release v0.21.23

libnfs is compiled with `-D_FILE_OFFSET_BITS=64`, but Meson decides
not to enable this mode.  We could force this mode, but then again,
these days, nobody should be using 32-bit Windows ... so this is a
kludge only for debugging with 32-bit WINE.

NEWS

@@ -1,3 +1,21 @@
+ver 0.21.23 (2020/04/23)
+* protocol
+  - add tag fallback for AlbumSort
+* storage
+  - curl: fix corrupt "href" values in the presence of XML entities
+  - curl: unescape "href" values
+* input
+  - nfs: fix crash bug
+  - nfs: fix freeze bug on reconnect
+* decoder
+  - gme: adapt to API change in the upcoming version 0.7.0
+* output
+  - alsa: implement channel mapping for 5.0 and 7.0
+* player
+  - drain outputs at end of song in "single" mode
+* Windows
+  - fix case insensitive search
+
 ver 0.21.22 (2020/04/02)
 * database
   - simple: optimize startup

android/AndroidManifest.xml

@@ -2,8 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="org.musicpd"
           android:installLocation="auto"
-          android:versionCode="45"
-          android:versionName="0.21.22">
+          android:versionCode="46"
+          android:versionName="0.21.23">
 
   <uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28"/>
 

doc/conf.py

@@ -38,7 +38,7 @@ author = 'Max Kellermann'
 # built documents.
 #
 # The short X.Y version.
-version = '0.21.22'
+version = '0.21.23'
 # The full version, including alpha/beta/rc tags.
 release = version
 

meson.build

@@ -1,7 +1,7 @@
 project(
   'mpd',
   ['c', 'cpp'],
-  version: '0.21.22',
+  version: '0.21.23',
   meson_version: '>= 0.49.0',
   default_options: [
     'c_std=c99',

src/decoder/plugins/GmeDecoderPlugin.cxx

@@ -185,7 +185,11 @@ gme_file_decode(DecoderClient &client, Path path_fs)
 		LogWarning(gme_domain, gme_err);
 
 	if (length > 0)
-		gme_set_fade(emu, length);
+		gme_set_fade(emu, length
+#if GME_VERSION >= 0x000700
+			     , 8000
+#endif
+			     );
 
 	/* play */
 	DecoderCommand cmd;

src/event/PollGroupWinSelect.cxx

@@ -23,8 +23,8 @@
 
 #include "PollGroupWinSelect.hxx"
 
-constexpr int EVENT_READ = 0;
-constexpr int EVENT_WRITE = 1;
+static constexpr int EVENT_READ = 0;
+static constexpr int EVENT_WRITE = 1;
 
 static constexpr
 bool HasEvent(unsigned events, int event_id) noexcept

src/event/SocketMonitor.cxx

@@ -20,6 +20,10 @@
 #include "SocketMonitor.hxx"
 #include "Loop.hxx"
 
+#ifdef USE_EPOLL
+#include <cerrno>
+#endif
+
 #include <assert.h>
 
 #ifdef _WIN32
@@ -86,6 +90,21 @@ SocketMonitor::Schedule(unsigned flags) noexcept
 
 	if (success)
 		scheduled_flags = flags;
+#ifdef USE_EPOLL
+	else if (errno == EBADF || errno == ENOENT)
+		/* the socket was probably closed by somebody else
+		   (EBADF) or a new file descriptor with the same
+		   number was created but not registered already
+		   (ENOENT) - we can assume that there are no
+		   scheduled events */
+		/* note that when this happens, we're actually lucky
+		   that it has failed - imagine another thread may
+		   meanwhile have created something on the same file
+		   descriptor number, and has registered it; the
+		   epoll_ctl() call above would then have succeeded,
+		   but broke the other thread's epoll registration */
+		scheduled_flags = 0;
+#endif
 
 	return success;
 }

src/event/SocketMonitor.hxx

@@ -109,7 +109,7 @@ public:
 	}
 
 	bool ScheduleRead() noexcept {
-		return Schedule(GetScheduledFlags() | READ | HANGUP | ERROR);
+		return Schedule(GetScheduledFlags() | READ);
 	}
 
 	bool ScheduleWrite() noexcept {
@@ -117,7 +117,7 @@ public:
 	}
 
 	void CancelRead() noexcept {
-		Schedule(GetScheduledFlags() & ~(READ|HANGUP|ERROR));
+		Schedule(GetScheduledFlags() & ~READ);
 	}
 
 	void CancelWrite() noexcept {

src/fs/NarrowPath.hxx

@@ -90,6 +90,11 @@ public:
 	constexpr
 #endif
 	operator Path() const noexcept {
+#ifdef _UNICODE
+		if (value.IsNull())
+			return nullptr;
+#endif
+
 		return value;
 	}
 };

src/lib/icu/CaseFold.cxx

@@ -36,11 +36,6 @@
 #include <ctype.h>
 #endif
 
-#ifdef _WIN32
-#include "Win32.hxx"
-#include <windows.h>
-#endif
-
 #include <memory>
 
 #include <assert.h>
@@ -72,25 +67,6 @@ try {
 	folded.SetSize(folded_length);
 	return UCharToUTF8({folded.begin(), folded.size()});
 
-#elif defined(_WIN32)
-	const auto u = MultiByteToWideChar(CP_UTF8, src);
-
-	const int size = LCMapStringEx(LOCALE_NAME_INVARIANT,
-				       LCMAP_SORTKEY|LINGUISTIC_IGNORECASE,
-				       u.c_str(), -1, nullptr, 0,
-				       nullptr, nullptr, 0);
-	if (size <= 0)
-		return AllocatedString<>::Duplicate(src);
-
-	std::unique_ptr<wchar_t[]> buffer(new wchar_t[size]);
-	if (LCMapStringEx(LOCALE_NAME_INVARIANT,
-			  LCMAP_SORTKEY|LINGUISTIC_IGNORECASE,
-			  u.c_str(), -1, buffer.get(), size,
-			  nullptr, nullptr, 0) <= 0)
-		return AllocatedString<>::Duplicate(src);
-
-	return WideCharToMultiByte(CP_UTF8, buffer.get());
-
 #else
 #error not implemented
 #endif

src/lib/icu/CaseFold.hxx

@@ -22,7 +22,7 @@
 
 #include "config.h"
 
-#if defined(HAVE_ICU) || defined(_WIN32)
+#ifdef HAVE_ICU
 #define HAVE_ICU_CASE_FOLD
 
 #include "util/Compiler.h"

src/lib/icu/Collate.cxx

@@ -109,7 +109,7 @@ IcuCollate(const char *a, const char *b) noexcept
 	}
 
 	auto result = CompareStringEx(LOCALE_NAME_INVARIANT,
-				      LINGUISTIC_IGNORECASE,
+				      NORM_IGNORECASE,
 				      wa.c_str(), -1,
 				      wb.c_str(), -1,
 				      nullptr, nullptr, 0);

src/lib/icu/Compare.cxx

@@ -22,6 +22,11 @@
 #include "util/StringAPI.hxx"
 #include "config.h"
 
+#ifdef _WIN32
+#include "Win32.hxx"
+#include <windows.h>
+#endif
+
 #include <string.h>
 
 #ifdef HAVE_ICU_CASE_FOLD
@@ -29,6 +34,17 @@
 IcuCompare::IcuCompare(const char *_needle) noexcept
 	:needle(IcuCaseFold(_needle)) {}
 
+#elif defined(_WIN32)
+
+IcuCompare::IcuCompare(const char *_needle) noexcept
+	:needle(nullptr)
+{
+	try {
+		needle = MultiByteToWideChar(CP_UTF8, _needle);
+	} catch (...) {
+	}
+}
+
 #else
 
 IcuCompare::IcuCompare(const char *_needle) noexcept
@@ -41,6 +57,22 @@ IcuCompare::operator==(const char *haystack) const noexcept
 {
 #ifdef HAVE_ICU_CASE_FOLD
 	return StringIsEqual(IcuCaseFold(haystack).c_str(), needle.c_str());
+#elif defined(_WIN32)
+	if (needle.IsNull())
+		/* the MultiByteToWideChar() call in the constructor
+		   has failed, so let's always fail the comparison */
+		return false;
+
+	try {
+		auto w_haystack = MultiByteToWideChar(CP_UTF8, haystack);
+		return CompareStringEx(LOCALE_NAME_INVARIANT,
+				       NORM_IGNORECASE,
+				       w_haystack.c_str(), -1,
+				       needle.c_str(), -1,
+				       nullptr, nullptr, 0) == CSTR_EQUAL;
+	} catch (...) {
+		return false;
+	}
 #else
 	return strcasecmp(haystack, needle.c_str());
 #endif
@@ -52,6 +84,24 @@ IcuCompare::IsIn(const char *haystack) const noexcept
 #ifdef HAVE_ICU_CASE_FOLD
 	return StringFind(IcuCaseFold(haystack).c_str(),
 			  needle.c_str()) != nullptr;
+#elif defined(_WIN32)
+	if (needle.IsNull())
+		/* the MultiByteToWideChar() call in the constructor
+		   has failed, so let's always fail the comparison */
+		return false;
+
+	try {
+		auto w_haystack = MultiByteToWideChar(CP_UTF8, haystack);
+		return FindNLSStringEx(LOCALE_NAME_INVARIANT,
+				       FIND_FROMSTART|NORM_IGNORECASE,
+				       w_haystack.c_str(), -1,
+				       needle.c_str(), -1,
+				       nullptr,
+				       nullptr, nullptr, 0) >= 0;
+	} catch (...) {
+		/* MultiByteToWideChar() has failed */
+		return false;
+	}
 #elif defined(HAVE_STRCASESTR)
 	return strcasestr(haystack, needle.c_str()) != nullptr;
 #else

src/lib/icu/Compare.hxx

@@ -23,13 +23,23 @@
 #include "util/Compiler.h"
 #include "util/AllocatedString.hxx"
 
+#ifdef _WIN32
+#include <wchar.h>
+#endif
+
 /**
  * This class can compare one string ("needle") with lots of other
  * strings ("haystacks") efficiently, ignoring case.  With some
  * configurations, it can prepare a case-folded version of the needle.
  */
 class IcuCompare {
+#ifdef _WIN32
+	/* Windows API functions work with wchar_t strings, so let's
+	   cache the MultiByteToWideChar() result for performance */
+	AllocatedString<wchar_t> needle;
+#else
 	AllocatedString<> needle;
+#endif
 
 public:
 	IcuCompare():needle(nullptr) {}
@@ -38,12 +48,12 @@ public:
 
 	IcuCompare(const IcuCompare &src) noexcept
 		:needle(src
-			? AllocatedString<>::Duplicate(src.needle.c_str())
+			? src.needle.Clone()
 			: nullptr) {}
 
 	IcuCompare &operator=(const IcuCompare &src) noexcept {
 		needle = src
-			? AllocatedString<>::Duplicate(src.needle.c_str())
+			? src.needle.Clone()
 			: nullptr;
 		return *this;
 	}

src/lib/nfs/Connection.cxx

@@ -191,7 +191,9 @@ static constexpr int
 events_to_libnfs(unsigned i) noexcept
 {
 	return ((i & SocketMonitor::READ) ? POLLIN : 0) |
-		((i & SocketMonitor::WRITE) ? POLLOUT : 0);
+		((i & SocketMonitor::WRITE) ? POLLOUT : 0) |
+		((i & SocketMonitor::HANGUP) ? POLLHUP : 0) |
+		((i & SocketMonitor::ERROR) ? POLLERR : 0);
 }
 
 NfsConnection::~NfsConnection() noexcept
@@ -450,8 +452,7 @@ NfsConnection::ScheduleSocket() noexcept
 		SocketMonitor::Open(_fd);
 	}
 
-	SocketMonitor::Schedule(libnfs_to_events(which_events)
-				| SocketMonitor::HANGUP);
+	SocketMonitor::Schedule(libnfs_to_events(which_events));
 }
 
 inline int

src/lib/nfs/FileReader.cxx

@@ -180,7 +180,6 @@ NfsFileReader::OnNfsConnectionDisconnected(std::exception_ptr e) noexcept
 inline void
 NfsFileReader::OpenCallback(nfsfh *_fh) noexcept
 {
-	assert(state == State::OPEN);
 	assert(connection != nullptr);
 	assert(_fh != nullptr);
 
@@ -197,27 +196,33 @@ NfsFileReader::OpenCallback(nfsfh *_fh) noexcept
 }
 
 inline void
-NfsFileReader::StatCallback(const struct stat *st) noexcept
+NfsFileReader::StatCallback(const struct stat *_st) noexcept
 {
-	assert(state == State::STAT);
 	assert(connection != nullptr);
 	assert(fh != nullptr);
-	assert(st != nullptr);
+	assert(_st != nullptr);
+
+#if defined(_WIN32) && !defined(_WIN64)
+	/* on 32-bit Windows, libnfs enables -D_FILE_OFFSET_BITS=64,
+	   but MPD (Meson) doesn't - to work around this mismatch, we
+	   cast explicitly to "struct stat64" */
+	const auto *st = (const struct stat64 *)_st;
+#else
+	const auto *st = _st;
+#endif
 
 	if (!S_ISREG(st->st_mode)) {
 		OnNfsFileError(std::make_exception_ptr(std::runtime_error("Not a regular file")));
 		return;
 	}
 
-	state = State::IDLE;
-
 	OnNfsFileOpen(st->st_size);
 }
 
 void
 NfsFileReader::OnNfsCallback(unsigned status, void *data) noexcept
 {
-	switch (state) {
+	switch (std::exchange(state, State::IDLE)) {
 	case State::INITIAL:
 	case State::DEFER:
 	case State::MOUNT:
@@ -234,7 +239,6 @@ NfsFileReader::OnNfsCallback(unsigned status, void *data) noexcept
 		break;
 
 	case State::READ:
-		state = State::IDLE;
 		OnNfsFileRead(data, status);
 		break;
 	}

src/pcm/Order.cxx

@@ -21,6 +21,28 @@
 #include "PcmBuffer.hxx"
 #include "util/ConstBuffer.hxx"
 
+
+/*
+ * According to:
+ *  - https://xiph.org/flac/format.html#frame_header
+ *  - https://github.com/nu774/qaac/wiki/Multichannel--handling
+ * the source channel order (after decoding, e.g., flac, alac) is for
+ *  - 1ch:            mono
+ *  - 2ch:            left, right
+ *  - 3ch:            left, right, center
+ *  - 4ch:            front left, front right, back left, back right
+ *  - 5ch:            front left, front right, front center, back/surround left, back/surround right
+ *  - 6ch (aka 5.1):  front left, front right, front center, LFE, back/surround left, back/surround right
+ *  - 7ch:            front left, front right, front center, LFE, back center, side left, side right
+ *  - 8ch: (aka 7.1): front left, front right, front center, LFE, back left, back right, side left, side right
+ *
+ * The ALSA default channel map is (see /usr/share/alsa/pcm/surround71.conf):
+ *  - front left, front right, back left, back right, front center, LFE,  side left, side right
+ *
+ * Hence, in case of the following source channel orders 3ch, 5ch, 6ch (aka
+ * 5.1), 7ch and 8ch the channel order has to be adapted
+ */
+
 template<typename V>
 struct TwoPointers {
 	V *dest;
@@ -44,17 +66,57 @@ struct TwoPointers {
 		return *this;
 	}
 
+	TwoPointers<V> &ToAlsa50() noexcept {
+		*dest++ = src[0]; // front left
+		*dest++ = src[1]; // front right
+		*dest++ = src[3]; // surround left
+		*dest++ = src[4]; // surround right
+		*dest++ = src[2]; // front center
+		src += 5;
+		return *this;
+	}
+
 	TwoPointers<V> &ToAlsa51() noexcept {
 		return CopyTwo() // left+right
 			.SwapTwoPairs(); // center, LFE, surround left+right
 	}
 
+	TwoPointers<V> &ToAlsa70() noexcept {
+		*dest++ = src[0]; // front left
+		*dest++ = src[1]; // front right
+		*dest++ = src[5]; // side left
+		*dest++ = src[6]; // side right
+		*dest++ = src[2]; // front center
+		*dest++ = src[3]; // LFE
+		*dest++ = src[4]; // back center
+		src += 7;
+		return *this;
+	}
+
 	TwoPointers<V> &ToAlsa71() noexcept {
 		return ToAlsa51()
 			.CopyTwo(); // side left+right
 	}
 };
 
+template<typename V>
+static void
+ToAlsaChannelOrder50(V *dest, const V *src, size_t n) noexcept
+{
+	TwoPointers<V> p{dest, src};
+	for (size_t i = 0; i != n; ++i)
+		p.ToAlsa50();
+}
+
+template<typename V>
+static inline ConstBuffer<V>
+ToAlsaChannelOrder50(PcmBuffer &buffer, ConstBuffer<V> src) noexcept
+{
+	auto dest = buffer.GetT<V>(src.size);
+	ToAlsaChannelOrder50(dest, src.data, src.size / 5);
+	return { dest, src.size };
+}
+
 template<typename V>
 static void
 ToAlsaChannelOrder51(V *dest, const V *src, size_t n) noexcept
@@ -73,6 +135,24 @@ ToAlsaChannelOrder51(PcmBuffer &buffer, ConstBuffer<V> src) noexcept
 	return { dest, src.size };
 }
 
+template<typename V>
+static void
+ToAlsaChannelOrder70(V *dest, const V *src, size_t n) noexcept
+{
+	TwoPointers<V> p{dest, src};
+	for (size_t i = 0; i != n; ++i)
+		p.ToAlsa70();
+}
+
+template<typename V>
+static inline ConstBuffer<V>
+ToAlsaChannelOrder70(PcmBuffer &buffer, ConstBuffer<V> src) noexcept
+{
+	auto dest = buffer.GetT<V>(src.size);
+	ToAlsaChannelOrder70(dest, src.data, src.size / 7);
+	return { dest, src.size };
+}
+
 template<typename V>
 static void
 ToAlsaChannelOrder71(V *dest, const V *src, size_t n) noexcept
@@ -97,9 +177,15 @@ ToAlsaChannelOrderT(PcmBuffer &buffer, ConstBuffer<V> src,
 		    unsigned channels) noexcept
 {
 	switch (channels) {
+	case 5: // 5.0
+		return ToAlsaChannelOrder50(buffer, src);
+
 	case 6: // 5.1
 		return ToAlsaChannelOrder51(buffer, src);
 
+	case 7: // 7.0
+		return ToAlsaChannelOrder70(buffer, src);
+
 	case 8: // 7.1
 		return ToAlsaChannelOrder71(buffer, src);
 

src/player/CrossFade.cxx

@@ -62,7 +62,7 @@ mixramp_interpolate(const char *ramp_list, float required_db) noexcept
 			++ramp_list;
 
 		/* Check for exact match. */
-		if (db == required_db) {
+		if (db >= required_db) {
 			return duration;
 		}
 

src/player/Thread.cxx

@@ -964,6 +964,12 @@ Player::SongBorder() noexcept
 	if (border_pause) {
 		paused = true;
 		pc.listener.OnBorderPause();
+
+		/* drain all outputs to guarantee the current song is
+		   really being played to the end; without this, the
+		   Pause() call would drop all ring buffers */
+		pc.outputs.Drain();
+
 		pc.outputs.Pause();
 		idle_add(IDLE_PLAYER);
 	}

src/storage/plugins/CurlStorage.cxx

@@ -402,7 +402,7 @@ private:
 			break;
 
 		case State::HREF:
-			response.href.assign(s, len);
+			response.href.append(s, len);
 			break;
 
 		case State::STATUS:
@@ -482,7 +482,7 @@ class HttpListDirectoryOperation final : public PropfindOperation {
 public:
 	HttpListDirectoryOperation(CurlGlobal &curl, const char *uri)
 		:PropfindOperation(curl, uri, 1),
-		 base_path(UriPathOrSlash(uri)) {}
+		 base_path(CurlUnescape(GetEasy(), UriPathOrSlash(uri))) {}
 
 	std::unique_ptr<StorageDirectoryReader> Perform() {
 		DeferStart();
@@ -507,8 +507,7 @@ private:
 
 		/* kludge: ignoring case in this comparison to avoid
 		   false negatives if the web server uses a different
-		   case in hex digits in escaped characters; TODO:
-		   implement properly */
+		   case */
 		path = StringAfterPrefixIgnoreCase(path, base_path.c_str());
 		if (path == nullptr || *path == 0)
 			return nullptr;
@@ -531,11 +530,12 @@ protected:
 		if (r.status != 200)
 			return;
 
-		const auto escaped_name = HrefToEscapedName(r.href.c_str());
-		if (escaped_name.IsNull())
+		std::string href = CurlUnescape(GetEasy(), r.href.c_str());
+		const auto name = HrefToEscapedName(href.c_str());
+		if (name.IsNull())
 			return;
 
-		entries.emplace_front(CurlUnescape(GetEasy(), escaped_name));
+		entries.emplace_front(std::string(name.data, name.size));
 
 		auto &info = entries.front().info;
 		info = StorageFileInfo(r.collection

src/tag/Fallback.hxx

@@ -45,6 +45,10 @@ ApplyTagFallback(TagType type, F &&f) noexcept
 		   "AlbumArtist"/"ArtistSort" was found */
 		return f(TAG_ARTIST);
 
+	if (type == TAG_ALBUM_SORT)
+		/* fall back to "Album" if no "AlbumSort" was found */
+		return f(TAG_ALBUM);
+
 	return false;
 }
 

src/util/Math.hxx

@@ -30,11 +30,16 @@
 #ifndef MATH_HXX
 #define MATH_HXX
 
+#include <cmath>
+
+/*
+ * C99 math can be optionally omitted with gcc's libstdc++.
+ * Use boost if unavailable.
+ */
 #if (defined(__GLIBCPP__) || defined(__GLIBCXX__)) && !defined(_GLIBCXX_USE_C99_MATH)
 #include <boost/math/special_functions/round.hpp>
 using boost::math::lround;
 #else
-#include <cmath>
 using std::lround;
 #endif
 

src/zeroconf/AvahiPoll.cxx

@@ -26,9 +26,7 @@ static unsigned
 FromAvahiWatchEvent(AvahiWatchEvent e)
 {
 	return (e & AVAHI_WATCH_IN ? SocketMonitor::READ : 0) |
-		(e & AVAHI_WATCH_OUT ? SocketMonitor::WRITE : 0) |
-		(e & AVAHI_WATCH_ERR ? SocketMonitor::ERROR : 0) |
-		(e & AVAHI_WATCH_HUP ? SocketMonitor::HANGUP : 0);
+		(e & AVAHI_WATCH_OUT ? SocketMonitor::WRITE : 0);
 }
 
 static AvahiWatchEvent