ZLMediaKit/tests/YuvDisplayer.h

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/*
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* MIT License
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*
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* Copyright (c) 2017 xiongziliang <771730766@qq.com>
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*
* 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.
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*/
#ifndef YUVDISPLAYER_H_
#define YUVDISPLAYER_H_
#include <stdexcept>
#include "Util/onceToken.h"
#ifdef __cplusplus
extern "C" {
#endif
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#include "SDL2/SDL.h"
#include "libavcodec/avcodec.h"
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#ifdef __cplusplus
}
#endif
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#if defined(_WIN32)
#pragma comment(lib,"SDL2.lib")
#endif //defined(_WIN32)
using namespace ZL::Util;
#define REFRESH_EVENT (SDL_USEREVENT + 1)
class SDLDisplayerHelper
{
public:
static SDLDisplayerHelper &Instance(){
static SDLDisplayerHelper *instance(new SDLDisplayerHelper);
return *instance;
}
static void Destory(){
delete &Instance();
}
template<typename FUN>
void doTask(FUN &&f){
{
lock_guard<mutex> lck(_mtxTask);
_taskList.emplace_back(f);
}
SDL_Event event;
event.type = REFRESH_EVENT;
SDL_PushEvent(&event);
}
private:
SDLDisplayerHelper(){
_loopThread.reset(new std::thread(&SDLDisplayerHelper::runLoop,this));
};
~SDLDisplayerHelper(){
doTask([](){return false;});
_loopThread->join();
_loopThread.reset();
};
void runLoop(){
bool flag = true;
std::function<bool ()> task;
SDL_Event event;
while(flag){
SDL_WaitEvent(&event);
if (event.type == REFRESH_EVENT)
{
{
lock_guard<mutex> lck(_mtxTask);
if(_taskList.empty()){
//not reachable
continue;
}
task = _taskList.front();
_taskList.pop_front();
}
flag = task();
}
}
}
std::deque<std::function<bool ()> > _taskList;
std::shared_ptr<thread> _loopThread;
std::mutex _mtxTask;
};
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class YuvDisplayer {
public:
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YuvDisplayer(void *hwnd = nullptr,const char *title = "untitled"){
static onceToken token([]() {
if(SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO) == -1) {
string err = "初始化SDL失败:";
err+= SDL_GetError();
ErrorL << err;
throw std::runtime_error(err);
}
SDL_LogSetAllPriority(SDL_LOG_PRIORITY_CRITICAL);
SDL_LogSetOutputFunction([](void *userdata, int category, SDL_LogPriority priority, const char *message){
DebugL << category << " " << priority << message;
},nullptr);
InfoL << "SDL_Init";
}, []() {
SDLDisplayerHelper::Destory();
SDL_Quit();
});
_title = title;
_hwnd = hwnd;
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}
virtual ~YuvDisplayer(){
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if (_texture) {
SDL_DestroyTexture(_texture);
_texture = nullptr;
}
if (_render) {
SDL_DestroyRenderer(_render);
_render = nullptr;
}
if (_win) {
SDL_DestroyWindow(_win);
_win = nullptr;
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}
}
bool displayYUV(AVFrame *pFrame){
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if (!_win) {
if (_hwnd) {
_win = SDL_CreateWindowFrom(_hwnd);
}else {
_win = SDL_CreateWindow(_title.data(),
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
pFrame->width,
pFrame->height,
SDL_WINDOW_OPENGL);
}
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}
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if (_win && ! _render){
#if 0
SDL_RENDERER_SOFTWARE = 0x00000001, /**< The renderer is a software fallback */
SDL_RENDERER_ACCELERATED = 0x00000002, /**< The renderer uses hardware
acceleration */
SDL_RENDERER_PRESENTVSYNC = 0x00000004, /**< Present is synchronized
with the refresh rate */
SDL_RENDERER_TARGETTEXTURE = 0x00000008 /**< The renderer supports
rendering to texture */
#endif
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_render = SDL_CreateRenderer(_win, -1, SDL_RENDERER_ACCELERATED);
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}
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if (_render && !_texture) {
_texture = SDL_CreateTexture(_render, SDL_PIXELFORMAT_IYUV,
SDL_TEXTUREACCESS_STREAMING,
pFrame->width,
pFrame->height);
}
if (_texture) {
SDL_UpdateYUVTexture(_texture, nullptr,
pFrame->data[0], pFrame->linesize[0],
pFrame->data[1], pFrame->linesize[1],
pFrame->data[2], pFrame->linesize[2]);
//SDL_UpdateTexture(_texture, nullptr, pFrame->data[0], pFrame->linesize[0]);
SDL_RenderClear(_render);
SDL_RenderCopy(_render, _texture, nullptr, nullptr);
SDL_RenderPresent(_render);
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return true;
}
return false;
}
private:
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string _title;
SDL_Window *_win = nullptr;
SDL_Renderer *_render = nullptr;
SDL_Texture *_texture = nullptr;
void *_hwnd = nullptr;
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};
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#endif /* YUVDISPLAYER_H_ */