[Flac-dev] --until decodes rest of file?

[Donald Gordon]

On Fri, 7 Nov 2003 11:42:05 -0800 (PST) Josh Coalson <xflac at yahoo.com> wrote:

> sorry about the delay on this one...
> 
> do you have a sample flac file that you can host that exhibits
> the problem?

Ha.  The flac files used in the examples below were of entire audio CDs;
due to my use of "time" to demostrate the problem I need a fairly large
file.

I can simulate the problem by creating a dummy test file:

----
donald at klatch:~$ dd if=/dev/zero bs=1048576 count=100 | flac -o test.flac --endian=little --channels=2 --bps=16 --sample-rate=44100 --sign=signed --force-raw-format -
 
flac 1.1.0, Copyright (C) 2000,2001,2002,2003 Josh Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.
 
options: -P 4096 -b 4608 -m -l 8 -q 0 -r 3,3
(No runtime statistics possible; please wait for encoding to finish...)
100+0 records in
100+0 records out
104857600 bytes transferred in 6.731431 seconds (15577312 bytes/sec)
----

which will then exhibit the same problem -- it will take as long to
decode the first million samples as the entire file:

----
donald at klatch:~$ time flac -d -o - test.flac >/dev/null
 
flac 1.1.0, Copyright (C) 2000,2001,2002,2003 Josh Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.
 
test.flac: done
 
real    0m12.367s
user    0m9.290s
sys     0m0.820s
donald at klatch:~$ time flac -d -o - --until=+1048576 test.flac >/dev/null
 
flac 1.1.0, Copyright (C) 2000,2001,2002,2003 Josh Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.
 
test.flac: done
 
real    0m10.339s
user    0m8.360s
sys     0m0.610s
----

donald