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

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/*
* GStreamer
* Copyright (C) 2016 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:gstglquery
* @short_description: OpenGL query abstraction
* @title: GstGLQuery
* @see_also:
*
* A #GstGLQuery represents and holds an OpenGL query object. Various types of
* queries can be run or counters retrieved.
*
* Since: 1.10
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstglquery.h"
#include "gstglcontext.h"
#include "gstglfuncs.h"
#ifndef GL_TIME_ELAPSED
#define GL_TIME_ELAPSED 0x88BF
#endif
#ifndef GL_TIMESTAMP
#define GL_TIMESTAMP 0x8E28
#endif
#ifndef GL_QUERY_RESULT
#define GL_QUERY_RESULT 0x8866
#endif
#define GST_CAT_DEFAULT gst_gl_query_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static void
_init_debug (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glquery", 0, "glquery element");
g_once_init_leave (&_init, 1);
}
}
static const gchar *
_query_type_to_string (guint query_type)
{
switch (query_type) {
case GST_GL_QUERY_TIME_ELAPSED:
case GL_TIME_ELAPSED:
return "time elapsed";
case GL_TIMESTAMP:
case GST_GL_QUERY_TIMESTAMP:
return "timestamp";
default:
return "unknown";
}
}
static guint
_gst_gl_query_type_to_gl (GstGLQueryType query_type)
{
if (query_type == GST_GL_QUERY_TIME_ELAPSED)
return GL_TIME_ELAPSED;
if (query_type == GST_GL_QUERY_TIMESTAMP)
return GL_TIMESTAMP;
return 0;
}
static gboolean
_query_type_supports_counter (guint gl_query_type)
{
return gl_query_type == GL_TIMESTAMP;
}
static gboolean
_query_type_supports_begin_end (guint gl_query_type)
{
return gl_query_type == GL_TIME_ELAPSED;
}
static gboolean
_context_supports_query_type (GstGLContext * context, guint gl_query_type)
{
return gl_query_type != 0 && context->gl_vtable->GenQueries != NULL;
}
static gchar *
_log_time (gpointer user_data)
{
GstGLQuery *query = user_data;
gint64 result;
result = gst_gl_query_result (query);
return gst_info_strdup_printf ("%" GST_TIME_FORMAT, GST_TIME_ARGS (result));
}
/**
* gst_gl_query_init:
* @query: a #GstGLQuery
* @context: a #GstGLContext
* @query_type: the #GstGLQueryType
*
* Since: 1.10
*/
void
gst_gl_query_init (GstGLQuery * query, GstGLContext * context,
GstGLQueryType query_type)
{
const GstGLFuncs *gl;
GLenum gl_query_type;
g_return_if_fail (query != NULL);
g_return_if_fail (GST_IS_GL_CONTEXT (context));
gl = context->gl_vtable;
gl_query_type = _gst_gl_query_type_to_gl (query_type);
g_return_if_fail (gl_query_type != GL_NONE);
memset (query, 0, sizeof (*query));
_init_debug ();
query->query_type = gl_query_type;
query->context = gst_object_ref (context);
query->supported = _context_supports_query_type (context, query->query_type);
if (query->supported)
gl->GenQueries (1, &query->query_id);
gst_gl_async_debug_init (&query->debug);
query->debug.callback = _log_time;
query->debug.user_data = query;
}
/**
* gst_gl_query_unset:
* @query: a #GstGLQuery
*
* Free any dynamically allocated resources
*
* Since: 1.10
*/
void
gst_gl_query_unset (GstGLQuery * query)
{
const GstGLFuncs *gl;
g_return_if_fail (query != NULL);
if (query->start_called)
g_critical ("Unsetting a running query. This may not be what you wanted."
"Be sure to pair calls to gst_gl_query_start() and gst_gl_query_end()");
GST_TRACE ("%p unsetting query %u", query, query->query_id);
gl = query->context->gl_vtable;
/* unset the debug object as it may callback to print the last message */
gst_gl_async_debug_unset (&query->debug);
if (query->query_id)
gl->DeleteQueries (1, &query->query_id);
gst_object_unref (query->context);
}
/**
* gst_gl_query_new: (skip)
* @context: a #GstGLContext
* @query_type: the #GstGLQueryType to create
*
* Free with gst_gl_query_free()
*
* Returns: a new #GstGLQuery
*
* Since: 1.10
*/
GstGLQuery *
gst_gl_query_new (GstGLContext * context, GstGLQueryType query_type)
{
GstGLQuery *query = g_new0 (GstGLQuery, 1);
gst_gl_query_init (query, context, query_type);
return query;
}
/**
* gst_gl_query_free:
* @query: a #GstGLQuery
*
* Frees a #GstGLQuery
*
* Since: 1.10
*/
void
gst_gl_query_free (GstGLQuery * query)
{
g_return_if_fail (query != NULL);
gst_gl_query_unset (query);
g_free (query);
}
/**
* gst_gl_query_start:
* @query: a #GstGLQuery
*
* Start counting the query
*
* Since: 1.10
*/
void
gst_gl_query_start (GstGLQuery * query)
{
const GstGLFuncs *gl;
g_return_if_fail (query != NULL);
g_return_if_fail (_query_type_supports_begin_end (query->query_type));
g_return_if_fail (query->start_called == FALSE);
query->start_called = TRUE;
if (!query->supported)
return;
gst_gl_async_debug_output_log_msg (&query->debug);
GST_TRACE ("%p start query type \'%s\' id %u", query,
_query_type_to_string (query->query_type), query->query_id);
gl = query->context->gl_vtable;
gl->BeginQuery (query->query_type, query->query_id);
}
/**
* gst_gl_query_end:
* @query: a #GstGLQuery
*
* End counting the query
*
* Since: 1.10
*/
void
gst_gl_query_end (GstGLQuery * query)
{
const GstGLFuncs *gl;
g_return_if_fail (query != NULL);
g_return_if_fail (_query_type_supports_begin_end (query->query_type));
g_return_if_fail (query->start_called);
query->start_called = FALSE;
if (!query->supported)
return;
GST_TRACE ("%p end query type \'%s\' id %u", query,
_query_type_to_string (query->query_type), query->query_id);
gl = query->context->gl_vtable;
gl->EndQuery (query->query_type);
}
/**
* gst_gl_query_counter:
* @query: a #GstGLQuery
*
* Record the result of a counter
*
* Since: 1.10
*/
void
gst_gl_query_counter (GstGLQuery * query)
{
const GstGLFuncs *gl;
g_return_if_fail (query != NULL);
g_return_if_fail (_query_type_supports_counter (query->query_type));
if (!query->supported)
return;
GST_TRACE ("%p query counter type \'%s\' id %u", query,
_query_type_to_string (query->query_type), query->query_id);
gst_gl_async_debug_output_log_msg (&query->debug);
gl = query->context->gl_vtable;
gl->QueryCounter (query->query_id, query->query_type);
}
/**
* gst_gl_query_result:
* @query: a #GstGLQuery
*
* Returns: the result of the query
*
* Since: 1.10
*/
guint64
gst_gl_query_result (GstGLQuery * query)
{
const GstGLFuncs *gl;
guint64 ret;
g_return_val_if_fail (query != NULL, 0);
g_return_val_if_fail (!query->start_called, 0);
if (!query->supported)
return 0;
gl = query->context->gl_vtable;
if (gl->GetQueryObjectui64v) {
gl->GetQueryObjectui64v (query->query_id, GL_QUERY_RESULT,
(GLuint64 *) & ret);
} else {
guint tmp;
gl->GetQueryObjectuiv (query->query_id, GL_QUERY_RESULT, &tmp);
ret = tmp;
}
GST_TRACE ("%p get result %" G_GUINT64_FORMAT " type \'%s\' id %u", query,
ret, _query_type_to_string (query->query_type), query->query_id);
return ret;
}