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gstreamer/gst-libs/gst/gl/gstglutils.c
Matthew Waters 27e4288de4 glutils: remove unused functions for texture creation/deletion 
Everyone uses GstGLMemory now and any future code should as well.
2016-06-15 16:08:57 +10:00

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/*
* GStreamer
* Copyright (C) 2013 Matthew Waters <ystreet00@gmail.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 <stdio.h>
#include <gst/gst.h>
#include <glib/gprintf.h>
#include "gl.h"
#include "gstglutils.h"
#if GST_GL_HAVE_WINDOW_X11
#include <gst/gl/x11/gstgldisplay_x11.h>
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
#include <gst/gl/wayland/gstgldisplay_wayland.h>
#endif
#ifndef GL_FRAMEBUFFER_UNDEFINED
#define GL_FRAMEBUFFER_UNDEFINED 0x8219
#endif
#ifndef GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT
#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT 0x8CD6
#endif
#ifndef GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT
#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT 0x8CD7
#endif
#ifndef GL_FRAMEBUFFER_UNSUPPORTED
#define GL_FRAMEBUFFER_UNSUPPORTED 0x8CDD
#endif
#ifndef GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS
#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS 0x8CD9
#endif
#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))
static gchar *error_message;
/* called in the gl thread */
gboolean
gst_gl_context_check_framebuffer_status (GstGLContext * context)
{
GLenum status = 0;
status = context->gl_vtable->CheckFramebufferStatus (GL_FRAMEBUFFER);
switch (status) {
case GL_FRAMEBUFFER_COMPLETE:
return TRUE;
break;
case GL_FRAMEBUFFER_UNSUPPORTED:
GST_ERROR ("GL_FRAMEBUFFER_UNSUPPORTED");
break;
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
GST_ERROR ("GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
GST_ERROR ("GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");
break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
GST_ERROR ("GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS");
break;
#if GST_GL_HAVE_OPENGL
case GL_FRAMEBUFFER_UNDEFINED:
GST_ERROR ("GL_FRAMEBUFFER_UNDEFINED");
break;
#endif
default:
GST_ERROR ("General FBO error");
}
return FALSE;
}
typedef struct _GenFBO
{
GstGLFramebuffer *frame;
gint width, height;
GLuint *fbo, *depth;
} GenFBO;
static void
_gen_fbo (GstGLContext * context, GenFBO * data)
{
gst_gl_framebuffer_generate (data->frame, data->width, data->height,
data->fbo, data->depth);
}
gboolean
gst_gl_context_gen_fbo (GstGLContext * context, gint width, gint height,
GLuint * fbo, GLuint * depthbuffer)
{
GstGLFramebuffer *frame = gst_gl_framebuffer_new (context);
GenFBO data = { frame, width, height, fbo, depthbuffer };
gst_gl_context_thread_add (context, (GstGLContextThreadFunc) _gen_fbo, &data);
gst_object_unref (frame);
return TRUE;
}
typedef struct _UseFBO2
{
GstGLFramebuffer *frame;
gint texture_fbo_width;
gint texture_fbo_height;
GLuint fbo;
GLuint depth_buffer;
GLuint texture_fbo;
GLCB_V2 cb;
gpointer stuff;
} UseFBO2;
static void
_use_fbo_v2 (GstGLContext * context, UseFBO2 * data)
{
gst_gl_framebuffer_use_v2 (data->frame, data->texture_fbo_width,
data->texture_fbo_height, data->fbo, data->depth_buffer,
data->texture_fbo, data->cb, data->stuff);
}
gboolean
gst_gl_context_use_fbo_v2 (GstGLContext * context, gint texture_fbo_width,
gint texture_fbo_height, GLuint fbo, GLuint depth_buffer,
GLuint texture_fbo, GLCB_V2 cb, gpointer stuff)
{
GstGLFramebuffer *frame = gst_gl_framebuffer_new (context);
UseFBO2 data =
{ frame, texture_fbo_width, texture_fbo_height, fbo, depth_buffer,
texture_fbo, cb, stuff
};
gst_gl_context_thread_add (context, (GstGLContextThreadFunc) _use_fbo_v2,
&data);
gst_object_unref (frame);
return TRUE;
}
typedef struct _DelFBO
{
GstGLFramebuffer *frame;
GLuint fbo;
GLuint depth;
} DelFBO;
/* Called in the gl thread */
static void
_del_fbo (GstGLContext * context, DelFBO * data)
{
gst_gl_framebuffer_delete (data->frame, data->fbo, data->depth);
}
/* Called by gltestsrc and glfilter */
void
gst_gl_context_del_fbo (GstGLContext * context, GLuint fbo, GLuint depth_buffer)
{
GstGLFramebuffer *frame = gst_gl_framebuffer_new (context);
DelFBO data = { frame, fbo, depth_buffer };
gst_gl_context_thread_add (context, (GstGLContextThreadFunc) _del_fbo, &data);
gst_object_unref (frame);
}
struct _compile_shader
{
GstGLShader **shader;
const gchar *vertex_src;
const gchar *fragment_src;
};
static void
_compile_shader (GstGLContext * context, struct _compile_shader *data)
{
GstGLShader *shader;
GstGLSLStage *vert, *frag;
GError *error = NULL;
shader = gst_gl_shader_new (context);
if (data->vertex_src) {
vert = gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY, data->vertex_src);
if (!gst_glsl_stage_compile (vert, &error)) {
GST_ERROR_OBJECT (vert, "%s", error->message);
gst_object_unref (vert);
gst_object_unref (shader);
return;
}
if (!gst_gl_shader_attach (shader, vert)) {
gst_object_unref (shader);
return;
}
}
if (data->fragment_src) {
frag = gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
data->fragment_src);
if (!gst_glsl_stage_compile (frag, &error)) {
GST_ERROR_OBJECT (frag, "%s", error->message);
gst_object_unref (frag);
gst_object_unref (shader);
return;
}
if (!gst_gl_shader_attach (shader, frag)) {
gst_object_unref (shader);
return;
}
}
if (!gst_gl_shader_link (shader, &error)) {
GST_ERROR_OBJECT (shader, "%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_context_clear_shader (context);
gst_object_unref (shader);
return;
}
*data->shader = shader;
}
/* Called by glfilter */
gboolean
gst_gl_context_gen_shader (GstGLContext * context, const gchar * vert_src,
const gchar * frag_src, GstGLShader ** shader)
{
struct _compile_shader data;
g_return_val_if_fail (frag_src != NULL || vert_src != NULL, FALSE);
g_return_val_if_fail (shader != NULL, FALSE);
data.shader = shader;
data.vertex_src = vert_src;
data.fragment_src = frag_src;
gst_gl_context_thread_add (context, (GstGLContextThreadFunc) _compile_shader,
&data);
return *shader != NULL;
}
void
gst_gl_context_set_error (GstGLContext * context, const char *format, ...)
{
va_list args;
g_free (error_message);
va_start (args, format);
error_message = g_strdup_vprintf (format, args);
va_end (args);
GST_WARNING ("%s", error_message);
}
gchar *
gst_gl_context_get_error (void)
{
return error_message;
}
/* Called by glfilter */
void
gst_gl_context_del_shader (GstGLContext * context, GstGLShader * shader)
{
gst_object_unref (shader);
}
static gboolean
gst_gl_display_found (GstElement * element, GstGLDisplay * display)
{
if (display) {
GST_LOG_OBJECT (element, "already have a display (%p)", display);
return TRUE;
}
return FALSE;
}
GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
static void
_init_context_debug (void)
{
#ifndef GST_DISABLE_GST_DEBUG
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT");
g_once_init_leave (&_init, 1);
}
#endif
}
static gboolean
pad_query (const GValue * item, GValue * value, gpointer user_data)
{
GstPad *pad = g_value_get_object (item);
GstQuery *query = user_data;
gboolean res;
_init_context_debug ();
res = gst_pad_peer_query (pad, query);
if (res) {
g_value_set_boolean (value, TRUE);
return FALSE;
}
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, pad, "pad peer query failed");
return TRUE;
}
gboolean
gst_gl_run_query (GstElement * element, GstQuery * query,
GstPadDirection direction)
{
GstIterator *it;
GstIteratorFoldFunction func = pad_query;
GValue res = { 0 };
g_value_init (&res, G_TYPE_BOOLEAN);
g_value_set_boolean (&res, FALSE);
/* Ask neighbor */
if (direction == GST_PAD_SRC)
it = gst_element_iterate_src_pads (element);
else
it = gst_element_iterate_sink_pads (element);
while (gst_iterator_fold (it, func, &res, query) == GST_ITERATOR_RESYNC)
gst_iterator_resync (it);
gst_iterator_free (it);
return g_value_get_boolean (&res);
}
static void
_gst_context_query (GstElement * element, const gchar * display_type)
{
GstQuery *query;
GstContext *ctxt;
_init_context_debug ();
/* 2a) Query downstream with GST_QUERY_CONTEXT for the context and
* check if downstream already has a context of the specific type
* 2b) Query upstream as above.
*/
query = gst_query_new_context (display_type);
if (gst_gl_run_query (element, query, GST_PAD_SRC)) {
gst_query_parse_context (query, &ctxt);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"found context (%p) in downstream query", ctxt);
gst_element_set_context (element, ctxt);
} else if (gst_gl_run_query (element, query, GST_PAD_SINK)) {
gst_query_parse_context (query, &ctxt);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"found context (%p) in upstream query", ctxt);
gst_element_set_context (element, ctxt);
} else {
/* 3) Post a GST_MESSAGE_NEED_CONTEXT message on the bus with
* the required context type and afterwards check if a
* usable context was set now as in 1). The message could
* be handled by the parent bins of the element and the
* application.
*/
GstMessage *msg;
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"posting need context message");
msg = gst_message_new_need_context (GST_OBJECT_CAST (element),
display_type);
gst_element_post_message (element, msg);
}
/*
* Whomever responds to the need-context message performs a
* GstElement::set_context() with the required context in which the element
* is required to update the display_ptr or call gst_gl_handle_set_context().
*/
gst_query_unref (query);
}
static void
gst_gl_display_context_query (GstElement * element, GstGLDisplay ** display_ptr)
{
_gst_context_query (element, GST_GL_DISPLAY_CONTEXT_TYPE);
if (*display_ptr)
return;
#if GST_GL_HAVE_WINDOW_X11
_gst_context_query (element, "gst.x11.display.handle");
if (*display_ptr)
return;
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
_gst_context_query (element, "GstWaylandDisplayHandleContextType");
if (*display_ptr)
return;
#endif
}
static void
gst_gl_context_query (GstElement * element)
{
_gst_context_query (element, "gst.gl.app_context");
}
/* 4) Create a context by itself and post a GST_MESSAGE_HAVE_CONTEXT
* message.
*/
static void
gst_gl_display_context_propagate (GstElement * element, GstGLDisplay * display)
{
GstContext *context;
GstMessage *msg;
if (!display) {
GST_ERROR_OBJECT (element, "Could not get GL display connection");
return;
}
_init_context_debug ();
context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
gst_context_set_gl_display (context, display);
gst_element_set_context (element, context);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"posting have context (%p) message with display (%p)", context, display);
msg = gst_message_new_have_context (GST_OBJECT_CAST (element), context);
gst_element_post_message (GST_ELEMENT_CAST (element), msg);
}
gboolean
gst_gl_ensure_element_data (gpointer element, GstGLDisplay ** display_ptr,
GstGLContext ** context_ptr)
{
GstGLDisplay *display;
g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (display_ptr != NULL, FALSE);
g_return_val_if_fail (context_ptr != NULL, FALSE);
/* 1) Check if the element already has a context of the specific
* type.
*/
display = *display_ptr;
if (gst_gl_display_found (element, display))
goto done;
gst_gl_display_context_query (element, display_ptr);
/* Neighbour found and it updated the display */
if (gst_gl_display_found (element, *display_ptr))
goto get_gl_context;
/* If no neighboor, or application not interested, use system default */
display = gst_gl_display_new ();
*display_ptr = display;
gst_gl_display_context_propagate (element, display);
get_gl_context:
if (*context_ptr)
goto done;
gst_gl_context_query (element);
done:
return *display_ptr != NULL;
}
gboolean
gst_gl_handle_set_context (GstElement * element, GstContext * context,
GstGLDisplay ** display, GstGLContext ** other_context)
{
GstGLDisplay *display_replacement = NULL;
GstGLContext *context_replacement = NULL;
const gchar *context_type;
g_return_val_if_fail (display != NULL, FALSE);
g_return_val_if_fail (other_context != NULL, FALSE);
if (!context)
return FALSE;
context_type = gst_context_get_context_type (context);
if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
if (!gst_context_get_gl_display (context, &display_replacement)) {
GST_WARNING_OBJECT (element, "Failed to get display from context");
return FALSE;
}
}
#if GST_GL_HAVE_WINDOW_X11
else if (g_strcmp0 (context_type, "gst.x11.display.handle") == 0) {
const GstStructure *s;
Display *display;
s = gst_context_get_structure (context);
if (gst_structure_get (s, "display", G_TYPE_POINTER, &display, NULL))
display_replacement =
(GstGLDisplay *) gst_gl_display_x11_new_with_display (display);
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
else if (g_strcmp0 (context_type, "GstWaylandDisplayHandleContextType") == 0) {
const GstStructure *s;
struct wl_display *display;
s = gst_context_get_structure (context);
if (gst_structure_get (s, "display", G_TYPE_POINTER, &display, NULL))
display_replacement =
(GstGLDisplay *) gst_gl_display_wayland_new_with_display (display);
}
#endif
else if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) {
const GstStructure *s = gst_context_get_structure (context);
GstGLDisplay *context_display;
GstGLDisplay *element_display;
if (gst_structure_get (s, "context", GST_GL_TYPE_CONTEXT,
&context_replacement, NULL)) {
context_display = gst_gl_context_get_display (context_replacement);
element_display = display_replacement ? display_replacement : *display;
if (element_display
&& (gst_gl_display_get_handle_type (element_display) &
gst_gl_display_get_handle_type (context_display)) == 0) {
GST_ELEMENT_WARNING (element, LIBRARY, SETTINGS, ("%s",
"Cannot set a GL context with a different display type"), ("%s",
"Cannot set a GL context with a different display type"));
gst_object_unref (context_replacement);
context_replacement = NULL;
}
gst_object_unref (context_display);
}
}
if (display_replacement) {
GstGLDisplay *old = *display;
*display = display_replacement;
if (old)
gst_object_unref (old);
}
if (context_replacement) {
GstGLContext *old = *other_context;
*other_context = context_replacement;
if (old)
gst_object_unref (old);
}
return TRUE;
}
gboolean
gst_gl_handle_context_query (GstElement * element, GstQuery * query,
GstGLDisplay ** display, GstGLContext ** other_context)
{
gboolean res = FALSE;
const gchar *context_type;
GstContext *context, *old_context;
g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (query != NULL, FALSE);
g_return_val_if_fail (display != NULL, FALSE);
g_return_val_if_fail (other_context != NULL, FALSE);
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
gst_context_set_gl_display (context, *display);
gst_query_set_context (query, context);
gst_context_unref (context);
res = *display != NULL;
}
#if GST_GL_HAVE_WINDOW_X11
else if (g_strcmp0 (context_type, "gst.x11.display.handle") == 0) {
GstStructure *s;
Display *x11_display = NULL;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.x11.display.handle", TRUE);
if (*display
&& ((*display)->type & GST_GL_DISPLAY_TYPE_X11) ==
GST_GL_DISPLAY_TYPE_X11)
x11_display = (Display *) gst_gl_display_get_handle (*display);
s = gst_context_writable_structure (context);
gst_structure_set (s, "display", G_TYPE_POINTER, x11_display, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
res = x11_display != NULL;
}
#endif
#if GST_GL_HAVE_WINDOW_WAYLAND
else if (g_strcmp0 (context_type, "GstWaylandDisplayHandleContextType") == 0) {
GstStructure *s;
struct wl_display *wayland_display = NULL;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("GstWaylandDisplayHandleContextType", TRUE);
if (*display
&& ((*display)->type & GST_GL_DISPLAY_TYPE_WAYLAND) ==
GST_GL_DISPLAY_TYPE_WAYLAND)
wayland_display =
(struct wl_display *) gst_gl_display_get_handle (*display);
s = gst_context_writable_structure (context);
gst_structure_set (s, "display", G_TYPE_POINTER, wayland_display, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
res = wayland_display != NULL;
}
#endif
else if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.app_context", TRUE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, *other_context, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
res = *other_context != NULL;
}
return res;
}
gsize
gst_gl_get_plane_data_size (GstVideoInfo * info, GstVideoAlignment * align,
guint plane)
{
gint padded_height;
gsize plane_size;
padded_height = info->height;
if (align)
padded_height += align->padding_top + align->padding_bottom;
padded_height =
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (info->finfo, plane, padded_height);
plane_size = GST_VIDEO_INFO_PLANE_STRIDE (info, plane) * padded_height;
return plane_size;
}
/* find the difference between the start of the plane and where the video
* data starts in the plane */
gsize
gst_gl_get_plane_start (GstVideoInfo * info, GstVideoAlignment * valign,
guint plane)
{
gsize plane_start;
gint i;
/* find the start of the plane data including padding */
plane_start = 0;
for (i = 0; i < plane; i++) {
plane_start += gst_gl_get_plane_data_size (info, valign, i);
}
/* offset between the plane data start and where the video frame starts */
return (GST_VIDEO_INFO_PLANE_OFFSET (info, plane)) - plane_start;
}
GstCaps *
gst_gl_caps_replace_all_caps_features (const GstCaps * caps,
const gchar * feature_name)
{
GstCaps *tmp = gst_caps_copy (caps);
guint n = gst_caps_get_size (tmp);
guint i = 0;
for (i = 0; i < n; i++) {
gst_caps_set_features (tmp, i,
gst_caps_features_from_string (feature_name));
}
return tmp;
}
/**
* gst_gl_value_get_texture_target_mask:
* @value: an initialized #GValue of type G_TYPE_STRING
*
* See gst_gl_value_set_texture_target_from_mask() for what entails a mask
*
* Returns: the mask of #GstGLTextureTarget's in @value
*/
GstGLTextureTarget
gst_gl_value_get_texture_target_mask (const GValue * targets)
{
guint new_targets = 0;
g_return_val_if_fail (targets != NULL, GST_GL_TEXTURE_TARGET_NONE);
if (G_TYPE_CHECK_VALUE_TYPE (targets, G_TYPE_STRING)) {
GstGLTextureTarget target;
const gchar *str;
str = g_value_get_string (targets);
target = gst_gl_texture_target_from_string (str);
if (target)
new_targets |= 1 << target;
} else if (G_TYPE_CHECK_VALUE_TYPE (targets, GST_TYPE_LIST)) {
gint j, m;
m = gst_value_list_get_size (targets);
for (j = 0; j < m; j++) {
const GValue *val = gst_value_list_get_value (targets, j);
GstGLTextureTarget target;
const gchar *str;
str = g_value_get_string (val);
target = gst_gl_texture_target_from_string (str);
if (target)
new_targets |= 1 << target;
}
}
return new_targets;
}
/**
* gst_gl_value_set_texture_target:
* @value: an initialized #GValue of type G_TYPE_STRING
* @target: a #GstGLTextureTarget's
*
* Returns: whether the @target could be set on @value
*/
gboolean
gst_gl_value_set_texture_target (GValue * value, GstGLTextureTarget target)
{
g_return_val_if_fail (value != NULL, FALSE);
g_return_val_if_fail (target != GST_GL_TEXTURE_TARGET_NONE, FALSE);
if (target == GST_GL_TEXTURE_TARGET_2D) {
g_value_set_static_string (value, GST_GL_TEXTURE_TARGET_2D_STR);
} else if (target == GST_GL_TEXTURE_TARGET_RECTANGLE) {
g_value_set_static_string (value, GST_GL_TEXTURE_TARGET_RECTANGLE_STR);
} else if (target == GST_GL_TEXTURE_TARGET_EXTERNAL_OES) {
g_value_set_static_string (value, GST_GL_TEXTURE_TARGET_EXTERNAL_OES_STR);
} else {
return FALSE;
}
return TRUE;
}
static guint64
_gst_gl_log2_int64 (guint64 value)
{
guint64 ret = 0;
while (value >>= 1)
ret++;
return ret;
}
/**
* gst_gl_value_set_texture_target_from_mask:
* @value: an uninitialized #GValue
* @target_mask: a bitwise mask of #GstGLTextureTarget's
*
* A mask is a bitwise OR of (1 << target) where target is a valid
* #GstGLTextureTarget
*
* Returns: whether the @target_mask could be set on @value
*/
gboolean
gst_gl_value_set_texture_target_from_mask (GValue * value,
GstGLTextureTarget target_mask)
{
g_return_val_if_fail (value != NULL, FALSE);
g_return_val_if_fail (target_mask != GST_GL_TEXTURE_TARGET_NONE, FALSE);
if ((target_mask & (target_mask - 1)) == 0) {
/* only one texture target set */
g_value_init (value, G_TYPE_STRING);
return gst_gl_value_set_texture_target (value,
_gst_gl_log2_int64 (target_mask));
} else {
GValue item = G_VALUE_INIT;
gboolean ret = FALSE;
g_value_init (value, GST_TYPE_LIST);
g_value_init (&item, G_TYPE_STRING);
if (target_mask & (1 << GST_GL_TEXTURE_TARGET_2D)) {
gst_gl_value_set_texture_target (&item, GST_GL_TEXTURE_TARGET_2D);
gst_value_list_append_value (value, &item);
ret = TRUE;
}
if (target_mask & (1 << GST_GL_TEXTURE_TARGET_RECTANGLE)) {
gst_gl_value_set_texture_target (&item, GST_GL_TEXTURE_TARGET_RECTANGLE);
gst_value_list_append_value (value, &item);
ret = TRUE;
}
if (target_mask & (1 << GST_GL_TEXTURE_TARGET_EXTERNAL_OES)) {
gst_gl_value_set_texture_target (&item,
GST_GL_TEXTURE_TARGET_EXTERNAL_OES);
gst_value_list_append_value (value, &item);
ret = TRUE;
}
return ret;
}
}
static const gfloat identity_matrix[] = {
1.0f, 0.0f, 0.0, 0.0f,
0.0f, 1.0f, 0.0, 0.0f,
0.0f, 0.0f, 1.0, 0.0f,
0.0f, 0.0f, 0.0, 1.0f,
};
static const gfloat from_ndc_matrix[] = {
0.5f, 0.0f, 0.0, 0.5f,
0.0f, 0.5f, 0.0, 0.5f,
0.0f, 0.0f, 0.5, 0.5f,
0.0f, 0.0f, 0.0, 1.0f,
};
static const gfloat to_ndc_matrix[] = {
2.0f, 0.0f, 0.0, -1.0f,
0.0f, 2.0f, 0.0, -1.0f,
0.0f, 0.0f, 2.0, -1.0f,
0.0f, 0.0f, 0.0, 1.0f,
};
void
gst_gl_multiply_matrix4 (const gfloat * a, const gfloat * b, gfloat * result)
{
int i, j, k;
gfloat tmp[16] = { 0.0f };
if (!a || !b || !result)
return;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
for (k = 0; k < 4; k++) {
tmp[i + (j * 4)] += a[i + (k * 4)] * b[k + (j * 4)];
}
}
}
for (i = 0; i < 16; i++)
result[i] = tmp[i];
}
void
gst_gl_get_affine_transformation_meta_as_ndc (GstVideoAffineTransformationMeta *
meta, gfloat * matrix)
{
if (!meta) {
int i;
for (i = 0; i < 16; i++) {
matrix[i] = identity_matrix[i];
}
} else {
gfloat tmp[16] = { 0.0f };
gst_gl_multiply_matrix4 (from_ndc_matrix, meta->matrix, tmp);
gst_gl_multiply_matrix4 (tmp, to_ndc_matrix, matrix);
}
}
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