enum playlist_result
playlist_move_range(struct playlist *playlist,
unsigned start, unsigned end, int to)
{
const struct song *queued;
int currentSong;
if (!queue_valid_position(&playlist->queue, start) ||
!queue_valid_position(&playlist->queue, end - 1))
return PLAYLIST_RESULT_BAD_RANGE;
if ((to >= 0 && to + end - start - 1 >= queue_length(&playlist->queue)) ||
(to < 0 && abs(to) > (int)queue_length(&playlist->queue)))
return PLAYLIST_RESULT_BAD_RANGE;
if ((int)start == to)
/* nothing happens */
return PLAYLIST_RESULT_SUCCESS;
queued = playlist_get_queued_song(playlist);
/*
* (to < 0) => move to offset from current song
* (-playlist.length == to) => move to position BEFORE current song
*/
currentSong = playlist->current >= 0
? (int)queue_order_to_position(&playlist->queue,
playlist->current)
: -1;
if (to < 0 && playlist->current >= 0) {
if (start <= (unsigned)currentSong && (unsigned)currentSong <= end)
/* no-op, can't be moved to offset of itself */
return PLAYLIST_RESULT_SUCCESS;
to = (currentSong + abs(to)) % queue_length(&playlist->queue);
if (start < (unsigned)to)
to--;
}
queue_move_range(&playlist->queue, start, end, to);
if (!playlist->queue.random) {
/* update current/queued */
if ((int)start <= playlist->current &&
(unsigned)playlist->current < end)
playlist->current += to - start;
else if (playlist->current >= (int)end &&
playlist->current <= to) {
playlist->current -= end - start;
} else if (playlist->current >= to &&
playlist->current < (int)start) {
playlist->current += end - start;
}
}
playlist_increment_version(playlist);
playlist_update_queued_song(playlist, queued);
return PLAYLIST_RESULT_SUCCESS;
}
enum playlist_result
playlist_delete_range(struct playlist *playlist, unsigned start, unsigned end)
{
const struct song *queued;
if (start >= queue_length(&playlist->queue))
return PLAYLIST_RESULT_BAD_RANGE;
if (end > queue_length(&playlist->queue))
end = queue_length(&playlist->queue);
if (start >= end)
return PLAYLIST_RESULT_SUCCESS;
queued = playlist_get_queued_song(playlist);
do {
playlist_delete_internal(playlist, --end, &queued);
} while (end != start);
playlist_increment_version(playlist);
playlist_update_queued_song(playlist, queued);
return PLAYLIST_RESULT_SUCCESS;
}
enum playlist_result
playlist_delete(struct playlist *playlist, unsigned song)
{
const struct song *queued;
if (song >= queue_length(&playlist->queue))
return PLAYLIST_RESULT_BAD_RANGE;
queued = playlist_get_queued_song(playlist);
playlist_delete_internal(playlist, song, &queued);
playlist_increment_version(playlist);
playlist_update_queued_song(playlist, queued);
return PLAYLIST_RESULT_SUCCESS;
}
void
playlist_shuffle(struct playlist *playlist, struct player_control *pc,
unsigned start, unsigned end)
{
const struct song *queued;
if (end > queue_length(&playlist->queue))
/* correct the "end" offset */
end = queue_length(&playlist->queue);
if ((start+1) >= end)
/* needs at least two entries. */
return;
queued = playlist_get_queued_song(playlist);
if (playlist->playing && playlist->current >= 0) {
unsigned current_position;
current_position = queue_order_to_position(&playlist->queue,
playlist->current);
if (current_position >= start && current_position < end)
{
/* put current playing song first */
queue_swap(&playlist->queue, start, current_position);
if (playlist->queue.random) {
playlist->current =
queue_position_to_order(&playlist->queue, start);
} else
playlist->current = start;
/* start shuffle after the current song */
start++;
}
} else {
/* no playback currently: reset playlist->current */
playlist->current = -1;
}
queue_shuffle_range(&playlist->queue, start, end);
playlist_increment_version(playlist);
playlist_update_queued_song(playlist, pc, queued);
}
void playlist_clear(struct playlist *playlist)
{
playlist_stop(playlist);
/* make sure there are no references to allocated songs
anymore */
for (unsigned i = 0; i < queue_length(&playlist->queue); i++) {
const struct song *song = queue_get(&playlist->queue, i);
if (!song_in_database(song))
pc_song_deleted(song);
}
queue_clear(&playlist->queue);
playlist->current = -1;
playlist_increment_version(playlist);
}
enum playlist_result
playlist_set_priority(struct playlist *playlist, struct player_control *pc,
unsigned start, unsigned end,
uint8_t priority)
{
if (start >= queue_length(&playlist->queue))
return PLAYLIST_RESULT_BAD_RANGE;
if (end > queue_length(&playlist->queue))
end = queue_length(&playlist->queue);
if (start >= end)
return PLAYLIST_RESULT_SUCCESS;
/* remember "current" and "queued" */
int current_position = playlist->current >= 0
? (int)queue_order_to_position(&playlist->queue,
playlist->current)
: -1;
const struct song *queued = playlist_get_queued_song(playlist);
/* apply the priority changes */
queue_set_priority_range(&playlist->queue, start, end, priority,
playlist->current);
playlist_increment_version(playlist);
/* restore "current" and choose a new "queued" */
if (current_position >= 0)
playlist->current = queue_position_to_order(&playlist->queue,
current_position);
playlist_update_queued_song(playlist, pc, queued);
return PLAYLIST_RESULT_SUCCESS;
}
enum playlist_result
playlist_swap_songs(struct playlist *playlist, struct player_control *pc,
unsigned song1, unsigned song2)
{
const struct song *queued;
if (!queue_valid_position(&playlist->queue, song1) ||
!queue_valid_position(&playlist->queue, song2))
return PLAYLIST_RESULT_BAD_RANGE;
queued = playlist_get_queued_song(playlist);
queue_swap(&playlist->queue, song1, song2);
if (playlist->queue.random) {
/* update the queue order, so that playlist->current
still points to the current song order */
queue_swap_order(&playlist->queue,
queue_position_to_order(&playlist->queue,
song1),
queue_position_to_order(&playlist->queue,
song2));
} else {
/* correct the "current" song order */
if (playlist->current == (int)song1)
playlist->current = song2;
else if (playlist->current == (int)song2)
playlist->current = song1;
}
playlist_increment_version(playlist);
playlist_update_queued_song(playlist, pc, queued);
return PLAYLIST_RESULT_SUCCESS;
}
enum playlist_result
playlist_append_song(struct playlist *playlist,
struct song *song, unsigned *added_id)
{
const struct song *queued;
unsigned id;
if (queue_is_full(&playlist->queue))
return PLAYLIST_RESULT_TOO_LARGE;
queued = playlist_get_queued_song(playlist);
id = queue_append(&playlist->queue, song);
if (playlist->queue.random) {
/* shuffle the new song into the list of remaining
songs to play */
unsigned start;
if (playlist->queued >= 0)
start = playlist->queued + 1;
else
start = playlist->current + 1;
if (start < queue_length(&playlist->queue))
queue_shuffle_order_last(&playlist->queue, start,
queue_length(&playlist->queue));
}
playlist_increment_version(playlist);
playlist_update_queued_song(playlist, queued);
if (added_id)
*added_id = id;
return PLAYLIST_RESULT_SUCCESS;
}