gstreamer/gst-libs/gst/gl/gstglsyncmeta.c

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/*
* GStreamer
* Copyright (C) 2014 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.
*/
/**
* SECTION:gstglsyncmeta
* @title: GstGLSyncMeta
* @short_description: synchronization primitives
* @see_also: #GstGLBaseMemory, #GstGLContext
*
* #GstGLSyncMeta provides the ability to synchronize the OpenGL command stream
* with the CPU or with other OpenGL contexts.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglsyncmeta.h"
#include "gstglcontext.h"
#include "gstglfuncs.h"
GST_DEBUG_CATEGORY_STATIC (gst_gl_sync_meta_debug);
#define GST_CAT_DEFAULT gst_gl_sync_meta_debug
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#ifndef GL_SYNC_GPU_COMMANDS_COMPLETE
#define GL_SYNC_GPU_COMMANDS_COMPLETE 0x9117
#endif
#ifndef GL_SYNC_FLUSH_COMMANDS_BIT
#define GL_SYNC_FLUSH_COMMANDS_BIT 0x00000001
#endif
#ifndef GL_TIMEOUT_EXPIRED
#define GL_TIMEOUT_EXPIRED 0x911B
#endif
#ifndef GL_TIMEOUT_IGNORED
#define GL_TIMEOUT_IGNORED G_GUINT64_CONSTANT(0xFFFFFFFFFFFFFFFF)
#endif
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static void
_default_set_sync_gl (GstGLSyncMeta * sync_meta, GstGLContext * context)
{
const GstGLFuncs *gl = context->gl_vtable;
if (gl->FenceSync) {
if (sync_meta->data) {
GST_LOG ("deleting sync object %p", sync_meta->data);
gl->DeleteSync ((GLsync) sync_meta->data);
}
sync_meta->data =
(gpointer) gl->FenceSync (GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
GST_LOG ("setting sync object %p", sync_meta->data);
}
if (gst_gl_context_is_shared (context))
gl->Flush ();
}
static void
_default_wait_gl (GstGLSyncMeta * sync_meta, GstGLContext * context)
{
const GstGLFuncs *gl = context->gl_vtable;
if (sync_meta->data && gl->WaitSync) {
GST_LOG ("waiting on sync object %p", sync_meta->data);
gl->WaitSync ((GLsync) sync_meta->data, 0, GL_TIMEOUT_IGNORED);
}
}
static void
_default_wait_cpu_gl (GstGLSyncMeta * sync_meta, GstGLContext * context)
{
const GstGLFuncs *gl = context->gl_vtable;
GLenum res;
if (sync_meta->data && gl->ClientWaitSync) {
do {
GST_LOG ("waiting on sync object %p", sync_meta->data);
res =
gl->ClientWaitSync ((GLsync) sync_meta->data,
GL_SYNC_FLUSH_COMMANDS_BIT, 1000000000 /* 1s */ );
} while (res == GL_TIMEOUT_EXPIRED);
} else {
gl->Finish ();
}
}
static void
_default_copy (GstGLSyncMeta * src, GstBuffer * sbuffer, GstGLSyncMeta * dest,
GstBuffer * dbuffer)
{
GST_LOG ("copy sync object %p from meta %p to %p", src->data, src, dest);
/* Setting a sync point here relies on GstBuffer copying
* metas after data */
gst_gl_sync_meta_set_sync_point (src, src->context);
}
static void
_default_free_gl (GstGLSyncMeta * sync_meta, GstGLContext * context)
{
const GstGLFuncs *gl = context->gl_vtable;
if (sync_meta->data) {
GST_LOG ("deleting sync object %p", sync_meta->data);
gl->DeleteSync ((GLsync) sync_meta->data);
sync_meta->data = NULL;
}
}
/**
* gst_buffer_add_gl_sync_meta_full:
* @context: a #GstGLContext
* @buffer: a #GstBuffer
* @data: sync data to hold
*
* Returns: (transfer none): the #GstGLSyncMeta added to #GstBuffer
*
* Since: 1.8
*/
GstGLSyncMeta *
gst_buffer_add_gl_sync_meta_full (GstGLContext * context, GstBuffer * buffer,
gpointer data)
{
GstGLSyncMeta *meta;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
meta =
(GstGLSyncMeta *) gst_buffer_add_meta ((buffer), GST_GL_SYNC_META_INFO,
NULL);
if (!meta)
return NULL;
meta->context = gst_object_ref (context);
meta->data = data;
return meta;
}
/**
* gst_buffer_add_gl_sync_meta:
* @context: a #GstGLContext
* @buffer: a #GstBuffer
*
* Returns: (transfer none): the #GstGLSyncMeta added to #GstBuffer
*
* Since: 1.6
*/
GstGLSyncMeta *
gst_buffer_add_gl_sync_meta (GstGLContext * context, GstBuffer * buffer)
{
GstGLSyncMeta *ret = gst_buffer_add_gl_sync_meta_full (context, buffer, NULL);
if (!ret)
return NULL;
ret->set_sync_gl = _default_set_sync_gl;
ret->wait_gl = _default_wait_gl;
ret->wait_cpu_gl = _default_wait_cpu_gl;
ret->copy = _default_copy;
ret->free_gl = _default_free_gl;
return ret;
}
static void
_set_sync_point (GstGLContext * context, GstGLSyncMeta * sync_meta)
{
g_assert (sync_meta->set_sync_gl != NULL);
GST_LOG ("setting sync point %p", sync_meta);
sync_meta->set_sync_gl (sync_meta, context);
}
/**
* gst_gl_sync_meta_set_sync_point:
* @sync_meta: a #GstGLSyncMeta
* @context: a #GstGLContext
*
* Set a sync point to possibly wait on at a later time.
*
* Since: 1.6
*/
void
gst_gl_sync_meta_set_sync_point (GstGLSyncMeta * sync_meta,
GstGLContext * context)
{
if (sync_meta->set_sync)
sync_meta->set_sync (sync_meta, context);
else
gst_gl_context_thread_add (context,
(GstGLContextThreadFunc) _set_sync_point, sync_meta);
}
static void
_wait (GstGLContext * context, GstGLSyncMeta * sync_meta)
{
g_assert (sync_meta->wait_gl != NULL);
GST_LOG ("waiting %p", sync_meta);
sync_meta->wait_gl (sync_meta, context);
}
/**
* gst_gl_sync_meta_wait:
* @sync_meta: a #GstGLSyncMeta
* @context: a #GstGLContext
*
* Insert a wait into @context's command stream ensuring all previous OpenGL
* commands before @sync_meta have completed.
*
* Since: 1.6
*/
void
gst_gl_sync_meta_wait (GstGLSyncMeta * sync_meta, GstGLContext * context)
{
if (sync_meta->wait)
sync_meta->wait (sync_meta, context);
else
gst_gl_context_thread_add (context,
(GstGLContextThreadFunc) _wait, sync_meta);
}
static void
_wait_cpu (GstGLContext * context, GstGLSyncMeta * sync_meta)
{
g_assert (sync_meta->wait_cpu_gl != NULL);
GST_LOG ("waiting %p", sync_meta);
sync_meta->wait_cpu_gl (sync_meta, context);
}
/**
* gst_gl_sync_meta_wait_cpu:
* @sync_meta: a #GstGLSyncMeta
* @context: a #GstGLContext
*
* Perform a wait so that the sync point has passed from the CPU's perspective
* What that means, is that all GL operations changing CPU-visible data before
* the sync point are now visible.
*
* Since: 1.8
*/
void
gst_gl_sync_meta_wait_cpu (GstGLSyncMeta * sync_meta, GstGLContext * context)
{
if (sync_meta->wait_cpu)
sync_meta->wait_cpu (sync_meta, context);
else
gst_gl_context_thread_add (context,
(GstGLContextThreadFunc) _wait_cpu, sync_meta);
}
static gboolean
_gst_gl_sync_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GstGLSyncMeta *dmeta, *smeta;
smeta = (GstGLSyncMeta *) meta;
if (GST_META_TRANSFORM_IS_COPY (type)) {
GstMetaTransformCopy *copy = data;
g_assert (smeta->copy != NULL);
if (!copy->region) {
/* only copy if the complete data is copied as well */
dmeta = gst_buffer_add_gl_sync_meta_full (smeta->context, dest, NULL);
if (!dmeta)
return FALSE;
dmeta->set_sync = smeta->set_sync;
dmeta->set_sync_gl = smeta->set_sync_gl;
dmeta->wait = smeta->wait;
dmeta->wait_gl = smeta->wait_gl;
dmeta->wait_cpu = smeta->wait_cpu;
dmeta->wait_cpu_gl = smeta->wait_cpu_gl;
dmeta->copy = smeta->copy;
dmeta->free = smeta->free;
dmeta->free_gl = smeta->free_gl;
GST_LOG ("copying sync meta %p into %p", smeta, dmeta);
smeta->copy (smeta, buffer, dmeta, dest);
}
} else {
/* return FALSE, if transform type is not supported */
return FALSE;
}
return TRUE;
}
static void
_free_gl_sync_meta (GstGLContext * context, GstGLSyncMeta * sync_meta)
{
g_assert (sync_meta->free_gl != NULL);
GST_LOG ("free sync meta %p", sync_meta);
sync_meta->free_gl (sync_meta, context);
}
static void
_gst_gl_sync_meta_free (GstGLSyncMeta * sync_meta, GstBuffer * buffer)
{
if (sync_meta->free)
sync_meta->free (sync_meta, sync_meta->context);
else
gst_gl_context_thread_add (sync_meta->context,
(GstGLContextThreadFunc) _free_gl_sync_meta, sync_meta);
gst_object_unref (sync_meta->context);
}
static gboolean
_gst_gl_sync_meta_init (GstGLSyncMeta * sync_meta, gpointer params,
GstBuffer * buffer)
{
static volatile gsize _init;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (gst_gl_sync_meta_debug, "glsyncmeta", 0,
"glsyncmeta");
g_once_init_leave (&_init, 1);
}
sync_meta->context = NULL;
sync_meta->data = NULL;
sync_meta->set_sync = NULL;
sync_meta->set_sync_gl = NULL;
sync_meta->wait = NULL;
sync_meta->wait_gl = NULL;
sync_meta->wait_cpu = NULL;
sync_meta->wait_cpu_gl = NULL;
sync_meta->copy = NULL;
sync_meta->free = NULL;
sync_meta->free_gl = NULL;
return TRUE;
}
GType
gst_gl_sync_meta_api_get_type (void)
{
static volatile GType type = 0;
static const gchar *tags[] = { NULL };
if (g_once_init_enter (&type)) {
GType _type = gst_meta_api_type_register ("GstGLSyncMetaAPI", tags);
g_once_init_leave (&type, _type);
}
return type;
}
const GstMetaInfo *
gst_gl_sync_meta_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (g_once_init_enter (&meta_info)) {
const GstMetaInfo *meta =
gst_meta_register (GST_GL_SYNC_META_API_TYPE, "GstGLSyncMeta",
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sizeof (GstGLSyncMeta), (GstMetaInitFunction) _gst_gl_sync_meta_init,
(GstMetaFreeFunction) _gst_gl_sync_meta_free,
_gst_gl_sync_meta_transform);
g_once_init_leave (&meta_info, meta);
}
return meta_info;
}