解封装_播放

#include 
#include 
#include "xvideo_view.h"
#include "xdecode.h"
 
using namespace std;
 
extern "C"{
	//引用ffmpeg头文件
	#include 
}
//预处理治理导入库
#pragma comment(lib, "avformat.lib")
#pragma comment(lib, "avutil.lib")
#pragma comment(lib, "avcodec.lib")
 
 
 
#define CERR(err) if (err)						\
					{							\
						PrintErr(err);			\
						return -1;				\
					}
 
int main(int argc, char* argv[])
{
	//打开媒体文件
	const char* url = "v1080.mp4";
	//解封装上下文
	AVFormatContext* ic = nullptr;
	int re = avformat_open_input(&ic, url, 
		NULL,		//封装器格式，NULL表示自动探测  根据后缀面或者文件头
		NULL		//	参数设置，rtsp需要设置
	);
	CERR(re);
 
	//获取媒体信息，无头部格式
	avformat_find_stream_info(ic, NULL);
	CERR(re);
 
	//打印封装信息
	av_dump_format(ic,1, url, 
		0			//0表示上下文是输入， 1表示上下文是输出
	);
 
	AVStream* as = nullptr;
	AVStream* vs = nullptr;
 
	for (int i = 0; i < ic->nb_streams; i++)
	{
		if (ic->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
		{
			as = ic->streams[i];
			cout << "========音频=======" << endl;
			cout << "sample_rate:" << as->codecpar->sample_rate << endl;
			
		}
		else if (ic->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
		{
			vs = ic->streams[i];
			cout << "========视频=======" << endl;
			cout << "width:" << vs->codecpar->width << endl;
			cout << "height:" << vs->codecpar->height << endl;
		}
	}
 
	
	
	auto video_codec_id = vs->codecpar->codec_id;		//视频编码器ID
	AVCodecParameters* video_par = vs->codecpar;		//视频编码参数
	///
	///视频解码器初始化
	XDecode decode;
	AVCodecContext* decode_c = XCodec::Create(video_codec_id, false);
	//解封装的视频编码参数，传递给解码上下文
	avcodec_parameters_to_context(decode_c, video_par);
 
	//设置到解码器中，线程安全，设置完后， decode_c 不在类外部使用
	decode.set_c(decode_c);
	if (!decode.Open())
	{
		cout << "decode.Open() error" << endl;
		return -1;
	}
 
	//创建解码输出的空间
	AVFrame* frame = decode.CreateFrame();
	//
 
	//
	///渲染初始化
	//
	XVideoView* view = XVideoView::Create();
	view->Init(video_par->width, video_par->height, (XVideoView::Format)video_par->format);
	
	AVPacket pkt;
	for (;;)
	{
		re = av_read_frame(ic, &pkt);
		CERR(re);
		if (vs && pkt.stream_index == vs->index)
		{
			cout << "视频:" ;
			//解码视频
			if (decode.Send(&pkt))
			{
				while (decode.Recv(frame))
				{
					cout << frame->pts << " " << flush;
					view->DrawFrame(frame);	//渲染
				}
			}
		}
		else if (as && pkt.stream_index == as->index)
		{
			//cout << "音频:";
		}
 
		//cout << pkt.pts << ":" << pkt.dts << ":" << pkt.size << endl;
 
		av_packet_unref(&pkt);
		//this_thread::sleep_for(100ms);
	}
 
 
 
	av_frame_free(&frame);
	avformat_close_input(&ic);
	return 0;
}