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[MAD Input] Don't do full file scans on CBR files 

Only do a rough estimation on files without Xing or LAME or iTunes
headers. This is much faster, even if less accurate, and may include
the footer tag if present.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
swiftingly
Christopher Snowhill 2022-06-12 16:09:56 -07:00
parent a4f40971dd
commit b675ced77b
1 changed files with 10 additions and 6 deletions
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16
Plugins/MAD/MADDecoder.m
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@ -87,8 +87,6 @@
_fileSize = [_source tell];
[_source seek:0 whence:SEEK_SET];
mad_timer_t duration = { 0, 0 };
for(;;) {
[self bufferRefill:&stream];
@ -354,14 +352,18 @@
break;
}
}
} else if(_foundiTunSMPB) {
} else if(_foundXingHeader || _foundiTunSMPB) {
break;
} else if(framesDecoded > 1) {
break;
}
mad_timer_add(&duration, frame.header.duration);
}
if(!_foundiTunSMPB && (!_foundXingHeader || !_foundLAMEHeader)) {
if(!_foundiTunSMPB && !_foundXingHeader) {
// Now do CBR estimation instead of full file scanning
size_t frameCount = (_fileSize - id3_length) / (stream.next_frame - stream.this_frame);
mad_timer_t duration = frame.header.duration;
mad_timer_multiply(&duration, frameCount);
totalFrames = mad_timer_count(duration, sampleRate);
}
@ -388,6 +390,8 @@
_firstFrame = YES;
_outputFrames = 0;
_startPadding = 0;
_endPadding = 0;
// DLog(@"OPEN: %i", _firstFrame);
inputEOF = NO;