This experiment performs symbol-by-symbol statistics
adaptation for non-binary symbols. It requires DAALA_EC or
RANS and ANS to be enabled. The adaptation is currently
based on a simple recursive filter and is taken from
Daala. It has an adaptation rate dependent on alphabet size,
taken from Daala. It applies wherever non-binary symbols
are encoded using Cumulative Probability Functions rather
than trees.
Where symbols are adapted, forward updates in the compressed
header are removed.
In the case of RANS coefficient token values are adapted,
with the exception of the zero token which remains a
binary symbol. In the case of DAALA_EC other values
such as inter and intra modes are adapted as CDFs are
provided in those cases.
The experiment is configured with:
./configure --enable-experimental --enable-daala-ec --enable-ec-adapt
or
./configure --enable-experimental --enable-ans --enable-rans \
--enable-ec-adapt
EC_ADAPT is not currently compatible with tiles.
BDR results on Objective-1-fast give a small loss:
PSNR YCbCr: 0.51% 0.49% 0.48%
PSNRHVS: 0.50%
SSIM: 0.50%
MSSSIM: 0.51%
CIEDE2000: 0.50%
Change-Id: I3888718e42616f3fd87144de7f125228446ac984
- Change FDCT32x32_2D_AVX2 output parameter to tran_low_t.
- Add unit tests for CONFIG_AOM_HIGHBITDEPTH=1.
- Update TODO notes.
BUG=webm:1323
Change-Id: If4766c919a24231fce886de74658b6dd7a011246
Cherry-pick Daala b5020bee:
Remove redundant test in od_ec_decode_bool_q15().
Using a test that decodes 100M random binary symbols, making this change
produced a speed up of 8.81% with gcc-4.9.3 and 3.71% with clang-3.7.1,
both compiled with -O2.
Change-Id: If6d0077a56121a575ae53bcd4d1d9b7d800a317d
* changes:
Palette: Use inverse_color_order to find color index faster.
Rewrite some loops to avoid -Wunsafe-loop-optimizations warnings.
Remove some useless casts
Add compiler warning flag -Wextra and fix related warnings.
Declare some array sizes to be constants (known at compile time).
Note: some of these warnings are enabled by a combination of -Wunused
(added earlier) and -Wextra.
Cherry-picked from aomedia/master: 4790a69
Change-Id: I322a1366bd4fd6c0dec9e758c2d5e88e003b1cbf
* changes:
Define SIMD_INLINE using AOM_FORCE_INLINE
AOM_FORCE_INLINE: fix always_inline attribute
Free memory allocated by daala_ec encoder.
Move clpf_sse4_1.c to clpf_sse4.c in agreement with convention
sync avg_test.cc with aom/master
Free the two memory buffers allocated by the daala_ec encoder when
calling od_ec_enc_clear() from aom_daala_stop_encode().
Change-Id: If20e86374ea29e51ee59111012905e56039dd4cc
The (new) ans experiment replaces the bool coder with uABS bools. The
'rans' experiment adds multisymbol coding.
This matches the setup in aom/master.
Change-Id: Ida8372ccabf1e1e9afc45fe66362cda35a491222
* changes:
Fix warnings reported by -Wshadow: Part4: main directory
Fix warnings reported by -Wshadow: Part3: test/ directory
Fix warnings reported by -Wshadow: Part2b: more from av1 directory
Fix warnings reported by -Wshadow: Part2: av1 directory
Fix warnings reported by -Wshadow: Part1b: scan_order struct and variable
Fix warnings reported by -Wshadow: Part1: aom_dsp directory
Move STAT_TYPE enum to source file.
Code cleanup: mainly rd_pick_partition and methods called from there.
The bit accounting functions aom_reader_tell() and aom_reader_tell_frac()
return the number of bits and 1/8th bits respectively.
This patch changes the return type from ptrdiff_t which is signed to
uint32_t which is unsigned.
The size_t type is not used since we only care about the number of bits
or 1/8 bits per entropy coder context and we don't expect to code more
than 512 megabits per tile.
Change-Id: I84a119d1f52829dcbdb66a92656eacca06e42b11
This patch adds bit account infrastructure to the bit reader API.
When configured with --enable-accounting, every bit reader API
function records the number of bits necessary to decoding a symbol.
Accounting symbol entries are collected in global accounting data
structure, that can be used to understand exactly where bits are
spent (http://aomanalyzer.org). The data structure is cleared and
reused each frame to reduce memory usage. When configured without
--enable-accounting, bit accounting does not incur any runtime
overhead.
All aom_read_xxx functions now have an additional string parameter
that specifies the symbol name. By default, the ACCT_STR macro is
used (which expands to __func__). For more precise accounting,
these should be replaced with more descriptive names.
Change-Id: Ia2e1343cb842c9391b12b77272587dfbe307a56d
While we are at it:
- Rename some variables to more meaningful names
- Reuse some common consts from a header instead of redefining them.
Cherry-picked from aomedia/master: 09eea2193
Change-Id: I61030e773137ae107d3bd43556c0d5bb26f9dbf8
This commit ports the following from aom/master:
4c46278 Add aom_reader_tell() support.
b9c9935 Remove an erroneous declaration.
56c9c3b Fix ANS build.
Change-Id: I59bd910f58c218c649a1de2a7b5fae0397e13cb1
Cherry-pick Daala 211c2a41: Clean up EC tell() and tell_frac() functions.
Add a const qualifier to the od_ec_enc and od_ec_dec parameters of
the od_ec_enc_tell(), od_ec_enc_tell_frac(), od_ec_dec_tell(), and
od_ec_dec_tell_frac() functions.
Add an OD_WARN_UNUSED_RESULT to od_ec_enc_tell_frac().
Change-Id: Ia50e2fd75e98d8a03d993449d658b695cf56e6fb
The formatting of OD_UNIFORM_CDFS_Q15[] in entcode.c is helpful for
for understanding what is contained in the array (e.g., the uniform
probability distributions of small sizes 2 through 16).
This patch reverts the change made in f4b2926d and adds linter hints to
ignore the formatting.
Change-Id: I2ad9fe6673b86e6067cb97b40f0f0e69a119cdf5
* changes:
Add missing CONFIG_DAALA_EC declaration.
Add API for writing trees using a CDF.
Add macro to build a simple cdf table.
Use Daala entropy coder to code trees.
Silence clang-format code review warning.
Use Daala entropy coder to code bits.
Clear existing format issue in the codebase
Add Daala entropy coder.
Move the av1_indices_from_tree() function from av1/encoder/treewriter.c
to aom_dsp/prob.c so that it can be used by both the encoder and
the decoder.
Change-Id: Ie43c599f425c3503b1ff93f0c77b5033a05b1bb4
Without first including ./aom_config.h in aom_dsp/prob.c the memmove
function is implicitly defined and causes a compiler warning.
Change-Id: I339d0389f10324a1085aba7d6492b2159a14da92
Added aom_write_tree_cdf() and aom_read_tree_cdf() function calls to
bitwriter.h and bitreader.h respectively.
These calls take a multisymbol CDF and an index and directly encode the
symbol using the enabled entropy coder.
Currently only the daala entropy encoder supports this (enabled with
--enable-daala_ec) and a compile error is thrown otherwise.
Change-Id: I2fa1e87af4352c94384e0cfdbfd170ac99cf3705
Thomas
Debargha Mukherjee
David Barker
Alex Converse
Luca Barbato
Yi Luo
Yaowu Xu
Jingning Han
Nathan E. Egge
Angie Chiang
Steinar Midtskogen
Urvang Joshi
Michael Bebenita