1 files changed, 214 insertions, 92 deletions

diff --git a/src/player_thread.c b/src/player_thread.c
index 7fc55d3d1..3e822e280 100644
--- a/src/player_thread.c
+++ b/src/player_thread.c
@@ -95,29 +95,41 @@ struct player {
 	struct audio_format play_audio_format;
 
 	/**
-	 * Coefficient for converting a PCM buffer size into a time
-	 * span.
+	 * The time stamp of the chunk most recently sent to the
+	 * output thread.  This attribute is only used if
+	 * audio_output_all_get_elapsed_time() didn't return a usable
+	 * value; the output thread can estimate the elapsed time more
+	 * precisly.
 	 */
-	double size_to_time;
+	float elapsed_time;
 };
 
 static struct music_buffer *player_buffer;
 
-static void player_command_finished(void)
+static void player_command_finished_locked(void)
 {
 	assert(pc.command != PLAYER_COMMAND_NONE);
 
 	pc.command = PLAYER_COMMAND_NONE;
-	notify_signal(&main_notify);
+	g_cond_signal(main_cond);
+}
+
+static void player_command_finished(void)
+{
+	player_lock();
+	player_command_finished_locked();
+	player_unlock();
 }
 
 /**
  * Stop the decoder and clears (and frees) its music pipe.
+ *
+ * Player lock is not held.
  */
 static void
 player_dc_stop(struct player *player)
 {
-	dc_stop(&pc.notify);
+	dc_stop();
 
 	if (dc.pipe != NULL) {
 		/* clear and free the decoder pipe */
@@ -135,17 +147,23 @@ player_dc_stop(struct player *player)
  * 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)
 {
-	dc_command_wait(&pc.notify);
+	dc_command_wait();
 
-	if (decoder_has_failed()) {
-		assert(dc.next_song == NULL || dc.next_song->url != NULL);
+	if (decoder_lock_has_failed()) {
+		assert(dc.next_song == NULL || dc.next_song->uri != NULL);
+
+		player_lock();
 		pc.errored_song = dc.next_song;
 		pc.error = PLAYER_ERROR_FILE;
 		pc.next_song = NULL;
+		player_unlock();
+
 		player->queued = false;
 		return false;
 	}
@@ -157,8 +175,8 @@ player_wait_for_decoder(struct player *player)
 
 	player->song = pc.next_song;
 	pc.next_song = NULL;
-	pc.elapsed_time = 0;
 	player->queued = false;
+	player->elapsed_time = 0.0;
 
 	/* set the "starting" flag, which will be cleared by
 	   player_check_decoder_startup() */
@@ -174,15 +192,21 @@ player_wait_for_decoder(struct player *player)
  * The decoder has acknowledged the "START" command (see
  * player_wait_for_decoder()).  This function checks if the decoder
  * initialization has completed yet.
+ *
+ * The player lock is not held.
  */
 static bool
 player_check_decoder_startup(struct player *player)
 {
 	assert(player->decoder_starting);
 
+	decoder_lock();
+
 	if (decoder_has_failed()) {
 		/* the decoder failed */
-		assert(dc.next_song == NULL || dc.next_song->url != NULL);
+		assert(dc.next_song == NULL || dc.next_song->uri != NULL);
+
+		decoder_unlock();
 
 		pc.errored_song = dc.next_song;
 		pc.error = PLAYER_ERROR_FILE;
@@ -191,6 +215,8 @@ player_check_decoder_startup(struct player *player)
 	} else if (!decoder_is_starting()) {
 		/* the decoder is ready and ok */
 
+		decoder_unlock();
+
 		if (audio_format_defined(&player->play_audio_format) &&
 		    !audio_output_all_wait(1))
 			/* the output devices havn't finished playing
@@ -200,8 +226,6 @@ player_check_decoder_startup(struct player *player)
 		pc.total_time = dc.total_time;
 		pc.audio_format = dc.in_audio_format;
 		player->play_audio_format = dc.out_audio_format;
-		player->size_to_time =
-			audioFormatSizeToTime(&dc.out_audio_format);
 		player->decoder_starting = false;
 
 		if (!player->paused &&
@@ -212,7 +236,7 @@ player_check_decoder_startup(struct player *player)
 				  "while playing \"%s\"", uri);
 			g_free(uri);
 
-			assert(dc.next_song == NULL || dc.next_song->url != NULL);
+			assert(dc.next_song == NULL || dc.next_song->uri != NULL);
 			pc.errored_song = dc.next_song;
 			pc.error = PLAYER_ERROR_AUDIO;
 
@@ -227,7 +251,8 @@ player_check_decoder_startup(struct player *player)
 	} else {
 		/* the decoder is not yet ready; wait
 		   some more */
-		notify_wait(&pc.notify);
+		player_wait_decoder();
+		decoder_unlock();
 
 		return true;
 	}
@@ -237,6 +262,8 @@ player_check_decoder_startup(struct player *player)
  * Sends a chunk of silence to the audio outputs.  This is called when
  * there is not enough decoded data in the pipe yet, to prevent
  * underruns in the hardware buffers.
+ *
+ * The player lock is not held.
  */
 static bool
 player_send_silence(struct player *player)
@@ -273,6 +300,8 @@ player_send_silence(struct player *player)
 
 /**
  * This is the handler for the #PLAYER_COMMAND_SEEK command.
+ *
+ * The player lock is not held.
  */
 static bool player_seek_decoder(struct player *player)
 {
@@ -324,14 +353,15 @@ static bool player_seek_decoder(struct player *player)
 	if (where < 0.0)
 		where = 0.0;
 
-	ret = dc_seek(&pc.notify, where);
+	ret = dc_seek(where);
 	if (!ret) {
 		/* decoder failure */
 		player_command_finished();
 		return false;
 	}
 
-	pc.elapsed_time = where;
+	player->elapsed_time = where;
+
 	player_command_finished();
 
 	player->xfade = XFADE_UNKNOWN;
@@ -344,53 +374,73 @@ static bool player_seek_decoder(struct player *player)
 	return true;
 }
 
+/**
+ * Player lock must be held before calling.
+ */
 static void player_process_command(struct player *player)
 {
 	switch (pc.command) {
 	case PLAYER_COMMAND_NONE:
-	case PLAYER_COMMAND_PLAY:
 	case PLAYER_COMMAND_STOP:
 	case PLAYER_COMMAND_EXIT:
 	case PLAYER_COMMAND_CLOSE_AUDIO:
 		break;
 
+	case PLAYER_COMMAND_UPDATE_AUDIO:
+		player_unlock();
+		audio_output_all_enable_disable();
+		player_lock();
+		player_command_finished_locked();
+		break;
+
 	case PLAYER_COMMAND_QUEUE:
 		assert(pc.next_song != NULL);
 		assert(!player->queued);
 		assert(dc.pipe == NULL || dc.pipe == player->pipe);
 
 		player->queued = true;
-		player_command_finished();
+		player_command_finished_locked();
 		break;
 
 	case PLAYER_COMMAND_PAUSE:
+		player_unlock();
+
 		player->paused = !player->paused;
 		if (player->paused) {
 			audio_output_all_pause();
+			player_lock();
+
 			pc.state = PLAYER_STATE_PAUSE;
 		} else if (!audio_format_defined(&player->play_audio_format)) {
 			/* the decoder hasn't provided an audio format
 			   yet - don't open the audio device yet */
+			player_lock();
 
 			pc.state = PLAYER_STATE_PLAY;
 		} else if (audio_output_all_open(&player->play_audio_format, player_buffer)) {
 			/* unpaused, continue playing */
+			player_lock();
+
 			pc.state = PLAYER_STATE_PLAY;
 		} else {
 			/* the audio device has failed - rollback to
 			   pause mode */
-			assert(dc.next_song == NULL || dc.next_song->url != NULL);
+			assert(dc.next_song == NULL || dc.next_song->uri != NULL);
 			pc.errored_song = dc.next_song;
 			pc.error = PLAYER_ERROR_AUDIO;
 
 			player->paused = true;
+
+			player_lock();
 		}
 
-		player_command_finished();
+		player_command_finished_locked();
 		break;
 
 	case PLAYER_COMMAND_SEEK:
+		player_unlock();
 		player_seek_decoder(player);
+		player_lock();
 		break;
 
 	case PLAYER_COMMAND_CANCEL:
@@ -402,80 +452,91 @@ static void player_process_command(struct player *player)
 			return;
 		}
 
-		if (dc.pipe != NULL && dc.pipe != player->pipe)
+		if (dc.pipe != NULL && dc.pipe != player->pipe) {
 			/* the decoder is already decoding the song -
 			   stop it and reset the position */
+			player_unlock();
 			player_dc_stop(player);
+			player_lock();
+		}
 
 		pc.next_song = NULL;
 		player->queued = false;
-		player_command_finished();
+		player_command_finished_locked();
+		break;
+
+	case PLAYER_COMMAND_REFRESH:
+		if (audio_format_defined(&player->play_audio_format) &&
+		    !player->paused) {
+			player_unlock();
+			audio_output_all_check();
+			player_lock();
+		}
+
+		pc.elapsed_time = audio_output_all_get_elapsed_time();
+		if (pc.elapsed_time < 0.0)
+			pc.elapsed_time = player->elapsed_time;
+
+		player_command_finished_locked();
 		break;
 	}
 }
 
+static void
+update_song_tag(struct song *song, const struct tag *new_tag)
+{
+	struct tag *old_tag;
+
+	if (song_is_file(song))
+		/* don't update tags of local files, only remote
+		   streams may change tags dynamically */
+		return;
+
+	old_tag = song->tag;
+	song->tag = tag_dup(new_tag);
+
+	if (old_tag != NULL)
+		tag_free(old_tag);
+
+	/* the main thread will update the playlist version when he
+	   receives this event */
+	event_pipe_emit(PIPE_EVENT_TAG);
+
+	/* notify all clients that the tag of the current song has
+	   changed */
+	idle_add(IDLE_PLAYER);
+}
+
 /**
  * Plays a #music_chunk object (after applying software volume).  If
  * it contains a (stream) tag, copy it to the current song, so MPD's
  * playlist reflects the new stream tag.
+ *
+ * Player lock is not held.
  */
 static bool
 play_chunk(struct song *song, struct music_chunk *chunk,
-	   const struct audio_format *format, double sizeToTime)
+	   const struct audio_format *format)
 {
-	bool success;
-
 	assert(music_chunk_check_format(chunk, format));
 
-	if (chunk->tag != NULL) {
-		if (!song_is_file(song)) {
-			/* always update the tag of remote streams */
-			struct tag *old_tag = song->tag;
-
-			song->tag = tag_dup(chunk->tag);
-
-			if (old_tag != NULL)
-				tag_free(old_tag);
-
-			/* the main thread will update the playlist
-			   version when he receives this event */
-			event_pipe_emit(PIPE_EVENT_TAG);
-
-			/* notify all clients that the tag of the
-			   current song has changed */
-			idle_add(IDLE_PLAYER);
-		}
-	}
+	if (chunk->tag != NULL)
+		update_song_tag(song, chunk->tag);
 
 	if (chunk->length == 0) {
 		music_buffer_return(player_buffer, chunk);
 		return true;
 	}
 
-	pc.elapsed_time = chunk->times;
 	pc.bit_rate = chunk->bit_rate;
 
-	/* apply software volume */
-
-	success = pcm_volume(chunk->data, chunk->length,
-			     format, pc.software_volume);
-	if (!success) {
-		g_warning("pcm_volume() failed on %u:%u:%u",
-			  format->sample_rate, format->bits, format->channels);
-		pc.errored_song = dc.current_song;
-		pc.error = PLAYER_ERROR_AUDIO;
-		return false;
-	}
-
 	/* send the chunk to the audio outputs */
 
-	if (!audio_output_all_play(chunk)) {
-		pc.errored_song = dc.current_song;
-		pc.error = PLAYER_ERROR_AUDIO;
+	if (!audio_output_all_play(chunk))
 		return false;
-	}
 
-	pc.total_play_time += sizeToTime * chunk->length;
+	pc.total_play_time += (double)chunk->length /
+		audio_format_time_to_size(format);
 	return true;
 }
 
@@ -525,14 +586,20 @@ play_next_chunk(struct player *player)
 			music_buffer_return(player_buffer, other_chunk);
 		} else {
 			/* there are not enough decoded chunks yet */
+
+			decoder_lock();
+
 			if (decoder_is_idle()) {
 				/* the decoder isn't running, abort
 				   cross fading */
+				decoder_unlock();
+
 				player->xfade = XFADE_DISABLED;
 			} else {
 				/* wait for the decoder */
-				notify_signal(&dc.notify);
-				notify_wait(&pc.notify);
+				decoder_signal();
+				player_wait_decoder();
+				decoder_unlock();
 
 				return true;
 			}
@@ -546,27 +613,34 @@ play_next_chunk(struct player *player)
 
 	/* play the current chunk */
 
-	success = play_chunk(player->song, chunk, &player->play_audio_format,
-			     player->size_to_time);
+	success = play_chunk(player->song, chunk, &player->play_audio_format);
 
 	if (!success) {
 		music_buffer_return(player_buffer, chunk);
 
+		player_lock();
+
+		pc.error = PLAYER_ERROR_AUDIO;
+
 		/* pause: the user may resume playback as soon as an
 		   audio output becomes available */
 		pc.state = PLAYER_STATE_PAUSE;
 		player->paused = true;
 
+		player_unlock();
+
 		return false;
 	}
 
 	/* this formula should prevent that the decoder gets woken up
 	   with each chunk; it is more efficient to make it decode a
 	   larger block at a time */
+	decoder_lock();
 	if (!decoder_is_idle() &&
 	    music_pipe_size(dc.pipe) <= (pc.buffered_before_play +
 					 music_buffer_size(player_buffer) * 3) / 4)
-		notify_signal(&dc.notify);
+		decoder_signal();
+	decoder_unlock();
 
 	return true;
 }
@@ -576,13 +650,21 @@ play_next_chunk(struct player *player)
  * has consumed all chunks of the current song, and we should start
  * sending chunks from the next one.
  *
+ * The player lock is not held.
+ *
  * @return true on success, false on error (playback will be stopped)
  */
 static bool
 player_song_border(struct player *player)
 {
+	char *uri;
+
 	player->xfade = XFADE_UNKNOWN;
 
+	uri = song_get_uri(player->song);
+	g_message("played \"%s\"", uri);
+	g_free(uri);
+
 	music_pipe_free(player->pipe);
 	player->pipe = dc.pipe;
 
@@ -608,42 +690,48 @@ static void do_play(void)
 		.xfade = XFADE_UNKNOWN,
 		.cross_fading = false,
 		.cross_fade_chunks = 0,
-		.size_to_time = 0.0,
+		.elapsed_time = 0.0,
 	};
 
+	player_unlock();
+
 	player.pipe = music_pipe_new();
 
 	dc.buffer = player_buffer;
 	dc.pipe = player.pipe;
-	dc_start(&pc.notify, pc.next_song);
+	dc_start(pc.next_song);
 	if (!player_wait_for_decoder(&player)) {
 		player_dc_stop(&player);
 		player_command_finished();
 		music_pipe_free(player.pipe);
 		event_pipe_emit(PIPE_EVENT_PLAYLIST);
+		player_lock();
 		return;
 	}
 
-	pc.elapsed_time = 0;
+	player_lock();
 	pc.state = PLAYER_STATE_PLAY;
-	player_command_finished();
+	player_command_finished_locked();
 
 	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();
 			audio_output_all_cancel();
 			break;
 		}
 
+		player_unlock();
+
 		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_is_idle()) {
+			    !decoder_lock_is_idle()) {
 				/* not enough decoded buffer space yet */
 
 				if (!player.paused &&
@@ -652,7 +740,11 @@ static void do_play(void)
 				    !player_send_silence(&player))
 					break;
 
-				notify_wait(&pc.notify);
+				decoder_lock();
+				/* XXX race condition: check decoder again */
+				player_wait_decoder();
+				decoder_unlock();
+				player_lock();
 				continue;
 			} else {
 				/* buffering is complete */
@@ -667,6 +759,8 @@ static void do_play(void)
 			success = player_check_decoder_startup(&player);
 			if (!success)
 				break;
+
+			player_lock();
 			continue;
 		}
 
@@ -678,7 +772,7 @@ static void do_play(void)
 		*/
 #endif
 
-		if (decoder_is_idle() && player.queued) {
+		if (decoder_lock_is_idle() && player.queued) {
 			/* the decoder has finished the current song;
 			   make it decode the next song */
 			assert(pc.next_song != NULL);
@@ -691,7 +785,7 @@ static void do_play(void)
 
 		if (dc.pipe != NULL && dc.pipe != player.pipe &&
 		    player.xfade == XFADE_UNKNOWN &&
-		    !decoder_is_starting()) {
+		    !decoder_lock_is_starting()) {
 			/* enable cross fading in this song?  if yes,
 			   calculate how many chunks will be required
 			   for it */
@@ -710,9 +804,11 @@ static void do_play(void)
 				player.xfade = XFADE_DISABLED;
 		}
 
-		if (player.paused)
-			notify_wait(&pc.notify);
-		else if (music_pipe_size(player.pipe) > 0) {
+		if (player.paused) {
+			player_lock();
+			player_wait();
+			continue;
+		} else if (music_pipe_size(player.pipe) > 0) {
 			/* at least one music chunk is ready - send it
 			   to the audio output */
 
@@ -729,7 +825,7 @@ static void do_play(void)
 
 			if (!player_song_border(&player))
 				break;
-		} else if (decoder_is_idle()) {
+		} else if (decoder_lock_is_idle()) {
 			/* check the size of the pipe again, because
 			   the decoder thread may have added something
 			   since we last checked */
@@ -742,20 +838,25 @@ static void do_play(void)
 			if (!player_send_silence(&player))
 				break;
 		}
-	}
 
-	if (player.queued) {
-		assert(pc.next_song != NULL);
-		pc.next_song = NULL;
+		player_lock();
 	}
 
 	player_dc_stop(&player);
 
+	assert(!player.queued || pc.next_song != NULL);
+	pc.next_song = NULL;
+
 	music_pipe_clear(player.pipe, player_buffer);
 	music_pipe_free(player.pipe);
 
+	player_lock();
 	pc.state = PLAYER_STATE_STOP;
+	player_unlock();
+
 	event_pipe_emit(PIPE_EVENT_PLAYLIST);
+
+	player_lock();
 }
 
 static gpointer player_task(G_GNUC_UNUSED gpointer arg)
@@ -764,9 +865,10 @@ static gpointer player_task(G_GNUC_UNUSED gpointer arg)
 
 	player_buffer = music_buffer_new(pc.buffer_chunks);
 
+	player_lock();
+
 	while (1) {
 		switch (pc.command) {
-		case PLAYER_COMMAND_PLAY:
 		case PLAYER_COMMAND_QUEUE:
 			assert(pc.next_song != NULL);
 
@@ -774,18 +876,25 @@ static gpointer player_task(G_GNUC_UNUSED gpointer arg)
 			break;
 
 		case PLAYER_COMMAND_STOP:
+			player_unlock();
 			audio_output_all_cancel();
+			player_lock();
+
 			/* fall through */
 
 		case PLAYER_COMMAND_SEEK:
 		case PLAYER_COMMAND_PAUSE:
 			pc.next_song = NULL;
-			player_command_finished();
+			player_command_finished_locked();
 			break;
 
 		case PLAYER_COMMAND_CLOSE_AUDIO:
+			player_unlock();
+
 			audio_output_all_close();
-			player_command_finished();
+
+			player_lock();
+			player_command_finished_locked();
 
 #ifndef NDEBUG
 			/* in the DEBUG build, check for leaked
@@ -797,25 +906,38 @@ static gpointer player_task(G_GNUC_UNUSED gpointer arg)
 
 			break;
 
+		case PLAYER_COMMAND_UPDATE_AUDIO:
+			player_unlock();
+			audio_output_all_enable_disable();
+			player_lock();
+			player_command_finished_locked();
+			break;
+
 		case PLAYER_COMMAND_EXIT:
+			player_unlock();
+
 			dc_quit();
 			audio_output_all_close();
 			music_buffer_free(player_buffer);
+
 			player_command_finished();
-			g_thread_exit(NULL);
-			break;
+			return NULL;
 
 		case PLAYER_COMMAND_CANCEL:
 			pc.next_song = NULL;
-			player_command_finished();
+			player_command_finished_locked();
+			break;
+
+		case PLAYER_COMMAND_REFRESH:
+			/* no-op when not playing */
+			player_command_finished_locked();
 			break;
 
 		case PLAYER_COMMAND_NONE:
-			notify_wait(&pc.notify);
+			player_wait();
 			break;
 		}
 	}
-	return NULL;
 }
 
 void player_create(void)