playlist/*: move to playlist/plugins/
This commit is contained in:
Max Kellermann
335
src/playlist/PlaylistRegistry.cxx
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335
src/playlist/PlaylistRegistry.cxx
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/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "PlaylistRegistry.hxx"
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#include "PlaylistPlugin.hxx"
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#include "plugins/ExtM3uPlaylistPlugin.hxx"
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#include "plugins/M3uPlaylistPlugin.hxx"
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#include "plugins/XspfPlaylistPlugin.hxx"
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#include "plugins/DespotifyPlaylistPlugin.hxx"
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#include "plugins/SoundCloudPlaylistPlugin.hxx"
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#include "plugins/PlsPlaylistPlugin.hxx"
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#include "plugins/AsxPlaylistPlugin.hxx"
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#include "plugins/RssPlaylistPlugin.hxx"
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#include "plugins/CuePlaylistPlugin.hxx"
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#include "plugins/EmbeddedCuePlaylistPlugin.hxx"
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#include "InputStream.hxx"
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#include "util/UriUtil.hxx"
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#include "util/StringUtil.hxx"
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#include "util/Error.hxx"
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#include "util/Macros.hxx"
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#include "ConfigGlobal.hxx"
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#include "ConfigData.hxx"
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#include "system/FatalError.hxx"
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#include "Log.hxx"
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#include <assert.h>
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#include <string.h>
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const struct playlist_plugin *const playlist_plugins[] = {
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&extm3u_playlist_plugin,
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&m3u_playlist_plugin,
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&pls_playlist_plugin,
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#ifdef HAVE_EXPAT
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&xspf_playlist_plugin,
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&asx_playlist_plugin,
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&rss_playlist_plugin,
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#endif
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#ifdef ENABLE_DESPOTIFY
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&despotify_playlist_plugin,
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#endif
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#ifdef ENABLE_SOUNDCLOUD
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&soundcloud_playlist_plugin,
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#endif
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&cue_playlist_plugin,
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&embcue_playlist_plugin,
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nullptr
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};
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static constexpr unsigned n_playlist_plugins =
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ARRAY_SIZE(playlist_plugins) - 1;
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/** which plugins have been initialized successfully? */
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static bool playlist_plugins_enabled[n_playlist_plugins];
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#define playlist_plugins_for_each_enabled(plugin) \
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playlist_plugins_for_each(plugin) \
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if (playlist_plugins_enabled[playlist_plugin_iterator - playlist_plugins])
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/**
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* Find the "playlist" configuration block for the specified plugin.
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*
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* @param plugin_name the name of the playlist plugin
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* @return the configuration block, or nullptr if none was configured
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*/
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static const struct config_param *
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playlist_plugin_config(const char *plugin_name)
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{
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const struct config_param *param = nullptr;
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assert(plugin_name != nullptr);
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while ((param = config_get_next_param(CONF_PLAYLIST_PLUGIN, param)) != nullptr) {
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const char *name = param->GetBlockValue("name");
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if (name == nullptr)
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FormatFatalError("playlist configuration without 'plugin' name in line %d",
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param->line);
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if (strcmp(name, plugin_name) == 0)
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return param;
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}
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return nullptr;
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}
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void
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playlist_list_global_init(void)
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{
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const config_param empty;
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for (unsigned i = 0; playlist_plugins[i] != nullptr; ++i) {
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const struct playlist_plugin *plugin = playlist_plugins[i];
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const struct config_param *param =
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playlist_plugin_config(plugin->name);
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if (param == nullptr)
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param = ∅
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else if (!param->GetBlockValue("enabled", true))
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/* the plugin is disabled in mpd.conf */
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continue;
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playlist_plugins_enabled[i] =
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playlist_plugin_init(playlist_plugins[i], *param);
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}
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}
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void
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playlist_list_global_finish(void)
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{
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playlist_plugins_for_each_enabled(plugin)
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playlist_plugin_finish(plugin);
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}
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static SongEnumerator *
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playlist_list_open_uri_scheme(const char *uri, Mutex &mutex, Cond &cond,
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bool *tried)
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{
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SongEnumerator *playlist = nullptr;
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assert(uri != nullptr);
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const auto scheme = uri_get_scheme(uri);
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if (scheme.empty())
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return nullptr;
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for (unsigned i = 0; playlist_plugins[i] != nullptr; ++i) {
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const struct playlist_plugin *plugin = playlist_plugins[i];
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assert(!tried[i]);
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if (playlist_plugins_enabled[i] && plugin->open_uri != nullptr &&
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plugin->schemes != nullptr &&
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string_array_contains(plugin->schemes, scheme.c_str())) {
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playlist = playlist_plugin_open_uri(plugin, uri,
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mutex, cond);
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if (playlist != nullptr)
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break;
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tried[i] = true;
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}
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}
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return playlist;
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}
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static SongEnumerator *
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playlist_list_open_uri_suffix(const char *uri, Mutex &mutex, Cond &cond,
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const bool *tried)
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{
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const char *suffix;
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SongEnumerator *playlist = nullptr;
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assert(uri != nullptr);
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suffix = uri_get_suffix(uri);
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if (suffix == nullptr)
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return nullptr;
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for (unsigned i = 0; playlist_plugins[i] != nullptr; ++i) {
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const struct playlist_plugin *plugin = playlist_plugins[i];
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if (playlist_plugins_enabled[i] && !tried[i] &&
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plugin->open_uri != nullptr && plugin->suffixes != nullptr &&
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string_array_contains(plugin->suffixes, suffix)) {
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playlist = playlist_plugin_open_uri(plugin, uri,
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mutex, cond);
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if (playlist != nullptr)
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break;
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}
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}
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return playlist;
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}
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SongEnumerator *
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playlist_list_open_uri(const char *uri, Mutex &mutex, Cond &cond)
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{
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/** this array tracks which plugins have already been tried by
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playlist_list_open_uri_scheme() */
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bool tried[n_playlist_plugins];
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assert(uri != nullptr);
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memset(tried, false, sizeof(tried));
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auto playlist = playlist_list_open_uri_scheme(uri, mutex, cond, tried);
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if (playlist == nullptr)
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playlist = playlist_list_open_uri_suffix(uri, mutex, cond,
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tried);
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return playlist;
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}
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static SongEnumerator *
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playlist_list_open_stream_mime2(InputStream &is, const char *mime)
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{
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assert(mime != nullptr);
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playlist_plugins_for_each_enabled(plugin) {
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if (plugin->open_stream != nullptr &&
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plugin->mime_types != nullptr &&
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string_array_contains(plugin->mime_types, mime)) {
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/* rewind the stream, so each plugin gets a
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fresh start */
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is.Rewind(IgnoreError());
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auto playlist = playlist_plugin_open_stream(plugin,
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is);
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if (playlist != nullptr)
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return playlist;
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}
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}
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return nullptr;
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}
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static SongEnumerator *
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playlist_list_open_stream_mime(InputStream &is, const char *full_mime)
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{
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assert(full_mime != nullptr);
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const char *semicolon = strchr(full_mime, ';');
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if (semicolon == nullptr)
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return playlist_list_open_stream_mime2(is, full_mime);
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if (semicolon == full_mime)
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return nullptr;
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/* probe only the portion before the semicolon*/
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const std::string mime(full_mime, semicolon);
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return playlist_list_open_stream_mime2(is, mime.c_str());
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}
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static SongEnumerator *
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playlist_list_open_stream_suffix(InputStream &is, const char *suffix)
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{
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assert(suffix != nullptr);
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playlist_plugins_for_each_enabled(plugin) {
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if (plugin->open_stream != nullptr &&
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plugin->suffixes != nullptr &&
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string_array_contains(plugin->suffixes, suffix)) {
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/* rewind the stream, so each plugin gets a
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fresh start */
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is.Rewind(IgnoreError());
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auto playlist = playlist_plugin_open_stream(plugin, is);
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if (playlist != nullptr)
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return playlist;
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}
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}
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return nullptr;
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}
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SongEnumerator *
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playlist_list_open_stream(InputStream &is, const char *uri)
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{
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assert(is.ready);
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const char *const mime = is.GetMimeType();
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if (mime != nullptr) {
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auto playlist = playlist_list_open_stream_mime(is, mime);
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if (playlist != nullptr)
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return playlist;
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}
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const char *suffix = uri != nullptr ? uri_get_suffix(uri) : nullptr;
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if (suffix != nullptr) {
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auto playlist = playlist_list_open_stream_suffix(is, suffix);
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if (playlist != nullptr)
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return playlist;
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}
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return nullptr;
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}
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bool
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playlist_suffix_supported(const char *suffix)
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{
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assert(suffix != nullptr);
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playlist_plugins_for_each_enabled(plugin) {
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if (plugin->suffixes != nullptr &&
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string_array_contains(plugin->suffixes, suffix))
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return true;
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}
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return false;
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}
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SongEnumerator *
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playlist_list_open_path(const char *path_fs, Mutex &mutex, Cond &cond,
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InputStream **is_r)
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{
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const char *suffix;
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assert(path_fs != nullptr);
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suffix = uri_get_suffix(path_fs);
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if (suffix == nullptr || !playlist_suffix_supported(suffix))
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return nullptr;
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Error error;
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InputStream *is = InputStream::OpenReady(path_fs, mutex, cond, error);
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if (is == nullptr) {
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if (error.IsDefined())
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LogError(error);
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return nullptr;
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}
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auto playlist = playlist_list_open_stream_suffix(*is, suffix);
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if (playlist != nullptr)
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*is_r = is;
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else
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is->Close();
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return playlist;
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}
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