| 1 | /* |
| 2 | * "NUT" Container Format (de)muxer |
| 3 | * Copyright (c) 2006 Michael Niedermayer |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #ifndef AVFORMAT_NUT_H |
| 23 | #define AVFORMAT_NUT_H |
| 24 | |
| 25 | #include "avformat.h" |
| 26 | #include "internal.h" |
| 27 | #include "metadata.h" |
| 28 | |
| 29 | #define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48)) |
| 30 | #define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48)) |
| 31 | #define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48)) |
| 32 | #define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48)) |
| 33 | #define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48)) |
| 34 | |
| 35 | #define ID_STRING "nut/multimedia container\0" |
| 36 | |
| 37 | #define MAX_DISTANCE (1024*32-1) |
| 38 | |
| 39 | #define NUT_MAX_VERSION 4 |
| 40 | #define NUT_STABLE_VERSION 3 |
| 41 | #define NUT_MIN_VERSION 2 |
| 42 | |
| 43 | typedef enum{ |
| 44 | FLAG_KEY = 1, ///<if set, frame is keyframe |
| 45 | FLAG_EOR = 2, ///<if set, stream has no relevance on presentation. (EOR) |
| 46 | FLAG_CODED_PTS = 8, ///<if set, coded_pts is in the frame header |
| 47 | FLAG_STREAM_ID = 16, ///<if set, stream_id is coded in the frame header |
| 48 | FLAG_SIZE_MSB = 32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0 |
| 49 | FLAG_CHECKSUM = 64, ///<if set, the frame header contains a checksum |
| 50 | FLAG_RESERVED = 128, ///<if set, reserved_count is coded in the frame header |
| 51 | FLAG_SM_DATA = 256, ///<if set, side / meta data is stored in the frame header. |
| 52 | FLAG_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header. |
| 53 | FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header |
| 54 | FLAG_CODED =4096, ///<if set, coded_flags are stored in the frame header |
| 55 | FLAG_INVALID =8192, ///<if set, frame_code is invalid |
| 56 | } Flag; |
| 57 | |
| 58 | typedef struct Syncpoint { |
| 59 | uint64_t pos; |
| 60 | uint64_t back_ptr; |
| 61 | // uint64_t global_key_pts; |
| 62 | int64_t ts; |
| 63 | } Syncpoint; |
| 64 | |
| 65 | typedef struct FrameCode { |
| 66 | uint16_t flags; |
| 67 | uint8_t stream_id; |
| 68 | uint16_t size_mul; |
| 69 | uint16_t size_lsb; |
| 70 | int16_t pts_delta; |
| 71 | uint8_t reserved_count; |
| 72 | uint8_t header_idx; |
| 73 | } FrameCode; |
| 74 | |
| 75 | typedef struct StreamContext { |
| 76 | int last_flags; |
| 77 | int skip_until_key_frame; |
| 78 | int64_t last_pts; |
| 79 | int time_base_id; |
| 80 | AVRational *time_base; |
| 81 | int msb_pts_shift; |
| 82 | int max_pts_distance; |
| 83 | int decode_delay; //FIXME duplicate of has_b_frames |
| 84 | int64_t *keyframe_pts; |
| 85 | } StreamContext; |
| 86 | |
| 87 | typedef struct ChapterContext { |
| 88 | AVRational *time_base; |
| 89 | } ChapterContext; |
| 90 | |
| 91 | typedef struct NUTContext { |
| 92 | const AVClass *av_class; |
| 93 | AVFormatContext *avf; |
| 94 | // int written_packet_size; |
| 95 | // int64_t packet_start; |
| 96 | FrameCode frame_code[256]; |
| 97 | uint8_t header_len[128]; |
| 98 | const uint8_t *header[128]; |
| 99 | uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable |
| 100 | StreamContext *stream; |
| 101 | ChapterContext *chapter; |
| 102 | unsigned int max_distance; |
| 103 | unsigned int time_base_count; |
| 104 | int64_t last_syncpoint_pos; |
| 105 | int header_count; |
| 106 | AVRational *time_base; |
| 107 | struct AVTreeNode *syncpoints; |
| 108 | int sp_count; |
| 109 | int write_index; |
| 110 | int64_t max_pts; |
| 111 | AVRational *max_pts_tb; |
| 112 | #define NUT_BROADCAST 1 // use extended syncpoints |
| 113 | #define NUT_PIPE 2 // do not write syncpoints |
| 114 | int flags; |
| 115 | int version; // version currently in use |
| 116 | int minor_version; |
| 117 | } NUTContext; |
| 118 | |
| 119 | extern const AVCodecTag ff_nut_subtitle_tags[]; |
| 120 | extern const AVCodecTag ff_nut_video_tags[]; |
| 121 | extern const AVCodecTag ff_nut_audio_tags[]; |
| 122 | extern const AVCodecTag ff_nut_audio_extra_tags[]; |
| 123 | extern const AVCodecTag ff_nut_data_tags[]; |
| 124 | |
| 125 | extern const AVCodecTag * const ff_nut_codec_tags[]; |
| 126 | |
| 127 | typedef struct Dispositions { |
| 128 | char str[9]; |
| 129 | int flag; |
| 130 | } Dispositions; |
| 131 | |
| 132 | void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val); |
| 133 | int64_t ff_lsb2full(StreamContext *stream, int64_t lsb); |
| 134 | int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b); |
| 135 | int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b); |
| 136 | int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts); |
| 137 | void ff_nut_free_sp(NUTContext *nut); |
| 138 | |
| 139 | extern const Dispositions ff_nut_dispositions[]; |
| 140 | |
| 141 | extern const AVMetadataConv ff_nut_metadata_conv[]; |
| 142 | |
| 143 | #endif /* AVFORMAT_NUT_H */ |