The actual work is done by the existing SDL code. This commit merely
makes it possible to explicitly select the SDL backend ("gl" alone
uses SDL only if the X11 and win32 backends are not available, while
the new "gl_sdl" always forces use of SDL).
Also disable YUV conversion method autodetection when SDL is used.
This gets rid of a temporary window that appears for a moment and is
immediately closed again. SDL can't deal with the VOFLAG_HIDDEN flag,
which is needed to create an invisible GL context (when the
autodetection is run, the video size isn't yet known to the VO, and
creating a window then resizing would cause problems with window
placement). Instead always pick the fragment program method by default
(yuv=2). This change affects the normal "gl" VO too if it chooses the
SDL backend.
Compiling with full features requires development files for several
external libraries. Below is a list of some important requirements. For
more information see the output of './configure --help' for a list of options,
or look at the list of enabled and disabled features printed after running
'./configure'. If you think you have support for some feature installed
but configure fails to detect it, the file config.log may contain information
about the reasons for the failure.
Libraries specific to particular video output methods
(you'll want at least one of VDPAU, GL or Xv):
- libvdpau (for VDPAU output, best choice for NVIDIA cards)
- libGL (OpenGL output)
- libXv (XVideo output)
general:
- libasound (ALSA audio output)
- various general X development libraries
- libfreetype
- libfontconfig
- libass
- FFmpeg libraries (libavutil libavcodec libavformat libswscale libpostproc)
Most of the above libraries are available in suitable versions on normal
Linux distributions. However FFmpeg is an exception (distro versions may be
too old to work at all or work well). For that reason you may want to use
the separately available build wrapper that first compiles FFmpeg libraries
and libass, and then compiles the player statically linked against those.
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