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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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* 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
*/
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#ifndef AVFORMAT_NUT_H
#define AVFORMAT_NUT_H |
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//#include <limits.h> |
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//#include "libavutil/adler32.h"
//#include "libavcodec/mpegaudio.h" |
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#include "avformat.h"
#include "riff.h" |
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#include "metadata.h" |
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#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 |
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FLAG_CHECKSUM = 64, ///<if set, the frame header contains a checksum |
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FLAG_RESERVED = 128, ///<if set, reserved_count is coded in the frame header |
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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 |
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FLAG_CODED =4096, ///<if set, coded_flags are stored in the frame header
FLAG_INVALID =8192, ///<if set, frame_code is invalid |
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} Flag; |
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typedef struct { |
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uint64_t pos;
uint64_t back_ptr;
// uint64_t global_key_pts;
int64_t ts; |
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} Syncpoint; |
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typedef struct {
uint16_t flags;
uint8_t stream_id;
uint16_t size_mul;
uint16_t size_lsb;
int16_t pts_delta;
uint8_t reserved_count; |
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uint8_t header_idx; |
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} FrameCode; |
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typedef struct { |
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int last_flags;
int skip_until_key_frame; |
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int64_t last_pts;
int time_base_id; |
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AVRational *time_base; |
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int msb_pts_shift;
int max_pts_distance;
int decode_delay; //FIXME duplicate of has_b_frames |
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} StreamContext; |
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typedef struct { |
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AVRational *time_base;
} ChapterContext;
typedef struct { |
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AVFormatContext *avf; |
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// int written_packet_size;
// int64_t packet_start; |
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FrameCode frame_code[256]; |
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uint8_t header_len[128];
const uint8_t *header[128]; |
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uint64_t next_startcode; ///< stores the next startcode if it has already been parsed but the stream is not seekable |
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StreamContext *stream; |
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ChapterContext *chapter; |
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unsigned int max_distance;
unsigned int time_base_count;
int64_t last_syncpoint_pos; |
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int header_count; |
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AVRational *time_base; |
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struct AVTreeNode *syncpoints; |
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} NUTContext;
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extern const AVCodecTag ff_nut_subtitle_tags[]; |
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extern const AVCodecTag ff_nut_video_tags[]; |
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typedef struct {
char str[9];
int flag;
} Dispositions;
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void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val); |
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int64_t ff_lsb2full(StreamContext *stream, int64_t lsb); |
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int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b); |
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void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts); |
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void ff_nut_free_sp(NUTContext *nut); |
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extern const Dispositions ff_nut_dispositions[];
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extern const AVMetadataConv ff_nut_metadata_conv[];
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#endif /* AVFORMAT_NUT_H */ |