/* * 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <stdio.h> #include <gst/video/video.h> #include <gst/gl/gl.h> #include "gstqsgtexture.h" #define GST_CAT_DEFAULT gst_qsg_texture_debug GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); GstQSGTexture::GstQSGTexture () { static volatile gsize _debug; initializeOpenGLFunctions(); if (g_once_init_enter (&_debug)) { GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "qtqsgtexture", 0, "Qt Scenegraph Texture"); g_once_init_leave (&_debug, 1); } gst_video_info_init (&this->v_info); this->buffer_ = NULL; this->sync_buffer_ = gst_buffer_new (); } GstQSGTexture::~GstQSGTexture () { gst_buffer_replace (&this->buffer_, NULL); gst_buffer_replace (&this->sync_buffer_, NULL); } /* only called from the streaming thread with scene graph thread blocked */ void GstQSGTexture::setCaps (GstCaps * caps) { GST_LOG ("%p setCaps %" GST_PTR_FORMAT, this, caps); gst_video_info_from_caps (&this->v_info, caps); } /* only called from the streaming thread with scene graph thread blocked */ gboolean GstQSGTexture::setBuffer (GstBuffer * buffer) { GST_LOG ("%p setBuffer %" GST_PTR_FORMAT, this, buffer); /* FIXME: update more state here */ if (!gst_buffer_replace (&this->buffer_, buffer)) return FALSE; this->qt_context_ = gst_gl_context_get_current (); return TRUE; } /* only called from qt's scene graph render thread */ void GstQSGTexture::bind () { const GstGLFuncs *gl; GstGLContext *context; GstGLSyncMeta *sync_meta; GstMemory *mem; guint tex_id; gst_gl_context_activate (this->qt_context_, TRUE); if (!this->buffer_) goto out; if (GST_VIDEO_INFO_FORMAT (&this->v_info) == GST_VIDEO_FORMAT_UNKNOWN) goto out; this->mem_ = gst_buffer_peek_memory (this->buffer_, 0); if (!this->mem_) goto out; g_assert (this->qt_context_); gl = this->qt_context_->gl_vtable; /* FIXME: should really lock the memory to prevent write access */ if (!gst_video_frame_map (&this->v_frame, &this->v_info, this->buffer_, (GstMapFlags) (GST_MAP_READ | GST_MAP_GL))) { g_assert_not_reached (); goto out; } mem = gst_buffer_peek_memory (this->buffer_, 0); g_assert (gst_is_gl_memory (mem)); context = ((GstGLBaseMemory *)mem)->context; sync_meta = gst_buffer_get_gl_sync_meta (this->sync_buffer_); if (!sync_meta) sync_meta = gst_buffer_add_gl_sync_meta (context, this->sync_buffer_); gst_gl_sync_meta_set_sync_point (sync_meta, context); gst_gl_sync_meta_wait (sync_meta, this->qt_context_); tex_id = *(guint *) this->v_frame.data[0]; GST_LOG ("%p binding Qt texture %u", this, tex_id); gl->BindTexture (GL_TEXTURE_2D, tex_id); gst_video_frame_unmap (&this->v_frame); out: gst_gl_context_activate (this->qt_context_, FALSE); } /* can be called from any thread */ int GstQSGTexture::textureId () const { int tex_id = 0; if (this->buffer_) { GstMemory *mem = gst_buffer_peek_memory (this->buffer_, 0); tex_id = ((GstGLMemory *) mem)->tex_id; } GST_LOG ("%p get texture id %u", this, tex_id); return tex_id; } /* can be called from any thread */ QSize GstQSGTexture::textureSize () const { if (GST_VIDEO_INFO_FORMAT (&this->v_info) == GST_VIDEO_FORMAT_UNKNOWN) return QSize (0, 0); GST_TRACE ("%p get texture size %ux%u", this, this->v_info.width, this->v_info.height); return QSize (this->v_info.width, this->v_info.height); } /* can be called from any thread */ bool GstQSGTexture::hasAlphaChannel () const { /* FIXME: support RGB textures */ return true; } /* can be called from any thread */ bool GstQSGTexture::hasMipmaps () const { return false; }