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 int64_t last_resync_pos; 106 int header_count; 107 AVRational *time_base; 108 struct AVTreeNode *syncpoints; 109 int sp_count; 110 int write_index; 111 int64_t max_pts; 112 AVRational *max_pts_tb; 113 #define NUT_BROADCAST 1 // use extended syncpoints 114 #define NUT_PIPE 2 // do not write syncpoints 115 int flags; 116 int version; // version currently in use 117 int minor_version; 118 } NUTContext; 119 120 extern const AVCodecTag ff_nut_subtitle_tags[]; 121 extern const AVCodecTag ff_nut_video_tags[]; 122 extern const AVCodecTag ff_nut_audio_tags[]; 123 extern const AVCodecTag ff_nut_audio_extra_tags[]; 124 extern const AVCodecTag ff_nut_data_tags[]; 125 126 extern const AVCodecTag * const ff_nut_codec_tags[]; 127 128 typedef struct Dispositions { 129 char str[9]; 130 int flag; 131 } Dispositions; 132 133 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val); 134 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb); 135 int ff_nut_sp_pos_cmp(const void *a, const void *b); 136 int ff_nut_sp_pts_cmp(const void *a, const void *b); 137 int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts); 138 void ff_nut_free_sp(NUTContext *nut); 139 140 extern const Dispositions ff_nut_dispositions[]; 141 142 extern const AVMetadataConv ff_nut_metadata_conv[]; 143 144 #endif /* AVFORMAT_NUT_H */ 145