Translate SampleFormat::DSD to SND_PCM_FORMAT_DSD_U8, which was added
to alsa-lib 1.0.27.1.

The IsActive() method returned true even if the timer was not active,
after it completed once.  This broke the state file timer, and the
state file was not saved periodically.

The plugin was horribly bugged for files that were not stereo.

Read one block at a time.  This discards the last partial block, which
cannot be interleaved anyway.  Previously, uninitialised memory was
used to interleave the last block, which generated some noise.

Same bug as in the previous commit.

When the data chunk size is not a multiple of the frame size, the last
partial frame lead to an endless loop.  We fix this by checking
chunk_sze>=frame instead of chunk_sze>0.  This way, the partial frame
is simply skipped.

Generate more detailed error messages.

In version 11, both ffmpeg and libav deprecate
AVCodecContext::codec_name.  The function avcodec_descriptor_get() has
been introduced long ago.

Stop HTTP clients from exploiting MPD via forged POST requests.

This plugin uses the MP4v2 library to play mp4/m4a files.
It is limited to file_decode.

Previously, only streams were saved with range and tags, but this is
necessary for all "partial" songs (e.g. CUE tracks).

Manipulates the playback range of a queued song.

Fixes the bogus duration of the last track in a CUE sheet.

Previously, MPD tried to slurp the whole song file, count the number
of frames and calculate the song duration from that.  That however is
extremely expensive for remote files, and will delay playback for a
long time.  Workaround: check only the first 128 frames and try to
extrapolate from here.  Fixes Mantis ticket 0004035.

.. instead of InputStream::LockRead(). The former is cancellable.

Implement a "bulk" edit mode that postpones both UpdateQueuedSong()
and OnModified().  This way, the playlist version gets incremented
only once.  More importantly: when adding multiple songs to a queue
that consists of only one song, the first song that got added will
always be played next.  By postponing this choice, all newly added
songs get a chance to become the next song.  Fixes the second (and
last) part of Mantis ticket 0004005.

Don't restore the current song after shufflung when MPD is stopped
(but still remembers the current song internally).  Fixes the first
part of Mantis ticket 0004005.

Addresses Mantis ticket 0004015.

[mk: use decoder_read_full() only when needed, and a few formal
changes]

Works around WAV stream playback bug, because libaudiofile does not
like partial reads (Mantis 0004028).

.. instead of InputStream::LockRead(). The former is cancellable.

(see https://www.xiph.org/vorbis/doc/v-comment.html for Details)