mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-01 09:01:33 +08:00
102 lines
3.0 KiB
C++
102 lines
3.0 KiB
C++
/*
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* MIT License
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*
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* Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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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 mediakit {
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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(AV_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 & AV_CODEC_CAP_TRUNCATED) {
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/* we do not send complete frames */
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m_pContext->flags |= AV_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 mediakit */
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#endif /* H264Decoder_H_ */
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