audiod_command.c: Trivial whitespace fix.

[paraslash.git] / mood.c

diff --git a/mood.c b/mood.c
index 465a48e4efd1df830ac6dff59503e7259f9215f7..94deff4684c5a335d38f5b843e22a4cee7dbc880 100644 (file)
--- a/mood.c
+++ b/mood.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2013 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -18,6 +18,7 @@
 #include "ipc.h"
 #include "mm.h"
 #include "sideband.h"
+#include "mood.h"
 
 /**
  * Contains statistical data of the currently admissible audio files.
@@ -29,7 +30,7 @@ struct afs_statistics {
        int64_t num_played_sum;
        /** Sum of last played times over all admissible files. */
        int64_t last_played_sum;
-       /** Quadratic deviation of num played time. */
+       /** Quadratic deviation of num played count. */
        int64_t num_played_qd;
        /** Quadratic deviation of last played time. */
        int64_t last_played_qd;
@@ -462,21 +463,13 @@ static int64_t normalized_value(int64_t x, int64_t n, int64_t sum, int64_t qd)
        return 100 * (n * x - sum) / (int64_t)int_sqrt(n * qd);
 }
 
-static long compute_num_played_score(struct afs_info *afsi)
+static long compute_score(struct afs_info *afsi, long mood_score)
 {
-       return -normalized_value(afsi->num_played, statistics.num,
+       mood_score -= normalized_value(afsi->num_played, statistics.num,
                statistics.num_played_sum, statistics.num_played_qd);
-}
-
-static long compute_last_played_score(struct afs_info *afsi)
-{
-       return -normalized_value(afsi->last_played, statistics.num,
+       mood_score -= normalized_value(afsi->last_played, statistics.num,
                statistics.last_played_sum, statistics.last_played_qd);
-}
-
-static long compute_dynamic_score(struct afs_info *afsi)
-{
-       return compute_num_played_score(afsi) + compute_last_played_score(afsi);
+       return mood_score / 3;
 }
 
 static int add_afs_statistics(const struct osl_row *row)
@@ -542,16 +535,16 @@ static int del_afs_statistics(const struct osl_row *row)
 /**
  * Structure used during mood_open().
  *
- * At mood open time, we look at each file in the audio file table in order to
- * determine whether it is admissible. If a file happens to be admissible, its
- * mood score is computed by calling each relevant mood_score_function. Next,
- * we update the afs_statistics and add a struct admissible_file_info to a
- * temporary array.
+ * At mood open time we determine the set of admissible files for the given
+ * mood. The mood score of each admissible file is computed by adding up all
+ * mood item scores. Next, we update the afs statistics and append a struct
+ * admissible_file_info to a temporary array.
  *
- * If all files have been processed that way, the final score of each
+ * When all files have been processed in this way, the final score of each
  * admissible file is computed by adding the dynamic score (which depends on
- * the afs_statistics) to the mood score.  Finally, all audio files in the
- * array are added to the score table and the admissible array is freed.
+ * the afs_statistics and the current time) to the mood score. Finally, all
+ * audio files in the temporary array are added to the score table and the
+ * array is freed.
  *
  * \sa mood_method, admissible_array.
  */
@@ -674,7 +667,7 @@ static int add_to_score_table(const struct osl_row *aft_row, long mood_score)
 
        if (ret < 0)
                return ret;
-       score = (compute_dynamic_score(&afsi) + mood_score) / 3;
+       score = compute_score(&afsi, mood_score);
        return score_add(aft_row, score);
 }
 
@@ -755,9 +748,7 @@ static int mood_update_audio_file(const struct osl_row *aft_row,
                if (ret < 0)
                        return ret;
        }
-       score += compute_num_played_score(&afsi);
-       score += compute_last_played_score(&afsi);
-       score /= 3;
+       score = compute_score(&afsi, score);
        PARA_DEBUG_LOG("score: %li\n", score);
        percent = (score + 100) / 3;
        if (percent > 100)
@@ -848,7 +839,7 @@ int change_current_mood(char *mood_name)
        if (ret < 0)
                return ret;
        log_statistics();
-       PARA_INFO_LOG("%d admissible files \n", statistics.num);
+       PARA_INFO_LOG("%d admissible files\n", statistics.num);
        for (i = 0; i < statistics.num; i++) {
                struct admissible_file_info *a = aa.array + i;
                ret = add_to_score_table(a->aft_row, a->score);
@@ -879,6 +870,9 @@ static int reload_current_mood(void)
        int ret;
        char *mood_name = NULL;
 
+       ret = clear_score_table();
+       if (ret < 0)
+               return ret;
        if (!current_mood)
                return 1;
        PARA_NOTICE_LOG("reloading %s\n", current_mood->name?
@@ -907,8 +901,6 @@ static int reload_current_mood(void)
 int moods_event_handler(enum afs_events event, __a_unused struct para_buffer *pb,
                void *data)
 {
-       int ret;
-
        if (!current_mood)
                return 0;
        switch (event) {
@@ -921,10 +913,6 @@ int moods_event_handler(enum afs_events event, __a_unused struct para_buffer *pb
        case BLOB_ADD:
                if (data == moods_table || data == playlists_table)
                        return 1; /* no reload necessary for these */
-               ret = clear_score_table();
-               if (ret < 0)
-                       PARA_CRIT_LOG("clear score table returned %s\n",
-                               para_strerror(-ret));
                return reload_current_mood();
        /* these also require reload of the score table */
        case ATTRIBUTE_ADD: