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/*
* This file is part of mplayer.
*
* mplayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mplayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mplayer. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include "config.h"
#include "playlist.h"
#include "mpcommon.h"
#include "talloc.h"
#include "path.h"
struct playlist_entry *playlist_entry_new(const char *filename)
{
struct playlist_entry *e = talloc_zero(NULL, struct playlist_entry);
e->filename = talloc_strdup(e, filename);
return e;
}
void playlist_entry_add_param(struct playlist_entry *e, bstr name, bstr value)
{
struct playlist_param p = {bstrdup(e, name), bstrdup(e, value)};
MP_TARRAY_APPEND(e, e->params, e->num_params, p);
}
void playlist_entry_add_params(struct playlist_entry *e,
struct playlist_param *params,
int num_params)
{
for (int n = 0; n < num_params; n++)
playlist_entry_add_param(e, params[n].name, params[n].value);
}
// Add entry "add" after entry "after".
// If "after" is NULL, add as first entry.
// Post condition: add->prev == after
void playlist_insert(struct playlist *pl, struct playlist_entry *after,
struct playlist_entry *add)
{
assert(pl && add->pl == NULL && add->next == NULL && add->prev == NULL);
if (after) {
assert(after->pl == pl);
assert(pl->first && pl->last);
}
add->prev = after;
if (after) {
add->next = after->next;
after->next = add;
} else {
add->next = pl->first;
pl->first = add;
}
if (add->next) {
add->next->prev = add;
} else {
pl->last = add;
}
add->pl = pl;
talloc_steal(pl, add);
}
void playlist_add(struct playlist *pl, struct playlist_entry *add)
{
playlist_insert(pl, pl->last, add);
}
static void playlist_unlink(struct playlist *pl, struct playlist_entry *entry)
{
assert(pl && entry->pl == pl);
if (pl->current == entry) {
pl->current = entry->next;
pl->current_was_replaced = true;
}
if (entry->next) {
entry->next->prev = entry->prev;
} else {
pl->last = entry->prev;
}
if (entry->prev) {
entry->prev->next = entry->next;
} else {
pl->first = entry->next;
}
entry->next = entry->prev = NULL;
// xxx: we'd want to reset the talloc parent of entry
entry->pl = NULL;
}
void playlist_remove(struct playlist *pl, struct playlist_entry *entry)
{
playlist_unlink(pl, entry);
talloc_free(entry);
}
void playlist_clear(struct playlist *pl)
{
while (pl->first)
playlist_remove(pl, pl->first);
assert(!pl->current);
pl->current_was_replaced = false;
}
void playlist_add_file(struct playlist *pl, const char *filename)
{
playlist_add(pl, playlist_entry_new(filename));
}
static int playlist_count(struct playlist *pl)
{
int c = 0;
for (struct playlist_entry *e = pl->first; e; e = e->next)
c++;
return c;
}
void playlist_shuffle(struct playlist *pl)
{
struct playlist_entry *save_current = pl->current;
bool save_replaced = pl->current_was_replaced;
int count = playlist_count(pl);
struct playlist_entry **arr = talloc_array(NULL, struct playlist_entry *,
count);
for (int n = 0; n < count; n++) {
arr[n] = pl->first;
playlist_unlink(pl, pl->first);
}
for (int n = 0; n < count; n++) {
int other = (int)((double)(count) * rand() / (RAND_MAX + 1.0));
struct playlist_entry *tmp = arr[n];
arr[n] = arr[other];
arr[other] = tmp;
}
for (int n = 0; n < count; n++)
playlist_add(pl, arr[n]);
talloc_free(arr);
pl->current = save_current;
pl->current_was_replaced = save_replaced;
}
struct playlist_entry *playlist_get_next(struct playlist *pl, int direction)
{
assert(direction == -1 || direction == +1);
if (!pl->current)
return NULL;
assert(pl->current->pl == pl);
if (direction < 0)
return pl->current->prev;
return pl->current_was_replaced ? pl->current : pl->current->next;
}
void playlist_add_base_path(struct playlist *pl, bstr base_path)
{
if (base_path.len == 0 || bstrcmp0(base_path, ".") == 0)
return;
for (struct playlist_entry *e = pl->first; e; e = e->next) {
char *new_file = mp_path_join(e, base_path, bstr0(e->filename));
talloc_free(e->filename);
e->filename = new_file;
}
}
// Move all entries from source_pl to pl, appending them at the end of pl.
// source_pl will be empty, and all entries have changed ownership to pl.
void playlist_transfer_entries(struct playlist *pl, struct playlist *source_pl)
{
while (source_pl->first) {
struct playlist_entry *e = source_pl->first;
playlist_unlink(source_pl, e);
playlist_add(pl, e);
}
}
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