#include "decoder.hpp"
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#include "../ffmpeg/bridge/cvbridge.hpp"
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#include "../ffmpeg/format/FormatIn.hpp"
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#include "../ffmpeg/data/CodedData.hpp"
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#include "../ffmpeg/log/log.hpp"
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#include "../common.hpp"
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extern "C"{
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#include <libavformat/avformat.h>
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#include <libavutil/opt.h>
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#include <libswscale/swscale.h>
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#include <libavcodec/avcodec.h>
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}
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using namespace ffwrapper;
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using namespace logif;
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namespace cffmpeg_wrap
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{
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decoder::decoder(ffwrapper::FormatIn *dec)
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:decRef_(dec)
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{}
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decoder::~decoder(){
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std::lock_guard<std::mutex> l(mutex_frm_);
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for(auto i : list_frm_){
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if (i.avframe)
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av_frame_free(&i.avframe);
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}
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list_frm_.clear();
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}
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int decoder::initDecoder(){
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if (!decRef_) return -1;
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if(decRef_->getCodecContext() == NULL){
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bool flag = true;
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flag = decRef_->openCodec(NULL);
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if (!flag){
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logIt("FormatIn openCodec Failed!");
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return -1;
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}
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}
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return 0;
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}
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int decoder::SetFrame(const CPacket &pkt){
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auto data = pkt.data;
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if (!data) return -10;
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if (!decRef_->isVideoPkt(&data->getAVPacket())) return -20;
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if (decRef_->getCodecContext() == NULL){
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if (initDecoder() != 0) return -30;
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}
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AVFrame *frame = av_frame_alloc();
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AVPacket np(data->getAVPacket());
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av_copy_packet(&np, &data->getAVPacket());
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auto ret = decRef_->decode(frame, &np);
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av_packet_unref(&np);
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if (ret == 0){
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return saveFrame(frame, pkt.v_id);
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}
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return ret;
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}
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void decoder::GetFrame(unsigned char **data, int *w, int *h, int *format, int *length, int64_t *id){
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FRM frm;
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{
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std::lock_guard<std::mutex> l(mutex_frm_);
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if(list_frm_.empty()){
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return;
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}
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frm = list_frm_.front();
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list_frm_.pop_front();
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}
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AVFrame *frame = frm.avframe;
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int pix_fmt = frame->format;
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uint8_t *origin = cvbridge::extractFrame(frame, &frm.length);
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av_frame_free(&frame);
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if (!origin) return;
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uint8_t *finale = NULL;
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if (pix_fmt != AV_PIX_FMT_NV12){
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finale = (uint8_t*)malloc(frm.length);
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unsigned char* SrcU = origin + frm.width * frm.height;
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unsigned char* SrcV = SrcU + frm.width * frm.height / 4 ;
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unsigned char* DstU = finale + frm.width * frm.height;
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memcpy(finale, origin, frm.width * frm.height);
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int i = 0;
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for( i = 0 ; i < frm.width * frm.height / 4 ; i++ ){
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*(DstU++) = *(SrcU++);
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*(DstU++) = *(SrcV++);
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}
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free(origin);
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}else{
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finale = origin;
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}
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*data = finale;
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*id = frm.id;
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*w = frm.width;
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*h = frm.height;
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*format = pix_fmt;
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*length = frm.length;
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}
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////////////////////////////////////////////////////////////////////////
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static const int maxSize = 5;
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int decoder::saveFrame(AVFrame *frame, const int64_t &id){
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FRM frm;
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frm.avframe = frame;
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frm.width = frame->width;
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frm.height = frame->height;
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frm.id = id;
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std::lock_guard<std::mutex> l(mutex_frm_);
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while(list_frm_.size() > maxSize){
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for(int i = 0; i < (maxSize>1); i++){
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auto t = list_frm_.front();
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av_frame_free(&t.avframe);
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list_frm_.pop_front();
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}
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}
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list_frm_.push_back(frm);
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return list_frm_.size();
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}
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} // namespace cffmpeg_wrap
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