667fb53e3f
Tag 1.4.1 release
* tag '1.4.1': (427 commits)
Now that the TurboJPEG API is reporting libjpeg warnings as errors, an "Invalid SOS parameters for sequential JPEG" warning surfaced in tjDecodeYUV*(). This was caused by the Se member of jpeg_decompress_struct being set to 0 (it is normally set to a non-zero value when the start-of-scan markers are read, but there are no SOS markers in this case, because we're not actually decompressing a JPEG file.)
Fix a segfault that occured in the MIPS DSPr2 fancy upsampling routine when downsampled_width==3. Because the DSPr2 code unrolls the loop for the middle columns (refer to jdsample.c), it has the effect of performing two column iterations, and that only works properly if the number of columns (minus the first and last) is >= 2. For the specific case of downsampled_width==3, this patch skips to the second iteration of the unrolled column loop.
If a warning (such as "Premature end of JPEG file") is triggered in the underlying libjpeg API, make sure that the TurboJPEG API function returns -1. Unlike errors, however, libjpeg warnings do not make the TurboJPEG functions abort.
Back out r1555 and r1548. Using setenv() didn't fix the iOS simulator issue. It just replaced an undefined _putenv$UNIX2003 symbol with an undefined _setenv$UNIX2003 symbol. The correct solution seems to be to use -D_NONSTD_SOURCE when generating our official builds.
Fix the Windows build. I remember now why I used putenv() originally-- because Windows doesn't have setenv(). We could use _putenv_s(), but older versions of MinGW don't have that either. Fortunately, since all of the environment values we're setting in turbojpeg.c are static, we can just map setenv() to putenv() using a macro. NOTE: we still have to use _putenv_s() in turbojpeg-jni.c, but at least people who may need to build with an older version of MinGW can still do so by disabling the Java build.
Allow building only static or only shared libraries on Windows
__WORDSIZE doesn't seem to be available on platforms other than Mac or Linux, and best practices are for user-level code not to rely on it anyhow, since it's meant to be an internal macro. Fortunately, autoconf already has a way of determining the word size at configure time, so it can be passed into the compiler. This should work on any platform and has been tested on all of the Un*x platforms we support (Linux, Mac, FreeBSD, Solaris.)
Unless you define _ANSI_SOURCE, then putenv() on Mac is renamed to putenv$UNIX2003(), and this causes problems when trying to link an i386 iOS application (for the simulator) against the TurboJPEG static library. It's easiest to just use setenv() instead.
Fix a bug in the 64-bit Huffman encoder that Google discovered when encoding some very specific (and proprietary) aerial images using quality=98, an optimized Huffman table, and the ISLOW DCT. These images were causing the Huffman bit buffer to overflow, because the code for encoding the DC coefficient was using the equivalent of the 32-bit version of EMIT_BITS(). Thus, when 64-bit code was used, the DC coefficient code was not properly checking how many bits were in the buffer before attempting to add more bits to it. This issue appears to have existed in all versions of libjpeg-turbo.
Restore backward compatibility with MSVC < 2010 (broken by r1541)
Oops. OS X doesn't define __WORDSIZE unless you include stdint.h, so apparently the Huffman codec hasn't ever been fully accelerated on 64-bit OS X.
Allow the executables and libraries outside of the sharedlib/ directory to be linked against msvcr*.dll instead of libcmt*.lib. This is reported to be necessary when building libjpeg-turbo for use with C#.
Surround the usage of getenv() in the TurboJPEG API with #ifndef NO_GETENV so that developers can add -DNO_GETENV to the C flags when building for platforms that don't have getenv(). Currently this is known to be necessary when building for Windows Phone.
If libjpeg-turbo is configured with a non-default prefix, such as /usr, then use the docdir variable defined by autoconf 2.60 and later, if available. This will, for instance, install the documentation under /usr/share/doc/libjpeg-turbo by default if prefix=/usr, unless docdir is overridden. When using earlier versions of autoconf, docdir is set to ${datadir}/doc, as it always has been.
Enable silent build rules for the NASM objects, if the source is configured with automake 1.11 or later. NOTE: the build still spits out "error: ignoring unknown tag NASM" for each object, but unfortunately, if we remove "--tag NASM" from the command line, the build breaks under older versions of automake (it aborts with "unable to infer tagged configuration.")
Set the RPM and deb architecture properly on non-x86 platforms.
Come on, Cohaagen, you got what you want. Give these people air!
Oops. Need to set the alpha channel when using TYPE_4BYTE_ABGR*. This has no bearing on the actual tests, but it prevents the PNG pre-encode reference images for those tests from being blank.
Oops. The MIPS SIMD implementations of h2v1 and h2v2 upsampling were not checking for DSPr2 support, so running 'djpeg -nosmooth' on a non-DSPr2-enabled platform caused an "illegal instruction" error.
Introduce fast paths to speed up NULL color conversion somewhat, particularly when using 64-bit code; on the decompression side, the "slow path" also now use an approach similar to that of the compression side (with the component loop outside of the column loop rather than inside.) This is faster when using 32-bit code.
...
980 lines
33 KiB
C
980 lines
33 KiB
C
/*
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* jcparam.c
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*
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* This file was part of the Independent JPEG Group's software:
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* Copyright (C) 1991-1998, Thomas G. Lane.
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* Modified 2003-2008 by Guido Vollbeding.
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* libjpeg-turbo Modifications:
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* Copyright (C) 2009-2011, D. R. Commander.
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* mozjpeg Modifications:
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* Copyright (C) 2014, Mozilla Corporation.
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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 optional default-setting code for the JPEG compressor.
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* Applications do not have to use this file, but those that don't use it
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* must know a lot more about the innards of the JPEG code.
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*/
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#define JPEG_INTERNALS
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#include "jinclude.h"
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#include "jpeglib.h"
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#include "jstdhuff.c"
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/*
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* Quantization table setup routines
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*/
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GLOBAL(void)
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jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
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const unsigned int *basic_table,
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int scale_factor, boolean force_baseline)
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/* Define a quantization table equal to the basic_table times
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* a scale factor (given as a percentage).
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* If force_baseline is TRUE, the computed quantization table entries
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* are limited to 1..255 for JPEG baseline compatibility.
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*/
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{
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JQUANT_TBL ** qtblptr;
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int i;
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long temp;
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/* Safety check to ensure start_compress not called yet. */
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if (cinfo->global_state != CSTATE_START)
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ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
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if (which_tbl < 0 || which_tbl >= NUM_QUANT_TBLS)
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ERREXIT1(cinfo, JERR_DQT_INDEX, which_tbl);
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qtblptr = & cinfo->quant_tbl_ptrs[which_tbl];
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if (*qtblptr == NULL)
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*qtblptr = jpeg_alloc_quant_table((j_common_ptr) cinfo);
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for (i = 0; i < DCTSIZE2; i++) {
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temp = ((long) basic_table[i] * scale_factor + 50L) / 100L;
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/* limit the values to the valid range */
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if (temp <= 0L) temp = 1L;
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if (temp > 32767L) temp = 32767L; /* max quantizer needed for 12 bits */
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if (force_baseline && temp > 255L)
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temp = 255L; /* limit to baseline range if requested */
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(*qtblptr)->quantval[i] = (UINT16) temp;
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}
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/* Initialize sent_table FALSE so table will be written to JPEG file. */
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(*qtblptr)->sent_table = FALSE;
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}
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/* These are the sample quantization tables given in JPEG spec section K.1.
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* The spec says that the values given produce "good" quality, and
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* when divided by 2, "very good" quality.
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*/
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static const unsigned int std_luminance_quant_tbl[9][DCTSIZE2] = {
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{
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/* JPEG Annex K
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*/
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16, 11, 10, 16, 24, 40, 51, 61,
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12, 12, 14, 19, 26, 58, 60, 55,
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14, 13, 16, 24, 40, 57, 69, 56,
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14, 17, 22, 29, 51, 87, 80, 62,
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18, 22, 37, 56, 68, 109, 103, 77,
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24, 35, 55, 64, 81, 104, 113, 92,
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49, 64, 78, 87, 103, 121, 120, 101,
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72, 92, 95, 98, 112, 100, 103, 99
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},
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{
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/* flat
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*/
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16
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},
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{
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12, 17, 20, 21, 30, 34, 56, 63,
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18, 20, 20, 26, 28, 51, 61, 55,
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19, 20, 21, 26, 33, 58, 69, 55,
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26, 26, 26, 30, 46, 87, 86, 66,
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31, 33, 36, 40, 46, 96, 100, 73,
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40, 35, 46, 62, 81, 100, 111, 91,
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46, 66, 76, 86, 102, 121, 120, 101,
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68, 90, 90, 96, 113, 102, 105, 103
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},
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{
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/* From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008
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*/
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16, 16, 16, 18, 25, 37, 56, 85,
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16, 17, 20, 27, 34, 40, 53, 75,
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16, 20, 24, 31, 43, 62, 91, 135,
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18, 27, 31, 40, 53, 74, 106, 156,
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25, 34, 43, 53, 69, 94, 131, 189,
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37, 40, 62, 74, 94, 124, 169, 238,
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56, 53, 91, 106, 131, 169, 226, 311,
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85, 75, 135, 156, 189, 238, 311, 418
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},
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{
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9, 10, 12, 14, 27, 32, 51, 62,
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11, 12, 14, 19, 27, 44, 59, 73,
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12, 14, 18, 25, 42, 59, 79, 78,
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17, 18, 25, 42, 61, 92, 87, 92,
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23, 28, 42, 75, 79, 112, 112, 99,
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40, 42, 59, 84, 88, 124, 132, 111,
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42, 64, 78, 95, 105, 126, 125, 99,
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70, 75, 100, 102, 116, 100, 107, 98
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},
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{
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/* Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
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*/
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10, 12, 14, 19, 26, 38, 57, 86,
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12, 18, 21, 28, 35, 41, 54, 76,
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14, 21, 25, 32, 44, 63, 92, 136,
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19, 28, 32, 41, 54, 75, 107, 157,
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26, 35, 44, 54, 70, 95, 132, 190,
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38, 41, 63, 75, 95, 125, 170, 239,
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57, 54, 92, 107, 132, 170, 227, 312,
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86, 76, 136, 157, 190, 239, 312, 419
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},
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{
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/* DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick
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*/
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7, 8, 10, 14, 23, 44, 95, 241,
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8, 8, 11, 15, 25, 47, 102, 255,
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10, 11, 13, 19, 31, 58, 127, 255,
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14, 15, 19, 27, 44, 83, 181, 255,
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23, 25, 31, 44, 72, 136, 255, 255,
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44, 47, 58, 83, 136, 255, 255, 255,
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95, 102, 127, 181, 255, 255, 255, 255,
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241, 255, 255, 255, 255, 255, 255, 255
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},
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{
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/* A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
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*/
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15, 11, 11, 12, 15, 19, 25, 32,
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11, 13, 10, 10, 12, 15, 19, 24,
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11, 10, 14, 14, 16, 18, 22, 27,
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12, 10, 14, 18, 21, 24, 28, 33,
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15, 12, 16, 21, 26, 31, 36, 42,
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19, 15, 18, 24, 31, 38, 45, 53,
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25, 19, 22, 28, 36, 45, 55, 65,
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32, 24, 27, 33, 42, 53, 65, 77
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},
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{
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/* An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson
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*/
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14, 10, 11, 14, 19, 25, 34, 45,
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10, 11, 11, 12, 15, 20, 26, 33,
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11, 11, 15, 18, 21, 25, 31, 38,
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14, 12, 18, 24, 28, 33, 39, 47,
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19, 15, 21, 28, 36, 43, 51, 59,
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25, 20, 25, 33, 43, 54, 64, 74,
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34, 26, 31, 39, 51, 64, 77, 91,
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45, 33, 38, 47, 59, 74, 91, 108
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}
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};
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static const unsigned int std_chrominance_quant_tbl[9][DCTSIZE2] = {
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{
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/* JPEG Annex K
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*/
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17, 18, 24, 47, 99, 99, 99, 99,
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18, 21, 26, 66, 99, 99, 99, 99,
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24, 26, 56, 99, 99, 99, 99, 99,
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47, 66, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99
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},
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{
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/* flat
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*/
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16,
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16, 16, 16, 16, 16, 16, 16, 16
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},
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{
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8, 12, 15, 15, 86, 96, 96, 98,
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13, 13, 15, 26, 90, 96, 99, 98,
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12, 15, 18, 96, 99, 99, 99, 99,
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17, 16, 90, 96, 99, 99, 99, 99,
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96, 96, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99
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},
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{
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/* From http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008
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*/
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16, 16, 16, 18, 25, 37, 56, 85,
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16, 17, 20, 27, 34, 40, 53, 75,
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16, 20, 24, 31, 43, 62, 91, 135,
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18, 27, 31, 40, 53, 74, 106, 156,
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25, 34, 43, 53, 69, 94, 131, 189,
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37, 40, 62, 74, 94, 124, 169, 238,
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56, 53, 91, 106, 131, 169, 226, 311,
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85, 75, 135, 156, 189, 238, 311, 418
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},
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{
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9, 10, 17, 19, 62, 89, 91, 97,
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12, 13, 18, 29, 84, 91, 88, 98,
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14, 19, 29, 93, 95, 95, 98, 97,
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20, 26, 84, 88, 95, 95, 98, 94,
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26, 86, 91, 93, 97, 99, 98, 99,
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99, 100, 98, 99, 99, 99, 99, 99,
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99, 99, 99, 99, 99, 99, 99, 99,
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97, 97, 99, 99, 99, 99, 97, 99
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},
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{
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/* Relevance of human vision to JPEG-DCT compression (1992) Klein, Silverstein and Carney.
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* Copied from luma
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*/
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10, 12, 14, 19, 26, 38, 57, 86,
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12, 18, 21, 28, 35, 41, 54, 76,
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14, 21, 25, 32, 44, 63, 92, 136,
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19, 28, 32, 41, 54, 75, 107, 157,
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26, 35, 44, 54, 70, 95, 132, 190,
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38, 41, 63, 75, 95, 125, 170, 239,
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57, 54, 92, 107, 132, 170, 227, 312,
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86, 76, 136, 157, 190, 239, 312, 419
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},
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{
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/* DCTune perceptual optimization of compressed dental X-Rays (1997) Watson, Taylor, Borthwick
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* Copied from luma
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*/
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7, 8, 10, 14, 23, 44, 95, 241,
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8, 8, 11, 15, 25, 47, 102, 255,
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10, 11, 13, 19, 31, 58, 127, 255,
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14, 15, 19, 27, 44, 83, 181, 255,
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23, 25, 31, 44, 72, 136, 255, 255,
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44, 47, 58, 83, 136, 255, 255, 255,
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95, 102, 127, 181, 255, 255, 255, 255,
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241, 255, 255, 255, 255, 255, 255, 255
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},
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{
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/* A visual detection model for DCT coefficient quantization (12/9/93) Ahumada, Watson, Peterson
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* Copied from luma
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*/
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15, 11, 11, 12, 15, 19, 25, 32,
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11, 13, 10, 10, 12, 15, 19, 24,
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11, 10, 14, 14, 16, 18, 22, 27,
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12, 10, 14, 18, 21, 24, 28, 33,
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15, 12, 16, 21, 26, 31, 36, 42,
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19, 15, 18, 24, 31, 38, 45, 53,
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25, 19, 22, 28, 36, 45, 55, 65,
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32, 24, 27, 33, 42, 53, 65, 77
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},
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{
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/* An improved detection model for DCT coefficient quantization (1993) Peterson, Ahumada and Watson
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* Copied from luma
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*/
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14, 10, 11, 14, 19, 25, 34, 45,
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10, 11, 11, 12, 15, 20, 26, 33,
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11, 11, 15, 18, 21, 25, 31, 38,
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14, 12, 18, 24, 28, 33, 39, 47,
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19, 15, 21, 28, 36, 43, 51, 59,
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25, 20, 25, 33, 43, 54, 64, 74,
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34, 26, 31, 39, 51, 64, 77, 91,
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45, 33, 38, 47, 59, 74, 91, 108
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}
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};
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#if JPEG_LIB_VERSION >= 70
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GLOBAL(void)
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jpeg_default_qtables (j_compress_ptr cinfo, boolean force_baseline)
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/* Set or change the 'quality' (quantization) setting, using default tables
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* and straight percentage-scaling quality scales.
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* This entry point allows different scalings for luminance and chrominance.
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*/
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{
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/* Set up two quantization tables using the specified scaling */
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jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl[cinfo->master->quant_tbl_master_idx],
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cinfo->q_scale_factor[0], force_baseline);
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jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl[cinfo->master->quant_tbl_master_idx],
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cinfo->q_scale_factor[1], force_baseline);
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}
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#endif
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GLOBAL(void)
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jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
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boolean force_baseline)
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/* Set or change the 'quality' (quantization) setting, using default tables
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* and a straight percentage-scaling quality scale. In most cases it's better
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* to use jpeg_set_quality (below); this entry point is provided for
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* applications that insist on a linear percentage scaling.
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*/
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{
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/* Set up two quantization tables using the specified scaling */
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jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl[cinfo->master->quant_tbl_master_idx],
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scale_factor, force_baseline);
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jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl[cinfo->master->quant_tbl_master_idx],
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scale_factor, force_baseline);
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}
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GLOBAL(int)
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jpeg_quality_scaling (int quality)
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{
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return jpeg_float_quality_scaling(quality);
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}
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GLOBAL(float)
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jpeg_float_quality_scaling(float quality)
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/* Convert a user-specified quality rating to a percentage scaling factor
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* for an underlying quantization table, using our recommended scaling curve.
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* The input 'quality' factor should be 0 (terrible) to 100 (very good).
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*/
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{
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/* Safety limit on quality factor. Convert 0 to 1 to avoid zero divide. */
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if (quality <= 0.f) quality = 1.f;
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if (quality > 100.f) quality = 100.f;
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/* The basic table is used as-is (scaling 100) for a quality of 50.
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* Qualities 50..100 are converted to scaling percentage 200 - 2*Q;
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* note that at Q=100 the scaling is 0, which will cause jpeg_add_quant_table
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* to make all the table entries 1 (hence, minimum quantization loss).
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* Qualities 1..50 are converted to scaling percentage 5000/Q.
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*/
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if (quality < 50.f)
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quality = 5000.f / quality;
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else
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quality = 200.f - quality*2.f;
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return quality;
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}
|
|
|
|
|
|
GLOBAL(void)
|
|
jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
|
|
/* Set or change the 'quality' (quantization) setting, using default tables.
|
|
* This is the standard quality-adjusting entry point for typical user
|
|
* interfaces; only those who want detailed control over quantization tables
|
|
* would use the preceding three routines directly.
|
|
*/
|
|
{
|
|
/* Convert user 0-100 rating to percentage scaling */
|
|
quality = jpeg_quality_scaling(quality);
|
|
|
|
/* Set up standard quality tables */
|
|
jpeg_set_linear_quality(cinfo, quality, force_baseline);
|
|
}
|
|
|
|
|
|
/*
|
|
* Default parameter setup for compression.
|
|
*
|
|
* Applications that don't choose to use this routine must do their
|
|
* own setup of all these parameters. Alternately, you can call this
|
|
* to establish defaults and then alter parameters selectively. This
|
|
* is the recommended approach since, if we add any new parameters,
|
|
* your code will still work (they'll be set to reasonable defaults).
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
jpeg_set_defaults (j_compress_ptr cinfo)
|
|
{
|
|
int i;
|
|
|
|
/* Safety check to ensure start_compress not called yet. */
|
|
if (cinfo->global_state != CSTATE_START)
|
|
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
|
|
|
|
/* Allocate comp_info array large enough for maximum component count.
|
|
* Array is made permanent in case application wants to compress
|
|
* multiple images at same param settings.
|
|
*/
|
|
if (cinfo->comp_info == NULL)
|
|
cinfo->comp_info = (jpeg_component_info *)
|
|
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
|
|
MAX_COMPONENTS * sizeof(jpeg_component_info));
|
|
|
|
/* Initialize everything not dependent on the color space */
|
|
|
|
#if JPEG_LIB_VERSION >= 70
|
|
cinfo->scale_num = 1; /* 1:1 scaling */
|
|
cinfo->scale_denom = 1;
|
|
#endif
|
|
cinfo->data_precision = BITS_IN_JSAMPLE;
|
|
/* Set up two quantization tables using default quality of 75 */
|
|
jpeg_set_quality(cinfo, 75, TRUE);
|
|
/* Set up two Huffman tables */
|
|
std_huff_tables((j_common_ptr) cinfo);
|
|
|
|
/* Initialize default arithmetic coding conditioning */
|
|
for (i = 0; i < NUM_ARITH_TBLS; i++) {
|
|
cinfo->arith_dc_L[i] = 0;
|
|
cinfo->arith_dc_U[i] = 1;
|
|
cinfo->arith_ac_K[i] = 5;
|
|
}
|
|
|
|
/* Default is no multiple-scan output */
|
|
cinfo->scan_info = NULL;
|
|
cinfo->num_scans = 0;
|
|
|
|
/* Expect normal source image, not raw downsampled data */
|
|
cinfo->raw_data_in = FALSE;
|
|
|
|
/* Use Huffman coding, not arithmetic coding, by default */
|
|
cinfo->arith_code = FALSE;
|
|
|
|
#ifdef ENTROPY_OPT_SUPPORTED
|
|
if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION)
|
|
/* By default, do extra passes to optimize entropy coding */
|
|
cinfo->optimize_coding = TRUE;
|
|
else
|
|
/* By default, don't do extra passes to optimize entropy coding */
|
|
cinfo->optimize_coding = FALSE;
|
|
#else
|
|
/* By default, don't do extra passes to optimize entropy coding */
|
|
cinfo->optimize_coding = FALSE;
|
|
#endif
|
|
|
|
/* The standard Huffman tables are only valid for 8-bit data precision.
|
|
* If the precision is higher, force optimization on so that usable
|
|
* tables will be computed. This test can be removed if default tables
|
|
* are supplied that are valid for the desired precision.
|
|
*/
|
|
if (cinfo->data_precision > 8)
|
|
cinfo->optimize_coding = TRUE;
|
|
|
|
/* By default, use the simpler non-cosited sampling alignment */
|
|
cinfo->CCIR601_sampling = FALSE;
|
|
|
|
#if JPEG_LIB_VERSION >= 70
|
|
/* By default, apply fancy downsampling */
|
|
cinfo->do_fancy_downsampling = TRUE;
|
|
#endif
|
|
|
|
cinfo->master->overshoot_deringing =
|
|
cinfo->master->compress_profile == JCP_MAX_COMPRESSION;
|
|
|
|
/* No input smoothing */
|
|
cinfo->smoothing_factor = 0;
|
|
|
|
/* DCT algorithm preference */
|
|
cinfo->dct_method = JDCT_DEFAULT;
|
|
|
|
/* No restart markers */
|
|
cinfo->restart_interval = 0;
|
|
cinfo->restart_in_rows = 0;
|
|
|
|
/* Fill in default JFIF marker parameters. Note that whether the marker
|
|
* will actually be written is determined by jpeg_set_colorspace.
|
|
*
|
|
* By default, the library emits JFIF version code 1.01.
|
|
* An application that wants to emit JFIF 1.02 extension markers should set
|
|
* JFIF_minor_version to 2. We could probably get away with just defaulting
|
|
* to 1.02, but there may still be some decoders in use that will complain
|
|
* about that; saying 1.01 should minimize compatibility problems.
|
|
*/
|
|
cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */
|
|
cinfo->JFIF_minor_version = 1;
|
|
cinfo->density_unit = 0; /* Pixel size is unknown by default */
|
|
cinfo->X_density = 1; /* Pixel aspect ratio is square by default */
|
|
cinfo->Y_density = 1;
|
|
|
|
/* Choose JPEG colorspace based on input space, set defaults accordingly */
|
|
|
|
jpeg_default_colorspace(cinfo);
|
|
|
|
cinfo->master->dc_scan_opt_mode = 1;
|
|
|
|
#ifdef C_PROGRESSIVE_SUPPORTED
|
|
if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
|
|
cinfo->master->optimize_scans = TRUE;
|
|
jpeg_simple_progression(cinfo);
|
|
} else
|
|
cinfo->master->optimize_scans = FALSE;
|
|
#endif
|
|
|
|
cinfo->master->trellis_quant =
|
|
cinfo->master->compress_profile == JCP_MAX_COMPRESSION;
|
|
cinfo->master->lambda_log_scale1 = 14.75;
|
|
cinfo->master->lambda_log_scale2 = 16.5;
|
|
cinfo->master->quant_tbl_master_idx =
|
|
cinfo->master->compress_profile == JCP_MAX_COMPRESSION ? 3 : 0;
|
|
|
|
cinfo->master->use_lambda_weight_tbl = TRUE;
|
|
cinfo->master->use_scans_in_trellis = FALSE;
|
|
cinfo->master->trellis_freq_split = 8;
|
|
cinfo->master->trellis_num_loops = 1;
|
|
cinfo->master->trellis_q_opt = FALSE;
|
|
cinfo->master->trellis_quant_dc = TRUE;
|
|
cinfo->master->trellis_delta_dc_weight = 0.0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Select an appropriate JPEG colorspace for in_color_space.
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
jpeg_default_colorspace (j_compress_ptr cinfo)
|
|
{
|
|
switch (cinfo->in_color_space) {
|
|
case JCS_GRAYSCALE:
|
|
jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
|
|
break;
|
|
case JCS_RGB:
|
|
case JCS_EXT_RGB:
|
|
case JCS_EXT_RGBX:
|
|
case JCS_EXT_BGR:
|
|
case JCS_EXT_BGRX:
|
|
case JCS_EXT_XBGR:
|
|
case JCS_EXT_XRGB:
|
|
case JCS_EXT_RGBA:
|
|
case JCS_EXT_BGRA:
|
|
case JCS_EXT_ABGR:
|
|
case JCS_EXT_ARGB:
|
|
jpeg_set_colorspace(cinfo, JCS_YCbCr);
|
|
break;
|
|
case JCS_YCbCr:
|
|
jpeg_set_colorspace(cinfo, JCS_YCbCr);
|
|
break;
|
|
case JCS_CMYK:
|
|
jpeg_set_colorspace(cinfo, JCS_CMYK); /* By default, no translation */
|
|
break;
|
|
case JCS_YCCK:
|
|
jpeg_set_colorspace(cinfo, JCS_YCCK);
|
|
break;
|
|
case JCS_UNKNOWN:
|
|
jpeg_set_colorspace(cinfo, JCS_UNKNOWN);
|
|
break;
|
|
default:
|
|
ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Set the JPEG colorspace, and choose colorspace-dependent default values.
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
|
|
{
|
|
jpeg_component_info * compptr;
|
|
int ci;
|
|
|
|
#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \
|
|
(compptr = &cinfo->comp_info[index], \
|
|
compptr->component_id = (id), \
|
|
compptr->h_samp_factor = (hsamp), \
|
|
compptr->v_samp_factor = (vsamp), \
|
|
compptr->quant_tbl_no = (quant), \
|
|
compptr->dc_tbl_no = (dctbl), \
|
|
compptr->ac_tbl_no = (actbl) )
|
|
|
|
/* Safety check to ensure start_compress not called yet. */
|
|
if (cinfo->global_state != CSTATE_START)
|
|
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
|
|
|
|
/* For all colorspaces, we use Q and Huff tables 0 for luminance components,
|
|
* tables 1 for chrominance components.
|
|
*/
|
|
|
|
cinfo->jpeg_color_space = colorspace;
|
|
|
|
cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
|
|
cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
|
|
|
|
switch (colorspace) {
|
|
case JCS_GRAYSCALE:
|
|
cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
|
|
cinfo->num_components = 1;
|
|
/* JFIF specifies component ID 1 */
|
|
SET_COMP(0, 1, 1,1, 0, 0,0);
|
|
break;
|
|
case JCS_RGB:
|
|
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */
|
|
cinfo->num_components = 3;
|
|
SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, 0,0);
|
|
SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
|
|
SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
|
|
break;
|
|
case JCS_YCbCr:
|
|
cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
|
|
cinfo->num_components = 3;
|
|
/* JFIF specifies component IDs 1,2,3 */
|
|
/* We default to 2x2 subsamples of chrominance */
|
|
SET_COMP(0, 1, 2,2, 0, 0,0);
|
|
SET_COMP(1, 2, 1,1, 1, 1,1);
|
|
SET_COMP(2, 3, 1,1, 1, 1,1);
|
|
break;
|
|
case JCS_CMYK:
|
|
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
|
|
cinfo->num_components = 4;
|
|
SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
|
|
SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
|
|
SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
|
|
SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
|
|
break;
|
|
case JCS_YCCK:
|
|
cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */
|
|
cinfo->num_components = 4;
|
|
SET_COMP(0, 1, 2,2, 0, 0,0);
|
|
SET_COMP(1, 2, 1,1, 1, 1,1);
|
|
SET_COMP(2, 3, 1,1, 1, 1,1);
|
|
SET_COMP(3, 4, 2,2, 0, 0,0);
|
|
break;
|
|
case JCS_UNKNOWN:
|
|
cinfo->num_components = cinfo->input_components;
|
|
if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS)
|
|
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
|
|
MAX_COMPONENTS);
|
|
for (ci = 0; ci < cinfo->num_components; ci++) {
|
|
SET_COMP(ci, ci, 1,1, 0, 0,0);
|
|
}
|
|
break;
|
|
default:
|
|
ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
|
|
}
|
|
}
|
|
|
|
|
|
#ifdef C_PROGRESSIVE_SUPPORTED
|
|
|
|
LOCAL(jpeg_scan_info *)
|
|
fill_a_scan (jpeg_scan_info * scanptr, int ci,
|
|
int Ss, int Se, int Ah, int Al)
|
|
/* Support routine: generate one scan for specified component */
|
|
{
|
|
scanptr->comps_in_scan = 1;
|
|
scanptr->component_index[0] = ci;
|
|
scanptr->Ss = Ss;
|
|
scanptr->Se = Se;
|
|
scanptr->Ah = Ah;
|
|
scanptr->Al = Al;
|
|
scanptr++;
|
|
return scanptr;
|
|
}
|
|
|
|
LOCAL(jpeg_scan_info *)
|
|
fill_a_scan_pair (jpeg_scan_info * scanptr, int ci,
|
|
int Ss, int Se, int Ah, int Al)
|
|
/* Support routine: generate one scan for pair of components */
|
|
{
|
|
scanptr->comps_in_scan = 2;
|
|
scanptr->component_index[0] = ci;
|
|
scanptr->component_index[1] = ci + 1;
|
|
scanptr->Ss = Ss;
|
|
scanptr->Se = Se;
|
|
scanptr->Ah = Ah;
|
|
scanptr->Al = Al;
|
|
scanptr++;
|
|
return scanptr;
|
|
}
|
|
|
|
LOCAL(jpeg_scan_info *)
|
|
fill_scans (jpeg_scan_info * scanptr, int ncomps,
|
|
int Ss, int Se, int Ah, int Al)
|
|
/* Support routine: generate one scan for each component */
|
|
{
|
|
int ci;
|
|
|
|
for (ci = 0; ci < ncomps; ci++) {
|
|
scanptr->comps_in_scan = 1;
|
|
scanptr->component_index[0] = ci;
|
|
scanptr->Ss = Ss;
|
|
scanptr->Se = Se;
|
|
scanptr->Ah = Ah;
|
|
scanptr->Al = Al;
|
|
scanptr++;
|
|
}
|
|
return scanptr;
|
|
}
|
|
|
|
LOCAL(jpeg_scan_info *)
|
|
fill_dc_scans (jpeg_scan_info * scanptr, int ncomps, int Ah, int Al)
|
|
/* Support routine: generate interleaved DC scan if possible, else N scans */
|
|
{
|
|
int ci;
|
|
|
|
if (ncomps <= MAX_COMPS_IN_SCAN) {
|
|
/* Single interleaved DC scan */
|
|
scanptr->comps_in_scan = ncomps;
|
|
for (ci = 0; ci < ncomps; ci++)
|
|
scanptr->component_index[ci] = ci;
|
|
scanptr->Ss = scanptr->Se = 0;
|
|
scanptr->Ah = Ah;
|
|
scanptr->Al = Al;
|
|
scanptr++;
|
|
} else {
|
|
/* Noninterleaved DC scan for each component */
|
|
scanptr = fill_scans(scanptr, ncomps, 0, 0, Ah, Al);
|
|
}
|
|
return scanptr;
|
|
}
|
|
|
|
|
|
/*
|
|
* List of scans to be tested
|
|
* cinfo->num_components and cinfo->jpeg_color_space must be correct.
|
|
*/
|
|
|
|
LOCAL(boolean)
|
|
jpeg_search_progression (j_compress_ptr cinfo)
|
|
{
|
|
int ncomps = cinfo->num_components;
|
|
int nscans;
|
|
jpeg_scan_info * scanptr;
|
|
int Al;
|
|
int frequency_split[] = { 2, 8, 5, 12, 18 };
|
|
int i;
|
|
|
|
/* Safety check to ensure start_compress not called yet. */
|
|
if (cinfo->global_state != CSTATE_START)
|
|
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
|
|
|
|
/* Figure space needed for script. Calculation must match code below! */
|
|
if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
|
|
/* Custom script for YCbCr color images. */
|
|
nscans = 64;
|
|
} else if (ncomps == 1) {
|
|
nscans = 23;
|
|
} else {
|
|
cinfo->master->num_scans_luma = 0;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Allocate space for script.
|
|
* We need to put it in the permanent pool in case the application performs
|
|
* multiple compressions without changing the settings. To avoid a memory
|
|
* leak if jpeg_simple_progression is called repeatedly for the same JPEG
|
|
* object, we try to re-use previously allocated space, and we allocate
|
|
* enough space to handle YCbCr even if initially asked for grayscale.
|
|
*/
|
|
if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) {
|
|
cinfo->script_space_size = MAX(nscans, 64);
|
|
cinfo->script_space = (jpeg_scan_info *)
|
|
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
|
|
cinfo->script_space_size * sizeof(jpeg_scan_info));
|
|
}
|
|
scanptr = cinfo->script_space;
|
|
cinfo->scan_info = scanptr;
|
|
cinfo->num_scans = nscans;
|
|
|
|
cinfo->master->Al_max_luma = 3;
|
|
cinfo->master->num_scans_luma_dc = 1;
|
|
cinfo->master->num_frequency_splits = 5;
|
|
cinfo->master->num_scans_luma =
|
|
cinfo->master->num_scans_luma_dc + (3 * cinfo->master->Al_max_luma + 2) +
|
|
(2 * cinfo->master->num_frequency_splits + 1);
|
|
|
|
/* 23 scans for luma */
|
|
/* 1 scan for DC */
|
|
/* 11 scans to determine successive approximation */
|
|
/* 11 scans to determine frequency approximation */
|
|
/* after 12 scans need to update following 11 */
|
|
/* after 23 scans need to determine which to keep */
|
|
/* last 4 done conditionally */
|
|
|
|
/* luma DC by itself */
|
|
if (cinfo->master->dc_scan_opt_mode == 0)
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 0, 0);
|
|
else
|
|
scanptr = fill_dc_scans(scanptr, 1, 0, 0);
|
|
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 8, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 0, 9, 63, 0, 0);
|
|
|
|
for (Al = 0; Al < cinfo->master->Al_max_luma; Al++) {
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 63, Al+1, Al);
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 8, 0, Al+1);
|
|
scanptr = fill_a_scan(scanptr, 0, 9, 63, 0, Al+1);
|
|
}
|
|
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 63, 0, 0);
|
|
|
|
for (i = 0; i < cinfo->master->num_frequency_splits; i++) {
|
|
scanptr = fill_a_scan(scanptr, 0, 1, frequency_split[i], 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 0, frequency_split[i]+1, 63, 0, 0);
|
|
}
|
|
|
|
if (ncomps == 1) {
|
|
cinfo->master->Al_max_chroma = 0;
|
|
cinfo->master->num_scans_chroma_dc = 0;
|
|
} else {
|
|
cinfo->master->Al_max_chroma = 2;
|
|
cinfo->master->num_scans_chroma_dc = 3;
|
|
/* 41 scans for chroma */
|
|
|
|
/* chroma DC combined */
|
|
scanptr = fill_a_scan_pair(scanptr, 1, 0, 0, 0, 0);
|
|
/* chroma DC separate */
|
|
scanptr = fill_a_scan(scanptr, 1, 0, 0, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 0, 0, 0, 0);
|
|
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 8, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 1, 9, 63, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 8, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 9, 63, 0, 0);
|
|
|
|
for (Al = 0; Al < cinfo->master->Al_max_chroma; Al++) {
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 63, Al+1, Al);
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 63, Al+1, Al);
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 8, 0, Al+1);
|
|
scanptr = fill_a_scan(scanptr, 1, 9, 63, 0, Al+1);
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 8, 0, Al+1);
|
|
scanptr = fill_a_scan(scanptr, 2, 9, 63, 0, Al+1);
|
|
}
|
|
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 63, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 63, 0, 0);
|
|
|
|
for (i = 0; i < cinfo->master->num_frequency_splits; i++) {
|
|
scanptr = fill_a_scan(scanptr, 1, 1, frequency_split[i], 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 1, frequency_split[i]+1, 63, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 1, frequency_split[i], 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, frequency_split[i]+1, 63, 0, 0);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Create a recommended progressive-JPEG script.
|
|
* cinfo->num_components and cinfo->jpeg_color_space must be correct.
|
|
*/
|
|
|
|
GLOBAL(void)
|
|
jpeg_simple_progression (j_compress_ptr cinfo)
|
|
{
|
|
int ncomps;
|
|
int nscans;
|
|
jpeg_scan_info * scanptr;
|
|
|
|
if (cinfo->master->optimize_scans) {
|
|
if (jpeg_search_progression(cinfo) == TRUE)
|
|
return;
|
|
}
|
|
|
|
/* Safety check to ensure start_compress not called yet. */
|
|
if (cinfo->global_state != CSTATE_START)
|
|
ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
|
|
|
|
/* Figure space needed for script. Calculation must match code below! */
|
|
ncomps = cinfo->num_components;
|
|
if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
|
|
/* Custom script for YCbCr color images. */
|
|
nscans = 10;
|
|
} else {
|
|
/* All-purpose script for other color spaces. */
|
|
if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
|
|
if (ncomps > MAX_COMPS_IN_SCAN)
|
|
nscans = 5 * ncomps; /* 2 DC + 4 AC scans per component */
|
|
else
|
|
nscans = 1 + 4 * ncomps; /* 2 DC scans; 4 AC scans per component */
|
|
} else {
|
|
if (ncomps > MAX_COMPS_IN_SCAN)
|
|
nscans = 6 * ncomps; /* 2 DC + 4 AC scans per component */
|
|
else
|
|
nscans = 2 + 4 * ncomps; /* 2 DC scans; 4 AC scans per component */
|
|
}
|
|
}
|
|
|
|
/* Allocate space for script.
|
|
* We need to put it in the permanent pool in case the application performs
|
|
* multiple compressions without changing the settings. To avoid a memory
|
|
* leak if jpeg_simple_progression is called repeatedly for the same JPEG
|
|
* object, we try to re-use previously allocated space, and we allocate
|
|
* enough space to handle YCbCr even if initially asked for grayscale.
|
|
*/
|
|
if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) {
|
|
cinfo->script_space_size = MAX(nscans, 10);
|
|
cinfo->script_space = (jpeg_scan_info *)
|
|
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
|
|
cinfo->script_space_size * sizeof(jpeg_scan_info));
|
|
}
|
|
scanptr = cinfo->script_space;
|
|
cinfo->scan_info = scanptr;
|
|
cinfo->num_scans = nscans;
|
|
|
|
if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
|
|
/* Custom script for YCbCr color images. */
|
|
if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
|
|
/* scan defined in jpeg_scan_rgb.txt in jpgcrush */
|
|
/* Initial DC scan */
|
|
if (cinfo->master->dc_scan_opt_mode == 0)
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 0, 0);
|
|
else if (cinfo->master->dc_scan_opt_mode == 1) {
|
|
scanptr = fill_a_scan(scanptr, 0, 0, 0, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 1, 0, 0, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 0, 0, 0, 0);
|
|
}
|
|
else {
|
|
scanptr = fill_dc_scans(scanptr, 1, 0, 0);
|
|
scanptr = fill_a_scan_pair(scanptr, 1, 0, 0, 0, 0);
|
|
}
|
|
/* Low frequency AC scans */
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 8, 0, 2);
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 8, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 8, 0, 0);
|
|
/* Complete spectral selection for luma AC */
|
|
scanptr = fill_a_scan(scanptr, 0, 9, 63, 0, 2);
|
|
/* Finish luma AC successive approximation */
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 63, 2, 1);
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 63, 1, 0);
|
|
/* Complete spectral selection for chroma AC */
|
|
scanptr = fill_a_scan(scanptr, 1, 9, 63, 0, 0);
|
|
scanptr = fill_a_scan(scanptr, 2, 9, 63, 0, 0);
|
|
} else {
|
|
/* Initial DC scan */
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
|
|
/* Initial AC scan: get some luma data out in a hurry */
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 5, 0, 2);
|
|
/* Chroma data is too small to be worth expending many scans on */
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 63, 0, 1);
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 63, 0, 1);
|
|
/* Complete spectral selection for luma AC */
|
|
scanptr = fill_a_scan(scanptr, 0, 6, 63, 0, 2);
|
|
/* Refine next bit of luma AC */
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 63, 2, 1);
|
|
/* Finish DC successive approximation */
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
|
|
/* Finish AC successive approximation */
|
|
scanptr = fill_a_scan(scanptr, 2, 1, 63, 1, 0);
|
|
scanptr = fill_a_scan(scanptr, 1, 1, 63, 1, 0);
|
|
/* Luma bottom bit comes last since it's usually largest scan */
|
|
scanptr = fill_a_scan(scanptr, 0, 1, 63, 1, 0);
|
|
}
|
|
} else {
|
|
/* All-purpose script for other color spaces. */
|
|
if (cinfo->master->compress_profile == JCP_MAX_COMPRESSION) {
|
|
/* scan defined in jpeg_scan_bw.txt in jpgcrush */
|
|
/* DC component, no successive approximation */
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 0, 0);
|
|
/* Successive approximation first pass */
|
|
scanptr = fill_scans(scanptr, ncomps, 1, 8, 0, 2);
|
|
scanptr = fill_scans(scanptr, ncomps, 9, 63, 0, 2);
|
|
/* Successive approximation second pass */
|
|
scanptr = fill_scans(scanptr, ncomps, 1, 63, 2, 1);
|
|
/* Successive approximation final pass */
|
|
scanptr = fill_scans(scanptr, ncomps, 1, 63, 1, 0);
|
|
} else {
|
|
/* Successive approximation first pass */
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
|
|
scanptr = fill_scans(scanptr, ncomps, 1, 5, 0, 2);
|
|
scanptr = fill_scans(scanptr, ncomps, 6, 63, 0, 2);
|
|
/* Successive approximation second pass */
|
|
scanptr = fill_scans(scanptr, ncomps, 1, 63, 2, 1);
|
|
/* Successive approximation final pass */
|
|
scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
|
|
scanptr = fill_scans(scanptr, ncomps, 1, 63, 1, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* C_PROGRESSIVE_SUPPORTED */
|