RT-Thread Smart基于 FFmpeg + SDL2 在 ART-Pi Smart 平台上视频播放. - 谷动谷力

git clone https://code.videolan.org/videolan/x264.git

复制代码

#include <stdio.h>
#include <SDL.h>
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
extern Uint32 rtt_screen_width;
extern Uint32 rtt_screen_heigth;
int main (int argc, char *argv[])
{
int ret = -1;
AVFormatContext *pFormatCtx = NULL;
int videoStream;
AVCodecParameters *pCodecParameters = NULL;
AVCodecContext *pCodecCtx = NULL;
AVCodec *pCodec = NULL;
AVFrame *pFrame = NULL;
AVPacket packet;
SDL_Rect rect;
SDL_Window *win = NULL;
SDL_Renderer *renderer = NULL;
SDL_Texture *texture = NULL;
if(( argc != 2 ))
{
printf("error input arguments!\n");
return(1);
}
// 默认窗口大小
int w_width = rtt_screen_width;
int w_height = rtt_screen_heigth;
// use dummy video driver
SDL_setenv("SDL_VIDEODRIVER","rtt",1);
//Initialize SDL
if( SDL_Init( SDL_INIT_VIDEO ) < 0 )
{
printf( "SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
return -1;
}
// 打开输入文件
if (avformat_open_input(&pFormatCtx, argv[1], NULL, NULL) != 0)
{
printf("Couldn't open video file!: %s\n", argv[1]);
goto __exit;
}
// 找到视频流
videoStream = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
if (videoStream == -1)
{
printf("Din't find a video stream!\n");
goto __exit;// Didn't find a video stream
}
// 流参数
pCodecParameters = pFormatCtx->streams[videoStream]->codecpar;
// 获取解码器
pCodec = avcodec_find_decoder(pCodecParameters->codec_id);
if (pCodec == NULL)
{
printf("Unsupported codec!\n");
goto __exit; // Codec not found
}
// 初始化一个编解码上下文
pCodecCtx = avcodec_alloc_context3(pCodec);
if (avcodec_parameters_to_context(pCodecCtx, pCodecParameters) != 0)
{
printf("Couldn't copy codec context\n");
goto __exit;// Error copying codec context
}
// 打开解码器
if (avcodec_open2(pCodecCtx, pCodec, NULL) < 0)
{
printf("Failed to open decoder!\n");
goto __exit; // Could not open codec
}
// Allocate video frame
pFrame = av_frame_alloc();
w_width = pCodecCtx->width;
w_height = pCodecCtx->height;
// 创建窗口
win = SDL_CreateWindow("Media Player",
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
w_width, w_height,
SDL_WINDOW_SHOWN );
if (!win)
{
printf("Failed to create window by SDL\n");
goto __exit;
}
// 创建渲染器
renderer = SDL_CreateRenderer(win, -1, 0);
if (!renderer)
{
printf("Failed to create Renderer by SDL\n");
goto __exit;
}
// 创建纹理
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_IYUV,
SDL_TEXTUREACCESS_STREAMING,
w_width,
w_height);
// 读取数据
while (av_read_frame(pFormatCtx, &packet) >= 0)
{
if (packet.stream_index == videoStream)
{
// 解码
avcodec_send_packet(pCodecCtx, &packet);
while (avcodec_receive_frame(pCodecCtx, pFrame) == 0)
{
SDL_UpdateYUVTexture(texture, NULL,
pFrame->data[0], pFrame->linesize[0],
pFrame->data[1], pFrame->linesize[1],
pFrame->data[2], pFrame->linesize[2]);
// set size of Window
rect.x = 0;
rect.y = 0;
rect.w = pCodecCtx->width;
rect.h = pCodecCtx->height;
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, &rect);
SDL_RenderPresent(renderer);
}
}
av_packet_unref(&packet);
}
__exit:
if (pFrame)
{
av_frame_free(&pFrame);
}
if (pCodecCtx)
{
avcodec_close(pCodecCtx);
}
if (pCodecParameters)
{
avcodec_parameters_free(&pCodecParameters);
}
if (pFormatCtx)
{
avformat_close_input(&pFormatCtx);
}
if (win)
{
SDL_DestroyWindow(win);
}
if (renderer)
{
SDL_DestroyRenderer(renderer);
}
if (texture)
{
SDL_DestroyTexture(texture);
}
SDL_Quit();
return ret;
}

复制代码

git clone https://github.com/liukangcc/ART-Pi-Smart.git

复制代码