Index installed sounds and implement ARI sounds queries

This adds support for stasis/sounds and stasis/sounds/{ID} queries via
the Asterisk RESTful Interface (ARI, formerly Stasis-HTTP).

The following changes have been made to accomplish this:
* A modular indexer was created for local media.
* A new function to get an ast_format associated with a file extension
  was added.  
* Modifications were made to the built-in HTTP server so that URI
  decoding could be deferred to the URI handler when necessary.
* The Stasis-HTTP sounds JSON documentation was modified to handle
  cases where multiple languages are installed in different formats.
* Register and Unregister events for formats were added to the system
  topic.

(closes issue ASTERISK-21584)
(closes issue ASTERISK-21585)
Review: https://reviewboard.asterisk.org/r/2507/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@392700 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 108 insertions, 0 deletions

diff --git a/include/asterisk/media_index.h b/include/asterisk/media_index.h
new file mode 100644
index 000000000..40fb72102
--- /dev/null
+++ b/include/asterisk/media_index.h
@@ -0,0 +1,108 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013, Digium, Inc.
+ *
+ * Kinsey Moore <kmoore@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ * \brief Media file format and description indexing engine.
+ */
+
+#ifndef _ASTERISK_MEDIA_INDEX_H
+#define _ASTERISK_MEDIA_INDEX_H
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+struct ast_format_cap;
+
+/*!
+ * \brief Object representing a media index
+ */
+struct ast_media_index;
+
+/*!
+ * \brief Creates a new media index
+ *
+ * \param base_dir Base directory for indexing
+ *
+ * \retval NULL on error
+ * \retval A new AO2 refcounted media index
+ */
+struct ast_media_index *ast_media_index_create(
+	const char *base_dir);
+
+/*!
+ * \brief Get the description for a media file
+ *
+ * \param index Media index in which to query information
+ * \param filename Name of the file for which to get the description
+ * \param variant Media variant for which to get the description
+ *
+ * \retval NULL if not found
+ * \return The description requested (must be copied to be kept)
+ */
+const char *ast_media_get_description(struct ast_media_index *index, const char *filename, const char *variant);
+
+/*!
+ * \brief Get the ast_format_cap for a media file
+ *
+ * \param index Media index in which to query information
+ * \param filename Name of the file for which to get the description
+ * \param variant Media variant for which to get the description
+ *
+ * \retval NULL if not found
+ * \return a copy of the format capabilities (must be destroyed with ast_format_cap_destroy)
+ */
+struct ast_format_cap *ast_media_get_format_cap(struct ast_media_index *index, const char *filename, const char *variant);
+
+/*!
+ * \brief Get the languages in which a media file is available
+ *
+ * \param index Media index in which to query information
+ * \param filename Name of the file for which to get available languages
+ *
+ * \retval NULL on error
+ * \return an ast_str_container filled with language strings
+ */
+struct ao2_container *ast_media_get_variants(struct ast_media_index *index, const char *filename);
+
+/*!
+ * \brief Get the a container of all media available on the system
+ *
+ * \param index Media index in which to query information
+ *
+ * \retval NULL on error
+ * \return an ast_str_container filled with media file name strings
+ */
+struct ao2_container *ast_media_get_media(struct ast_media_index *index);
+
+/*!
+ * \brief Update a media index
+ *
+ * \param index Media index in which to query information
+ * \param variant Media variant for which to get the description
+ *
+ * \retval non-zero on error
+ * \return zero on success
+ */
+int ast_media_index_update(struct ast_media_index *index,
+	const char *variant);
+#if defined(__cplusplus) || defined(c_plusplus)
+}
+#endif
+
+#endif /* _ASTERISK_MEDIA_INDEX_H */