gstreamer/gst-libs/gst/gl/gstglformat.c
2017-04-12 12:57:57 -03:00

383 lines
10 KiB
C

/*
* 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.
*/
/**
* SECTION:gstglformat
* @title: GstGlFormat
* @short_description: utilities for dealing with OpenGL formats
* @see_also: #GstGLBaseMemory, #GstGLMemory, #GstGLFramebuffer, #GstGLBuffer
*
* Some useful utilities for converting between various formats and OpenGL
* formats.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gl/gstglformat.h>
#include <gst/gl/gstglcontext.h>
#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))
#ifndef GL_TEXTURE_RECTANGLE
#define GL_TEXTURE_RECTANGLE 0x84F5
#endif
#ifndef GL_TEXTURE_EXTERNAL_OES
#define GL_TEXTURE_EXTERNAL_OES 0x8D65
#endif
static inline guint
_gl_format_n_components (guint format)
{
switch (format) {
case GST_VIDEO_GL_TEXTURE_TYPE_RGBA:
case GST_GL_RGBA:
return 4;
case GST_VIDEO_GL_TEXTURE_TYPE_RGB:
case GST_VIDEO_GL_TEXTURE_TYPE_RGB16:
case GST_GL_RGB:
return 3;
case GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA:
case GST_VIDEO_GL_TEXTURE_TYPE_RG:
case GST_GL_LUMINANCE_ALPHA:
case GST_GL_RG:
return 2;
case GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE:
case GST_VIDEO_GL_TEXTURE_TYPE_R:
case GST_GL_LUMINANCE:
case GST_GL_RED:
return 1;
default:
return 0;
}
}
static inline guint
_gl_type_n_components (guint type)
{
switch (type) {
case GL_UNSIGNED_BYTE:
return 1;
case GL_UNSIGNED_SHORT_5_6_5:
return 3;
default:
g_assert_not_reached ();
return 0;
}
}
static inline guint
_gl_type_n_bytes (guint type)
{
switch (type) {
case GL_UNSIGNED_BYTE:
return 1;
case GL_UNSIGNED_SHORT_5_6_5:
return 2;
default:
g_assert_not_reached ();
return 0;
}
}
/**
* gst_gl_format_type_n_bytes:
* @format: the OpenGL format, %GL_RGBA, %GL_LUMINANCE, etc
* @type: the OpenGL type, %GL_UNSIGNED_BYTE, %GL_FLOAT, etc
*
* Returns: the number of bytes the specified @format, @type combination takes
* per pixel
*/
guint
gst_gl_format_type_n_bytes (guint format, guint type)
{
return _gl_format_n_components (format) / _gl_type_n_components (type) *
_gl_type_n_bytes (type);
}
/**
* gst_gl_format_from_video_info:
* @context: a #GstGLContext
* @vinfo: a #GstVideoInfo
* @plane: the plane number in @vinfo
*
* Returns: the #GstGLFormat necessary for holding the data in @plane of @vinfo
*/
GstGLFormat
gst_gl_format_from_video_info (GstGLContext * context, GstVideoInfo * vinfo,
guint plane)
{
gboolean texture_rg =
gst_gl_context_check_feature (context, "GL_EXT_texture_rg")
|| gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0)
|| gst_gl_context_check_feature (context, "GL_ARB_texture_rg")
|| gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 0);
GstVideoFormat v_format = GST_VIDEO_INFO_FORMAT (vinfo);
guint n_plane_components;
switch (v_format) {
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_AYUV:
n_plane_components = 4;
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
n_plane_components = 3;
break;
case GST_VIDEO_FORMAT_RGB16:
case GST_VIDEO_FORMAT_BGR16:
return GST_GL_RGB565;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
n_plane_components = 2;
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
n_plane_components = plane == 0 ? 1 : 2;
break;
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y41B:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
n_plane_components = 1;
break;
default:
n_plane_components = 4;
g_assert_not_reached ();
break;
}
switch (n_plane_components) {
case 4:
return GST_GL_RGBA;
break;
case 3:
return GST_GL_RGB;
break;
case 2:
return texture_rg ? GST_GL_RG : GST_GL_LUMINANCE_ALPHA;
break;
case 1:
return texture_rg ? GST_GL_RED : GST_GL_LUMINANCE;
break;
default:
g_assert_not_reached ();
break;
}
return GST_GL_RGBA;
}
/**
* gst_gl_sized_gl_format_from_gl_format_type:
* @context: a #GstGLContext
* @format: an OpenGL format, %GL_RGBA, %GL_LUMINANCE, etc
* @type: an OpenGL type, %GL_UNSIGNED_BYTE, %GL_FLOAT, etc
*
* Returns: the sized internal format specified by @format and @type that can
* be used in @context
*/
guint
gst_gl_sized_gl_format_from_gl_format_type (GstGLContext * context,
guint format, guint type)
{
gboolean ext_texture_rg =
gst_gl_context_check_feature (context, "GL_EXT_texture_rg");
switch (format) {
case GST_GL_RGBA:
switch (type) {
case GL_UNSIGNED_BYTE:
return USING_GLES2 (context)
&& !USING_GLES3 (context) ? GST_GL_RGBA : GST_GL_RGBA8;
break;
}
break;
case GST_GL_RGB:
switch (type) {
case GL_UNSIGNED_BYTE:
return USING_GLES2 (context)
&& !USING_GLES3 (context) ? GST_GL_RGB : GST_GL_RGB8;
break;
case GL_UNSIGNED_SHORT_5_6_5:
return GST_GL_RGB;
break;
}
break;
case GST_GL_RG:
switch (type) {
case GL_UNSIGNED_BYTE:
if (!USING_GLES3 (context) && USING_GLES2 (context) && ext_texture_rg)
return GST_GL_RG;
return GST_GL_RG8;
break;
}
break;
case GST_GL_RED:
switch (type) {
case GL_UNSIGNED_BYTE:
if (!USING_GLES3 (context) && USING_GLES2 (context) && ext_texture_rg)
return GST_GL_RED;
return GST_GL_R8;
break;
}
break;
case GST_GL_RGBA8:
case GST_GL_RGB8:
case GST_GL_RG8:
case GST_GL_R8:
case GST_GL_LUMINANCE:
case GST_GL_LUMINANCE_ALPHA:
case GST_GL_ALPHA:
case GST_GL_DEPTH_COMPONENT16:
case GST_GL_DEPTH24_STENCIL8:
return format;
default:
break;
}
g_assert_not_reached ();
return 0;
}
/**
* gst_gl_texture_target_to_string:
* @target: a #GstGLTextureTarget
*
* Returns: the stringified version of @target or %NULL
*/
const gchar *
gst_gl_texture_target_to_string (GstGLTextureTarget target)
{
switch (target) {
case GST_GL_TEXTURE_TARGET_2D:
return GST_GL_TEXTURE_TARGET_2D_STR;
case GST_GL_TEXTURE_TARGET_RECTANGLE:
return GST_GL_TEXTURE_TARGET_RECTANGLE_STR;
case GST_GL_TEXTURE_TARGET_EXTERNAL_OES:
return GST_GL_TEXTURE_TARGET_EXTERNAL_OES_STR;
default:
return NULL;
}
}
/**
* gst_gl_texture_target_from_string:
* @str: a string equivalant to one of the GST_GL_TEXTURE_TARGET_*_STR values
*
* Returns: the #GstGLTextureTarget represented by @str or
* %GST_GL_TEXTURE_TARGET_NONE
*/
GstGLTextureTarget
gst_gl_texture_target_from_string (const gchar * str)
{
if (!str)
return GST_GL_TEXTURE_TARGET_NONE;
if (g_strcmp0 (str, GST_GL_TEXTURE_TARGET_2D_STR) == 0)
return GST_GL_TEXTURE_TARGET_2D;
if (g_strcmp0 (str, GST_GL_TEXTURE_TARGET_RECTANGLE_STR) == 0)
return GST_GL_TEXTURE_TARGET_RECTANGLE;
if (g_strcmp0 (str, GST_GL_TEXTURE_TARGET_EXTERNAL_OES_STR) == 0)
return GST_GL_TEXTURE_TARGET_EXTERNAL_OES;
return GST_GL_TEXTURE_TARGET_NONE;
}
/**
* gst_gl_texture_target_to_gl:
* @target: a #GstGLTextureTarget
*
* Returns: the OpenGL value for binding the @target with glBindTexture() and
* similar functions or 0
*/
guint
gst_gl_texture_target_to_gl (GstGLTextureTarget target)
{
switch (target) {
case GST_GL_TEXTURE_TARGET_2D:
return GL_TEXTURE_2D;
case GST_GL_TEXTURE_TARGET_RECTANGLE:
return GL_TEXTURE_RECTANGLE;
case GST_GL_TEXTURE_TARGET_EXTERNAL_OES:
return GL_TEXTURE_EXTERNAL_OES;
default:
return 0;
}
}
/**
* gst_gl_texture_target_from_gl:
* @target: an OpenGL texture binding target
*
* Returns: the #GstGLTextureTarget that's equiavalant to @target or
* %GST_GL_TEXTURE_TARGET_NONE
*/
GstGLTextureTarget
gst_gl_texture_target_from_gl (guint target)
{
switch (target) {
case GL_TEXTURE_2D:
return GST_GL_TEXTURE_TARGET_2D;
case GL_TEXTURE_RECTANGLE:
return GST_GL_TEXTURE_TARGET_RECTANGLE;
case GL_TEXTURE_EXTERNAL_OES:
return GST_GL_TEXTURE_TARGET_EXTERNAL_OES;
default:
return GST_GL_TEXTURE_TARGET_NONE;
}
}
/**
* gst_gl_texture_target_to_buffer_pool_option:
* @target: a #GstGLTextureTarget
*
* Returns: a string representing the @GstBufferPoolOption specified by @target
*/
const gchar *
gst_gl_texture_target_to_buffer_pool_option (GstGLTextureTarget target)
{
switch (target) {
case GST_GL_TEXTURE_TARGET_2D:
return GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_2D;
case GST_GL_TEXTURE_TARGET_RECTANGLE:
return GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_RECTANGLE;
case GST_GL_TEXTURE_TARGET_EXTERNAL_OES:
return GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_EXTERNAL_OES;
default:
return NULL;
}
}