Commit Graph

3125 Commits

Author SHA1 Message Date
Vincent Rabaud
059aab4fa1 Fix a compression regression for images with long uniform regions.
Change-Id: Id87a4ac2a22daaa71e8f3132e69703b9b3ddd752
2016-06-14 21:51:10 +02:00
Vincent Rabaud
b0c7e49e58 Check more backward matches with higher quality.
Change-Id: I3f0887b0b9b7f0e69758f51783807e1583b74be2
2016-06-14 21:50:03 +02:00
Vincent Rabaud
a3611513d2 Revert an LZ77 boundary constant.
This is getting back to the old behavior which is actually better for
compression and speed with the latest patches.

Change-Id: I35884bab02589297c25d6e1e66dc5f13e05f7aa7
2016-06-14 21:42:45 +02:00
James Zern
8190374c2b README: fix typo
Change-Id: Id744d5f994bed6522f3be7d6b90e6b78bd8da587
2016-06-13 22:48:04 -07:00
James Zern
7551db445e update NEWS
Change-Id: I022f975ed1b2f6d9ccbf4a3f4c4bd2113eafacfd
2016-06-13 20:06:37 -07:00
James Zern
0fb2269c4d bump version to 0.5.1
libwebp{,decoder} - 0.5.1
libwebp libtool - 6.1.0
libwebpdecoder libtool - 2.1.0

mux - 0.3.1
libtool - 2.1.0

demux (no changes) - 0.3.0
libtool - 2.0.0

Change-Id: I6f51bfaccf33ff7a1492f3e8f888324d7afc0f4b
2016-06-13 19:10:21 -07:00
James Zern
f45376101c update AUTHORS & .mailmap
Change-Id: Ia0e25b9af8dd66f16ca75bd35bcd3e5e41c0bdbd
2016-06-13 19:01:37 -07:00
Urvang Joshi
3259571e7d Refactor GetColorPalette method.
This was defined (slightly differently) at two places. Created a common
method and moved to utils/utils.[hc].

Change-Id: I66c3ac6dea24e0cd2c0eaa5440f3142b4dbbe23b
2016-06-13 18:52:37 -07:00
Pascal Massimino
1df5e26001 avoid using tmp histogram in PreparePair()
we don't need to store the resulting histogram, so no need to
call HistogramAddEval().
Allows some signature simplifications...

Change-Id: I3fff6c45f4a7c6179499c6078ff159df4ca0ac53
2016-06-12 14:32:22 -07:00
Pascal Massimino
7685123a7f fix comment typos
Change-Id: I2a55e371dbf7e62b446f6bb732c8913b85633c49
2016-06-10 13:29:07 +00:00
Vincent Rabaud
a246b921a0 Speedup backward references.
In case where the same offset is found in consecutive pixels,
the cost computation from one pixel can be re-used for the next.

Change-Id: Ic03c7d4ab95f3612eafc703349cfefd75273c3d7
2016-06-09 20:05:15 +02:00
Pascal Massimino
76d73f1835 Merge "CostManager: introduce a free-list of ~10 intervals" 2016-06-09 15:58:38 +00:00
Pascal Massimino
eab39d8147 CostManager: introduce a free-list of ~10 intervals
and also recycle the malloc'd intervals
This avoids quite some malloc/free cycles during interval managment.

Change-Id: Ic2892e7c0260d0fca0e455d4728f261fb4c3800e
2016-06-09 01:50:50 -07:00
James Zern
4c59aac0f9 Merge "mips msa webp configuration" 2016-06-09 05:39:53 +00:00
Pascal Massimino
043c33f1ce Merge "Improve speed and compression in backward reference for lossless." 2016-06-08 19:54:51 +00:00
Pascal Massimino
71be9b8c11 Merge "clarify variable names in HistogramRemap()" 2016-06-08 19:48:38 +00:00
Vincent Rabaud
0ba7fd70c6 Improve speed and compression in backward reference for lossless.
Change-Id: I664c5e68b036a2d424192962dbad873a2c70b826
2016-06-08 21:13:33 +02:00
Pascal Massimino
0481d42ad8 CostManager: cache one interval and re-use it when possible
In a lot of cases, only one interval is used. This can cause
a lot of malloc/free cycles for only 56 bytes. By caching this
single interval and re-using it, we remove this cycle in most
frequent cases.

Change-Id: Ia22d583f60ae438c216612062316b20ecb34f029
2016-06-08 14:10:06 +00:00
Pascal Massimino
41b7e6b56e Merge "histogram: fix bin calculation" 2016-06-08 11:59:16 +00:00
Pascal Massimino
96c3d62496 histogram: fix bin calculation
It could overflow if min==max

Change-Id: I11580328712879fe310e3d9c8c5e10835c4faf86
also: collect GetHistoBinIndex() variant into a single function
2016-06-08 13:38:00 +02:00
Pascal Massimino
fe9e31ef5e clarify variable names in HistogramRemap()
also simplify the loop by removing the initial special case

Change-Id: I4fc1b9eb14a42381a815354599137703c21ed9e6
2016-06-08 13:36:04 +02:00
Pascal Massimino
ce3c824712 disable near-lossless quantization if palette is used
Change-Id: I3335e8f97f99d6d786e953161adbf246e85d80d3
2016-06-08 11:29:48 +02:00
Parag Salasakar
e11da081f9 mips msa webp configuration
Change-Id: I886164d6d3d560b1249603d47391fddf20b5a3d4
2016-06-07 23:49:41 -07:00
Urvang Joshi
5f8f998d0e mux: Presence of unknown chunks should trigger VP8X chunk output.
As per the spec
(https://developers.google.com/speed/webp/docs/riff_container), only the
extended file format can contain an unknown chunk. So, when assembling a
WebP file with muxer, whenever there is an unknown chunk present, we
should create a VP8X chunk (even though none of the features are
present).

BUG=webp:294

Change-Id: I5da52d311e1853d40063d0f5026100d4325effaa
2016-06-06 09:25:21 -07:00
Pascal Massimino
cadec0b126 Merge "Sync mips32 and dsp_r2 YUV->RGB code with C verison" 2016-06-03 10:32:20 +00:00
Vincent Rabaud
d963775859 Compute the hash chain once and for all for lossless compression.
In some cases, the hash chain for a function is filled several
times:
- GetBackwardReferences -> CalculateBestCacheSize ->
BackwardReferencesLz77 that computes the hash chain
- GetBackwardReferences ->
(not always) BackwardReferencesTraceBackwards ->
BackwardReferencesHashChainDistanceOnly that computes the hash
chain in a slightly different way

Speed and compression performance are slightly changed (+ or -)
but will be homogneized in a later patch.

Change-Id: I43f0ecc7a9312c2ed6cdba1c0fabc6c5ad91c953
2016-06-03 11:42:13 +02:00
Jovan Zelincevic
50a486656d Sync mips32 and dsp_r2 YUV->RGB code with C verison
Change-Id: Ibe12f5ef596b8922225b95c36b67955a3f8b9ae4
2016-06-03 10:42:11 +02:00
Pascal Massimino
eee788e26a Merge "introduce a common signature for all image reader function" 2016-06-02 05:26:23 +00:00
Pascal Massimino
d77b877cc9 introduce a common signature for all image reader function
-> WebPImageReader

Introduce a variant of image-guessing function that returns a reader
directly: WebPGuessImageReader()

Change-Id: I5ddc53024fcf941e33d997b2be6aa1a963d939ab
2016-06-01 22:51:41 +00:00
Pascal Massimino
ca8d951980 remove some obsolete TODOs
Change-Id: Ied77b2dd7e3e5bb65524c0ac7b9a3fb6585cac57
2016-06-01 16:23:16 +02:00
Pascal Massimino
ae2a7222ce collect all decoding utilities from examples/ in libexampledec.a
adds a generic examples/image_dec.[ch] entry point too.

WebPGuessImageType() can be used to infer image type.

Change-Id: I8337e7b6ad91863c9cf118e4791668d2d175079b
2016-06-01 05:39:55 +00:00
Pascal Massimino
0b8ae8520f Merge "Move DitherCombine8x8 to dsp/dec.c" 2016-05-27 05:55:04 +00:00
Pascal Massimino
77cad88589 Merge "ReadWebP: avoid conversion to ARGB if final format is YUVA" 2016-05-27 05:51:15 +00:00
Pascal Massimino
ab8d669887 ReadWebP: avoid conversion to ARGB if final format is YUVA
Adds ExUtilCopyPlane() in example_utils.[ch], borrowed from
src/util/utils.h

(removes a TODO)

Change-Id: Iadfc19da3914c9439608f296e86225d279263566
2016-05-26 05:49:16 +00:00
Pascal Massimino
f8b7ce9ef1 Merge "test pointer to NULL explicitly" 2016-05-25 06:46:11 +00:00
Pascal Massimino
5df6f214e3 test pointer to NULL explicitly
Change-Id: I3de6f6b717a21c93f9d3144c66b7328b0b322853
2016-05-24 23:26:19 -07:00
Pascal Massimino
77f21c9c39 Move DitherCombine8x8 to dsp/dec.c
To be later optimized in SSE2

Change-Id: I0de9c89eb5166f3319bb4b0500150de271ecac05
2016-05-24 23:14:41 -07:00
Vincent Rabaud
c9e6d865aa Add gradle support
Change-Id: I8d522e582959e1a17605430316c1506349a7193c
2016-05-24 15:35:20 +02:00
Vincent Rabaud
c65f41e816 Revert "Add gradle support"
This reverts commit bf731ede7e.

Change-Id: Iffabc2a69a25685ba367c26f54d84c43f2c19d68
2016-05-24 10:47:36 +00:00
Vincent Rabaud
bf731ede7e Add gradle support
Change-Id: I9e5ec253897f63cb163b3f732ff844262ba07db6
2016-05-24 11:05:27 +02:00
Urvang Joshi
08333b8551 WebPAnimEncoder: Detect when canvas is modified, restore only when needed.
Change-Id: I6b45283e13c08c7d11c96500a65c75ce3637b06d
2016-05-23 11:17:23 -07:00
Pascal Massimino
0209d7e6d6 Merge "speed-up MapToPalette() with binary search" 2016-05-23 14:09:34 +00:00
Pascal Massimino
fdd29a3d3f speed-up MapToPalette() with binary search
goes from ~2% CPU to ~0.7% for large images
Change-Id: Ibd8a0fde9ba553f93157a49dcb7da0426209e404
2016-05-23 15:39:54 +02:00
James Zern
cf4a651bb8 Revert "Refactor GetColorPalette method."
This reverts commit 169004b1d5.

this changes the ABI, so should bump versions and add a note to NEWS
when we're ready to expose it

Change-Id: Ic5bbd0aee2b6fd0f9d438a9effedf22fe0cec4bf
2016-05-20 17:05:33 -07:00
James Zern
0a27aca3f8 Merge changes Idfa8ce83,I19adc9c4
* changes:
  WebPAnimEncoder: Restore original canvas between multiple encodes.
  Refactor GetColorPalette method.
2016-05-21 00:03:15 +00:00
Urvang Joshi
f25c4406e6 WebPAnimEncoder: Restore original canvas between multiple encodes.
tl;dr
We do the following:
- Start with transparent value of 0x00000000 instead of 0x00ffffff, so that
WebPCleanupTransparentAreaLossless() is a no-op.
- Restore the original canvas after lossy encoding, to discard changes made by
WebPCleanupTransparentArea() before the next encode.

Explanation of why:
In the mixed mode, anim_encoder tries to encode using both lossless and lossy
compression. In fact, when "min_size" option is enabled, there are at most 4
encodes that can happen in this order:
- lossless with dispose none
- lossy with dispose none
- lossless with dispose background
- lossy with dispose background

But both lossless and lossy both potentially modify the canvas during encode
(for better compression):
- Lossless: WebPCleanupTransparentAreaLossless() turns all transparent pixels
to 0x00000000
- Lossy: WebPCleanupTransparentArea() flattens some transparent pixels

So, the result is that, sometimes we feed the modified canvas to the encoder
instead of the original one, which isn't the right thing to do.

This also applies to just lossless or just lossy encoding, as multiple encodes
happen (with the two dispose methods) in those cases too.

Change-Id: Idfa8ce831a1627014785ba7d0316c42f72594455
2016-05-20 15:07:50 -07:00
Urvang Joshi
169004b1d5 Refactor GetColorPalette method.
This was defined (slightly differently) at two places. Created a common
method and moved to utils/utils.[hc].

Change-Id: I19adc9c48f2a4e2ec9d995e78add6f25172774c2
2016-05-20 15:06:38 -07:00
James Zern
576362abd7 VP8LDoFillBitWindow: support big-endian in fast path
Change-Id: I577944fe0b85505766050dba5ab5aec48b30f541
2016-05-20 00:31:05 -07:00
James Zern
ac49e4e4dc bit_reader.c: s/VP8L_USE_UNALIGNED_LOAD/VP8L_USE_FAST_LOAD/
no longer gate this on WEBP_FORCE_ALIGNED as WebPMemToUint32() provides
this service. replace that check with WORDS_BIGENDIAN as the block is
currently little-endian specific.

Change-Id: Ie04ec0179022d20dab53da878008ae049837782f
2016-05-19 23:14:02 -07:00
James Zern
d39ceb58ac VP8LDoFillBitWindow: remove stale TODO
the read size may be fixed, but the offsets into buf_ are not. forcing
an aligned read then shifting or using a temporary would be costly. this
is less important now that WebPMemToUint32() is being used.

Change-Id: I357fec8f750969cce91987abebed2f95e27a835f
2016-05-19 23:07:10 -07:00