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