[Bug 734003] New: videocovert poor performance on I420 to BGR

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=734003
  GStreamer | gst-plugins-base | 1.4.0

           Summary: videocovert poor performance on I420 to BGR
    Classification: Platform
           Product: GStreamer
           Version: 1.4.0
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: jake.foytik at ipconfigure.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


On Windows and Linux, I am seeing poor performance for converting video from
I420 to BGR. This seems to be related to Bug 721701 (
https://bugzilla.gnome.org/show_bug.cgi?id=721701 ). I have verified that Orc
is enabled, but there does not seem to be a fast path for I420->BGR. Is this
correct?

The following pipelines were tested on linux x86_64 with Orc enabled:
gst-launch-1.0 videotestsrc ! video/x-raw,format=I420,width=1280,height=1024 !
videoconvert ! video/x-raw,format=BGRA ! fakesink sync=true
CPU 4%

gst-launch-1.0 videotestsrc ! video/x-raw,format=I420,width=1280,height=1024 !
videoconvert ! video/x-raw,format=BGR ! fakesink sync=true
CPU 8%


Also, when testing conversion of I420->BGRA, I see fast performance with
gstreamer x86_64. However, gstreamer x86 performs much slower and posts the
warning:
' ORC: WARNING: orccompiler.c(382): orc_program_compile_full(): program
video_convert_orc_convert_I420_BGRA failed to compile, reason: register
overflow for vector reg '
Is it possible to get the Orc optimization on the 32 bit build?

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