55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
#pragma once
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#include <map>
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#include "../nsavi/avi_header.h"
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//#define SEEK_TABLE_STORE_CHUNK_HEADER
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namespace nsavi
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{
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struct HeaderList;
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struct SeekEntry
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{
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SeekEntry(int dummy=0) : timestamp(0), absolute(false) {}
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int timestamp; // in miliseconds
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bool absolute;
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uint64_t file_position = 0;
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#ifdef SEEK_TABLE_STORE_CHUNK_HEADER
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uint32_t chunk_id; // chunk ID at file_position, used to verify seeking
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uint32_t chunk_size; // chunk size at file_position, used to verify seeking
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#endif
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uint64_t stream_time = 0; // actually allocated to header_list->stream_list_size
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};
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class SeekTable
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{
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public:
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SeekTable(int stream_number, bool require_keyframes, const nsavi::HeaderList *header_list);
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~SeekTable();
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enum
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{
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SEEK_WHATEVER=0,
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SEEK_FORWARD=1,
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SEEK_BACKWARD=2,
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};
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const SeekEntry *GetSeekPoint(int ×tamp_ms, int current_ms=0, int seek_direction=SEEK_WHATEVER);
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void AddIndex(const IDX1 *index);
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void AddIndex(const INDX *index, uint64_t start_time);
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// returns a recommend place to go hunting for an idx1, indx or ix## chunk
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// usually based on indx super chunks already found in header_list
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bool GetIndexLocation(int timestamp, uint64_t *position, uint64_t *start_time);
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typedef std::map<int, SeekEntry> SeekEntries; // mapped to timestamp in milliseconds
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SeekEntries seek_entries;
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std::map<const void *, bool> data_processed; // TODO: make nu::Set
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const nsavi::HeaderList *header_list;
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int stream_number; // which stream number is this Seek Table associated with
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bool require_keyframes; // whether or not the master stream requires keyframes
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const nsavi::STRH *stream;
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const nsavi::AVISUPERINDEX *super_index;
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uint32_t indices_processed;
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uint64_t super_index_duration;
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};
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} |