1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
# Enabling hardware <video> decode codepaths on linux
Hardware acceleration of video decode on Linux is
[unsupported](https://crbug.com/137247) in Chrome for user-facing builds. During
development (targeting other platforms) it can be useful to be able to trigger
the code-paths used on HW-accelerated platforms (such as CrOS and win7) in a
linux-based development environment. Here's one way to do so, with details based
on a gprecise setup.
* Install pre-requisites: On Ubuntu Precise, at least, this includes:
```shell
sudo apt-get install libtool libvdpau1 libvdpau-dev
```
* Install and configure [libva](http://cgit.freedesktop.org/libva/)
```shell
DEST=${HOME}/apps/libva
cd /tmp
git clone git://anongit.freedesktop.org/libva
cd libva
git reset --hard libva-1.2.1
./autogen.sh && ./configure --prefix=${DEST}
make -j32 && make install
```
* Install and configure the
[VDPAU](http://cgit.freedesktop.org/vaapi/vdpau-driver) VAAPI driver
```shell
DEST=${HOME}/apps/libva
cd /tmp
git clone git://anongit.freedesktop.org/vaapi/vdpau-driver
cd vdpau-driver
export PKG_CONFIG_PATH=${DEST}/lib/pkgconfig/:$PKG_CONFIG_PATH
export LIBVA_DRIVERS_PATH=${DEST}/lib/dri
export LIBVA_X11_DEPS_CFLAGS=-I${DEST}/include
export LIBVA_X11_DEPS_LIBS=-L${DEST}/lib
export LIBVA_DEPS_CFLAGS=-I${DEST}/include
export LIBVA_DEPS_LIBS=-L${DEST}/lib
make distclean
unset CC CXX
./autogen.sh && ./configure --prefix=${DEST} --enable-debug
find . -name Makefile |xargs sed -i 'sI/usr/lib/xorg/modules/driversI${DEST}/lib/driIg'
sed -i -e 's/_(\(VAEncH264VUIBufferType\|VAEncH264SEIBufferType\));//' src/vdpau_dump.c
make -j32 && rm -f ${DEST}/lib/dri/{nvidia_drv_video.so,s3g_drv_video.so} && make install
```
* Add to args.gn:
* `target_os = "chromeos"` to link in `VaapiVideoDecodeAccelerator`
* `proprietary_codecs = true` and `ffmpeg_branding = "Chrome"` to
allow Chrome to play h.264 content, which is the only codec
VAVDA knows about today.
* Rebuild chrome
* Run chrome with `LD_LIBRARY_PATH=${HOME}/apps/libva/lib` in the environment,
and with the `--no-sandbox` command line flag.
* If things don't work, a Debug build (to include D\*LOG's) with
`--vmodule=*content/common/gpu/media/*=10,gpu_video*=1` might be
enlightening.
** note
NOTE THIS IS AN UNSUPPORTED CONFIGURATION AND LIKELY TO BE BROKEN AT ANY
POINT IN TIME
**
This page is purely here to help developers targeting supported HW `<video>`
decode platforms be more effective. Do not expect help if this setup fails to
work.
|
