-/*
- * Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2007 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file mood.c Paraslash's mood handling functions. */
#include "afh.h"
#include "afs.h"
#include "list.h"
-#include "ipc.h"
#include "mm.h"
-#include "sideband.h"
#include "mood.h"
-#include "sched.h"
+
+/*
+ * Mood parser API. It's overkill to have an own header file for
+ * these declarations as they are only needed in this .c file.
+ */
+struct mp_context;
+int mp_init(const char *definition, int nbytes, struct mp_context **result,
+ char **errmsg);
+bool mp_eval_row(const struct osl_row *aft_row, struct mp_context *ctx);
+void mp_shutdown(struct mp_context *ctx);
/**
* Contains statistical data of the currently admissible audio files.
struct list_head mood_item_node;
};
-/**
- * Created from the mood definition by mood_open().
+/*
+ * Created from the mood definition by \ref change_current_mood().
*
* When a mood is opened, each line of its definition is investigated, and a
- * corresponding mood item is produced. Each mood line starts with \p accept,
- * \p deny, or \p score which determines the type of the mood line. For each
- * such type a linked list is maintained whose entries are the mood items.
- *
- * \sa mood_item, mood_open().
+ * corresponding mood item is produced. Each mood line starts with accept,
+ * deny, or score which determines the type of the mood line. For each such
+ * type a linked list is maintained whose entries are the mood items.
*/
struct mood {
/** The name of this mood. */
struct list_head deny_list;
/** The list of mood items of type \p score. */
struct list_head score_list;
+ /* Only used for version 2 moods. */
+ struct mp_context *parser_context;
};
/*
* If current_mood is NULL then no mood is currently open. If
- * current_mood->name is NULL, the dummy mood is currently open
+ * current_mood->name is NULL, the dummy mood is currently open.
*/
static struct mood *current_mood;
-/**
- * Rough approximation to sqrt.
+/*
+ * Find the position of the most-significant set bit.
*
- * \param x Integer of which to calculate the sqrt.
+ * Copied and slightly adapted from the linux source tree, version 4.9.39
+ * (2017-07).
+ */
+__a_const static uint32_t fls64(uint64_t v)
+{
+ int n = 63;
+ const uint64_t ones = ~(uint64_t)0U;
+
+ if ((v & (ones << 32)) == 0) {
+ n -= 32;
+ v <<= 32;
+ }
+ if ((v & (ones << (64 - 16))) == 0) {
+ n -= 16;
+ v <<= 16;
+ }
+ if ((v & (ones << (64 - 8))) == 0) {
+ n -= 8;
+ v <<= 8;
+ }
+ if ((v & (ones << (64 - 4))) == 0) {
+ n -= 4;
+ v <<= 4;
+ }
+ if ((v & (ones << (64 - 2))) == 0) {
+ n -= 2;
+ v <<= 2;
+ }
+ if ((v & (ones << (64 - 1))) == 0)
+ n -= 1;
+ return n;
+}
+
+/*
+ * Compute the integer square root floor(sqrt(x)).
*
- * \return An integer res with res * res <= x.
+ * Taken 2007 from the linux source tree.
*/
__a_const static uint64_t int_sqrt(uint64_t x)
{
- uint64_t op, res, one = 1;
- op = x;
- res = 0;
-
- one = one << 62;
- while (one > op)
- one >>= 2;
+ uint64_t op = x, res = 0, one = 1;
+ one = one << (fls64(x) & ~one);
while (one != 0) {
if (op >= res + one) {
op = op - (res + one);
- res = res + 2 * one;
+ res = res + 2 * one;
}
res /= 2;
one /= 4;
}
-// PARA_NOTICE_LOG("sqrt(%llu) = %llu\n", x, res);
return res;
}
}
/* returns 1 if row admissible, 0 if not, negative on errors */
-static int compute_mood_score(const struct osl_row *aft_row, struct mood *m,
- long *result)
+static int row_is_admissible(const struct osl_row *aft_row, struct mood *m,
+ long *scorep)
{
struct mood_item *item;
int ret;
if (!m)
return -E_NO_MOOD;
+ if (m->parser_context) {
+ *scorep = 0;
+ return mp_eval_row(aft_row, m->parser_context);
+ }
ret = get_afsi_of_row(aft_row, &afsi);
- if (ret< 0)
+ if (ret < 0)
return ret;
ret = get_afhi_of_row(aft_row, &afhi);
- if (ret< 0)
+ if (ret < 0)
return ret;
ret = get_audio_file_path_of_row(aft_row, &path);
- if (ret< 0)
+ if (ret < 0)
return ret;
/* reject audio file if it matches any entry in the deny list */
list_for_each_entry(item, &m->deny_list, mood_item_node) {
}
if (score_arg_sum)
score /= score_arg_sum;
- *result = score;
+ *scorep = score;
return 1;
}
list_for_each_entry_safe(item, tmp, &m->score_list, mood_item_node)
cleanup_list_entry(item);
free(m->name);
+ mp_shutdown(m->parser_context);
free(m);
}
* <score> is either an integer or "random" which assigns a random score to
* all matching files
*/
-
static int parse_mood_line(char *mood_line, void *data)
{
struct mood_line_parser_data *mlpd = data;
ret = 1;
out:
free_argv(argv);
- if (ret >= 0)
- return ret;
- if (mi) {
+ if (mi && (ret < 0 || !mlpd->m)) { /* mi was not added to any list */
free(mi->parser_data);
free(mi);
}
return ret;
}
-static int load_mood(const struct osl_row *mood_row, struct mood **m)
+static int load_mood(const struct osl_row *mood_row, struct mood **m,
+ char **errmsg)
{
char *mood_name;
struct osl_object mood_def;
*m = NULL;
ret = mood_get_name_and_def_by_row(mood_row, &mood_name, &mood_def);
- if (ret < 0)
+ if (ret < 0) {
+ if (errmsg)
+ *errmsg = make_message(
+ "could not read mood definition");
return ret;
- if (!*mood_name)
- return -E_DUMMY_ROW;
+ }
+ assert(*mood_name);
mlpd.m = alloc_new_mood(mood_name);
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) {
- PARA_ERROR_LOG("unable to load mood %s: %s\n", mlpd.m->name,
- para_strerror(-ret));
- destroy_mood(mlpd.m);
- return ret;
+ PARA_INFO_LOG("opening version 2 mood %s\n", mlpd.m->name);
+ ret = mp_init(mood_def.data, mood_def.size, &mlpd.m->parser_context,
+ errmsg);
+ if (ret < 0)
+ destroy_mood(mlpd.m);
+ } else {
+ PARA_WARNING_LOG("loaded version 1 mood %s\n", mlpd.m->name);
+ PARA_WARNING_LOG("please convert to version 2\n");
+ ret = 1;
}
- *m = mlpd.m;
- return 1;
+ osl_close_disk_object(&mood_def);
+ if (ret >= 0)
+ *m = mlpd.m;
+ return ret;
}
static int check_mood(struct osl_row *mood_row, void *data)
}
if (!*mood_name) /* ignore dummy row */
goto out;
- 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, "mood %s: error in line %u: %s\n", mood_name,
- mlpd.line_num, para_strerror(-ret));
+ if (ret < 0) {
+ char *errmsg;
+ struct mood *m = alloc_new_mood("check");
+ ret = mp_init(mood_def.data, mood_def.size, &m->parser_context,
+ &errmsg);
+ if (ret < 0) {
+ para_printf(pb, "%s: %s\n", mood_name, errmsg);
+ free(errmsg);
+ para_printf(pb, "%s\n", para_strerror(-ret));
+ } else
+ destroy_mood(m);
+ } else {
+ para_printf(pb, "%s: v1 mood, please convert to v2\n",
+ mood_name);
+
+ }
ret = 1; /* don't fail the loop on invalid mood definitions */
out:
osl_close_disk_object(&mood_def);
return 1;
}
-/**
- * Structure used during mood_open().
- *
+/*
* 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
* 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.
*/
struct admissible_file_info
{
int ret;
long score = 0;
- ret = compute_mood_score(aft_row, aa->m, &score);
+ ret = row_is_admissible(aft_row, aa->m, &score);
if (ret <= 0)
return ret;
if (statistics.num >= aa->size) {
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 update_afs_statistics(struct afs_info *old_afsi,
+ struct afs_info *new_afsi)
{
unsigned n;
int ret = get_num_admissible_files(&n);
*
* \return Positive on success, negative on errors.
*
- * \sa score_delete().
+ * \sa \ref score_delete().
*/
static int mood_delete_audio_file(const struct osl_row *aft_row)
{
if (ret < 0)
return ret;
was_admissible = ret;
- ret = compute_mood_score(aft_row, current_mood, &score);
+ ret = row_is_admissible(aft_row, current_mood, &score);
if (ret < 0)
return ret;
is_admissible = (ret > 0);
/**
* Close the current mood.
*
- * Free all resources of the current mood which were allocated during
- * mood_open().
+ * Frees all resources of the current mood.
*/
void close_current_mood(void)
{
* Change the current mood.
*
* \param mood_name The name of the mood to open.
+ * \param errmsg Error description 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.
*
* \return Positive on success, negative on errors. Loading the dummy mood
* always succeeds.
*
- * \sa struct admissible_file_info, struct admissible_array, struct
- * afs_info::last_played, mood_close().
+ * \sa struct \ref afs_info::last_played, \ref mp_eval_row().
*/
-int change_current_mood(const char *mood_name)
+int change_current_mood(const char *mood_name, char **errmsg)
{
int i, ret;
struct admissible_array aa = {
};
ret = osl(osl_get_row(moods_table, BLOBCOL_NAME, &obj, &row));
if (ret < 0) {
- PARA_NOTICE_LOG("no such mood: %s\n", mood_name);
+ if (errmsg)
+ *errmsg = make_message("no such mood: %s",
+ mood_name);
return ret;
}
- ret = load_mood(row, &m);
+ ret = load_mood(row, &m, errmsg);
if (ret < 0)
return ret;
close_current_mood();
aa.m = current_mood;
PARA_NOTICE_LOG("computing statistics of admissible files\n");
ret = audio_file_loop(&aa, add_if_admissible);
- if (ret < 0)
+ if (ret < 0) {
+ if (errmsg)
+ *errmsg = make_message("audio file loop failed");
return ret;
+ }
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);
- if (ret < 0)
+ if (ret < 0) {
+ if (errmsg)
+ *errmsg = make_message(
+ "could not add row to score table");
goto out;
+ }
}
log_statistics();
ret = statistics.num;
free(aa.array);
return ret;
}
-/**
+
+/*
* Close and re-open the current mood.
*
- * This function is used if changes to the audio file table or the
- * attribute table were made that render the current list of admissible
- * files useless. For example, if an attribute is removed from the
- * attribute table, this function is called.
- *
- * \return Positive on success, negative on errors. If no mood is currently
- * open, the function returns success.
+ * This function is called on events which render the current list of
+ * admissible files useless, for example if an attribute is removed from the
+ * attribute table.
*
- * \sa mood_open(), mood_close().
+ * If no mood is currently open, the function returns success.
*/
static int reload_current_mood(void)
{
if (current_mood->name)
mood_name = para_strdup(current_mood->name);
close_current_mood();
- ret = change_current_mood(mood_name);
+ ret = change_current_mood(mood_name, NULL);
free(mood_name);
return ret;
}
projects / paraslash.git / blobdiff