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ppapi2npapi compatibility layer
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i-rinat misc: include asoundlib.h as alsa/asoundlib.h
Newer ALSA libraries drop /usr/include/alsa from list of include paths.
"alsa/" needs to be specified explicitly now. Shouldn't cause issues on
older installations, as those headers always were in "alsa/" subdirectory.
Latest commit e608336 May 27, 2019
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3rdparty correct spelling mistakes Aug 30, 2017
cmake ppb_video_decoder: use AV_ prefixed macros Dec 26, 2017
data ppb_flash_fullscreen: add config options for fullscreen window geometry Jun 15, 2018
doc rename binary to Oct 2, 2015
src misc: include asoundlib.h as alsa/asoundlib.h May 27, 2019
tests tests: use uint16_t for UTF-16 code points in charset test Dec 25, 2018
tools add encoding alias to canonical name conversion routine May 9, 2016
.editorconfig add .editorconfig file Dec 9, 2017
.gitignore update .gitignore May 6, 2015
CMakeLists.txt bump version May 24, 2019
ChangeLog doc: update ChangeLog May 24, 2019
LICENSE rename LICENSE.MIT to LICENSE, add LICENSE for ppapi headers Mar 10, 2015 doc: mention libicu-dev as a new dependency May 2, 2016


PPAPI-host NPAPI-plugin adapter.

As you know, Adobe have suspended further development of Flash player plugin for GNU/Linux. Latest available as an NPAPI plugin version 11.2 will get security updates for five years (since its release on May 4th, 2012), but further development have been ceased. Fortunately or not, newer versions are still available for Linux as a part of Chrome browser, where Flash comes bundled in a form of PPAPI plugin. PPAPI or Pepper Plugin API is an interface promoted by Chromium/Chrome team for browser plugins. It's NPAPI-inspired yet significantly different API which have every conceivable function plugin may want. Two-dimensional graphics, OpenGL ES, font rendering, network access, audio, and so on. It's huge, there are 111 groups of functions, called interfaces which todays Chromium browser offers to plugins. Although specs are not final yet, and new interface versions are arising, with some older ones getting deleted; rate of change have significantly slowed down.

For various reasons Firefox developers are not interested now in implementing PPAPI in Firefox. However that does not mean it cannot be done.

The main goal of this project is to get PPAPI (Pepper) Flash player working in Firefox. This can be done in two ways. First one is to implement full PPAPI interface in Firefox itself. Other one is to implement a wrapper, some kind of adapter which will look like browser to PPAPI plugin and look like NPAPI plugin for browser.

First approach requires strong knowledge of Firefox internals, and moreover additional effort to get the code into mainstream. Maintaining a set of patches doesn't look like a good idea. Second approach allows to concentrate on two APIs only. Yes one of them is big, but still graspable. Second way will be used for the project. It will benefit other browsers too, not only Firefox.


Mostly works. Looks like all essential APIs are implemented.

Known issues

described here.

Security note

All available Pepper Plugin API documentation usually accompanied with assertions of enhanced security due to active sandboxing usage. It's worth to note, that API itself doesn't make any sandboxing, it's only allows sandboxed implementations. This particular implementation doesn't implement any sandbox. That means if any malicious code breaks through plugin security, there is no additional barriers. This is the same level of security as NPAPI Flash have.


Project is using cmake (>=2.8.8) build system.

  • Install prerequisites.
    $ sudo apt-get install cmake gcc g++ pkg-config ragel libasound2-dev \
           libssl-dev libglib2.0-dev libpango1.0-dev libgl1-mesa-dev     \
           libevent-dev libgtk2.0-dev libxrandr-dev libxrender-dev       \
           libxcursor-dev libv4l-dev libgles2-mesa-dev libavcodec-dev    \
           libva-dev libvdpau-dev libdrm-dev libicu-dev
    $ sudo dnf install cmake gcc gcc-c++ pkgconfig ragel alsa-lib-devel openssl-devel \
           glib2-devel pango-devel mesa-libGL-devel libevent-devel gtk2-devel         \
           libXrandr-devel libXrender-devel libXcursor-devel libv4l-devel             \
           mesa-libGLES-devel  ffmpeg-devel libva-devel libvdpau-devel libdrm-devel   \
           pulseaudio-libs-devel libicu-devel

  • (optional) To enable PulseAudio support, install libpulse-dev.

  • (optional) To enable JACK support, install libjack-jackd2-dev and libsoxr-dev

  • Create a build subdirectory in the root directory, from that folder, call

    $ cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
    $ make
  • Put generated into browser plugins directory (~/.mozilla/plugins) or install system-wide by calling:
    # make install

By default make install will put plugin(s) to ${CMAKE_INSTALL_PREFIX}/lib${LIB_SUFFIX}/mozilla/plugins. The path could be changed either by changing CMake parameter CMAKE_INSTALL_PREFIX, or by setting MOZPLUGIN_INSTALL_DIR.

When loaded by browser it will search for in a directories where it can be: in Chrome (stable/beta/unstable) directory, and in /usr/lib/pepperflashplugin-nonfree/ (pepperflashplugin-nonfree puts it there). It should be enough to get it running, but if it doesn't, specify full path in ~/.config/freshwrapper.conf. You may find sample configuration file in /data. It's better to have manifest.json alongside with, actual Flash version will be taken from that manifest.

Hardware-accelerated video decoding code requires relatively new version of libavcodec (January 2013, version 54.39.0). If you don't have it yet, code won't compile unless you disable hwdec by WITH_HWDEC=0. To do so, change configuration step command to:

    $ cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DWITH_HWDEC=0 ..

Note, even if built, hardware-accelerated video decoding is still disabled by default. You need to explicitly enable it in configuration file.

Install / OpenGL|ES 2 support

Although it's better to use system implementation of OpenGL|ES 2, it's still possible to leverage ANGLE GLES2 emulation by adding WITH_GLES2=0 to cmake command line at configuration time (-DWITH_GLES2=0 to be exact). Note, that requires C++11-capable compiler.


The MIT License. See LICENSE file for full text.

Directory 3rdparty/ contains source code from 3rd parties which can be distributed under other license terms. See source code for details.

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