--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2015 Matthew Waters <matthew@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 <string.h>
+
+#include "gstglbuffer.h"
+#include "gstglutils.h"
+
+/**
+ * SECTION:gstglbuffer
+ * @short_description: memory subclass for GL buffers
+ * @see_also: #GstMemory, #GstAllocator
+ *
+ * GstGLBuffer is a #GstMemory subclass providing support for the mapping of
+ * GL buffers.
+ *
+ * Data is uploaded or downloaded from the GPU as is necessary.
+ */
+
+/* Implementation notes:
+ *
+ * Currently does not take into account GLES2 differences (no mapbuffer)
+ */
+
+#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
+#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
+#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
+#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
+#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
+
+/* compatibility definitions... */
+#ifndef GL_MAP_READ_BIT
+#define GL_MAP_READ_BIT 0x0001
+#endif
+#ifndef GL_MAP_WRITE_BIT
+#define GL_MAP_WRITE_BIT 0x0002
+#endif
+#ifndef GL_COPY_READ_BUFFER
+#define GL_COPY_READ_BUFFER 0x8F36
+#endif
+#ifndef GL_COPY_WRITE_BUFFER
+#define GL_COPY_WRITE_BUFFER 0x8F37
+#endif
+
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_BUFFER);
+#define GST_CAT_DEFUALT GST_CAT_GL_BUFFER
+
+static GstAllocator *_gl_buffer_allocator;
+
+static gboolean
+_gl_buffer_create (GstGLBuffer * gl_mem, GError ** error)
+{
+ const GstGLFuncs *gl = gl_mem->mem.context->gl_vtable;
+
+ gl->GenBuffers (1, &gl_mem->id);
+ gl->BindBuffer (gl_mem->target, gl_mem->id);
+ gl->BufferData (gl_mem->target, gl_mem->mem.mem.maxsize, NULL,
+ gl_mem->usage_hints);
+ gl->BindBuffer (gl_mem->target, 0);
+
+ return TRUE;
+}
+
+struct create_data
+{
+ GstGLBuffer *mem;
+ gboolean result;
+};
+
+static void
+_gl_buffer_init (GstGLBuffer * mem, GstAllocator * allocator,
+ GstMemory * parent, GstGLContext * context, guint gl_target, guint gl_usage,
+ GstAllocationParams * params, gsize size)
+{
+ mem->target = gl_target;
+ mem->usage_hints = gl_usage;
+
+ gst_gl_base_memory_init ((GstGLBaseMemory *) mem, allocator, parent, context,
+ params, size, NULL, NULL);
+
+ GST_CAT_DEBUG (GST_CAT_GL_BUFFER, "new GL buffer memory:%p size:%"
+ G_GSIZE_FORMAT, mem, mem->mem.mem.maxsize);
+}
+
+static GstGLBuffer *
+_gl_buffer_new (GstAllocator * allocator, GstMemory * parent,
+ GstGLContext * context, guint gl_target, guint gl_usage,
+ GstAllocationParams * params, gsize size)
+{
+ GstGLBuffer *ret = g_new0 (GstGLBuffer, 1);
+ _gl_buffer_init (ret, allocator, parent, context, gl_target, gl_usage,
+ params, size);
+
+ return ret;
+}
+
+static gpointer
+gst_gl_buffer_cpu_access (GstGLBuffer * mem, GstMapInfo * info, gsize size)
+{
+ const GstGLFuncs *gl = mem->mem.context->gl_vtable;
+ gpointer data, ret;
+
+ if (!gst_gl_base_memory_alloc_data (GST_GL_BASE_MEMORY_CAST (mem)))
+ return NULL;
+
+ ret = mem->mem.data;
+
+ GST_CAT_LOG (GST_CAT_GL_BUFFER, "mapping id %d size %" G_GSIZE_FORMAT,
+ mem->id, size);
+
+ /* The extra data pointer indirection/memcpy is needed for coherent across
+ * concurrent map()'s in both GL and CPU */
+ if (GST_MEMORY_FLAG_IS_SET (mem, GST_GL_BUFFER_FLAG_NEED_DOWNLOAD)
+ && (info->flags & GST_MAP_GL) == 0 && (info->flags & GST_MAP_READ) != 0) {
+ gl->BindBuffer (mem->target, mem->id);
+
+ if (gl->MapBufferRange) {
+ /* FIXME: optionally remove this with a flag and return the
+ * glMapBufferRange pointer (requires
+ * GL_ARB_buffer_storage/GL4/GL_COHERENT_BIT) */
+ guint gl_map_flags = GL_MAP_READ_BIT;
+
+ data = gl->MapBufferRange (mem->target, 0, size, gl_map_flags);
+
+ if (data)
+ memcpy (mem->mem.data, data, size);
+
+ gl->UnmapBuffer (mem->target);
+ ret = mem->mem.data;
+ } else if (gl->GetBufferSubData) {
+ gl->GetBufferSubData (mem->target, 0, size, mem->mem.data);
+ ret = mem->mem.data;
+ } else {
+ ret = NULL;
+ }
+ gl->BindBuffer (mem->target, 0);
+ }
+
+ return ret;
+}
+
+static void
+gst_gl_buffer_upload_cpu_write (GstGLBuffer * mem, GstMapInfo * info,
+ gsize size)
+{
+ const GstGLFuncs *gl = mem->mem.context->gl_vtable;
+ gpointer data;
+
+ if (!mem->mem.data)
+ /* no data pointer has been written */
+ return;
+
+ /* The extra data pointer indirection/memcpy is needed for coherent across
+ * concurrent map()'s in both GL and CPU */
+ /* FIXME: uploading potentially half-written data for libav pushing READWRITE
+ * mapped buffers */
+ if (GST_MEMORY_FLAG_IS_SET (mem, GST_GL_BUFFER_FLAG_NEED_UPLOAD)
+ || (mem->mem.map_flags & GST_MAP_WRITE) != 0) {
+ gl->BindBuffer (mem->target, mem->id);
+
+ if (gl->MapBufferRange) {
+ /* FIXME: optionally remove this with a flag and return the
+ * glMapBufferRange pointer (requires
+ * GL_ARB_buffer_storage/GL4/GL_COHERENT_BIT) */
+ guint gl_map_flags = GL_MAP_WRITE_BIT;
+
+ data = gl->MapBufferRange (mem->target, 0, size, gl_map_flags);
+
+ if (data)
+ memcpy (data, mem->mem.data, size);
+
+ gl->UnmapBuffer (mem->target);
+ } else if (gl->BufferSubData) {
+ gl->BufferSubData (mem->target, 0, size, mem->mem.data);
+ }
+ gl->BindBuffer (mem->target, 0);
+ }
+}
+
+static gpointer
+_gl_buffer_map (GstGLBuffer * mem, GstMapInfo * info, gsize size)
+{
+ if ((info->flags & GST_MAP_GL) != 0) {
+ if (info->flags & GST_MAP_READ) {
+ gst_gl_buffer_upload_cpu_write (mem, info, size);
+ }
+ return &mem->id;
+ } else {
+ return gst_gl_buffer_cpu_access (mem, info, size);
+ }
+
+ return NULL;
+}
+
+static void
+_gl_buffer_unmap (GstGLBuffer * mem, GstMapInfo * info)
+{
+ /* XXX: optimistically transfer data */
+}
+
+static gboolean
+gst_gl_buffer_copy_buffer_sub_data (GstGLBuffer * src,
+ GstGLBuffer * dest, gssize offset, gssize size)
+{
+ const GstGLFuncs *gl = src->mem.context->gl_vtable;
+ GstMapInfo sinfo, dinfo;
+
+ if (!gl->CopyBufferSubData)
+ /* This is GL(ES) 3.0+ only */
+ return FALSE;
+
+ if (!gst_memory_map ((GstMemory *) src, &sinfo, GST_MAP_READ | GST_MAP_GL)) {
+ GST_CAT_WARNING (GST_CAT_GL_BUFFER,
+ "failed to read map source memory %p", src);
+ return FALSE;
+ }
+
+ if (!gst_memory_map ((GstMemory *) dest, &dinfo, GST_MAP_WRITE | GST_MAP_GL)) {
+ GST_CAT_WARNING (GST_CAT_GL_BUFFER,
+ "failed to write map destination memory %p", dest);
+ gst_memory_unmap ((GstMemory *) src, &sinfo);
+ return FALSE;
+ }
+
+ gl->BindBuffer (GL_COPY_READ_BUFFER, src->id);
+ gl->BindBuffer (GL_COPY_WRITE_BUFFER, dest->id);
+ gl->CopyBufferSubData (GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
+ offset, 0, size);
+
+ gst_memory_unmap ((GstMemory *) src, &sinfo);
+ gst_memory_unmap ((GstMemory *) dest, &dinfo);
+
+ return TRUE;
+}
+
+static GstGLBuffer *
+_gl_buffer_copy (GstGLBuffer * src, gssize offset, gssize size)
+{
+ GstAllocator *allocator = src->mem.mem.allocator;
+ GstAllocationParams params = { 0, src->mem.mem.align, 0, 0 };
+ GstGLBuffer *dest = NULL;
+
+ dest = _gl_buffer_new (allocator, NULL, src->mem.context,
+ src->target, src->usage_hints, ¶ms, src->mem.mem.maxsize);
+
+ /* If not doing a full copy, then copy to sysmem, the 2D represention of the
+ * texture would become wrong */
+ if (GST_MEMORY_FLAG_IS_SET (src, GST_GL_BASE_MEMORY_TRANSFER_NEED_UPLOAD)) {
+ if (!gst_gl_base_memory_memcpy (GST_GL_BASE_MEMORY_CAST (src),
+ GST_GL_BASE_MEMORY_CAST (dest), offset, size)) {
+ GST_CAT_WARNING (GST_CAT_GL_BUFFER, "Could not copy GL Buffer");
+ gst_memory_unref (GST_MEMORY_CAST (dest));
+ dest = NULL;
+ }
+ } else {
+ if (!gst_gl_buffer_copy_buffer_sub_data (src, dest, offset, size)) {
+ if (!gst_gl_base_memory_memcpy (GST_GL_BASE_MEMORY_CAST (src),
+ GST_GL_BASE_MEMORY_CAST (dest), offset, size)) {
+ GST_CAT_WARNING (GST_CAT_GL_BUFFER, "Could not copy GL Buffer");
+ gst_memory_unref (GST_MEMORY_CAST (dest));
+ dest = NULL;
+ }
+ }
+ }
+
+ return dest;
+}
+
+static GstMemory *
+_gl_buffer_alloc (GstAllocator * allocator, gsize size,
+ GstAllocationParams * params)
+{
+ g_critical ("Need to use gst_gl_buffer_alloc() to allocate from "
+ "this allocator");
+
+ return NULL;
+}
+
+static void
+_gl_buffer_destroy (GstGLBuffer * mem)
+{
+ const GstGLFuncs *gl = mem->mem.context->gl_vtable;
+
+ gl->DeleteBuffers (1, &mem->id);
+}
+
+G_DEFINE_TYPE (GstGLBufferAllocator, gst_gl_buffer_allocator,
+ GST_TYPE_GL_BASE_MEMORY_ALLOCATOR);
+
+static void
+gst_gl_buffer_allocator_class_init (GstGLBufferAllocatorClass * klass)
+{
+ GstAllocatorClass *allocator_class = (GstAllocatorClass *) klass;
+ GstGLBaseMemoryAllocatorClass *gl_base;
+
+ gl_base = (GstGLBaseMemoryAllocatorClass *) klass;
+
+ gl_base->create = (GstGLBaseMemoryAllocatorCreateFunction) _gl_buffer_create;
+ gl_base->map = (GstGLBaseMemoryAllocatorMapFunction) _gl_buffer_map;
+ gl_base->unmap = (GstGLBaseMemoryAllocatorUnmapFunction) _gl_buffer_unmap;
+ gl_base->copy = (GstGLBaseMemoryAllocatorCopyFunction) _gl_buffer_copy;
+ gl_base->destroy =
+ (GstGLBaseMemoryAllocatorDestroyFunction) _gl_buffer_destroy;
+
+ allocator_class->alloc = _gl_buffer_alloc;
+}
+
+static void
+gst_gl_buffer_allocator_init (GstGLBufferAllocator * allocator)
+{
+}
+
+/**
+ * gst_gl_buffer_init_once:
+ *
+ * Initializes the GL Buffer allocator. It is safe to call this function
+ * multiple times. This must be called before any other GstGLBuffer operation.
+ */
+void
+gst_gl_buffer_init_once (void)
+{
+ static volatile gsize _init = 0;
+
+ if (g_once_init_enter (&_init)) {
+ gst_gl_base_memory_init_once ();
+
+ GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_BUFFER, "glbuffer", 0, "OpenGL Buffer");
+
+ _gl_buffer_allocator =
+ g_object_new (gst_gl_buffer_allocator_get_type (), NULL);
+
+ gst_allocator_register (GST_GL_BUFFER_ALLOCATOR_NAME,
+ gst_object_ref (_gl_buffer_allocator));
+ g_once_init_leave (&_init, 1);
+ }
+}
+
+/**
+ * gst_is_gl_buffer:
+ * @mem:a #GstMemory
+ *
+ * Returns: whether the memory at @mem is a #GstGLBuffer
+ */
+gboolean
+gst_is_gl_buffer (GstMemory * mem)
+{
+ return mem != NULL && mem->allocator != NULL &&
+ g_type_is_a (G_OBJECT_TYPE (mem->allocator),
+ GST_TYPE_GL_BUFFER_ALLOCATOR);
+}
+
+GstGLBuffer *
+gst_gl_buffer_alloc (GstGLContext * context, guint gl_target, guint gl_usage,
+ GstAllocationParams * params, gsize maxsize)
+{
+ return _gl_buffer_new (_gl_buffer_allocator, NULL, context, gl_target,
+ gl_usage, params, maxsize);
+}
--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2015 Matthew Waters <matthew@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.
+ */
+
+#ifndef _GST_GL_BUFFER_H_
+#define _GST_GL_BUFFER_H_
+
+#include <gst/gst.h>
+#include <gst/gstallocator.h>
+#include <gst/gstmemory.h>
+
+#include <gst/gl/gstglbasememory.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_GL_BUFFER_ALLOCATOR (gst_gl_buffer_allocator_get_type())
+GType gst_gl_buffer_allocator_get_type(void);
+
+#define GST_IS_GL_BUFFER_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GL_ALLOCATOR))
+#define GST_IS_GL_BUFFER_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GL_BUFFER_ALLOCATOR))
+#define GST_GL_BUFFER_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_GL_BUFFER_ALLOCATOR, GstGLBufferAllocatorClass))
+#define GST_GL_BUFFER_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GL_BUFFER_ALLOCATOR, GstGLBufferAllocator))
+#define GST_GL_BUFFER_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GL_BUFFER_ALLOCATOR, GstGLBufferAllocatorClass))
+#define GST_GL_BUFFER_ALLOCATOR_CAST(obj) ((GstGLBufferAllocator *)(obj))
+
+
+typedef enum
+{
+ GST_GL_BUFFER_FLAG_NEED_DOWNLOAD = (GST_MEMORY_FLAG_LAST << 0),
+ GST_GL_BUFFER_FLAG_NEED_UPLOAD = (GST_MEMORY_FLAG_LAST << 1)
+} GstGLBufferFlags;
+
+/**
+ * GST_MAP_GL:
+ *
+ * Flag indicating that we should map the GL object instead of to system memory.
+ *
+ * Combining #GST_MAP_GL with #GST_MAP_WRITE has the same semantics as though
+ * you are writing to OpenGL. Conversely, combining #GST_MAP_GL with
+ * #GST_MAP_READ has the same semantics as though you are reading from OpenGL.
+ */
+#define GST_MAP_GL (GST_MAP_FLAG_LAST << 1)
+
+/**
+ * GstGLBuffer:
+ * @mem: the parent object
+ * @context: the #GstGLContext to use for GL operations
+ * @id: the buffer id for this memory
+ * @target: the GL target of this texture for binding purposes
+ *
+ * Represents information about a GL buffer
+ */
+struct _GstGLBuffer
+{
+ GstGLBaseMemory mem;
+
+ guint id;
+ guint target; /* XXX: put this in the allocator? */
+ guint usage_hints; /* XXX: put this in the allocator? */
+};
+
+/**
+ * GstGLBufferAllocator
+ *
+ * Opaque #GstGLAllocator struct
+ */
+struct _GstGLBufferAllocator
+{
+ GstGLBaseMemoryAllocator parent;
+};
+
+/**
+ * GstGLBufferAllocatorClass:
+ *
+ * The #GstGLBufferAllocatorClass only contains private data
+ */
+struct _GstGLBufferAllocatorClass
+{
+ GstGLBaseMemoryAllocatorClass parent_class;
+};
+
+#define GST_CAPS_FEATURE_MEMORY_GL_BUFFER "memory:GLBuffer"
+
+/**
+ * GST_GL_BUFFER_ALLOCATOR_NAME:
+ *
+ * The name of the GL buffer allocator
+ */
+#define GST_GL_BUFFER_ALLOCATOR_NAME "GLBuffer"
+
+void gst_gl_buffer_init_once (void);
+gboolean gst_is_gl_buffer (GstMemory * mem);
+
+GstGLBuffer * gst_gl_buffer_alloc (GstGLContext * context,
+ guint gl_target,
+ guint gl_usage,
+ GstAllocationParams * params,
+ gsize maxsize);
+
+G_END_DECLS
+
+#endif /* _GST_GL_BUFFER_H_ */
projects / platform / upstream / gst-plugins-base.git / commitdiff