void player_play_file(struct track_info *ti)
{
player_lock();
__producer_set_file(ti);
if (producer_status == PS_UNLOADED) {
__consumer_stop();
goto out;
}
/* PS_STOPPED */
__producer_play();
/* PS_UNLOADED,PS_PLAYING */
if (producer_status == PS_UNLOADED) {
__consumer_stop();
goto out;
}
/* PS_PLAYING */
if (consumer_status == CS_STOPPED) {
__consumer_play();
if (consumer_status == CS_STOPPED)
__producer_stop();
} else {
op_drop();
change_sf(1);
}
out:
__player_status_changed();
if (producer_status == PS_PLAYING)
__prebuffer();
player_unlock();
}
static void
player_command(struct player_control *pc, enum player_command cmd)
{
player_lock(pc);
player_command_locked(pc, cmd);
player_unlock(pc);
}
void
pc_set_border_pause(struct player_control *pc, bool border_pause)
{
player_lock(pc);
pc->border_pause = border_pause;
player_unlock(pc);
}
/**
* This is the "PLAYLIST" event handler. It is invoked by the player
* thread whenever it requests a new queued song, or when it exits.
*/
void
playlist_sync(struct playlist *playlist)
{
if (!playlist->playing)
/* this event has reached us out of sync: we aren't
playing anymore; ignore the event */
return;
player_lock();
enum player_state pc_state = pc_get_state();
const struct song *pc_next_song = pc.next_song;
player_unlock();
if (pc_state == PLAYER_STATE_STOP)
/* the player thread has stopped: check if playback
should be restarted with the next song. That can
happen if the playlist isn't filling the queue fast
enough */
playlist_resume_playback(playlist);
else {
/* check if the player thread has already started
playing the queued song */
if (pc_next_song == NULL && playlist->queued != -1)
playlist_song_started(playlist);
/* make sure the queued song is always set (if
possible) */
if (pc.next_song == NULL && playlist->queued < 0)
playlist_update_queued_song(playlist, NULL);
}
}
void
pc_clear_error(void)
{
player_lock();
pc.error = PLAYER_ERROR_NOERROR;
pc.errored_song = NULL;
player_unlock();
}
void player_stop(void)
{
player_lock();
__consumer_stop();
__producer_stop();
__player_status_changed();
player_unlock();
}
/**
* After the decoder has been started asynchronously, wait for the
* "START" command to finish. The decoder may not be initialized yet,
* i.e. there is no audio_format information yet.
*
* The player lock is not held.
*/
static bool
player_wait_for_decoder(struct player *player)
{
struct player_control *pc = player->pc;
struct decoder_control *dc = player->dc;
assert(player->queued || pc->command == PLAYER_COMMAND_SEEK);
assert(pc->next_song != NULL);
player->queued = false;
if (decoder_lock_has_failed(dc)) {
player_lock(pc);
pc->errored_song = dc->song;
pc->error = PLAYER_ERROR_FILE;
pc->next_song = NULL;
player_unlock(pc);
return false;
}
player->song = pc->next_song;
player->elapsed_time = 0.0;
/* set the "starting" flag, which will be cleared by
player_check_decoder_startup() */
player->decoder_starting = true;
player_lock(pc);
/* update player_control's song information */
pc->total_time = song_get_duration(pc->next_song);
pc->bit_rate = 0;
audio_format_clear(&pc->audio_format);
/* clear the queued song */
pc->next_song = NULL;
player_unlock(pc);
/* call syncPlaylistWithQueue() in the main thread */
event_pipe_emit(PIPE_EVENT_PLAYLIST);
return true;
}
void
pc_enqueue_song(struct player_control *pc, struct song *song)
{
assert(song != NULL);
player_lock(pc);
pc_enqueue_song_locked(pc, song);
player_unlock(pc);
}
void
pc_enqueue_song(struct song *song)
{
assert(song != NULL);
player_lock();
pc_enqueue_song_locked(song);
player_unlock();
}
void player_init(const struct player_callbacks *callbacks)
{
int rc;
#ifdef REALTIME_SCHEDULING
pthread_attr_t attr;
#endif
pthread_attr_t *attrp = NULL;
/* This mutex is locked inside of the mpris implementation which is
* called into from many different places. It is not trivial to see if
* those places do already hold this lock and so the mpris functions
* always acquires it. To avoid deadlocks in the places where the lock
* is already held by the calling context, we use a recursive mutex.
*/
cmus_mutex_init_recursive(&player_info.mutex);
/* 1 s is 176400 B (0.168 MB)
* 10 s is 1.68 MB
*/
buffer_nr_chunks = 10 * 44100 * 16 / 8 * 2 / CHUNK_SIZE;
buffer_init();
player_cbs = callbacks;
#ifdef REALTIME_SCHEDULING
rc = pthread_attr_init(&attr);
BUG_ON(rc);
rc = pthread_attr_setschedpolicy(&attr, SCHED_RR);
if (rc) {
d_print("could not set real-time scheduling priority: %s\n", strerror(rc));
} else {
struct sched_param param;
d_print("using real-time scheduling\n");
param.sched_priority = sched_get_priority_max(SCHED_RR);
d_print("setting priority to %d\n", param.sched_priority);
rc = pthread_attr_setschedparam(&attr, ¶m);
BUG_ON(rc);
attrp = &attr;
}
#endif
rc = pthread_create(&producer_thread, NULL, producer_loop, NULL);
BUG_ON(rc);
rc = pthread_create(&consumer_thread, attrp, consumer_loop, NULL);
if (rc && attrp) {
d_print("could not create thread using real-time scheduling: %s\n", strerror(rc));
rc = pthread_create(&consumer_thread, NULL, consumer_loop, NULL);
}
BUG_ON(rc);
/* update player_info.cont etc. */
player_lock();
_player_status_changed();
player_unlock();
}
char *
pc_get_error_message(struct player_control *pc)
{
player_lock(pc);
char *message = pc->error_type != PLAYER_ERROR_NONE
? g_strdup(pc->error->message)
: NULL;
player_unlock(pc);
return message;
}
void player_set_rg_preamp(double db)
{
player_lock();
replaygain_preamp = db;
player_info_lock();
update_rg_scale();
player_info_unlock();
player_unlock();
}
void player_set_rg_limit(int limit)
{
player_lock();
replaygain_limit = limit;
player_info_lock();
update_rg_scale();
player_info_unlock();
player_unlock();
}
void player_set_buffer_chunks(unsigned int nr_chunks)
{
player_lock();
__producer_stop();
__consumer_stop();
buffer_nr_chunks = nr_chunks;
buffer_init();
__player_status_changed();
player_unlock();
}
void
pc_clear_error(struct player_control *pc)
{
player_lock(pc);
if (pc->error_type != PLAYER_ERROR_NONE) {
pc->error_type = PLAYER_ERROR_NONE;
g_error_free(pc->error);
}
player_unlock(pc);
}
void
pc_enqueue_song(struct song *song)
{
assert(song != NULL);
player_lock();
assert(pc.next_song == NULL);
pc.next_song = song;
player_command_locked(PLAYER_COMMAND_QUEUE);
player_unlock();
}
void
pc_pause(struct player_control *pc)
{
player_lock(pc);
if (pc->state != PLAYER_STATE_STOP) {
player_command_locked(pc, PLAYER_COMMAND_PAUSE);
idle_add(IDLE_PLAYER);
}
player_unlock(pc);
}
void
pc_pause(void)
{
player_lock();
if (pc.state != PLAYER_STATE_STOP) {
player_command_locked(PLAYER_COMMAND_PAUSE);
idle_add(IDLE_PLAYER);
}
player_unlock();
}
void player_set_rg(enum replaygain rg)
{
player_lock();
/* don't mess with scale_pos if soft_vol or replaygain is already enabled */
if (!soft_vol && !replaygain)
scale_pos = consumer_pos;
replaygain = rg;
player_info_lock();
update_rg_scale();
player_info_unlock();
player_unlock();
}
/**
* Wrapper for audio_output_all_open(). Upon failure, it pauses the
* player.
*
* @return true on success
*/
static bool
player_open_output(struct player *player)
{
struct player_control *pc = player->pc;
assert(audio_format_defined(&player->play_audio_format));
assert(pc->state == PLAYER_STATE_PLAY ||
pc->state == PLAYER_STATE_PAUSE);
GError *error = NULL;
if (audio_output_all_open(&player->play_audio_format, player_buffer,
&error)) {
player->output_open = true;
player->paused = false;
player_lock(pc);
pc->state = PLAYER_STATE_PLAY;
player_unlock(pc);
return true;
} else {
g_warning("%s", error->message);
player->output_open = false;
/* pause: the user may resume playback as soon as an
audio output becomes available */
player->paused = true;
player_lock(pc);
pc_set_error(pc, PLAYER_ERROR_OUTPUT, error);
pc->state = PLAYER_STATE_PAUSE;
player_unlock(pc);
return false;
}
}
void player_init(const struct player_callbacks *callbacks)
{
int rc;
#ifdef REALTIME_SCHEDULING
pthread_attr_t attr;
#endif
pthread_attr_t *attrp = NULL;
/* 1 s is 176400 B (0.168 MB)
* 10 s is 1.68 MB
*/
buffer_nr_chunks = 10 * 44100 * 16 / 8 * 2 / CHUNK_SIZE;
buffer_init();
player_cbs = callbacks;
#ifdef REALTIME_SCHEDULING
rc = pthread_attr_init(&attr);
BUG_ON(rc);
rc = pthread_attr_setschedpolicy(&attr, SCHED_RR);
if (rc) {
d_print("could not set real-time scheduling priority: %s\n", strerror(rc));
} else {
struct sched_param param;
d_print("using real-time scheduling\n");
param.sched_priority = sched_get_priority_max(SCHED_RR);
d_print("setting priority to %d\n", param.sched_priority);
rc = pthread_attr_setschedparam(&attr, ¶m);
BUG_ON(rc);
attrp = &attr;
}
#endif
rc = pthread_create(&producer_thread, NULL, producer_loop, NULL);
BUG_ON(rc);
rc = pthread_create(&consumer_thread, attrp, consumer_loop, NULL);
if (rc && attrp) {
d_print("could not create thread using real-time scheduling: %s\n", strerror(rc));
rc = pthread_create(&consumer_thread, NULL, consumer_loop, NULL);
}
BUG_ON(rc);
/* update player_info.cont etc. */
player_lock();
__player_status_changed();
player_unlock();
}
void player_play(void)
{
int prebuffer;
player_lock();
if (producer_status == PS_PLAYING && ip_is_remote(ip)) {
/* seeking not allowed */
player_unlock();
return;
}
prebuffer = consumer_status == CS_STOPPED;
__producer_play();
if (producer_status == PS_PLAYING) {
__consumer_play();
if (consumer_status != CS_PLAYING)
__producer_stop();
} else {
__consumer_stop();
}
__player_status_changed();
if (consumer_status == CS_PLAYING && prebuffer)
__prebuffer();
player_unlock();
}
void player_exit(void)
{
int rc;
player_lock();
consumer_running = 0;
pthread_cond_broadcast(&consumer_playing);
producer_running = 0;
pthread_cond_broadcast(&producer_playing);
player_unlock();
rc = pthread_join(consumer_thread, NULL);
BUG_ON(rc);
rc = pthread_join(producer_thread, NULL);
BUG_ON(rc);
buffer_free();
}
void
pc_get_status(struct player_status *status)
{
player_lock();
player_command_locked(PLAYER_COMMAND_REFRESH);
status->state = pc.state;
if (pc.state != PLAYER_STATE_STOP) {
status->bit_rate = pc.bit_rate;
status->audio_format = pc.audio_format;
status->total_time = pc.total_time;
status->elapsed_time = pc.elapsed_time;
}
player_unlock();
}
bool
pc_seek(struct song *song, float seek_time)
{
assert(song != NULL);
player_lock();
pc.next_song = song;
pc.seek_where = seek_time;
player_command_locked(PLAYER_COMMAND_SEEK);
player_unlock();
assert(pc.next_song == NULL);
idle_add(IDLE_PLAYER);
return true;
}
void
pc_play(struct song *song)
{
assert(song != NULL);
player_lock();
if (pc.state != PLAYER_STATE_STOP)
player_command_locked(PLAYER_COMMAND_STOP);
assert(pc.next_song == NULL);
pc_enqueue_song_locked(song);
assert(pc.next_song == NULL);
player_unlock();
idle_add(IDLE_PLAYER);
}
bool
pc_seek(struct player_control *pc, struct song *song, float seek_time)
{
assert(song != NULL);
player_lock(pc);
if (pc->next_song != NULL)
song_free(pc->next_song);
pc->next_song = song;
pc->seek_where = seek_time;
player_command_locked(pc, PLAYER_COMMAND_SEEK);
player_unlock(pc);
assert(pc->next_song == NULL);
idle_add(IDLE_PLAYER);
return true;
}
void
pc_set_pause(struct player_control *pc, bool pause_flag)
{
player_lock(pc);
switch (pc->state) {
case PLAYER_STATE_STOP:
break;
case PLAYER_STATE_PLAY:
if (pause_flag)
pc_pause_locked(pc);
break;
case PLAYER_STATE_PAUSE:
if (!pause_flag)
pc_pause_locked(pc);
break;
}
player_unlock(pc);
}
void
pc_set_pause(bool pause_flag)
{
player_lock();
switch (pc.state) {
case PLAYER_STATE_STOP:
break;
case PLAYER_STATE_PLAY:
if (pause_flag)
pc_pause_locked();
break;
case PLAYER_STATE_PAUSE:
if (!pause_flag)
pc_pause_locked();
break;
}
player_unlock();
}
/*
* The main loop of the player thread, during playback. This is
* basically a state machine, which multiplexes data between the
* decoder thread and the output threads.
*/
static void do_play(struct player_control *pc, struct decoder_control *dc)
{
struct player player = {
.pc = pc,
.dc = dc,
.buffering = true,
.decoder_starting = false,
.paused = false,
.queued = true,
.song = NULL,
.xfade = XFADE_UNKNOWN,
.cross_fading = false,
.cross_fade_chunks = 0,
.cross_fade_tag = NULL,
.elapsed_time = 0.0,
};
player_unlock(pc);
player.pipe = music_pipe_new();
player_dc_start(&player, player.pipe);
if (!player_wait_for_decoder(&player)) {
player_dc_stop(&player);
player_command_finished(pc);
music_pipe_free(player.pipe);
event_pipe_emit(PIPE_EVENT_PLAYLIST);
player_lock(pc);
return;
}
player_lock(pc);
pc->state = PLAYER_STATE_PLAY;
player_command_finished_locked(pc);
while (true) {
player_process_command(&player);
if (pc->command == PLAYER_COMMAND_STOP ||
pc->command == PLAYER_COMMAND_EXIT ||
pc->command == PLAYER_COMMAND_CLOSE_AUDIO) {
player_unlock(pc);
audio_output_all_cancel();
break;
}
player_unlock(pc);
if (player.buffering) {
/* buffering at the start of the song - wait
until the buffer is large enough, to
prevent stuttering on slow machines */
if (music_pipe_size(player.pipe) < pc->buffered_before_play &&
!decoder_lock_is_idle(dc)) {
/* not enough decoded buffer space yet */
if (!player.paused &&
audio_format_defined(&player.play_audio_format) &&
audio_output_all_check() < 4 &&
!player_send_silence(&player))
break;
decoder_lock(dc);
/* XXX race condition: check decoder again */
player_wait_decoder(pc, dc);
decoder_unlock(dc);
player_lock(pc);
continue;
} else {
/* buffering is complete */
player.buffering = false;
}
}
if (player.decoder_starting) {
/* wait until the decoder is initialized completely */
if (!player_check_decoder_startup(&player))
break;
player_lock(pc);
continue;
}
#ifndef NDEBUG
/*
music_pipe_check_format(&play_audio_format,
player.next_song_chunk,
&dc->out_audio_format);
*/
#endif
if (decoder_lock_is_idle(dc) && player.queued &&
dc->pipe == player.pipe) {
/* the decoder has finished the current song;
make it decode the next song */
assert(dc->pipe == NULL || dc->pipe == player.pipe);
player_dc_start(&player, music_pipe_new());
}
if (player_dc_at_next_song(&player) &&
player.xfade == XFADE_UNKNOWN &&
!decoder_lock_is_starting(dc)) {
/* enable cross fading in this song? if yes,
calculate how many chunks will be required
for it */
player.cross_fade_chunks =
cross_fade_calc(pc->cross_fade_seconds, dc->total_time,
pc->mixramp_db,
pc->mixramp_delay_seconds,
dc->replay_gain_db,
dc->replay_gain_prev_db,
dc->mixramp_start,
dc->mixramp_prev_end,
&dc->out_audio_format,
&player.play_audio_format,
music_buffer_size(player_buffer) -
pc->buffered_before_play);
if (player.cross_fade_chunks > 0) {
player.xfade = XFADE_ENABLED;
player.cross_fading = false;
} else
/* cross fading is disabled or the
next song is too short */
player.xfade = XFADE_DISABLED;
}
if (player.paused) {
player_lock(pc);
if (pc->command == PLAYER_COMMAND_NONE)
player_wait(pc);
continue;
} else if (!music_pipe_empty(player.pipe)) {
/* at least one music chunk is ready - send it
to the audio output */
play_next_chunk(&player);
} else if (audio_output_all_check() > 0) {
/* not enough data from decoder, but the
output thread is still busy, so it's
okay */
/* XXX synchronize in a better way */
g_usleep(10000);
} else if (player_dc_at_next_song(&player)) {
/* at the beginning of a new song */
if (!player_song_border(&player))
break;
} else if (decoder_lock_is_idle(dc)) {
/* check the size of the pipe again, because
the decoder thread may have added something
since we last checked */
if (music_pipe_empty(player.pipe)) {
/* wait for the hardware to finish
playback */
audio_output_all_drain();
break;
}
} else {
/* the decoder is too busy and hasn't provided
new PCM data in time: send silence (if the
output pipe is empty) */
if (!player_send_silence(&player))
break;
}
player_lock(pc);
}
player_dc_stop(&player);
music_pipe_clear(player.pipe, player_buffer);
music_pipe_free(player.pipe);
if (player.cross_fade_tag != NULL)
tag_free(player.cross_fade_tag);
player_lock(pc);
if (player.queued) {
assert(pc->next_song != NULL);
pc->next_song = NULL;
}
pc->state = PLAYER_STATE_STOP;
player_unlock(pc);
event_pipe_emit(PIPE_EVENT_PLAYLIST);
player_lock(pc);
}
static gpointer
player_task(gpointer arg)
{
struct player_control *pc = arg;
struct decoder_control *dc = dc_new(pc->cond);
decoder_thread_start(dc);
player_buffer = music_buffer_new(pc->buffer_chunks);
player_lock(pc);
while (1) {
switch (pc->command) {
case PLAYER_COMMAND_QUEUE:
assert(pc->next_song != NULL);
do_play(pc, dc);
break;
case PLAYER_COMMAND_STOP:
player_unlock(pc);
audio_output_all_cancel();
player_lock(pc);
/* fall through */
case PLAYER_COMMAND_SEEK:
case PLAYER_COMMAND_PAUSE:
pc->next_song = NULL;
player_command_finished_locked(pc);
break;
case PLAYER_COMMAND_CLOSE_AUDIO:
player_unlock(pc);
audio_output_all_release();
player_lock(pc);
player_command_finished_locked(pc);
#ifndef NDEBUG
/* in the DEBUG build, check for leaked
music_chunk objects by freeing the
music_buffer */
music_buffer_free(player_buffer);
player_buffer = music_buffer_new(pc->buffer_chunks);
#endif
break;
case PLAYER_COMMAND_UPDATE_AUDIO:
player_unlock(pc);
audio_output_all_enable_disable();
player_lock(pc);
player_command_finished_locked(pc);
break;
case PLAYER_COMMAND_EXIT:
player_unlock(pc);
dc_quit(dc);
dc_free(dc);
audio_output_all_close();
music_buffer_free(player_buffer);
player_command_finished(pc);
return NULL;
case PLAYER_COMMAND_CANCEL:
pc->next_song = NULL;
player_command_finished_locked(pc);
break;
case PLAYER_COMMAND_REFRESH:
/* no-op when not playing */
player_command_finished_locked(pc);
break;
case PLAYER_COMMAND_NONE:
player_wait(pc);
break;
}
}
}
void
player_create(struct player_control *pc)
{
assert(pc->thread == NULL);
GError *e = NULL;
pc->thread = g_thread_create(player_task, pc, true, &e);
if (pc->thread == NULL)
MPD_ERROR("Failed to spawn player task: %s", e->message);
}