Merge branch 'v0.21.x'

src/decoder/plugins/OpusDecoderPlugin.cxx

@@ -208,10 +208,12 @@ MPDOpusDecoder::HandleTags(const ogg_packet &packet)
 	TagBuilder tag_builder;
 	AddTagHandler h(tag_builder);
 
-	if (ScanOpusTags(packet.packet, packet.bytes, &rgi, h) &&
-	    !tag_builder.empty()) {
-		client.SubmitReplayGain(&rgi);
+	if (!ScanOpusTags(packet.packet, packet.bytes, &rgi, h))
+		return;
 
+	client.SubmitReplayGain(&rgi);
+
+	if (!tag_builder.empty()) {
 		Tag tag = tag_builder.Commit();
 		auto cmd = client.SubmitTag(input_stream, std::move(tag));
 		if (cmd != DecoderCommand::NONE)

src/output/plugins/PulseOutputPlugin.cxx

@@ -581,8 +581,8 @@ PulseOutput::SetupStream(const pa_sample_spec &ss)
 
 	/* WAVE-EX is been adopted as the speaker map for most media files */
 	pa_channel_map chan_map;
-	pa_channel_map_init_auto(&chan_map, ss.channels,
-				 PA_CHANNEL_MAP_WAVEEX);
+	pa_channel_map_init_extend(&chan_map, ss.channels,
+				   PA_CHANNEL_MAP_WAVEEX);
 	stream = pa_stream_new(context, name, &ss, &chan_map);
 	if (stream == nullptr)
 		throw MakePulseError(context,

src/song/StringFilter.cxx

@@ -22,13 +22,10 @@
 
 #include <assert.h>
 
-inline bool
+bool
 StringFilter::MatchWithoutNegation(const char *s) const noexcept
 {
-#if !CLANG_CHECK_VERSION(3,6)
-	/* disabled on clang due to -Wtautological-pointer-compare */
 	assert(s != nullptr);
-#endif
 
 #ifdef HAVE_PCRE
 	if (regex)

src/song/StringFilter.hxx

@@ -105,7 +105,9 @@ public:
 	gcc_pure
 	bool Match(const char *s) const noexcept;
 
-private:
+	/**
+	 * Like Match(), but ignore the "negated" flag.
+	 */
 	gcc_pure
 	bool MatchWithoutNegation(const char *s) const noexcept;
 };

src/song/TagSongFilter.cxx

@@ -35,42 +35,41 @@ TagSongFilter::ToExpression() const noexcept
 }
 
 bool
-TagSongFilter::MatchNN(const TagItem &item) const noexcept
-{
-	return (type == TAG_NUM_OF_ITEM_TYPES || item.type == type) &&
-		filter.Match(item.value);
-}
-
-bool
-TagSongFilter::MatchNN(const Tag &tag) const noexcept
+TagSongFilter::Match(const Tag &tag) const noexcept
 {
 	bool visited_types[TAG_NUM_OF_ITEM_TYPES]{};
 
 	for (const auto &i : tag) {
 		visited_types[i.type] = true;
 
-		if (MatchNN(i))
-			return true;
+		if ((type == TAG_NUM_OF_ITEM_TYPES || i.type == type) &&
+		    filter.MatchWithoutNegation(i.value))
+			return !filter.IsNegated();
 	}
 
 	if (type < TAG_NUM_OF_ITEM_TYPES && !visited_types[type]) {
+		/* if the specified tag is not present, try the
+		   fallback tags */
+
 		bool result = false;
-		if (ApplyTagFallback(type,
-				     [&](TagType tag2) {
-			     if (!visited_types[tag2])
-				     return false;
+		if (ApplyTagFallback(type, [&](TagType tag2) {
+			if (!visited_types[tag2])
+				/* we already know that this tag type
+				   isn't present, so let's bail out
+				   without checking again */
+				return false;
 
-			     for (const auto &item : tag) {
-				     if (item.type == tag2 &&
-					 filter.Match(item.value)) {
-					     result = true;
-					     break;
-				     }
-			     }
+			for (const auto &item : tag) {
+				if (item.type == tag2 &&
+				    filter.MatchWithoutNegation(item.value)) {
+					result = true;
+					break;
+				}
+			}
 
-			     return true;
-		     }))
-			return result;
+			return true;
+		}))
+			return result != filter.IsNegated();
 
 		/* If the search critieron was not visited during the
 		   sweep through the song's tag, it means this field
@@ -79,14 +78,14 @@ TagSongFilter::MatchNN(const Tag &tag) const noexcept
 		   then it's a match as well and we should return
 		   true. */
 		if (filter.empty())
-			return true;
+			return !filter.IsNegated();
 	}
 
-	return false;
+	return filter.IsNegated();
 }
 
 bool
 TagSongFilter::Match(const LightSong &song) const noexcept
 {
-	return MatchNN(song.tag);
+	return Match(song.tag);
 }

src/song/TagSongFilter.hxx

@@ -68,8 +68,7 @@ public:
 	bool Match(const LightSong &song) const noexcept override;
 
 private:
-	bool MatchNN(const Tag &tag) const noexcept;
-	bool MatchNN(const TagItem &tag) const noexcept;
+	bool Match(const Tag &tag) const noexcept;
 };
 
 #endif

src/tag/Fallback.hxx

@@ -22,6 +22,11 @@
 
 #include <utility>
 
+/**
+ * Invoke the given function for all fallback tags of the given
+ * #TagType, until the function returns true (or until there are no
+ * more fallback tags).
+ */
 template<typename F>
 bool
 ApplyTagFallback(TagType type, F &&f) noexcept
@@ -43,6 +48,11 @@ ApplyTagFallback(TagType type, F &&f) noexcept
 	return false;
 }
 
+/**
+ * Invoke the given function for the given #TagType and all of its
+ * fallback tags, until the function returns true (or until there are
+ * no more fallback tags).
+ */
 template<typename F>
 bool
 ApplyTagWithFallback(TagType type, F &&f) noexcept