/*
- * Copyright (C) 2007-2012 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include "ipc.h"
#include "mm.h"
#include "sideband.h"
+#include "mood.h"
/**
* Contains statistical data of the currently admissible audio files.
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;
if (!*mood_name)
return -E_DUMMY_ROW;
mlpd.m = alloc_new_mood(mood_name);
- ret = for_each_line_ro(mood_def.data, mood_def.size,
+ ret = for_each_line(FELF_READ_ONLY, mood_def.data, mood_def.size,
parse_mood_line, &mlpd);
osl_close_disk_object(&mood_def);
if (ret < 0) {
int ret = mood_get_name_and_def_by_row(mood_row, &mood_name, &mood_def);
if (ret < 0) {
- para_printf(pb, "failed to get mood definition: %s\n",
- para_strerror(-ret));
+ para_printf(pb, "cannot read mood\n");
return ret;
}
if (!*mood_name) /* ignore dummy row */
goto out;
- ret = para_printf(pb, "checking mood %s...\n", mood_name);
- if (ret < 0)
- goto out;
- ret = for_each_line_ro(mood_def.data, mood_def.size,
+ para_printf(pb, "checking mood %s...\n", mood_name);
+ ret = for_each_line(FELF_READ_ONLY, mood_def.data, mood_def.size,
parse_mood_line, &mlpd);
if (ret < 0)
- para_printf(pb, "%s line %u: %s\n", mood_name, mlpd.line_num,
- para_strerror(-ret));
+ para_printf(pb, "mood %s: error in line %u: %s\n", mood_name,
+ mlpd.line_num, para_strerror(-ret));
+ ret = 1; /* don't fail the loop on invalid mood definitions */
out:
osl_close_disk_object(&mood_def);
return ret;
/**
* Check all moods for syntax errors.
*
- * \param fd The afs socket.
- * \param query Unused.
+ * \param aca Only ->pbout is used for diagnostics.
+ *
+ * \return Negative on fatal errors. Inconsistent mood definitions are not
+ * considered an error.
*/
-void mood_check_callback(int fd, __a_unused const struct osl_object *query)
-{
- struct para_buffer pb = {
- .max_size = shm_get_shmmax(),
- .private_data = &(struct afs_max_size_handler_data) {
- .fd = fd,
- .band = SBD_OUTPUT
- },
- .max_size_handler = afs_max_size_handler
- };
-
- int ret = para_printf(&pb, "checking moods...\n");
- if (ret < 0)
- return;
- osl_rbtree_loop(moods_table, BLOBCOL_ID, &pb,
- check_mood);
- if (pb.offset)
- pass_buffer_as_shm(fd, SBD_OUTPUT, pb.buf, pb.offset);
- free(pb.buf);
-}
-
-#if 0
-static unsigned int_log2(uint64_t x)
+int mood_check_callback(struct afs_callback_arg *aca)
{
- unsigned res = 0;
-
- while (x) {
- x /= 2;
- res++;
- }
- return res;
+ para_printf(&aca->pbout, "checking moods...\n");
+ return osl(osl_rbtree_loop(moods_table, BLOBCOL_ID, &aca->pbout,
+ check_mood));
}
-#endif
static int64_t normalized_value(int64_t x, int64_t n, int64_t sum, int64_t qd)
{
if (!n || !qd)
return 0;
- return 100 * (n * x - sum) / (int64_t)int_sqrt(n * qd);
+ return 100 * (n * x - sum) / (int64_t)int_sqrt(n) / (int64_t)int_sqrt(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(const struct osl_row *aft_row)
-{
- struct afs_info afsi;
- int64_t score, nscore = 0, lscore = 0;
- int ret;
-
- ret = get_afsi_of_row(aft_row, &afsi);
- if (ret < 0)
- return -100;
- nscore = compute_num_played_score(&afsi);
- lscore = compute_last_played_score(&afsi);
- score = nscore + lscore;
- return score;
+ return mood_score / 3;
}
static int add_afs_statistics(const struct osl_row *row)
{
- uint64_t n, x, s;
+ uint64_t n, x, s, q;
struct afs_info afsi;
int ret;
n = statistics.num;
x = afsi.last_played;
s = statistics.last_played_sum;
- if (n > 0)
- statistics.last_played_qd += (x - s / n) * (x - s / n) * n / (n + 1);
+ if (n > 0) {
+ q = (x > s / n)? x - s / n : s / n - x;
+ statistics.last_played_qd += q * q * n / (n + 1);
+ }
statistics.last_played_sum += x;
x = afsi.num_played;
s = statistics.num_played_sum;
- if (n > 0)
- statistics.num_played_qd += (x - s / n) * (x - s / n) * n / (n + 1);
+ if (n > 0) {
+ q = (x > s / n)? x - s / n : s / n - x;
+ statistics.num_played_qd += q * q * n / (n + 1);
+ }
statistics.num_played_sum += x;
statistics.num++;
return 1;
/**
* 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.
*/
* the last number a_n was replaced by b) may be computed in O(1) time in terms
* of n, q, a_n, b, and S as
*
- * q' = q + d * s - (2 * S + d) * d / n,
+ * q' = q + d * s - (2 * S + d) * d / n
+ * = q + d * (s - 2 * S / n - d /n),
*
* where d = b - a_n, and s = b + a_n.
*
{
int64_t delta = new_val - old_val;
int64_t sigma = new_val + old_val;
- return old_qd + delta * sigma - (2 * old_sum + delta) * delta / n;
+ return old_qd + delta * (sigma - 2 * old_sum / n - delta / n);
}
static int update_afs_statistics(struct afs_info *old_afsi, struct afs_info *new_afsi)
static int add_to_score_table(const struct osl_row *aft_row, long mood_score)
{
- long score = (compute_dynamic_score(aft_row) + mood_score) / 3;
+ long score;
+ struct afs_info afsi;
+ int ret = get_afsi_of_row(aft_row, &afsi);
+
+ if (ret < 0)
+ return ret;
+ score = compute_score(&afsi, mood_score);
return score_add(aft_row, score);
}
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)
* \sa struct admissible_file_info, struct admissible_array, struct
* afs_info::last_played, mood_close().
*/
-int change_current_mood(char *mood_name)
+int change_current_mood(const char *mood_name)
{
int i, ret;
struct admissible_array aa = {
struct mood *m;
struct osl_row *row;
struct osl_object obj = {
- .data = mood_name,
+ .data = (char *)mood_name,
.size = strlen(mood_name) + 1
};
ret = osl(osl_get_row(moods_table, BLOBCOL_NAME, &obj, &row));
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);
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?
* This function performs actions required due to the occurrence of the given
* event. Possible actions include reload of the current mood and update of the
* score of an audio file.
+ *
+ * \return Standard.
*/
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) {
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:
projects / paraslash.git / blobdiff