2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
4 * This file is part of CasparCG (www.casparcg.com).
6 * CasparCG is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * CasparCG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
19 * Author: Robert Nagy, ronag89@gmail.com
22 #include "../../stdafx.h"
29 #include <common/except.h>
30 #include <common/gl/gl_check.h>
34 #include <tbb/atomic.h>
36 namespace caspar { namespace accelerator { namespace ogl {
38 static tbb::atomic<int> g_w_total_count;
39 static tbb::atomic<int> g_r_total_count;
41 struct buffer::impl : boost::noncopyable
44 const std::size_t size_;
45 tbb::atomic<uint8_t*> data_;
50 impl(std::size_t size, buffer::usage usage)
52 , target_(usage == buffer::usage::write_only ? GL_PIXEL_UNPACK_BUFFER : GL_PIXEL_PACK_BUFFER)
53 , usage_(usage == buffer::usage::write_only ? GL_STREAM_DRAW : GL_STREAM_READ)
58 GL(glGenBuffers(1, &pbo_));
60 GL(glBufferData(target_, size_, NULL, usage_));
61 if(usage_ == GL_STREAM_DRAW)
62 data_ = (uint8_t*)GL2(glMapBuffer(target_, usage_ == GL_STREAM_DRAW ? GL_WRITE_ONLY : GL_READ_ONLY));
66 CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Failed to allocate buffer."));
68 if(timer.elapsed() > 0.02)
69 CASPAR_LOG(debug) << L"[buffer] Performance warning. Buffer allocation blocked: " << timer.elapsed();
71 //CASPAR_LOG(trace) << "[buffer] [" << ++(usage_ == buffer::usage::write_only ? g_w_total_count : g_r_total_count) << L"] allocated size:" << size_ << " usage: " << (usage == buffer::usage::write_only ? "write_only" : "read_only");
76 glDeleteBuffers(1, &pbo_);
86 GL(glBindBuffer(target_, pbo_));
87 if(usage_ == GL_STREAM_DRAW)
88 GL(glBufferData(target_, size_, NULL, usage_)); // Notify OpenGL that we don't care about previous data.
90 data_ = (uint8_t*)GL2(glMapBuffer(target_, usage_ == GL_STREAM_DRAW ? GL_WRITE_ONLY : GL_READ_ONLY));
92 if(timer.elapsed() > 0.02)
93 CASPAR_LOG(debug) << L"[buffer] Performance warning. Buffer mapping blocked: " << timer.elapsed();
95 GL(glBindBuffer(target_, 0));
97 CASPAR_THROW_EXCEPTION(invalid_operation() << msg_info("Failed to map target OpenGL Pixel Buffer Object."));
107 GL(glBindBuffer(target_, pbo_));
108 GL(glUnmapBuffer(target_));
109 if(usage_ == GL_STREAM_READ)
110 GL(glBufferData(target_, size_, NULL, usage_)); // Notify OpenGL that we don't care about previous data.
112 GL(glBindBuffer(target_, 0));
117 GL(glBindBuffer(target_, pbo_));
122 GL(glBindBuffer(target_, 0));
126 buffer::buffer(std::size_t size, usage usage) : impl_(new impl(size, usage)){}
127 buffer::buffer(buffer&& other) : impl_(std::move(other.impl_)){}
129 buffer& buffer::operator=(buffer&& other){impl_ = std::move(other.impl_); return *this;}
130 uint8_t* buffer::data(){return impl_->data_;}
131 void buffer::map(){impl_->map();}
132 void buffer::unmap(){impl_->unmap();}
133 void buffer::bind() const{impl_->bind();}
134 void buffer::unbind() const{impl_->unbind();}
135 std::size_t buffer::size() const { return impl_->size_; }
136 int buffer::id() const {return impl_->pbo_;}