Fix calculation of MCU count for image sizes that are not a multiple
of 8 pixels in either dimension, but also for non-common sampling
factors like 4:2:2 in non-interleaved mode.
Add support for images with multiple scans per frame. The Huffman table
can be updated before SOS, and thus possibly requiring multiple uploads
of Huffman tables to the VA driver. So, the latter must be able to cope
with multiple VA buffers of type 'huffman-table' and with the correct
sequential order.
Improve robustness when some expected packets where not received yet
or that were not correctly decoded. For example, don't try to decode
a picture if there was no valid frame headers.
Improve debugging and error messages. Rename a few variables to fit the
existing naming conventions. Change some fatal asserts to non-fatal
error codes.
Split the input buffer data into decoder units that represent a JPEG
segment. Handle scan decoder unit specifically so that it can include
both the scan header (SOS) but also any other ECS or RSTi segment.
That way, we parse the input buffer stream only once at the gst-vaapi
level instead of (i) in gst_vaapi_decoder_jpeg_parse() to split the
stream into frames SOI .. EOI and (ii) in decode_buffer() to further
determine segment boundaries and decode them.
In practice, this is a +15 to +25% performance improvement.
Fix decode_buffer() function to gracefully skip comment (COM) segments.
This fixes decoding of streams generated by certain cameras, e.g. like
the Logitech Pro C920.
https://bugzilla.gnome.org/show_bug.cgi?id=708208
Signed-off-by: Junfeng Xu <jun.feng.xu@intel.com>
Look for the exact image bounds characterised by the <SOI> and <EOI>
markers. Use the gst_jpeg_parse() codec parser utility function to
optimize the lookup for the next marker segment.
https://bugzilla.gnome.org/show_bug.cgi?id=707447
Fix calculation of the offset to the next marker segment since the
correction of the codecparser part to match the API specification.
i.e. the GstJpegMarkerSegment.size field represents the size in bytes
of the segment minus any marker prefix.
https://bugzilla.gnome.org/show_bug.cgi?id=707447
Signed-off-by: Junfeng Xu <jun.feng.xu@intel.com>
Fix detection of VA/JPEG decoding API with non-standard libva packages.
More precisely, some packages were shipping with a <va/va.h> header that
did not include <va/va_dec_jpeg.h>.
https://bugzilla.gnome.org/show_bug.cgi?id=706055
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Port GstVaapiDecoder and GstVaapiDecoder{MPEG2,MPEG4,JPEG,H264,VC1} to
GstVaapiMiniObject. Add gst_vaapi_decoder_set_codec_state_changed_func()
helper function to let the user add a callback to a function triggered
whenever the codec state (e.g. caps) changes.
This integrates support for GStreamer API >= 1.0 only in the libgstvaapi
core decoding library. The changes are kept rather minimal here so that
the library retains as little dependency as possible on core GStreamer
functionality.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Drop GstVaapiDecoderUnit buffer field (GstBuffer) since it's totally
useless nowadays as creating sub-buffers doesn't bring any value. It
actually means more memory allocations. We can't do without that in
JPEG and MPEG-4:2 decoders.
Allocate decoder unit earlier in the main parse() function and don't
delegate this task to derived classes. The ultimate purpose is to get
rid of dynamic allocation of decoder units.
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>
Add valid flag to GstJpegQuantTable and GstJpegHuffmanTable so that
to determine whether a table actually changed since the last user
synchronization point. That way, this makes it possible for some
hardware accelerated decoding solution to upload only those tables
that changed.
Add new GstJpegHuffmanTables helper structure to hold all possible
AC/DC Huffman tables available to all components.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
gst_jpeg_parse() now gathers all scans available in the supplied
buffer. A scan comprises of the scan header and any entropy-coded
segments or restart marker following it. The size and offset to
the associated data (ECS + RST segments) are append to a new
GstJpegScanOffsetSize structure.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
