C++ (Cpp) File::readBlock Examples

Example #1

File: test_mp4.cpp Project: ABuus/partyplayer

  void testUpdateStco()
  {
    string filename = copyFile("no-tags", ".3g2");

    MP4::File *f = new MP4::File(filename.c_str());
    f->tag()->setArtist(ByteVector(3000, 'x'));

    ByteVectorList data1;
    {
      MP4::Atoms a(f);
      MP4::Atom *stco = a.find("moov")->findall("stco", true)[0];
      f->seek(stco->offset + 12);
      ByteVector data = f->readBlock(stco->length - 12);
      unsigned int count = data.mid(0, 4).toUInt();
      int pos = 4;
      while (count--) {
        unsigned int offset = data.mid(pos, 4).toUInt();
        f->seek(offset);
        data1.append(f->readBlock(20));
        pos += 4;
      }
    }

    f->save();
    delete f;
    f = new MP4::File(filename.c_str());

    {
      MP4::Atoms a(f);
      MP4::Atom *stco = a.find("moov")->findall("stco", true)[0];
      f->seek(stco->offset + 12);
      ByteVector data = f->readBlock(stco->length - 12);
      unsigned int count = data.mid(0, 4).toUInt();
      int pos = 4, i = 0;
      while (count--) {
        unsigned int offset = data.mid(pos, 4).toUInt();
        f->seek(offset);
        CPPUNIT_ASSERT_EQUAL(data1[i], f->readBlock(20));
        pos += 4;
        i++;
      }
    }

    delete f;

    deleteFile(filename);
  }