output/raop: new output plugin

Remote Audio Output Protocol (RAOP), for Apple devices.

Makefile.am

@@ -739,6 +739,11 @@ if HAVE_OSX
 OUTPUT_SRC += src/output/osx_plugin.c
 endif
 
+if ENABLE_RAOP_OUTPUT
+OUTPUT_SRC += src/output/raop_output_plugin.c
+MIXER_SRC += src/mixer/raop_mixer_plugin.c
+endif
+
 if HAVE_PULSE
 OUTPUT_SRC += src/output/pulse_output_plugin.c
 MIXER_SRC += src/mixer/pulse_mixer_plugin.c

NEWS

@@ -5,6 +5,7 @@ ver 0.17 (2010/??/??)
   - mpg123: implement seeking
 * output:
   - osx: allow user to specify other audio devices
+  - raop: new output plugin
 
 
 ver 0.16.1 (2010/01/09)

configure.ac

@@ -200,6 +200,11 @@ AC_ARG_ENABLE(httpd-output,
 		[enables the HTTP server output]),,
 	[enable_httpd_output=auto])
 
+AC_ARG_ENABLE(raop-output,
+	AS_HELP_STRING([--enable-httpd-output],
+		[enables the RAOP output]),,
+	[enable_raop_output=no])
+
 AC_ARG_ENABLE(id3,
 	AS_HELP_STRING([--disable-id3],
 		[disable id3 support (default: enable)]),,
@@ -1397,6 +1402,15 @@ esac
 
 AM_CONDITIONAL(ENABLE_SOLARIS_OUTPUT, test x$enable_solaris_output = xyes)
 
+dnl --------------------------------- RAOP ------------------------------------
+
+if test x$enable_raop_output = xyes; then
+        AC_DEFINE(ENABLE_RAOP_OUTPUT, 1, [Define for compiling RAOP support])
+        MPD_LIBS="$MPD_LIBS -lssl -lcrypto"
+fi
+
+AM_CONDITIONAL(ENABLE_RAOP_OUTPUT, test x$enable_raop_output = xyes)
+
 dnl --------------------------------- WinMM ---------------------------------
 
 case "$host_os" in
@@ -1425,6 +1439,7 @@ if
 	test x$enable_openal = xno &&
 	test x$enable_oss = xno &&
 	test x$enable_osx = xno &&
+	test x$enable_raop_output = xno &&
 	test x$enable_pipe_output = xno &&
 	test x$enable_pulse = xno &&
 	test x$enable_recorder_output = xno &&
@@ -1556,6 +1571,7 @@ results(ffado,FFADO)
 results(fifo,FIFO)
 results(recorder_output,[File Recorder])
 results(httpd_output,[HTTP Daemon])
+results(raop_output, [RAOP])
 results(jack,[JACK])
 results(ao,[libao])
 results(oss,[OSS])

src/mixer/raop_mixer_plugin.c

@@ -0,0 +1,78 @@
+/*
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "../output/raop_output_plugin.h"
+#include "../output_plugin.h"
+#include "../mixer_api.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+struct raop_mixer_plugin {
+	struct mixer base;
+	struct raop_data *rd;
+};
+
+static struct mixer *
+raop_mixer_init(void *ao, G_GNUC_UNUSED const struct config_param *param,
+		 G_GNUC_UNUSED GError **error_r)
+{
+	struct raop_mixer_plugin *rm = g_new(struct raop_mixer_plugin, 1);
+	rm->rd = (struct raop_data *) ao;
+	mixer_init(&rm->base, &raop_mixer_plugin);
+
+	return &rm->base;
+}
+
+static void
+raop_mixer_finish(struct mixer *data)
+{
+	struct raop_mixer_plugin *rm = (struct raop_mixer_plugin *) data;
+
+	g_free(rm);
+}
+
+static int
+raop_mixer_get_volume(struct mixer *mixer, G_GNUC_UNUSED GError **error_r)
+{
+	struct raop_mixer_plugin *rm = (struct raop_mixer_plugin *)mixer;
+	return raop_get_volume(rm->rd);
+}
+
+static bool
+raop_mixer_set_volume(struct mixer *mixer, unsigned volume, G_GNUC_UNUSED GError **error_r)
+{
+	struct raop_mixer_plugin *rm = (struct raop_mixer_plugin *)mixer;
+	g_debug("raop_mixer_set_volume\n");
+	return raop_set_volume(rm->rd, volume);
+}
+
+const struct mixer_plugin raop_mixer_plugin = {
+	.init = raop_mixer_init,
+	.finish = raop_mixer_finish,
+	.get_volume = raop_mixer_get_volume,
+	.set_volume = raop_mixer_set_volume,
+};

src/mixer_list.h

@@ -29,6 +29,7 @@ extern const struct mixer_plugin software_mixer_plugin;
 extern const struct mixer_plugin alsa_mixer_plugin;
 extern const struct mixer_plugin oss_mixer_plugin;
 extern const struct mixer_plugin pulse_mixer_plugin;
+extern const struct mixer_plugin raop_mixer_plugin;
 extern const struct mixer_plugin winmm_mixer_plugin;
 
 #endif

src/output/raop_output_plugin.h

@@ -0,0 +1,159 @@
+/*
+ * 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
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_OUTPUT_RAOP_PLUGIN_H
+#define MPD_OUTPUT_RAOP_PLUGIN_H
+
+#include <pthread.h>
+#include <stdbool.h>
+#include <netinet/in.h>
+#include <sys/time.h>
+#include <openssl/aes.h>
+
+struct key_data {
+	unsigned char *key;
+	unsigned char *data;
+	struct key_data *next;
+};
+
+struct play_state {
+	bool playing;
+	unsigned short seq_num;
+	unsigned int rtptime;
+	unsigned int sync_src;
+	unsigned int start_rtptime;
+	struct timeval start_time;
+	struct timeval last_send;
+};
+
+/*********************************************************************/
+
+struct rtspcl_data {
+	int fd;
+	char url[128];
+	int cseq;
+	struct key_data *kd;
+	struct key_data *exthds;
+	char *session;
+	char *transport;
+	unsigned short server_port;
+	unsigned short control_port;
+	struct in_addr host_addr;
+	struct in_addr local_addr;
+	const char *useragent;
+
+};
+
+enum pause_state {
+	NO_PAUSE = 0,
+	OP_PAUSE,
+	NODATA_PAUSE,
+};
+
+#define MINIMUM_SAMPLE_SIZE 32
+
+#define RAOP_FD_READ (1<<0)
+#define RAOP_FD_WRITE (1<<1)
+
+/*********************************************************************/
+
+struct encrypt_data {
+	AES_KEY ctx;
+	unsigned char iv[16]; // initialization vector for aes-cbc
+	unsigned char nv[16]; // next vector for aes-cbc
+	unsigned char key[16]; // key for aes-cbc
+};
+
+/*********************************************************************/
+
+struct ntp_data {
+	unsigned short port;
+	int fd;
+};
+
+/*********************************************************************/
+
+struct raop_data {
+	struct rtspcl_data *rtspcl;
+	const char *addr; // target host address
+	short rtsp_port;
+	struct sockaddr_in ctrl_addr;
+	struct sockaddr_in data_addr;
+
+	bool is_master;
+	struct raop_data *next;
+
+	unsigned volume;
+
+	pthread_mutex_t control_mutex;
+
+	bool started;
+	bool paused;
+};
+
+/*********************************************************************/
+
+struct control_data {
+	unsigned short port;
+	int fd;
+};
+
+bool
+send_control_command(struct control_data *ctrl, struct raop_data *rd, struct play_state *state);
+
+/*********************************************************************/
+
+#define NUMSAMPLES 352
+#define RAOP_BUFFER_SIZE NUMSAMPLES * 4
+#define RAOP_HEADER_SIZE 12
+#define ALAC_MAX_HEADER_SIZE 8
+#define RAOP_MAX_PACKET_SIZE RAOP_BUFFER_SIZE + RAOP_HEADER_SIZE + ALAC_MAX_HEADER_SIZE
+
+// session
+struct raop_session_data {
+	struct raop_data *raop_list;
+	struct ntp_data ntp;
+	struct control_data ctrl;
+	struct encrypt_data encrypt;
+	struct play_state play_state;
+
+	int data_fd;
+
+	unsigned char buffer[RAOP_BUFFER_SIZE];
+	size_t bufferSize;
+
+	unsigned char data[RAOP_MAX_PACKET_SIZE];
+	int wblk_wsize;
+	int wblk_remsize;
+
+	pthread_mutex_t data_mutex;
+	pthread_mutex_t list_mutex;
+};
+
+//static struct raop_session_data *raop_session;
+
+/*********************************************************************/
+
+bool
+raop_set_volume(struct raop_data *rd, unsigned volume);
+
+int
+raop_get_volume(struct raop_data *rd);
+
+#endif

src/output_list.c

@@ -30,6 +30,7 @@ extern const struct audio_output_plugin ao_output_plugin;
 extern const struct audio_output_plugin oss_output_plugin;
 extern const struct audio_output_plugin openal_output_plugin;
 extern const struct audio_output_plugin osxPlugin;
+extern const struct audio_output_plugin raopPlugin;
 extern const struct audio_output_plugin solaris_output_plugin;
 extern const struct audio_output_plugin pulse_output_plugin;
 extern const struct audio_output_plugin mvp_output_plugin;
@@ -65,6 +66,9 @@ const struct audio_output_plugin *audio_output_plugins[] = {
 #ifdef HAVE_OSX
 	&osxPlugin,
 #endif
+#ifdef ENABLE_RAOP_OUTPUT
+	&raopPlugin,
+#endif
 #ifdef ENABLE_SOLARIS_OUTPUT
 	&solaris_output_plugin,
 #endif