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>
31 #include <common/timer.h>
35 #include <boost/property_tree/ptree.hpp>
37 #include <tbb/atomic.h>
39 namespace caspar { namespace accelerator { namespace ogl {
41 static tbb::atomic<int> g_w_total_count;
42 static tbb::atomic<std::size_t> g_w_total_size;
43 static tbb::atomic<int> g_r_total_count;
44 static tbb::atomic<std::size_t> g_r_total_size;
46 struct buffer::impl : boost::noncopyable
49 const std::size_t size_;
50 tbb::atomic<uint8_t*> data_;
55 impl(std::size_t size, buffer::usage usage)
57 , target_(usage == buffer::usage::write_only ? GL_PIXEL_UNPACK_BUFFER : GL_PIXEL_PACK_BUFFER)
58 , usage_(usage == buffer::usage::write_only ? GL_STREAM_DRAW : GL_STREAM_READ)
63 GL(glGenBuffers(1, &pbo_));
65 GL(glBufferData(target_, size_, NULL, usage_));
66 if(usage_ == GL_STREAM_DRAW)
68 auto result = GL2(glMapBuffer(target_, usage_ == GL_STREAM_DRAW ? GL_WRITE_ONLY : GL_READ_ONLY));
69 data_ = reinterpret_cast<uint8_t*>(result);
74 CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Failed to allocate buffer."));
76 (usage == buffer::usage::write_only ? g_w_total_count : g_r_total_count) ++;
77 (usage == buffer::usage::write_only ? g_w_total_size : g_r_total_size) += size_;
79 if(timer.elapsed() > 0.02)
80 CASPAR_LOG(warning) << L"[buffer] Performance warning. Buffer allocation blocked: " << timer.elapsed();
82 //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");
87 glDeleteBuffers(1, &pbo_);
88 (usage_ == GL_STREAM_DRAW ? g_w_total_size : g_r_total_size) -= size_;
89 (usage_ == GL_STREAM_DRAW ? g_w_total_count : g_r_total_count) --;
99 GL(glBindBuffer(target_, pbo_));
100 if(usage_ == GL_STREAM_DRAW)
101 GL(glBufferData(target_, size_, NULL, usage_)); // Notify OpenGL that we don't care about previous data.
103 auto result = GL2(glMapBuffer(target_, usage_ == GL_STREAM_DRAW ? GL_WRITE_ONLY : GL_READ_ONLY));
104 data_ = (uint8_t*) result;
106 if(timer.elapsed() > 0.02)
107 CASPAR_LOG(warning) << L"[buffer] Performance warning. Buffer mapping blocked: " << timer.elapsed();
109 GL(glBindBuffer(target_, 0));
111 CASPAR_THROW_EXCEPTION(invalid_operation() << msg_info("Failed to map target OpenGL Pixel Buffer Object."));
121 GL(glBindBuffer(target_, pbo_));
122 GL(glUnmapBuffer(target_));
123 if(usage_ == GL_STREAM_READ)
124 GL(glBufferData(target_, size_, NULL, usage_)); // Notify OpenGL that we don't care about previous data.
126 GL(glBindBuffer(target_, 0));
131 GL(glBindBuffer(target_, pbo_));
136 GL(glBindBuffer(target_, 0));
140 buffer::buffer(std::size_t size, usage usage) : impl_(new impl(size, usage)){}
141 buffer::buffer(buffer&& other) : impl_(std::move(other.impl_)){}
143 buffer& buffer::operator=(buffer&& other){impl_ = std::move(other.impl_); return *this;}
144 uint8_t* buffer::data(){return impl_->data_;}
145 void buffer::map(){impl_->map();}
146 void buffer::unmap(){impl_->unmap();}
147 void buffer::bind() const{impl_->bind();}
148 void buffer::unbind() const{impl_->unbind();}
149 std::size_t buffer::size() const { return impl_->size_; }
150 int buffer::id() const {return impl_->pbo_;}
152 boost::property_tree::wptree buffer::info()
154 boost::property_tree::wptree info;
156 info.add(L"total_read_count", g_r_total_count);
157 info.add(L"total_write_count", g_w_total_count);
158 info.add(L"total_read_size", g_r_total_size);
159 info.add(L"total_write_size", g_w_total_size);