| Age | Commit message (Collapse) | Author |
|---|
|
In order to understand memory layout consider the declaration of the
following structs. The first one is a part of our API:
struct vpx_codec_ctx {
// ...
struct vpx_codec_priv *priv;
};
The second one is defined in vpx_codec_internal.h:
struct vpx_codec_priv {
// ...
};
The following struct is defined 4 times for encoder/decoder VP8/VP9:
struct vpx_codec_alg_priv {
struct vpx_codec_priv base;
// ...
};
Private data allocation for the given ctx:
struct vpx_codec_ctx *ctx = <get>
struct vpx_codec_alg_priv *alg_priv = <allocate>
ctx->priv = (struct vpx_codec_priv *)alg_priv;
The cast works because vpx_codec_alg_priv has a
vpx_codec_priv instance as a first member 'base'.
Change-Id: I10d1afc8c9a7dfda50baade8c7b0296678bdb0d0
|
|
Change-Id: I3e319f581215ccb814afca247c1d911be231a4ac
|
|
The iface pointer is already in vpx_codec_ctx struct.
Change-Id: I9fffe27c613a7c94476f185a1e5a53ff6d99f1c6
|
|
|
|
the bulk of the functionality was removed in:
a42b5c2 Removing legacy XMA features from libvpx.
BUG=840
Change-Id: I8ca51d6aa76028f36d0eb1a15d2f2e3161e12ea4
|
|
When a valid data pointer is given make sure the size is greater than
zero.
A previous check for vp9 was incorrectly removed in:
7050074 Make the api behavior conform to api spec.
No semantics for valid pointers + 0-sized frames are defined for VPx
codecs, so move the check to vpx_codec_decode(). This avoids an assert
in vp9.
+ add some basic invalid param testing for decoder init/decode/destroy
Change-Id: I99f9cef6076d15874fd72ac973f2685d8a2353c3
|
|
Change-Id: I60ffee7cf78e748792fa6d109322ec32f92e40a9
|
|
Added support for external frame buffers to libvpx's VP9 decoder.
If the external frame buffer functions are set then libvpx will
call the get function whenever it needs a new frame buffer to
decode a frame into. And it will call the release function
whenever there are no more references to that buffer.
Change-Id: Id2934d005f606af6e052fb6db0d5b7c02f567522
|
|
A future CL will add external frame buffers
differently.
Squash commit of four revert commits:
Revert "Increase required number of external frame buffers"
This reverts commit 9e41d569d7c84dd9ca8f0047c15377a883945685.
Revert "Add external constants."
This reverts commit bbf53047b03106e3c2e24b28cb836cc838db5ee8.
Revert "Add frame buffer lru cache."
This reverts commit fbada948fa345e67acf9aa41a8f9a78f5dfe8648.
Conflicts:
vpxdec.c
Change-Id: I76fe42419923a6ea6c75d9997cbbf941d73d3005
Revert "Add support to pass in external frame buffers."
This reverts commit 10f891696bc4c972c13cc9fde2c53470501a03e2.
Conflicts:
test/external_frame_buffer_test.cc
vp9/common/vp9_alloccommon.c
vp9/common/vp9_reconinter.c
vp9/decoder/vp9_decodeframe.c
vp9/encoder/vp9_onyx_if.c
vp9/vp9_dx_iface.c
vpx/vpx_decoder.h
vpx/vpx_external_frame_buffer.h
vpx_scale/generic/yv12config.c
vpxdec.c
Change-Id: I7434cf590f1c852b38569980e4247fad0d939c2e
|
|
VP9 decoder can now use frame buffers passed in by the application.
Change-Id: I599527ec85c577f3f5552831d79a693884fafb73
|
|
Change-Id: Idfbd87d0a4bebdce7dd587c8446e7fa75b030d91
|
|
Modify the decoder to return the ending position of the bool decoder and
use that as the starting position for the next frame.
The constant-space algorithm for parsing the appended frame lengths is
O(n^2), which is a potential DoS concern if n is unbounded. Revisit
the appended lengths for use as partition lengths when multipartition
support is added.
In addition, this allows decoding of raw streams outside of a container
without additional framing information, though it's insufficient to
be able to remux said stream into a container.
Change-Id: I71e801a9c3e37abe559a56a597635b0cbae1934b
|
|
frames" into experimental
|
|
The altref frame is packed along with the next P frame. So that
outside of the codec there are now only two types of frames P and I.
Also, now it is one frame in and one frame out with respect to the
codec. Apart from that, all the frames are length encoded with the
length of each frame appended to the frame itself. There are
two categories of frames and each of them will look as follows:
- Packed frames (an altref along with the succeeding p frame)
- altref_frame_data | altref_lenngth | frame_data | length
- Unpacked frames (all frames other than the above)
- frame_data | length
Change-Id: If1eabf5c473f7d46b3f2d026bd30c803588c5330
|
|
Change-Id: I44b3ad780cef6f448fa17ff8e28fea87ef9cd518
|
|
Approximate the Google style guide[1] so that that there's a written
document to follow and tools to check compliance[2].
[1]: http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml
[2]: http://google-styleguide.googlecode.com/svn/trunk/cpplint/cpplint.py
Change-Id: Idf40e3d8dddcc72150f6af127b13e5dab838685f
|
|
This is a code snapshot of experimental work currently ongoing for a
next-generation codec.
The codebase has been cut down considerably from the libvpx baseline.
For example, we are currently only supporting VBR 2-pass rate control
and have removed most of the code relating to coding speed, threading,
error resilience, partitions and various other features. This is in
part to make the codebase easier to work on and experiment with, but
also because we want to have an open discussion about how the bitstream
will be structured and partitioned and not have that conversation
constrained by past work.
Our basic working pattern has been to initially encapsulate experiments
using configure options linked to #IF CONFIG_XXX statements in the
code. Once experiments have matured and we are reasonably happy that
they give benefit and can be merged without breaking other experiments,
we remove the conditional compile statements and merge them in.
Current changes include:
* Temporal coding experiment for segments (though still only 4 max, it
will likely be increased).
* Segment feature experiment - to allow various bits of information to
be coded at the segment level. Features tested so far include mode
and reference frame information, limiting end of block offset and
transform size, alongside Q and loop filter parameters, but this set
is very fluid.
* Support for 8x8 transform - 8x8 dct with 2nd order 2x2 haar is used
in MBs using 16x16 prediction modes within inter frames.
* Compound prediction (combination of signals from existing predictors
to create a new predictor).
* 8 tap interpolation filters and 1/8th pel motion vectors.
* Loop filter modifications.
* Various entropy modifications and changes to how entropy contexts and
updates are handled.
* Extended quantizer range matched to transform precision improvements.
There are also ongoing further experiments that we hope to merge in the
near future: For example, coding of motion and other aspects of the
prediction signal to better support larger image formats, use of larger
block sizes (e.g. 32x32 and up) and lossless non-transform based coding
options (especially for key frames). It is our hope that we will be
able to make regular updates and we will warmly welcome community
contributions.
Please be warned that, at this stage, the codebase is currently slower
than VP8 stable branch as most new code has not been optimized, and
even the 'C' has been deliberately written to be simple and obvious,
not fast.
The following graphs have the initial test results, numbers in the
tables measure the compression improvement in terms of percentage. The
build has the following optional experiments configured:
--enable-experimental --enable-enhanced_interp --enable-uvintra
--enable-high_precision_mv --enable-sixteenth_subpel_uv
CIF Size clips:
http://getwebm.org/tmp/cif/
HD size clips:
http://getwebm.org/tmp/hd/
(stable_20120309 represents encoding results of WebM master branch
build as of commit#7a15907)
They were encoded using the following encode parameters:
--good --cpu-used=0 -t 0 --lag-in-frames=25 --min-q=0 --max-q=63
--end-usage=0 --auto-alt-ref=1 -p 2 --pass=2 --kf-max-dist=9999
--kf-min-dist=0 --drop-frame=0 --static-thresh=0 --bias-pct=50
--minsection-pct=0 --maxsection-pct=800 --sharpness=0
--arnr-maxframes=7 --arnr-strength=3(for HD,6 for CIF)
--arnr-type=3
Change-Id: I5c62ed09cfff5815a2bb34e7820d6a810c23183c
|
|
Adding capabilities with which the encoder can output frames
partition by partition, and the decoder can get input data
partition by partition.
Change-Id: Ieae0801480b8de8cd43c3c57dd3bab2e4c346fe0
|
|
The error-concealer is plugged in after any motion vectors have been
decoded. It tries to estimate any missing motion vectors from the
motion vectors of the previous frame. Intra blocks with missing
residual are replaced with inter blocks with estimated motion vectors.
This feature was developed in a separate sandbox
(sandbox/holmer/error-concealment).
Change-Id: I5c8917b031078d79dbafd90f6006680e84a23412
|
|
Make sure the given interface is actually a decoder interface before
initializing it.
Change-Id: Ie48d737f2956cc2f0891666de5ea87251e96bc49
|
|
- correct spelling
- remove explicit file name w/\file (unnecessary when contained in the
same file and prone to desync)
Change-Id: I68a3960ac5ab84d0f2e5c9b2e29799f26dfccf23
|
|
Change-Id: I5744269a35e2d696ecf40c1665efd572bfc9b6cb
|
|
A new vpx_codec_control called VP8D_GET_FRAME_CORRUPTED. The output
from the function is non-zero if the last decoded frame contains
corruption due to packet losses.
The decoder is also modified to accept encoded frames of zero length.
A zero length frame indicates to the decoder that one or more frames
have been completely lost. This will mark the last decoded reference
buffer as corrupted. The data pointer can be NULL if the length is
zero.
Change-Id: Ic5902c785a281c6e05329deea958554b7a6c75ce
|
|
Changes 'The VP8 project' to 'The WebM project', for consistency
with other webmproject.org repositories.
Fixes issue #97.
Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba
|
|
When the license headers were updated, they accidentally contained
trailing whitespace, so unfortunately we have to touch all the files
again.
Change-Id: I236c05fade06589e417179c0444cb39b09e4200d
|
|
Change-Id: Ib82de60cf32cf08844c3e2d88d7c587396f3892c
|
|
Change-Id: Ieebea089095d9073b3a94932791099f614ce120c
|
|
vpx_codec.mk: Select required sources based on CONFIG_{EN,DE}CODERS.
Relocate _dec_init_ver to vpx_decoder.c to match vpx_encoder.
Change-Id: I6a171bc497499040912b2fb17786fba21a8ebc56
|
|
This renames the vpx_codec/ directory to vpx/, to allow applications
to more consistently reference these includes with the vpx/ prefix.
This allows the includes to be installed in /usr/local/include/vpx
rather than polluting the system includes directory with an
excessive number of includes.
Change-Id: I7b0652a20543d93f38f421c60b0bbccde4d61b4f
|
