QT ffmpeg 播放器

来源：互联网发布：java httpclient 详解编辑：程序博客网时间：2024/05/21 11:24

1.下载sdl2，ffmpeg dev

2.qt的配置

win32: LIBS += -L$$PWD/libffmpeg/lib/ -lavcodec -lavdevice -lavfilter -lavformat -lavutil -lpostproc -lswscalewin32: LIBS += -L$$PWD/libSDL/lib/x86/ -lSDL2 -lSDL2mainINCLUDEPATH += $$PWD/libffmpeg/includeDEPENDPATH += $$PWD/libffmpeg/includeINCLUDEPATH += $$PWD/libSDL/includeDEPENDPATH += $$PWD/libSDL/include

3.类接口源码（参考了雷博士的源码）

#ifndef VIDEOPLAYER_H#define VIDEOPLAYER_H#ifdef _WIN32//Windowsextern "C"{#include "libavcodec/avcodec.h"#include "libavformat/avformat.h"#include "libswscale/swscale.h"#include "SDL.h"};#else//Linux...#ifdef __cplusplusextern "C"{#endif#include <libavcodec/avcodec.h>#include <libavformat/avformat.h>#include <libswscale/swscale.h>#include <SDL2/SDL.h>#ifdef __cplusplus};#endif#endifclass VideoPlayer{public:    VideoPlayer(void* hwnd);    ~VideoPlayer();    //init ffmpeg SDL    static int StaticInit();    //crate videoplayer    static VideoPlayer * CreateNew(void *hwnd);    //    int OpenVideo(const char * videopath);    //    int Play();    //    int Stop();    //    int Pause();    //    int Continue();    void test();public:    static bool IsStaticInit;    AVFormatContext*pFormatCtx;    AVCodecContext*pCodecCtx;    int             videoindex;    //--------------SDL---------    SDL_Texture* sdlTexture;    SDL_Renderer* sdlRenderer;    bool             fPause;    bool            fEndThread;private:    uint8_t *out_buffer;    //AVPacket *packet;    //------------SDL----------------    int screen_w, screen_h;    SDL_Window *screen;    SDL_Rect sdlRect;    SDL_Thread *video_tid;    SDL_Event event;    char  fVideoPath[512];    void * fHwnd;};#endif // VIDEOPLAYER_H

#include "videoplayer.h"#include <QDebug>bool VideoPlayer::IsStaticInit = false;int video_refresh_thread(void *opaque){    VideoPlayer *vplayer = (VideoPlayer*)opaque;    if(vplayer == NULL){        return 0;    }    AVPacket * packet = (AVPacket *)av_malloc(sizeof(AVPacket));    AVFrame*pFrame, *pFrameYUV;    int ret, got_picture;    struct SwsContext *img_convert_ctx;    uint8_t *out_buffer;    pFrame = av_frame_alloc();    pFrameYUV = av_frame_alloc();    out_buffer = (uint8_t *)av_malloc(avpicture_get_size(AV_PIX_FMT_YUV420P, vplayer->pCodecCtx->width, vplayer->pCodecCtx->height));    avpicture_fill((AVPicture *)pFrameYUV, out_buffer, AV_PIX_FMT_YUV420P, vplayer->pCodecCtx->width, vplayer->pCodecCtx->height);    img_convert_ctx = sws_getContext(vplayer->pCodecCtx->width, vplayer->pCodecCtx->height, vplayer->pCodecCtx->pix_fmt, vplayer->pCodecCtx->width,vplayer-> pCodecCtx->height, AV_PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);    while(!vplayer->fEndThread){        if(!vplayer->fPause){            if (av_read_frame(vplayer->pFormatCtx, packet) >= 0) {                if (packet->stream_index == vplayer->videoindex) {                    ret = avcodec_decode_video2(vplayer->pCodecCtx, pFrame, &got_picture, packet);                    if (ret < 0) {                        printf("Decode Error.\n");                        break;                    }                    if (got_picture) {                        sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, vplayer->pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);                        //SDL---------------------------                        SDL_UpdateTexture(vplayer->sdlTexture, NULL, pFrameYUV->data[0], pFrameYUV->linesize[0]);                        SDL_RenderClear(vplayer->sdlRenderer);                        //SDL_RenderCopy( sdlRenderer, sdlTexture, &sdlRect, &sdlRect );                        SDL_RenderCopy(vplayer->sdlRenderer, vplayer->sdlTexture, NULL, NULL);                        SDL_RenderPresent(vplayer->sdlRenderer);                        //SDL End-----------------------                    }                }                av_free_packet(packet);            }else{                break;            }        }        SDL_Delay(40);    }    if(vplayer->sdlRenderer)        SDL_RenderClear(vplayer->sdlRenderer);    sws_freeContext(img_convert_ctx);    av_frame_free(&pFrameYUV);    av_frame_free(&pFrame);    vplayer->fEndThread = false;    vplayer->fPause = false;    return 0;}VideoPlayer::VideoPlayer(void *hwnd):    fHwnd(hwnd),pFormatCtx(NULL),pCodecCtx(NULL),sdlRenderer(NULL),    sdlTexture(NULL),video_tid(NULL),fPause(false),fEndThread(false){    //03.申请context内存    pFormatCtx = avformat_alloc_context();}VideoPlayer::~VideoPlayer(){    SDL_Quit();    Stop();}int VideoPlayer::StaticInit(){    if(IsStaticInit){        return 0;    }    IsStaticInit = true;    //00.初始化SDL 视频、音频、定时器    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {        printf("Could not initialize SDL - %s\n", SDL_GetError());        return -1;    }    //01.ffpeg初始化    av_register_all();    //02.网络初始化    return avformat_network_init();}int VideoPlayer::OpenVideo(const char *videopath){    strcpy(fVideoPath, videopath);    return 0;}int VideoPlayer::Play(){    //04.打开视频    if (avformat_open_input(&pFormatCtx, fVideoPath, NULL, NULL) != 0) {        printf("Couldn't open input stream.\n");        return -1;    }    //05.获取视频信息    if (avformat_find_stream_info(pFormatCtx, NULL) < 0) {        printf("Couldn't find stream information.\n");        return -1;    }    //06.获取视频流的序号    videoindex = -1;    for (unsigned int i = 0; i < pFormatCtx->nb_streams; i++)        if (pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {            videoindex = i;            break;        }    //07.是否存在视频流    if (videoindex == -1) {        printf("Didn't find a video stream.\n");        return -1;    }    //08.视频编码方式    pCodecCtx = pFormatCtx->streams[videoindex]->codec;    AVCodec*pCodec;    pCodec = avcodec_find_decoder(pCodecCtx->codec_id);    if (pCodec == NULL) {        printf("Codec not found.\n");        return -1;    }    if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {        printf("Could not open codec.\n");        return -1;    }    //09.创建渲染器和纹理    sdlRenderer = SDL_CreateRenderer(screen, -1, 0);    sdlTexture = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING, pCodecCtx->width, pCodecCtx->height);    video_tid = SDL_CreateThread(video_refresh_thread, NULL, (void*)this);    return 0;}int VideoPlayer::Stop(){    if(video_tid){        fEndThread = true;        SDL_WaitThread(video_tid, NULL);        video_tid = NULL;        fEndThread = false;    }    if(sdlTexture){        SDL_DestroyTexture(sdlTexture);        sdlTexture = NULL;    }    if(sdlRenderer){        SDL_RenderClear(sdlRenderer);        SDL_DestroyRenderer(sdlRenderer);        sdlRenderer = NULL;    }    if(pCodecCtx){        avcodec_close(pCodecCtx);        pCodecCtx = NULL;    }    if(pFormatCtx){        avformat_close_input(&pFormatCtx);        pFormatCtx = NULL;    }    return 0;}int VideoPlayer::Pause(){    fPause = true;    return 0;}int VideoPlayer::Continue(){    fPause = false;    return 0;}void VideoPlayer::test(){    SDL_Surface *sur = SDL_GetWindowSurface(screen);    ;    SDL_BlitSurface( SDL_LoadBMP("d:/123.bmp") , NULL ,sur ,NULL);    SDL_UpdateWindowSurface(screen);//更新显示copy the window surface to the screen}VideoPlayer *VideoPlayer::CreateNew(void * hwnd){    SDL_Window *screen = SDL_CreateWindowFrom(hwnd);    if(screen){        VideoPlayer *vplayer = new VideoPlayer(hwnd);        vplayer->screen = screen;        return vplayer;    }else{        qDebug()<<SDL_GetError();        return NULL;    }}

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