ffmpeg+sdl 简单播放器 MP4 AVI文件

//ffmpeg simple player // //媒资检索系统子系统 // //2013 雷霄骅 leixiaohua1020@126.com //中国传媒大学/数字电视技术 // #include "stdafx.h" #define SFM_REFRESH_EVENT (SDL_USEREVENT + 1) int thread_exit = 0; int sfp_refresh_thread(void *opaque) { while (thread_exit==0) { SDL_Event event; event.type = SFM_REFRESH_EVENT; SDL_PushEvent(&event); //Wait 40 ms SDL_Delay(40); } return 0; } FILE *fp_open; //typedef int (* io_callback)(void *opaque, uint8_t *buf, int buf_size); int fill_iobuffer(void * opaque,uint8_t *buf, int bufsize){ if(!feof(fp_open)){ int true_size=fread(buf,1,bufsize,fp_open); return true_size; }else{ printf(" bufsize is %d \n",bufsize); return -1; } } int _tmain(int argc, _TCHAR* argv[]) { #if 0 AVFormatContext *pFormatCtx; int i, videoindex; AVCodecContext *pCodecCtx; AVCodec *pCodec; char filepath[]="2.mp4"; char filepath1[]="2.mpg"; char filepath2[]="2.avi"; if(avformat_open_input(&pFormatCtx,filepath1,NULL,NULL)!=0){ printf("无法打开文件\n"); return -1; } #endif AVFormatContext *pFormatCtx; int i, videoindex; AVCodecContext *pCodecCtx; AVCodec *pCodec; AVInputFormat *avinputformat = NULL; fp_open = fopen("1.mp4","rb+"); unsigned char * iobuffer = (unsigned char *)av_malloc(327680000); AVIOContext *avio = avio_alloc_context(iobuffer,327680000,0,NULL,fill_iobuffer,NULL,NULL); // string filepath3 = "2.mpg"; av_register_all(); avformat_network_init(); pFormatCtx = avformat_alloc_context(); //pFormatCtx = NULL; //不需要avformat alloc context分配内存 程序也可以奔跑 #if 1 #if 0 //探测流的格式 if(av_probe_input_buffer(avio,&avinputformat,"",NULL,0,0)<0) { printf("探测流失败"); return -1; } pFormatCtx->flags = AVFMT_FLAG_CUSTOM_IO; #endif pFormatCtx->pb = avio; //指定了AVIOcotext 即是pb指针 if(avformat_open_input(&pFormatCtx,NULL,NULL,NULL)<0){ printf("无法打开文件\n"); return -1; } #endif #if 0 if(avformat_open_input(&pFormatCtx,"1.mp4",NULL,NULL)<0){ printf("无法打开文件\n"); return -1; } #endif if(av_find_stream_info(pFormatCtx)<0) { printf("Couldn't find stream information.\n"); return -1; } videoindex=-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"); 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_open(pCodecCtx, pCodec)<0) { printf("Could not open codec.\n"); return -1; } AVFrame *pFrame,*pFrameYUV; pFrame=avcodec_alloc_frame(); pFrameYUV=avcodec_alloc_frame(); uint8_t *out_buffer; out_buffer=new uint8_t[avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height)]; if(*out_buffer) { } avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height); //------------SDL---------------- if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) { printf( "Could not initialize SDL - %s\n", SDL_GetError()); exit(1); } SDL_Surface *screen; screen = SDL_SetVideoMode(pCodecCtx->width, pCodecCtx->height, 0, 0); if(!screen) { printf("SDL: could not set video mode - exiting\n"); exit(1); } SDL_Overlay *bmp; bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height,SDL_YV12_OVERLAY, screen); SDL_Rect rect; //--------------- int ret, got_picture; static struct SwsContext *img_convert_ctx; int y_size = pCodecCtx->width * pCodecCtx->height; AVPacket *packet=(AVPacket *)malloc(sizeof(AVPacket)); av_new_packet(packet, y_size); //输出一下信息----------------------------- printf("文件信息-----------------------------------------\n"); av_dump_format(pFormatCtx,0,"1.mp4",0); printf("-------------------------------------------------\n"); //----------------------------------------------- img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); //-------------- SDL_Thread *video_tid = SDL_CreateThread(sfp_refresh_thread,NULL); // SDL_WM_SetCaption("Simple FFmpeg Player (SDL Update)",NULL); //Event Loop SDL_Event event; for(;;) { SDL_WaitEvent(&event); if(event.type==SFM_REFRESH_EVENT) { if(av_read_frame(pFormatCtx, packet)>=0) //while改成if 起一个线程发给 { if(packet->stream_index==videoindex) { ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet); if(ret < 0) { printf("解码错误\n"); return -1; } if(got_picture) { // img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL); sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize); SDL_LockYUVOverlay(bmp); bmp->pixels[0]=pFrameYUV->data[0]; bmp->pixels[2]=pFrameYUV->data[1]; bmp->pixels[1]=pFrameYUV->data[2]; bmp->pitches[0]=pFrameYUV->linesize[0]; bmp->pitches[2]=pFrameYUV->linesize[1]; bmp->pitches[1]=pFrameYUV->linesize[2]; SDL_UnlockYUVOverlay(bmp); rect.x = 0; rect.y = 0; rect.w = pCodecCtx->width; rect.h = pCodecCtx->height; SDL_DisplayYUVOverlay(bmp, &rect); //延时40ms // SDL_Delay(40); } } av_free_packet(packet); }else { thread_exit=1; break; } } } SDL_Quit(); sws_freeContext(img_convert_ctx); delete[] out_buffer; av_free(pFrameYUV); avcodec_close(pCodecCtx); avformat_close_input(&pFormatCtx); return 0; }