obs-StreamFX/source/ffmpeg/avframe-queue.cpp

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// FFMPEG Video Encoder Integration for OBS Studio
// Copyright (c) 2019 Michael Fabian Dirks <info@xaymar.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "avframe-queue.hpp"
#include "tools.hpp"
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using namespace ffmpeg;
std::shared_ptr<AVFrame> avframe_queue::create_frame()
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{
std::shared_ptr<AVFrame> frame = std::shared_ptr<AVFrame>(av_frame_alloc(), [](AVFrame* frame) {
av_frame_unref(frame);
av_frame_free(&frame);
});
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frame->width = this->_resolution.first;
frame->height = this->_resolution.second;
frame->format = this->_format;
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int res = av_frame_get_buffer(frame.get(), 32);
if (res < 0) {
throw std::runtime_error(tools::get_error_description(res));
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}
return frame;
}
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avframe_queue::avframe_queue() {}
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avframe_queue::~avframe_queue()
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{
clear();
}
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void avframe_queue::set_resolution(uint32_t const width, uint32_t const height)
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{
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this->_resolution.first = width;
this->_resolution.second = height;
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}
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void avframe_queue::get_resolution(uint32_t& width, uint32_t& height)
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{
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width = this->_resolution.first;
height = this->_resolution.second;
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}
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uint32_t avframe_queue::get_width()
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{
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return this->_resolution.first;
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}
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uint32_t avframe_queue::get_height()
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{
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return this->_resolution.second;
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}
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void avframe_queue::set_pixel_format(AVPixelFormat const format)
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{
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this->_format = format;
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}
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AVPixelFormat avframe_queue::get_pixel_format()
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{
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return this->_format;
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}
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void avframe_queue::precache(size_t count)
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{
for (size_t n = 0; n < count; n++) {
push(create_frame());
}
}
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void avframe_queue::clear()
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{
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std::unique_lock<std::mutex> ulock(this->_lock);
_frames.clear();
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}
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void avframe_queue::push(std::shared_ptr<AVFrame> const frame)
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{
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std::unique_lock<std::mutex> ulock(this->_lock);
_frames.push_back(frame);
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}
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std::shared_ptr<AVFrame> avframe_queue::pop()
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{
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std::unique_lock<std::mutex> ulock(this->_lock);
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std::shared_ptr<AVFrame> ret;
while (ret == nullptr) {
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if (_frames.size() == 0) {
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ret = create_frame();
} else {
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ret = _frames.front();
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if (ret == nullptr) {
ret = create_frame();
} else {
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_frames.pop_front();
if ((static_cast<uint32_t>(ret->width) != this->_resolution.first)
|| (static_cast<uint32_t>(ret->height) != this->_resolution.second)
|| (ret->format != this->_format)) {
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ret = nullptr;
}
}
}
}
return ret;
}
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std::shared_ptr<AVFrame> avframe_queue::pop_only()
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{
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std::unique_lock<std::mutex> ulock(this->_lock);
if (_frames.size() == 0) {
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return nullptr;
}
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std::shared_ptr<AVFrame> ret = _frames.front();
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if (ret == nullptr) {
return nullptr;
}
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_frames.pop_front();
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return ret;
}
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bool avframe_queue::empty()
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{
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return _frames.empty();
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}
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size_t avframe_queue::size()
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{
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return _frames.size();
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}