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* "NUT" Container Format (de)muxer
* Copyright (c) 2006 Michael Niedermayer
* This file is part of FFmpeg.
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#include "avformat.h"
#include "internal.h"
#include "metadata.h"
#define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
#define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
#define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
#define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
#define ID_STRING "nut/multimedia container\0"
#define MAX_DISTANCE (1024*32-1)
typedef enum{
FLAG_KEY = 1, ///<if set, frame is keyframe
FLAG_EOR = 2, ///<if set, stream has no relevance on presentation. (EOR)
FLAG_CODED_PTS = 8, ///<if set, coded_pts is in the frame header
FLAG_STREAM_ID = 16, ///<if set, stream_id is coded in the frame header
FLAG_SIZE_MSB = 32, ///<if set, data_size_msb is at frame header, otherwise data_size_msb is 0
FLAG_CHECKSUM = 64, ///<if set, the frame header contains a checksum
FLAG_RESERVED = 128, ///<if set, reserved_count is coded in the frame header
FLAG_SM_DATA = 256, ///<if set, side / meta data is stored in the frame header.
FLAG_HEADER_IDX =1024, ///<If set, header_idx is coded in the frame header.
FLAG_MATCH_TIME =2048, ///<If set, match_time_delta is coded in the frame header
FLAG_CODED =4096, ///<if set, coded_flags are stored in the frame header
FLAG_INVALID =8192, ///<if set, frame_code is invalid
} Flag;
typedef struct Syncpoint {
uint64_t pos;
uint64_t back_ptr;
// uint64_t global_key_pts;
int64_t ts;
} Syncpoint;
typedef struct FrameCode {
uint16_t flags;
uint8_t stream_id;
uint16_t size_mul;
uint16_t size_lsb;
int16_t pts_delta;
uint8_t reserved_count;
uint8_t header_idx;
} FrameCode;
typedef struct StreamContext {
int last_flags;
int skip_until_key_frame;
int64_t last_pts;
int time_base_id;
AVRational *time_base;
int msb_pts_shift;
int max_pts_distance;
int decode_delay; //FIXME duplicate of has_b_frames
int64_t *keyframe_pts;
} StreamContext;
typedef struct ChapterContext {
AVRational *time_base;
} ChapterContext;
typedef struct NUTContext {
const AVClass *av_class;
AVFormatContext *avf;
// int written_packet_size;
// int64_t packet_start;
FrameCode frame_code[256];
uint8_t header_len[128];
const uint8_t *header[128];
uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable
StreamContext *stream;
ChapterContext *chapter;
unsigned int max_distance;
unsigned int time_base_count;
int64_t last_syncpoint_pos;
int64_t last_resync_pos;
int header_count;
AVRational *time_base;
struct AVTreeNode *syncpoints;
int sp_count;
int write_index;
int64_t max_pts;
AVRational *max_pts_tb;
#define NUT_BROADCAST 1 // use extended syncpoints
#define NUT_PIPE 2 // do not write syncpoints
int flags;
int version; // version currently in use
int minor_version;
} NUTContext;
extern const AVCodecTag ff_nut_subtitle_tags[];
extern const AVCodecTag ff_nut_video_tags[];
extern const AVCodecTag ff_nut_audio_tags[];
extern const AVCodecTag ff_nut_audio_extra_tags[];
extern const AVCodecTag ff_nut_data_tags[];
extern const AVCodecTag * const ff_nut_codec_tags[];
typedef struct Dispositions {
char str[9];
int flag;
} Dispositions;
void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
void ff_nut_free_sp(NUTContext *nut);
extern const Dispositions ff_nut_dispositions[];
extern const AVMetadataConv ff_nut_metadata_conv[];
#endif /* AVFORMAT_NUT_H */