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/* $Id: TargetSizeField.mm,v 1.1.1.1 2003/11/03 12:03:51 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#include "TargetSizeField.h"
@implementation HBTargetSizeField
- (void) textDidBeginEditing: (NSNotification *) notification
{
[self UpdateBitrate];
[super textDidBeginEditing: notification];
}
- (void) textDidEndEditing: (NSNotification *) notification
{
[self UpdateBitrate];
[super textDidEndEditing: notification];
}
- (void) textDidChange: (NSNotification *) notification
{
[self UpdateBitrate];
[super textDidChange: notification];
}
- (void) SetHBTitle: (HBTitle*) title
{
fTitle = title;
}
- (void) UpdateBitrate
{
int64_t available;
available = (int64_t) [self intValue] * 1024 * 1024;
/* AVI headers */
available -= 2048;
/* Video chunk headers (8 bytes / frame)
and index (16 bytes / frame) */
available -= 24 * fTitle->length * fTitle->rate / fTitle->rateBase;
/* Audio tracks */
available -= ( ( [[fSecondaryLanguagePopUp titleOfSelectedItem]
compare: @"None"] == NSOrderedSame ) ? 1 : 2 ) *
( fTitle->length *
[[fAudioBitratePopUp titleOfSelectedItem] intValue] *
128 + 24 * fTitle->length * 44100 / 1152 );
if( available < 0 )
{
[fBitrateField setIntValue: 0];
}
else
{
[fBitrateField setIntValue:
available / ( 128 * fTitle->length )];
}
}
@end
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