From f1f19841bdd291c055f59b6603f69278c66366d8 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Thu, 23 Jan 2014 23:30:12 +0100 Subject: playlist/*: move to playlist/plugins/ --- src/playlist/PlaylistRegistry.cxx | 335 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 335 insertions(+) create mode 100644 src/playlist/PlaylistRegistry.cxx (limited to 'src/playlist/PlaylistRegistry.cxx') diff --git a/src/playlist/PlaylistRegistry.cxx b/src/playlist/PlaylistRegistry.cxx new file mode 100644 index 000000000..94244f14c --- /dev/null +++ b/src/playlist/PlaylistRegistry.cxx @@ -0,0 +1,335 @@ +/* + * Copyright (C) 2003-2014 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 "config.h" +#include "PlaylistRegistry.hxx" +#include "PlaylistPlugin.hxx" +#include "plugins/ExtM3uPlaylistPlugin.hxx" +#include "plugins/M3uPlaylistPlugin.hxx" +#include "plugins/XspfPlaylistPlugin.hxx" +#include "plugins/DespotifyPlaylistPlugin.hxx" +#include "plugins/SoundCloudPlaylistPlugin.hxx" +#include "plugins/PlsPlaylistPlugin.hxx" +#include "plugins/AsxPlaylistPlugin.hxx" +#include "plugins/RssPlaylistPlugin.hxx" +#include "plugins/CuePlaylistPlugin.hxx" +#include "plugins/EmbeddedCuePlaylistPlugin.hxx" +#include "InputStream.hxx" +#include "util/UriUtil.hxx" +#include "util/StringUtil.hxx" +#include "util/Error.hxx" +#include "util/Macros.hxx" +#include "ConfigGlobal.hxx" +#include "ConfigData.hxx" +#include "system/FatalError.hxx" +#include "Log.hxx" + +#include +#include + +const struct playlist_plugin *const playlist_plugins[] = { + &extm3u_playlist_plugin, + &m3u_playlist_plugin, + &pls_playlist_plugin, +#ifdef HAVE_EXPAT + &xspf_playlist_plugin, + &asx_playlist_plugin, + &rss_playlist_plugin, +#endif +#ifdef ENABLE_DESPOTIFY + &despotify_playlist_plugin, +#endif +#ifdef ENABLE_SOUNDCLOUD + &soundcloud_playlist_plugin, +#endif + &cue_playlist_plugin, + &embcue_playlist_plugin, + nullptr +}; + +static constexpr unsigned n_playlist_plugins = + ARRAY_SIZE(playlist_plugins) - 1; + +/** which plugins have been initialized successfully? */ +static bool playlist_plugins_enabled[n_playlist_plugins]; + +#define playlist_plugins_for_each_enabled(plugin) \ + playlist_plugins_for_each(plugin) \ + if (playlist_plugins_enabled[playlist_plugin_iterator - playlist_plugins]) + +/** + * Find the "playlist" configuration block for the specified plugin. + * + * @param plugin_name the name of the playlist plugin + * @return the configuration block, or nullptr if none was configured + */ +static const struct config_param * +playlist_plugin_config(const char *plugin_name) +{ + const struct config_param *param = nullptr; + + assert(plugin_name != nullptr); + + while ((param = config_get_next_param(CONF_PLAYLIST_PLUGIN, param)) != nullptr) { + const char *name = param->GetBlockValue("name"); + if (name == nullptr) + FormatFatalError("playlist configuration without 'plugin' name in line %d", + param->line); + + if (strcmp(name, plugin_name) == 0) + return param; + } + + return nullptr; +} + +void +playlist_list_global_init(void) +{ + const config_param empty; + + for (unsigned i = 0; playlist_plugins[i] != nullptr; ++i) { + const struct playlist_plugin *plugin = playlist_plugins[i]; + const struct config_param *param = + playlist_plugin_config(plugin->name); + if (param == nullptr) + param = ∅ + else if (!param->GetBlockValue("enabled", true)) + /* the plugin is disabled in mpd.conf */ + continue; + + playlist_plugins_enabled[i] = + playlist_plugin_init(playlist_plugins[i], *param); + } +} + +void +playlist_list_global_finish(void) +{ + playlist_plugins_for_each_enabled(plugin) + playlist_plugin_finish(plugin); +} + +static SongEnumerator * +playlist_list_open_uri_scheme(const char *uri, Mutex &mutex, Cond &cond, + bool *tried) +{ + SongEnumerator *playlist = nullptr; + + assert(uri != nullptr); + + const auto scheme = uri_get_scheme(uri); + if (scheme.empty()) + return nullptr; + + for (unsigned i = 0; playlist_plugins[i] != nullptr; ++i) { + const struct playlist_plugin *plugin = playlist_plugins[i]; + + assert(!tried[i]); + + if (playlist_plugins_enabled[i] && plugin->open_uri != nullptr && + plugin->schemes != nullptr && + string_array_contains(plugin->schemes, scheme.c_str())) { + playlist = playlist_plugin_open_uri(plugin, uri, + mutex, cond); + if (playlist != nullptr) + break; + + tried[i] = true; + } + } + + return playlist; +} + +static SongEnumerator * +playlist_list_open_uri_suffix(const char *uri, Mutex &mutex, Cond &cond, + const bool *tried) +{ + const char *suffix; + SongEnumerator *playlist = nullptr; + + assert(uri != nullptr); + + suffix = uri_get_suffix(uri); + if (suffix == nullptr) + return nullptr; + + for (unsigned i = 0; playlist_plugins[i] != nullptr; ++i) { + const struct playlist_plugin *plugin = playlist_plugins[i]; + + if (playlist_plugins_enabled[i] && !tried[i] && + plugin->open_uri != nullptr && plugin->suffixes != nullptr && + string_array_contains(plugin->suffixes, suffix)) { + playlist = playlist_plugin_open_uri(plugin, uri, + mutex, cond); + if (playlist != nullptr) + break; + } + } + + return playlist; +} + +SongEnumerator * +playlist_list_open_uri(const char *uri, Mutex &mutex, Cond &cond) +{ + /** this array tracks which plugins have already been tried by + playlist_list_open_uri_scheme() */ + bool tried[n_playlist_plugins]; + + assert(uri != nullptr); + + memset(tried, false, sizeof(tried)); + + auto playlist = playlist_list_open_uri_scheme(uri, mutex, cond, tried); + if (playlist == nullptr) + playlist = playlist_list_open_uri_suffix(uri, mutex, cond, + tried); + + return playlist; +} + +static SongEnumerator * +playlist_list_open_stream_mime2(InputStream &is, const char *mime) +{ + assert(mime != nullptr); + + playlist_plugins_for_each_enabled(plugin) { + if (plugin->open_stream != nullptr && + plugin->mime_types != nullptr && + string_array_contains(plugin->mime_types, mime)) { + /* rewind the stream, so each plugin gets a + fresh start */ + is.Rewind(IgnoreError()); + + auto playlist = playlist_plugin_open_stream(plugin, + is); + if (playlist != nullptr) + return playlist; + } + } + + return nullptr; +} + +static SongEnumerator * +playlist_list_open_stream_mime(InputStream &is, const char *full_mime) +{ + assert(full_mime != nullptr); + + const char *semicolon = strchr(full_mime, ';'); + if (semicolon == nullptr) + return playlist_list_open_stream_mime2(is, full_mime); + + if (semicolon == full_mime) + return nullptr; + + /* probe only the portion before the semicolon*/ + const std::string mime(full_mime, semicolon); + return playlist_list_open_stream_mime2(is, mime.c_str()); +} + +static SongEnumerator * +playlist_list_open_stream_suffix(InputStream &is, const char *suffix) +{ + assert(suffix != nullptr); + + playlist_plugins_for_each_enabled(plugin) { + if (plugin->open_stream != nullptr && + plugin->suffixes != nullptr && + string_array_contains(plugin->suffixes, suffix)) { + /* rewind the stream, so each plugin gets a + fresh start */ + is.Rewind(IgnoreError()); + + auto playlist = playlist_plugin_open_stream(plugin, is); + if (playlist != nullptr) + return playlist; + } + } + + return nullptr; +} + +SongEnumerator * +playlist_list_open_stream(InputStream &is, const char *uri) +{ + assert(is.ready); + + const char *const mime = is.GetMimeType(); + if (mime != nullptr) { + auto playlist = playlist_list_open_stream_mime(is, mime); + if (playlist != nullptr) + return playlist; + } + + const char *suffix = uri != nullptr ? uri_get_suffix(uri) : nullptr; + if (suffix != nullptr) { + auto playlist = playlist_list_open_stream_suffix(is, suffix); + if (playlist != nullptr) + return playlist; + } + + return nullptr; +} + +bool +playlist_suffix_supported(const char *suffix) +{ + assert(suffix != nullptr); + + playlist_plugins_for_each_enabled(plugin) { + if (plugin->suffixes != nullptr && + string_array_contains(plugin->suffixes, suffix)) + return true; + } + + return false; +} + +SongEnumerator * +playlist_list_open_path(const char *path_fs, Mutex &mutex, Cond &cond, + InputStream **is_r) +{ + const char *suffix; + + assert(path_fs != nullptr); + + suffix = uri_get_suffix(path_fs); + if (suffix == nullptr || !playlist_suffix_supported(suffix)) + return nullptr; + + Error error; + InputStream *is = InputStream::OpenReady(path_fs, mutex, cond, error); + if (is == nullptr) { + if (error.IsDefined()) + LogError(error); + + return nullptr; + } + + auto playlist = playlist_list_open_stream_suffix(*is, suffix); + if (playlist != nullptr) + *is_r = is; + else + is->Close(); + + return playlist; +} -- cgit v1.2.3