Libav 0.7.1
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00001 /* 00002 * "NUT" Container Format (de)muxer 00003 * Copyright (c) 2006 Michael Niedermayer 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; 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 AVRational *time_base; 00086 } ChapterContext; 00087 00088 typedef struct { 00089 AVFormatContext *avf; 00090 // int written_packet_size; 00091 // int64_t packet_start; 00092 FrameCode frame_code[256]; 00093 uint8_t header_len[128]; 00094 const uint8_t *header[128]; 00095 uint64_t next_startcode; 00096 StreamContext *stream; 00097 ChapterContext *chapter; 00098 unsigned int max_distance; 00099 unsigned int time_base_count; 00100 int64_t last_syncpoint_pos; 00101 int header_count; 00102 AVRational *time_base; 00103 struct AVTreeNode *syncpoints; 00104 } NUTContext; 00105 00106 extern const AVCodecTag ff_nut_subtitle_tags[]; 00107 extern const AVCodecTag ff_nut_video_tags[]; 00108 00109 typedef struct { 00110 char str[9]; 00111 int flag; 00112 } Dispositions; 00113 00114 void ff_nut_reset_ts(NUTContext *nut, AVRational time_base, int64_t val); 00115 int64_t ff_lsb2full(StreamContext *stream, int64_t lsb); 00116 int ff_nut_sp_pos_cmp(const Syncpoint *a, const Syncpoint *b); 00117 int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b); 00118 void ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts); 00119 void ff_nut_free_sp(NUTContext *nut); 00120 00121 extern const Dispositions ff_nut_dispositions[]; 00122 00123 extern const AVMetadataConv ff_nut_metadata_conv[]; 00124 00125 #endif /* AVFORMAT_NUT_H */