gstreamer/gst-libs/gst/egl/egl.c

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/*
* GStreamer EGL Library
* Copyright (C) 2012 Collabora Ltd.
* @author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
* *
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if defined (USE_EGL_RPI) && defined(__GNUC__)
#ifndef __VCCOREVER__
#define __VCCOREVER__ 0x04000000
#endif
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wredundant-decls"
#pragma GCC optimize ("gnu89-inline")
#endif
#define EGL_EGLEXT_PROTOTYPES
#include <gst/egl/egl.h>
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#include <string.h>
#if defined (USE_EGL_RPI) && defined(__GNUC__)
#pragma GCC reset_options
#pragma GCC diagnostic pop
#endif
typedef struct
{
GstMemory parent;
GstEGLDisplay *display;
EGLImageKHR image;
GstVideoGLTextureType type;
GstVideoGLTextureOrientation orientation;
gpointer user_data;
GDestroyNotify user_data_destroy;
} GstEGLImageMemory;
#define GST_EGL_IMAGE_MEMORY(mem) ((GstEGLImageMemory*)(mem))
gboolean
gst_egl_image_memory_is_mappable (void)
{
return FALSE;
}
gboolean
gst_is_egl_image_memory (GstMemory * mem)
{
g_return_val_if_fail (mem != NULL, FALSE);
g_return_val_if_fail (mem->allocator != NULL, FALSE);
return g_strcmp0 (mem->allocator->mem_type, GST_EGL_IMAGE_MEMORY_TYPE) == 0;
}
EGLImageKHR
gst_egl_image_memory_get_image (GstMemory * mem)
{
g_return_val_if_fail (gst_is_egl_image_memory (mem), EGL_NO_IMAGE_KHR);
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if (mem->parent)
mem = mem->parent;
return GST_EGL_IMAGE_MEMORY (mem)->image;
}
GstEGLDisplay *
gst_egl_image_memory_get_display (GstMemory * mem)
{
g_return_val_if_fail (gst_is_egl_image_memory (mem), NULL);
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if (mem->parent)
mem = mem->parent;
return gst_egl_display_ref (GST_EGL_IMAGE_MEMORY (mem)->display);
}
GstVideoGLTextureType
gst_egl_image_memory_get_type (GstMemory * mem)
{
g_return_val_if_fail (gst_is_egl_image_memory (mem), -1);
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if (mem->parent)
mem = mem->parent;
return GST_EGL_IMAGE_MEMORY (mem)->type;
}
GstVideoGLTextureOrientation
gst_egl_image_memory_get_orientation (GstMemory * mem)
{
g_return_val_if_fail (gst_is_egl_image_memory (mem),
GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_NORMAL);
if (mem->parent)
mem = mem->parent;
return GST_EGL_IMAGE_MEMORY (mem)->orientation;
}
void
gst_egl_image_memory_set_orientation (GstMemory * mem,
GstVideoGLTextureOrientation orientation)
{
g_return_if_fail (gst_is_egl_image_memory (mem));
if (mem->parent)
mem = mem->parent;
GST_EGL_IMAGE_MEMORY (mem)->orientation = orientation;
}
static GstMemory *
gst_egl_image_allocator_alloc_vfunc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
g_warning
("Use gst_egl_image_allocator_alloc() to allocate from this allocator");
return NULL;
}
static void
gst_egl_image_allocator_free_vfunc (GstAllocator * allocator, GstMemory * mem)
{
GstEGLImageMemory *emem = (GstEGLImageMemory *) mem;
EGLDisplay display;
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g_return_if_fail (gst_is_egl_image_memory (mem));
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/* Shared memory should not destroy all the data */
if (!mem->parent) {
display = gst_egl_display_get (emem->display);
eglDestroyImageKHR (display, emem->image);
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if (emem->user_data_destroy)
emem->user_data_destroy (emem->user_data);
gst_egl_display_unref (emem->display);
}
g_slice_free (GstEGLImageMemory, emem);
}
static gpointer
gst_egl_image_mem_map (GstMemory * mem, gsize maxsize, GstMapFlags flags)
{
return NULL;
}
static void
gst_egl_image_mem_unmap (GstMemory * mem)
{
}
static GstMemory *
gst_egl_image_mem_share (GstMemory * mem, gssize offset, gssize size)
{
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GstMemory *sub;
GstMemory *parent;
if (offset != 0)
return NULL;
if (size != -1 && size != mem->size)
return NULL;
/* find the real parent */
if ((parent = mem->parent) == NULL)
parent = (GstMemory *) mem;
if (size == -1)
size = mem->size - offset;
sub = (GstMemory *) g_slice_new (GstEGLImageMemory);
/* the shared memory is always readonly */
gst_memory_init (GST_MEMORY_CAST (sub), GST_MINI_OBJECT_FLAGS (parent) |
GST_MINI_OBJECT_FLAG_LOCK_READONLY, mem->allocator, parent,
mem->maxsize, mem->align, mem->offset + offset, size);
return sub;
}
static GstMemory *
gst_egl_image_mem_copy (GstMemory * mem, gssize offset, gssize size)
{
return NULL;
}
static gboolean
gst_egl_image_mem_is_span (GstMemory * mem1, GstMemory * mem2, gsize * offset)
{
return FALSE;
}
typedef GstAllocator GstEGLImageAllocator;
typedef GstAllocatorClass GstEGLImageAllocatorClass;
GType gst_egl_image_allocator_get_type (void);
G_DEFINE_TYPE (GstEGLImageAllocator, gst_egl_image_allocator,
GST_TYPE_ALLOCATOR);
#define GST_TYPE_EGL_IMAGE_ALLOCATOR (gst_egl_image_mem_allocator_get_type())
#define GST_IS_EGL_IMAGE_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EGL_IMAGE_ALLOCATOR))
static void
gst_egl_image_allocator_class_init (GstEGLImageAllocatorClass * klass)
{
GstAllocatorClass *allocator_class = (GstAllocatorClass *) klass;
allocator_class->alloc = gst_egl_image_allocator_alloc_vfunc;
allocator_class->free = gst_egl_image_allocator_free_vfunc;
}
static void
gst_egl_image_allocator_init (GstEGLImageAllocator * allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_EGL_IMAGE_MEMORY_TYPE;
alloc->mem_map = gst_egl_image_mem_map;
alloc->mem_unmap = gst_egl_image_mem_unmap;
alloc->mem_share = gst_egl_image_mem_share;
alloc->mem_copy = gst_egl_image_mem_copy;
alloc->mem_is_span = gst_egl_image_mem_is_span;
GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
}
static gpointer
gst_egl_image_allocator_init_instance (gpointer data)
{
return g_object_new (gst_egl_image_allocator_get_type (), NULL);
}
GstAllocator *
gst_egl_image_allocator_obtain (void)
{
static GOnce once = G_ONCE_INIT;
g_once (&once, gst_egl_image_allocator_init_instance, NULL);
g_return_val_if_fail (once.retval != NULL, NULL);
return GST_ALLOCATOR (g_object_ref (once.retval));
}
GstMemory *
gst_egl_image_allocator_alloc (GstAllocator * allocator,
GstEGLDisplay * display, GstVideoGLTextureType type, gint width,
gint height, gsize * size)
{
return NULL;
}
GstMemory *
gst_egl_image_allocator_wrap (GstAllocator * allocator,
GstEGLDisplay * display, EGLImageKHR image, GstVideoGLTextureType type,
GstMemoryFlags flags, gsize size, gpointer user_data,
GDestroyNotify user_data_destroy)
{
GstEGLImageMemory *mem;
g_return_val_if_fail (display != NULL, NULL);
g_return_val_if_fail (image != EGL_NO_IMAGE_KHR, NULL);
if (!allocator) {
allocator = gst_egl_image_allocator_obtain ();
}
mem = g_slice_new (GstEGLImageMemory);
gst_memory_init (GST_MEMORY_CAST (mem), flags,
allocator, NULL, size, 0, 0, size);
mem->display = gst_egl_display_ref (display);
mem->image = image;
mem->type = type;
mem->orientation = GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_NORMAL;
mem->user_data = user_data;
mem->user_data_destroy = user_data_destroy;
return GST_MEMORY_CAST (mem);
}
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GstContext *
gst_context_new_egl_display (GstEGLDisplay * display, gboolean persistent)
{
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GstContext *context;
GstStructure *s;
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context = gst_context_new (GST_EGL_DISPLAY_CONTEXT_TYPE, persistent);
s = gst_context_writable_structure (context);
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gst_structure_set (s, "display", GST_TYPE_EGL_DISPLAY, display, NULL);
return context;
}
gboolean
gst_context_get_egl_display (GstContext * context, GstEGLDisplay ** display)
{
const GstStructure *s;
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g_return_val_if_fail (GST_IS_CONTEXT (context), FALSE);
g_return_val_if_fail (strcmp (gst_context_get_context_type (context),
GST_EGL_DISPLAY_CONTEXT_TYPE) == 0, FALSE);
s = gst_context_get_structure (context);
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return gst_structure_get (s, "display", GST_TYPE_EGL_DISPLAY, display, NULL);
}
struct _GstEGLDisplay
{
EGLDisplay display;
volatile gint refcount;
GDestroyNotify destroy_notify;
};
GstEGLDisplay *
gst_egl_display_new (EGLDisplay display, GDestroyNotify destroy_notify)
{
GstEGLDisplay *gdisplay;
gdisplay = g_slice_new (GstEGLDisplay);
gdisplay->display = display;
gdisplay->refcount = 1;
gdisplay->destroy_notify = destroy_notify;
return gdisplay;
}
GstEGLDisplay *
gst_egl_display_ref (GstEGLDisplay * display)
{
g_return_val_if_fail (display != NULL, NULL);
g_atomic_int_inc (&display->refcount);
return display;
}
void
gst_egl_display_unref (GstEGLDisplay * display)
{
g_return_if_fail (display != NULL);
if (g_atomic_int_dec_and_test (&display->refcount)) {
if (display->destroy_notify)
display->destroy_notify (display->display);
g_slice_free (GstEGLDisplay, display);
}
}
EGLDisplay
gst_egl_display_get (GstEGLDisplay * display)
{
g_return_val_if_fail (display != NULL, EGL_NO_DISPLAY);
return display->display;
}
G_DEFINE_BOXED_TYPE (GstEGLDisplay, gst_egl_display,
(GBoxedCopyFunc) gst_egl_display_ref,
(GBoxedFreeFunc) gst_egl_display_unref);