From 97391fd4b975eab7049c31c88b8a118be430c427 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Fri, 24 Jan 2014 16:26:42 +0100 Subject: DespotifyUtils, Expat: move to lib/ --- src/lib/despotify/DespotifyUtils.cxx | 153 +++++++++++++++++++++++++++++++++++ src/lib/despotify/DespotifyUtils.hxx | 71 ++++++++++++++++ src/lib/expat/ExpatParser.cxx | 92 +++++++++++++++++++++ src/lib/expat/ExpatParser.hxx | 129 +++++++++++++++++++++++++++++ 4 files changed, 445 insertions(+) create mode 100644 src/lib/despotify/DespotifyUtils.cxx create mode 100644 src/lib/despotify/DespotifyUtils.hxx create mode 100644 src/lib/expat/ExpatParser.cxx create mode 100644 src/lib/expat/ExpatParser.hxx (limited to 'src/lib') diff --git a/src/lib/despotify/DespotifyUtils.cxx b/src/lib/despotify/DespotifyUtils.cxx new file mode 100644 index 000000000..47a83e49b --- /dev/null +++ b/src/lib/despotify/DespotifyUtils.cxx @@ -0,0 +1,153 @@ +/* + * 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 "DespotifyUtils.hxx" +#include "tag/Tag.hxx" +#include "tag/TagBuilder.hxx" +#include "config/ConfigGlobal.hxx" +#include "config/ConfigOption.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +extern "C" { +#include +} + +#include + +const Domain despotify_domain("despotify"); + +static struct despotify_session *g_session; +static void (*registered_callbacks[8])(struct despotify_session *, + int, void *, void *); +static void *registered_callback_data[8]; + +static void +callback(struct despotify_session* ds, int sig, + void *data, gcc_unused void *callback_data) +{ + size_t i; + + for (i = 0; i < sizeof(registered_callbacks) / sizeof(registered_callbacks[0]); i++) { + void (*cb)(struct despotify_session *, int, void *, void *) = registered_callbacks[i]; + void *cb_data = registered_callback_data[i]; + + if (cb) + cb(ds, sig, data, cb_data); + } +} + +bool mpd_despotify_register_callback(void (*cb)(struct despotify_session *, int, void *, void *), + void *cb_data) +{ + size_t i; + + for (i = 0; i < sizeof(registered_callbacks) / sizeof(registered_callbacks[0]); i++) { + + if (!registered_callbacks[i]) { + registered_callbacks[i] = cb; + registered_callback_data[i] = cb_data; + + return true; + } + } + + return false; +} + +void mpd_despotify_unregister_callback(void (*cb)(struct despotify_session *, int, void *, void *)) +{ + size_t i; + + for (i = 0; i < sizeof(registered_callbacks) / sizeof(registered_callbacks[0]); i++) { + + if (registered_callbacks[i] == cb) { + registered_callbacks[i] = nullptr; + } + } +} + +Tag +mpd_despotify_tag_from_track(const ds_track &track) +{ + char tracknum[20]; + char comment[80]; + char date[20]; + + if (!track.has_meta_data) + return Tag(); + + TagBuilder tag; + snprintf(tracknum, sizeof(tracknum), "%d", track.tracknumber); + snprintf(date, sizeof(date), "%d", track.year); + snprintf(comment, sizeof(comment), "Bitrate %d Kbps, %sgeo restricted", + track.file_bitrate / 1000, + track.geo_restricted ? "" : "not "); + tag.AddItem(TAG_TITLE, track.title); + tag.AddItem(TAG_ARTIST, track.artist->name); + tag.AddItem(TAG_TRACK, tracknum); + tag.AddItem(TAG_ALBUM, track.album); + tag.AddItem(TAG_DATE, date); + tag.AddItem(TAG_COMMENT, comment); + tag.SetTime(track.length / 1000); + + return tag.Commit(); +} + +struct despotify_session *mpd_despotify_get_session(void) +{ + const char *user; + const char *passwd; + bool high_bitrate; + + if (g_session) + return g_session; + + user = config_get_string(CONF_DESPOTIFY_USER, nullptr); + passwd = config_get_string(CONF_DESPOTIFY_PASSWORD, nullptr); + high_bitrate = config_get_bool(CONF_DESPOTIFY_HIGH_BITRATE, true); + + if (user == nullptr || passwd == nullptr) { + LogDebug(despotify_domain, + "disabling despotify because account is not configured"); + return nullptr; + } + + if (!despotify_init()) { + LogWarning(despotify_domain, "Can't initialize despotify"); + return nullptr; + } + + g_session = despotify_init_client(callback, nullptr, + high_bitrate, true); + if (!g_session) { + LogWarning(despotify_domain, + "Can't initialize despotify client"); + return nullptr; + } + + if (!despotify_authenticate(g_session, user, passwd)) { + LogWarning(despotify_domain, + "Can't authenticate despotify session"); + despotify_exit(g_session); + return nullptr; + } + + return g_session; +} diff --git a/src/lib/despotify/DespotifyUtils.hxx b/src/lib/despotify/DespotifyUtils.hxx new file mode 100644 index 000000000..835b901a2 --- /dev/null +++ b/src/lib/despotify/DespotifyUtils.hxx @@ -0,0 +1,71 @@ +/* + * 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. + */ + +#ifndef MPD_DESPOTIFY_H +#define MPD_DESPOTIFY_H + +struct Tag; +struct despotify_session; +struct ds_track; + +extern const class Domain despotify_domain; + +/** + * Return the current despotify session. + * + * If the session isn't initialized, this function will initialize + * it and connect to Spotify. + * + * @return a pointer to the despotify session, or nullptr if it can't + * be initialized (e.g., if the configuration isn't supplied) + */ +struct despotify_session *mpd_despotify_get_session(void); + +/** + * Create a MPD tags structure from a spotify track + * + * @param track the track to convert + * + * @return filled in #Tag structure + */ +Tag +mpd_despotify_tag_from_track(const ds_track &track); + +/** + * Register a despotify callback. + * + * Despotify calls this e.g., when a track ends. + * + * @param cb the callback + * @param cb_data the data to pass to the callback + * + * @return true if the callback could be registered + */ +bool mpd_despotify_register_callback(void (*cb)(struct despotify_session *, int, void *, void *), + void *cb_data); + +/** + * Unregister a despotify callback. + * + * @param cb the callback to unregister. + */ +void mpd_despotify_unregister_callback(void (*cb)(struct despotify_session *, int, void *, void *)); + +#endif + diff --git a/src/lib/expat/ExpatParser.cxx b/src/lib/expat/ExpatParser.cxx new file mode 100644 index 000000000..b69dc55b4 --- /dev/null +++ b/src/lib/expat/ExpatParser.cxx @@ -0,0 +1,92 @@ +/* + * 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 "ExpatParser.hxx" +#include "input/InputStream.hxx" +#include "util/ASCII.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" + +#include + +static constexpr Domain expat_domain("expat"); + +void +ExpatParser::SetError(Error &error) +{ + XML_Error code = XML_GetErrorCode(parser); + error.Format(expat_domain, int(code), "XML parser failed: %s", + XML_ErrorString(code)); +} + +bool +ExpatParser::Parse(const char *data, size_t length, bool is_final, + Error &error) +{ + bool success = XML_Parse(parser, data, length, + is_final) == XML_STATUS_OK; + if (!success) + SetError(error); + + return success; +} + +bool +ExpatParser::Parse(InputStream &is, Error &error) +{ + assert(is.ready); + + while (true) { + char buffer[4096]; + size_t nbytes = is.LockRead(buffer, sizeof(buffer), error); + if (nbytes == 0) + break; + + if (!Parse(buffer, nbytes, false, error)) + return false; + } + + if (error.IsDefined()) + return false; + + return Parse("", 0, true, error); +} + +const char * +ExpatParser::GetAttribute(const XML_Char **atts, + const char *name) +{ + for (unsigned i = 0; atts[i] != nullptr; i += 2) + if (strcmp(atts[i], name) == 0) + return atts[i + 1]; + + return nullptr; +} + +const char * +ExpatParser::GetAttributeCase(const XML_Char **atts, + const char *name) +{ + for (unsigned i = 0; atts[i] != nullptr; i += 2) + if (StringEqualsCaseASCII(atts[i], name)) + return atts[i + 1]; + + return nullptr; +} diff --git a/src/lib/expat/ExpatParser.hxx b/src/lib/expat/ExpatParser.hxx new file mode 100644 index 000000000..d57a85533 --- /dev/null +++ b/src/lib/expat/ExpatParser.hxx @@ -0,0 +1,129 @@ +/* + * 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. + */ + +#ifndef MPD_EXPAT_HXX +#define MPD_EXPAT_HXX + +#include "check.h" +#include "Compiler.h" + +#include + +struct InputStream; +class Error; + +class ExpatParser final { + const XML_Parser parser; + +public: + ExpatParser(void *userData) + :parser(XML_ParserCreate(nullptr)) { + XML_SetUserData(parser, userData); + } + + ~ExpatParser() { + XML_ParserFree(parser); + } + + void SetElementHandler(XML_StartElementHandler start, + XML_EndElementHandler end) { + XML_SetElementHandler(parser, start, end); + } + + void SetCharacterDataHandler(XML_CharacterDataHandler charhndl) { + XML_SetCharacterDataHandler(parser, charhndl); + } + + bool Parse(const char *data, size_t length, bool is_final, + Error &error); + + bool Parse(InputStream &is, Error &error); + + gcc_pure + static const char *GetAttribute(const XML_Char **atts, + const char *name); + + gcc_pure + static const char *GetAttributeCase(const XML_Char **atts, + const char *name); + +private: + void SetError(Error &error); +}; + +/** + * A specialization of #ExpatParser that provides the most common + * callbacks as virtual methods. + */ +class CommonExpatParser { + ExpatParser parser; + +public: + CommonExpatParser():parser(this) { + parser.SetElementHandler(StartElement, EndElement); + parser.SetCharacterDataHandler(CharacterData); + } + + bool Parse(const char *data, size_t length, bool is_final, + Error &error) { + return parser.Parse(data, length, is_final, error); + } + + bool Parse(InputStream &is, Error &error) { + return parser.Parse(is, error); + } + + gcc_pure + static const char *GetAttribute(const XML_Char **atts, + const char *name) { + return ExpatParser::GetAttribute(atts, name); + } + + gcc_pure + static const char *GetAttributeCase(const XML_Char **atts, + const char *name) { + return ExpatParser::GetAttributeCase(atts, name); + } + +protected: + virtual void StartElement(const XML_Char *name, + const XML_Char **atts) = 0; + virtual void EndElement(const XML_Char *name) = 0; + virtual void CharacterData(const XML_Char *s, int len) = 0; + +private: + static void XMLCALL StartElement(void *user_data, const XML_Char *name, + const XML_Char **atts) { + CommonExpatParser &p = *(CommonExpatParser *)user_data; + p.StartElement(name, atts); + } + + static void XMLCALL EndElement(void *user_data, const XML_Char *name) { + CommonExpatParser &p = *(CommonExpatParser *)user_data; + p.EndElement(name); + } + + static void XMLCALL CharacterData(void *user_data, + const XML_Char *s, int len) { + CommonExpatParser &p = *(CommonExpatParser *)user_data; + p.CharacterData(s, len); + } +}; + +#endif -- cgit v1.2.3