits[i]); 21270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 21370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < length; i++) 21470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, htbl->huffval[i]); 21570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 21670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine htbl->sent_table = TRUE; 21770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 21870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 21970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 22070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 22170a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 22270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_dac (j_compress_ptr cinfo) 22370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a DAC marker */ 22470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Since the useful info is so small, we want to emit all the tables in */ 22570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* one DAC marker. Therefore this routine does its own scan of the table. */ 22670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 22770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#ifdef C_ARITH_CODING_SUPPORTED 22870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine char dc_in_use[NUM_ARITH_TBLS]; 22970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine char ac_in_use[NUM_ARITH_TBLS]; 23070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int length, i; 23170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 23270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 23370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < NUM_ARITH_TBLS; i++) 23470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine dc_in_use[i] = ac_in_use[i] = 0; 23570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 23670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < cinfo->comps_in_scan; i++) { 23770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr = cinfo->cur_comp_info[i]; 23870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine dc_in_use[compptr->dc_tbl_no] = 1; 23970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ac_in_use[compptr->ac_tbl_no] = 1; 24070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 24170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 24270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine length = 0; 24370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < NUM_ARITH_TBLS; i++) 24470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine length += dc_in_use[i] + ac_in_use[i]; 24570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 24670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_DAC); 24770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 24870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, length*2 + 2); 24970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 25070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < NUM_ARITH_TBLS; i++) { 25170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (dc_in_use[i]) { 25270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, i); 25370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4)); 25470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 25570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (ac_in_use[i]) { 25670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, i + 0x10); 25770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->arith_ac_K[i]); 25870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 25970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 26070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine#endif /* C_ARITH_CODING_SUPPORTED */ 26170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 26270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 26370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 26470a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 26570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_dri (j_compress_ptr cinfo) 26670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a DRI marker */ 26770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 26870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_DRI); 26970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 27070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 4); /* fixed length */ 27170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 27270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, (int) cinfo->restart_interval); 27370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 27470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 27570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 27670a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 27770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_sof (j_compress_ptr cinfo, JPEG_MARKER code) 27870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a SOF marker */ 27970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 28070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int ci; 28170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 28270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 28370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, code); 28470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 28570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */ 28670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 28770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Make sure image isn't bigger than SOF field can handle */ 28870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if ((long) cinfo->image_height > 65535L || 28970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (long) cinfo->image_width > 65535L) 29070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) 65535); 29170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 29270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->data_precision); 29370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, (int) cinfo->image_height); 29470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, (int) cinfo->image_width); 29570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 29670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->num_components); 29770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 29870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 29970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ci++, compptr++) { 30070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, compptr->component_id); 30170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (compptr->h_samp_factor << 4) + compptr->v_samp_factor); 30270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, compptr->quant_tbl_no); 30370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 30470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 30570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 30670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 30770a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 30870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_sos (j_compress_ptr cinfo) 30970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a SOS marker */ 31070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 31170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int i, td, ta; 31270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 31370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 31470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_SOS); 31570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 31670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */ 31770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 31870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->comps_in_scan); 31970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 32070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < cinfo->comps_in_scan; i++) { 32170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr = cinfo->cur_comp_info[i]; 32270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, compptr->component_id); 32370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine td = compptr->dc_tbl_no; 32470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ta = compptr->ac_tbl_no; 32570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progressive_mode) { 32670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Progressive mode: only DC or only AC tables are used in one scan; 32770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * furthermore, Huffman coding of DC refinement uses no table at all. 32870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * We emit 0 for unused field(s); this is recommended by the P&M text 32970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * but does not seem to be specified in the standard. 33070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 33170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->Ss == 0) { 33270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ta = 0; /* DC scan */ 33370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->Ah != 0 && !cinfo->arith_code) 33470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine td = 0; /* no DC table either */ 33570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 33670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine td = 0; /* AC scan */ 33770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 33870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 33970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (td << 4) + ta); 34070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 34170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 34270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->Ss); 34370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->Se); 34470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, (cinfo->Ah << 4) + cinfo->Al); 34570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 34670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 34770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 34870a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 34970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_jfif_app0 (j_compress_ptr cinfo) 35070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit a JFIF-compliant APP0 marker */ 35170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 35270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* 35370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Length of APP0 block (2 bytes) 35470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Block ID (4 bytes - ASCII "JFIF") 35570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Zero byte (1 byte to terminate the ID string) 35670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Version Major, Minor (2 bytes - major first) 35770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Units (1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm) 35870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Xdpu (2 bytes - dots per unit horizontal) 35970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Ydpu (2 bytes - dots per unit vertical) 36070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Thumbnail X size (1 byte) 36170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Thumbnail Y size (1 byte) 36270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 36370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 36470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_APP0); 36570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 36670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */ 36770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 36870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x4A); /* Identifier: ASCII "JFIF" */ 36970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x46); 37070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x49); 37170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x46); 37270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0); 37370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */ 37470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->JFIF_minor_version); 37570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */ 37670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, (int) cinfo->X_density); 37770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, (int) cinfo->Y_density); 37870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0); /* No thumbnail image */ 37970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0); 38070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 38170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 38270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 38370a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineLOCAL(void) 38470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkineemit_adobe_app14 (j_compress_ptr cinfo) 38570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit an Adobe APP14 marker */ 38670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 38770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* 38870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Length of APP14 block (2 bytes) 38970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Block ID (5 bytes - ASCII "Adobe") 39070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Version Number (2 bytes - currently 100) 39170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Flags0 (2 bytes - currently 0) 39270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Flags1 (2 bytes - currently 0) 39370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Color transform (1 byte) 39470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 39570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Although Adobe TN 5116 mentions Version = 101, all the Adobe files 39670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * now in circulation seem to use Version = 100, so that's what we write. 39770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * 39870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * We write the color transform byte as 1 if the JPEG color space is 39970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * YCbCr, 2 if it's YCCK, 0 otherwise. Adobe's definition has to do with 40070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * whether the encoder performed a transformation, which is pretty useless. 40170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 40270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 40370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_APP14); 40470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 40570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 2 + 5 + 2 + 2 + 2 + 1); /* length */ 40670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 40770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x41); /* Identifier: ASCII "Adobe" */ 40870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x64); 40970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x6F); 41070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x62); 41170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0x65); 41270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 100); /* Version */ 41370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 0); /* Flags0 */ 41470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, 0); /* Flags1 */ 41570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine switch (cinfo->jpeg_color_space) { 41670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case JCS_YCbCr: 41770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 1); /* Color transform = 1 */ 41870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 41970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine case JCS_YCCK: 42070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 2); /* Color transform = 2 */ 42170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 42270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine default: 42370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, 0); /* Color transform = 0 */ 42470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine break; 42570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 42670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 42770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 42870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 42970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 43070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * These routines allow writing an arbitrary marker with parameters. 43170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * The only intended use is to emit COM or APPn markers after calling 43270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * write_file_header and before calling write_frame_header. 43370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Other uses are not guaranteed to produce desirable results. 43470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Counting the parameter bytes properly is the caller's responsibility. 43570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 43670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 43770a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 43870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen) 43970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit an arbitrary marker header */ 44070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 44170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (datalen > (unsigned int) 65533) /* safety check */ 44270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ERREXIT(cinfo, JERR_BAD_LENGTH); 44370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 44470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, (JPEG_MARKER) marker); 44570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 44670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_2bytes(cinfo, (int) (datalen + 2)); /* total length */ 44770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 44870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 44970a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 45070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_marker_byte (j_compress_ptr cinfo, int val) 45170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* Emit one byte of marker parameters following write_marker_header */ 45270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 45370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_byte(cinfo, val); 45470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 45570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 45670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 45770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 45870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Write datastream header. 45970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This consists of an SOI and optional APPn markers. 46070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * We recommend use of the JFIF marker, but not the Adobe marker, 46170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * when using YCbCr or grayscale data. The JFIF marker should NOT 46270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * be used for any other JPEG colorspace. The Adobe marker is helpful 46370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * to distinguish RGB, CMYK, and YCCK colorspaces. 46470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Note that an application can write additional header markers after 46570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * jpeg_start_compress returns. 46670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 46770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 46870a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 46970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_file_header (j_compress_ptr cinfo) 47070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 47170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 47270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 47370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_SOI); /* first the SOI */ 47470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 47570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* SOI is defined to reset restart interval to 0 */ 47670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->last_restart_interval = 0; 47770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 47870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->write_JFIF_header) /* next an optional JFIF APP0 */ 47970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_jfif_app0(cinfo); 48070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */ 48170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_adobe_app14(cinfo); 48270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 48370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 48470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 48570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 48670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Write frame header. 48770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This consists of DQT and SOFn markers. 48870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Note that we do not emit the SOF until we have emitted the DQT(s). 48970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This avoids compatibility problems with incorrect implementations that 49070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * try to error-check the quant table numbers as soon as they see the SOF. 49170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 49270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 49370a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 49470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_frame_header (j_compress_ptr cinfo) 49570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 49670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int ci, prec; 49770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine boolean is_baseline; 49870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 49970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 50070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Emit DQT for each quantization table. 50170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Note that emit_dqt() suppresses any duplicate tables. 50270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 50370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine prec = 0; 50470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 50570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ci++, compptr++) { 50670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine prec += emit_dqt(cinfo, compptr->quant_tbl_no); 50770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 50870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* now prec is nonzero iff there are any 16-bit quant tables. */ 50970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 51070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Check for a non-baseline specification. 51170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Note we assume that Huffman table numbers won't be changed later. 51270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 51370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->arith_code || cinfo->progressive_mode || 51470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->data_precision != 8) { 51570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine is_baseline = FALSE; 51670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 51770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine is_baseline = TRUE; 51870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; 51970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine ci++, compptr++) { 52070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (compptr->dc_tbl_no > 1 || compptr->ac_tbl_no > 1) 52170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine is_baseline = FALSE; 52270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 52370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (prec && is_baseline) { 52470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine is_baseline = FALSE; 52570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* If it's baseline except for quantizer size, warn the user */ 52670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine TRACEMS(cinfo, 0, JTRC_16BIT_TABLES); 52770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 52870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 52970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 53070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Emit the proper SOF marker */ 53170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->arith_code) { 53270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_sof(cinfo, M_SOF9); /* SOF code for arithmetic coding */ 53370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 53470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progressive_mode) 53570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_sof(cinfo, M_SOF2); /* SOF code for progressive Huffman */ 53670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine else if (is_baseline) 53770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_sof(cinfo, M_SOF0); /* SOF code for baseline implementation */ 53870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine else 53970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_sof(cinfo, M_SOF1); /* SOF code for non-baseline Huffman file */ 54070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 54170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 54270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 54370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 54470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 54570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Write scan header. 54670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This consists of DHT or DAC markers, optional DRI, and SOS. 54770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Compressed data will be written following the SOS. 54870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 54970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 55070a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 55170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_scan_header (j_compress_ptr cinfo) 55270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 55370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_marker_ptr marker = (my_marker_ptr) cinfo->marker; 55470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int i; 55570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine jpeg_component_info *compptr; 55670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 55770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->arith_code) { 55870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Emit arith conditioning info. We may have some duplication 55970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * if the file has multiple scans, but it's so small it's hardly 56070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * worth worrying about. 56170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 56270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dac(cinfo); 56370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 56470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Emit Huffman tables. 56570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Note that emit_dht() suppresses any duplicate tables. 56670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 56770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < cinfo->comps_in_scan; i++) { 56870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine compptr = cinfo->cur_comp_info[i]; 56970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->progressive_mode) { 57070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Progressive mode: only DC or only AC tables are used in one scan */ 57170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->Ss == 0) { 57270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->Ah == 0) /* DC needs no table for refinement scan */ 57370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dht(cinfo, compptr->dc_tbl_no, FALSE); 57470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 57570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dht(cinfo, compptr->ac_tbl_no, TRUE); 57670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 57770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } else { 57870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Sequential mode: need both DC and AC tables */ 57970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dht(cinfo, compptr->dc_tbl_no, FALSE); 58070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dht(cinfo, compptr->ac_tbl_no, TRUE); 58170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 58270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 58370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 58470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 58570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Emit DRI if required --- note that DRI value could change for each scan. 58670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * We avoid wasting space with unnecessary DRIs, however. 58770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 58870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->restart_interval != marker->last_restart_interval) { 58970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dri(cinfo); 59070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->last_restart_interval = cinfo->restart_interval; 59170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 59270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 59370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_sos(cinfo); 59470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 59570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 59670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 59770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 59870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Write datastream trailer. 59970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 60070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 60170a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 60270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_file_trailer (j_compress_ptr cinfo) 60370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 60470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_EOI); 60570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 60670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 60770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 60870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 60970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Write an abbreviated table-specification datastream. 61070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * This consists of SOI, DQT and DHT tables, and EOI. 61170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Any table that is defined and not marked sent_table = TRUE will be 61270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * emitted. Note that all tables will be marked sent_table = TRUE at exit. 61370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 61470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 61570a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineMETHODDEF(void) 61670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinewrite_tables_only (j_compress_ptr cinfo) 61770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 61870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine int i; 61970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 62070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_SOI); 62170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 62270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < NUM_QUANT_TBLS; i++) { 62370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->quant_tbl_ptrs[i] != NULL) 62470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (void) emit_dqt(cinfo, i); 62570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 62670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 62770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (! cinfo->arith_code) { 62870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine for (i = 0; i < NUM_HUFF_TBLS; i++) { 62970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->dc_huff_tbl_ptrs[i] != NULL) 63070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dht(cinfo, i, FALSE); 63170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine if (cinfo->ac_huff_tbl_ptrs[i] != NULL) 63270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_dht(cinfo, i, TRUE); 63370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 63470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine } 63570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 63670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine emit_marker(cinfo, M_EOI); 63770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 63870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 63970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 64070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine/* 64170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine * Initialize the marker writer module. 64270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine */ 64370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 64470a18cd874a22452aca9e39e22275ed4538ed20bVladimir ChtchetkineGLOBAL(void) 64570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkinejinit_marker_writer (j_compress_ptr cinfo) 64670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine{ 64770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine my_marker_ptr marker; 64870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine 64970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Create the subobject */ 65070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker = (my_marker_ptr) 65170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 65270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine SIZEOF(my_marker_writer)); 65370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine cinfo->marker = (struct jpeg_marker_writer *) marker; 65470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Initialize method pointers */ 65570a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_file_header = write_file_header; 65670a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_frame_header = write_frame_header; 65770a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_scan_header = write_scan_header; 65870a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_file_trailer = write_file_trailer; 65970a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_tables_only = write_tables_only; 66070a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_marker_header = write_marker_header; 66170a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->pub.write_marker_byte = write_marker_byte; 66270a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine /* Initialize private state */ 66370a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine marker->last_restart_interval = 0; 66470a18cd874a22452aca9e39e22275ed4538ed20bVladimir Chtchetkine} 665