This allows the compositor to optimize redraws and cull away changes
obscured by the video surface.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Reset, i.e. destroy then create, the decoder in _setcaps() handler only
if the underlying codec type actually changed. This makes it possible
to be more tolerant with certain MPEG-2 streams that get parsed to
form caps that are compatible with the previous state but minor changes
to "codec-data".
Add new gst_vaapi_codec_from_caps() helper to determine codec type from
the specified caps. Don't globally expose this function since this is
really trivial and only used in the vaapidecode element.
Previously, vaapidecode would wait up to one second until a free surface
is available, or it aborts decoding. Now, vaapidecode waits until the
last decoded surface was to be presented, plus one second. Besides, end
times are now expressed relative to the monotonic clock.
Make it possible to specify the maximum number of references to use within
a single VA context. This helps reducing GPU memory allocations to the useful
number of references to be used.
When playback stops the GstVaapiDecode object is reset into a clean
state. However, surfaces may still be referenced by library users and
unreferencing them after the reset triggers an access to an unset mutex.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Forward declaring enums is not allowed by the C standard and aborts
compilation if the header file is included in a C++ project.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
If either dimension is out-of-bounds, then scale window to fit the
display size, even if the output is to be rotated. Use the standard
gst_video_sink_center_rect() function to center and scale the window
wrt. the outer (display) bounds.
Keep VA surface proxy associated with the surface that is currently
being displayed. This makes sure that surface is not released back
to the pool of surfaces free to use for decoding. This is necessary
with VA driver implementations that support rendering to an overlay
pipe. Otherwise, there could be cases where we are decoding into a
surface that is being displayed, hence some flickering.
Some VA drivers (e.g. EMGD) can have completely random values for initial
display attributes. So, try to improve the discovery process to check the
initial display attribute values actually fall within valid bounds. If not,
try to reset those to some sensible values like the default value reported
through vaQueryDisplayAttributes().
Use g_object_class_install_properties() to install GstVaapiDisplay properties.
It is useful to maintain properties as GParamSpec so that to be able to raise
"notify" signals by id instead of by name in the future.
A rendering mode can be "overlay" or "texture"'ed blit.
The former mode implies that a VA surface used for rendering can't be
re-used right away for decoding, so the sink shall make provisions to
retain the associated surface proxy until the next surface is to be
displayed.
The latter mode implies that the VA surface is implicitly copied to an
intermediate backing store, or back buffer of a frame buffer, so the
associated surface proxy can be disposed right away.
The VA display attributes are mapped to properties so that to maintain the
GStreamer terminology. Properties are to be identified by name, but internal
functions are available to lookup the property by the actual VA display
attribute type.
decode_current_picture() was converted to return a gboolean instead
of a GstVaapiDecoderStatus, so we were not getting out of the decode
loop as expected, or could cause an error instead.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Integrate the start code prefix in the slice data buffer that is submitted
to the hardware. VA-API specifies that slice_data_offset is the offset to
the first byte of slice data. And, for MPEG-2, slice() data begins with
the slice_start_code. Some VA driver implementations (EMGD) expect this.
