<div dir="ltr">Shengquan,<div> </div><div>Thanks for the sample code. I have some follow-up questions:</div><div> </div><div>1. Can I use VA_RT_FORMAT_RGB32 as the pixel format for vaCreateSurfaces? It'll be simpler since normally the 2D texture is in ARGB format.</div><div>2. Do I have to align the picture width and height, i.e., can I just use 1920x1080 for a full HD picture?</div><div> </div><div>Best</div><div>Christine</div></div><div class="gmail_extra"> <div class="gmail_quote">On Wed, May 25, 2016 at 3:46 AM, Yuan, Shengquan <<a href="mailto:shengquan.yuan@intel.com" target="_blank">shengquan.yuan@intel.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div lang="EN-US" link="#0563C1" vlink="#954F72"> <div> For vaCreateContext, I think render_targets/num_render_targets are optional (it depends on driver implementation), and the surface of vaBeginPicture can a brand-new surface VAStatus vaCreateContext ( VADisplay dpy, VAConfigID config_id, int picture_width, int picture_height, int flag, VASurfaceID *render_targets, int num_render_targets, VAContextID *context /* out */ ); DMA buffer can be imported through VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME, e.g. VASurfaceAttribExternalBuffers buf; VASurfaceAttribType type, VASurfaceAttrib attrib_list[2] unsigned long prime_fd; /* an input variable, it is the imported prime fd from other process */ int stride = frame_width_aligned, height_aligned = frame_height_aligned; if (stride == 0) stride = frame_width_mbaligned; if (height_aligned == 0) height_aligned = frame_height_mbaligned; buf.pixel_format = VA_FOURCC_NV12; buf.width = frame_width_mbaligned; buf.height = frame_height_mbaligned; buf.data_size = stride * height_aligned * 1.5; buf.num_buffers = 1; /* import only 1 buffer */ buf.num_planes = 3; buf.pitches[0] = stride; buf.pitches[1] = stride; buf.pitches[2] = stride; buf.pitches[3] = 0; buf.offsets[0] = 0; buf.offsets[1] = stride * height_aligned; buf.offsets[2] = buf.offsets[1]; buf.offsets[3] = 0; buf.buffers = &prime_fd; buf.flags = 0; buf.private_data = NULL; attrib_list[0].type = (VASurfaceAttribType)VASurfaceAttribMemoryType; attrib_list[0].flags = VA_SURFACE_ATTRIB_SETTABLE; attrib_list[0].value.type = VAGenericValueTypeInteger; attrib_list[0].value.value.i = VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME attrib_list[1].type = (VASurfaceAttribType)VASurfaceAttribExternalBufferDescriptor; attrib_list[1].flags = VA_SURFACE_ATTRIB_SETTABLE; attrib_list[1].value.type = VAGenericValueTypePointer; attrib_list[1].value.value.p = (void *)buf; vaCreateSurfaces( va_dpy, VA_RT_FORMAT_YUV420, frame_width_mbaligned, frame_height_mbaligned, &surface_id, 1, &attrib_list, 2); <a name="m_-3275825310711099550__MailEndCompose"> </a> <a name="m_-3275825310711099550______replyseparator"></a>From: Libva [mailto:<a href="mailto:libva-bounces@lists.freedesktop.org" target="_blank">libva-bounces@lists.freedesktop.org</a>] On Behalf Of Anon Sent: Wednesday, May 25, 2016 2:23 PM To: <a href="mailto:libva@lists.freedesktop.org" target="_blank">libva@lists.freedesktop.org</a> Subject: [Libva] encode surfaces created from prime fd (backed by OpenGL 2D texture)<div><div class="h5"> <div> Hi All, <div> </div> <div> I want to implement the following use case on Intel Haswell CPU with HD graphics: </div> <div> </div> <div> offscreen OpenGL rendering to OpenGL 2D texture -> use EGL_MESA_image_dma_buf_export to export the texture as prime fd -> vaCreateSurfaces from the prime fd -> use vaapi to hw acclerate h264 encoding </div> <div> </div> <div> Is this supported by the latest va-api and libva-intel-driver release (i.e., 1.7.0)? If so, is there any example I can start with? </div> <div> </div> <div> I did read the sample application h264encode.c and thought it might be a good starting point. However, the first major issue I encountered is when creating context through vaCreateContext, a number of pre-allocated va surfaces are required and thus statically associated with the new va context. However, with prime fd, the fd will change so a new va surface is created with every new prime fd. I don't see any API can be used to dynamically add/remove va surfaces after the context is created. Can you please give me some suggestions? </div> <div> </div> <div> Best, </div> <div> Kristine </div> </div> </div></div></div> </div> </blockquote></div> </div>