gstreamer/ext/gl/gstgltestsrc.c
Matthew Waters 2a4a3aa0d6 gltestsrc: NULL out the functions used
Fixes segfault when the display changes
2020-02-05 15:32:14 +11:00

304 lines
9.3 KiB
C

/*
* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2002,2007 David A. Schleef <ds@schleef.org>
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* 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.
*/
/**
* SECTION:element-gltestsrc
* @title: gltestsrc
*
* The gltestsrc element is used to produce test video texture.
* The video test produced can be controlled with the "pattern"
* property.
*
* ## Example launch line
*
* |[
* gst-launch-1.0 -v gltestsrc pattern=smpte ! glimagesink
* ]|
* Shows original SMPTE color bars in a window.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gl/gstglfuncs.h>
#include <gst/gst-i18n-plugin.h>
#include "gstgltestsrc.h"
#include "gltestsrc.h"
GST_DEBUG_CATEGORY_STATIC (gl_test_src_debug);
#define GST_CAT_DEFAULT gl_test_src_debug
enum
{
PROP_0,
PROP_PATTERN,
PROP_IS_LIVE
/* FILL ME */
};
/* *INDENT-OFF* */
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
"format = (string) RGBA, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", "
"framerate = " GST_VIDEO_FPS_RANGE ","
"texture-target = (string) 2D")
);
/* *INDENT-ON* */
#define gst_gl_test_src_parent_class parent_class
G_DEFINE_TYPE (GstGLTestSrc, gst_gl_test_src, GST_TYPE_GL_BASE_SRC);
static void gst_gl_test_src_set_pattern (GstGLTestSrc * gltestsrc,
int pattern_type);
static void gst_gl_test_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_test_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstCaps *gst_gl_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps);
static gboolean gst_gl_test_src_is_seekable (GstBaseSrc * psrc);
static gboolean gst_gl_test_src_callback (gpointer stuff);
static gboolean gst_gl_test_src_gl_start (GstGLBaseSrc * src);
static void gst_gl_test_src_gl_stop (GstGLBaseSrc * src);
static gboolean gst_gl_test_src_fill_memory (GstGLBaseSrc * src,
GstGLMemory * memory);
#define GST_TYPE_GL_TEST_SRC_PATTERN (gst_gl_test_src_pattern_get_type ())
static GType
gst_gl_test_src_pattern_get_type (void)
{
static GType gl_test_src_pattern_type = 0;
static const GEnumValue pattern_types[] = {
{GST_GL_TEST_SRC_SMPTE, "SMPTE 100% color bars", "smpte"},
{GST_GL_TEST_SRC_SNOW, "Random (television snow)", "snow"},
{GST_GL_TEST_SRC_BLACK, "100% Black", "black"},
{GST_GL_TEST_SRC_WHITE, "100% White", "white"},
{GST_GL_TEST_SRC_RED, "Red", "red"},
{GST_GL_TEST_SRC_GREEN, "Green", "green"},
{GST_GL_TEST_SRC_BLUE, "Blue", "blue"},
{GST_GL_TEST_SRC_CHECKERS1, "Checkers 1px", "checkers-1"},
{GST_GL_TEST_SRC_CHECKERS2, "Checkers 2px", "checkers-2"},
{GST_GL_TEST_SRC_CHECKERS4, "Checkers 4px", "checkers-4"},
{GST_GL_TEST_SRC_CHECKERS8, "Checkers 8px", "checkers-8"},
{GST_GL_TEST_SRC_CIRCULAR, "Circular", "circular"},
{GST_GL_TEST_SRC_BLINK, "Blink", "blink"},
{GST_GL_TEST_SRC_MANDELBROT, "Mandelbrot Fractal", "mandelbrot"},
{0, NULL, NULL}
};
if (!gl_test_src_pattern_type) {
gl_test_src_pattern_type =
g_enum_register_static ("GstGLTestSrcPattern", pattern_types);
}
return gl_test_src_pattern_type;
}
static void
gst_gl_test_src_class_init (GstGLTestSrcClass * klass)
{
GObjectClass *gobject_class;
GstBaseSrcClass *gstbasesrc_class;
GstGLBaseSrcClass *gstglbasesrc_class;
GstElementClass *element_class;
GST_DEBUG_CATEGORY_INIT (gl_test_src_debug, "gltestsrc", 0,
"Video Test Source");
gobject_class = G_OBJECT_CLASS (klass);
gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
gstglbasesrc_class = GST_GL_BASE_SRC_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_gl_test_src_set_property;
gobject_class->get_property = gst_gl_test_src_get_property;
g_object_class_install_property (gobject_class, PROP_PATTERN,
g_param_spec_enum ("pattern", "Pattern",
"Type of test pattern to generate", GST_TYPE_GL_TEST_SRC_PATTERN,
GST_GL_TEST_SRC_SMPTE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_IS_LIVE,
g_param_spec_boolean ("is-live", "Is Live",
"Whether to act as a live source", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class, "Video test source",
"Source/Video", "Creates a test video stream",
"David A. Schleef <ds@schleef.org>");
gst_element_class_add_static_pad_template (element_class, &src_factory);
gstbasesrc_class->is_seekable = gst_gl_test_src_is_seekable;
gstbasesrc_class->fixate = gst_gl_test_src_fixate;
gstglbasesrc_class->supported_gl_api =
GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2;
gstglbasesrc_class->gl_start = gst_gl_test_src_gl_start;
gstglbasesrc_class->gl_stop = gst_gl_test_src_gl_stop;
gstglbasesrc_class->fill_gl_memory = gst_gl_test_src_fill_memory;
}
static void
gst_gl_test_src_init (GstGLTestSrc * src)
{
gst_gl_test_src_set_pattern (src, GST_GL_TEST_SRC_SMPTE);
}
static GstCaps *
gst_gl_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
GST_DEBUG ("fixate");
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
return caps;
}
static void
gst_gl_test_src_set_pattern (GstGLTestSrc * gltestsrc, gint pattern_type)
{
gltestsrc->set_pattern = pattern_type;
}
static void
gst_gl_test_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (object);
switch (prop_id) {
case PROP_PATTERN:
gst_gl_test_src_set_pattern (src, g_value_get_enum (value));
break;
case PROP_IS_LIVE:
gst_base_src_set_live (GST_BASE_SRC (src), g_value_get_boolean (value));
break;
default:
break;
}
}
static void
gst_gl_test_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (object);
switch (prop_id) {
case PROP_PATTERN:
g_value_set_enum (value, src->set_pattern);
break;
case PROP_IS_LIVE:
g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (src)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gl_test_src_is_seekable (GstBaseSrc * psrc)
{
/* we're seekable... */
return TRUE;
}
static gboolean
gst_gl_test_src_callback (gpointer stuff)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (stuff);
GstGLBaseSrc *glbasesrc = GST_GL_BASE_SRC (src);
const struct SrcFuncs *funcs;
funcs = src->src_funcs;
if (!funcs || src->set_pattern != src->active_pattern) {
if (src->src_impl && funcs)
funcs->free (src->src_impl);
src->src_funcs = funcs =
gst_gl_test_src_get_src_funcs_for_pattern (src->set_pattern);
if (funcs == NULL) {
GST_ERROR_OBJECT (src, "Could not find an implementation of the "
"requested pattern");
return FALSE;
}
src->src_impl = funcs->new (src);
if (!funcs->init (src->src_impl, glbasesrc->context, &glbasesrc->out_info)) {
GST_ERROR_OBJECT (src, "Failed to initialize pattern");
return FALSE;
}
src->active_pattern = src->set_pattern;
}
return funcs->fill_bound_fbo (src->src_impl);
}
static gboolean
gst_gl_test_src_fill_memory (GstGLBaseSrc * src, GstGLMemory * memory)
{
GstGLTestSrc *test_src = GST_GL_TEST_SRC (src);
return gst_gl_framebuffer_draw_to_texture (test_src->fbo, memory,
gst_gl_test_src_callback, test_src);
}
static gboolean
gst_gl_test_src_gl_start (GstGLBaseSrc * bsrc)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (bsrc);
src->fbo = gst_gl_framebuffer_new_with_default_depth (bsrc->context,
GST_VIDEO_INFO_WIDTH (&bsrc->out_info),
GST_VIDEO_INFO_HEIGHT (&bsrc->out_info));
return TRUE;
}
static void
gst_gl_test_src_gl_stop (GstGLBaseSrc * bsrc)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (bsrc);
if (src->fbo)
gst_object_unref (src->fbo);
src->fbo = NULL;
if (src->src_impl)
src->src_funcs->free (src->src_impl);
src->src_impl = NULL;
src->src_funcs = NULL;
}