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106 lines
3.9 KiB
106 lines
3.9 KiB
/* |
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* "NUT" Container Format (de)muxer |
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* Copyright (c) 2006 Michael Niedermayer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef FFMPEG_NUT_H |
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#define FFMPEG_NUT_H |
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//#include <limits.h> |
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#include "avformat.h" |
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//#include "mpegaudio.h" |
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#include "riff.h" |
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//#include "adler32.h" |
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#define MAIN_STARTCODE (0x7A561F5F04ADULL + (((uint64_t)('N'<<8) + 'M')<<48)) |
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#define STREAM_STARTCODE (0x11405BF2F9DBULL + (((uint64_t)('N'<<8) + 'S')<<48)) |
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#define SYNCPOINT_STARTCODE (0xE4ADEECA4569ULL + (((uint64_t)('N'<<8) + 'K')<<48)) |
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#define INDEX_STARTCODE (0xDD672F23E64EULL + (((uint64_t)('N'<<8) + 'X')<<48)) |
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#define INFO_STARTCODE (0xAB68B596BA78ULL + (((uint64_t)('N'<<8) + 'I')<<48)) |
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#define ID_STRING "nut/multimedia container\0" |
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#define MAX_DISTANCE (1024*32-1) |
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typedef enum{ |
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FLAG_KEY = 1, ///<if set, frame is keyframe |
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FLAG_EOR = 2, ///<if set, stream has no relevance on presentation. (EOR) |
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FLAG_CODED_PTS = 8, ///<if set, coded_pts is in the frame header |
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FLAG_STREAM_ID = 16, ///<if set, stream_id is coded in the frame header |
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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. |
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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 |
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FLAG_INVALID =8192, ///<if set, frame_code is invalid |
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}flag_t; |
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typedef struct { |
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uint64_t pos; |
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uint64_t back_ptr; |
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// uint64_t global_key_pts; |
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int64_t ts; |
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} syncpoint_t; |
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typedef struct { |
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uint16_t flags; |
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uint8_t stream_id; |
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uint16_t size_mul; |
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uint16_t size_lsb; |
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int16_t pts_delta; |
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uint8_t reserved_count; |
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uint8_t header_idx; |
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} FrameCode; // maybe s/FrameCode/framecode_t/ or change all to Java style but do not mix |
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typedef struct { |
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int last_flags; |
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int skip_until_key_frame; |
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int64_t last_pts; |
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int time_base_id; |
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AVRational *time_base; |
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int msb_pts_shift; |
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int max_pts_distance; |
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int decode_delay; //FIXME duplicate of has_b_frames |
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} StreamContext;// maybe s/StreamContext/streamcontext_t/ |
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typedef struct { |
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AVFormatContext *avf; |
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// int written_packet_size; |
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// int64_t packet_start; |
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FrameCode frame_code[256]; |
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uint8_t header_len[128]; |
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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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unsigned int max_distance; |
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unsigned int time_base_count; |
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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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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(syncpoint_t *a, syncpoint_t *b); |
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int ff_nut_sp_pts_cmp(syncpoint_t *a, syncpoint_t *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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#endif /* FFMPEG_NUT_H */
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