Implementing Linux player with FFmpeg and SDL2

One, version 1

#include  <stdio.h> #include  <libavcodec/avcodec.h>   #include  < libavformat/avformat.h>   #include  <libswscale/swscale.h>  #include  < libavutil/imgutils.h>  #include  <sdl2/sdl.h>int main (int argc, char * Argv[]) {    char filepath[] =  "/home/lvzg/videos/a.ts";     int videoIndex = -1, i;    int ret;     int gotpicture;    struct swscontext *swsconvertctx;     AVFormatContext *pFormatCtx;    AVCodecContext  *pCodecCtx;     AVCodec         *pCodec;     AVFrame         *pFrame,*pFrameYUV;     avpacket        *packet;    unsigned char   *outBuffer;     unsigned int     outbuffersize;     sdl_window       *sdlscreen;    sdl_renderer    * sdlrenderer;    sdl_texture     *sdltexture;     sdl_rect         sdlrect;    av_ Register_all ();  avformat_network_init ();      pformatctx =  Avformat_alloc_context ();     if (Avformat_open_input (&pFormatCtx, filePath,  Null, null)  != 0) {          printf ("Couldn ' t  open input stream.\n ");        return -1;       }     if (Avformat_find_stream_info (pformatctx,null)  < 0) {           printf ("couldn ' t find stream information.\n");           return -1;      }     for (i = 0; i < pformatctx->nb_streams; i++) {         if (Pformatctx->streams[i]->codec->codec_type == avmedia _type_video) {            videoindex = i;             break;         }    }    if (videoindex == -1) {         printf ("didn ' t find a video stream.\n");      &nbSp;    return -1;     }    pcodecctx  = pformatctx->streams[videoindex]->codec;    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;      }    pframe = av_frame_ Alloc ();     pframeyuv = av_frame_alloc ();     outbuffersize  = avpicture_get_size (AV_pix_fmt_yuv420p, pcodecctx->width, pcodecctx->height);     outbuffer  =  (unsigned char *) Av_malloc (outbuffersize);     avpicture_fill ( avpicture *) pframeyuv, outbuffer, av_pix_fmt_yuv420p, pcodecctx->width, pcodecctx- >height); packet =  (avpacket*) av_malloc (sizeof (avpacket)); swsconvertctx =  Sws_getcontext (        pcodecctx->width, pcodecctx->height,  pCodecCtx->pix_fmt,        pCodecCtx->width,  Pcodecctx->height, av_pix_fmt_yuv420p,        sws_bicubic,  null, null, null);     if (Swsconvertctx == null) {         goto AV_CLEAN;    }         // sdl iniT    if (Sdl_init (Sdl_init_video | sdl_init_audio | sdl_init_timer)) {           printf (  "could not initialize  Sdl - %s\n ",  sdl_geterror ());        return -1;     }    sdlscreen = sdl_createwindow ("Linux Media  player ",         sdl_windowpos_undefined, sdl_windowpos_ undefined,  pcodecctx->width, pcodecctx->height,           sdl_window_opengl | sdl_window_resizable);     if (! Sdlscreen)  {          printf ("SDL_CreateWindow  failed.\n ");          return -1;     }    sdlrenderer&Nbsp;= sdl_createrenderer (sdlscreen, -1, 0);     sdltexture = sdl_ CreateTexture (Sdlrenderer, sdl_pixelformat_yv12,        sdl_ Textureaccess_streaming, pcodecctx->width, pcodecctx->height); sdlRect.x = 0;     sdlRect.y = 0;    sdlRect.w = pCodecCtx-> Width;    sdlrect.h = pcodecctx->height;    while (Av_read _frame (pformatctx, packet)  >= 0) {        if (packet- >stream_index == videoindex) {             ret = avcodec_decode_video2 (Pcodecctx, pframe, &gotpicture, packet);             if (ret < 0) {                 printf ("decode error\n");                 return -1;             }             if (gotpicture) {                 sws_scale (swsconvertctx,                       (const unsigned char *  const *) pframe->data, pframe->linesize, 0, pcodecctx->height,                      (const  unsigned char * const *) pframeyuv->data, pframeyuv->linesize);                  sdl_updateyuvtexture (Sdltexture, &sdlrect,                      pFrameYUV->data[0], pFrameYUV->linesize[0],                     pFrameYUV->data[1],  pframeyuv->linesize[1],               &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;PFRAMEYUV-&GT;DATA[2],&NBSP;PFRAMEYUV-&GT;LINESIZE[2]);                 sdl_renderclear (SdlRenderer);                 sdl_rendercopy (Sdlrenderer, sdltexture, null, &sdlrect);             &nbSp;   sdl_renderpresent (Sdlrenderer);                 sdl_delay (+);             }        }         av_free_packet (packet);     }        sws_ Freecontext (SWSCONVERTCTX);     sdl_destroytexture (sdltexture);  SDL_Quit ();     av_clean:     av_frame_free (&AMP;PFRAMEYUV);    av_ Frame_free (&pframe);     avcodec_close (PCODECCTX);     avformat_ Close_input (&pformatctx);         return 0;}

Implementing Linux player with FFmpeg and SDL2