gcrypt: Always initialize result pointer.

[paraslash.git] / web / manual.md

diff --git a/web/manual.md b/web/manual.md
index 3b9c270973b7419b82c7587be912817608c5ddd5..15386134771c2921ecf840347e8179aecc374e1a 100644 (file)
--- a/web/manual.md
+++ b/web/manual.md
@@ -187,7 +187,7 @@ Requirements
 
        git clone git://git.tuebingen.mpg.de/osl
        cd osl && make && sudo make install && sudo ldconfig
-       sudo apt-get install autoconf libssl-dev help2man gengetopt \
+       sudo apt-get install autoconf libssl-dev help2man gengetopt m4 \
               libmad0-dev libid3tag0-dev libasound2-dev libvorbis-dev \
               libfaad-dev libspeex-dev libFLAC-dev libsamplerate-dev realpath \
               libasound2-dev libao-dev libreadline-dev libncurses-dev \
@@ -221,6 +221,9 @@ executables.
 - [help2man](ftp://ftp.gnu.org/pub/gnu/help2man) is used to create
 the man pages.
 
+- [m4](ftp://ftp.gnu.org/pub/gnu/m4/). Some source files are generated
+from templates by the m4 macro processor.
+
 Optional:
 
 - [openssl](http://www.openssl.org/) or
@@ -751,8 +754,8 @@ these commands.
 
 The image, lyrics, moods and playlists tables are all blob tables.
 Blob tables consist of three columns each: The identifier which is
-a positive non-negative number that is auto-incremented, the name
-(an arbitrary string) and the content (the blob).
+a positive number that is auto-incremented, the name (an arbitrary
+string) and the content (the blob).
 
 All blob tables support the same set of actions: cat, ls, mv, rm
 and add. Of course, _add_ is used for adding new blobs to the table
@@ -776,21 +779,19 @@ or playlist is activated with the select command.
 
 ### The score table ###
 
-Unlike all other tables the contents of the score table remain in
-memory and are never stored on disk. The score table contains two
-columns: The SHA1 hash value (of an audio file) and its current
-score.
-
-However, only those files which are admissible for the current mood
-or playlist are contained in the score table. The audio file selector
-always chooses the row with the highest score as the file to stream
-next. While doing so, it computes the new score and updates the
-last_played and the num_played fields in the audio file table.
+The score table describes those audio files which are admissible for
+the current mood or playlist (see below). The table has two columns:
+a pointer to a row of the audio file table and a score value.
 
-The score table is recomputed by the select command which loads a
-mood or playlist. Audio files are chosen for streaming from the rows
-of the score table on a highest-score-first basis.
+Unlike all other tables of the database, the score table remains in
+memory and is never stored on disk. It is initialized at startup and
+recomputed when the select command loads a new mood or playlist.
 
+When the audio file selector is asked to open the next audio file,
+it picks the row with the highest score, opens the corresponding
+file and passes the file descriptor to the virtual streaming system.
+At this point the last_played and the num_played fields of the selected
+file are updated and the score is recomputed.
 
 Playlists and moods
 -------------------
@@ -1825,9 +1826,6 @@ developer machine.
 paraslash development. It is necessary for cloning the git repository
 and for getting updates.
 
-- [m4](ftp://ftp.gnu.org/pub/gnu/m4/). Some input files for gengetopt
-are generated from templates by the m4 macro processor.
-
 - [autoconf](ftp://ftp.gnu.org/pub/gnu/autoconf/) GNU autoconf creates
 the configure file which is shipped in the tarballs but has to be
 generated when compiling from git.