This patch removes the component_entry_point library, which used to proved a hook for the libc to intercept the call of the 'Component::construct' function. The mechansim has several shortcomings (see the discussion in the associated issue) and was complex. So we eventually discarded the approach in favor of the explicit handling of the startup. A regular Genode component provides a 'Component::construct' function, which is determined by the dynamic linker via a symbol lookup. For the time being, the dynamic linker falls back to looking up a 'main' function if no 'Component::construct' function could be found. The libc provides an implementation of 'Component::construct', which sets up the libc's task handling and finally call the function 'Libc::Component::construct' from the context of the appllication task. This function is expected to be provided by the libc-using application. Consequently, Genode components that use the libc have to implement the 'Libc::Component::construct' function. The new 'posix' library provides an implementation of 'Libc::Component::construct' that calls a main function. Hence, POSIX programs that merely use the POSIX API merely have to add 'posix' to the 'LIBS' declaration in their 'target.mk' file. Their execution starts at 'main'. Issue #2199 |
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avplay_slave.h | ||
control_bar.cpp | ||
control_bar.h | ||
filter_framebuffer_slave.h | ||
framebuffer_service_factory.h | ||
main_window.cpp | ||
main_window.h | ||
main.cpp | ||
qt_avplay.pro | ||
README | ||
style.qrc | ||
style.qss | ||
target.mk |
This directory contains a simple Qt-based media player which is actually a graphical user interface for the SDL-based 'avplay' media player from 'libav'. It starts 'avplay' as a child and shows its graphical output in a 'QNitpickerViewWidget'. The widgets for controlling the player state send the according keyboard and mouse input events to 'avplay'. The 'qt_avplay' player supports the following configuration options: :'<mediafile name="..."/>:' name of the media file to play :'<framebuffer_filter name="..." ram_quota="..."/>': This node contains the name of a framebuffer filter service to filter the video output. It may appear multiple times. If specified more than once, it is possible to build a post-processing pipeline for the video display where each processing stage is executed by a separate program.