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surface: add support for dma_buf imports.

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Add new gst_vaapi_surface_new_with_dma_buf_handle() helper function
to allow for creating VA surfaces from a foreign DRM PRIME fd. The
resulting VA surface owns the supplied buffer handle.

https://bugzilla.gnome.org/show_bug.cgi?id=735362
This commit is contained in:
Gwenole Beauchesne 2014-09-15 15:25:09 +02:00
parent dd37fc4999
commit 011f9bd6cb
2 changed files with 58 additions and 0 deletions
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53
gst-libs/gst/vaapi/gstvaapisurface_drm.c
View file

@ -97,3 +97,56 @@ gst_vaapi_surface_get_gem_buf_handle (GstVaapiSurface * surface)
return gst_vaapi_surface_get_drm_buf_handle (surface,
GST_VAAPI_BUFFER_MEMORY_TYPE_GEM_BUF);
}
static void
fill_video_info (GstVideoInfo * vip, GstVideoFormat format, guint width,
guint height, gsize offset[GST_VIDEO_MAX_PLANES],
gint stride[GST_VIDEO_MAX_PLANES])
{
guint i;
gst_video_info_init (vip);
gst_video_info_set_format (vip, format, width, height);
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (vip); i++) {
GST_VIDEO_INFO_PLANE_OFFSET (vip, i) = offset[i];
GST_VIDEO_INFO_PLANE_STRIDE (vip, i) = stride[i];
}
}
/**
* gst_vaapi_surface_new_with_dma_buf_handle:
* @display: a #GstVaapiDisplay
* @fd: the DRM PRIME file descriptor
* @size: the underlying DRM buffer size
* @format: the desired surface format
* @width: the desired surface width in pixels
* @height: the desired surface height in pixels
* @offset: the offsets to each plane
* @stride: the pitches for each plane
*
* Creates a new #GstVaapiSurface with an external DRM PRIME file
* descriptor. The newly created VA surfaces owns the supplied buffer
* handle.
*
* Return value: the newly allocated #GstVaapiSurface object, or %NULL
* if creation from DRM PRIME fd failed, or is not supported
*/
GstVaapiSurface *
gst_vaapi_surface_new_with_dma_buf_handle (GstVaapiDisplay * display,
gint fd, guint size, GstVideoFormat format, guint width, guint height,
gsize offset[GST_VIDEO_MAX_PLANES], gint stride[GST_VIDEO_MAX_PLANES])
{
GstVaapiBufferProxy *proxy;
GstVaapiSurface *surface;
GstVideoInfo vi;
proxy = gst_vaapi_buffer_proxy_new ((gintptr) fd,
GST_VAAPI_BUFFER_MEMORY_TYPE_DMA_BUF, size, NULL, NULL);
if (!proxy)
return NULL;
fill_video_info (&vi, format, width, height, offset, stride);
surface = gst_vaapi_surface_new_from_buffer_proxy (display, proxy, &vi);
gst_vaapi_buffer_proxy_unref (proxy);
return surface;
}

5
gst-libs/gst/vaapi/gstvaapisurface_drm.h
View file

@ -34,6 +34,11 @@ gst_vaapi_surface_get_dma_buf_handle (GstVaapiSurface * surface);
GstVaapiBufferProxy *
gst_vaapi_surface_get_gem_buf_handle (GstVaapiSurface * surface);
GstVaapiSurface *
gst_vaapi_surface_new_with_dma_buf_handle (GstVaapiDisplay * display,
gint fd, guint size, GstVideoFormat format, guint width, guint height,
gsize offset[GST_VIDEO_MAX_PLANES], gint stride[GST_VIDEO_MAX_PLANES]);
G_END_DECLS
#endif /* GST_VAAPI_SURFACE_DRM_H */