/* * "NUT" Container Format (de)muxer * Copyright (c) 2006 Michael Niedermayer * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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_VERSION 3 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_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 } StreamContext; typedef struct ChapterContext { AVRational *time_base; } ChapterContext; typedef struct NUTContext { 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; int header_count; AVRational *time_base; struct AVTreeNode *syncpoints; } 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_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); void 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 */