1 files changed, 463 insertions, 109 deletions

diff --git a/src/output_thread.c b/src/output_thread.c
index 035cf99c1..380956fac 100644
--- a/src/output_thread.c
+++ b/src/output_thread.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -17,12 +17,18 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include "config.h"
 #include "output_thread.h"
 #include "output_api.h"
 #include "output_internal.h"
 #include "chunk.h"
 #include "pipe.h"
 #include "player_control.h"
+#include "pcm_mix.h"
+#include "filter_plugin.h"
+#include "filter/convert_filter_plugin.h"
+#include "filter/replay_gain_filter_plugin.h"
+#include "mpd_error.h"
 
 #include <glib.h>
 
@@ -37,71 +43,423 @@ static void ao_command_finished(struct audio_output *ao)
 {
 	assert(ao->command != AO_COMMAND_NONE);
 	ao->command = AO_COMMAND_NONE;
+
+	g_mutex_unlock(ao->mutex);
 	notify_signal(&audio_output_client_notify);
+	g_mutex_lock(ao->mutex);
+}
+
+static bool
+ao_enable(struct audio_output *ao)
+{
+	GError *error = NULL;
+	bool success;
+
+	if (ao->really_enabled)
+		return true;
+
+	g_mutex_unlock(ao->mutex);
+	success = ao_plugin_enable(ao->plugin, ao->data, &error);
+	g_mutex_lock(ao->mutex);
+	if (!success) {
+		g_warning("Failed to enable \"%s\" [%s]: %s\n",
+			  ao->name, ao->plugin->name, error->message);
+		g_error_free(error);
+		return false;
+	}
+
+	ao->really_enabled = true;
+	return true;
+}
+
+static void
+ao_close(struct audio_output *ao, bool drain);
+
+static void
+ao_disable(struct audio_output *ao)
+{
+	if (ao->open)
+		ao_close(ao, false);
+
+	if (ao->really_enabled) {
+		ao->really_enabled = false;
+
+		g_mutex_unlock(ao->mutex);
+		ao_plugin_disable(ao->plugin, ao->data);
+		g_mutex_lock(ao->mutex);
+	}
+}
+
+static const struct audio_format *
+ao_filter_open(struct audio_output *ao,
+	       struct audio_format *audio_format,
+	       GError **error_r)
+{
+	/* the replay_gain filter cannot fail here */
+	if (ao->replay_gain_filter != NULL)
+		filter_open(ao->replay_gain_filter, audio_format, error_r);
+	if (ao->other_replay_gain_filter != NULL)
+		filter_open(ao->other_replay_gain_filter, audio_format,
+			    error_r);
+
+	const struct audio_format *af
+		= filter_open(ao->filter, audio_format, error_r);
+	if (af == NULL) {
+		if (ao->replay_gain_filter != NULL)
+			filter_close(ao->replay_gain_filter);
+		if (ao->other_replay_gain_filter != NULL)
+			filter_close(ao->other_replay_gain_filter);
+	}
+
+	return af;
+}
+
+static void
+ao_filter_close(struct audio_output *ao)
+{
+	if (ao->replay_gain_filter != NULL)
+		filter_close(ao->replay_gain_filter);
+	if (ao->other_replay_gain_filter != NULL)
+		filter_close(ao->other_replay_gain_filter);
+
+	filter_close(ao->filter);
+}
+
+static void
+ao_open(struct audio_output *ao)
+{
+	bool success;
+	GError *error = NULL;
+	const struct audio_format *filter_audio_format;
+	struct audio_format_string af_string;
+
+	assert(!ao->open);
+	assert(ao->pipe != NULL);
+	assert(ao->chunk == NULL);
+
+	if (ao->fail_timer != NULL) {
+		/* this can only happen when this
+		   output thread fails while
+		   audio_output_open() is run in the
+		   player thread */
+		g_timer_destroy(ao->fail_timer);
+		ao->fail_timer = NULL;
+	}
+
+	/* enable the device (just in case the last enable has failed) */
+
+	if (!ao_enable(ao))
+		/* still no luck */
+		return;
+
+	/* open the filter */
+
+	filter_audio_format = ao_filter_open(ao, &ao->in_audio_format, &error);
+	if (filter_audio_format == NULL) {
+		g_warning("Failed to open filter for \"%s\" [%s]: %s",
+			  ao->name, ao->plugin->name, error->message);
+		g_error_free(error);
+
+		ao->fail_timer = g_timer_new();
+		return;
+	}
+
+	ao->out_audio_format = *filter_audio_format;
+	audio_format_mask_apply(&ao->out_audio_format,
+				&ao->config_audio_format);
+
+	g_mutex_unlock(ao->mutex);
+	success = ao_plugin_open(ao->plugin, ao->data,
+				 &ao->out_audio_format,
+				 &error);
+	g_mutex_lock(ao->mutex);
+
+	assert(!ao->open);
+
+	if (!success) {
+		g_warning("Failed to open \"%s\" [%s]: %s",
+			  ao->name, ao->plugin->name, error->message);
+		g_error_free(error);
+
+		ao_filter_close(ao);
+		ao->fail_timer = g_timer_new();
+		return;
+	}
+
+	convert_filter_set(ao->convert_filter, &ao->out_audio_format);
+
+	ao->open = true;
+
+	g_debug("opened plugin=%s name=\"%s\" "
+		"audio_format=%s",
+		ao->plugin->name, ao->name,
+		audio_format_to_string(&ao->out_audio_format, &af_string));
+
+	if (!audio_format_equals(&ao->in_audio_format,
+				 &ao->out_audio_format))
+		g_debug("converting from %s",
+			audio_format_to_string(&ao->in_audio_format,
+					       &af_string));
 }
 
 static void
-ao_close(struct audio_output *ao)
+ao_close(struct audio_output *ao, bool drain)
 {
 	assert(ao->open);
 
 	ao->pipe = NULL;
 
-	g_mutex_lock(ao->mutex);
 	ao->chunk = NULL;
 	ao->open = false;
+
 	g_mutex_unlock(ao->mutex);
 
+	if (drain)
+		ao_plugin_drain(ao->plugin, ao->data);
+	else
+		ao_plugin_cancel(ao->plugin, ao->data);
+
 	ao_plugin_close(ao->plugin, ao->data);
-	pcm_convert_deinit(&ao->convert_state);
+	ao_filter_close(ao);
+
+	g_mutex_lock(ao->mutex);
 
 	g_debug("closed plugin=%s name=\"%s\"", ao->plugin->name, ao->name);
 }
 
-static bool
-ao_play_chunk(struct audio_output *ao, const struct music_chunk *chunk)
+static void
+ao_reopen_filter(struct audio_output *ao)
 {
-	const char *data = chunk->data;
-	size_t size = chunk->length;
+	const struct audio_format *filter_audio_format;
 	GError *error = NULL;
 
+	ao_filter_close(ao);
+	filter_audio_format = ao_filter_open(ao, &ao->in_audio_format, &error);
+	if (filter_audio_format == NULL) {
+		g_warning("Failed to open filter for \"%s\" [%s]: %s",
+			  ao->name, ao->plugin->name, error->message);
+		g_error_free(error);
+
+		/* this is a little code duplication fro ao_close(),
+		   but we cannot call this function because we must
+		   not call filter_close(ao->filter) again */
+
+		ao->pipe = NULL;
+
+		ao->chunk = NULL;
+		ao->open = false;
+		ao->fail_timer = g_timer_new();
+
+		g_mutex_unlock(ao->mutex);
+		ao_plugin_close(ao->plugin, ao->data);
+		g_mutex_lock(ao->mutex);
+
+		return;
+	}
+
+	convert_filter_set(ao->convert_filter, &ao->out_audio_format);
+}
+
+static void
+ao_reopen(struct audio_output *ao)
+{
+	if (!audio_format_fully_defined(&ao->config_audio_format)) {
+		if (ao->open) {
+			const struct music_pipe *mp = ao->pipe;
+			ao_close(ao, true);
+			ao->pipe = mp;
+		}
+
+		/* no audio format is configured: copy in->out, let
+		   the output's open() method determine the effective
+		   out_audio_format */
+		ao->out_audio_format = ao->in_audio_format;
+		audio_format_mask_apply(&ao->out_audio_format,
+					&ao->config_audio_format);
+	}
+
+	if (ao->open)
+		/* the audio format has changed, and all filters have
+		   to be reconfigured */
+		ao_reopen_filter(ao);
+	else
+		ao_open(ao);
+}
+
+/**
+ * Wait until the output's delay reaches zero.
+ *
+ * @return true if playback should be continued, false if a command
+ * was issued
+ */
+static bool
+ao_wait(struct audio_output *ao)
+{
+	while (true) {
+		unsigned delay = ao_plugin_delay(ao->plugin, ao->data);
+		if (delay == 0)
+			return true;
+
+		GTimeVal tv;
+		g_get_current_time(&tv);
+		g_time_val_add(&tv, delay * 1000);
+		g_cond_timed_wait(ao->cond, ao->mutex, &tv);
+
+		if (ao->command != AO_COMMAND_NONE)
+			return false;
+	}
+}
+
+static const char *
+ao_chunk_data(struct audio_output *ao, const struct music_chunk *chunk,
+	      struct filter *replay_gain_filter,
+	      unsigned *replay_gain_serial_p,
+	      size_t *length_r)
+{
+	assert(chunk != NULL);
 	assert(!music_chunk_is_empty(chunk));
 	assert(music_chunk_check_format(chunk, &ao->in_audio_format));
-	assert(size % audio_format_frame_size(&ao->in_audio_format) == 0);
 
-	if (chunk->tag != NULL)
+	const char *data = chunk->data;
+	size_t length = chunk->length;
+
+	(void)ao;
+
+	assert(length % audio_format_frame_size(&ao->in_audio_format) == 0);
+
+	if (length > 0 && replay_gain_filter != NULL) {
+		if (chunk->replay_gain_serial != *replay_gain_serial_p) {
+			replay_gain_filter_set_info(replay_gain_filter,
+						    chunk->replay_gain_serial != 0
+						    ? &chunk->replay_gain_info
+						    : NULL);
+			*replay_gain_serial_p = chunk->replay_gain_serial;
+		}
+
+		GError *error = NULL;
+		data = filter_filter(replay_gain_filter, data, length,
+				     &length, &error);
+		if (data == NULL) {
+			g_warning("\"%s\" [%s] failed to filter: %s",
+				  ao->name, ao->plugin->name, error->message);
+			g_error_free(error);
+			return NULL;
+		}
+	}
+
+	*length_r = length;
+	return data;
+}
+
+static const char *
+ao_filter_chunk(struct audio_output *ao, const struct music_chunk *chunk,
+		size_t *length_r)
+{
+	GError *error = NULL;
+
+	size_t length;
+	const char *data = ao_chunk_data(ao, chunk, ao->replay_gain_filter,
+					 &ao->replay_gain_serial, &length);
+	if (data == NULL)
+		return NULL;
+
+	if (length == 0) {
+		/* empty chunk, nothing to do */
+		*length_r = 0;
+		return data;
+	}
+
+	/* cross-fade */
+
+	if (chunk->other != NULL) {
+		size_t other_length;
+		const char *other_data =
+			ao_chunk_data(ao, chunk->other,
+				      ao->other_replay_gain_filter,
+				      &ao->other_replay_gain_serial,
+				      &other_length);
+		if (other_data == NULL)
+			return NULL;
+
+		if (other_length == 0) {
+			*length_r = 0;
+			return data;
+		}
+
+		/* if the "other" chunk is longer, then that trailer
+		   is used as-is, without mixing; it is part of the
+		   "next" song being faded in, and if there's a rest,
+		   it means cross-fading ends here */
+
+		if (length > other_length)
+			length = other_length;
+
+		char *dest = pcm_buffer_get(&ao->cross_fade_buffer,
+					    other_length);
+		memcpy(dest, other_data, other_length);
+		pcm_mix(dest, data, length, &ao->in_audio_format,
+			1.0 - chunk->mix_ratio);
+
+		data = dest;
+		length = other_length;
+	}
+
+	/* apply filter chain */
+
+	data = filter_filter(ao->filter, data, length, &length, &error);
+	if (data == NULL) {
+		g_warning("\"%s\" [%s] failed to filter: %s",
+			  ao->name, ao->plugin->name, error->message);
+		g_error_free(error);
+		return NULL;
+	}
+
+	*length_r = length;
+	return data;
+}
+
+static bool
+ao_play_chunk(struct audio_output *ao, const struct music_chunk *chunk)
+{
+	GError *error = NULL;
+
+	assert(ao != NULL);
+	assert(ao->filter != NULL);
+
+	if (chunk->tag != NULL) {
+		g_mutex_unlock(ao->mutex);
 		ao_plugin_send_tag(ao->plugin, ao->data, chunk->tag);
+		g_mutex_lock(ao->mutex);
+	}
 
-	if (size == 0)
-		return true;
+	size_t size;
+	const char *data = ao_filter_chunk(ao, chunk, &size);
+	if (data == NULL) {
+		ao_close(ao, false);
 
-	if (!audio_format_equals(&ao->in_audio_format,
-				 &ao->out_audio_format)) {
-		data = pcm_convert(&ao->convert_state,
-				   &ao->in_audio_format, data, size,
-				   &ao->out_audio_format, &size);
-
-		/* under certain circumstances, pcm_convert() may
-		   return an empty buffer - this condition should be
-		   investigated further, but for now, do this check as
-		   a workaround: */
-		if (data == NULL)
-			return true;
+		/* don't automatically reopen this device for 10
+		   seconds */
+		ao->fail_timer = g_timer_new();
+		return false;
 	}
 
 	while (size > 0 && ao->command == AO_COMMAND_NONE) {
 		size_t nbytes;
 
+		if (!ao_wait(ao))
+			break;
+
+		g_mutex_unlock(ao->mutex);
 		nbytes = ao_plugin_play(ao->plugin, ao->data, data, size,
 					&error);
+		g_mutex_lock(ao->mutex);
 		if (nbytes == 0) {
 			/* play()==0 means failure */
 			g_warning("\"%s\" [%s] failed to play: %s",
 				  ao->name, ao->plugin->name, error->message);
 			g_error_free(error);
 
-			ao_plugin_cancel(ao->plugin, ao->data);
-			ao_close(ao);
+			ao_close(ao, false);
 
 			/* don't automatically reopen this device for
 			   10 seconds */
@@ -124,32 +482,45 @@ ao_play_chunk(struct audio_output *ao, const struct music_chunk *chunk)
 	return true;
 }
 
-static void ao_play(struct audio_output *ao)
+static const struct music_chunk *
+ao_next_chunk(struct audio_output *ao)
+{
+	return ao->chunk != NULL
+		/* continue the previous play() call */
+		? ao->chunk->next
+		/* get the first chunk from the pipe */
+		: music_pipe_peek(ao->pipe);
+}
+
+/**
+ * Plays all remaining chunks, until the tail of the pipe has been
+ * reached (and no more chunks are queued), or until a command is
+ * received.
+ *
+ * @return true if at least one chunk has been available, false if the
+ * tail of the pipe was already reached
+ */
+static bool
+ao_play(struct audio_output *ao)
 {
 	bool success;
 	const struct music_chunk *chunk;
 
 	assert(ao->pipe != NULL);
 
-	g_mutex_lock(ao->mutex);
-	chunk = ao->chunk;
-	if (chunk != NULL)
-		/* continue the previous play() call */
-		chunk = chunk->next;
-	else
-		chunk = music_pipe_peek(ao->pipe);
+	chunk = ao_next_chunk(ao);
+	if (chunk == NULL)
+		/* no chunk available */
+		return false;
+
 	ao->chunk_finished = false;
 
 	while (chunk != NULL && ao->command == AO_COMMAND_NONE) {
 		assert(!ao->chunk_finished);
 
 		ao->chunk = chunk;
-		g_mutex_unlock(ao->mutex);
 
 		success = ao_play_chunk(ao, chunk);
-
-		g_mutex_lock(ao->mutex);
-
 		if (!success) {
 			assert(ao->chunk == NULL);
 			break;
@@ -160,23 +531,35 @@ static void ao_play(struct audio_output *ao)
 	}
 
 	ao->chunk_finished = true;
+
 	g_mutex_unlock(ao->mutex);
+	player_lock_signal();
+	g_mutex_lock(ao->mutex);
 
-	notify_signal(&pc.notify);
+	return true;
 }
 
 static void ao_pause(struct audio_output *ao)
 {
 	bool ret;
 
+	g_mutex_unlock(ao->mutex);
 	ao_plugin_cancel(ao->plugin, ao->data);
+	g_mutex_lock(ao->mutex);
+
 	ao->pause = true;
 	ao_command_finished(ao);
 
 	do {
+		if (!ao_wait(ao))
+			break;
+
+		g_mutex_unlock(ao->mutex);
 		ret = ao_plugin_pause(ao->plugin, ao->data);
+		g_mutex_lock(ao->mutex);
+
 		if (!ret) {
-			ao_close(ao);
+			ao_close(ao, false);
 			break;
 		}
 	} while (ao->command == AO_COMMAND_NONE);
@@ -187,64 +570,31 @@ static void ao_pause(struct audio_output *ao)
 static gpointer audio_output_task(gpointer arg)
 {
 	struct audio_output *ao = arg;
-	bool ret;
-	GError *error;
+
+	g_mutex_lock(ao->mutex);
 
 	while (1) {
 		switch (ao->command) {
 		case AO_COMMAND_NONE:
 			break;
 
-		case AO_COMMAND_OPEN:
-			assert(!ao->open);
-			assert(ao->pipe != NULL);
-			assert(ao->chunk == NULL);
-
-			if (ao->fail_timer != NULL) {
-				/* this can only happen when this
-				   output thread fails while
-				   audio_output_open() is run in the
-				   player thread */
-				g_timer_destroy(ao->fail_timer);
-				ao->fail_timer = NULL;
-			}
-
-			error = NULL;
-			ret = ao_plugin_open(ao->plugin, ao->data,
-					     &ao->out_audio_format,
-					     &error);
-
-			assert(!ao->open);
-			if (ret) {
-				pcm_convert_init(&ao->convert_state);
+		case AO_COMMAND_ENABLE:
+			ao_enable(ao);
+			ao_command_finished(ao);
+			break;
 
-				g_mutex_lock(ao->mutex);
-				ao->open = true;
-				g_mutex_unlock(ao->mutex);
+		case AO_COMMAND_DISABLE:
+			ao_disable(ao);
+			ao_command_finished(ao);
+			break;
 
-				g_debug("opened plugin=%s name=\"%s\" "
-					"audio_format=%u:%u:%u",
-					ao->plugin->name,
-					ao->name,
-					ao->out_audio_format.sample_rate,
-					ao->out_audio_format.bits,
-					ao->out_audio_format.channels);
-
-				if (!audio_format_equals(&ao->in_audio_format,
-							 &ao->out_audio_format))
-					g_debug("converting from %u:%u:%u",
-						ao->in_audio_format.sample_rate,
-						ao->in_audio_format.bits,
-						ao->in_audio_format.channels);
-			} else {
-				g_warning("Failed to open \"%s\" [%s]: %s",
-					  ao->name, ao->plugin->name,
-					  error->message);
-				g_error_free(error);
-
-				ao->fail_timer = g_timer_new();
-			}
+		case AO_COMMAND_OPEN:
+			ao_open(ao);
+			ao_command_finished(ao);
+			break;
 
+		case AO_COMMAND_REOPEN:
+			ao_reopen(ao);
 			ao_command_finished(ao);
 			break;
 
@@ -252,11 +602,7 @@ static gpointer audio_output_task(gpointer arg)
 			assert(ao->open);
 			assert(ao->pipe != NULL);
 
-			ao->pipe = NULL;
-			ao->chunk = NULL;
-
-			ao_plugin_cancel(ao->plugin, ao->data);
-			ao_close(ao);
+			ao_close(ao, false);
 			ao_command_finished(ao);
 			break;
 
@@ -277,38 +623,46 @@ static gpointer audio_output_task(gpointer arg)
 			   the new command first */
 			continue;
 
+		case AO_COMMAND_DRAIN:
+			if (ao->open) {
+				assert(ao->chunk == NULL);
+				assert(music_pipe_peek(ao->pipe) == NULL);
+
+				g_mutex_unlock(ao->mutex);
+				ao_plugin_drain(ao->plugin, ao->data);
+				g_mutex_lock(ao->mutex);
+			}
+
+			ao_command_finished(ao);
+			continue;
+
 		case AO_COMMAND_CANCEL:
 			ao->chunk = NULL;
 			if (ao->open)
 				ao_plugin_cancel(ao->plugin, ao->data);
-
-			/* we must clear the notification now, because
-			   the notify_wait() call below must wait
-			   until audio_output_all_cancel() has cleared
-			   the pipe; if another notification happens
-			   to be still pending, we get a race
-			   condition with a crash or an assertion
-			   failure */
-			notify_clear(&ao->notify);
-
 			ao_command_finished(ao);
 
 			/* the player thread will now clear our music
 			   pipe - wait for a notify, to give it some
 			   time */
-			notify_wait(&ao->notify);
+			if (ao->command == AO_COMMAND_NONE)
+				g_cond_wait(ao->cond, ao->mutex);
 			continue;
 
 		case AO_COMMAND_KILL:
 			ao->chunk = NULL;
 			ao_command_finished(ao);
+			g_mutex_unlock(ao->mutex);
 			return NULL;
 		}
 
-		if (ao->open)
-			ao_play(ao);
+		if (ao->open && ao_play(ao))
+			/* don't wait for an event if there are more
+			   chunks in the pipe */
+			continue;
 
-		notify_wait(&ao->notify);
+		if (ao->command == AO_COMMAND_NONE)
+			g_cond_wait(ao->cond, ao->mutex);
 	}
 }
 
@@ -319,5 +673,5 @@ void audio_output_thread_start(struct audio_output *ao)
 	assert(ao->command == AO_COMMAND_NONE);
 
 	if (!(ao->thread = g_thread_create(audio_output_task, ao, true, &e)))
-		g_error("Failed to spawn output task: %s\n", e->message);
+		MPD_ERROR("Failed to spawn output task: %s\n", e->message);
 }