ZLMediaKit/tests/H264Decoder.h
2017-05-08 18:03:43 +08:00

85 lines
1.8 KiB
C++

/*
* H264Decoder.h
*
* Created on: 2016年12月21日
* Author: xzl
*/
#ifndef H264Decoder_H_
#define H264Decoder_H_
#include <string>
#include <memory>
#include <stdexcept>
#ifdef __cplusplus
extern "C" {
#endif
//#include "libavutil/mathematics.h"
#include "libavcodec/avcodec.h"
//#include "libswscale/swscale.h"
#ifdef __cplusplus
}
#endif
using namespace std;
namespace ZL {
namespace Codec {
class H264Decoder
{
public:
H264Decoder(void){
avcodec_register_all();
AVCodec *pCodec = avcodec_find_decoder(CODEC_ID_H264);
if (!pCodec) {
throw std::runtime_error("未找到H264解码器");
}
m_pContext.reset(avcodec_alloc_context3(pCodec), [](AVCodecContext *pCtx) {
avcodec_close(pCtx);
avcodec_free_context(&pCtx);
});
if (!m_pContext) {
throw std::runtime_error("创建解码器失败");
}
if (pCodec->capabilities & CODEC_CAP_TRUNCATED) {
/* we do not send complete frames */
m_pContext->flags |= CODEC_FLAG_TRUNCATED;
}
if(avcodec_open2(m_pContext.get(), pCodec, NULL)< 0){
throw std::runtime_error("打开编码器失败");
}
m_pFrame.reset(av_frame_alloc(),[](AVFrame *pFrame){
av_frame_free(&pFrame);
});
if (!m_pFrame) {
throw std::runtime_error("创建帧缓存失败");
}
}
virtual ~H264Decoder(void){}
bool inputVideo(unsigned char* data,unsigned int dataSize,uint32_t ui32Stamp,AVFrame **ppFrame){
AVPacket pkt;
av_init_packet(&pkt);
pkt.data = data;
pkt.size = dataSize;
pkt.dts = ui32Stamp;
int iGotPicture ;
auto iLen = avcodec_decode_video2(m_pContext.get(), m_pFrame.get(), &iGotPicture, &pkt);
if (!iGotPicture || iLen < 0) {
return false;
}
*ppFrame = m_pFrame.get();
return true;
}
private:
std::shared_ptr<AVCodecContext> m_pContext;
std::shared_ptr<AVFrame> m_pFrame;
};
} /* namespace Codec */
} /* namespace ZL */
#endif /* H264Decoder_H_ */