Dump all archive plugins, even those that fail to initialise.

Don't require the caller to provide them.

g_file_test is redefined to be g_file_test_utf8 and thus can't handle
non-ASCII characters. This fix adds simple wrapper (taken from glib)
that fixes encoding and calls g_file_test_utf8. All required inclusions
of glib_compat.h are added as well.

False positives in gcc 4.7.

"Frame skipped" might cause the impression that the decoding of a whole
song failed.

Add the encoder_plugin method end().  This is important for the
recorder plugin.

Don't reset the ogg_stream_state object, because this discards the
end-of-stream packet that was just added.

g_basename() is deprecated in GLib 2.32.

g_basename() is deprecated in GLib 2.32.  Instead, verify that the
suffix does not have a backslash, to catch Windows path names.

The existing buffer implementation has a major flaw: it is unable to
re-fill the buffer until it has been consumed completely, leading to
many occasions where the render callback needs to generate silence,
just because the play() implementation was unable to append more
data.  The fifo_buffer library handles that well.

When adding or updating a song, we get a log message even if debug is not
enabled. It seems odd that removing a song shouldn't be done at the same log
level; otherwise looking at the log leads you to believe songs are never
removed from the library on update.
Signed-off-by: Dan McGee <dan@archlinux.org>

Some compilers are very picky, but we really aren't interested in the
return value.

This might break older versions, I didn't test.

Fixes endless loop when the last line of a text file was not
terminated (bug 3470).

This was disabled when compiled with a new ffmpeg version.  Older
ffmpeg versions used it explicitly, while newer ones may pass it
through from the codec.

This fixes seeking in the vorbis decoder during MPD startup.

This fixes a bug when libsamplerate returns an empty buffer for a very
small input buffer.  The caller thinks this is an error, bug there is
no GError object.

pcm_buffer_get() cannot ever return NULL.