Merge branch 'v0.23.x'

src/decoder/plugins/FfmpegDecoderPlugin.cxx

@@ -384,6 +384,7 @@ static void
 FfmpegParseMetaData(const AVStream &stream,
 		    ReplayGainInfo &rg, MixRampInfo &mr)
 {
+	if (stream.metadata != nullptr)
 		FfmpegParseMetaData(*stream.metadata, rg, mr);
 }
 
@@ -393,7 +394,9 @@ FfmpegParseMetaData(const AVFormatContext &format_context, int audio_stream,
 {
 	assert(audio_stream >= 0);
 
+	if (format_context.metadata != nullptr)
 		FfmpegParseMetaData(*format_context.metadata, rg, mr);
+
 	FfmpegParseMetaData(*format_context.streams[audio_stream],
 				    rg, mr);
 }

src/encoder/meson.build

@@ -3,6 +3,22 @@ encoder_features = configuration_data()
 encoder_features.set('ENABLE_ENCODER', need_encoder)
 
 if not need_encoder
+  if need_wave_encoder
+    # Special case for the Snapcast output plugin which only needs the
+    # PCM wave encoder encoder plugin
+    encoder_glue = static_library(
+      'encoder_glue',
+      'plugins/WaveEncoderPlugin.cxx',
+      include_directories: inc,
+    )
+
+    encoder_glue_dep = declare_dependency(
+      link_with: encoder_glue,
+    )
+
+    subdir_done()
+  endif
+
   encoder_glue_dep = dependency('', required: false)
   configure_file(output: 'Features.h', configuration: encoder_features)
   subdir_done()

src/encoder/plugins/meson.build

@@ -35,7 +35,7 @@ if libshine_dep.found()
 endif
 
 encoder_features.set('ENABLE_WAVE_ENCODER', get_option('wave_encoder'))
-if get_option('wave_encoder')
+if get_option('wave_encoder') or need_wave_encoder
   encoder_plugins_sources += 'WaveEncoderPlugin.cxx'
 endif
 

src/output/plugins/meson.build

@@ -10,6 +10,7 @@ output_plugins_deps = [
 ]
 
 need_encoder = false
+need_wave_encoder = false
 
 if alsa_dep.found()
   output_plugins_sources += 'AlsaOutputPlugin.cxx'
@@ -127,9 +128,7 @@ if get_option('snapcast')
 
   output_features.set('HAVE_YAJL', yajl_dep.found())
 
-  # TODO: the Snapcast plugin needs just the "wave" encoder, but this
+  need_wave_encoder = true
-  # enables all available encoders
-  need_encoder = true
 endif
 
 enable_solaris_output = get_option('solaris_output')

src/tag/ApeLoader.cxx

@@ -73,10 +73,10 @@ try {
 	unsigned n = FromLE32(footer.count);
 	const char *p = buffer.get();
 	while (n-- && remaining > 10) {
-		size_t size = FromLE32(*(const uint32_t *)p);
+		size_t size = *(const PackedLE32 *)p;
 		p += 4;
 		remaining -= 4;
-		unsigned long flags = FromLE32(*(const uint32_t *)p);
+		unsigned long flags = *(const PackedLE32 *)p;
 		p += 4;
 		remaining -= 4;
 

src/tag/Id3Picture.cxx

@@ -32,7 +32,7 @@ ReadString(ConstBuffer<uint8_t> &src) noexcept
 	if (src.size < 4)
 		return nullptr;
 
-	const size_t length = FromBE32(*(const uint32_t *)src.data);
+	const size_t length = *(const PackedBE32 *)src.data;
 	src.skip_front(4);
 
 	if (src.size < length)
@@ -65,7 +65,7 @@ ScanId3Apic(ConstBuffer<void> _buffer, TagHandler &handler) noexcept
 
 	buffer.skip_front(16);
 
-	const size_t image_size = FromBE32(*(const uint32_t *)buffer.data);
+	const size_t image_size = *(const PackedBE32 *)buffer.data;
 	buffer.skip_front(4);
 
 	if (buffer.size < image_size)

src/util/ByteOrder.hxx

@@ -297,6 +297,60 @@ public:
 static_assert(sizeof(PackedBE16) == sizeof(uint16_t), "Wrong size");
 static_assert(alignof(PackedBE16) == 1, "Wrong alignment");
 
+/**
+ * A packed big-endian 32 bit integer.
+ */
+class PackedBE32 {
+	uint8_t a, b, c, d;
+
+public:
+	PackedBE32() = default;
+
+	constexpr PackedBE32(uint32_t src) noexcept
+		:a(uint8_t(src >> 24)),
+		 b(uint8_t(src >> 16)),
+		 c(uint8_t(src >> 8)),
+		 d(uint8_t(src)) {}
+
+	/**
+	 * Construct an instance from an integer which is already
+	 * big-endian.
+	 */
+	static constexpr auto FromBE(uint32_t src) noexcept {
+		union {
+			uint32_t in;
+			PackedBE32 out;
+		} u{src};
+		return u.out;
+	}
+
+	constexpr operator uint32_t() const noexcept {
+		return (uint32_t(a) << 24) | (uint32_t(b) << 16) |
+			(uint32_t(c) << 8) | uint32_t(d);
+	}
+
+	PackedBE32 &operator=(uint32_t new_value) noexcept {
+		d = uint8_t(new_value);
+		c = uint8_t(new_value >> 8);
+		b = uint8_t(new_value >> 16);
+		a = uint8_t(new_value >> 24);
+		return *this;
+	}
+
+	/**
+	 * Reads the raw, big-endian value.
+	 */
+	constexpr uint32_t raw() const noexcept {
+		uint32_t x = *this;
+		if (IsLittleEndian())
+			x = ByteSwap32(x);
+		return x;
+	}
+};
+
+static_assert(sizeof(PackedBE32) == sizeof(uint32_t), "Wrong size");
+static_assert(alignof(PackedBE32) == 1, "Wrong alignment");
+
 /**
  * A packed little-endian 16 bit integer.
  */

test/meson.build

@@ -595,7 +595,7 @@ executable(
 # Encoder
 #
 
-if encoder_glue_dep.found()
+if need_encoder
   executable(
     'run_encoder',
     'run_encoder.cxx',