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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
531 lines
15 KiB
C
531 lines
15 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Collabora Ltd.
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* @author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* Copyright (C) 2014 Julien Isorce <julien.isorce@gmail.com>
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* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gsteglimage
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* @short_description: EGLImage abstraction
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* @title: GstEGLImage
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* @see_also: #GstGLMemoryEGL, #GstGLContext
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*
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* #GstEGLImage represents and holds an #EGLImage handle.
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*
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* A #GstEGLImage can be created from a dmabuf with gst_egl_image_from_dmabuf()
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* or #GstGLMemoryEGL provides a #GstAllocator to allocate #EGLImage's bound to
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* and OpenGL texture.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gsteglimage.h"
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#include <string.h>
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#include <gst/gl/gstglfeature.h>
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#include <gst/gl/gstglmemory.h>
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#include "gst/gl/egl/gstegl.h"
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#include "gst/gl/egl/gstglcontext_egl.h"
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#include "gst/gl/egl/gstgldisplay_egl.h"
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#if GST_GL_HAVE_DMABUF
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#include <gst/allocators/gstdmabuf.h>
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#include <libdrm/drm_fourcc.h>
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#ifndef DRM_FORMAT_R8
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#define DRM_FORMAT_R8 fourcc_code('R', '8', ' ', ' ')
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#endif
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#ifndef DRM_FORMAT_RG88
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#define DRM_FORMAT_RG88 fourcc_code('R', 'G', '8', '8')
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#endif
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#ifndef DRM_FORMAT_GR88
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#define DRM_FORMAT_GR88 fourcc_code('G', 'R', '8', '8')
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#endif
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#endif
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#ifndef EGL_LINUX_DMA_BUF_EXT
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#define EGL_LINUX_DMA_BUF_EXT 0x3270
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#endif
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#ifndef EGL_LINUX_DRM_FOURCC_EXT
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#define EGL_LINUX_DRM_FOURCC_EXT 0x3271
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#endif
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#ifndef EGL_DMA_BUF_PLANE0_FD_EXT
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#define EGL_DMA_BUF_PLANE0_FD_EXT 0x3272
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#endif
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#ifndef EGL_DMA_BUF_PLANE0_OFFSET_EXT
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#define EGL_DMA_BUF_PLANE0_OFFSET_EXT 0x3273
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#endif
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#ifndef EGL_DMA_BUF_PLANE0_PITCH_EXT
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#define EGL_DMA_BUF_PLANE0_PITCH_EXT 0x3274
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#endif
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GST_DEFINE_MINI_OBJECT_TYPE (GstEGLImage, gst_egl_image);
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#ifndef GST_DISABLE_GST_DEBUG
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#define GST_CAT_DEFAULT gst_egl_image_ensure_debug_category()
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static GstDebugCategory *
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gst_egl_image_ensure_debug_category (void)
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{
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static gsize cat_gonce = 0;
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if (g_once_init_enter (&cat_gonce)) {
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GstDebugCategory *cat = NULL;
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GST_DEBUG_CATEGORY_INIT (cat, "gleglimage", 0, "EGLImage wrapper");
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g_once_init_leave (&cat_gonce, (gsize) cat);
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}
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return (GstDebugCategory *) cat_gonce;
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}
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#endif /* GST_DISABLE_GST_DEBUG */
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/**
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* gst_egl_image_get_image:
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* @image: a #GstEGLImage
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*
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* Returns: the #EGLImageKHR of @image
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*/
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gpointer
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gst_egl_image_get_image (GstEGLImage * image)
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{
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g_return_val_if_fail (GST_IS_EGL_IMAGE (image), EGL_NO_IMAGE_KHR);
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return image->image;
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}
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static void
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_gst_egl_image_free_thread (GstGLContext * context, GstEGLImage * image)
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{
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if (image->destroy_notify)
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image->destroy_notify (image, image->destroy_data);
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}
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static void
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_gst_egl_image_free (GstMiniObject * object)
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{
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GstEGLImage *image = GST_EGL_IMAGE (object);
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if (image->context) {
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gst_gl_context_thread_add (GST_GL_CONTEXT (image->context),
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(GstGLContextThreadFunc) _gst_egl_image_free_thread, image);
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gst_object_unref (image->context);
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}
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}
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static GstMiniObject *
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_gst_egl_image_copy (GstMiniObject * obj)
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{
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return gst_mini_object_ref (obj);
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}
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/**
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* gst_egl_image_new_wrapped:
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* @context: a #GstGLContext (must be an EGL context)
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* @image: the image to wrap
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* @format: the #GstGLFormat
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* @user_data: user data
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* @user_data_destroy: called when @user_data is no longer needed
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*
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* Returns: a new #GstEGLImage wrapping @image
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*/
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GstEGLImage *
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gst_egl_image_new_wrapped (GstGLContext * context, gpointer image,
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GstGLFormat format, gpointer user_data,
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GstEGLImageDestroyNotify user_data_destroy)
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{
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GstEGLImage *img = NULL;
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g_return_val_if_fail (context != NULL, NULL);
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g_return_val_if_fail ((gst_gl_context_get_gl_platform (context) &
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GST_GL_PLATFORM_EGL) != 0, NULL);
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g_return_val_if_fail (image != EGL_NO_IMAGE_KHR, NULL);
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img = g_new0 (GstEGLImage, 1);
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gst_mini_object_init (GST_MINI_OBJECT_CAST (img), 0, GST_TYPE_EGL_IMAGE,
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(GstMiniObjectCopyFunction) _gst_egl_image_copy, NULL,
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(GstMiniObjectFreeFunction) _gst_egl_image_free);
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img->context = gst_object_ref (context);
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img->image = image;
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img->format = format;
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img->destroy_data = user_data;
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img->destroy_notify = user_data_destroy;
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return img;
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}
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static EGLImageKHR
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_gst_egl_image_create (GstGLContext * context, guint target,
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EGLClientBuffer buffer, guintptr * attribs)
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{
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EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
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EGLContext egl_context = EGL_NO_CONTEXT;
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EGLImageKHR img = EGL_NO_IMAGE_KHR;
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GstGLDisplayEGL *display_egl;
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gint plat_major, plat_minor;
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guint attrib_len = 0;
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gst_gl_context_get_gl_platform_version (context, &plat_major, &plat_minor);
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display_egl = gst_gl_display_egl_from_gl_display (context->display);
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if (!display_egl) {
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GST_WARNING_OBJECT (context, "Failed to retrieve GstGLDisplayEGL from %"
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GST_PTR_FORMAT, context->display);
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return EGL_NO_IMAGE_KHR;
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}
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egl_display =
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(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
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gst_object_unref (display_egl);
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if (target != EGL_LINUX_DMA_BUF_EXT)
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egl_context = (EGLContext) gst_gl_context_get_gl_context (context);
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if (attribs)
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while (attribs[attrib_len++] != EGL_NONE) {
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}
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#ifdef EGL_VERSION_1_5
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if (GST_GL_CHECK_GL_VERSION (plat_major, plat_minor, 1, 5)) {
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EGLImageKHR (*gst_eglCreateImage) (EGLDisplay dpy, EGLContext ctx,
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EGLenum target, EGLClientBuffer buffer, const EGLAttrib * attrib_list);
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EGLAttrib *egl_attribs = NULL;
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guint i;
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gst_eglCreateImage = gst_gl_context_get_proc_address (context,
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"eglCreateImage");
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if (!gst_eglCreateImage) {
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GST_ERROR_OBJECT (context, "\"eglCreateImage\" not exposed by the "
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"implementation as required by EGL >= 1.5");
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return EGL_NO_IMAGE_KHR;
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}
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if (attribs) {
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egl_attribs = g_new0 (EGLAttrib, attrib_len);
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for (i = 0; i < attrib_len; i++)
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egl_attribs[i] = (EGLAttrib) attribs[i];
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}
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img = gst_eglCreateImage (egl_display, egl_context, target, buffer,
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egl_attribs);
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g_free (egl_attribs);
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} else
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#endif
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{
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EGLImageKHR (*gst_eglCreateImageKHR) (EGLDisplay dpy, EGLContext ctx,
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EGLenum target, EGLClientBuffer buffer, const EGLint * attrib_list);
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EGLint *egl_attribs = NULL;
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gint i;
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gst_eglCreateImageKHR = gst_gl_context_get_proc_address (context,
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"eglCreateImageKHR");
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if (!gst_eglCreateImageKHR) {
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GST_WARNING_OBJECT (context, "\"eglCreateImageKHR\" not exposed by the "
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"implementation");
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return EGL_NO_IMAGE_KHR;
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}
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if (attribs) {
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egl_attribs = g_new0 (EGLint, attrib_len);
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for (i = 0; i < attrib_len; i++)
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egl_attribs[i] = (EGLint) attribs[i];
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}
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img = gst_eglCreateImageKHR (egl_display, egl_context, target, buffer,
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egl_attribs);
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g_free (egl_attribs);
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}
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return img;
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}
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static void
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_gst_egl_image_destroy (GstGLContext * context, EGLImageKHR image)
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{
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EGLBoolean (*gst_eglDestroyImage) (EGLDisplay dpy, EGLImageKHR image);
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EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
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GstGLDisplayEGL *display_egl;
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gst_eglDestroyImage = gst_gl_context_get_proc_address (context,
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"eglDestroyImage");
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if (!gst_eglDestroyImage) {
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gst_eglDestroyImage = gst_gl_context_get_proc_address (context,
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"eglDestroyImageKHR");
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if (!gst_eglDestroyImage) {
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GST_ERROR_OBJECT (context, "\"eglDestroyImage\" not exposed by the "
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"implementation");
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return;
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}
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}
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display_egl = gst_gl_display_egl_from_gl_display (context->display);
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if (!display_egl) {
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GST_WARNING_OBJECT (context, "Failed to retrieve GstGLDisplayEGL from %"
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GST_PTR_FORMAT, context->display);
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return;
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}
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egl_display =
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(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
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gst_object_unref (display_egl);
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if (!gst_eglDestroyImage (egl_display, image))
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GST_WARNING_OBJECT (context, "eglDestroyImage failed");
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}
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static void
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_destroy_egl_image (GstEGLImage * image, gpointer user_data)
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{
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_gst_egl_image_destroy (image->context, image->image);
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}
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/**
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* gst_egl_image_from_texture:
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* @context: a #GstGLContext (must be an EGL context)
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* @gl_mem: a #GstGLMemory
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* @attribs: additional attributes to add to the eglCreateImage() call.
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*
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* Returns: (transfer full): a #GstEGLImage wrapping @gl_mem or %NULL on failure
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*/
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GstEGLImage *
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gst_egl_image_from_texture (GstGLContext * context, GstGLMemory * gl_mem,
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guintptr * attribs)
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{
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EGLenum egl_target;
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EGLImageKHR img;
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if (gl_mem->tex_target != GST_GL_TEXTURE_TARGET_2D) {
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GST_FIXME_OBJECT (context, "Only know how to create EGLImage's from 2D "
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"textures");
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return NULL;
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}
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egl_target = EGL_GL_TEXTURE_2D_KHR;
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img = _gst_egl_image_create (context, egl_target,
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(EGLClientBuffer) (guintptr) gl_mem->tex_id, attribs);
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if (!img)
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return NULL;
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return gst_egl_image_new_wrapped (context, img, gl_mem->tex_format, NULL,
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(GstEGLImageDestroyNotify) _destroy_egl_image);
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}
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#if GST_GL_HAVE_DMABUF
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/*
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* GStreamer format descriptions differ from DRM formats as the representation
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* is relative to a register, hence in native endianness. To reduce the driver
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* requirement, we only import with a subset of texture formats and use
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* shaders to convert. This way we avoid having to use external texture
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* target.
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*/
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static int
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_drm_fourcc_from_info (GstVideoInfo * info, int plane)
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{
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GstVideoFormat format = GST_VIDEO_INFO_FORMAT (info);
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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const gint rgba_fourcc = DRM_FORMAT_ABGR8888;
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const gint rgb_fourcc = DRM_FORMAT_BGR888;
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const gint rg_fourcc = DRM_FORMAT_GR88;
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#else
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const gint rgba_fourcc = DRM_FORMAT_RGBA8888;
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const gint rgb_fourcc = DRM_FORMAT_RGB888;
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const gint rg_fourcc = DRM_FORMAT_RG88;
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#endif
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GST_DEBUG ("Getting DRM fourcc for %s plane %i",
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gst_video_format_to_string (format), plane);
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switch (format) {
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case GST_VIDEO_FORMAT_RGB16:
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case GST_VIDEO_FORMAT_BGR16:
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return DRM_FORMAT_RGB565;
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case GST_VIDEO_FORMAT_RGB:
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case GST_VIDEO_FORMAT_BGR:
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return rgb_fourcc;
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case GST_VIDEO_FORMAT_RGBA:
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case GST_VIDEO_FORMAT_RGBx:
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case GST_VIDEO_FORMAT_BGRA:
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case GST_VIDEO_FORMAT_BGRx:
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case GST_VIDEO_FORMAT_ARGB:
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case GST_VIDEO_FORMAT_xRGB:
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case GST_VIDEO_FORMAT_ABGR:
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case GST_VIDEO_FORMAT_xBGR:
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case GST_VIDEO_FORMAT_AYUV:
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return rgba_fourcc;
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case GST_VIDEO_FORMAT_GRAY8:
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return DRM_FORMAT_R8;
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case GST_VIDEO_FORMAT_YUY2:
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case GST_VIDEO_FORMAT_UYVY:
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case GST_VIDEO_FORMAT_GRAY16_LE:
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case GST_VIDEO_FORMAT_GRAY16_BE:
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return rg_fourcc;
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case GST_VIDEO_FORMAT_NV12:
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case GST_VIDEO_FORMAT_NV21:
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return plane == 0 ? DRM_FORMAT_R8 : rg_fourcc;
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case GST_VIDEO_FORMAT_I420:
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case GST_VIDEO_FORMAT_YV12:
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case GST_VIDEO_FORMAT_Y41B:
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case GST_VIDEO_FORMAT_Y42B:
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case GST_VIDEO_FORMAT_Y444:
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return DRM_FORMAT_R8;
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default:
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GST_ERROR ("Unsupported format for DMABuf.");
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return -1;
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}
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}
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/**
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* gst_egl_image_from_dmabuf:
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* @context: a #GstGLContext (must be an EGL context)
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* @dmabuf: the DMA-Buf file descriptor
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* @in_info: the #GstVideoInfo in @dmabuf
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* @plane: the plane in @in_info to create and #GstEGLImage for
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* @offset: the byte-offset in the data
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*
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* Returns: a #GstEGLImage wrapping @dmabuf or %NULL on failure
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*/
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GstEGLImage *
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gst_egl_image_from_dmabuf (GstGLContext * context,
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gint dmabuf, GstVideoInfo * in_info, gint plane, gsize offset)
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{
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GstGLFormat format;
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guintptr attribs[13];
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EGLImageKHR img;
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gint atti = 0;
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gint fourcc;
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gint i;
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fourcc = _drm_fourcc_from_info (in_info, plane);
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format = gst_gl_format_from_video_info (context, in_info, plane);
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GST_DEBUG ("fourcc %.4s (%d) plane %d (%dx%d)",
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(char *) &fourcc, fourcc, plane,
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GST_VIDEO_INFO_COMP_WIDTH (in_info, plane),
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GST_VIDEO_INFO_COMP_HEIGHT (in_info, plane));
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attribs[atti++] = EGL_WIDTH;
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attribs[atti++] = GST_VIDEO_INFO_COMP_WIDTH (in_info, plane);
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attribs[atti++] = EGL_HEIGHT;
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attribs[atti++] = GST_VIDEO_INFO_COMP_HEIGHT (in_info, plane);
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attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
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attribs[atti++] = fourcc;
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attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
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attribs[atti++] = dmabuf;
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attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
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attribs[atti++] = offset;
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attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
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attribs[atti++] = GST_VIDEO_INFO_PLANE_STRIDE (in_info, plane);
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attribs[atti] = EGL_NONE;
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for (i = 0; i < atti; i++)
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GST_LOG ("attr %i: %" G_GINTPTR_FORMAT, i, attribs[i]);
|
|
|
|
g_assert (atti == 12);
|
|
|
|
img = _gst_egl_image_create (context, EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
|
|
if (!img) {
|
|
GST_WARNING ("eglCreateImage failed: %s",
|
|
gst_egl_get_error_string (eglGetError ()));
|
|
return NULL;
|
|
}
|
|
|
|
return gst_egl_image_new_wrapped (context, img, format, NULL,
|
|
(GstEGLImageDestroyNotify) _destroy_egl_image);
|
|
}
|
|
|
|
gboolean
|
|
gst_egl_image_export_dmabuf (GstEGLImage * image, int *fd, gint * stride,
|
|
gsize * offset)
|
|
{
|
|
EGLBoolean (*gst_eglExportDMABUFImageQueryMESA) (EGLDisplay dpy,
|
|
EGLImageKHR image, int *fourcc, int *num_planes,
|
|
EGLuint64KHR * modifiers);
|
|
EGLBoolean (*gst_eglExportDMABUFImageMESA) (EGLDisplay dpy, EGLImageKHR image,
|
|
int *fds, EGLint * strides, EGLint * offsets);
|
|
GstGLDisplayEGL *display_egl;
|
|
EGLDisplay egl_display = EGL_DEFAULT_DISPLAY;
|
|
int num_planes = 0;
|
|
int egl_fd = 0;
|
|
EGLint egl_stride = 0;
|
|
EGLint egl_offset = 0;
|
|
|
|
gst_eglExportDMABUFImageQueryMESA =
|
|
gst_gl_context_get_proc_address (image->context,
|
|
"eglExportDMABUFImageQueryMESA");
|
|
gst_eglExportDMABUFImageMESA =
|
|
gst_gl_context_get_proc_address (image->context,
|
|
"eglExportDMABUFImageMESA");
|
|
|
|
if (!gst_eglExportDMABUFImageQueryMESA || !gst_eglExportDMABUFImageMESA)
|
|
return FALSE;
|
|
|
|
display_egl =
|
|
(GstGLDisplayEGL *) gst_gl_display_egl_from_gl_display (image->
|
|
context->display);
|
|
if (!display_egl) {
|
|
GST_WARNING_OBJECT (image->context,
|
|
"Failed to retrieve GstGLDisplayEGL from %" GST_PTR_FORMAT,
|
|
image->context->display);
|
|
return FALSE;
|
|
}
|
|
egl_display =
|
|
(EGLDisplay) gst_gl_display_get_handle (GST_GL_DISPLAY (display_egl));
|
|
gst_object_unref (display_egl);
|
|
|
|
if (!gst_eglExportDMABUFImageQueryMESA (egl_display, image->image,
|
|
NULL, &num_planes, NULL))
|
|
return FALSE;
|
|
|
|
/* Don't allow multi-plane dmabufs */
|
|
if (num_planes > 1)
|
|
return FALSE;
|
|
|
|
if (!gst_eglExportDMABUFImageMESA (egl_display, image->image, &egl_fd,
|
|
&egl_stride, &egl_offset))
|
|
return FALSE;
|
|
|
|
*fd = egl_fd;
|
|
*stride = egl_stride;
|
|
*offset = egl_offset;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#endif /* GST_GL_HAVE_DMABUF */
|