#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/data/FrameData.hpp"
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#include "../ffmpeg/log/log.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, const int w, const int h, const int f)
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:conv_(NULL)
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,conv_w_(w)
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,conv_h_(h)
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,conv_flag_(f)
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,decRef_(dec)
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,thread_(nullptr)
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,stop_{false}
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{}
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decoder::~decoder(){
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if (thread_){
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stop_.store(true);
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thread_->join();
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}
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if (conv_){
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delete conv_;
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}
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{
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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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{
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std::lock_guard<std::mutex> l(mutex_pic_);
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for(auto &i : list_pic_){
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free(i.data);
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}
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list_pic_.clear();
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}
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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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auto dec_ctx = decRef_->getCodecContext();
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if(conv_){
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delete conv_;
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conv_ = NULL;
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}
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conv_w_ = conv_w_ == 0 || conv_w_ > dec_ctx->width ? dec_ctx->width : conv_w_;
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conv_h_ = conv_h_ == 0 || conv_h_ > dec_ctx->height ? dec_ctx->height : conv_h_;
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AVPixelFormat pix_fmt = AV_PIX_FMT_BGR24;
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conv_ = new cvbridge(
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dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt,
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conv_w_, conv_h_, pix_fmt, conv_flag_);
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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::saveFrame(AVFrame *frame, int64_t &id){
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//缓存数据
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BGR24 pic;
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AVFrame *frm = frame;
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pic.w = conv_w_;
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pic.h = conv_h_;
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unsigned char *picData = (unsigned char*)malloc(pic.w * pic.h * 3);
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conv_->copyPicture(picData, frm);
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pic.data = picData;
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pic.id = id;
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std::lock_guard<std::mutex> l(mutex_pic_);
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while(list_pic_.size() > 50){
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for(int i = 0; i < 12; i++){
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auto t = list_pic_.front();
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free(t.data);
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list_pic_.pop_front();
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}
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}
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list_pic_.emplace_back(pic);
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return list_pic_.size();
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}
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void decoder::Start(){
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if (thread_) return;
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thread_.reset(new std::thread([&]{
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if (initDecoder() != 0) {
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return;
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}
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while(!stop_.load()){
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std::unique_lock<std::mutex> locker(mutex_pkt_);
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cv_.wait(locker, [&]{
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return !list_pkt_.empty() || stop_.load();
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});
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if (stop_.load()){
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break;
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}
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auto pkt = list_pkt_.front();
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list_pkt_.pop_front();
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AVFrame *frame = av_frame_alloc();
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AVPacket np(pkt.data->getAVPacket());
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av_copy_packet(&np, &pkt.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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saveFrame(frame, pkt.id);
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}
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av_frame_free(&frame);
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}
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}));
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}
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int decoder::SetFrame(std::shared_ptr<ffwrapper::CodedData> data, int64_t &id){
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if (!data) return -1;
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if (decRef_->isAudioPkt(&data->getAVPacket())) return -2;
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// if (!thread_){
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// if (initDecoder() != 0) return -3;
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// Start();
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// }
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// std::lock_guard<std::mutex> l(mutex_pkt_);
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// list_pkt_.push_back({data, id});
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// cv_.notify_one();
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// return list_pkt_.size();
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if (!conv_){
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if (initDecoder() != 0) return -3;
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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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saveFrame(frame, id);
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}
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av_frame_free(&frame);
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}
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void decoder::GetFrame(unsigned char **data, int *w, int *h, int64_t *id){
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std::lock_guard<std::mutex> l(mutex_pic_);
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if(list_pic_.empty()){
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*data = NULL;
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*w = 0;
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*h = 0;
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return;
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}
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auto p = list_pic_.front();
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*data = p.data; *w = p.w; *h = p.h;
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*id = p.id;
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list_pic_.pop_front();
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}
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} // namespace cffmpeg_wrap
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