590 lines
15 KiB
C
590 lines
15 KiB
C
/*
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$Log: S:\oiwh\jpeg1\jwrjfif.c_v $
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*
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* Rev 1.2 08 Nov 1995 08:49:12 JAR
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* removed the calls to the IMGGetTaskData and replaced this global data variable
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* access method with the Thread Local Storage method
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*
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* Rev 1.1 10 May 1995 15:11:46 HEIDI
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*
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* added in changes from original jpeg source
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*
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* Rev 1.0 02 May 1995 16:17:44 JAR
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* Initial entry
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*
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* Rev 1.0 02 May 1995 15:58:10 JAR
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* Initial entry
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*/
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/*
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* jwrjfif.c
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*
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* Copyright (C) 1991, 1992, Thomas G. Lane.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains routines to write standard JPEG file headers/markers.
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* The file format created is a raw JPEG data stream with (optionally) an
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* APP0 marker per the JFIF spec. This will handle baseline and
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* JFIF-convention JPEG files, although there is currently no provision
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* for inserting a thumbnail image in the JFIF header.
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*
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* These routines may need modification for non-Unix environments or
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* specialized applications. As they stand, they assume output to
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* an ordinary stdio stream. However, the changes to write to something
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* else are localized in the macros appearing just below.
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*
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* These routines are invoked via the methods write_file_header,
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* write_scan_header, write_jpeg_data, write_scan_trailer, and
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* write_file_trailer.
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*/
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#include "windows.h"
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#include "jinclude.h"
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// 9505.02 jar
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#define LOCAL static /* a function used only in its module */
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// 9509.21 jar get the static memory token!
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extern DWORD dwTlsIndex;
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void emit_byte(int x);
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void flush_bytes(void);
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LOCAL void emit_extra (compress_info_ptr cinfo);
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EXTERN void jfree_large PP((void FAR * object));
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// 9504.26 jar the new global static structure => HLLN
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#include "jglobstr.h"
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#include "taskdata.h"
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// 9504.27 jar that HLLN stuff!
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//extern int total_rows_read;
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//extern int last_strip_jpeg;
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//extern char FAR *header_ptr_c;
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#ifdef JFIF_SUPPORTED
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/*
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* To output to something other than a stdio stream, you'd need to redefine
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* these macros.
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*/
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/* Write a single byte */
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/*#define emit_byte(cinfo,x) putc((x), cinfo->output_file) */
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/* Write some bytes from a (char *) buffer */
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#define WRITE_BYTES(cinfo,dataptr,datacount) \
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{ if (JFWRITE(cinfo->output_file, dataptr, datacount) \
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!= (size_t) (datacount)) \
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ERREXIT(cinfo->emethods, "Output file write error"); }
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/* Clean up and verify successful output */
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#define CHECK_OUTPUT(cinfo) \
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{ fflush(cinfo->output_file); \
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if (ferror(cinfo->output_file)) \
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ERREXIT(cinfo->emethods, "Output file write error"); }
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/* End of stdio-specific code. */
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typedef enum { /* JPEG marker codes */
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M_SOF0 = 0xc0,
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M_SOF1 = 0xc1,
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M_SOF2 = 0xc2,
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M_SOF3 = 0xc3,
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M_SOF5 = 0xc5,
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M_SOF6 = 0xc6,
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M_SOF7 = 0xc7,
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M_JPG = 0xc8,
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M_SOF9 = 0xc9,
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M_SOF10 = 0xca,
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M_SOF11 = 0xcb,
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M_SOF13 = 0xcd,
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M_SOF14 = 0xce,
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M_SOF15 = 0xcf,
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M_DHT = 0xc4,
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M_DAC = 0xcc,
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M_RST0 = 0xd0,
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M_RST1 = 0xd1,
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M_RST2 = 0xd2,
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M_RST3 = 0xd3,
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M_RST4 = 0xd4,
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M_RST5 = 0xd5,
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M_RST6 = 0xd6,
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M_RST7 = 0xd7,
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M_SOI = 0xd8,
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M_EOI = 0xd9,
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M_SOS = 0xda,
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M_DQT = 0xdb,
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M_DNL = 0xdc,
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M_DRI = 0xdd,
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M_DHP = 0xde,
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M_EXP = 0xdf,
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M_APP0 = 0xe0,
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M_APP15 = 0xef,
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M_JPG0 = 0xf0,
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M_JPG13 = 0xfd,
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M_COM = 0xfe,
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M_TEM = 0x01,
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M_ERROR = 0x100
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} JPEG_MARKER;
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LOCAL void
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emit_marker (compress_info_ptr cinfo, JPEG_MARKER mark)
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/* Emit a marker code */
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{
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emit_byte(0xFF);
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emit_byte(mark);
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}
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LOCAL void
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emit_2bytes (compress_info_ptr cinfo, int value)
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/* Emit a 2-byte integer; these are always MSB first in JPEG files */
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{
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emit_byte((value >> 8) & 0xFF);
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emit_byte(value & 0xFF);
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}
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LOCAL int
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emit_dqt (compress_info_ptr cinfo, int index)
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/* Emit a DQT marker */
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/* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */
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{
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QUANT_TBL_PTR data = cinfo->quant_tbl_ptrs[index];
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int prec = 0;
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int i;
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for (i = 0; i < DCTSIZE2; i++) {
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if (data[i] > 255)
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prec = 1;
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}
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emit_marker(cinfo, M_DQT);
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emit_2bytes(cinfo, prec ? DCTSIZE2*2 + 1 + 2 : DCTSIZE2 + 1 + 2);
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emit_byte(index + (prec<<4));
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for (i = 0; i < DCTSIZE2; i++) {
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if (prec)
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emit_byte( data[i] >> 8);
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emit_byte(data[i] & 0xFF);
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}
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return prec;
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}
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LOCAL void
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emit_dht (compress_info_ptr cinfo, int index, boolean is_ac)
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/* Emit a DHT marker */
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{
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HUFF_TBL FAR * htbl;
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int length, i;
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if (is_ac) {
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htbl = cinfo->ac_huff_tbl_ptrs[index];
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index += 0x10; /* output index has AC bit set */
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} else {
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htbl = cinfo->dc_huff_tbl_ptrs[index];
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}
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if (htbl == NULL)
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ERREXIT1(cinfo->emethods, "Huffman table 0x%02x was not defined", index);
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if (! htbl->sent_table) {
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emit_marker(cinfo, M_DHT);
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length = 0;
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for (i = 1; i <= 16; i++)
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length += htbl->bits[i];
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emit_2bytes(cinfo, length + 2 + 1 + 16);
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emit_byte(index);
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for (i = 1; i <= 16; i++)
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emit_byte(htbl->bits[i]);
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for (i = 0; i < length; i++)
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emit_byte(htbl->huffval[i]);
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htbl->sent_table = TRUE;
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}
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}
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LOCAL void
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emit_dac (compress_info_ptr cinfo)
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/* Emit a DAC marker */
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/* Since the useful info is so small, we want to emit all the tables in */
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/* one DAC marker. Therefore this routine does its own scan of the table. */
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{
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char dc_in_use[NUM_ARITH_TBLS];
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char ac_in_use[NUM_ARITH_TBLS];
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int length, i;
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for (i = 0; i < NUM_ARITH_TBLS; i++)
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dc_in_use[i] = ac_in_use[i] = 0;
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for (i = 0; i < cinfo->num_components; i++) {
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dc_in_use[cinfo->comp_info[i].dc_tbl_no] = 1;
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ac_in_use[cinfo->comp_info[i].ac_tbl_no] = 1;
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}
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length = 0;
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for (i = 0; i < NUM_ARITH_TBLS; i++)
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length += dc_in_use[i] + ac_in_use[i];
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emit_marker(cinfo, M_DAC);
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emit_2bytes(cinfo, length*2 + 2);
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for (i = 0; i < NUM_ARITH_TBLS; i++) {
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if (dc_in_use[i]) {
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emit_byte(i);
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emit_byte(cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4));
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}
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if (ac_in_use[i]) {
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emit_byte(i + 0x10);
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emit_byte(cinfo->arith_ac_K[i]);
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}
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}
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}
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LOCAL void
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emit_dri (compress_info_ptr cinfo)
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/* Emit a DRI marker */
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{
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emit_marker(cinfo, M_DRI);
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emit_2bytes(cinfo, 4); /* fixed length */
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emit_2bytes(cinfo, (int) cinfo->restart_interval);
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}
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LOCAL void
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emit_sof (compress_info_ptr cinfo, JPEG_MARKER code)
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/* Emit a SOF marker */
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{
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int i;
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emit_marker(cinfo, code);
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emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */
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if (cinfo->image_height > 65535L || cinfo->image_width > 65535L)
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ERREXIT(cinfo->emethods, "Maximum image dimension for JFIF is 65535 pixels");
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emit_byte( cinfo->data_precision);
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emit_2bytes(cinfo, (int) cinfo->image_height);
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emit_2bytes(cinfo, (int) cinfo->image_width);
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emit_byte(cinfo->num_components);
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for (i = 0; i < cinfo->num_components; i++) {
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emit_byte(cinfo->comp_info[i].component_id);
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emit_byte((cinfo->comp_info[i].h_samp_factor << 4)
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+ cinfo->comp_info[i].v_samp_factor);
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emit_byte(cinfo->comp_info[i].quant_tbl_no);
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}
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}
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GLOBAL void
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emit_sos (compress_info_ptr cinfo)
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/* Emit a SOS marker */
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{
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int i;
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emit_marker(cinfo, M_SOS);
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emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */
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emit_byte(cinfo->comps_in_scan);
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for (i = 0; i < cinfo->comps_in_scan; i++) {
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emit_byte(cinfo->cur_comp_info[i]->component_id);
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emit_byte((cinfo->cur_comp_info[i]->dc_tbl_no << 4)
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+ cinfo->cur_comp_info[i]->ac_tbl_no);
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}
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emit_byte(0); /* Spectral selection start */
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emit_byte(DCTSIZE2-1); /* Spectral selection end */
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emit_byte(0); /* Successive approximation */
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}
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LOCAL void
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emit_extra (compress_info_ptr cinfo)
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{
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// 9509.21 jar use Thread Local Storage to manage JPEG Globals
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LPOI_JPEG_GLOBALS_STRUCT lpJCmpGlobal;
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lpJCmpGlobal = ( LPOI_JPEG_GLOBALS_STRUCT)TlsGetValue( dwTlsIndex);
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// 9509.21 jar if null, we'll alloc and set for this thread
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if ( lpJCmpGlobal == NULL)
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{
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lpJCmpGlobal = ( LPOI_JPEG_GLOBALS_STRUCT)LocalAlloc( LPTR,
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sizeof( OI_JPEG_GLOBALS_STRUCT));
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if (lpJCmpGlobal != NULL)
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{
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TlsSetValue( dwTlsIndex, lpJCmpGlobal);
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}
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}
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emit_marker (cinfo, M_COM);
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emit_2bytes(cinfo, 2 + 4 + 1 + 1);
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emit_byte ( 0x57);
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emit_byte ( 0x41);
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emit_byte ( 0x4E);
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emit_byte ( 0x47);
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emit_byte ( (char) lpJCmpGlobal->jpeg_quality);
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emit_byte ( (char) lpJCmpGlobal->sub_sampling_factor);
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}
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LOCAL void
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emit_jfif_app0 (compress_info_ptr cinfo)
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/* Emit a JFIF-compliant APP0 marker */
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{
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/*
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* Length of APP0 block (2 bytes)
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* Block ID (4 bytes - ASCII "JFIF")
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* Zero byte (1 byte to terminate the ID string)
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* Version Major, Minor (2 bytes - 0x01, 0x01)
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* Units (1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm)
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* Xdpu (2 bytes - dots per unit horizontal)
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* Ydpu (2 bytes - dots per unit vertical)
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* Thumbnail X size (1 byte)
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* Thumbnail Y size (1 byte)
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*/
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emit_marker(cinfo, M_APP0);
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emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */
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emit_byte(0x4A); /* Identifier: ASCII "JFIF" */
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emit_byte(0x46);
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emit_byte(0x49);
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emit_byte(0x46);
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emit_byte(0);
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emit_byte(1); /* Major version */
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emit_byte(1); /* Minor version */
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emit_byte(cinfo->density_unit); /* Pixel size information */
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emit_2bytes(cinfo, (int) cinfo->X_density);
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emit_2bytes(cinfo, (int) cinfo->Y_density);
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emit_byte(0); /* No thumbnail image */
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emit_byte(0);
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}
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/*
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* Write the file header.
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*/
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METHODDEF void
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write_file_header (compress_info_ptr cinfo)
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{
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char qt_in_use[NUM_QUANT_TBLS];
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int i, prec;
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boolean is_baseline;
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emit_marker(cinfo, M_SOI); /* first the SOI */
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/* Added quality and sub sampling parameters in the jpeg header */
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emit_extra (cinfo);
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/* Removed from our release
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if (cinfo->write_JFIF_header) next an optional JFIF APP0
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emit_jfif_app0(cinfo); */
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/* Emit DQT for each quantization table. */
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/* Note that doing it here means we can't adjust the QTs on-the-fly. */
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/* If we did want to do that, we'd have a problem with checking precision */
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/* for the is_baseline determination. */
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for (i = 0; i < NUM_QUANT_TBLS; i++)
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qt_in_use[i] = 0;
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for (i = 0; i < cinfo->num_components; i++)
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qt_in_use[cinfo->comp_info[i].quant_tbl_no] = 1;
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prec = 0;
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for (i = 0; i < NUM_QUANT_TBLS; i++) {
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if (qt_in_use[i])
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{
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prec += emit_dqt(cinfo, i);
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}
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}
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/* now prec is nonzero iff there are any 16-bit quant tables. */
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/* Check for a non-baseline specification. */
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/* Note we assume that Huffman table numbers won't be changed later. */
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is_baseline = TRUE;
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if (cinfo->arith_code || (cinfo->data_precision != 8))
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is_baseline = FALSE;
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for (i = 0; i < cinfo->num_components; i++) {
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if (cinfo->comp_info[i].dc_tbl_no > 1 || cinfo->comp_info[i].ac_tbl_no > 1)
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is_baseline = FALSE;
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}
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if (prec && is_baseline) {
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is_baseline = FALSE;
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/* If it's baseline except for quantizer size, warn the user */
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TRACEMS(cinfo->emethods, 0,
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"Caution: quantization tables are too coarse for baseline JPEG");
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}
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/* Emit the proper SOF marker */
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if (cinfo->arith_code)
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emit_sof(cinfo, M_SOF9); /* SOF code for arithmetic coding */
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else if (is_baseline)
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emit_sof(cinfo, M_SOF0); /* SOF code for baseline implementation */
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else
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emit_sof(cinfo, M_SOF1); /* SOF code for non-baseline Huffman file */
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}
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/*
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* Write the start of a scan (everything through the SOS marker).
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*/
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METHODDEF void
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write_scan_header (compress_info_ptr cinfo)
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{
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int i;
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if (cinfo->arith_code) {
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/* Emit arith conditioning info. We will have some duplication
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* if the file has multiple scans, but it's so small it's hardly
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* worth worrying about.
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*/
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emit_dac(cinfo);
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} else {
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/* Emit Huffman tables. Note that emit_dht takes care of
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* suppressing duplicate tables.
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*/
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for (i = 0; i < cinfo->comps_in_scan; i++) {
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emit_dht(cinfo, cinfo->cur_comp_info[i]->dc_tbl_no, FALSE);
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emit_dht(cinfo, cinfo->cur_comp_info[i]->ac_tbl_no, TRUE);
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}
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}
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/* Emit DRI if required --- note that DRI value could change for each scan.
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* If it doesn't, a tiny amount of space is wasted in multiple-scan files.
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* We assume DRI will never be nonzero for one scan and zero for a later one.
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*/
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if (cinfo->restart_interval)
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emit_dri(cinfo);
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// emit_sos(cinfo);
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}
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/*
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* Write some bytes of compressed data within a scan.
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*/
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METHODDEF void
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write_jpeg_data (compress_info_ptr cinfo, char *dataptr, int datacount)
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{
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int i;
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for (i = 0; i < datacount; i++)
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{
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emit_byte(*dataptr);
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dataptr++;
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}
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/* WRITE_BYTES(cinfo, dataptr, datacount); */
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}
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/*
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* Finish up after a compressed scan (series of write_jpeg_data calls).
|
|
*/
|
|
|
|
METHODDEF void
|
|
write_scan_trailer (compress_info_ptr cinfo)
|
|
{
|
|
/* no work needed in this format */
|
|
}
|
|
|
|
|
|
/*
|
|
* Finish up at the end of the file.
|
|
*/
|
|
|
|
METHODDEF void
|
|
write_file_trailer (compress_info_ptr cinfo)
|
|
{
|
|
// 9509.21 jar use Thread Local Storage to manage JPEG Globals
|
|
LPOI_JPEG_GLOBALS_STRUCT lpJCmpGlobal;
|
|
|
|
lpJCmpGlobal = ( LPOI_JPEG_GLOBALS_STRUCT)TlsGetValue( dwTlsIndex);
|
|
|
|
// 9509.21 jar if null, we'll alloc and set for this thread
|
|
if ( lpJCmpGlobal == NULL)
|
|
{
|
|
lpJCmpGlobal = ( LPOI_JPEG_GLOBALS_STRUCT)LocalAlloc( LPTR,
|
|
sizeof( OI_JPEG_GLOBALS_STRUCT));
|
|
if (lpJCmpGlobal != NULL)
|
|
{
|
|
TlsSetValue( dwTlsIndex, lpJCmpGlobal);
|
|
}
|
|
}
|
|
|
|
if (lpJCmpGlobal->last_strip_jpeg)
|
|
emit_marker(cinfo, M_EOI);
|
|
/* Make sure we wrote the output file OK */
|
|
lpJCmpGlobal->total_rows_read++; /* Increment rows read past the total rows */
|
|
flush_bytes();
|
|
/* Need to release jpeg header at the end of last strip */
|
|
if (lpJCmpGlobal->last_strip_jpeg)
|
|
/* jfree_small (lpJCmpGlobal->header_ptr_c); */
|
|
/* header_ptr_c contains the proper pointer to the jpeg header */
|
|
/* Do not depend on the application to keep the same pointer */
|
|
/* Header may have been moved around */
|
|
/* Release memory by using ptr_sav variable */
|
|
jfree_large (lpJCmpGlobal->ptr_sav);
|
|
|
|
/* CHECK_OUTPUT(cinfo); */
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* The method selection routine for standard JPEG header writing.
|
|
* This should be called from c_ui_method_selection if appropriate.
|
|
*/
|
|
|
|
GLOBAL void
|
|
jselwjfif (compress_info_ptr cinfo)
|
|
{
|
|
cinfo->methods->write_file_header = write_file_header;
|
|
cinfo->methods->write_scan_header = write_scan_header;
|
|
cinfo->methods->write_jpeg_data = write_jpeg_data;
|
|
cinfo->methods->write_scan_trailer = write_scan_trailer;
|
|
cinfo->methods->write_file_trailer = write_file_trailer;
|
|
}
|
|
|
|
#endif /* JFIF_SUPPORTED */
|