gstreamer/gst-libs/gst/gl/egl/gsteglimage.h
Matt Fischer c98f92ee03 gldownload: Add dmabuf exporting
This patch adds code to gldownload to export the image as a
dmabuf if requested.  The element now exposes memory:DMABuf as
a cap feature, and if it is selected, the element exports the
texture to an EGL image and then a dmabuf. It also implements a
fallback to system memory download in case the exportation failed.

https://bugzilla.gnome.org/show_bug.cgi?id=776927
2017-12-09 19:32:31 +00:00

124 lines
4.1 KiB
C

/*
* GStreamer
* Copyright (C) 2012 Collabora Ltd.
* @author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
* Copyright (C) 2014 Julien Isorce <julien.isorce@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _GST_EGL_IMAGE_H_
#define _GST_EGL_IMAGE_H_
#include <gst/gl/gstgl_fwd.h>
#include <gst/gl/gstglformat.h>
G_BEGIN_DECLS
GST_EXPORT GType gst_egl_image_get_type (void);
#define GST_TYPE_EGL_IMAGE (gst_egl_image_get_type())
#define GST_IS_EGL_IMAGE(obj) (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_EGL_IMAGE))
#define GST_EGL_IMAGE_CAST(obj) ((GstEGLImage *)(obj))
#define GST_EGL_IMAGE(obj) (GST_EGL_IMAGE_CAST(obj))
typedef struct _GstEGLImage GstEGLImage;
/**
* GstEGLImageDestroyNotify:
* @image: a #GstEGLImage
* @data: user data passed to gst_egl_image_new_wrapped()
*
* Function to be called when the GstEGLImage is destroyed. It should free
* the associated #EGLImage if necessary
*/
typedef void (*GstEGLImageDestroyNotify) (GstEGLImage * image,
gpointer data);
/**
* GstEGLImage:
*
* Opaque #GstEGLImage struct.
*/
struct _GstEGLImage
{
GstMiniObject parent;
GstGLContext *context;
gpointer image;
GstGLFormat format;
/* <private> */
gpointer destroy_data;
GstEGLImageDestroyNotify destroy_notify;
gpointer _padding[GST_PADDING];
};
GST_EXPORT
GstEGLImage * gst_egl_image_new_wrapped (GstGLContext * context,
gpointer image,
GstGLFormat format,
gpointer user_data,
GstEGLImageDestroyNotify user_data_destroy);
GST_EXPORT
gpointer gst_egl_image_get_image (GstEGLImage * image);
GST_EXPORT
GstEGLImage * gst_egl_image_from_texture (GstGLContext * context,
GstGLMemory * gl_mem,
guintptr * attribs);
#if GST_GL_HAVE_DMABUF
GST_EXPORT
GstEGLImage * gst_egl_image_from_dmabuf (GstGLContext * context,
gint dmabuf,
GstVideoInfo * in_info,
gint plane,
gsize offset);
GST_EXPORT
gboolean gst_egl_image_export_dmabuf (GstEGLImage *image, int *fd, gint *stride, gsize *offset);
#endif
/**
* gst_egl_image_ref:
* @image: a #GstEGLImage.
*
* Increases the refcount of the given image by one.
*
* Returns: (transfer full): @image
*/
static inline GstEGLImage *
gst_egl_image_ref (GstEGLImage * image)
{
return (GstEGLImage *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (image));
}
/**
* gst_egl_image_unref:
* @image: (transfer full): a #GstEGLImage.
*
* Decreases the refcount of the image. If the refcount reaches 0, the image
* with the associated metadata and memory will be freed.
*/
static inline void
gst_egl_image_unref (GstEGLImage * image)
{
gst_mini_object_unref (GST_MINI_OBJECT_CAST (image));
}
G_END_DECLS
#endif /* _GST_EGL_IMAGE_H_ */