mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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325 lines
8.4 KiB
C
325 lines
8.4 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/video/video.h>
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#include "gstglmemory.h"
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/*GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_MEMORY);
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#define GST_CAT_DEFUALT GST_CAT_GL_MEMORY
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_MEMORY);*/
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static GstAllocator *_gl_allocator;
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typedef struct
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{
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GstGLMemory *src;
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GLuint tex_id;
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} GstGLMemoryCopyParams;
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static void
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_gl_mem_init (GstGLMemory * mem, GstAllocator * allocator, GstMemory * parent,
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GstGLDisplay * display, GstVideoFormat v_format, gsize width, gsize height)
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{
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gst_memory_init (GST_MEMORY_CAST (mem), GST_MEMORY_FLAG_NO_SHARE,
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allocator, parent, 0, 0, 0, 0);
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mem->display = g_object_ref (display);
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mem->gl_format = GL_RGBA;
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mem->v_format = v_format;
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mem->width = width;
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mem->height = height;
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GST_DEBUG ("new GL memory");
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}
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static GstGLMemory *
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_gl_mem_new (GstAllocator * allocator, GstMemory * parent,
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GstGLDisplay * display, GstVideoFormat v_format, gsize width, gsize height)
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{
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GstGLMemory *mem;
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GLuint tex_id;
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gst_gl_display_gen_texture (display, &tex_id, v_format, width, height);
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if (!tex_id) {
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GST_WARNING ("Could not create GL texture with display:%p", display);
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}
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GST_TRACE ("created texture %u", tex_id);
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mem = g_slice_alloc (sizeof (GstGLMemory));
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_gl_mem_init (mem, allocator, parent, display, v_format, width, height);
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mem->tex_id = tex_id;
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return mem;
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}
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GstMemory *
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_gl_allocator_alloc_func (GstAllocator * allocator, gsize size,
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GstAllocationParams * params, gpointer user_data)
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{
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g_warning ("use gst_gl_memory_alloc () to allocate from this "
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"GstGLMemory allocator");
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return NULL;
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}
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gpointer
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_gl_mem_map_func (GstGLMemory * gl_mem, gsize maxsize, GstMapFlags flags)
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{
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/* should we perform a {up,down}load? */
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return NULL;
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}
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void
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_gl_mem_unmap_func (GstGLMemory * gl_mem)
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{
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}
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void
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_gl_mem_free_func (GstGLMemory * gl_mem)
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{
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gst_gl_display_del_texture (gl_mem->display, &gl_mem->tex_id);
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g_object_unref (gl_mem->display);
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g_slice_free (GstGLMemory, gl_mem);
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}
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void
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_gl_mem_copy_thread (GstGLDisplay * display, gpointer data)
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{
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GstGLMemoryCopyParams *copy_params;
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GstGLMemory *src;
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GLuint tex_id;
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GLuint rboId, fboId;
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GLenum status;
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gsize width, height;
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GLuint gl_format;
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GstVideoFormat v_format;
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copy_params = (GstGLMemoryCopyParams *) data;
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src = copy_params->src;
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width = src->width;
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height = src->height;
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v_format = src->v_format;
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gl_format = src->gl_format;
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if (!GLEW_EXT_framebuffer_object) {
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//turn off the pipeline because Frame buffer object is a not present
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gst_gl_display_set_error (display,
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"Context, EXT_framebuffer_object not supported");
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return;
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}
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gst_gl_display_gen_texture_thread (src->display, &tex_id, v_format, width,
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height);
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if (!tex_id) {
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GST_WARNING ("Could not create GL texture with display:%p", src->display);
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}
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GST_DEBUG ("created texture %i", tex_id);
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/* create a framebuffer object */
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glGenFramebuffersEXT (1, &fboId);
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glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, fboId);
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/* create a renderbuffer object */
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glGenRenderbuffersEXT (1, &rboId);
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glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, rboId);
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#ifndef OPENGL_ES2
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glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, width,
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height);
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glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT,
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width, height);
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#else
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glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT16,
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width, height);
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#endif
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/* attach the renderbuffer to depth attachment point */
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glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
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GL_RENDERBUFFER_EXT, rboId);
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#ifndef OPENGL_ES2
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glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT,
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GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, rboId);
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#endif
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glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
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GL_TEXTURE_RECTANGLE_ARB, src->tex_id, 0);
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/* check FBO status */
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status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
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if (status != GL_FRAMEBUFFER_COMPLETE) {
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switch (status) {
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case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
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GST_ERROR ("GL_FRAMEBUFFER_UNSUPPORTED");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
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GST_ERROR ("GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
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GST_ERROR ("GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
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GST_ERROR ("GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS");
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break;
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case GL_FRAMEBUFFER_UNDEFINED:
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GST_ERROR ("GL_FRAMEBUFFER_UNDEFINED");
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break;
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default:
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GST_ERROR ("General FBO error");
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}
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goto fbo_error;
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}
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/* copy tex */
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glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex_id);
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glCopyTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, gl_format, 0, 0,
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width, height, 0);
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glBindTexture (GL_TEXTURE_RECTANGLE_ARB, 0);
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glBindFramebuffer (GL_FRAMEBUFFER_EXT, 0);
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glDeleteRenderbuffers (1, &rboId);
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glDeleteFramebuffers (1, &fboId);
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copy_params->tex_id = tex_id;
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fbo_error:
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{
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glDeleteRenderbuffers (1, &rboId);
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glDeleteFramebuffers (1, &fboId);
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copy_params->tex_id = 0;
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}
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}
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GstMemory *
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_gl_mem_copy_func (GstGLMemory * src, gssize offset, gssize size)
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{
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GstGLMemory *dest;
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GstGLMemoryCopyParams copy_params;
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copy_params = (GstGLMemoryCopyParams) {
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src, 0,};
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gst_gl_display_thread_add (src->display, _gl_mem_copy_thread, ©_params);
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dest = g_slice_alloc (sizeof (GstGLMemory));
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_gl_mem_init (dest, src->mem.allocator, NULL, src->display, src->v_format,
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src->width, src->height);
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if (!copy_params.tex_id)
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GST_WARNING ("Could not copy GL Memory");
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dest->tex_id = copy_params.tex_id;
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return (GstMemory *) dest;
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}
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GstGLMemory *
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gst_gl_memory_copy (GstGLMemory * src)
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{
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return (GstGLMemory *) _gl_mem_copy_func (src, 0, 0);
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}
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GstMemory *
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_gl_mem_share_func (GstGLMemory * mem, gssize offset, gssize size)
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{
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return NULL;
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}
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gboolean
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_gl_mem_is_span_func (GstGLMemory * mem1, GstGLMemory * mem2, gsize * offset)
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{
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return FALSE;
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}
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static void
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_gl_mem_destroy_free (GstMiniObject * allocator)
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{
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GST_LOG ("GLTexture memory allocator freed");
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g_slice_free (GstAllocator, (GstAllocator *) allocator);
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}
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/**
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* gst_gl_memory_alloc:
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* @display:a #GstGLDisplay
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* @format: the format for the texture
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* @width: width of the texture
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* @height: height of the texture
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*
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* Returns: a GstMemory object with a GL texture specified by @format, @width and @height
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* from @display
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*/
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GstMemory *
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gst_gl_memory_alloc (GstGLDisplay * display, GstVideoFormat format,
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gsize width, gsize height)
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{
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return (GstMemory *) _gl_mem_new (_gl_allocator, NULL, display, format, width,
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height);
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}
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/**
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* gst_gl_memory_init:
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*
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* Initializes the GL Memory allocator. It is safe to call this function multiple times
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*
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* Returns: a #GstAllocator
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*/
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void
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gst_gl_memory_init (void)
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{
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static volatile gsize _init = 0;
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static const GstMemoryInfo mem_info = {
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GST_GL_MEMORY_ALLOCATOR,
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(GstAllocatorAllocFunction) _gl_allocator_alloc_func,
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(GstMemoryMapFunction) _gl_mem_map_func,
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(GstMemoryUnmapFunction) _gl_mem_unmap_func,
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(GstMemoryFreeFunction) _gl_mem_free_func,
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(GstMemoryCopyFunction) _gl_mem_copy_func,
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(GstMemoryShareFunction) _gl_mem_share_func,
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(GstMemoryIsSpanFunction) _gl_mem_is_span_func,
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};
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if (g_once_init_enter (&_init)) {
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_gl_allocator = g_slice_new (GstAllocator);
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gst_allocator_init (_gl_allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC,
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&mem_info, _gl_mem_destroy_free);
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gst_allocator_register (GST_GL_MEMORY_ALLOCATOR,
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gst_allocator_ref (_gl_allocator));
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g_once_init_leave (&_init, 1);
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}
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}
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