gstreamer/gst-libs/gst/vaapi/gstvaapisurface_drm.c
2016-12-14 17:25:44 +01:00

191 lines
6.1 KiB
C

/*
* gstvaapisurface_drm.c - VA surface abstraction (DRM interop)
*
* Copyright (C) 2014 Intel Corporation
* Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "sysdeps.h"
#include "gstvaapisurface_drm.h"
#include "gstvaapisurface_priv.h"
#include "gstvaapiimage_priv.h"
#include "gstvaapibufferproxy_priv.h"
static GstVaapiBufferProxy *
gst_vaapi_surface_get_drm_buf_handle (GstVaapiSurface * surface, guint type)
{
GstVaapiBufferProxy *proxy;
GstVaapiImage *image;
image = gst_vaapi_surface_derive_image (surface);
if (!image)
goto error_derive_image;
proxy =
gst_vaapi_buffer_proxy_new_from_object (GST_VAAPI_OBJECT (surface),
image->internal_image.buf, type, gst_vaapi_object_unref, image);
if (!proxy)
goto error_alloc_export_buffer;
return proxy;
/* ERRORS */
error_derive_image:
{
GST_ERROR ("failed to extract image handle from surface");
return NULL;
}
error_alloc_export_buffer:
{
GST_ERROR ("failed to allocate export buffer proxy");
gst_vaapi_object_unref (image);
return NULL;
}
}
/**
* gst_vaapi_surface_get_dma_buf_handle:
* @surface: a #GstVaapiSurface
*
* If the underlying VA driver implementation supports it, this
* function allows for returning a suitable dma_buf (DRM) buffer
* handle as a #GstVaapiBufferProxy instance. The resulting buffer
* handle is live until the last reference to the proxy gets
* released. Besides, any further change to the parent VA @surface may
* fail.
*
* Return value: the underlying buffer as a #GstVaapiBufferProxy
* instance.
*/
GstVaapiBufferProxy *
gst_vaapi_surface_get_dma_buf_handle (GstVaapiSurface * surface)
{
g_return_val_if_fail (surface != NULL, NULL);
return gst_vaapi_surface_get_drm_buf_handle (surface,
GST_VAAPI_BUFFER_MEMORY_TYPE_DMA_BUF);
}
/**
* gst_vaapi_surface_get_gem_buf_handle:
* @surface: a #GstVaapiSurface
*
* If the underlying VA driver implementation supports it, this
* function allows for returning a suitable GEM buffer handle as a
* #GstVaapiBufferProxy instance. The resulting buffer handle is live
* until the last reference to the proxy gets released. Besides, any
* further change to the parent VA @surface may fail.
*
* Return value: the underlying buffer as a #GstVaapiBufferProxy
* instance.
*/
GstVaapiBufferProxy *
gst_vaapi_surface_get_gem_buf_handle (GstVaapiSurface * surface)
{
g_return_val_if_fail (surface != NULL, NULL);
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_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,
GstVideoInfo * vi)
{
GstVaapiBufferProxy *proxy;
GstVaapiSurface *surface;
proxy = gst_vaapi_buffer_proxy_new ((gintptr) fd,
GST_VAAPI_BUFFER_MEMORY_TYPE_DMA_BUF, GST_VIDEO_INFO_SIZE (vi), NULL,
NULL);
if (!proxy)
return NULL;
surface = gst_vaapi_surface_new_from_buffer_proxy (display, proxy, vi);
gst_vaapi_buffer_proxy_unref (proxy);
return surface;
}
/**
* gst_vaapi_surface_new_with_gem_buf_handle:
* @display: a #GstVaapiDisplay
* @name: the DRM GEM buffer name
* @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 GEM buffer
* name. The newly created VA surfaces owns the supplied buffer
* handle.
*
* Return value: the newly allocated #GstVaapiSurface object, or %NULL
* if creation from GEM @name failed, or is not supported
*/
GstVaapiSurface *
gst_vaapi_surface_new_with_gem_buf_handle (GstVaapiDisplay * display,
guint32 name, 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 ((guintptr) name,
GST_VAAPI_BUFFER_MEMORY_TYPE_GEM_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;
}