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37e679881d
nut->last_syncpoint_pos doesn't necessarily change between resync attempts, so find_any_startcode can return the same startcode again. Thus remember where the last resync happened and don't try to resync before that. This can't be done locally in nut_read_packet, because this wouldn't prevent infinite resync loops, where after the resync a packet is returned and while reading a following packet the resync happens again. Reviewed-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
145 lines
4.9 KiB
C
145 lines
4.9 KiB
C
/*
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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 AVFORMAT_NUT_H
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#define AVFORMAT_NUT_H
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#include "avformat.h"
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#include "internal.h"
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#include "metadata.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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#define NUT_MAX_VERSION 4
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#define NUT_STABLE_VERSION 3
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#define NUT_MIN_VERSION 2
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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_SM_DATA = 256, ///<if set, side / meta data is stored 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;
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typedef struct Syncpoint {
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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;
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typedef struct FrameCode {
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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;
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typedef struct StreamContext {
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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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int64_t *keyframe_pts;
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} StreamContext;
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typedef struct ChapterContext {
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AVRational *time_base;
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} ChapterContext;
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typedef struct NUTContext {
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const AVClass *av_class;
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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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ChapterContext *chapter;
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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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int64_t last_resync_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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int sp_count;
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int write_index;
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int64_t max_pts;
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AVRational *max_pts_tb;
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#define NUT_BROADCAST 1 // use extended syncpoints
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#define NUT_PIPE 2 // do not write syncpoints
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int flags;
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int version; // version currently in use
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int minor_version;
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} NUTContext;
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extern const AVCodecTag ff_nut_subtitle_tags[];
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extern const AVCodecTag ff_nut_video_tags[];
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extern const AVCodecTag ff_nut_audio_tags[];
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extern const AVCodecTag ff_nut_audio_extra_tags[];
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extern const AVCodecTag ff_nut_data_tags[];
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extern const AVCodecTag * const ff_nut_codec_tags[];
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typedef struct Dispositions {
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char str[9];
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int flag;
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} Dispositions;
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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(const Syncpoint *a, const Syncpoint *b);
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int ff_nut_sp_pts_cmp(const Syncpoint *a, const Syncpoint *b);
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int ff_nut_add_sp(NUTContext *nut, int64_t pos, int64_t back_ptr, int64_t ts);
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void ff_nut_free_sp(NUTContext *nut);
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extern const Dispositions ff_nut_dispositions[];
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extern const AVMetadataConv ff_nut_metadata_conv[];
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#endif /* AVFORMAT_NUT_H */
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