Use replaygain info from cuesheets

[petebueh]

Feature request

My music collection consists of wave-files and is organized with cuesheets. I let MPD scan the cuesheets into its database, which works great.

Looking for a way to have replaygain, i saw that foobar 2000 can write replaygain information into cuesheets, here an example:

REM GENRE A
PERFORMER "Artist"
TITLE "Album"
REM REPLAYGAIN_ALBUM_GAIN -9.55 dB
REM REPLAYGAIN_ALBUM_PEAK 0.991394
FILE "Song1.wav" WAVE
  TRACK 01 AUDIO
    TITLE "Song1"
    PERFORMER "Artist"
    REM REPLAYGAIN_TRACK_GAIN -9.77 dB
    REM REPLAYGAIN_TRACK_PEAK 0.981262
    INDEX 01 00:00:00
FILE "Song2.wav" WAVE
  TRACK 02 AUDIO
    TITLE "Song2"
    PERFORMER "Artist"
    REM REPLAYGAIN_TRACK_GAIN -9.83 dB
    REM REPLAYGAIN_TRACK_PEAK 0.977356
    INDEX 01 00:00:00

Since to my knowledge the wave-format doesn't support replaygain-tags (or tagging at all), this would be a way to bypass this shortcoming.