av1_init_scan_order
initialize data structures related to adaptive scan order
av1_update_scan_prob
update nonzero probabilities from nonzero counts
av1_augment_prob
embed r + c and coeff_idx info with nonzero probabilities.
When sorting the nonzero probabilities, if there is a tie,
the coefficient with smaller r + c will be scanned first
av1_update_sort_order
apply quick sort on nonzero probabilities to obtain a sort order
av1_update_scan_order
apply topological sort on the nonzero probabilities sorting order to
guarantee each to-be-scanned coefficient's upper and left coefficient
will be scanned before the to-be-scanned coefficient.
av1_update_neighbors
For each coeff_idx in scan[], update its above and left neighbors in
neighbors[] accordingly.
Change-Id: I64c4938057daf8e30e48609a00ecc08d2e3062f4
Plus a small code clean up. The experiment of EXT_REFS, compared against
the baseline, using Overall PSNR, now obtains a gain on lowres as:
Avg: -5.818; BDRate: -5.653
Compared against the previous EXT_REFS results on lowres, a tiny gain is
obtained as:
Avg: -0.047, BDRate: -0.063
(1) 780952 Add encoder first pass support to bi-prediction in EXT_REFS
(2) f91498 Add pred prob handling for new references in EXT_REFS
(3) e91472 Add decoder support for bi-direct prediction in EXT_REFS
(4) 0dbac9 Add encoder support to new references in EXT_REFS
(5) ad70cc Remove hard-coded number for EXT_REFS
(6) 9c1e2f Add the use of new reference frames at encoder in EXT_REFS
(7) 6d4fde Add the experiment flag of EXT_REFS
Change-Id: I26f7ca45b9ede7579fdb9d0d6a1a91f4334599bd
- Use range check function to avoid DCT_DCT overflow.
We need to re-develop the column txfm side scaling/rounding. Now,
we prefer to maintain the current BDRate level.
- Encoder user level time reduction <1% owing to av1_fht32x32_avx2.
- Add MemCheck unit test and fdct32() unit test.
Change-Id: I1e67030f67bc637859798ebe2f6698afffb8531c
The tell functions return an unsigned integer.
This causes the AV1.TestTell test case to fail because
-1 is greater than 20 when treated as an unsigned integer.
Change-Id: I9dd1d7eb61260d30d1713a4917159fc6fe8eee42
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
This commit changes to send frame size explicitly when
error_resilient_mode=1. Purpose is to allow parsing of bitstream
after a packet loss.
Change-Id: I7d1c010a465aa18914762cc1a3e61db377304c08
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
Now that all warnings are taken care of, add warning flag -Wshadow to
configure.
Note: Enabling this flag for C++ generates some useless warnings about
some function parameters shadowing class member function names. So, only
enabling this warning for C code.
Cherry-picked from aomedia/master: b96cbc4
Change-Id: I3922dea2e6976b16519c4aa4d1bd395c198134f1
The tx_partition_set_contexts function changes tx_size even
for blocks coded with a rectangular transform.
This causes an internal rd inconsistency when using all of
CONFIG_VAR_TX, CONFIG_RECT_TX, CONFIG_EXT_TX.
Change-Id: Ia45d4a8893b0961534219bb96d9652719038c7a1
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
