GetCoeffs is (by far) the most consuming function of the decoder.
No speed change (unfortunately), but the main loop is somehow clearer.
Change-Id: I78f1c10cadc2c8696c041f5cbda86cab92cc6598
* treat the last coeff as a special case
* re-arrange the inner code to be shorter
* replace some VP8EncBands[n] by n, for n = 0 or 1
Change-Id: I71e17b014cffad7b073e787fde06260905a6953f
The main advantage is that you can avoid the use of uint64_t
some times, sticking to 32bit only.
Default still is BITS=32, this is mainly "in case".
Change-Id: Id694028793117ba822c37d46ef6c52fa0afed4ac
The binaries should have dependency on related libraries only.
For example, 'vwebp' sould not depend on libpng, libjpeg etc.
Change-Id: I517b7ae6a9092d5de891b46d0e75d07d91548e93
- Separate out mux.h and demux.h
- muxtypes.h: new header for data types common to mux/demux
- Move some misc read/write utilities to utils/utils.h
- Remove some duplicate methods.
- Separate out mux/demux libraries
Change-Id: If9b9569b10d55d922ad9317ef51710544315d6de
* fix gif2webp to handle disposal method and odd offset correctly
+ remove -scale and -crop option from vwebp, since it'll be broken
with offsets and fragments. Needs a revisit.
+ remove a warning in gif2web
Change-Id: If04c6d085806e32540f2f15a37244c4407b719b3
We don't need to use the exact forward transform,
since it's only a rough evaluation.
-> Removed some shifts and rounding constants.
Change-Id: I3fdf8b4fe9720473894155e1ad0345f4d1fd9a33
Now, its: +duration+xoffset+yoffset+disposal
+disposal can be omitted and will default to +0 (NONE)
additionally, +xoffset+yoffset can be omitted and will default to +0+0
Change-Id: I62138c9f675d4fc4408305babbcd485cb32b73d3
In particular, this removes any unnecessary FRGM/ANMF/ANIM chunks, and
indirectly leads to removal of unnecessary VP8X chunks as well.
This is especially useful for GIF to WebP conversion - it saves 56 bytes
(ANMF: 16+8 bytes, ANIM: 6+8 bytes, VP8X: 10+8 bytes) for non-animated GIFs.
Change-Id: I3b50a96ca585844c421b0fa4cd8593e52c3f95c5
This is a correction to the following change:
a00a3daf5b Use 'frgm' instead of 'tile' in
webpmux parameters
Change-Id: I8fa0bce98efdde38827fd25712017a98a6ea7388
- Allow a duration of 0
- Rename LOOP chunk to ANIM and add the background color field to it.
- Add a disposal method field for each animation frame.
- Modify webpmux.c binary interface to allow the input of background color
and disposal methods. Also make '-loop' and '-bgcolor' arguments optional
with some default values.
Change-Id: I807372a61cdb8a0d3080ae3552caf2848070bf4d
10-15% faster encoding.
Almost same output, binary wise. The main difference is
that we can't compute uv_alpha susceptibility, means there
can be subtle differences with different -sns values.
Change-Id: Id1b1a50929bf125b6372212fee1ed75a3bed975f
- Also, use the term 'fragments' instead of 'tiling' in code
- This makes code consistent with the spec.
Change-Id: Ibeccffc35db23bbedb88cc5e18e29e51621931f8
- Make ANMF and FRGM chunks hierarchical so that they encompass all chunks of
that frame.
- Use this in demuxer: stop parsing a frame if all image data for it isn't
available yet. Thus, we have a frame-level incremental support; that is,
all frames that are fully available can be parsed.
- Note: We still keep incremental support for single images - so that they can
be decoded with incremental decoding.
Change-Id: Id1585b16b06caee1d84009c42a25d2de29fa6135
Use separate fourCCs "XMP " and "EXIF" instead of a common "META"
Also, some refactorization in webpmux.c
Change-Id: Iad3337e5c1b81e785c60670ce28b1f536dd7ee31
Number of pairs selected are limited between 25% of histogram
images (at start) and number of histogram images left at any iteration.
Increase the range of iter_mult.
Removed min_cluster_size as parameter for tuning HistogramCombine.
Change-Id: Ia4068cd7af4d0f63c5af9001aceda8a40b9de740
