mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-22 19:00:01 +08:00
85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
/*
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* H264Decoder.h
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*
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* Created on: 2016年12月21日
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* Author: xzl
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*/
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#ifndef H264Decoder_H_
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#define H264Decoder_H_
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#include <string>
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#include <memory>
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#include <stdexcept>
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#ifdef __cplusplus
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extern "C" {
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#endif
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//#include "libavutil/mathematics.h"
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#include "libavcodec/avcodec.h"
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//#include "libswscale/swscale.h"
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#ifdef __cplusplus
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}
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#endif
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using namespace std;
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namespace ZL {
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namespace Codec {
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class H264Decoder
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{
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public:
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H264Decoder(void){
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avcodec_register_all();
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AVCodec *pCodec = avcodec_find_decoder(CODEC_ID_H264);
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if (!pCodec) {
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throw std::runtime_error("未找到H264解码器");
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}
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m_pContext.reset(avcodec_alloc_context3(pCodec), [](AVCodecContext *pCtx) {
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avcodec_close(pCtx);
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avcodec_free_context(&pCtx);
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});
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if (!m_pContext) {
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throw std::runtime_error("创建解码器失败");
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}
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if (pCodec->capabilities & CODEC_CAP_TRUNCATED) {
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/* we do not send complete frames */
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m_pContext->flags |= CODEC_FLAG_TRUNCATED;
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}
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if(avcodec_open2(m_pContext.get(), pCodec, NULL)< 0){
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throw std::runtime_error("打开编码器失败");
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}
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m_pFrame.reset(av_frame_alloc(),[](AVFrame *pFrame){
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av_frame_free(&pFrame);
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});
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if (!m_pFrame) {
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throw std::runtime_error("创建帧缓存失败");
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}
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}
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virtual ~H264Decoder(void){}
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bool inputVideo(unsigned char* data,unsigned int dataSize,uint32_t ui32Stamp,AVFrame **ppFrame){
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AVPacket pkt;
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av_init_packet(&pkt);
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pkt.data = data;
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pkt.size = dataSize;
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pkt.dts = ui32Stamp;
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int iGotPicture ;
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auto iLen = avcodec_decode_video2(m_pContext.get(), m_pFrame.get(), &iGotPicture, &pkt);
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if (!iGotPicture || iLen < 0) {
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return false;
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}
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*ppFrame = m_pFrame.get();
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return true;
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}
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private:
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std::shared_ptr<AVCodecContext> m_pContext;
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std::shared_ptr<AVFrame> m_pFrame;
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};
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} /* namespace Codec */
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} /* namespace ZL */
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#endif /* H264Decoder_H_ */
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