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e6fe804bdd
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302 Commits

Author SHA1 Message Date
Carl Eugen Hoyos
e6fe804bdd Do not set swscale sizeFactor to -1. 
Fixes ticket #3495.
 2014-03-25 15:46:35 +01:00
Øyvind Kolås
3e6016622e swscale: add two spatially stable dithering methods 
Both of these dithering methods are from http://pippin.gimp.org/a_dither/ for
GIF they can be considered better than bayer (provides more gray-levels), and
spatial stability - often more than twice as good compression and less visual
flicker than error diffusion methods (the methods also avoids error-shadow
artifacts of diffusion dithers).

These methods are similar to blue/green noise type dither masks; but are
simple enough to generate their mask on the fly. They are still research work
in progress; though more expensive to generate masks (which can be used in a
LUT) like 'void and cluster' and similar methods will yield superior results
 2014-03-25 13:48:06 +01:00
Carl Eugen Hoyos
37c07d4529 swscale/utils: Fix color range of gray16 
Improves rgb -> gray16 conversion

Fixes Ticket3422

The pam and png output files look visually similar, in both cases the
dynamics increase to 0x0 -> 0xfffb.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2014-03-18 22:15:15 +01:00
Peter Ross
02b63246cf libswscale: bayer to rgb24 & yv12 colorspace converters 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2014-02-23 02:38:22 +01:00
Michael Niedermayer
51fed95dde swscale/utils: fix wrong deprecated message with rgb0 
Fixes Ticket3242
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-12-24 22:47:49 +01:00
Michael Niedermayer
037fc3b054 swscale/utils: check chroma width for fast bilinear scaler 
Fixes artifacts where fast bilinear was used for downscaling chroma

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-12-15 14:13:55 +01:00
Michael Niedermayer
554e913fd7 swscale/utils: remove useless () 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-12-15 14:10:02 +01:00
Michael Niedermayer
dc54bd4e8d swscale/utils: factor (d + 1 < 4) out 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-12-15 13:49:20 +01:00
Michael Niedermayer
4d18060e56 swscale/utils: fill xyz tables only when they will be used 
makes the first call to sws_getContext() 1ms faster

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-12-07 02:04:31 +01:00
Stefano Sabatini
2a6c95d85f lsws/utils: introduce scale_algorithms array 
Allow some dumb factorizations, slightly decrease spaghetti factor.
 2013-11-05 14:01:53 +01:00
Stefano Sabatini
246e323de8 lsws/utils: fix typo 2013-11-05 00:04:17 +01:00
Stefano Sabatini
ff9d11f95d lsws: use av_pix_fmt_get_chroma_sub_sample() 
Remove duplicated getSubSampleFactors() function. Simplify.
 2013-10-24 08:12:38 +02:00
Michael Niedermayer
eb4205cc89 swscale/utils: check mprotect() return code 
Found-by: wm4
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-10-23 10:14:05 +02:00
Michael Niedermayer
2db6547237 swscale/utils/sws_setColorspaceDetails(): fix indention 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-10-17 14:02:43 +02:00
Michael Niedermayer
a830915b78 swscale: Use full resolution chroma for yuv2rgb when the input has full chroma 
See Ticket3028

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-10-10 17:28:59 +02:00
Michael Niedermayer
5710f55e49 Merge commit '6b3ff6f91a535d6383f41ca7bdf760165dcb6015' 
* commit '6b3ff6f91a535d6383f41ca7bdf760165dcb6015':
  swscale: provide a default scaler if none is set

Conflicts:
	libswscale/utils.c

The default is left at bicubic until someone has compared the scalers
properly speed and quality wise.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-10-06 11:44:05 +02:00
Vittorio Giovara
6b3ff6f91a swscale: provide a default scaler if none is set 
Lanczos for general case, sinc for upscaling, Gaussian for
downscaling. According to current literature these scalers
should be the best quality-wise algorithms for each case.

Inspired from a patch by wm4 <nfxjfg@googlemail.com>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
 2013-10-05 18:38:55 +02:00
Michael Niedermayer
2e2a2d8801 swscale/utils: dont divide by zero with zero vectors 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-10-01 00:27:28 +02:00
Michael Niedermayer
2d28950da9 swscale/utils: remove redundant NULL checks before sws_freeVec() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-09-17 21:48:54 +02:00
Michael Niedermayer
a446657d8c swscale/utils: simplify cpu caps printing code 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-09-17 21:31:58 +02:00
Michael Niedermayer
9d052adbeb swscale/utils: Simplify scaler name printing code 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-09-17 21:29:42 +02:00
Michael Niedermayer
aec91de549 swscale/utils: Allow sws_setColorspaceDetails() to use the tables from sws_getColorspaceDetails() 
Previously this would have lead to a memcpy(a,a) which violates the
requirement of non overlapping src and dst.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-09-17 17:21:13 +02:00
Michael Niedermayer
c914c99d4b swscale/utils: use memcpy instead of loop in sws_cloneVec() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-09-08 16:39:38 +02:00
Michael Niedermayer
f0a3562382 Merge commit '79aec43ce813a3e270743ca64fa3f31fa43df80b' 
* commit '79aec43ce813a3e270743ca64fa3f31fa43df80b':
  x86: Add and use more convenience macros to check CPU extension availability

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-30 11:57:35 +02:00
Michael Niedermayer
01cac26f68 Merge commit '1909f6b1b6da2db371c179bed5a19aaf979b7557' 
* commit '1909f6b1b6da2db371c179bed5a19aaf979b7557':
  swscale: cosmetics: Drop silly camelCase from swScale function pointer name

Conflicts:
	libswscale/swscale_unscaled.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-29 15:56:03 +02:00
Michael Niedermayer
5ff1b588eb Merge commit 'c2503d9c8ab42ea55922e9f5a10c8bfbbbfeaf19' 
* commit 'c2503d9c8ab42ea55922e9f5a10c8bfbbbfeaf19':
  swscale: ppc: Hide arch-specific initialization details

Conflicts:
	libswscale/utils.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-29 15:10:09 +02:00
Michael Niedermayer
29daad5b98 Merge commit 'f61bece684d9685b07895508e6c1c733b5564ccf' 
* commit 'f61bece684d9685b07895508e6c1c733b5564ccf':
  ppc: Add and use convenience macro to check for AltiVec availability

Conflicts:
	libavcodec/ppc/dsputil_ppc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-29 14:24:07 +02:00
Diego Biurrun
79aec43ce8 x86: Add and use more convenience macros to check CPU extension availability 2013-08-29 13:07:37 +02:00
Diego Biurrun
1909f6b1b6 swscale: cosmetics: Drop silly camelCase from swScale function pointer name 2013-08-29 10:23:54 +02:00
Diego Biurrun
c2503d9c8a swscale: ppc: Hide arch-specific initialization details 
Also give consistent names to init functions.
 2013-08-29 10:23:41 +02:00
Diego Biurrun
f61bece684 ppc: Add and use convenience macro to check for AltiVec availability 2013-08-28 23:54:15 +02:00
Michael Niedermayer
23b3141261 swscale: improve dither checks 
Bssed on patch by Øyvind Kolås <pippin@gimp.org>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-19 18:33:50 +02:00
Michael Niedermayer
8c50ea2251 swscale: set dither to a specific value for rgb/bgr8 output 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-19 18:31:35 +02:00
Michael Niedermayer
c14fc4585c Merge commit 'aa2ba8c99e5708884a56aea9c1d96e014866f8a3' 
* commit 'aa2ba8c99e5708884a56aea9c1d96e014866f8a3':
  swscale: Move extern declarations for tables to swscale_internal.h

Conflicts:
	libswscale/output.c
	libswscale/swscale_internal.h
	libswscale/swscale_unscaled.c
	libswscale/utils.c
	libswscale/yuv2rgb.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-16 12:56:48 +02:00
Michael Niedermayer
1e0e193240 sws: add dither enum 
This allows specifying more dither algorithms without using up flags and
without ambiguities.

Also initialize the new field based on the flags and use it.
Note, improving the logic of the checks is left to subsequent
commits, this here only switches from flags to enum.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-15 21:39:32 +02:00
Diego Biurrun
aa2ba8c99e swscale: Move extern declarations for tables to swscale_internal.h 
Also add missing ff_ prefixes where necessary.
 2013-08-15 14:38:03 +02:00
Michael Niedermayer
8d745281a4 swscale/utils: Fix potential overflow of srcPos*C before converting to 64bit 
Fixes CID1061054

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-08 02:56:26 +02:00
Michael Niedermayer
bc721ac9f7 swscale/utils: Fix potential overflow of dstPos*xInc before converting to 64bit 
Fixes CID1061053

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-08-08 02:51:52 +02:00
Michael Niedermayer
8efe96ee6f swscale/fill_rgb2yuv_table: fix default detection 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-27 01:11:37 +02:00
Michael Niedermayer
a7e45cfa11 swscale/sws_getColorspaceDetails: dont fail for non yuv 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-25 02:50:46 +02:00
Michael Niedermayer
436616fd42 swscale: exchange src & dst chroma pos 
Found-by: wm4
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-24 22:43:50 +02:00
clook
b9b1a2c3e4 libswscale: Adding RGB => XYZ support 2013-07-23 01:02:41 +02:00
Michael Niedermayer
b405f4e916 swscale: Add support to specify chroma position 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-17 01:59:10 +02:00
Michael Niedermayer
37f4aa133d swscale: move default colorspace setup to sws_init_filter() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-16 02:44:25 +02:00
Michael Niedermayer
c75dde6074 swscale: call handle_format() from the functions that need it 
This should fix some hypothetical issues with alloc/init_context() usage

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-14 03:36:19 +02:00
Michael Niedermayer
0fc11e7bad swscale: make handle_formats() safe to be called multiple times 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-14 03:36:19 +02:00
Michael Niedermayer
d5f5e51662 swscale: move format handling to its own function 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-14 03:36:19 +02:00
Michael Niedermayer
1ba01d3d46 swscale: treat gray as a fullrage (0-255) format 
Fixes Ticket2684

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-07-08 15:21:48 +02:00
Hendrik Leppkes
7cdf574c22 swscale: fix filter alignment reduction without inline asm 
Fixes scaling in MSVC/ICL, where inline asm is not present, but the
YASM scaling code is.

Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-06-21 21:01:11 +02:00
Michael Niedermayer
a90baa63c3 add YUVJ411P 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-05-21 12:56:11 +02:00