yohhoy

#!/usr/bin/env python3
import math
import sys
from operator import itemgetter

pgmfile = sys.argv[1]

with open(pgmfile, 'rb') as f:
    # parse PGM header
    f.readline()

yohhoy

package jp.yohhoy.hevcdec;

import android.app.Activity;
import android.content.Context;
import android.media.MediaCodec;
import android.media.MediaFormat;
import android.os.Bundle;
import android.util.Log;
import android.util.Size;
import android.view.Surface;

yohhoy

/*
 * heic2hevc.cpp -- convert HEIC file to H.265 bitstream(Annex.B)
 * Copyright(c) 2017 yohhoy
 *
 * depends https://github.com/nokiatech/heif
 */
#include <iostream>
#include "hevcimagefilereader.hpp"

int extract(const char* srcfile, const char* dstfile)

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*********** NAL UNIT (VPS) ***********
       0  forbidden_zero_bit                                 u(1)  : 0
       1  nal_unit_type                                      u(6)  : 32
       2  nuh_layer_id                                       u(6)  : 0
       3  nuh_temporal_id_plus1                              u(3)  : 1
=========== Video Parameter Set     ===========
       4  vps_video_parameter_set_id                         u(4)  : 0
       5  vps_base_layer_internal_flag                       u(1)  : 1
       6  vps_base_layer_available_flag                      u(1)  : 1
       7  vps_max_layers_minus1                              u(6)  : 0

yohhoy

.LC0:
        .string "ABCDEFGHIJKLMNOP"
main:
        subq    $8, %rsp
        movl    $16, %edi
        movl    $.LC0, %esi
        call    sink(std::basic_string_view<char, std::char_traits<char> >)
        movl    $16, %edi
        movl    $.LC0, %esi
        call    sink(std::basic_string_view<char, std::char_traits<char> >)

yohhoy

#include <chrono>
#include <iostream>

using namespace std::chrono;

year_month_day premium_friday(year y, month m)
{
  return sys_days{y/m/Friday[last]};
}

yohhoy

AV1 coding scheme

• Arithmetic coding
  • multi-symbols (up to 16 values)
  • Coefficients coding: lv_map
  • CDF: Cumulative distribution function
    • CDF update (at the end of frame)
    • CDF update (adaptive per symbol)
• Image blocking

yohhoy

>>
15.9. Class Instance Creation Expressions

A class instance creation expression is a poly expression (§15.2) if it uses the diamond form for type arguments to the class, and it appears in an assignment context or an invocation context (§5.2, §5.3). Otherwise, it is a standalone expression.

We say that a class is instantiated when an instance of the class is created by a class instance creation expression. Class instantiation involves determining the class to be instantiated (§15.9.1), the enclosing instances (if any) of the newly created instance (§15.9.2), and the constructor to be invoked to create the new instance (§15.9.3).
<<

>>
15.9.1. Determining the Class being Instantiated

yohhoy

#include <condition_variable>
#include <chrono>
#include <iostream>
#include <mutex>
#include <thread>
#include <utility>
#include <vector>
#include <experimental/coroutine>

yohhoy

// delayqueue.cpp -- C++ delay queue
// Copyright (c) 2018 yohhoy
//
// Boost Software License, Version 1.0
// https://www.boost.org/LICENSE_1_0.txt
#include <chrono>
#include <condition_variable>
#include <mutex>
#include <utility>
#include <vector>