Patch to enable WMA bitrate limiting for software players

[ralphy]

Here's a patch for LMS 7.8 that enables WMA bitrate limiting on players that don't support native WMA. (ie. SqueezeSlave, SqueezePlayer, iPeng, SqueezePlay, SoftSqueeze, etc).

Instead of LMS streaming WMA as FLAC, which is nearly impossible over 3G, the server will transcode to mp3 at the bitrate limit set in the player settings, just like it does for all the other formats.

I've tested the change using WMA internet radio streams, local WMA files and the Not So Sirius plugin in Canada.

Hardware players with native wma decoding continue to receive the wma stream if the bit rate is below or equal to the players current bitrate limit setting.

--- Slim/Player/TranscodingHelper.pm.orig       2012-03-19 10:12:43.000000000 -0400
+++ Slim/Player/TranscodingHelper.pm    2012-05-30 13:26:49.000000000 -0400
@@ -569,10 +569,18 @@
 
        return 0 unless $maxRate;
 
+       my $native = 0;
+       foreach my $format ($client->formats()) {
+               if (defined($type) && $type eq $format) {
+                       $native = 1;
+                       last;
+               }
+       }
+
        # If the input type is mp3 or wma (bug 9641), we determine whether the 
-       # input bitrate is under the maximum.
+       # input bitrate is under the maximum, only if the player supports the format natively.
        # We presume that we won't choose an output format that violates the rate limit.
-       if (defined($type) && ($type eq 'mp3' || $type eq 'wma')) {
+       if (defined($type) && ($type eq 'mp3' || $type eq 'wma') && $native) {
                return 0 if ($maxRate >= ($bitrate || 0)/1000);
        }