audio: moved code to output_all.c

Moved code which deals with all audio outputs at once into a separate
library.

10 files changed, 366 insertions, 298 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 140c0f436..98fe8bea7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -39,6 +39,7 @@ mpd_headers = \
 	output_internal.h \
 	output_api.h \
 	output_list.h \
+	output_all.h \
 	output_thread.h \
 	output_control.h \
 	output_state.h \
@@ -138,6 +139,7 @@ mpd_SOURCES = \
 	audioOutput.c \
 	output_api.c \
 	output_list.c \
+	output_all.c \
 	output_thread.c \
 	output_control.c \
 	output_state.c \
diff --git a/src/audio.c b/src/audio.c
index 56aa70921..d3e66fdb2 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -21,6 +21,7 @@
 #include "output_api.h"
 #include "output_control.h"
 #include "output_internal.h"
+#include "output_all.h"
 #include "path.h"
 #include "idle.h"
 #include "mixer_api.h"
@@ -31,94 +32,6 @@
 #include <stdlib.h>
 
 static struct audio_format configured_audio_format;
-static struct audio_format input_audio_format;
-
-static struct audio_output *audioOutputArray;
-static unsigned int audioOutputArraySize;
-
-unsigned int audio_output_count(void)
-{
-	return audioOutputArraySize;
-}
-
-struct audio_output *
-audio_output_get(unsigned i)
-{
-	assert(i < audioOutputArraySize);
-
-	return &audioOutputArray[i];
-}
-
-struct audio_output *
-audio_output_find(const char *name)
-{
-	for (unsigned i = 0; i < audioOutputArraySize; ++i) {
-		struct audio_output *ao = audio_output_get(i);
-
-		if (strcmp(ao->name, name) == 0)
-			return ao;
-	}
-
-	/* name not found */
-	return NULL;
-}
-
-static unsigned
-audio_output_config_count(void)
-{
-	unsigned int nr = 0;
-	const struct config_param *param = NULL;
-
-	while ((param = config_get_next_param(CONF_AUDIO_OUTPUT, param)))
-		nr++;
-	if (!nr)
-		nr = 1; /* we'll always have at least one device  */
-	return nr;
-}
-
-/* make sure initPlayerData is called before this function!! */
-void initAudioDriver(void)
-{
-	const struct config_param *param = NULL;
-	unsigned int i;
-
-	notify_init(&audio_output_client_notify);
-
-	audioOutputArraySize = audio_output_config_count();
-	audioOutputArray = g_new(struct audio_output, audioOutputArraySize);
-
-	for (i = 0; i < audioOutputArraySize; i++)
-	{
-		struct audio_output *output = &audioOutputArray[i];
-		unsigned int j;
-
-		param = config_get_next_param(CONF_AUDIO_OUTPUT, param);
-
-		/* only allow param to be NULL if there just one audioOutput */
-		assert(param || (audioOutputArraySize == 1));
-
-		if (!audio_output_init(output, param)) {
-			if (param)
-			{
-				g_error("problems configuring output device "
-					"defined at line %i\n", param->line);
-			}
-			else
-			{
-				g_error("No audio_output specified and unable to "
-					"detect a default audio output device\n");
-			}
-		}
-
-		/* require output names to be unique: */
-		for (j = 0; j < i; j++) {
-			if (!strcmp(output->name, audioOutputArray[j].name)) {
-				g_error("output devices with identical "
-					"names: %s\n", output->name);
-			}
-		}
-	}
-}
 
 void getOutputAudioFormat(const struct audio_format *inAudioFormat,
 			  struct audio_format *outAudioFormat)
@@ -199,171 +112,17 @@ void finishAudioConfig(void)
 	audio_format_clear(&configured_audio_format);
 }
 
-void finishAudioDriver(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < audioOutputArraySize; i++) {
-		audio_output_finish(&audioOutputArray[i]);
-	}
-
-	g_free(audioOutputArray);
-	audioOutputArray = NULL;
-	audioOutputArraySize = 0;
-
-	notify_deinit(&audio_output_client_notify);
-}
-
-static void audio_output_wait_all(void)
-{
-	unsigned i;
-
-	while (1) {
-		int finished = 1;
-
-		for (i = 0; i < audioOutputArraySize; ++i)
-			if (audio_output_is_open(&audioOutputArray[i]) &&
-			    !audio_output_command_is_finished(&audioOutputArray[i]))
-				finished = 0;
-
-		if (finished)
-			break;
-
-		notify_wait(&audio_output_client_notify);
-	};
-}
-
-static void syncAudioDeviceStates(void)
-{
-	unsigned int i;
-
-	if (!audio_format_defined(&input_audio_format))
-		return;
-
-	for (i = 0; i < audioOutputArraySize; ++i)
-		audio_output_update(&audioOutputArray[i], &input_audio_format);
-}
-
-bool playAudio(const char *buffer, size_t length)
-{
-	bool ret = false;
-	unsigned int i;
-
-	assert(length > 0);
-	/* no partial frames allowed */
-	assert((length % audio_format_frame_size(&input_audio_format)) == 0);
-
-	syncAudioDeviceStates();
-
-	for (i = 0; i < audioOutputArraySize; ++i)
-		if (audio_output_is_open(&audioOutputArray[i]))
-			audio_output_play(&audioOutputArray[i],
-					  buffer, length);
-
-	while (true) {
-		bool finished = true;
-
-		for (i = 0; i < audioOutputArraySize; ++i) {
-			struct audio_output *ao = &audioOutputArray[i];
-
-			if (!audio_output_is_open(ao))
-				continue;
-
-			if (audio_output_command_is_finished(ao))
-				ret = true;
-			else {
-				finished = false;
-				audio_output_signal(ao);
-			}
-		}
-
-		if (finished)
-			break;
-
-		notify_wait(&audio_output_client_notify);
-	};
-
-	return ret;
-}
-
-bool openAudioDevice(const struct audio_format *audioFormat)
-{
-	bool ret = false;
-	unsigned int i;
-
-	if (!audioOutputArray)
-		return false;
-
-	if (audioFormat != NULL)
-		input_audio_format = *audioFormat;
-
-	syncAudioDeviceStates();
-
-	for (i = 0; i < audioOutputArraySize; ++i) {
-		if (audioOutputArray[i].open)
-			ret = true;
-	}
-
-	if (!ret)
-		/* close all devices if there was an error */
-		closeAudioDevice();
-
-	return ret;
-}
-
-void audio_output_pause_all(void)
-{
-	unsigned int i;
-
-	syncAudioDeviceStates();
-
-	for (i = 0; i < audioOutputArraySize; ++i)
-		if (audio_output_is_open(&audioOutputArray[i]))
-			audio_output_pause(&audioOutputArray[i]);
-
-	audio_output_wait_all();
-}
-
-void dropBufferedAudio(void)
-{
-	unsigned int i;
-
-	syncAudioDeviceStates();
-
-	for (i = 0; i < audioOutputArraySize; ++i) {
-		if (audio_output_is_open(&audioOutputArray[i]))
-			audio_output_cancel(&audioOutputArray[i]);
-	}
-
-	audio_output_wait_all();
-}
-
-void closeAudioDevice(void)
-{
-	unsigned int i;
-
-	for (i = 0; i < audioOutputArraySize; ++i)
-		audio_output_close(&audioOutputArray[i]);
-}
-
-void sendMetadataToAudioDevice(const struct tag *tag)
-{
-	unsigned int i;
-
-	for (i = 0; i < audioOutputArraySize; ++i)
-		if (audio_output_is_open(&audioOutputArray[i]))
-			audio_output_send_tag(&audioOutputArray[i], tag);
-
-	audio_output_wait_all();
-}
-
 int enableAudioDevice(unsigned int device)
 {
-	if (device >= audioOutputArraySize)
+	struct audio_output *ao;
+
+	if (device >= audio_output_count())
 		return -1;
 
-	audioOutputArray[device].reopen_after = 0;
-	audioOutputArray[device].enabled = true;
+	ao = audio_output_get(device);
+
+	ao->reopen_after = 0;
+	ao->enabled = true;
 	idle_add(IDLE_OUTPUT);
 
 	return 0;
@@ -371,10 +130,14 @@ int enableAudioDevice(unsigned int device)
 
 int disableAudioDevice(unsigned int device)
 {
-	if (device >= audioOutputArraySize)
+	struct audio_output *ao;
+
+	if (device >= audio_output_count())
 		return -1;
 
-	audioOutputArray[device].enabled = false;
+	ao = audio_output_get(device);
+
+	ao->enabled = false;
 	idle_add(IDLE_OUTPUT);
 
 	return 0;
@@ -383,10 +146,11 @@ int disableAudioDevice(unsigned int device)
 bool mixer_control_setvol(unsigned int device, int volume, int rel)
 {
 	struct audio_output *output;
-	if (device >= audioOutputArraySize)
+
+	if (device >= audio_output_count())
 		return false;
 
-	output = &audioOutputArray[device];
+	output = audio_output_get(device);
 	if (output->plugin && output->plugin->control) {
 		if (rel) {
 			int cur_volume;
@@ -408,10 +172,11 @@ bool mixer_control_setvol(unsigned int device, int volume, int rel)
 bool mixer_control_getvol(unsigned int device, int *volume)
 {
 	struct audio_output *output;
-	if (device >= audioOutputArraySize)
+
+	if (device >= audio_output_count())
 		return false;
 
-	output = &audioOutputArray[device];
+	output = audio_output_get(device);
 	if (output->plugin && output->plugin->control) {
 		return output->plugin->control(output->data, AC_MIXER_GETVOL, volume);
 	}
diff --git a/src/audio.h b/src/audio.h
index 2ccebc358..865890485 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -20,32 +20,8 @@
 #define MPD_AUDIO_H
 
 #include <stdbool.h>
-#include <stddef.h>
-
-#define AUDIO_AO_DRIVER_DEFAULT	"default"
 
 struct audio_format;
-struct tag;
-struct config_param;
-
-/**
- * Returns the total number of audio output devices, including those
- * who are disabled right now.
- */
-unsigned int audio_output_count(void);
-
-/**
- * Returns the "i"th audio output device.
- */
-struct audio_output *
-audio_output_get(unsigned i);
-
-/**
- * Returns the audio output device with the specified name.  Returns
- * NULL if the name does not exist.
- */
-struct audio_output *
-audio_output_find(const char *name);
 
 void getOutputAudioFormat(const struct audio_format *inFormat,
 			  struct audio_format *outFormat);
@@ -57,22 +33,6 @@ void initAudioConfig(void);
 
 void finishAudioConfig(void);
 
-void initAudioDriver(void);
-
-void finishAudioDriver(void);
-
-bool openAudioDevice(const struct audio_format *audioFormat);
-
-bool playAudio(const char *playChunk, size_t size);
-
-void audio_output_pause_all(void);
-
-void dropBufferedAudio(void);
-
-void closeAudioDevice(void);
-
-void sendMetadataToAudioDevice(const struct tag *tag);
-
 /* these functions are called in the main parent process while the child
 	process is busy playing to the audio */
 int enableAudioDevice(unsigned int device);
diff --git a/src/main.c b/src/main.c
index 7df773146..5dc07975e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -37,6 +37,7 @@
 #include "stats.h"
 #include "sig_handlers.h"
 #include "audio.h"
+#include "output_all.h"
 #include "volume.h"
 #include "log.h"
 #include "permission.h"
diff --git a/src/output_all.c b/src/output_all.c
new file mode 100644
index 000000000..dff84e04a
--- /dev/null
+++ b/src/output_all.c
@@ -0,0 +1,270 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "output_all.h"
+#include "output_internal.h"
+#include "output_control.h"
+
+#include <assert.h>
+
+static struct audio_format input_audio_format;
+
+static struct audio_output *audioOutputArray;
+static unsigned int audioOutputArraySize;
+
+unsigned int audio_output_count(void)
+{
+	return audioOutputArraySize;
+}
+
+struct audio_output *
+audio_output_get(unsigned i)
+{
+	assert(i < audioOutputArraySize);
+
+	return &audioOutputArray[i];
+}
+
+struct audio_output *
+audio_output_find(const char *name)
+{
+	for (unsigned i = 0; i < audioOutputArraySize; ++i) {
+		struct audio_output *ao = audio_output_get(i);
+
+		if (strcmp(ao->name, name) == 0)
+			return ao;
+	}
+
+	/* name not found */
+	return NULL;
+}
+
+static unsigned
+audio_output_config_count(void)
+{
+	unsigned int nr = 0;
+	const struct config_param *param = NULL;
+
+	while ((param = config_get_next_param(CONF_AUDIO_OUTPUT, param)))
+		nr++;
+	if (!nr)
+		nr = 1; /* we'll always have at least one device  */
+	return nr;
+}
+
+/* make sure initPlayerData is called before this function!! */
+void initAudioDriver(void)
+{
+	const struct config_param *param = NULL;
+	unsigned int i;
+
+	notify_init(&audio_output_client_notify);
+
+	audioOutputArraySize = audio_output_config_count();
+	audioOutputArray = g_new(struct audio_output, audioOutputArraySize);
+
+	for (i = 0; i < audioOutputArraySize; i++)
+	{
+		struct audio_output *output = &audioOutputArray[i];
+		unsigned int j;
+
+		param = config_get_next_param(CONF_AUDIO_OUTPUT, param);
+
+		/* only allow param to be NULL if there just one audioOutput */
+		assert(param || (audioOutputArraySize == 1));
+
+		if (!audio_output_init(output, param)) {
+			if (param)
+			{
+				g_error("problems configuring output device "
+					"defined at line %i\n", param->line);
+			}
+			else
+			{
+				g_error("No audio_output specified and unable to "
+					"detect a default audio output device\n");
+			}
+		}
+
+		/* require output names to be unique: */
+		for (j = 0; j < i; j++) {
+			if (!strcmp(output->name, audioOutputArray[j].name)) {
+				g_error("output devices with identical "
+					"names: %s\n", output->name);
+			}
+		}
+	}
+}
+
+void finishAudioDriver(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < audioOutputArraySize; i++) {
+		audio_output_finish(&audioOutputArray[i]);
+	}
+
+	g_free(audioOutputArray);
+	audioOutputArray = NULL;
+	audioOutputArraySize = 0;
+
+	notify_deinit(&audio_output_client_notify);
+}
+
+static void audio_output_wait_all(void)
+{
+	unsigned i;
+
+	while (1) {
+		int finished = 1;
+
+		for (i = 0; i < audioOutputArraySize; ++i)
+			if (audio_output_is_open(&audioOutputArray[i]) &&
+			    !audio_output_command_is_finished(&audioOutputArray[i]))
+				finished = 0;
+
+		if (finished)
+			break;
+
+		notify_wait(&audio_output_client_notify);
+	};
+}
+
+static void syncAudioDeviceStates(void)
+{
+	unsigned int i;
+
+	if (!audio_format_defined(&input_audio_format))
+		return;
+
+	for (i = 0; i < audioOutputArraySize; ++i)
+		audio_output_update(&audioOutputArray[i], &input_audio_format);
+}
+
+bool playAudio(const char *buffer, size_t length)
+{
+	bool ret = false;
+	unsigned int i;
+
+	assert(length > 0);
+	/* no partial frames allowed */
+	assert((length % audio_format_frame_size(&input_audio_format)) == 0);
+
+	syncAudioDeviceStates();
+
+	for (i = 0; i < audioOutputArraySize; ++i)
+		if (audio_output_is_open(&audioOutputArray[i]))
+			audio_output_play(&audioOutputArray[i],
+					  buffer, length);
+
+	while (true) {
+		bool finished = true;
+
+		for (i = 0; i < audioOutputArraySize; ++i) {
+			struct audio_output *ao = &audioOutputArray[i];
+
+			if (!audio_output_is_open(ao))
+				continue;
+
+			if (audio_output_command_is_finished(ao))
+				ret = true;
+			else {
+				finished = false;
+				audio_output_signal(ao);
+			}
+		}
+
+		if (finished)
+			break;
+
+		notify_wait(&audio_output_client_notify);
+	};
+
+	return ret;
+}
+
+bool openAudioDevice(const struct audio_format *audioFormat)
+{
+	bool ret = false;
+	unsigned int i;
+
+	if (!audioOutputArray)
+		return false;
+
+	if (audioFormat != NULL)
+		input_audio_format = *audioFormat;
+
+	syncAudioDeviceStates();
+
+	for (i = 0; i < audioOutputArraySize; ++i) {
+		if (audioOutputArray[i].open)
+			ret = true;
+	}
+
+	if (!ret)
+		/* close all devices if there was an error */
+		closeAudioDevice();
+
+	return ret;
+}
+
+void audio_output_pause_all(void)
+{
+	unsigned int i;
+
+	syncAudioDeviceStates();
+
+	for (i = 0; i < audioOutputArraySize; ++i)
+		if (audio_output_is_open(&audioOutputArray[i]))
+			audio_output_pause(&audioOutputArray[i]);
+
+	audio_output_wait_all();
+}
+
+void dropBufferedAudio(void)
+{
+	unsigned int i;
+
+	syncAudioDeviceStates();
+
+	for (i = 0; i < audioOutputArraySize; ++i) {
+		if (audio_output_is_open(&audioOutputArray[i]))
+			audio_output_cancel(&audioOutputArray[i]);
+	}
+
+	audio_output_wait_all();
+}
+
+void closeAudioDevice(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < audioOutputArraySize; ++i)
+		audio_output_close(&audioOutputArray[i]);
+}
+
+void sendMetadataToAudioDevice(const struct tag *tag)
+{
+	unsigned int i;
+
+	for (i = 0; i < audioOutputArraySize; ++i)
+		if (audio_output_is_open(&audioOutputArray[i]))
+			audio_output_send_tag(&audioOutputArray[i], tag);
+
+	audio_output_wait_all();
+}
diff --git a/src/output_all.h b/src/output_all.h
new file mode 100644
index 000000000..15a1dce7d
--- /dev/null
+++ b/src/output_all.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ * Functions for dealing with all configured (enabled) audion outputs
+ * at once.
+ *
+ */
+
+#ifndef OUTPUT_ALL_H
+#define OUTPUT_ALL_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct audio_format;
+struct tag;
+
+/**
+ * Returns the total number of audio output devices, including those
+ * who are disabled right now.
+ */
+unsigned int audio_output_count(void);
+
+/**
+ * Returns the "i"th audio output device.
+ */
+struct audio_output *
+audio_output_get(unsigned i);
+
+/**
+ * Returns the audio output device with the specified name.  Returns
+ * NULL if the name does not exist.
+ */
+struct audio_output *
+audio_output_find(const char *name);
+
+void initAudioDriver(void);
+
+void finishAudioDriver(void);
+
+bool openAudioDevice(const struct audio_format *audioFormat);
+
+bool playAudio(const char *playChunk, size_t size);
+
+void audio_output_pause_all(void);
+
+void dropBufferedAudio(void);
+
+void closeAudioDevice(void);
+
+void sendMetadataToAudioDevice(const struct tag *tag);
+
+#endif
diff --git a/src/output_print.c b/src/output_print.c
index 6b2ab1b31..ac188639a 100644
--- a/src/output_print.c
+++ b/src/output_print.c
@@ -23,7 +23,7 @@
 
 #include "output_print.h"
 #include "output_internal.h"
-#include "audio.h"
+#include "output_all.h"
 #include "client.h"
 
 void
diff --git a/src/output_state.c b/src/output_state.c
index d0a2baeff..c28fc3915 100644
--- a/src/output_state.c
+++ b/src/output_state.c
@@ -23,7 +23,7 @@
 
 #include "output_state.h"
 #include "output_internal.h"
-#include "audio.h"
+#include "output_all.h"
 
 #include <glib.h>
 
diff --git a/src/player_thread.c b/src/player_thread.c
index 239fbab2d..a8f89197b 100644
--- a/src/player_thread.c
+++ b/src/player_thread.c
@@ -20,7 +20,7 @@
 #include "player_control.h"
 #include "decoder_control.h"
 #include "decoder_thread.h"
-#include "audio.h"
+#include "output_all.h"
 #include "pcm_volume.h"
 #include "path.h"
 #include "event_pipe.h"
diff --git a/src/volume.c b/src/volume.c
index 6f7c922c0..501791016 100644
--- a/src/volume.c
+++ b/src/volume.c
@@ -23,6 +23,7 @@
 #include "pcm_volume.h"
 #include "config.h"
 #include "audio.h"
+#include "output_all.h"
 
 #include <glib.h>