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// -*- mode:objc -*-
** DVR.h
** Copyright 2010
** Author: George Nachman
** Project: iTerm2
** Description: Implements a "digital video recorder" for iTerm2.
** This is used by the "instant replay" feature to record and
** play back the screen contents.
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** GNU General Public License for more details.
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#import <Cocoa/Cocoa.h>
#import <DVRBuffer.h>
#import <DVRDecoder.h>
#import <DVREncoder.h>
@interface DVR : NSObject
DVRBuffer* buffer_;
int capacity_;
NSMutableArray* decoders_;
DVREncoder* encoder_;
// Allocates a circular buffer of the given size in bytes to store screen
// contents. Somewhat more memory is used because there's some per-frame
// storage, but it should be small in comparison.
- (id)initWithBufferCapacity:(int)bytes;
- (void)dealloc;
// Save the screen state into the DVR.
// buffer: A screen image that DVREncoder understands.
// length: Number of bytes in buffer.
// info: Metadata for the frame.
- (void)appendFrame:(char*)buffer length:(int)length info:(DVRFrameInfo*)info;
// allocate a new decoder. Use -[releaseDecoder:] when you're done with it.
- (DVRDecoder*)getDecoder;
// frees a decoder allocated with -[getDecoder].
- (void)releaseDecoder:(DVRDecoder*)decoder;
// Get timestamp of first/last frame. Times are in microseconds since 1970.
- (long long)lastTimeStamp;
- (long long)firstTimeStamp;