/*
  * "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
  */
 

 #ifndef AVFORMAT_NUT_H
 #define AVFORMAT_NUT_H

 #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)
 

 #define NUT_MAX_VERSION 4
 #define NUT_STABLE_VERSION 3
 #define NUT_MIN_VERSION 2

 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 */