gstreamer/gst-libs/gst/gl/egl/gstglmemoryegl.c
2019-05-21 01:49:48 +00:00

276 lines
7.9 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>
* Copyright (C) 2015 Igalia
* Author: Gwang Yoon Hwang <yoon@igalia.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.
*/
/**
* SECTION:gstglmemoryegl
* @short_description: memory subclass for EGLImage's
* @title: GstGLMemoryEGL
* @see_also: #GstGLMemory, #GstGLBaseMemoryAllocator, #GstGLBufferPool
*
* #GstGLMemoryEGL is created or wrapped through gst_gl_base_memory_alloc()
* with #GstGLVideoAllocationParams.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstglmemoryegl.h"
#include <gst/gl/gstglfuncs.h>
#include "gstegl.h"
#include "gsteglimage.h"
#include "gstglcontext_egl.h"
static GstAllocator *_gl_memory_egl_allocator;
GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_MEMORY);
#define GST_CAT_DEFAULT GST_CAT_GL_MEMORY
#define parent_class gst_gl_memory_egl_allocator_parent_class
G_DEFINE_TYPE (GstGLMemoryEGLAllocator, gst_gl_memory_egl_allocator,
GST_TYPE_GL_MEMORY_ALLOCATOR);
/**
* gst_is_gl_memory_egl:
* @mem: a #GstMemory to test
*
* Returns: whether @mem is a #GstGLMemoryEGL
*
* Since: 1.10
*/
gboolean
gst_is_gl_memory_egl (GstMemory * mem)
{
return mem != NULL && mem->allocator != NULL
&& g_type_is_a (G_OBJECT_TYPE (mem->allocator),
GST_TYPE_GL_MEMORY_EGL_ALLOCATOR);
}
static GstGLMemoryEGL *
_gl_mem_get_parent (GstGLMemoryEGL * gl_mem)
{
GstGLMemoryEGL *parent = (GstGLMemoryEGL *) gl_mem->mem.mem.mem.parent;
return parent ? parent : gl_mem;
}
/**
* gst_gl_memory_egl_get_image:
* @mem: a #GstGLMemoryEGL
*
* Returns: The EGLImage held by @mem
*
* Since: 1.10
*/
gpointer
gst_gl_memory_egl_get_image (GstGLMemoryEGL * mem)
{
g_return_val_if_fail (gst_is_gl_memory_egl (GST_MEMORY_CAST (mem)),
EGL_NO_IMAGE_KHR);
return gst_egl_image_get_image (_gl_mem_get_parent (mem)->image);
}
/**
* gst_gl_memory_egl_get_display:
* @mem: a #GstGLMemoryEGL
*
* Returns: The EGLDisplay @mem is associated with
*
* Since: 1.10
*/
gpointer
gst_gl_memory_egl_get_display (GstGLMemoryEGL * mem)
{
g_return_val_if_fail (gst_is_gl_memory_egl (GST_MEMORY_CAST (mem)), NULL);
return GST_GL_CONTEXT_EGL (_gl_mem_get_parent (mem)->mem.mem.
context)->egl_display;
}
static GstMemory *
_gl_mem_alloc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
g_warning ("Use gst_gl_base_memory_allocator_alloc() to allocate from this "
"GstGLMemoryEGL allocator");
return NULL;
}
static void
_gl_mem_destroy (GstGLMemoryEGL * mem)
{
if (mem->image)
gst_egl_image_unref (mem->image);
GST_GL_BASE_MEMORY_ALLOCATOR_CLASS (parent_class)->destroy ((GstGLBaseMemory
*) mem);
}
static GstGLMemoryEGL *
_gl_mem_egl_alloc (GstGLBaseMemoryAllocator * allocator,
GstGLVideoAllocationParams * params)
{
guint alloc_flags = params->parent.alloc_flags;
GstGLMemoryEGL *mem;
g_return_val_if_fail (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_VIDEO,
NULL);
g_return_val_if_fail ((alloc_flags &
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_SYSMEM) == 0, NULL);
if (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_GPU_HANDLE) {
g_return_val_if_fail (GST_IS_EGL_IMAGE (params->parent.gl_handle), NULL);
}
mem = g_new0 (GstGLMemoryEGL, 1);
if (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_GPU_HANDLE) {
if (params->target != GST_GL_TEXTURE_TARGET_2D) {
g_free (mem);
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "GstGLMemoryEGL only supports wrapping "
"2D textures");
return NULL;
}
mem->image = gst_egl_image_ref (params->parent.gl_handle);
}
gst_gl_memory_init (GST_GL_MEMORY_CAST (mem), GST_ALLOCATOR_CAST (allocator),
NULL, params->parent.context, params->target, params->tex_format,
params->parent.alloc_params, params->v_info, params->plane,
params->valign, params->parent.user_data, params->parent.notify);
if (!mem->image) {
gst_allocator_free (GST_ALLOCATOR_CAST (allocator), GST_MEMORY_CAST (mem));
return NULL;
}
return mem;
}
static gboolean
_gl_mem_create (GstGLMemoryEGL * gl_mem, GError ** error)
{
GstGLContext *context = gl_mem->mem.mem.context;
const GstGLFuncs *gl = context->gl_vtable;
GstGLBaseMemoryAllocatorClass *alloc_class;
if (!gst_gl_context_check_feature (GST_GL_CONTEXT (context),
"EGL_KHR_image_base")) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_WRONG_API,
"EGL_KHR_image_base is not supported");
return FALSE;
}
alloc_class = GST_GL_BASE_MEMORY_ALLOCATOR_CLASS (parent_class);
if (!alloc_class->create ((GstGLBaseMemory *) gl_mem, error))
return FALSE;
if (gl_mem->image == NULL) {
gl_mem->image = gst_egl_image_from_texture (context,
(GstGLMemory *) gl_mem, NULL);
if (!gl_mem->image) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"Failed to create EGLImage");
return FALSE;
}
} else {
gl->ActiveTexture (GL_TEXTURE0 + gl_mem->mem.plane);
gl->BindTexture (GL_TEXTURE_2D, gl_mem->mem.tex_id);
gl->EGLImageTargetTexture2D (GL_TEXTURE_2D,
gst_egl_image_get_image (GST_EGL_IMAGE (gl_mem->image)));
}
return TRUE;
}
static GstMemory *
_gl_mem_copy (GstGLMemoryEGL * src, gssize offset, gssize size)
{
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "GstGLMemoryEGL does not support copy");
return NULL;
}
static void
gst_gl_memory_egl_allocator_class_init (GstGLMemoryEGLAllocatorClass * klass)
{
GstGLBaseMemoryAllocatorClass *gl_base;
GstGLMemoryAllocatorClass *gl_tex;
GstAllocatorClass *allocator_class;
gl_tex = (GstGLMemoryAllocatorClass *) klass;
gl_base = (GstGLBaseMemoryAllocatorClass *) klass;
allocator_class = (GstAllocatorClass *) klass;
gl_base->alloc = (GstGLBaseMemoryAllocatorAllocFunction) _gl_mem_egl_alloc;
gl_base->create = (GstGLBaseMemoryAllocatorCreateFunction) _gl_mem_create;
gl_base->destroy = (GstGLBaseMemoryAllocatorDestroyFunction) _gl_mem_destroy;
gl_tex->copy = (GstGLBaseMemoryAllocatorCopyFunction) _gl_mem_copy;
allocator_class->alloc = _gl_mem_alloc;
}
static void
gst_gl_memory_egl_allocator_init (GstGLMemoryEGLAllocator * allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_GL_MEMORY_EGL_ALLOCATOR_NAME;
GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
}
/**
* gst_gl_memory_egl_init_once:
*
* Initializes the GL Memory allocator. It is safe to call this function
* multiple times. This must be called before any other GstGLMemoryEGL operation.
*
* Since: 1.10
*/
void
gst_gl_memory_egl_init_once (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
gst_gl_memory_init_once ();
GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_MEMORY, "glmemory", 0,
"OpenGL Texture with EGLImage memory");
_gl_memory_egl_allocator =
g_object_new (GST_TYPE_GL_MEMORY_EGL_ALLOCATOR, NULL);
gst_object_ref_sink (_gl_memory_egl_allocator);
/* The allocator is never unreffed */
GST_OBJECT_FLAG_SET (_gl_memory_egl_allocator,
GST_OBJECT_FLAG_MAY_BE_LEAKED);
gst_allocator_register (GST_GL_MEMORY_EGL_ALLOCATOR_NAME,
gst_object_ref (_gl_memory_egl_allocator));
g_once_init_leave (&_init, 1);
}
}