mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 03:10:04 +08:00
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
/*
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* YuvDisplayer.h
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*
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* Created on: 2016年12月21日
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* Author: xzl
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*/
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#ifndef YUVDISPLAYER_H_
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#define YUVDISPLAYER_H_
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#include <stdexcept>
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#include "Util/onceToken.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <SDL/SDL.h>
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#include <libavcodec/avcodec.h>
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#ifdef __cplusplus
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}
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#endif
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namespace ZL {
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namespace Screen {
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class YuvDisplayer {
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public:
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YuvDisplayer(){
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static onceToken token([]() {
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if(SDL_Init(SDL_INIT_EVERYTHING) == -1) {
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throw std::runtime_error("初始化SDL失败");
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}
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}, []() {
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SDL_Quit();
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});
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}
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virtual ~YuvDisplayer(){
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if(m_pOverlay){
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SDL_FreeYUVOverlay(m_pOverlay);
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}
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}
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bool displayYUV(AVFrame *pFrame){
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if (!m_pScreen) {
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/* Set up the screen */
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m_pScreen = SDL_SetVideoMode(1366, 768, 16, SDL_SWSURFACE);
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}
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if (!m_pOverlay && m_pScreen) {
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/* Create a YUV overlay */
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m_pOverlay = SDL_CreateYUVOverlay(pFrame->width, pFrame->height, SDL_YV12_OVERLAY, m_pScreen);
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/* Set the window caption */
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SDL_WM_SetCaption("YUV Window", NULL);
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}
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if (m_pOverlay) {
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/* Apply the image to the screen */
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m_pOverlay->pixels[0] = pFrame->data[0];
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m_pOverlay->pixels[2] = pFrame->data[1];
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m_pOverlay->pixels[1] = pFrame->data[2];
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m_pOverlay->pitches[0] = pFrame->linesize[0];
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m_pOverlay->pitches[2] = pFrame->linesize[1];
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m_pOverlay->pitches[1] = pFrame->linesize[2];
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/* Update the screen */
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SDL_Rect rect = { 0 ,0 ,1366,768};
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SDL_LockYUVOverlay(m_pOverlay);
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SDL_DisplayYUVOverlay(m_pOverlay, &rect);
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SDL_UnlockYUVOverlay(m_pOverlay);
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return true;
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}
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return false;
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}
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private:
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SDL_Surface* m_pScreen = nullptr;
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SDL_Overlay* m_pOverlay = nullptr;
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};
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} /* namespace Screen */
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} /* namespace ZL */
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#endif /* YUVDISPLAYER_H_ */
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