[Libva] VAAPI encoding with Intel Sandybridge GPU

[Ratin]

Hi Haihao, Thanks a lot for your quick reply!

On Thu, Aug 9, 2012 at 10:41 PM, Xiang, Haihao <haihao.xiang at intel.com> wrote:
>
>> Hi,
>>
>> I am trying to use libva with Intel driver back-end for decode and
>> encode. Decoding works like charm, but when I try to encode, I get
>> some problems.
>
> Which branch are you using, staging or master ? Encoder on staging has
> more features.

I was using an older version libva-1.0.15 and  intel-driver-1.0.17. I
tried to compile the latest versions (master branch?) from git repos
git://anongit.freedesktop.org/git/libva and
git://anongit.freedesktop.org/vaapi/intel-driver and  but met with
some compile errorrs in intel-driver:

CC     i965_drv_video_la-gen6_mfc.lo
gen6_mfc.c: In function 'gen6_mfc_avc_pipeline_programing':
gen6_mfc.c:763:5: error: unknown type name 'VAEncSequenceParameterBufferH264'
gen6_mfc.c:763:61: error: 'VAEncSequenceParameterBufferH264'
undeclared (first use in this function)
gen6_mfc.c:763:61: note: each undeclared identifier is reported only
once for each function it appears in
gen6_mfc.c:763:95: error: expected expression before ')' token
gen6_mfc.c:782:40: error: request for member 'initial_qp' in something
not a structure or union
gen6_mfc.c: In function 'gen6_mfc_avc_prepare':
gen6_mfc.c:848:5: error: unknown type name 'VAEncPictureParameterBufferH264'
gen6_mfc.c:848:55: error: 'VAEncPictureParameterBufferH264' undeclared
(first use in this function)
gen6_mfc.c:848:88: error: expected expression before ')' token
gen6_mfc.c:852:19: error: request for member 'reconstructed_picture'
in something not a structure or union
gen6_mfc.c:863:19: error: request for member 'reference_picture' in
something not a structure or union
gen6_mfc.c:875:18: error: request for member 'coded_buf' in something
not a structure or union
gen6_mfc.c: At top level:
gen6_mfc.c:388:13: warning: 'gen6_mfc_avc_directmode_state' defined
but not used [-Wunused-function]
gen6_mfc.c:599:1: warning: 'gen6_mfc_avc_insert_object' defined but
not used [-Wunused-function]
make[3]: *** [i965_drv_video_la-gen6_mfc.lo] Error 1

VAEncPictureParameterBufferH264 is declared in va.h but even if I
explicitly add the include file, it still cant find the struct.



>> I got the same errors using the sample code provided by Intel for encoding ,
>> I get the error :
>>
>> video: 720x480; fourcc:0x56595559
>> negotiated frame resolution: 640x480
>> libva: VA-API version 0.32.0
>> libva: va_getDriverName() returns 0
>> libva: Trying to open /usr/local/lib/dri/i965_drv_video.so
>> libva: va_openDriver() returns 0
>> encode frame:0
>> h264enc: i965_drv_video.c:1408: i965_EndPicture: Assertion
>> `obj_context->codec_state.encode.seq_param' failed.
>> Aborted
>
> Try with avcenc in test/encode
>

For now , I am just focusing on any successful encoding , so I
recompiled the older version of Intel  driver version and went ahead
to encode an yuv video file using avcenc. After some fixing here and
there (mostly  rate_control_method defaulting to 16 which the older
driver does not support ) I am stuck at a point where its trying to
create the buffer inside begin_picture function:

 va_status = vaCreateBuffer(va_dpy,
                                   avcenc_context.context_id,
                                   VAEncPackedHeaderParameterBufferType,
                                   sizeof(packed_header_param_buffer),
1, &packed_header_param_buffer,

&avcenc_context.packed_seq_header_param_buf_id);
        CHECK_VASTATUS(va_status,"vaCreateBuffer");

(gdb) p va_status
$6 = 15
(gdb) n
begin_picture:vaCreateBuffer (467) failed,exit
[Inferior 1 (process 15135) exited with code 01]
warning: Error removing breakpoint 0
warning: Error removing breakpoint 0
warning: Error removing breakpoint 0
warning: Error removing breakpoint 0
warning: Error removing breakpoint 0

so I think I need to successfully compile the latest intel-driver. Is
git://anongit.freedesktop.org/git/libva and
git://anongit.freedesktop.org/vaapi/intel-driver the right repository
to use?

Thanks and regards,

Ratin