video: add vaapi decode and output support

This is based on the MPlayer VA API patches. To be exact it's based on
a very stripped down version of commit f1ad459a263f8537f6c from
git://gitorious.org/vaapi/mplayer.git.

This doesn't contain useless things like benchmarking hacks and the
demo code for GLX interop. Also, unlike in the original patch, decoding
and video output are split into separate source files (the separation
between decoding and display also makes pixel format hacks unnecessary).

On the other hand, some features not present in the original patch were
added, like screenshot support.

VA API is rather bad for actual video output. Dealing with older libva
versions or the completely broken vdpau backend doesn't help. OSD is
low quality and should be rather slow. In some cases, only either OSD
or subtitles can be shown at the same time (because OSD is drawn first,
OSD is prefered).

Also, libva can't decide whether it accepts straight or premultiplied
alpha for OSD sub-pictures: the vdpau backend seems to assume
premultiplied, while a native vaapi driver uses straight. So I picked
straight alpha. It doesn't matter much, because the blending code for
straight alpha I added to img_convert.c is probably buggy, and ASS
subtitles might be blended incorrectly.

Really good video output with VA API would probably use OpenGL and the
GL interop features, but at this point you might just use vo_opengl.
(Patches for making HW decoding with vo_opengl have a chance of being
accepted.)

Despite these issues, decoding seems to work ok. I still got tearing
on the Intel system I tested (Intel(R) Core(TM) i3-2350M). It was also
tested with the vdpau vaapi wrapper on a nvidia system; however this
was rather broken. (Fortunately, there is no reason to use mpv's VAAPI
support over native VDPAU.)

1 files changed, 24 insertions, 0 deletions

diff --git a/configure b/configure
index 25d755918f..8e41362e26 100755
--- a/configure
+++ b/configure
@@ -347,6 +347,7 @@ Video output:
   --enable-sdl2            enable SDL 2.0+ audio and video output [disable]
   --enable-xv              enable Xv video output [autodetect]
   --enable-vdpau           enable VDPAU acceleration [autodetect]
+  --enable-vaapi           enable VAAPI acceleration [autodetect]
   --enable-vm              enable XF86VidMode support [autodetect]
   --enable-xinerama        enable Xinerama support [autodetect]
   --enable-x11             enable X11 video output [autodetect]
@@ -421,6 +422,7 @@ _wayland=auto
 _xss=auto
 _xv=auto
 _vdpau=auto
+_vaapi=auto
 _direct3d=auto
 _sdl=no
 _sdl2=no
@@ -582,6 +584,8 @@ for ac_option do
   --disable-xv)         _xv=no          ;;
   --enable-vdpau)       _vdpau=yes      ;;
   --disable-vdpau)      _vdpau=no       ;;
+  --enable-vaapi)       _vaapi=yes      ;;
+  --disable-vaapi)      _vaapi=no       ;;
   --enable-direct3d)    _direct3d=yes   ;;
   --disable-direct3d)   _direct3d=no    ;;
   --enable-sdl)         _sdl=yes       ;;
@@ -1845,6 +1849,23 @@ fi
 echores "$_vdpau"
 
 
+echocheck "VAAPI"
+if test "$_vaapi" = auto && test "$_x11" = yes ; then
+  _vaapi=no
+  if test "$_dl" = yes ; then
+    pkg_config_add 'libva >= 0.32.0 libva-x11 >= 0.32.0' && _vaapi=yes
+  fi
+fi
+if test "$_vaapi" = yes ; then
+  def_vaapi='#define CONFIG_VAAPI 1'
+  vomodules="vaapi $vomodules"
+else
+  def_vaapi='#define CONFIG_VAAPI 0'
+  novomodules="vaapi $novomodules"
+fi
+echores "$_vdpau"
+
+
 echocheck "Xinerama"
 if test "$_xinerama" = auto && test "$_x11" = yes ; then
   _xinerama=no
@@ -3099,6 +3120,7 @@ VCD = $_vcd
 VDPAU = $_vdpau
 VDPAU_DEC = $_vdpau_dec
 VDPAU_DEC_OLD = $_vdpau_dec_old
+VAAPI = $_vaapi
 WIN32 = $_win32
 X11 = $_x11
 WAYLAND = $_wayland
@@ -3108,6 +3130,7 @@ XV = $_xv
 ENCODING = $_encoding
 
 CONFIG_VDPAU    = $_vdpau
+CONFIG_VAAPI    = $_vaapi
 CONFIG_ZLIB     = $_zlib
 
 HAVE_PTHREADS   = $_pthreads
@@ -3274,6 +3297,7 @@ $def_jpeg
 $def_mng
 $def_v4l2
 $def_vdpau
+$def_vaapi
 $def_vm
 $def_x11
 $def_wayland