Method drain

pj_scene2D/core/src/ffmpeg_decoder.cpp:339–359

}

std::vector<DecodedFrame> FfmpegDecoder::drain() {
  std::vector<DecodedFrame> frames;
  if (codec_ctx_ == nullptr) {
    return frames;
  }

  // Send NULL packet to drain
  avcodec_send_packet(codec_ctx_, nullptr);

  AVFrame* frame = av_frame_alloc();
  while (avcodec_receive_frame(codec_ctx_, frame) >= 0) {
    auto result = avFrameToDecodedFrame(frame);
    if (result.has_value()) {
      result->pts = frame->pts;
      frames.push_back(std::move(*result));
    }
    av_frame_unref(frame);
  }
  av_frame_free(&frame);
  return frames;
}

int FfmpegDecoder::width() const {
  return codec_ctx_ != nullptr ? codec_ctx_->width : 0;