gstreamer/sys/applemedia/iosurfaceglmemory.c
Matthew Waters 640a65bf96 gst: don't use volatile to mean atomic
volatile is not sufficient to provide atomic guarantees and real atomics
should be used instead.  GCC 11 has started warning about using volatile
with atomic operations.

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719

Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2098>
2021-03-22 14:34:36 +11:00

260 lines
8 KiB
C

/*
* GStreamer
* Copyright (C) 2015 Alessandro Decina <twi@centricular.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "iosurfaceglmemory.h"
GST_DEBUG_CATEGORY_STATIC (GST_CAT_IO_SURFACE_GL_MEMORY);
#define GST_CAT_DEFAULT GST_CAT_IO_SURFACE_GL_MEMORY
G_DEFINE_TYPE (GstIOSurfaceGLMemoryAllocator,
gst_io_surface_gl_memory_allocator, GST_TYPE_GL_MEMORY_ALLOCATOR);
typedef struct
{
GstIOSurfaceGLMemory *memory;
IOSurfaceRef surface;
} ContextThreadData;
static void _io_surface_gl_memory_set_surface (GstIOSurfaceGLMemory * memory,
IOSurfaceRef surface);
static GstAllocator *_io_surface_gl_memory_allocator;
static gboolean
_io_surface_gl_memory_create (GstGLBaseMemory * bmem, GError ** error)
{
GstGLMemory *gl_mem = (GstGLMemory *) bmem;
GstGLContext *context = gl_mem->mem.context;
const GstGLFuncs *gl = context->gl_vtable;
GLuint target;
target = gst_gl_texture_target_to_gl (gl_mem->tex_target);
gl->GenTextures (1, &gl_mem->tex_id);
gl->BindTexture (target, gl_mem->tex_id);
gl->BindTexture (target, 0);
GST_LOG ("generated texture id:%d", gl_mem->tex_id);
return TRUE;
}
static void
_io_surface_gl_memory_destroy (GstGLBaseMemory * gl_mem)
{
GST_GL_BASE_MEMORY_ALLOCATOR_CLASS
(gst_io_surface_gl_memory_allocator_parent_class)->destroy (gl_mem);
_io_surface_gl_memory_set_surface ((GstIOSurfaceGLMemory *) gl_mem, NULL);
}
static gpointer
_io_surface_gl_memory_allocator_map (GstGLBaseMemory * bmem,
GstMapInfo * info, gsize size)
{
GstGLMemory *gl_mem = (GstGLMemory *) bmem;
GstIOSurfaceGLMemory *mem = (GstIOSurfaceGLMemory *) gl_mem;
GST_LOG ("mapping surface %p flags %d gl? %d",
mem->surface, info->flags, ((info->flags & GST_MAP_GL) != 0));
if (info->flags & GST_MAP_GL) {
return &gl_mem->tex_id;
} else if (!(info->flags & GST_MAP_WRITE)) {
IOSurfaceLock (mem->surface, kIOSurfaceLockReadOnly, NULL);
return IOSurfaceGetBaseAddressOfPlane (mem->surface, gl_mem->plane);
} else {
GST_ERROR ("couldn't map IOSurface %p flags %d", mem->surface, info->flags);
return NULL;
}
}
static void
_io_surface_gl_memory_allocator_unmap (GstGLBaseMemory * bmem,
GstMapInfo * info)
{
GstGLMemory *gl_mem = (GstGLMemory *) bmem;
GstIOSurfaceGLMemory *mem = (GstIOSurfaceGLMemory *) gl_mem;
GST_LOG ("unmapping surface %p flags %d gl? %d",
mem->surface, info->flags, ((info->flags & GST_MAP_GL) != 0));
if (!(info->flags & GST_MAP_GL)) {
IOSurfaceUnlock (mem->surface, kIOSurfaceLockReadOnly, NULL);
}
}
static GstMemory *
_mem_alloc (GstAllocator * allocator, gsize size, GstAllocationParams * params)
{
g_warning ("use gst_io_surface_gl_memory_wrapped () to allocate from this "
"IOSurface allocator");
return NULL;
}
static void
gst_io_surface_gl_memory_allocator_class_init
(GstIOSurfaceGLMemoryAllocatorClass * klass)
{
GstAllocatorClass *allocator_class = (GstAllocatorClass *) klass;
GstGLBaseMemoryAllocatorClass *gl_base_allocator_class =
(GstGLBaseMemoryAllocatorClass *) klass;
allocator_class->alloc = _mem_alloc;
gl_base_allocator_class->create = _io_surface_gl_memory_create;
gl_base_allocator_class->destroy = _io_surface_gl_memory_destroy;
gl_base_allocator_class->map = _io_surface_gl_memory_allocator_map;
gl_base_allocator_class->unmap = _io_surface_gl_memory_allocator_unmap;
}
static void
gst_io_surface_gl_memory_allocator_init (GstIOSurfaceGLMemoryAllocator *
allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_IO_SURFACE_GL_MEMORY_ALLOCATOR_NAME;
GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
}
void
gst_ios_surface_gl_memory_init (void)
{
static gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_IO_SURFACE_GL_MEMORY, "iosurfacegl", 0,
"IOSurface Buffer");
_io_surface_gl_memory_allocator =
g_object_new (GST_TYPE_IO_SURFACE_GL_MEMORY_ALLOCATOR, NULL);
gst_object_ref_sink (_io_surface_gl_memory_allocator);
gst_allocator_register (GST_IO_SURFACE_GL_MEMORY_ALLOCATOR_NAME,
gst_object_ref (_io_surface_gl_memory_allocator));
g_once_init_leave (&_init, 1);
}
}
gboolean
gst_is_io_surface_gl_memory (GstMemory * mem)
{
return mem != NULL && mem->allocator != NULL &&
g_type_is_a (G_OBJECT_TYPE (mem->allocator),
GST_TYPE_IO_SURFACE_GL_MEMORY_ALLOCATOR);
}
static GstIOSurfaceGLMemory *
_io_surface_gl_memory_new (GstGLContext * context,
IOSurfaceRef surface,
GstGLTextureTarget target,
GstGLFormat tex_format,
GstVideoInfo * info,
guint plane,
GstVideoAlignment * valign, gpointer user_data, GDestroyNotify notify)
{
GstIOSurfaceGLMemory *mem;
g_return_val_if_fail (target == GST_GL_TEXTURE_TARGET_RECTANGLE, NULL);
mem = g_new0 (GstIOSurfaceGLMemory, 1);
gst_gl_memory_init (&mem->gl_mem, _io_surface_gl_memory_allocator, NULL,
context, target, tex_format, NULL, info, plane, valign, user_data,
notify);
GST_MINI_OBJECT_FLAG_SET (mem, GST_MEMORY_FLAG_READONLY);
mem->surface = NULL;
gst_io_surface_gl_memory_set_surface (mem, surface);
return mem;
}
GstIOSurfaceGLMemory *
gst_io_surface_gl_memory_wrapped (GstGLContext * context,
IOSurfaceRef surface,
GstGLTextureTarget target,
GstGLFormat tex_format,
GstVideoInfo * info,
guint plane,
GstVideoAlignment * valign, gpointer user_data, GDestroyNotify notify)
{
return _io_surface_gl_memory_new (context, surface, target, tex_format, info,
plane, valign, user_data, notify);
}
static void
_io_surface_gl_memory_set_surface (GstIOSurfaceGLMemory * memory,
IOSurfaceRef surface)
{
GstGLMemory *gl_mem = (GstGLMemory *) memory;
GstGLContext *context = ((GstGLBaseMemory *) gl_mem)->context;
GstGLFuncs *gl = context->gl_vtable;
if (memory->surface)
IOSurfaceDecrementUseCount (memory->surface);
memory->surface = surface;
if (surface) {
GLuint tex_id, tex_target, texifmt, texfmt;
guint plane;
CGLError cglError;
plane = gl_mem->plane;
tex_id = gl_mem->tex_id;
tex_target = gst_gl_texture_target_to_gl (gl_mem->tex_target);
texifmt = gst_gl_format_from_video_info (context, &gl_mem->info, plane);
texfmt =
gst_gl_sized_gl_format_from_gl_format_type (context, texifmt,
GL_UNSIGNED_BYTE);
gl->BindTexture (tex_target, tex_id);
cglError = CGLTexImageIOSurface2D ((CGLContextObj)
gst_gl_context_get_gl_context (context), tex_target, texifmt,
IOSurfaceGetWidthOfPlane (surface, plane),
IOSurfaceGetHeightOfPlane (surface, plane), texifmt, GL_UNSIGNED_BYTE,
surface, plane);
gl->BindTexture (tex_target, 0);
IOSurfaceIncrementUseCount (surface);
GST_DEBUG ("bound surface %p to texture %u: %d", surface, tex_id, cglError);
}
}
static void
_do_set_surface (GstGLContext * context, ContextThreadData * data)
{
_io_surface_gl_memory_set_surface (data->memory, data->surface);
}
void
gst_io_surface_gl_memory_set_surface (GstIOSurfaceGLMemory * memory,
IOSurfaceRef surface)
{
GstGLContext *context;
ContextThreadData data = { memory, surface };
g_return_if_fail (gst_is_io_surface_gl_memory ((GstMemory *) memory));
context = memory->gl_mem.mem.context;
gst_gl_context_thread_add (context,
(GstGLContextThreadFunc) _do_set_surface, &data);
}