Prior to this commit, both encoder and decoder reset mode/mv info from
previous frame in error resilient mode to ensure bitstreams are able to
decode when there is loss of frame in decoder side. However, this is
not necessary. This commit changed to remove the reset, so encoder can
continue to use mode/mv/partition information from previously encoded
frame without affecting decodeablilty under loss of frame.
Change-Id: I0279f862900dc647fb471ae3389770bb1b9f454f
This CL changes libvpx to call a function when a frame buffer
is needed for decode. Libvpx will call a release callback when
no other frames reference the frame buffer. This CL adds a
default implementation of the frame buffer callbacks. Currently
only VP9 is supported. A future CL will add support for
applications to supply their own frame buffer callbacks.
Change-Id: I1405a320118f1cdd95f80c670d52b085a62cb10d
this ensures both are properly initialized when calling _dealloc().
+ check the arrays before access
Change-Id: I789af39b41c271b5cb3c029526581b4d9903b895
This avoids calls to get_unsigned_bits() with constants and
replaces hard to trace loops with simpler structures.
Change-Id: Ic1afc5a17d7df5bcfc85b76efda316b0bf118467
As pointed out by Dmitry and James, "partial" is a Microsoft-
specific c++ keyword, and it is renamed.
Change-Id: Ia0fc11ceb89e54b3195287f89f7e26edbbe9beb8
Implemented parallel loopfiltering, which uses existing tile-
decoding threads. Each thread works on one row, and when that row
is loopfiltered, it moves to next unattended row. To ensure the
correct filtering order, threads are synchronized and one
superblock is filtered only if the superblocks it depends on are
filtered already.
To reduce synchronization overhead and speed up the decoder, we use
nsync > 1 for high resolution.
Performance tests:
1. on desktop:
8-tile 4k video using 8 threads, speedup: 70% - 80%
4-tile HD video using 4 threads, speedup: ~35%
2. on mobile device(Nexus 7):
4-tile 1080p video using 4 threads, speedup: 18% - 25%
4-tile 1080p video using 2 threads, speedup: 10% - 15%
Change-Id: If54b4a11960dd706c22d5ad145ad94156031f36a
When showing a previously decoded frame, i.e. when
show_existing_frame=1, the update of the
last_show_frame flag must be disabled.
This is to ensure that the last_show_frame flag
reflects the state of the flag for the immediately
previously decoded frame rather then the value that
was forced to ensure that a previously decoded frame
would be displayed.
This patch also adds a test vector to verify that the
display_existing_frame flag works as expected. Code
for generating the test vector can be found in this
patch:
https://gerrit.chromium.org/gerrit/#/c/68581/
(Bug originally reported by Alexander Voronov
<ru.xalba@gmail.com>).
Change-Id: I731d288fba02088959f7fcc87707137fffc6acf5
Encoder's boarder is still 160, while decoder's boarder will be 32.
With on demand and separate boarder buffer for boarder extension.
The decoder's boarder does not need to to 160 anymore.
Change-Id: I93d5aaff15a33a2213e9761eaa37c5f2870747db
When showing a previously decoded frame, we need to
explicitly set the show_frame flag.
For the current frame being decoded this flag is
explicitly set in the frame header.
This should fix WebM Issue 696:
http://code.google.com/p/webm/issues/detail?id=696
Change-Id: I5751a809813f88d2ca6f62c47c3878475ff9ba8d
This commit removes the use of best_mv in the decoding process. This
variable can be replaced with nearest_mv. It saves a few cycles on
assigning the values for best_mv.
Change-Id: Ic183f9c1fb615c54efd7e6ccfedcf09d493435e4
Adding RefBuffer to simplify reference buffer management. The struct has a
pointer to image data and scale factors relative to the current frame.
Change-Id: If38eb1491ff687cc11428aee339f3e052e2c5d9e
Moving back to scale_factors struct. We don't need anymore x_offset_q4 and
y_offset_q4 because both values are calculated locally inside vp9_scale_mv
function.
Change-Id: I78a2122ba253c428a14558bda0e78ece738d2b5b
Guard against incorrect size values moving *data past data_end.
Check read length against the difference of the buffers.
Change-Id: Ie0b54e2db517fd41a0f3ceb23402ee44839a4739
reorder the tiles based on size and their presumed complexity. this
minimizes the cases where the main thread is waiting on a worker to
complete.
Change-Id: Ie80642c6a1d64ece884f41683d23a3708ab38e0c
- Disable mode info update in case where current frame is coded
as "show existing frame".
- Should fix issue 676.
Change-Id: Ibee681850eb307f982da6528d3e31cb94f881c08
The old code would start in a mixed state, where all the reference
frames were pointing to frame buffer 0, but the reference counts
were 0. This is why we needed special code for the first frame.
Change-Id: I734961012917654ff8c0c8b317aac00ab75ded1a
In the decoder we don't need to save eobs, we can pass eob as an argument.
That's why removing eob arrays from VP9Decompressor and TileWorkerData,
and moving eob pointer from macroblockd_plane to macroblock_plane.
Change-Id: I8eb919acc837acfb3abdd8319af63d1bbca8217a
The difference with the old code is that originally the whole token_cache
was initialized with zeros at the beginning of decode_coefs() function.
Now we set several zero values explicitly with "token_cache[scan[c]] = 0".
Change-Id: I88cc5031f01d13012d1a4491739c36cb44f9401e
Removing goto and using while loop instead, renaming seg_eob to max_eob,
moving eob token counter increment.
Change-Id: Idcc4b3a45e4f313596a71776aef56691a6647e5f
We only need qcoeff buffers in the encoder. Reducing TileWorkerData struct
and VP9Decompressor struct sizes by 24K.
Change-Id: Id148868461f7ffa3d3dd634b371503ae9c57e207
Renaming treed_read() to consistent vp9_read_tree() and moving it from
deleted vp9_treereader.h to vp9_dboolhuff.h file.
Change-Id: Iedd8655acbe25e4fcf62b79e5a13bdea69b6b004
The decoder will construct inter predictor using lazy border extension,
while the encoder, going with multiple runs of motion search in the rate-
distortion optimization loop for each block, does border extension at
frame level. This commit makes separate the inter predictors for encoder
and decoder, respectively.
Change-Id: Ieca2fecba3a7201a6d64ef9f219e5d91e50559c3
This commit takes out vp9_extend_frame_borders from
vp9_setup_scale_factors.
The refactoring is for the preparation of the use of lazy border
extension at decoder. This makes it necessary to handle border
extension separately at encoder/decoder. The use of
vp9_extend_frame_borders will be removed, when lazy border extension
is ready.
Change-Id: Ia3baba3d179d5f11eee1634f19b3b319d2a59186
