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gstreamer/gst-libs/gst/gl/gstgldownload.c
Matthew Waters 4c35d682c9 [603/906] update FSF address
2017-12-09 19:31:25 +00:00

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/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystree00@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 "gstgldownload.h"
#include "gstglmemory.h"
/**
* SECTION:gstgldownload
* @short_description: an object that downloads GL textures
* @see_also: #GstGLUpload, #GstGLMemory
*
* #GstGLDownload is an object that downloads GL textures into system memory.
*
* A #GstGLDownload can be created with gst_gl_download_new() or found with
* gst_gl_display_find_download().
*
* All of the _thread() variants should only be called within the GL thread
* they don't try to take a lock on the associated #GstGLDisplay and
* don't dispatch to the GL thread. Rather they run the required code in the
* calling thread.
*/
static void _do_download (GstGLDisplay * display, GstGLDownload * download);
static void _do_download_draw_rgb (GstGLDisplay * display,
GstGLDownload * download);
static void _do_download_draw_yuv (GstGLDisplay * display,
GstGLDownload * download);
static void _init_download (GstGLDisplay * display, GstGLDownload * download);
static void _init_download_shader (GstGLDisplay * display,
GstGLDownload * download);
static gboolean gst_gl_download_perform_with_data_unlocked (GstGLDownload *
download, GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES]);
static gboolean gst_gl_download_perform_with_data_unlocked_thread (GstGLDownload
* download, GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES]);
/* YUY2:y2,u,y1,v
UYVY:v,y1,u,y2 */
static gchar *text_shader_download_YUY2_UYVY =
#ifndef OPENGL_ES2
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect tex;\n"
#else
"precision mediump float;\n"
"varying vec2 v_texCoord;\n" "uniform sampler2D tex;\n"
#endif
"void main(void) {\n" " float fx,fy,r,g,b,r2,g2,b2,y1,y2,u,v;\n"
#ifndef OPENGL_ES2
" fx = gl_TexCoord[0].x;\n"
" fy = gl_TexCoord[0].y;\n"
" r=texture2DRect(tex,vec2(fx*2.0,fy)).r;\n"
" g=texture2DRect(tex,vec2(fx*2.0,fy)).g;\n"
" b=texture2DRect(tex,vec2(fx*2.0,fy)).b;\n"
" r2=texture2DRect(tex,vec2(fx*2.0+1.0,fy)).r;\n"
" g2=texture2DRect(tex,vec2(fx*2.0+1.0,fy)).g;\n"
" b2=texture2DRect(tex,vec2(fx*2.0+1.0,fy)).b;\n"
#else
" fx = v_texCoord.x;\n"
" fy = v_texCoord.y;\n"
" r=texture2D(tex,vec2(fx*2.0,fy)).r;\n"
" g=texture2D(tex,vec2(fx*2.0,fy)).g;\n"
" b=texture2D(tex,vec2(fx*2.0,fy)).b;\n"
" r2=texture2D(tex,vec2(fx*2.0+1.0,fy)).r;\n"
" g2=texture2D(tex,vec2(fx*2.0+1.0,fy)).g;\n"
" b2=texture2D(tex,vec2(fx*2.0+1.0,fy)).b;\n"
#endif
" y1=0.299011*r + 0.586987*g + 0.114001*b;\n"
" y2=0.299011*r2 + 0.586987*g2 + 0.114001*b2;\n"
" u=-0.148246*r -0.29102*g + 0.439266*b;\n"
" v=0.439271*r - 0.367833*g - 0.071438*b ;\n"
" y1=0.858885*y1 + 0.0625;\n"
" y2=0.858885*y2 + 0.0625;\n"
" u=u + 0.5;\n" " v=v + 0.5;\n" " gl_FragColor=vec4(%s);\n" "}\n";
/* no OpenGL ES 2.0 support because for now it's not possible
* to attach multiple textures to a frame buffer object
*/
static gchar *text_shader_download_I420_YV12 =
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect tex;\n"
"uniform float w, h;\n"
"void main(void) {\n"
" float r,g,b,r2,b2,g2,y,u,v;\n"
" vec2 nxy=gl_TexCoord[0].xy;\n"
" vec2 nxy2=nxy*2.0;\n"
" r=texture2DRect(tex,nxy).r;\n"
" g=texture2DRect(tex,nxy).g;\n"
" b=texture2DRect(tex,nxy).b;\n"
" r2=texture2DRect(tex,nxy2).r;\n"
" g2=texture2DRect(tex,nxy2).g;\n"
" b2=texture2DRect(tex,nxy2).b;\n"
" y=0.299011*r + 0.586987*g + 0.114001*b;\n"
" u=-0.148246*r2 -0.29102*g2 + 0.439266*b2;\n"
" v=0.439271*r2 - 0.367833*g2 - 0.071438*b2 ;\n"
" y=0.858885*y + 0.0625;\n"
" u=u + 0.5;\n"
" v=v + 0.5;\n"
" gl_FragData[0] = vec4(y, 0.0, 0.0, 1.0);\n"
" gl_FragData[1] = vec4(u, 0.0, 0.0, 1.0);\n"
" gl_FragData[2] = vec4(v, 0.0, 0.0, 1.0);\n" "}\n";
static gchar *text_shader_download_AYUV =
#ifndef OPENGL_ES2
"#extension GL_ARB_texture_rectangle : enable\n"
"uniform sampler2DRect tex;\n"
#else
"precision mediump float;\n"
"varying vec2 v_texCoord;\n" "uniform sampler2D tex;\n"
#endif
"void main(void) {\n" " float r,g,b,y,u,v;\n"
#ifndef OPENGL_ES2
" vec2 nxy=gl_TexCoord[0].xy;\n"
" r=texture2DRect(tex,nxy).r;\n"
" g=texture2DRect(tex,nxy).g;\n" " b=texture2DRect(tex,nxy).b;\n"
#else
" vec2 nxy=v_texCoord.xy;\n"
" r=texture2D(tex,nxy).r;\n"
" g=texture2D(tex,nxy).g;\n" " b=texture2D(tex,nxy).b;\n"
#endif
" y=0.299011*r + 0.586987*g + 0.114001*b;\n"
" u=-0.148246*r -0.29102*g + 0.439266*b;\n"
" v=0.439271*r - 0.367833*g - 0.071438*b ;\n"
" y=0.858885*y + 0.0625;\n" " u=u + 0.5;\n" " v=v + 0.5;\n"
#ifndef OPENGL_ES2
" gl_FragColor=vec4(y,u,v,1.0);\n"
#else
" gl_FragColor=vec4(1.0,y,u,v);\n"
#endif
"}\n";
#ifdef OPENGL_ES2
static gchar *text_vertex_shader_download =
"attribute vec4 a_position; \n"
"attribute vec2 a_texCoord; \n"
"varying vec2 v_texCoord; \n"
"void main() \n"
"{ \n"
" gl_Position = a_position; \n"
" v_texCoord = a_texCoord; \n" "} \n";
static gchar *text_fragment_shader_download_RGB =
"precision mediump float; \n"
"varying vec2 v_texCoord; \n"
"uniform sampler2D s_texture; \n"
"void main() \n"
"{ \n"
" gl_FragColor = texture2D( s_texture, v_texCoord );\n"
"} \n";
#endif
GST_DEBUG_CATEGORY_STATIC (gst_gl_download_debug);
#define GST_CAT_DEFAULT gst_gl_download_debug
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_download_debug, "gldownload", 0, "download");
G_DEFINE_TYPE_WITH_CODE (GstGLDownload, gst_gl_download, G_TYPE_OBJECT,
DEBUG_INIT);
static void gst_gl_download_finalize (GObject * object);
#define GST_GL_DOWNLOAD_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
GST_TYPE_GL_DOWNLOAD, GstGLDownloadPrivate))
static void
gst_gl_download_class_init (GstGLDownloadClass * klass)
{
G_OBJECT_CLASS (klass)->finalize = gst_gl_download_finalize;
}
static void
gst_gl_download_init (GstGLDownload * download)
{
download->display = NULL;
g_mutex_init (&download->lock);
download->fbo = 0;
download->depth_buffer = 0;
download->in_texture = 0;
download->shader = NULL;
#ifdef OPENGL_ES2
download->shader_attr_position_loc = 0;
download->shader_attr_texture_loc = 0;
#endif
gst_video_info_init (&download->info);
}
/**
* gst_gl_download_new:
* @display: a #GstGLDisplay
*
* Returns: a new #GstGLDownload object
*/
GstGLDownload *
gst_gl_download_new (GstGLDisplay * display)
{
GstGLDownload *download;
download = g_object_new (GST_TYPE_GL_DOWNLOAD, NULL);
download->display = g_object_ref (display);
return download;
}
static void
gst_gl_download_finalize (GObject * object)
{
GstGLDownload *download;
guint i;
download = GST_GL_DOWNLOAD (object);
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
if (download->out_texture[i]) {
gst_gl_display_del_texture (download->display, &download->out_texture[i]);
download->out_texture[i] = 0;
}
}
if (download->in_texture) {
gst_gl_display_del_texture (download->display, &download->in_texture);
download->in_texture = 0;
}
if (download->fbo || download->depth_buffer) {
gst_gl_display_del_fbo (download->display, download->fbo,
download->depth_buffer);
download->fbo = 0;
download->depth_buffer = 0;
}
if (download->shader) {
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
}
if (download->display) {
g_object_unref (G_OBJECT (download->display));
download->display = NULL;
}
g_mutex_clear (&download->lock);
}
static inline gboolean
_init_format_pre (GstGLDownload * download, GstVideoFormat v_format,
guint out_width, guint out_height)
{
g_return_val_if_fail (download != NULL, FALSE);
g_return_val_if_fail (v_format != GST_VIDEO_FORMAT_UNKNOWN, FALSE);
g_return_val_if_fail (v_format != GST_VIDEO_FORMAT_ENCODED, FALSE);
g_return_val_if_fail (out_width > 0 && out_height > 0, FALSE);
return TRUE;
}
/**
* gst_gl_download_init_format:
* @download: a #GstGLDownload
* @v_format: a #GstVideoFormat
* @out_width: the width to download to
* @out_height: the height to download to
*
* Initializes @download with the information required for download.
*
* Returns: whether the initialization was successful
*/
gboolean
gst_gl_download_init_format (GstGLDownload * download, GstVideoFormat v_format,
guint out_width, guint out_height)
{
GstVideoInfo info;
if (!_init_format_pre (download, v_format, out_width, out_height))
return FALSE;
g_mutex_lock (&download->lock);
if (download->initted) {
g_mutex_unlock (&download->lock);
return FALSE;
} else {
download->initted = TRUE;
}
gst_video_info_set_format (&info, v_format, out_width, out_height);
download->info = info;
gst_gl_display_thread_add (download->display,
(GstGLDisplayThreadFunc) _init_download, download);
g_mutex_unlock (&download->lock);
return TRUE;
}
/**
* gst_gl_download_init_format_thread:
* @download: a #GstGLDownload
* @v_format: a #GstVideoFormat
* @out_width: the width to download to
* @out_height: the height to download to
*
* Initializes @download with the information required for download.
*
* Returns: whether the initialization was successful
*/
gboolean
gst_gl_download_init_format_thread (GstGLDownload * download,
GstVideoFormat v_format, guint out_width, guint out_height)
{
GstVideoInfo info;
if (!_init_format_pre (download, v_format, out_width, out_height))
return FALSE;
g_mutex_lock (&download->lock);
if (download->initted) {
g_mutex_unlock (&download->lock);
return FALSE;
} else {
download->initted = TRUE;
}
gst_video_info_set_format (&info, v_format, out_width, out_height);
download->info = info;
_init_download (download->display, download);
g_mutex_unlock (&download->lock);
return TRUE;
}
static inline gboolean
_perform_with_memory_pre (GstGLDownload * download, GstGLMemory * gl_mem)
{
g_return_val_if_fail (download != NULL, FALSE);
if (!GST_GL_MEMORY_FLAG_IS_SET (gl_mem, GST_GL_MEMORY_FLAG_DOWNLOAD_INITTED))
return FALSE;
if (!GST_GL_MEMORY_FLAG_IS_SET (gl_mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD)) {
return FALSE;
}
return TRUE;
}
/**
* gst_gl_download_perform_with_memory:
* @download: a #GstGLDownload
* @gl_mem: a #GstGLMemory
*
* Downloads the texture in @gl_mem
*
* Returns: whether the download was successful
*/
gboolean
gst_gl_download_perform_with_memory (GstGLDownload * download,
GstGLMemory * gl_mem)
{
gpointer data[GST_VIDEO_MAX_PLANES];
guint i;
gboolean ret;
if (!_perform_with_memory_pre (download, gl_mem))
return FALSE;
g_mutex_lock (&download->lock);
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&download->info); i++) {
data[i] = (guint8 *) gl_mem->data +
GST_VIDEO_INFO_PLANE_OFFSET (&download->info, i);
}
ret =
gst_gl_download_perform_with_data_unlocked (download, gl_mem->tex_id,
data);
GST_GL_MEMORY_FLAG_UNSET (gl_mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD);
g_mutex_unlock (&download->lock);
return ret;
}
/**
* gst_gl_download_perform_with_data:
* @download: a #GstGLDownload
* @texture_id: the texture id to download
* @data: (out): where the downloaded data should go
*
* Downloads @texture_id into @data. @data size and format is specified by
* the #GstVideoFormat passed to gst_gl_download_init_format()
*
* Returns: whether the download was successful
*/
gboolean
gst_gl_download_perform_with_data (GstGLDownload * download, GLuint texture_id,
gpointer data[GST_VIDEO_MAX_PLANES])
{
gboolean ret;
g_return_val_if_fail (download != NULL, FALSE);
g_mutex_lock (&download->lock);
ret = gst_gl_download_perform_with_data_unlocked (download, texture_id, data);
g_mutex_unlock (&download->lock);
return ret;
}
static inline gboolean
_perform_with_data_unlocked_pre (GstGLDownload * download, GLuint texture_id,
gpointer data[GST_VIDEO_MAX_PLANES])
{
guint i;
g_return_val_if_fail (download != NULL, FALSE);
g_return_val_if_fail (texture_id > 0, FALSE);
g_return_val_if_fail (GST_VIDEO_INFO_FORMAT (&download->info) !=
GST_VIDEO_FORMAT_UNKNOWN
&& GST_VIDEO_INFO_FORMAT (&download->info) != GST_VIDEO_FORMAT_ENCODED,
FALSE);
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&download->info); i++) {
g_return_val_if_fail (data[i] != NULL, FALSE);
}
download->in_texture = texture_id;
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&download->info); i++) {
download->data[i] = data[i];
}
return TRUE;
}
static gboolean
gst_gl_download_perform_with_data_unlocked (GstGLDownload * download,
GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES])
{
if (!_perform_with_data_unlocked_pre (download, texture_id, data))
return FALSE;
gst_gl_display_thread_add (download->display,
(GstGLDisplayThreadFunc) _do_download, download);
return TRUE;
}
/**
* gst_gl_download_perform_with_memory_thread:
* @download: a #GstGLDownload
* @gl_mem: a #GstGLMemory
*
* Downloads the texture in @gl_mem
*
* Returns: whether the download was successful
*/
gboolean
gst_gl_download_perform_with_memory_thread (GstGLDownload * download,
GstGLMemory * gl_mem)
{
gpointer data[GST_VIDEO_MAX_PLANES];
guint i;
gboolean ret;
if (!_perform_with_memory_pre (download, gl_mem))
return FALSE;
g_mutex_lock (&download->lock);
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&download->info); i++) {
data[i] = (guint8 *) gl_mem->data +
GST_VIDEO_INFO_PLANE_OFFSET (&download->info, i);
}
ret =
gst_gl_download_perform_with_data_unlocked_thread (download,
gl_mem->tex_id, data);
GST_GL_MEMORY_FLAG_UNSET (gl_mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD);
g_mutex_unlock (&download->lock);
return ret;
}
/**
* gst_gl_download_perform_with_data_thread:
* @download: a #GstGLDownload
* @texture_id: the texture id to download
* @data: (out): where the downloaded data should go
*
* Downloads @texture_id into @data. @data size and format is specified by
* the #GstVideoFormat passed to gst_gl_download_init_format()
*
* Returns: whether the download was successful
*/
gboolean
gst_gl_download_perform_with_data_thread (GstGLDownload * download,
GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES])
{
gboolean ret;
g_return_val_if_fail (download != NULL, FALSE);
g_mutex_lock (&download->lock);
ret = gst_gl_download_perform_with_data_unlocked_thread (download,
texture_id, data);
g_mutex_unlock (&download->lock);
return ret;
}
static gboolean
gst_gl_download_perform_with_data_unlocked_thread (GstGLDownload * download,
GLuint texture_id, gpointer data[GST_VIDEO_MAX_PLANES])
{
if (!_perform_with_data_unlocked_pre (download, texture_id, data))
return FALSE;
_do_download (download->display, download);
return TRUE;
}
/**
* gst_gl_display_find_download_unlocked:
* @display: a #GstGLDisplay
* @v_format: a #GstVideoFormat
* @out_width: the width to download to
* @out_height: the height to download to
*
* Finds a #GstGLDownload with the required download settings, creating one
* if needed. The returned object may not be initialized so you still
* have to call gst_gl_download_init_format.
*
* This function is safe to be called in the GL thread
*
* Returns: a #GstGLDownload object with the required settings
*/
GstGLDownload *
gst_gl_display_find_download_unlocked (GstGLDisplay * display,
GstVideoFormat v_format, guint out_width, guint out_height)
{
GstGLDownload *ret;
GSList *walk;
walk = display->downloads;
while (walk) {
ret = walk->data;
if (ret && v_format == GST_VIDEO_INFO_FORMAT (&ret->info) &&
out_width == GST_VIDEO_INFO_WIDTH (&ret->info) &&
out_height == GST_VIDEO_INFO_HEIGHT (&ret->info))
break;
ret = NULL;
walk = g_slist_next (walk);
}
if (!ret) {
ret = gst_gl_download_new (display);
display->downloads = g_slist_prepend (display->downloads, ret);
}
return ret;
}
/**
* gst_gl_display_find_download:
* @display: a #GstGLDisplay
* @v_format: a #GstVideoFormat
* @out_width: the width to download to
* @out_height: the height to download to
*
* Finds a #GstGLDownload with the required download settings, creating one
* if needed. The returned object may not be initialized so you still
* have to call gst_gl_download_init_format.
*
* Returns: a #GstGLDownload object with the required settings
*/
GstGLDownload *
gst_gl_display_find_download (GstGLDisplay * display, GstVideoFormat v_format,
guint out_width, guint out_height)
{
GstGLDownload *ret;
gst_gl_display_lock (display);
ret = gst_gl_display_find_download_unlocked (display, v_format,
out_width, out_height);
gst_gl_display_unlock (display);
return ret;
}
static void
_init_download (GstGLDisplay * display, GstGLDownload * download)
{
GstVideoFormat v_format;
guint out_width, out_height;
v_format = GST_VIDEO_INFO_FORMAT (&download->info);
out_width = GST_VIDEO_INFO_WIDTH (&download->info);
out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
GST_TRACE ("initializing texture download for format %d", v_format);
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_RGB:
case GST_VIDEO_FORMAT_BGR:
/* color space conversion is not needed */
#ifndef OPENGL_ES2
break;
#endif
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_AYUV:
/* color space conversion is needed */
{
if (!GLEW_EXT_framebuffer_object) {
/* Frame buffer object is a requirement
* when using GLSL colorspace conversion
*/
gst_gl_display_set_error (display,
"Context, EXT_framebuffer_object supported: no");
return;
}
GST_INFO ("Context, EXT_framebuffer_object supported: yes");
/* setup FBO */
glGenFramebuffersEXT (1, &download->fbo);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, download->fbo);
/* setup the render buffer for depth */
glGenRenderbuffersEXT (1, &download->depth_buffer);
glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, download->depth_buffer);
#ifndef OPENGL_ES2
glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT,
out_width, out_height);
glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT,
out_width, out_height);
#else
glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT16,
out_width, out_height);
#endif
/* setup a first texture to render to */
glGenTextures (1, &download->out_texture[0]);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->out_texture[0]);
glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8,
out_width, out_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
/* attach the first texture to the FBO to renderer to */
glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_RECTANGLE_ARB, download->out_texture[0], 0);
if (v_format == GST_VIDEO_FORMAT_I420 ||
v_format == GST_VIDEO_FORMAT_YV12) {
/* setup a second texture to render to */
glGenTextures (1, &download->out_texture[1]);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->out_texture[1]);
glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8,
out_width, out_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
/* attach the second texture to the FBO to renderer to */
glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT1_EXT, GL_TEXTURE_RECTANGLE_ARB,
download->out_texture[1], 0);
/* setup a third texture to render to */
glGenTextures (1, &download->out_texture[2]);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->out_texture[2]);
glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8,
out_width, out_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S,
GL_CLAMP_TO_EDGE);
glTexParameteri (GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T,
GL_CLAMP_TO_EDGE);
/* attach the third texture to the FBO to renderer to */
glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT2_EXT, GL_TEXTURE_RECTANGLE_ARB,
download->out_texture[2], 0);
}
/* attach the depth render buffer to the FBO */
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, download->depth_buffer);
#ifndef OPENGL_ES2
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT,
download->depth_buffer);
#endif
gst_gl_display_check_framebuffer_status ();
if (glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) !=
GL_FRAMEBUFFER_COMPLETE_EXT) {
gst_gl_display_set_error (display, "GL framebuffer status incomplete");
}
/* unbind the FBO */
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
}
break;
default:
break;
gst_gl_display_set_error (display, "Unsupported download video format %d",
v_format);
g_assert_not_reached ();
}
_init_download_shader (display, download);
}
static void
_init_download_shader (GstGLDisplay * display, GstGLDownload * download)
{
GstVideoFormat v_format;
v_format = GST_VIDEO_INFO_FORMAT (&download->info);
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_RGB:
case GST_VIDEO_FORMAT_BGR:
/* color space conversion is not needed */
#ifdef OPENGL_ES2
{
/* glGetTexImage2D not available in OpenGL ES 2.0 */
GError *error = NULL;
download->shader = gst_gl_shader_new ();
gst_gl_shader_set_vertex_source (download->shader,
text_vertex_shader_download);
gst_gl_shader_set_fragment_source (download->shader,
text_fragment_shader_download_RGB);
gst_gl_shader_compile (download->shader, &error);
if (error) {
gst_gl_display_set_error (display, "%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
} else {
download->shader_attr_position_loc =
gst_gl_shader_get_attribute_location (download->shader,
"a_position");
download->shader_attr_texture_loc =
gst_gl_shader_get_attribute_location (download->shader,
"a_texCoord");
}
}
#endif
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_AYUV:
/* color space conversion is needed */
{
#ifdef OPENGL_ES2
GError *error = NULL;
#endif
/* check if fragment shader is available, then load them
* GLSL is a requirement for download
*/
if (!GLEW_ARB_fragment_shader) {
/* colorspace conversion is not possible */
gst_gl_display_set_error (display,
"Context, ARB_fragment_shader supported: no");
return;
}
switch (v_format) {
case GST_VIDEO_FORMAT_YUY2:
{
gchar text_shader_download_YUY2[2048];
sprintf (text_shader_download_YUY2,
text_shader_download_YUY2_UYVY, "y2,u,y1,v");
download->shader = gst_gl_shader_new ();
#ifndef OPENGL_ES2
if (!gst_gl_shader_compile_and_check (download->shader,
text_shader_download_YUY2, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (display,
"Failed to initialize shader for downloading YUY2");
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
}
#else
gst_gl_shader_set_vertex_source (download->shader,
text_vertex_shader_download);
gst_gl_shader_set_fragment_source (download->shader,
text_shader_download_YUY2);
gst_gl_shader_compile (download->shader, &error);
if (error) {
gst_gl_display_set_error (display, "%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
} else {
download->shader_attr_position_loc =
gst_gl_shader_get_attribute_location
(download->shader, "a_position");
download->shader_attr_texture_loc =
gst_gl_shader_get_attribute_location
(download->shader, "a_texCoord");
}
#endif
}
break;
case GST_VIDEO_FORMAT_UYVY:
{
gchar text_shader_download_UYVY[2048];
sprintf (text_shader_download_UYVY,
text_shader_download_YUY2_UYVY, "v,y1,u,y2");
download->shader = gst_gl_shader_new ();
#ifndef OPENGL_ES2
if (!gst_gl_shader_compile_and_check (download->shader,
text_shader_download_UYVY, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (display,
"Failed to initialize shader for downloading UYVY");
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
}
#else
gst_gl_shader_set_vertex_source (download->shader,
text_vertex_shader_download);
gst_gl_shader_set_fragment_source (download->shader,
text_shader_download_UYVY);
gst_gl_shader_compile (download->shader, &error);
if (error) {
gst_gl_display_set_error (display, "%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
} else {
download->shader_attr_position_loc =
gst_gl_shader_get_attribute_location
(download->shader, "a_position");
download->shader_attr_texture_loc =
gst_gl_shader_get_attribute_location
(download->shader, "a_texCoord");
}
#endif
}
break;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
download->shader = gst_gl_shader_new ();
if (!gst_gl_shader_compile_and_check (download->shader,
text_shader_download_I420_YV12,
GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (display,
"Failed to initialize shader for downloading I420 or YV12");
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
}
break;
case GST_VIDEO_FORMAT_AYUV:
download->shader = gst_gl_shader_new ();
#ifndef OPENGL_ES2
if (!gst_gl_shader_compile_and_check (download->shader,
text_shader_download_AYUV, GST_GL_SHADER_FRAGMENT_SOURCE)) {
gst_gl_display_set_error (display,
"Failed to initialize shader for downloading AYUV");
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
}
#else
gst_gl_shader_set_vertex_source (download->shader,
text_vertex_shader_download);
gst_gl_shader_set_fragment_source (download->shader,
text_shader_download_AYUV);
gst_gl_shader_compile (download->shader, &error);
if (error) {
gst_gl_display_set_error (display, "%s", error->message);
g_error_free (error);
error = NULL;
gst_gl_shader_use (NULL);
g_object_unref (G_OBJECT (download->shader));
download->shader = NULL;
} else {
download->shader_attr_position_loc =
gst_gl_shader_get_attribute_location
(download->shader, "a_position");
download->shader_attr_texture_loc =
gst_gl_shader_get_attribute_location
(download->shader, "a_texCoord");
}
#endif
break;
default:
gst_gl_display_set_error (display,
"Unsupported download video format %d", v_format);
g_assert_not_reached ();
break;
}
}
break;
default:
gst_gl_display_set_error (display, "Unsupported download video format %d",
v_format);
g_assert_not_reached ();
break;
}
}
/* Called in the gl thread */
static void
_do_download (GstGLDisplay * display, GstGLDownload * download)
{
GstVideoFormat v_format;
guint out_width, out_height;
v_format = GST_VIDEO_INFO_FORMAT (&download->info);
out_width = GST_VIDEO_INFO_WIDTH (&download->info);
out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
GST_TRACE ("downloading texture:%u format:%d, dimensions:%ux%u",
download->in_texture, v_format, out_width, out_height);
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_RGB:
case GST_VIDEO_FORMAT_BGR:
/* color space conversion is not needed */
_do_download_draw_rgb (display, download);
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_AYUV:
/* color space conversion is needed */
_do_download_draw_yuv (display, download);
break;
default:
gst_gl_display_set_error (display, "Unsupported download video format %d",
v_format);
g_assert_not_reached ();
break;
}
}
/* called by _do_download (in the gl thread) */
static void
_do_download_draw_rgb (GstGLDisplay * display, GstGLDownload * download)
{
GstVideoFormat v_format;
#ifndef OPENGL_ES2
if (download->display->colorspace_conversion ==
GST_GL_DISPLAY_CONVERSION_GLSL)
glUseProgramObjectARB (0);
glEnable (GL_TEXTURE_RECTANGLE_ARB);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->in_texture);
#else
guint out_width, out_height;
const GLfloat vVertices[] = { 1.0f, -1.0f, 0.0f,
1.0f, 0.0f,
-1.0f, -1.0f, 0.0f,
0.0f, 0.0f,
-1.0f, 1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f, 0.0f,
1.0f, 1.0f
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
out_width = GST_VIDEO_INFO_WIDTH (&download->info);
out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, download->fbo);
glViewport (0, 0, out_width, out_height);
glClearColor (0.0, 0.0, 0.0, 0.0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gst_gl_shader_use (download->shader);
glVertexAttribPointer (download->shader_attr_position_loc, 3,
GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), vVertices);
glVertexAttribPointer (download->shader_attr_texture_loc, 2,
GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]);
glEnableVertexAttribArray (download->shader_attr_position_loc);
glEnableVertexAttribArray (download->shader_attr_texture_loc);
glActiveTextureARB (GL_TEXTURE0_ARB);
gst_gl_shader_set_uniform_1i (download->shader, "s_texture", 0);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->in_texture);
glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
glUseProgramObjectARB (0);
#endif
v_format = GST_VIDEO_INFO_FORMAT (&download->info);
switch (v_format) {
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_RGBx:
#ifndef OPENGL_ES2
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA,
GL_UNSIGNED_BYTE, download->data[0]);
#else
glReadPixels (0, 0, out_width, out_height, GL_RGBA, GL_UNSIGNED_BYTE,
download->data[0]);
#endif
break;
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ARGB:
#ifndef OPENGL_ES2
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, download->data[0]);
#else
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, download->data[0]);
#endif /* G_BYTE_ORDER */
#else /* OPENGL_ES2 */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
glReadPixels (0, 0, out_width, out_height, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, download->data[0]);
#else
glReadPixels (0, 0, out_width, out_eight, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, download->data[0]);
#endif /* G_BYTE_ORDER */
#endif /* !OPENGL_ES2 */
break;
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_BGRA:
#ifndef OPENGL_ES2
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_BGRA,
GL_UNSIGNED_BYTE, download->data[0]);
#endif
break;
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_ABGR:
#ifndef OPENGL_ES2
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA,
GL_UNSIGNED_INT_8_8_8_8, download->data[0]);
#else
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA,
GL_UNSIGNED_INT_8_8_8_8_REV, download->data[0]);
#endif /* G_BYTE_ORDER */
#endif /* !OPENGL_ES2 */
break;
case GST_VIDEO_FORMAT_RGB:
#ifndef OPENGL_ES2
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGB,
GL_UNSIGNED_BYTE, download->data[0]);
#else
glReadPixels (0, 0, out_width, out_height, GL_RGB, GL_UNSIGNED_BYTE,
download->data[0]);
#endif
break;
case GST_VIDEO_FORMAT_BGR:
#ifndef OPENGL_ES2
glGetTexImage (GL_TEXTURE_RECTANGLE_ARB, 0, GL_BGR,
GL_UNSIGNED_BYTE, download->data[0]);
#endif
break;
default:
gst_gl_display_set_error (display,
"Download video format inconsistency %d", v_format);
g_assert_not_reached ();
break;
}
#ifndef OPENGL_ES2
glReadBuffer (GL_NONE);
glDisable (GL_TEXTURE_RECTANGLE_ARB);
#endif
}
/* called by _do_download (in the gl thread) */
static void
_do_download_draw_yuv (GstGLDisplay * display, GstGLDownload * download)
{
GstVideoFormat v_format;
guint out_width, out_height;
#ifndef OPENGL_ES2
GLenum multipleRT[] = {
GL_COLOR_ATTACHMENT0_EXT,
GL_COLOR_ATTACHMENT1_EXT,
GL_COLOR_ATTACHMENT2_EXT
};
#else
GLint viewport_dim[4];
const GLfloat vVertices[] = { 1.0f, -1.0f, 0.0f,
1.0f, 0.0f,
-1.0f, -1.0f, 0.0f,
0.0f, .0f,
-1.0f, 1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f, 0.0f,
1.0f, 1.0f
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
#endif
out_width = GST_VIDEO_INFO_WIDTH (&download->info);
out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
v_format = GST_VIDEO_INFO_FORMAT (&download->info);
GST_TRACE ("doing YUV download of texture:%u (%ux%u) using fbo:%u",
download->in_texture, out_width, out_height, download->fbo);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, download->fbo);
#ifndef OPENGL_ES2
glPushAttrib (GL_VIEWPORT_BIT);
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadIdentity ();
gluOrtho2D (0.0, out_width, 0.0, out_height);
glMatrixMode (GL_MODELVIEW);
glPushMatrix ();
glLoadIdentity ();
#else /* OPENGL_ES2 */
glGetIntegerv (GL_VIEWPORT, viewport_dim);
#endif
glViewport (0, 0, out_width, out_height);
switch (v_format) {
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_AYUV:
{
#ifndef OPENGL_ES2
glDrawBuffer (GL_COLOR_ATTACHMENT0_EXT);
#endif
glClearColor (0.0, 0.0, 0.0, 0.0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gst_gl_shader_use (download->shader);
#ifndef OPENGL_ES2
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
#else
glVertexAttribPointer (download->shader_attr_position_loc, 3,
GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), vVertices);
glVertexAttribPointer (download->shader_attr_texture_loc, 2,
GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]);
glEnableVertexAttribArray (download->shader_attr_position_loc);
glEnableVertexAttribArray (download->shader_attr_texture_loc);
#endif
glActiveTextureARB (GL_TEXTURE0_ARB);
gst_gl_shader_set_uniform_1i (download->shader, "tex", 0);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->in_texture);
}
break;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
{
#ifndef OPENGL_ES2
glDrawBuffers (3, multipleRT);
#endif
glClearColor (0.0, 0.0, 0.0, 0.0);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gst_gl_shader_use (download->shader);
#ifndef OPENGL_ES2
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
#endif
glActiveTextureARB (GL_TEXTURE0_ARB);
gst_gl_shader_set_uniform_1i (download->shader, "tex", 0);
gst_gl_shader_set_uniform_1f (download->shader, "w", (gfloat) out_width);
gst_gl_shader_set_uniform_1f (download->shader, "h", (gfloat) out_height);
glBindTexture (GL_TEXTURE_RECTANGLE_ARB, download->in_texture);
}
break;
default:
break;
gst_gl_display_set_error (display,
"Download video format inconsistensy %d", v_format);
}
#ifndef OPENGL_ES2
glBegin (GL_QUADS);
glTexCoord2i (0, 0);
glVertex2f (-1.0f, -1.0f);
glTexCoord2i (out_width, 0);
glVertex2f (1.0f, -1.0f);
glTexCoord2i (out_width, out_height);
glVertex2f (1.0f, 1.0f);
glTexCoord2i (0, out_height);
glVertex2f (-1.0f, 1.0f);
glEnd ();
glDrawBuffer (GL_NONE);
#else /* OPENGL_ES2 */
glDrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
#endif
/* don't check if GLSL is available
* because download yuv is not available
* without GLSL (whereas rgb is)
*/
glUseProgramObjectARB (0);
#ifndef OPENGL_ES2
glDisable (GL_TEXTURE_RECTANGLE_ARB);
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
glMatrixMode (GL_MODELVIEW);
glPopMatrix ();
glPopAttrib ();
#else
glViewport (viewport_dim[0], viewport_dim[1], viewport_dim[2],
viewport_dim[3]);
#endif
gst_gl_display_check_framebuffer_status ();
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, download->fbo);
#ifndef OPENGL_ES2
glReadBuffer (GL_COLOR_ATTACHMENT0_EXT);
#endif
switch (v_format) {
case GST_VIDEO_FORMAT_AYUV:
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
glReadPixels (0, 0, out_width, out_height, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, download->data[0]);
#else
glReadPixels (0, 0, out_width, out_height, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, download->data[0]);
#endif
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
glReadPixels (0, 0, GST_ROUND_UP_2 (out_width) / 2, out_height, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, download->data[0]);
#else
glReadPixels (0, 0, GST_ROUND_UP_2 (out_width) / 2, out_height, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, download->data[0]);
#endif
break;
case GST_VIDEO_FORMAT_I420:
{
glReadPixels (0, 0, out_width, out_height, GL_LUMINANCE, GL_UNSIGNED_BYTE,
download->data[0]);
#ifndef OPENGL_ES2
glReadBuffer (GL_COLOR_ATTACHMENT1_EXT);
#endif
glReadPixels (0, 0, GST_ROUND_UP_2 (out_width) / 2,
GST_ROUND_UP_2 (out_height) / 2, GL_LUMINANCE, GL_UNSIGNED_BYTE,
download->data[1]);
#ifndef OPENGL_ES2
glReadBuffer (GL_COLOR_ATTACHMENT2_EXT);
#endif
glReadPixels (0, 0, GST_ROUND_UP_2 (out_width) / 2,
GST_ROUND_UP_2 (out_height) / 2, GL_LUMINANCE, GL_UNSIGNED_BYTE,
download->data[2]);
}
break;
case GST_VIDEO_FORMAT_YV12:
{
glReadPixels (0, 0, out_width, out_height, GL_LUMINANCE, GL_UNSIGNED_BYTE,
download->data[0]);
#ifndef OPENGL_ES2
glReadBuffer (GL_COLOR_ATTACHMENT1_EXT);
#endif
glReadPixels (0, 0, GST_ROUND_UP_2 (out_width) / 2,
GST_ROUND_UP_2 (out_height) / 2, GL_LUMINANCE, GL_UNSIGNED_BYTE,
download->data[2]);
#ifndef OPENGL_ES2
glReadBuffer (GL_COLOR_ATTACHMENT2_EXT);
#endif
glReadPixels (0, 0, GST_ROUND_UP_2 (out_width) / 2,
GST_ROUND_UP_2 (out_height) / 2, GL_LUMINANCE, GL_UNSIGNED_BYTE,
download->data[1]);
}
break;
default:
break;
gst_gl_display_set_error (display,
"Download video format inconsistensy %d", v_format);
g_assert_not_reached ();
}
#ifndef OPENGL_ES2
glReadBuffer (GL_NONE);
#endif
gst_gl_display_check_framebuffer_status ();
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
}
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