static void
playlist_delete_internal(struct playlist *playlist, unsigned song,
const struct song **queued_p)
{
unsigned songOrder;
assert(song < queue_length(&playlist->queue));
songOrder = queue_position_to_order(&playlist->queue, song);
if (playlist->playing && playlist->current == (int)songOrder) {
bool paused = pc_get_state() == PLAYER_STATE_PAUSE;
/* the current song is going to be deleted: stop the player */
pc_stop();
playlist->playing = false;
/* see which song is going to be played instead */
playlist->current = queue_next_order(&playlist->queue,
playlist->current);
if (playlist->current == (int)songOrder)
playlist->current = -1;
if (playlist->current >= 0 && !paused)
/* play the song after the deleted one */
playlist_play_order(playlist, playlist->current);
else
/* no songs left to play, stop playback
completely */
playlist_stop(playlist);
*queued_p = NULL;
} else if (playlist->current == (int)songOrder)
/* there's a "current song" but we're not playing
currently - clear "current" */
playlist->current = -1;
/* now do it: remove the song */
if (!song_in_database(queue_get(&playlist->queue, song)))
pc_song_deleted(queue_get(&playlist->queue, song));
queue_delete(&playlist->queue, song);
/* update the "current" and "queued" variables */
if (playlist->current > (int)songOrder) {
playlist->current--;
}
}
enum playlist_result
playlist_play(struct playlist *playlist, struct player_control *pc,
int song)
{
unsigned i = song;
pc_clear_error(pc);
if (song == -1) {
/* play any song ("current" song, or the first song */
if (queue_is_empty(&playlist->queue))
return PLAYLIST_RESULT_SUCCESS;
if (playlist->playing) {
/* already playing: unpause playback, just in
case it was paused, and return */
pc_set_pause(pc, false);
return PLAYLIST_RESULT_SUCCESS;
}
/* select a song: "current" song, or the first one */
i = playlist->current >= 0
? playlist->current
: 0;
} else if (!queue_valid_position(&playlist->queue, song))
return PLAYLIST_RESULT_BAD_RANGE;
if (playlist->queue.random) {
if (song >= 0)
/* "i" is currently the song position (which
would be equal to the order number in
no-random mode); convert it to a order
number, because random mode is enabled */
i = queue_position_to_order(&playlist->queue, song);
if (!playlist->playing)
playlist->current = 0;
/* swap the new song with the previous "current" one,
so playback continues as planned */
queue_swap_order(&playlist->queue,
i, playlist->current);
i = playlist->current;
}
playlist->stop_on_error = false;
playlist->error_count = 0;
playlist_play_order(playlist, pc, i);
return PLAYLIST_RESULT_SUCCESS;
}
void
playlist_previous(struct playlist *playlist, struct player_control *pc)
{
if (!playlist->playing)
return;
assert(queue_length(&playlist->queue) > 0);
if (playlist->current > 0) {
/* play the preceding song */
playlist_play_order(playlist, pc,
playlist->current - 1);
} else if (playlist->queue.repeat) {
/* play the last song in "repeat" mode */
playlist_play_order(playlist, pc,
queue_length(&playlist->queue) - 1);
} else {
/* re-start playing the current song if it's
the first one */
playlist_play_order(playlist, pc, playlist->current);
}
}
void
playlist_next(struct playlist *playlist, struct player_control *pc)
{
int next_order;
int current;
if (!playlist->playing)
return;
assert(!queue_is_empty(&playlist->queue));
assert(queue_valid_order(&playlist->queue, playlist->current));
current = playlist->current;
playlist->stop_on_error = false;
/* determine the next song from the queue's order list */
next_order = queue_next_order(&playlist->queue, playlist->current);
if (next_order < 0) {
/* no song after this one: stop playback */
playlist_stop(playlist, pc);
/* reset "current song" */
playlist->current = -1;
}
else
{
if (next_order == 0 && playlist->queue.random) {
/* The queue told us that the next song is the first
song. This means we are in repeat mode. Shuffle
the queue order, so this time, the user hears the
songs in a different than before */
assert(playlist->queue.repeat);
queue_shuffle_order(&playlist->queue);
/* note that playlist->current and playlist->queued are
now invalid, but playlist_play_order() will
discard them anyway */
}
playlist_play_order(playlist, pc, next_order);
}
/* Consume mode removes each played songs. */
if(playlist->queue.consume)
playlist_delete(playlist, pc,
queue_order_to_position(&playlist->queue,
current));
}
