};
/**
- * Stores an instance of an open mood (parser and statistics).
+ * Stores an instance of a loaded mood (parser and statistics).
*
- * A structure of this type is allocated and initialized at mood open time.
+ * A structure of this type is allocated and initialized when a mood is loaded.
*/
-struct mood {
+struct mood_instance {
/** NULL means that this is the "dummy" mood. */
char *name;
/** Bison's abstract syntax tree, used to determine admissibility. */
};
/*
- * If current_mood is NULL then no mood is currently open. If
- * current_mood->name is NULL, the dummy mood is currently open.
+ * If current_mood is NULL then no mood is currently loaded. If
+ * current_mood->name is NULL, the current mood is the dummy mood.
*
* The statistics are adjusted dynamically through this pointer as files are
* added, removed or played.
*/
-static struct mood *current_mood;
+static struct mood_instance *current_mood;
/*
* Find the position of the most-significant set bit.
return res;
}
-static void destroy_mood(struct mood *m)
+static void destroy_mood(struct mood_instance *m)
{
if (!m)
return;
free(m);
}
-static struct mood *alloc_new_mood(const char *name)
+static struct mood_instance *alloc_new_mood(const char *name)
{
- struct mood *m = zalloc(sizeof(struct mood));
+ struct mood_instance *m = zalloc(sizeof(*m));
+
if (name)
m->name = para_strdup(name);
m->stats.normalization_divisor = 1;
return m;
}
-static int init_mood_parser(const char *mood_name, struct mood **m, char **err)
+static int init_mood_parser(const char *mood_name, struct mood_instance **m,
+ char **err)
{
struct osl_object mood_def;
int ret;
return ret;
}
*m = alloc_new_mood(mood_name);
- PARA_INFO_LOG("opening mood %s\n", mood_name);
+ PARA_INFO_LOG("loading mood %s\n", mood_name);
ret = mp_init(mood_def.data, mood_def.size, &(*m)->parser_context, err);
osl_close_disk_object(&mood_def);
if (ret < 0)
struct para_buffer *pb = data;
char *mood_name, *errmsg;
struct osl_object mood_def;
- struct mood *m;
+ struct mood_instance *m;
int ret = mood_get_name_and_def_by_row(mood_row, &mood_name, &mood_def);
if (ret < 0) {
}
/*
- * At mood open time we determine the set of admissible files for the given
+ * At mood load time we determine the set of admissible files for the given
* mood where each file is identified by a pointer to a row of the audio file
* table. In the first pass the pointers are added to a temporary array and
* statistics are computed. When all admissible files have been processed in
*/
struct admissible_array {
/** Files are admissible wrt. this mood. */
- struct mood *m;
+ struct mood_instance *m;
/** The size of the array */
unsigned size;
/** Pointer to the array of admissible files. */
}
/* sse: seconds since epoch. */
-static void log_statistics(struct afs_statistics *stats, int64_t sse)
+static char *get_statistics(struct mood_instance *m, int64_t sse)
{
- unsigned n = stats->num;
+ unsigned n = m->stats.num;
int mean_days, sigma_days;
- if (!n) {
- PARA_WARNING_LOG("no admissible files\n");
- return;
- }
- PARA_NOTICE_LOG("%u admissible files\n", stats->num);
- mean_days = (sse - stats->last_played_sum / n) / 3600 / 24;
- sigma_days = int_sqrt(stats->last_played_qd / n) / 3600 / 24;
- PARA_NOTICE_LOG("last_played mean/sigma: %d/%d days\n", mean_days, sigma_days);
- PARA_NOTICE_LOG("num_played mean/sigma: %" PRId64 "/%" PRIu64 "\n",
- stats->num_played_sum / n,
- int_sqrt(stats->num_played_qd / n));
- PARA_NOTICE_LOG("num_played correction factor: %" PRId64 "\n",
- stats->num_played_correction);
- PARA_NOTICE_LOG("last_played correction factor: %" PRId64 "\n",
- stats->last_played_correction);
- PARA_NOTICE_LOG("normalization divisor: %" PRId64 "\n",
- stats->normalization_divisor);
+ mean_days = (sse - m->stats.last_played_sum / n) / 3600 / 24;
+ sigma_days = int_sqrt(m->stats.last_played_qd / n) / 3600 / 24;
+ return make_message(
+ "loaded mood %s (%u files)\n"
+ "last_played mean/sigma: %d/%d days\n"
+ "num_played mean/sigma: %" PRId64 "/%" PRIu64 "\n"
+ ,
+ m->name? m->name : "(dummy)",
+ n,
+ mean_days, sigma_days,
+ m->stats.num_played_sum / n,
+ int_sqrt(m->stats.num_played_qd / n)
+ );
}
-/**
- * Close the current mood.
- *
- * Frees all resources of the current mood.
- */
-void close_current_mood(void)
+/** Free all resources of the current mood, if any. */
+void mood_unload(void)
{
destroy_mood(current_mood);
current_mood = NULL;
/**
* Change the current mood.
*
- * \param mood_name The name of the mood to open.
- * \param errmsg Error description is returned here.
+ * \param mood_name The name of the mood to load.
+ * \param msg Error message or mood info is returned here.
*
* If \a mood_name is \a NULL, load the dummy mood that accepts every audio file
* and uses a scoring method based only on the \a last_played information.
*
- * The errmsg pointer may be NULL, in which case no error message will be
- * returned. If a non-NULL pointer is given, the caller must free *errmsg.
- *
- * If there is already an open mood, it will be closed first.
+ * If the message pointer is not NULL, a suitable message is returned there in
+ * all cases. The caller must free this string.
*
- * \return Positive on success, negative on errors.
+ * \return The number of admissible files on success, negative on errors. It is
+ * not considered an error if no files are admissible.
*
* \sa struct \ref afs_info::last_played, \ref mp_eval_row().
*/
-int mood_switch(const char *mood_name, char **errmsg)
+int mood_load(const char *mood_name, char **msg)
{
int i, ret;
struct admissible_array aa = {.size = 0};
struct timeval rnow;
if (mood_name) {
- ret = init_mood_parser(mood_name, &aa.m, errmsg);
+ ret = init_mood_parser(mood_name, &aa.m, msg);
if (ret < 0)
return ret;
} else /* load dummy mood */
PARA_NOTICE_LOG("computing statistics of admissible files\n");
ret = audio_file_loop(&aa, add_if_admissible);
if (ret < 0) {
- if (errmsg)
- *errmsg = make_message("audio file loop failed");
+ if (msg) /* false if we are called via the event handler */
+ *msg = make_message("audio file loop failed\n");
goto out;
}
clock_get_realtime(&rnow);
compute_correction_factors(rnow.tv_sec, &aa.m->stats);
- log_statistics(&aa.m->stats, rnow.tv_sec);
+ if (aa.m->stats.num == 0) {
+ if (msg)
+ *msg = make_message("no admissible files\n");
+ ret = 0;
+ goto out;
+ }
for (i = 0; i < aa.m->stats.num; i++) {
ret = add_to_score_table(aa.array[i], &aa.m->stats);
if (ret < 0) {
- if (errmsg)
- *errmsg = make_message(
- "could not add row to score table");
+ if (msg)
+ *msg = make_message(
+ "could not add row to score table\n");
goto out;
}
}
/* success */
- close_current_mood();
- current_mood = aa.m;
- PARA_NOTICE_LOG("loaded mood %s\n", mood_name? mood_name : "(dummy)");
+ if (msg)
+ *msg = get_statistics(aa.m, rnow.tv_sec);
ret = aa.m->stats.num;
+ mood_unload();
+ current_mood = aa.m;
out:
free(aa.array);
if (ret < 0)
}
/*
- * Close and re-open the current mood.
+ * Empty the score table and start over.
*
* This function is called on events which render the current list of
* admissible files useless, for example if an attribute is removed from the
char *mood_name = NULL;
assert(current_mood);
- ret = clear_score_table();
- if (ret < 0)
- return ret;
+ score_clear();
PARA_NOTICE_LOG("reloading %s\n", current_mood->name?
current_mood->name : "(dummy)");
if (current_mood->name)
mood_name = para_strdup(current_mood->name);
- close_current_mood();
- ret = mood_switch(mood_name, NULL);
+ mood_unload();
+ ret = mood_load(mood_name, NULL);
free(mood_name);
return ret;
}
projects / paraslash.git / blobdiff