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msdk: Add method to export dmabuf to VASurface

Browse source 
Exporting DRM_PRIME fd to VASurface requires direct
invocation of VA api VACreateSurface with
VASurfaceAttribExternalBufferDescriptor and other
necessary surface attributes.

https://bugzilla.gnome.org/show_bug.cgi?id=794817
This commit is contained in:
Sreerenj Balachandran 2018-05-30 16:22:49 -08:00
parent 33c7af8845
commit 62d2d8ebf9
2 changed files with 95 additions and 0 deletions
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91
sys/msdk/gstmsdkallocator_libva.c
View file

@ -374,3 +374,94 @@ gst_msdk_get_dmabuf_info_from_surface (mfxFrameSurface1 * surface,
return TRUE;
}
gboolean
gst_msdk_export_dmabuf_to_vasurface (GstMsdkContext * context,
GstVideoInfo * vinfo, gint fd, VASurfaceID * surface_id)
{
GstVideoFormat format;
guint width, height, size, i;
unsigned long extbuf_handle;
guint va_fourcc = 0, va_chroma = 0;
VASurfaceAttrib attribs[2], *attrib;
VASurfaceAttribExternalBuffers extbuf;
VAStatus va_status;
mfxStatus status = MFX_ERR_NONE;
g_return_val_if_fail (context != NULL, FALSE);
g_return_val_if_fail (vinfo != NULL, FALSE);
g_return_val_if_fail (fd >= 0, FALSE);
extbuf_handle = (guintptr) (fd);
format = GST_VIDEO_INFO_FORMAT (vinfo);
width = GST_VIDEO_INFO_WIDTH (vinfo);
height = GST_VIDEO_INFO_HEIGHT (vinfo);
size = GST_VIDEO_INFO_SIZE (vinfo);
/* Fixme: Move to common format handling util */
switch (format) {
case GST_VIDEO_FORMAT_NV12:
va_chroma = VA_RT_FORMAT_YUV420;
va_fourcc = VA_FOURCC_NV12;
break;
case GST_VIDEO_FORMAT_BGRA:
va_chroma = VA_RT_FORMAT_YUV444;
va_fourcc = VA_FOURCC_BGRA;
break;
case GST_VIDEO_FORMAT_YUY2:
va_chroma = VA_RT_FORMAT_YUV422;
va_fourcc = VA_FOURCC_YUY2;
break;
default:
goto error_unsupported_format;
}
/* Fill the VASurfaceAttribExternalBuffers */
extbuf.pixel_format = va_fourcc;
extbuf.width = width;
extbuf.height = height;
extbuf.data_size = size;
extbuf.num_planes = GST_VIDEO_INFO_N_PLANES (vinfo);
for (i = 0; i < extbuf.num_planes; i++) {
extbuf.pitches[i] = GST_VIDEO_INFO_PLANE_STRIDE (vinfo, i);
extbuf.offsets[i] = GST_VIDEO_INFO_PLANE_OFFSET (vinfo, i);
}
extbuf.buffers = (uintptr_t *) & extbuf_handle;
extbuf.num_buffers = 1;
extbuf.flags = 0;
extbuf.private_data = NULL;
/* Fill the Surface Attributes */
attrib = attribs;
attrib->type = VASurfaceAttribMemoryType;
attrib->flags = VA_SURFACE_ATTRIB_SETTABLE;
attrib->value.type = VAGenericValueTypeInteger;
attrib->value.value.i = VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME;
attrib++;
attrib->type = VASurfaceAttribExternalBufferDescriptor;
attrib->flags = VA_SURFACE_ATTRIB_SETTABLE;
attrib->value.type = VAGenericValueTypePointer;
attrib->value.value.p = &extbuf;
attrib++;
va_status = vaCreateSurfaces (gst_msdk_context_get_handle (context),
va_chroma, width, height, surface_id, 1, attribs, attrib - attribs);
status = gst_msdk_get_mfx_status_from_va_status (va_status);
if (status != MFX_ERR_NONE)
goto error_create_surface;
return TRUE;
error_unsupported_format:
{
GST_ERROR ("Unsupported Video format %s, Can't export dmabuf to vaSurface",
gst_video_format_to_string (format));
return FALSE;
}
error_create_surface:
{
GST_ERROR ("Failed to create the VASurface from DRM_PRIME FD");
return FALSE;
}
}

4
sys/msdk/gstmsdkallocator_libva.h
View file

@ -41,6 +41,10 @@ G_BEGIN_DECLS
gboolean
gst_msdk_get_dmabuf_info_from_surface (mfxFrameSurface1 * surface, gint *handle, gsize *size);
gboolean
gst_msdk_export_dmabuf_to_vasurface (GstMsdkContext *context,
GstVideoInfo *vinfo, gint fd, VASurfaceID *surface_id);
G_END_DECLS
#endif /* GST_MSDK_ALLOCATOR_LIBVA_H_ */