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libavformat/nut.h

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00001 /*
00002  * "NUT" Container Format (de)muxer
00003  * Copyright (c) 2006 Michael Niedermayer
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #ifndef AVFORMAT_NUT_H
00023 #define AVFORMAT_NUT_H
00024 
00025 //#include <limits.h>
00026 //#include "libavutil/adler32.h"
00027 //#include "libavcodec/mpegaudio.h"
00028 #include "avformat.h"
00029 #include "riff.h"
00030 #include "metadata.h"
00031 
00032 #define      MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48))
00033 #define    STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48))
00034 #define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48))
00035 #define     INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48))
00036 #define      INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48))
00037 
00038 #define ID_STRING "nut/multimedia container\0"
00039 
00040 #define MAX_DISTANCE (1024*32-1)
00041 
00042 typedef enum{
00043     FLAG_KEY        =   1, 
00044     FLAG_EOR        =   2, 
00045     FLAG_CODED_PTS  =   8, 
00046     FLAG_STREAM_ID  =  16, 
00047     FLAG_SIZE_MSB   =  32, 
00048     FLAG_CHECKSUM   =  64, 
00049     FLAG_RESERVED   = 128, 
00050     FLAG_HEADER_IDX =1024, 
00051     FLAG_MATCH_TIME =2048, 
00052     FLAG_CODED      =4096, 
00053     FLAG_INVALID    =8192, 
00054 } Flag;
00055 
00056 typedef struct {
00057     uint64_t pos;
00058     uint64_t back_ptr;
00059 //    uint64_t global_key_pts;
00060     int64_t ts;
00061 } Syncpoint;
00062 
00063 typedef struct {
00064     uint16_t flags;
00065     uint8_t  stream_id;
00066     uint16_t size_mul;
00067     uint16_t size_lsb;
00068     int16_t  pts_delta;
00069     uint8_t  reserved_count;
00070     uint8_t  header_idx;
00071 } FrameCode;
00072 
00073 typedef struct {
00074     int last_flags;
00075     int skip_until_key_frame;
00076     int64_t last_pts;
00077     int time_base_id;
00078     AVRational *time_base;
00079     int msb_pts_shift;
00080     int max_pts_distance;
00081     int decode_delay; //FIXME duplicate of has_b_frames
00082 } StreamContext;
00083 
00084 typedef struct {
00085     AVFormatContext *avf;
00086 //    int written_packet_size;
00087 //    int64_t packet_start;
00088     FrameCode frame_code[256];
00089     uint8_t header_len[128];
00090     const uint8_t *header[128];
00091     uint64_t next_startcode;     
00092     StreamContext *stream;
00093     unsigned int max_distance;
00094     unsigned int time_base_count;
00095     int64_t last_syncpoint_pos;
00096     int header_count;
00097     AVRational *time_base;
00098     struct AVTreeNode *syncpoints;
00099 } NUTContext;
00100 
00101 extern const AVCodecTag ff_nut_subtitle_tags[];
00102 
00103 typedef struct {
00104     char str[9];
00105     int flag;
00106 } Dispositions;
00107 
00108 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val);
00109 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb);
00110 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b);
00111 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
00112 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
00113 void ff_nut_free_sp(NUTContext *nut);
00114 
00115 extern const Dispositions ff_nut_dispositions[];
00116 
00117 extern const AVMetadataConv ff_nut_metadata_conv[];
00118 
00119 #endif /* AVFORMAT_NUT_H */

Generated on Fri Sep 16 2011 17:17:49 for FFmpeg by  doxygen 1.7.1