path: root/test/test_multiplexer.cc

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            test_multiplexer.cc
 *
 *  Wed May  7 08:37:33 CEST 2014
 *  Copyright  2005 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of MIaV.
 *
 *  MIaV is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  MIaV is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with MIaV; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include <cppunit/extensions/HelperMacros.h>

#include "../src/multiplexer.cc"
#include "../src/multicast.cc"
#include "../src/frame.cc"
#include "../src/miav_config.cc"
#include "../src/file.cc"
#include "../src/info_console.cc"
#include "../src/info.cc"
#include "../src/threadsafe_queue_priority.cc"
#include "../src/mutex.cc"
#include "../src/semaphore.cc"
#include "../src/util.cc"

// Class used to set config variables from string.
class MiavConfigString : public MiavConfig {
public:
  MiavConfigString(const char *configstring) : MiavConfig() {
    configs = parse((char*)configstring);
  }
};

class StringFile : public File {
public:
  StringFile(Info *info) : File(info) {}
  int Write(void* data, int size) {
    str.append((const char*)data, (size_t)size);
    return size;
  }

  std::string str;
};

std::string bin2str(uint64_t i)
{
  char test[32];
  i = htonll(i);
  sprintf(test, "%016llX", i);
  return test;
}

std::string bin2str(uint32_t i)
{
  char test[32];
  sprintf(test, "%08X", htonl(i));
  return test;
}

std::string bin2str24(uint32_t i)
{
  char test[32];
  sprintf(test, "%06X", (htonl(i) >> 8) & 0xffffff);
  return test;
}

std::string bin2str(uint16_t i)
{
  char test[32];
  sprintf(test, "%04X", htons(i));
  return test;
}

std::string bin2str(uint8_t i)
{
  char test[32];
  sprintf(test, "%02X", i);
  return test;
}

class MultiplexerTest : public Multiplexer {
public:
  MultiplexerTest(File *f, Multicast *m, Info *i, volatile bool *r,
                  ThreadSafeQueuePriority *video_q,
                  ThreadSafeQueuePriority *audio_q)
    : Multiplexer(f, m, i, r, video_q, audio_q) {}
  void system_header() { Multiplexer::system_header(); }
  void pack_header(uint32_t SCR) {
    Multiplexer::SCR = SCR; Multiplexer::pack_header();
  }
};

// Originally declared in artefact.cc but we cannot include that since main
// resides there...
class test_multiplexer : public CppUnit::TestFixture
{
  CPPUNIT_TEST_SUITE(test_multiplexer);
	CPPUNIT_TEST(test_SCR);
	CPPUNIT_TEST(test_Rmux);
	CPPUNIT_TEST(test_pack);
	CPPUNIT_TEST(test_system_header);
	CPPUNIT_TEST_SUITE_END();

public:
  InfoConsole *info;
  MiavConfigString *cfg;
  volatile bool r;

	void setUp() {
    cfg = new MiavConfigString(
           "server_log_file=\"/tmp/miav_unit_test.log\"\n"
           "server_trash=\"\"\n"
           "server_later=\"\"\n");
    config = cfg; // Global. Declared as extern in miav_config.h
    info = new InfoConsole(cfg);
  }

	void tearDown() {
    delete cfg;
    delete info;
  }

  void test_SCR() {
    uint32_t scr = 0xD2345678;

    printf("%x\n", TIMECODE32_30(scr));
    CPPUNIT_ASSERT(TIMECODE32_30(scr) == 0x3);

    printf("%x\n", TIMECODE29_15(scr));
    CPPUNIT_ASSERT(TIMECODE29_15(scr) == 0x2468);

    printf("%x\n", TIMECODE14_0(scr));
    CPPUNIT_ASSERT(TIMECODE14_0(scr) == 0x5678);
  }
   
  void test_Rmux() {
    /**
     * Calculates Rmux according to subclause A.6.4
     * mux stands for multiplexing and R for Rate,
     * so Rmux is the rate of the multiplexing.
     * IMPORTANT: The formula is wrong...
     * See
     *  https://www.iso.org/obp/ui/#iso:std:iso-iec:11172:-1:ed-1:v1:cor:2:v1:en
     * for the correct formula:
     * Rmux = (video_data_rate + audio_data_rate) *
     *        packet_header_size + pack_header_size / packets_per_pack
     * ( 1 + ---------------------------------------------------------- )
     *                             packet_data_size
     */

    // Values taken from iso document example.
    double video_data_rate = 150000;
    double audio_data_rate = 24000;
    double packet_header_size = 20;
    double pack_header_size = 12;
    double packets_per_pack = 3;
    double packet_data_size = 2028;

    uint32_t m = ISO11172_1::Rmux(video_data_rate,
                                  audio_data_rate,
                                  packet_header_size,
                                  pack_header_size,
                                  packets_per_pack,
                                  packet_data_size);
    CPPUNIT_ASSERT(m == 176059); // Ref value taken from iso document.
  }

  void test_pack() {
    StringFile file(info);
    MultiplexerTest mp(&file, NULL, info, &r, NULL, NULL);
    mp.pack_header(0xD2345678);

    printf("pack_header:\n  ");
    for(size_t i = 0; i < file.str.length(); i++) {
      printf("%s ", bin2str(*((uint8_t*)(file.str.data() + i))).c_str());
    }
    printf("\n");

    std::string test;
    
    /*
      pack_start_code (32 bit) 000001BA in hex.
    */
    test = bin2str(*((uint32_t*)(file.str.data() + 0)));
    printf("system_header_start_code: %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "000001BA");

    /*
      system_clock:
      marker (4 bits): 0b0010
      sys_clk_ref_32-30 (3 bits): 0x3
      marker bit(1 bit): 1
      sys_clk_ref_29-15 (15 bits): 0x2468
      marker bit(1 bit): 1
      sys_clk_ref_14-0 (15 bits): 0x5678
      marker bit(1 bit): 1
      marker bit(1 bit): 1
      mux_rate (22 bits): 0x12B667
      marker bit(1 bit): 1
      64 bits total as hex: 2748D1ACF1A56CCF
    */

    /* // Calculate mux rate
    uint32_t rmux =
      ISO11172_1::Rmux(112000, // if no audio frame exists
                       1100000, // if no video frame exists
                       20, // packet_header_size,
                       12, // pack_header_size,
                       PACKETS_PER_PACK, // packets_per_pack,
                       PACKET_SIZE);
    printf("Rmux: %8X\n", rmux);
    */

    test = bin2str(*((uint64_t*)(file.str.data() + 4)));
    CPPUNIT_ASSERT(test == "2748D1ACF1A56CCF");
  }

  void test_system_header() {
    StringFile file(info);
    MultiplexerTest mp(&file, NULL, info, &r, NULL, NULL);
    mp.system_header();

    printf("system_header:\n  ");
    for(size_t i = 0; i < file.str.length(); i++) {
      printf("%s ", bin2str(*((uint8_t*)(file.str.data() + i))).c_str());
    }
    printf("\n");

    std::string test;

    /*
      system_header_start_code (32 bit) 000001BB in hex.
    */
    test = bin2str(*((uint32_t*)(file.str.data() + 0)));
    printf("system_header_start_code: %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "000001BB");
    
    /*
      header_length (16 bit) not counting start code and header_length itself.
      We run with precisely one video stream and one audio stream.
      48 bits in fixed header.
      24 bits in each of the streamid chunks (of which we have 2)
      96 bits in total = 12 bytes (000C in hex)
    */
    test = bin2str(*((uint16_t*)(file.str.data() + 4)));
    printf("header length: %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "000C");

    /*
      marker_bit (1 bit) set to 1
      rate_bound (22 bits) with integer value 3521
      marker_bit (1 bit) set to 1
      24 bits in total with the value 801B83 in hex.
     */
    test = bin2str24(*((uint32_t*)(file.str.data() + 6)));
    printf("rate_bound: %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "801B83");

    /*
      header.bits.marker_bit = 1;
      header.bits.audio_bound = 1; // Only 1 audio stream
      header.bits.fixed_flag = 1; // Fixed bitrate (0 indicates vbr)
      header.bits.CSPS_flag = 1; // Standarts compliant?
      header.bits.system_audio_clock_flag = 1; // FIXME: What excactly is this??
      header.bits.system_video_clock_flag = 1; // FIXME: What excactly is this??
      header.bits.video_bound = 1; // Only 1 video stream
      header.bits.reserved_byte = 0xFF; // Must be 0xFF
      24 bits in total with the value 07E1FF in hex.
     */
    test = bin2str24(*((uint32_t*)(file.str.data() + 9)));
    printf("the rest(tm): %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "07E1FF");

    /*
      audio stream descriptor:
      stream_id (8 bits) 0xC0
      marking bits (2 bits): 0b11
      STD_buffer_bound_scale (1 bit) : 0
      STD_buffer_size_bound (13 bits) : 32
      Total of 24 bits with the value C0E020
     */
    test = bin2str24(*((uint32_t*)(file.str.data() + 12)));
    printf("audio stream descriptor: %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "C0C020");

    /*
      video stream descriptor:
      stream_id (8 bits) 0xE3
      marking bits (2 bits): 0b11
      STD_buffer_bound_scale (1 bit) : 1
      STD_buffer_size_bound (13 bits) : 46
      Total of 24 bits with the value E3E02E
     */
    test = bin2str24(*((uint32_t*)(file.str.data() + 15)));
    printf("video stream descriptor: %s\n", test.c_str());
    CPPUNIT_ASSERT(test == "E3E02E");
  }
};

// Registers the fixture into the 'registry'
CPPUNIT_TEST_SUITE_REGISTRATION(test_multiplexer);