1.6 ffmpeg 简单视频播放器

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所属分类:安卓 音视频

vs代码:

/**
* 最简单的基于FFmpeg的视频播放器2(SDL升级版)
* 本程序实现了视频文件的解码和显示(支持HEVC,H.264,MPEG2等)。
* 是最简单的FFmpeg视频解码方面的教程。
* 通过学习本例子可以了解FFmpeg的解码流程。
* 本版本中使用SDL消息机制刷新视频画面。
* This software is a simplest video player based on FFmpeg.
* Suitable for beginner of FFmpeg.
*
*/

#include <stdio.h>

#define __STDC_CONSTANT_MACROS

extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "SDL2/SDL.h"
};

//Refresh Event
#define SFM_REFRESH_EVENT (SDL_USEREVENT + 1)

#define SFM_BREAK_EVENT (SDL_USEREVENT + 2)

int thread_exit=0;

int sfp_refresh_thread(void *opaque){
thread_exit=0;
while (!thread_exit) {
SDL_Event event;
event.type = SFM_REFRESH_EVENT;
SDL_PushEvent(&event);
SDL_Delay(40);
}
thread_exit=0;
//Break
SDL_Event event;
event.type = SFM_BREAK_EVENT;
SDL_PushEvent(&event);

return 0;
}

int main(int argc, char* argv[])
{

AVFormatContext *pFormatCtx;
int i, videoindex;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame,*pFrameYUV;
uint8_t *out_buffer;
AVPacket *packet;
int ret, got_picture;

//------------SDL----------------
int screen_w,screen_h;
SDL_Window *screen;
SDL_Renderer* sdlRenderer;
SDL_Texture* sdlTexture;
SDL_Rect sdlRect;
SDL_Thread *video_tid;
SDL_Event event;

struct SwsContext *img_convert_ctx;

char filepath[]="屌丝男士.mov";

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;
}
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_open2(pCodecCtx, pCodec,NULL)<0){
printf("Could not open codec.\n");
return -1;
}
pFrame=av_frame_alloc();
pFrameYUV=av_frame_alloc();
out_buffer=(uint8_t *)av_malloc(avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height));
avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);

img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt,
pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);

if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER)) {
printf( "Could not initialize SDL - %s\n", SDL_GetError());
return -1;
}
//SDL 2.0 Support for multiple windows
screen_w = pCodecCtx->width;
screen_h = pCodecCtx->height;
screen = SDL_CreateWindow("Simplest ffmpeg player's Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
screen_w, screen_h,SDL_WINDOW_OPENGL);

if(!screen) {
printf("SDL: could not create window - exiting:%s\n",SDL_GetError());
return -1;
}
sdlRenderer = SDL_CreateRenderer(screen, -1, 0);
//IYUV: Y + U + V (3 planes)
//YV12: Y + V + U (3 planes)
sdlTexture = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING,pCodecCtx->width,pCodecCtx->height);

sdlRect.x=0;
sdlRect.y=0;
sdlRect.w=screen_w;
sdlRect.h=screen_h;

packet=(AVPacket *)av_malloc(sizeof(AVPacket));

video_tid = SDL_CreateThread(sfp_refresh_thread,NULL,NULL);
//------------SDL End------------
//Event Loop

for (;;) {
//Wait
SDL_WaitEvent(&event);
if(event.type==SFM_REFRESH_EVENT){
//------------------------------
if(av_read_frame(pFormatCtx, packet)>=0){
if(packet->stream_index==videoindex){
ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
if(ret < 0){
printf("Decode Error.\n");
return -1;
}
if(got_picture){
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
//SDL---------------------------
SDL_UpdateTexture( sdlTexture, NULL, pFrameYUV->data[0], pFrameYUV->linesize[0] );
SDL_RenderClear( sdlRenderer );
//SDL_RenderCopy( sdlRenderer, sdlTexture, &sdlRect, &sdlRect );
SDL_RenderCopy( sdlRenderer, sdlTexture, NULL, NULL);
SDL_RenderPresent( sdlRenderer );
//SDL End-----------------------
}
}
av_free_packet(packet);
}else{
//Exit Thread
thread_exit=1;
}
}else if(event.type==SDL_QUIT){
thread_exit=1;
}else if(event.type==SFM_BREAK_EVENT){
break;
}

}

sws_freeContext(img_convert_ctx);

SDL_Quit();
//--------------
av_frame_free(&pFrameYUV);
av_frame_free(&pFrame);
avcodec_close(pCodecCtx);
avformat_close_input(&pFormatCtx);

return 0;
}

 

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Android 音视频学习基础--1.5 ffmpeg yuv输出
Android 音视频学习基础--1.6 ffmpeg 简单视频播放器
Android 音视频学习基础--1.7 Android最简单的音频播放器
Android 音视频学习基础--1.8 Android最简单的音频播放器
Android 音视频学习基础--1.9 Android最简单的视频播放器
Android 音视频学习基础--1.10 Android自制简单音视频播放器

 

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