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The Independent JPEG Group's JPEG software v6a

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This commit is contained in:
Thomas G. Lane
1996-02-07 00:00:00 +00:00
committed by DRC
parent bc79e0680a
commit 489583f516
101 changed files with 2063 additions and 1296 deletions
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44
jcmarker.c
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@@ -1,7 +1,7 @@
/*
* jcmarker.c
*
* Copyright (C) 1991-1995, Thomas G. Lane.
* Copyright (C) 1991-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -93,7 +93,7 @@ typedef enum { /* JPEG marker codes */
* points where markers will be written.
*/
LOCAL void
LOCAL(void)
emit_byte (j_compress_ptr cinfo, int val)
/* Emit a byte */
{
@@ -107,7 +107,7 @@ emit_byte (j_compress_ptr cinfo, int val)
}
LOCAL void
LOCAL(void)
emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark)
/* Emit a marker code */
{
@@ -116,7 +116,7 @@ emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark)
}
LOCAL void
LOCAL(void)
emit_2bytes (j_compress_ptr cinfo, int value)
/* Emit a 2-byte integer; these are always MSB first in JPEG files */
{
@@ -129,7 +129,7 @@ emit_2bytes (j_compress_ptr cinfo, int value)
* Routines to write specific marker types.
*/
LOCAL int
LOCAL(int)
emit_dqt (j_compress_ptr cinfo, int index)
/* Emit a DQT marker */
/* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */
@@ -155,9 +155,11 @@ emit_dqt (j_compress_ptr cinfo, int index)
emit_byte(cinfo, index + (prec<<4));
for (i = 0; i < DCTSIZE2; i++) {
/* The table entries must be emitted in zigzag order. */
unsigned int qval = qtbl->quantval[jpeg_natural_order[i]];
if (prec)
emit_byte(cinfo, qtbl->quantval[i] >> 8);
emit_byte(cinfo, qtbl->quantval[i] & 0xFF);
emit_byte(cinfo, qval >> 8);
emit_byte(cinfo, qval & 0xFF);
}
qtbl->sent_table = TRUE;
@@ -167,7 +169,7 @@ emit_dqt (j_compress_ptr cinfo, int index)
}
LOCAL void
LOCAL(void)
emit_dht (j_compress_ptr cinfo, int index, boolean is_ac)
/* Emit a DHT marker */
{
@@ -205,7 +207,7 @@ emit_dht (j_compress_ptr cinfo, int index, boolean is_ac)
}
LOCAL void
LOCAL(void)
emit_dac (j_compress_ptr cinfo)
/* Emit a DAC marker */
/* Since the useful info is so small, we want to emit all the tables in */
@@ -248,7 +250,7 @@ emit_dac (j_compress_ptr cinfo)
}
LOCAL void
LOCAL(void)
emit_dri (j_compress_ptr cinfo)
/* Emit a DRI marker */
{
@@ -260,7 +262,7 @@ emit_dri (j_compress_ptr cinfo)
}
LOCAL void
LOCAL(void)
emit_sof (j_compress_ptr cinfo, JPEG_MARKER code)
/* Emit a SOF marker */
{
@@ -291,7 +293,7 @@ emit_sof (j_compress_ptr cinfo, JPEG_MARKER code)
}
LOCAL void
LOCAL(void)
emit_sos (j_compress_ptr cinfo)
/* Emit a SOS marker */
{
@@ -332,7 +334,7 @@ emit_sos (j_compress_ptr cinfo)
}
LOCAL void
LOCAL(void)
emit_jfif_app0 (j_compress_ptr cinfo)
/* Emit a JFIF-compliant APP0 marker */
{
@@ -370,7 +372,7 @@ emit_jfif_app0 (j_compress_ptr cinfo)
}
LOCAL void
LOCAL(void)
emit_adobe_app14 (j_compress_ptr cinfo)
/* Emit an Adobe APP14 marker */
{
@@ -424,7 +426,7 @@ emit_adobe_app14 (j_compress_ptr cinfo)
* Other uses are not guaranteed to produce desirable results.
*/
METHODDEF void
METHODDEF(void)
write_any_marker (j_compress_ptr cinfo, int marker,
const JOCTET *dataptr, unsigned int datalen)
/* Emit an arbitrary marker with parameters */
@@ -453,7 +455,7 @@ write_any_marker (j_compress_ptr cinfo, int marker,
* jpeg_start_compress returns.
*/
METHODDEF void
METHODDEF(void)
write_file_header (j_compress_ptr cinfo)
{
emit_marker(cinfo, M_SOI); /* first the SOI */
@@ -473,7 +475,7 @@ write_file_header (j_compress_ptr cinfo)
* try to error-check the quant table numbers as soon as they see the SOF.
*/
METHODDEF void
METHODDEF(void)
write_frame_header (j_compress_ptr cinfo)
{
int ci, prec;
@@ -530,7 +532,7 @@ write_frame_header (j_compress_ptr cinfo)
* Compressed data will be written following the SOS.
*/
METHODDEF void
METHODDEF(void)
write_scan_header (j_compress_ptr cinfo)
{
int i;
@@ -579,7 +581,7 @@ write_scan_header (j_compress_ptr cinfo)
* Write datastream trailer.
*/
METHODDEF void
METHODDEF(void)
write_file_trailer (j_compress_ptr cinfo)
{
emit_marker(cinfo, M_EOI);
@@ -593,7 +595,7 @@ write_file_trailer (j_compress_ptr cinfo)
* emitted. Note that all tables will be marked sent_table = TRUE at exit.
*/
METHODDEF void
METHODDEF(void)
write_tables_only (j_compress_ptr cinfo)
{
int i;
@@ -622,7 +624,7 @@ write_tables_only (j_compress_ptr cinfo)
* Initialize the marker writer module.
*/
GLOBAL void
GLOBAL(void)
jinit_marker_writer (j_compress_ptr cinfo)
{
/* Create the subobject */