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 43typedef 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 58typedef struct Syncpoint { 59 uint64_t pos; 60 uint64_t back_ptr; 61// uint64_t global_key_pts; 62 int64_t ts; 63} Syncpoint; 64 65typedef 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 75typedef 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 87typedef struct ChapterContext { 88 AVRational *time_base; 89} ChapterContext; 90 91typedef 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 119extern const AVCodecTag ff_nut_subtitle_tags[]; 120extern const AVCodecTag ff_nut_video_tags[]; 121extern const AVCodecTag ff_nut_audio_tags[]; 122extern const AVCodecTag ff_nut_audio_extra_tags[]; 123extern const AVCodecTag ff_nut_data_tags[]; 124 125extern const AVCodecTag * const ff_nut_codec_tags[]; 126 127typedef struct Dispositions { 128 char str[9]; 129 int flag; 130} Dispositions; 131 132void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val); 133int64_t ff_lsb2full(StreamContext *stream, int64_t lsb); 134int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b); 135int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b); 136int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts); 137void ff_nut_free_sp(NUTContext *nut); 138 139extern const Dispositions ff_nut_dispositions[]; 140 141extern const AVMetadataConv ff_nut_metadata_conv[]; 142 143#endif /* AVFORMAT_NUT_H */ 144