device-manager: Add an untested protocol extension.

This is effectively copied from the stream restore extension.

src/pulse/ext-device-manager.h

@@ -0,0 +1,106 @@
+#ifndef foopulseextdevicemanagerhfoo
+#define foopulseextdevicemanagerhfoo
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2008 Lennart Poettering
+  Copyright 2009 Colin Guthrie
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <pulse/context.h>
+#include <pulse/version.h>
+
+/** \file
+ *
+ * Routines for controlling module-stream-restore
+ */
+
+PA_C_DECL_BEGIN
+
+/** Stores information about one device in the device database that is
+ * maintained by module-device-manager. \since 0.9.17 */
+typedef struct pa_ext_device_manager_info {
+    const char *name;            /**< Identifier string of the device. A string like "sink:" or similar followed by the name of the device. */
+    const char *description;     /**< The description of the device when it was last seen, if applicable and saved */
+} pa_ext_device_manager_info;
+
+/** Callback prototype for pa_ext_device_manager_test(). \since 0.9.17 */
+typedef void (*pa_ext_device_manager_test_cb_t)(
+        pa_context *c,
+        uint32_t version,
+        void *userdata);
+
+/** Test if this extension module is available in the server. \since 0.9.17 */
+pa_operation *pa_ext_device_manager_test(
+        pa_context *c,
+        pa_ext_device_manager_test_cb_t cb,
+        void *userdata);
+
+/** Callback prototype for pa_ext_device_manager_read(). \since 0.9.17 */
+typedef void (*pa_ext_device_manager_read_cb_t)(
+        pa_context *c,
+        const pa_ext_device_manager_info *info,
+        int eol,
+        void *userdata);
+
+/** Read all entries from the device database. \since 0.9.17 */
+pa_operation *pa_ext_device_manager_read(
+        pa_context *c,
+        pa_ext_device_manager_read_cb_t cb,
+        void *userdata);
+
+/** Store entries in the device database. \since 0.9.17 */
+pa_operation *pa_ext_device_manager_write(
+        pa_context *c,
+        pa_update_mode_t mode,
+        const pa_ext_device_manager_info data[],
+        unsigned n,
+        int apply_immediately,
+        pa_context_success_cb_t cb,
+        void *userdata);
+
+/** Delete entries from the device database. \since 0.9.17 */
+pa_operation *pa_ext_device_manager_delete(
+        pa_context *c,
+        const char *const s[],
+        pa_context_success_cb_t cb,
+        void *userdata);
+
+/** Subscribe to changes in the device database. \since 0.9.17 */
+pa_operation *pa_ext_device_manager_subscribe(
+        pa_context *c,
+        int enable,
+        pa_context_success_cb_t cb,
+        void *userdata);
+
+/** Callback prototype for pa_ext_device_manager_set_subscribe_cb(). \since 0.9.17 */
+typedef void (*pa_ext_device_manager_subscribe_cb_t)(
+        pa_context *c,
+        void *userdata);
+
+/** Set the subscription callback that is called when
+ * pa_ext_device_manager_subscribe() was called. \since 0.9.17 */
+void pa_ext_device_manager_set_subscribe_cb(
+        pa_context *c,
+        pa_ext_device_manager_subscribe_cb_t cb,
+        void *userdata);
+
+PA_C_DECL_END
+
+#endif