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1 /*****************************************************************************
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2 * Copyright (C) 2013 x265 project
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3 *
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4 * Authors: Steve Borho <steve@borho.org>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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19 *
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20 * This program is also available under a commercial proprietary license.
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21 * For more information, contact us at license @ x265.com.
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22 *****************************************************************************/
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23
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24 #include "common.h"
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25 #include "bitstream.h"
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26 #include "slice.h"
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27 #include "sei.h"
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28
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29 using namespace X265_NS;
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30
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31 /* x265's identifying GUID */
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32 const uint8_t SEIuserDataUnregistered::m_uuid_iso_iec_11578[16] = {
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33 0x2C, 0xA2, 0xDE, 0x09, 0xB5, 0x17, 0x47, 0xDB,
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34 0xBB, 0x55, 0xA4, 0xFE, 0x7F, 0xC2, 0xFC, 0x4E
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35 };
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36
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37 /* marshal a single SEI message sei, storing the marshalled representation
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38 * in bitstream bs */
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39 void SEI::write(Bitstream& bs, const SPS& sps)
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40 {
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41 BitCounter count;
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42 m_bitIf = &count;
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43
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44 /* virtual writeSEI method, write to bit counter */
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45 writeSEI(sps);
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46
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47 m_bitIf = &bs;
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48 uint32_t type = payloadType();
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49 for (; type >= 0xff; type -= 0xff)
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50 WRITE_CODE(0xff, 8, "payload_type");
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51 WRITE_CODE(type, 8, "payload_type");
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52
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53 X265_CHECK(0 == (count.getNumberOfWrittenBits() & 7), "payload unaligned\n");
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54 uint32_t payloadSize = count.getNumberOfWrittenBits() >> 3;
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55 for (; payloadSize >= 0xff; payloadSize -= 0xff)
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56 WRITE_CODE(0xff, 8, "payload_size");
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57 WRITE_CODE(payloadSize, 8, "payload_size");
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58
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59 /* virtual writeSEI method, write to bs */
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60 writeSEI(sps);
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61 }
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62
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63 void SEI::writeByteAlign()
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64 {
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65 // TODO: expose bs.writeByteAlignment() as virtual function
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66 if (m_bitIf->getNumberOfWrittenBits() % 8 != 0)
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67 {
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68 WRITE_FLAG(1, "bit_equal_to_one");
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69 while (m_bitIf->getNumberOfWrittenBits() % 8 != 0)
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70 {
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71 WRITE_FLAG(0, "bit_equal_to_zero");
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72 }
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73 }
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74 }
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