winamp/Src/nsavi/seektable.h
2024-09-24 14:54:57 +02:00

55 lines
1.7 KiB
C++

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