Call decoder_initialize() before entering the loop.  We don't need to
call ov_read() before ov_info().  When the stream number changes,
check if the audio format is still the same.

Use the struct name instead.

This is done by audio_format_init().

Return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED if this input
stream does not support seeking.

Remove the audio_format attribute, add "frame_size" instead.  The
audio_format initialization and check is moved both to
flac_data_get_audio_format().

Use the sample rate stored in the stream_info struct instead of the
audio_format struct.

When calculating the properties of the frame, use sample_rate and
other information from the frame header instead of the stored
audio_format object.

Don't update a float timestamp, this will make imprecisions add up
after a while.  We already have the number of the current frame, let's
just calculate the float timestamp from that for every decoder_data()
command.  For this, we need to add the attribute "first_frame", for
CUE sheet songs.

Removed the "bit_rate" attribute from the flac_data struct.  Pass the
number of bytes since the last call to flac_common_write(), and let
it calculate the bit rate.

We don't want to work with floating point values if possible.  Get the
integer number of frames from the FLAC__StreamMetadata_StreamInfo
object, and convert it into a float duration on demand.  This patch
adds a check if the STREAMINFO packet has been received yet.

Wrapper for FLAC__stream_decoder_process_until_end_of_metadata(),
decoder_initialized().

Convenience wrapper for FLAC__stream_decoder_new() and
FLAC__stream_decoder_set_metadata_respond().

Free the pointer right after its last use, i.e. after the
FLAC__stream_decoder_init_file() call.

Remove the wrapper flac_init().

Use the type and function names of the libFLAC 1.1.3 API.  Map the new
API to the old one with macros.

Don't even try to call it with an old libFLAC API.

Allow those plugins to open large files on 32 bit platforms.

The decoder loop of flac_decode_internal(), flac_container_decode()
and flac_filedecode_internal() is merged into this one function.  This
unifies the code, and uses the frame number to identify the end of a
CUE sub song.

We need this for more exact end-of-subsong detection for CUE files.

If flac_container_decode() gets a seek destination which is out of
range, it ignores the SEEK command (never finishes it).  This leads to
MPD lockup, because the player thread waits for completion.

After the decoder loop, "flac_dec" is always set.

The oggflac plugin has been completely broken for quite a while and
nobody has noticed - maybe we should remove it?

Make the function more generic by not passing "struct flac_data" to
it.

Simple (up-rounding) integer division is good enough.  We're casting
the result back to an integer anyway.

This is a great simplification for flac_common_write(), because we can
convert and submit all of the buffer in one turn.  No more partial
buffers with complicated formulas.

Clean up tag and replay_gain_info there.

That function diverts into various bit formats; it doesn't need a
typed pointer.

Don't use audio_format_sample_size() for identifying the sample
format.

libavformat gives us the song artist in the "author" field.  Since we
use av_metadata_conv(), we don't need to check for "artist".

Convert the metadata with the libavformat function av_metadata_conv().
This ensures that canonical tag names are provided by libavformat, and
we can remove the "artist" vs "author" workaround.

svn r13289 of libvorbis introduced static callbacks (like OV_CALLBACKS_DEFAULT)
defined in "vorbisfile.h" header. First released version with this change is libvorbis-1.2.2.
In libversion-1.2.3 OV_EXCLUDE_STATIC_CALLBACKS define was added to avoid
warnings about unused static callbacks. Information on the OV_EXCLUDE_STATIC_CALLBACKS
can be found in http://svn.xiph.org/trunk/vorbis/CHANGES.