added support for the MMS protocol

This patch implements the MMS protocol, by using libmms.  It is quite
experimental: it does not support seeking yet, and it is currently
using synchronous I/O, which causes MPD to hang while waiting for the
server.

INSTALL

@@ -108,6 +108,9 @@ For advanced samplerate conversions.
 libcurl - http://curl.haxx.se/
 For playing HTTP streams.
 
+libmms - https://launchpad.net/libmms
+For playing MMS streams.
+
 
 pkg-config
 ----------

NEWS

@@ -1,6 +1,7 @@
 ver 0.15 - (200?/??/??)
 * input:
   - parse Icy-Metadata
+  - added support for the MMS protocol
 * tags:
   - support the "album artist" tag
   - support MusicBrainz tags

configure.ac

@@ -247,6 +247,18 @@ if test x$enable_curl = xyes; then
 fi
 AM_CONDITIONAL(HAVE_CURL, test x$enable_curl = xyes)
 
+AC_ARG_ENABLE(mms,
+	AS_HELP_STRING([--enable-mms],
+		[enable the MMS protocol with libmms (default: disable)]),,
+	[enable_mms=yes])
+
+if test x$enable_mms = xyes; then
+	PKG_CHECK_MODULES(MMS, [libmms],
+		AC_DEFINE(ENABLE_MMS, 1, [Define when libmms is used for the MMS protocol]),
+		AC_MSG_ERROR([libmms not found]))
+fi
+AM_CONDITIONAL(ENABLE_MMS, test x$enable_mms = xyes)
+
 
 dnl
 dnl archive plugins
@@ -1318,6 +1330,12 @@ else
 	echo " HTTP streaming (libcurl) ......disabled"
 fi
 
+if test x$enable_mms != xno; then
+	echo " MMS streaming (libmms) ........enabled"
+else
+	echo " MMS streaming (libmms) ........disabled"
+fi
+
 echo ""
 echo "##########################################"
 echo ""

src/Makefile.am

@@ -4,6 +4,7 @@ mpd_CFLAGS = $(MPD_CFLAGS)
 mpd_CPPFLAGS = \
 	$(SQLITE_CFLAGS) \
 	$(CURL_CFLAGS) \
+	$(MMS_CFLAGS) \
 	$(AO_CFLAGS) $(ALSA_CFLAGS) \
 	$(SHOUT_CFLAGS) \
 	$(OGGVORBIS_CFLAGS) $(VORBISENC_CFLAGS) \
@@ -17,6 +18,7 @@ mpd_CPPFLAGS = \
 mpd_LDADD = $(MPD_LIBS) \
 	$(SQLITE_LIBS) \
 	$(CURL_LIBS) \
+	$(MMS_LIBS) \
 	$(AO_LIBS) $(ALSA_LIBS) \
 	$(SHOUT_LIBS) \
 	$(OGGVORBIS_LIBS) $(VORBISENC_LIBS) $(FLAC_LIBS) \
@@ -64,6 +66,7 @@ mpd_headers = \
 	input_stream.h \
 	input_file.h \
 	input_curl.h \
+	input_mms.h \
 	icy_metadata.h \
 	client.h \
 	listen.h \
@@ -314,6 +317,10 @@ if HAVE_CURL
 mpd_SOURCES += input_curl.c icy_metadata.c
 endif
 
+if ENABLE_MMS
+mpd_SOURCES += input_mms.c
+endif
+
 
 if HAVE_ALSA
 mpd_SOURCES += output/alsa_plugin.c

src/input_mms.c

@@ -0,0 +1,120 @@
+/*
+ * 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 "input_mms.h"
+#include "input_stream.h"
+
+#include <glib.h>
+#include <libmms/mmsx.h>
+
+#include <string.h>
+#include <errno.h>
+
+struct input_mms {
+	mmsx_t *mms;
+
+	bool eof;
+};
+
+static bool
+input_mms_open(struct input_stream *is, const char *url)
+{
+	struct input_mms *m;
+
+	if (!g_str_has_prefix(url, "mms://") &&
+	    !g_str_has_prefix(url, "mmsh://") &&
+	    !g_str_has_prefix(url, "mmst://") &&
+	    !g_str_has_prefix(url, "mmsu://"))
+		return false;
+
+	m = g_new(struct input_mms, 1);
+	m->mms = mmsx_connect(NULL, NULL, url, 128 * 1024);
+	if (m->mms == NULL) {
+		g_warning("mmsx_connect() failed");
+		return false;
+	}
+
+	/* XX is this correct?  at least this selects the ffmpeg
+	   decoder, which seems to work fine*/
+	is->mime = g_strdup("audio/x-ms-wma");
+
+	is->data = m;
+	is->ready = true;
+	return true;
+}
+
+static size_t
+input_mms_read(struct input_stream *is, void *ptr, size_t size)
+{
+	struct input_mms *m = is->data;
+	int ret;
+
+	ret = mmsx_read(NULL, m->mms, ptr, size);
+	if (ret <= 0) {
+		if (ret < 0) {
+			is->error = errno;
+			g_warning("mmsx_read() failed: %s", g_strerror(errno));
+		}
+
+		m->eof = true;
+		return false;
+	}
+
+	is->offset += ret;
+
+	return (size_t)ret;
+}
+
+static void
+input_mms_close(struct input_stream *is)
+{
+	struct input_mms *m = is->data;
+
+	mmsx_close(m->mms);
+	g_free(m);
+}
+
+static bool
+input_mms_eof(struct input_stream *is)
+{
+	struct input_mms *m = is->data;
+
+	return m->eof;
+}
+
+static int
+input_mms_buffer(G_GNUC_UNUSED struct input_stream *is)
+{
+	return 0;
+}
+
+static bool
+input_mms_seek(G_GNUC_UNUSED struct input_stream *is,
+	       G_GNUC_UNUSED off_t offset, G_GNUC_UNUSED int whence)
+{
+	return false;
+}
+
+const struct input_plugin input_plugin_mms = {
+	.open = input_mms_open,
+	.close = input_mms_close,
+	.buffer = input_mms_buffer,
+	.read = input_mms_read,
+	.eof = input_mms_eof,
+	.seek = input_mms_seek,
+};

src/input_mms.h

@@ -0,0 +1,24 @@
+/*
+ * 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
+ */
+
+#ifndef INPUT_MMS_H
+#define INPUT_MMS_H
+
+extern const struct input_plugin input_plugin_mms;
+
+#endif

src/input_stream.c

@@ -29,6 +29,10 @@
 #include "input_curl.h"
 #endif
 
+#ifdef ENABLE_MMS
+#include "input_mms.h"
+#endif
+
 #include <glib.h>
 #include <assert.h>
 
@@ -40,6 +44,9 @@ static const struct input_plugin *const input_plugins[] = {
 #ifdef HAVE_CURL
 	&input_plugin_curl,
 #endif
+#ifdef ENABLE_MMS
+	&input_plugin_mms,
+#endif
 };
 
 static const unsigned num_input_plugins =

src/ls.c

@@ -26,6 +26,12 @@
 static const char *remoteUrlPrefixes[] = {
 #ifdef HAVE_CURL
 	"http://",
+#endif
+#ifdef ENABLE_MMS
+	"mms://",
+	"mmsh://",
+	"mmst://",
+	"mmsu://",
 #endif
 	NULL
 };