[Libva] bitrate woes....

[Tony Di Croce]

I'm having a very hard time getting libva to honor my bitrate settings, and
it appears that the test program at

http://cgit.freedesktop.org/libva/tree/test/encode/h264encode.c

also isn't working. The only modification I made to h264encode.c was
getting it to get it's VADisplay from the drm device (vaGetDisplayDRM(fd)).

I am using the built in image as the YUV source in my testing. Here is how
I am running it:

sudo ./h264encode -n 300 --bitrate 500000 -rcmode VBR

For all of the rate control modes (except for CBR) I see an error like the
following:

Support rate control mode (0x12):CBR CQP
Warning: Don't support the specified RateControl mode: VBR!!!, switch to
RateControl mode: CQP

And the file is always the same size (regardless of the bitrate I pass in).

If I use CBR the output is slightly different:

Support rate control mode (0x12):CBR CQP

Similar to the above, except it doesn't have the Warning. The other problem
is that the file created has 0 length.

If I use CQP as the rate control mode I get no warnings, but the file is
always the same size regardless of the bitrate I pass in.

Here is the output from vainfo on my machine:

[td at localhost enc]$ vainfo
libva info: VA-API version 0.36.0
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_36
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.36 (libva 1.4.0)
vainfo: Driver version: Intel i965 driver for Intel(R) Sandybridge Mobile -
1.4.0
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            : VAEntrypointVLD
      VAProfileMPEG2Main              : VAEntrypointVLD
      VAProfileH264ConstrainedBaseline: VAEntrypointVLD
      VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
      VAProfileH264Main               : VAEntrypointVLD
      VAProfileH264Main               : VAEntrypointEncSlice
      VAProfileH264High               : VAEntrypointVLD
      VAProfileH264High               : VAEntrypointEncSlice
      VAProfileH264StereoHigh         : VAEntrypointVLD
      VAProfileVC1Simple              : VAEntrypointVLD
      VAProfileVC1Main                : VAEntrypointVLD
      VAProfileVC1Advanced            : VAEntrypointVLD
      VAProfileNone                   : VAEntrypointVideoProc

Does libva actually support the bitrate setting?
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