#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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,next_idx_(-1)
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{}
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decoder::~decoder(){
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std::lock_guard<std::mutex> l(mutex_pkt_);
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list_pkt_.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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std::lock_guard<std::mutex> l(mutex_pkt_);
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if (data->getAVPacket().flags & AV_PKT_FLAG_KEY){
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logIt("new list cpacket start, next %lld, cur %lld", next_idx_, pkt.id);
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list_pkt_.clear();
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}
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list_pkt_.push_back(pkt);
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return list_pkt_.size();
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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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AVFrame *frame = NULL;
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{
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std::lock_guard<std::mutex> l(mutex_pkt_);
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if (list_pkt_.empty()) return;
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auto check = list_pkt_.front();
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if (check.id > next_idx_){
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next_idx_ = -1;
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logIt("decoder new list cpacket");
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}
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for (auto &i : list_pkt_){
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if (i.id < next_idx_){
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continue;
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logIt("decoder same list cpacket");
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}
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*id = i.v_id;
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auto data = i.data;
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AVFrame *frm = 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(frm, &np);
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av_packet_unref(&np);
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if (ret == 0){
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next_idx_ = i.id + 1;
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if (frame) {av_frame_free(&frame); frame = NULL;}
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frame = frm;
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}
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}
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}
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if (!frame) return;
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int pix_fmt = frame->format;
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int width = frame->width;
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int height = frame->height;
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int len = 0;
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uint8_t *origin = cvbridge::extractFrame(frame, &len);
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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(len);
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unsigned char* SrcU = origin + width * height;
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unsigned char* SrcV = SrcU + width * height / 4 ;
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unsigned char* DstU = finale + width * height;
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memcpy(finale, origin, width * height);
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int i = 0;
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for( i = 0 ; i < width * 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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*w = width;
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*h = height;
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*format = pix_fmt;
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*length = len;
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}
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} // namespace cffmpeg_wrap
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