pcm/*: add "noexcept"

35 files changed, 123 insertions, 120 deletions

diff --git a/src/pcm/ChannelsConverter.cxx b/src/pcm/ChannelsConverter.cxx
index c03c3e7ed..479551989 100644
--- a/src/pcm/ChannelsConverter.cxx
+++ b/src/pcm/ChannelsConverter.cxx
@@ -49,7 +49,7 @@ PcmChannelsConverter::Open(SampleFormat _format,
 }
 
 void
-PcmChannelsConverter::Close()
+PcmChannelsConverter::Close() noexcept
 {
 #ifndef NDEBUG
 	format = SampleFormat::UNDEFINED;
diff --git a/src/pcm/ChannelsConverter.hxx b/src/pcm/ChannelsConverter.hxx
index b14958ea1..510f72cfd 100644
--- a/src/pcm/ChannelsConverter.hxx
+++ b/src/pcm/ChannelsConverter.hxx
@@ -41,10 +41,10 @@ class PcmChannelsConverter {
 
 public:
 #ifndef NDEBUG
-	PcmChannelsConverter()
+	PcmChannelsConverter() noexcept
 		:format(SampleFormat::UNDEFINED) {}
 
-	~PcmChannelsConverter() {
+	~PcmChannelsConverter() noexcept {
 		assert(format == SampleFormat::UNDEFINED);
 	}
 #endif
@@ -64,7 +64,7 @@ public:
 	/**
 	 * Closes the object.  After that, you may call Open() again.
 	 */
-	void Close();
+	void Close() noexcept;
 
 	/**
 	 * Convert a block of PCM data.
diff --git a/src/pcm/ConfiguredResampler.cxx b/src/pcm/ConfiguredResampler.cxx
index bd44a95f3..d2093a188 100644
--- a/src/pcm/ConfiguredResampler.cxx
+++ b/src/pcm/ConfiguredResampler.cxx
@@ -52,7 +52,7 @@ enum class SelectedResampler {
 static SelectedResampler selected_resampler = SelectedResampler::FALLBACK;
 
 static const ConfigBlock *
-MakeResamplerDefaultConfig(ConfigBlock &block)
+MakeResamplerDefaultConfig(ConfigBlock &block) noexcept
 {
 	assert(block.IsEmpty());
 
@@ -71,7 +71,7 @@ MakeResamplerDefaultConfig(ConfigBlock &block)
  * "resampler" block.
  */
 static const ConfigBlock *
-MigrateResamplerConfig(const ConfigParam &param, ConfigBlock &block)
+MigrateResamplerConfig(const ConfigParam &param, ConfigBlock &block) noexcept
 {
 	assert(block.IsEmpty());
 
@@ -102,7 +102,7 @@ MigrateResamplerConfig(const ConfigParam &param, ConfigBlock &block)
 }
 
 static const ConfigBlock *
-MigrateResamplerConfig(const ConfigParam *param, ConfigBlock &buffer)
+MigrateResamplerConfig(const ConfigParam *param, ConfigBlock &buffer) noexcept
 {
 	assert(buffer.IsEmpty());
 
diff --git a/src/pcm/FallbackResampler.cxx b/src/pcm/FallbackResampler.cxx
index ead8fcfa1..8a41fa4d9 100644
--- a/src/pcm/FallbackResampler.cxx
+++ b/src/pcm/FallbackResampler.cxx
@@ -57,7 +57,7 @@ FallbackPcmResampler::Open(AudioFormat &af, unsigned new_sample_rate)
 }
 
 void
-FallbackPcmResampler::Close()
+FallbackPcmResampler::Close() noexcept
 {
 }
 
@@ -67,7 +67,7 @@ pcm_resample_fallback(PcmBuffer &buffer,
 		      unsigned channels,
 		      unsigned src_rate,
 		      ConstBuffer<T> src,
-		      unsigned dest_rate)
+		      unsigned dest_rate) noexcept
 {
 	unsigned dest_pos = 0;
 	unsigned src_frames = src.size / channels;
@@ -107,7 +107,7 @@ pcm_resample_fallback_void(PcmBuffer &buffer,
 			   unsigned channels,
 			   unsigned src_rate,
 			   ConstBuffer<void> src,
-			   unsigned dest_rate)
+			   unsigned dest_rate) noexcept
 {
 	const auto typed_src = ConstBuffer<T>::FromVoid(src);
 	return pcm_resample_fallback(buffer, channels, src_rate, typed_src,
diff --git a/src/pcm/FallbackResampler.hxx b/src/pcm/FallbackResampler.hxx
index 283bc46eb..ec82b301d 100644
--- a/src/pcm/FallbackResampler.hxx
+++ b/src/pcm/FallbackResampler.hxx
@@ -37,7 +37,7 @@ class FallbackPcmResampler final : public PcmResampler {
 
 public:
 	AudioFormat Open(AudioFormat &af, unsigned new_sample_rate) override;
-	void Close() override;
+	void Close() noexcept override;
 	ConstBuffer<void> Resample(ConstBuffer<void> src) override;
 };
 
diff --git a/src/pcm/FormatConverter.hxx b/src/pcm/FormatConverter.hxx
index 082dd4f1c..e723179dc 100644
--- a/src/pcm/FormatConverter.hxx
+++ b/src/pcm/FormatConverter.hxx
@@ -42,11 +42,11 @@ class PcmFormatConverter {
 
 public:
 #ifndef NDEBUG
-	PcmFormatConverter()
+	PcmFormatConverter() noexcept
 		:src_format(SampleFormat::UNDEFINED),
 		 dest_format(SampleFormat::UNDEFINED) {}
 
-	~PcmFormatConverter() {
+	~PcmFormatConverter() noexcept {
 		assert(src_format == SampleFormat::UNDEFINED);
 		assert(dest_format == SampleFormat::UNDEFINED);
 	}
diff --git a/src/pcm/GlueResampler.cxx b/src/pcm/GlueResampler.cxx
index 9b48eb5ff..36ee4648b 100644
--- a/src/pcm/GlueResampler.cxx
+++ b/src/pcm/GlueResampler.cxx
@@ -27,7 +27,7 @@
 GluePcmResampler::GluePcmResampler()
 	:resampler(pcm_resampler_create()) {}
 
-GluePcmResampler::~GluePcmResampler()
+GluePcmResampler::~GluePcmResampler() noexcept
 {
 	delete resampler;
 }
@@ -57,7 +57,7 @@ GluePcmResampler::Open(AudioFormat src_format, unsigned new_sample_rate)
 }
 
 void
-GluePcmResampler::Close()
+GluePcmResampler::Close() noexcept
 {
 	if (requested_sample_format != src_sample_format)
 		format_converter.Close();
@@ -66,7 +66,7 @@ GluePcmResampler::Close()
 }
 
 void
-GluePcmResampler::Reset()
+GluePcmResampler::Reset() noexcept
 {
 	resampler->Reset();
 }
diff --git a/src/pcm/GlueResampler.hxx b/src/pcm/GlueResampler.hxx
index e2afa30ce..6c81d1886 100644
--- a/src/pcm/GlueResampler.hxx
+++ b/src/pcm/GlueResampler.hxx
@@ -46,19 +46,19 @@ class GluePcmResampler {
 
 public:
 	GluePcmResampler();
-	~GluePcmResampler();
+	~GluePcmResampler() noexcept;
 
 	void Open(AudioFormat src_format, unsigned new_sample_rate);
-	void Close();
+	void Close() noexcept;
 
-	SampleFormat GetOutputSampleFormat() const {
+	SampleFormat GetOutputSampleFormat() const noexcept {
 		return output_sample_format;
 	}
 
 	/**
 	 * @see PcmResampler::Reset()
 	 */
-	void Reset();
+	void Reset() noexcept;
 
 	ConstBuffer<void> Resample(ConstBuffer<void> src);
 };
diff --git a/src/pcm/Interleave.cxx b/src/pcm/Interleave.cxx
index 3c6beb91c..c428c8f36 100644
--- a/src/pcm/Interleave.cxx
+++ b/src/pcm/Interleave.cxx
@@ -25,7 +25,7 @@
 static void
 GenericPcmInterleave(uint8_t *gcc_restrict dest,
 		     ConstBuffer<const uint8_t *> src,
-		     size_t n_frames, size_t sample_size)
+		     size_t n_frames, size_t sample_size) noexcept
 {
 	for (size_t frame = 0; frame < n_frames; ++frame) {
 		for (size_t channel = 0; channel < src.size; ++channel) {
@@ -41,7 +41,7 @@ static void
 PcmInterleaveStereo(T *gcc_restrict dest,
 		    const T *gcc_restrict src1,
 		    const T *gcc_restrict src2,
-		    size_t n_frames)
+		    size_t n_frames) noexcept
 {
 	for (size_t i = 0; i != n_frames; ++i) {
 		*dest++ = *src1++;
@@ -53,7 +53,7 @@ template<typename T>
 static void
 PcmInterleaveT(T *gcc_restrict dest,
 	       const ConstBuffer<const T *> src,
-	       size_t n_frames)
+	       size_t n_frames) noexcept
 {
 	switch (src.size) {
 	case 2:
@@ -73,7 +73,7 @@ PcmInterleaveT(T *gcc_restrict dest,
 static void
 PcmInterleave16(int16_t *gcc_restrict dest,
 		const ConstBuffer<const int16_t *> src,
-		size_t n_frames)
+		size_t n_frames) noexcept
 {
 	PcmInterleaveT(dest, src, n_frames);
 }
@@ -81,7 +81,7 @@ PcmInterleave16(int16_t *gcc_restrict dest,
 void
 PcmInterleave32(int32_t *gcc_restrict dest,
 		const ConstBuffer<const int32_t *> src,
-		size_t n_frames)
+		size_t n_frames) noexcept
 {
 	PcmInterleaveT(dest, src, n_frames);
 }
@@ -89,7 +89,7 @@ PcmInterleave32(int32_t *gcc_restrict dest,
 void
 PcmInterleave(void *gcc_restrict dest,
 	      ConstBuffer<const void *> src,
-	      size_t n_frames, size_t sample_size)
+	      size_t n_frames, size_t sample_size) noexcept
 {
 	switch (sample_size) {
 	case 2:
diff --git a/src/pcm/Interleave.hxx b/src/pcm/Interleave.hxx
index 902a6b651..a94bc67f6 100644
--- a/src/pcm/Interleave.hxx
+++ b/src/pcm/Interleave.hxx
@@ -31,7 +31,7 @@
  */
 void
 PcmInterleave(void *gcc_restrict dest, ConstBuffer<const void *> src,
-	      size_t n_frames, size_t sample_size);
+	      size_t n_frames, size_t sample_size) noexcept;
 
 /**
  * A variant of PcmInterleave() that assumes 32 bit samples (4 bytes
@@ -39,11 +39,11 @@ PcmInterleave(void *gcc_restrict dest, ConstBuffer<const void *> src,
  */
 void
 PcmInterleave32(int32_t *gcc_restrict dest, ConstBuffer<const int32_t *> src,
-		size_t n_frames);
+		size_t n_frames) noexcept;
 
 static inline void
 PcmInterleaveFloat(float *gcc_restrict dest, ConstBuffer<const float *> src,
-		   size_t n_frames)
+		   size_t n_frames) noexcept
 {
 	PcmInterleave32((int32_t *)dest,
 			ConstBuffer<const int32_t *>((const int32_t *const*)src.data,
diff --git a/src/pcm/LibsamplerateResampler.cxx b/src/pcm/LibsamplerateResampler.cxx
index 957bea03f..ef01aad65 100644
--- a/src/pcm/LibsamplerateResampler.cxx
+++ b/src/pcm/LibsamplerateResampler.cxx
@@ -109,13 +109,13 @@ LibsampleratePcmResampler::Open(AudioFormat &af, unsigned new_sample_rate)
 }
 
 void
-LibsampleratePcmResampler::Close()
+LibsampleratePcmResampler::Close() noexcept
 {
 	state = src_delete(state);
 }
 
 void
-LibsampleratePcmResampler::Reset()
+LibsampleratePcmResampler::Reset() noexcept
 {
 	src_reset(state);
 }
diff --git a/src/pcm/LibsamplerateResampler.hxx b/src/pcm/LibsamplerateResampler.hxx
index 3660bfd84..988a0575d 100644
--- a/src/pcm/LibsamplerateResampler.hxx
+++ b/src/pcm/LibsamplerateResampler.hxx
@@ -43,8 +43,8 @@ class LibsampleratePcmResampler final : public PcmResampler {
 
 public:
 	AudioFormat Open(AudioFormat &af, unsigned new_sample_rate) override;
-	void Close() override;
-	void Reset() override;
+	void Close() noexcept override;
+	void Reset() noexcept override;
 	ConstBuffer<void> Resample(ConstBuffer<void> src) override;
 
 private:
diff --git a/src/pcm/Neon.hxx b/src/pcm/Neon.hxx
index 1205409cc..3aa7f6d47 100644
--- a/src/pcm/Neon.hxx
+++ b/src/pcm/Neon.hxx
@@ -66,7 +66,8 @@ struct NeonFloatTo16 {
 
 	static constexpr size_t BLOCK_SIZE = 16;
 
-	void Convert(int16_t *dst, const float *src, const size_t n) const {
+	void Convert(int16_t *dst, const float *src,
+		     const size_t n) const noexcept {
 		for (unsigned i = 0; i < n / BLOCK_SIZE;
 		     ++i, src += BLOCK_SIZE, dst += BLOCK_SIZE) {
 			/* load 16 float samples into 4 quad
diff --git a/src/pcm/PcmBuffer.cxx b/src/pcm/PcmBuffer.cxx
index bc9d86c88..3eb016f73 100644
--- a/src/pcm/PcmBuffer.cxx
+++ b/src/pcm/PcmBuffer.cxx
@@ -21,7 +21,7 @@
 #include "PcmBuffer.hxx"
 
 void *
-PcmBuffer::Get(size_t new_size)
+PcmBuffer::Get(size_t new_size) noexcept
 {
 	if (new_size == 0)
 		/* never return nullptr, because nullptr would be
diff --git a/src/pcm/PcmBuffer.hxx b/src/pcm/PcmBuffer.hxx
index 68b169eb3..f7917554c 100644
--- a/src/pcm/PcmBuffer.hxx
+++ b/src/pcm/PcmBuffer.hxx
@@ -34,7 +34,7 @@ class PcmBuffer {
 	ReusableArray<uint8_t, 8192> buffer;
 
 public:
-	void Clear() {
+	void Clear() noexcept {
 		buffer.Clear();
 	}
 
@@ -48,11 +48,11 @@ public:
 	 * always an error.
 	 */
 	gcc_malloc gcc_returns_nonnull
-	void *Get(size_t size);
+	void *Get(size_t size) noexcept;
 
 	template<typename T>
 	gcc_malloc gcc_returns_nonnull
-	T *GetT(size_t n) {
+	T *GetT(size_t n) noexcept {
 		return (T *)Get(n * sizeof(T));
 	}
 };
diff --git a/src/pcm/PcmChannels.cxx b/src/pcm/PcmChannels.cxx
index 1105e7412..27c85acc7 100644
--- a/src/pcm/PcmChannels.cxx
+++ b/src/pcm/PcmChannels.cxx
@@ -33,7 +33,7 @@
 
 template<typename D, typename S>
 static void
-MonoToStereo(D dest, S src, S end)
+MonoToStereo(D dest, S src, S end) noexcept
 {
 	while (src != end) {
 		const auto value = *src++;
@@ -47,7 +47,7 @@ MonoToStereo(D dest, S src, S end)
 template<SampleFormat F, class Traits=SampleTraits<F>>
 static typename Traits::value_type
 StereoToMono(typename Traits::value_type _a,
-	     typename Traits::value_type _b)
+	     typename Traits::value_type _b) noexcept
 {
 	typename Traits::sum_type a(_a);
 	typename Traits::sum_type b(_b);
@@ -59,7 +59,7 @@ template<SampleFormat F, class Traits=SampleTraits<F>>
 static typename Traits::pointer_type
 StereoToMono(typename Traits::pointer_type dest,
 	     typename Traits::const_pointer_type src,
-	     typename Traits::const_pointer_type end)
+	     typename Traits::const_pointer_type end) noexcept
 {
 	while (src != end) {
 		const auto a = *src++;
@@ -76,7 +76,7 @@ static typename Traits::pointer_type
 NToStereo(typename Traits::pointer_type dest,
 	  unsigned src_channels,
 	  typename Traits::const_pointer_type src,
-	  typename Traits::const_pointer_type end)
+	  typename Traits::const_pointer_type end) noexcept
 {
 	assert((end - src) % src_channels == 0);
 
@@ -105,7 +105,7 @@ static typename Traits::pointer_type
 StereoToN(typename Traits::pointer_type dest,
 	  unsigned dest_channels,
 	  typename Traits::const_pointer_type src,
-	  typename Traits::const_pointer_type end)
+	  typename Traits::const_pointer_type end) noexcept
 {
 	assert(dest_channels > 2);
 	assert((end - src) % 2 == 0);
@@ -133,7 +133,7 @@ NToM(typename Traits::pointer_type dest,
      unsigned dest_channels,
      unsigned src_channels,
      typename Traits::const_pointer_type src,
-     typename Traits::const_pointer_type end)
+     typename Traits::const_pointer_type end) noexcept
 {
 	assert((end - src) % src_channels == 0);
 
@@ -157,7 +157,7 @@ static ConstBuffer<typename Traits::value_type>
 ConvertChannels(PcmBuffer &buffer,
 		unsigned dest_channels,
 		unsigned src_channels,
-		ConstBuffer<typename Traits::value_type> src)
+		ConstBuffer<typename Traits::value_type> src) noexcept
 {
 	assert(src.size % src_channels == 0);
 
@@ -184,7 +184,7 @@ ConstBuffer<int16_t>
 pcm_convert_channels_16(PcmBuffer &buffer,
 			unsigned dest_channels,
 			unsigned src_channels,
-			ConstBuffer<int16_t> src)
+			ConstBuffer<int16_t> src) noexcept
 {
 	return ConvertChannels<SampleFormat::S16>(buffer, dest_channels,
 						  src_channels, src);
@@ -194,7 +194,7 @@ ConstBuffer<int32_t>
 pcm_convert_channels_24(PcmBuffer &buffer,
 			unsigned dest_channels,
 			unsigned src_channels,
-			ConstBuffer<int32_t> src)
+			ConstBuffer<int32_t> src) noexcept
 {
 	return ConvertChannels<SampleFormat::S24_P32>(buffer, dest_channels,
 						      src_channels, src);
@@ -204,7 +204,7 @@ ConstBuffer<int32_t>
 pcm_convert_channels_32(PcmBuffer &buffer,
 			unsigned dest_channels,
 			unsigned src_channels,
-			ConstBuffer<int32_t> src)
+			ConstBuffer<int32_t> src) noexcept
 {
 	return ConvertChannels<SampleFormat::S32>(buffer, dest_channels,
 						  src_channels, src);
@@ -214,7 +214,7 @@ ConstBuffer<float>
 pcm_convert_channels_float(PcmBuffer &buffer,
 			   unsigned dest_channels,
 			   unsigned src_channels,
-			   ConstBuffer<float> src)
+			   ConstBuffer<float> src) noexcept
 {
 	return ConvertChannels<SampleFormat::FLOAT>(buffer, dest_channels,
 						    src_channels, src);
diff --git a/src/pcm/PcmChannels.hxx b/src/pcm/PcmChannels.hxx
index 48b9bae31..b963c9e97 100644
--- a/src/pcm/PcmChannels.hxx
+++ b/src/pcm/PcmChannels.hxx
@@ -38,7 +38,7 @@ ConstBuffer<int16_t>
 pcm_convert_channels_16(PcmBuffer &buffer,
 			unsigned dest_channels,
 			unsigned src_channels,
-			ConstBuffer<int16_t> src);
+			ConstBuffer<int16_t> src) noexcept;
 
 /**
  * Changes the number of channels in 24 bit PCM data (aligned at 32
@@ -54,7 +54,7 @@ ConstBuffer<int32_t>
 pcm_convert_channels_24(PcmBuffer &buffer,
 			unsigned dest_channels,
 			unsigned src_channels,
-			ConstBuffer<int32_t> src);
+			ConstBuffer<int32_t> src) noexcept;
 
 /**
  * Changes the number of channels in 32 bit PCM data.
@@ -69,7 +69,7 @@ ConstBuffer<int32_t>
 pcm_convert_channels_32(PcmBuffer &buffer,
 			unsigned dest_channels,
 			unsigned src_channels,
-			ConstBuffer<int32_t> src);
+			ConstBuffer<int32_t> src) noexcept;
 
 /**
  * Changes the number of channels in 32 bit float PCM data.
@@ -84,6 +84,6 @@ ConstBuffer<float>
 pcm_convert_channels_float(PcmBuffer &buffer,
 			   unsigned dest_channels,
 			   unsigned src_channels,
-			   ConstBuffer<float> src);
+			   ConstBuffer<float> src) noexcept;
 
 #endif
diff --git a/src/pcm/PcmConvert.cxx b/src/pcm/PcmConvert.cxx
index 0752b1db8..a63e92a7c 100644
--- a/src/pcm/PcmConvert.cxx
+++ b/src/pcm/PcmConvert.cxx
@@ -30,7 +30,7 @@ pcm_convert_global_init()
 	pcm_resampler_global_init();
 }
 
-PcmConvert::PcmConvert()
+PcmConvert::PcmConvert() noexcept
 {
 #ifndef NDEBUG
 	src_format.Clear();
@@ -38,7 +38,7 @@ PcmConvert::PcmConvert()
 #endif
 }
 
-PcmConvert::~PcmConvert()
+PcmConvert::~PcmConvert() noexcept
 {
 	assert(!src_format.IsValid());
 	assert(!dest_format.IsValid());
@@ -97,7 +97,7 @@ PcmConvert::Open(const AudioFormat _src_format, const AudioFormat _dest_format)
 }
 
 void
-PcmConvert::Close()
+PcmConvert::Close() noexcept
 {
 	if (enable_channels)
 		channels_converter.Close();
@@ -117,7 +117,7 @@ PcmConvert::Close()
 }
 
 void
-PcmConvert::Reset()
+PcmConvert::Reset() noexcept
 {
 	if (enable_resampler)
 		resampler.Reset();
diff --git a/src/pcm/PcmConvert.hxx b/src/pcm/PcmConvert.hxx
index 617348cac..264179635 100644
--- a/src/pcm/PcmConvert.hxx
+++ b/src/pcm/PcmConvert.hxx
@@ -51,8 +51,8 @@ class PcmConvert {
 	bool enable_resampler, enable_format, enable_channels;
 
 public:
-	PcmConvert();
-	~PcmConvert();
+	PcmConvert() noexcept;
+	~PcmConvert() noexcept;
 
 	/**
 	 * Prepare the object.  Call Close() when done.
@@ -65,12 +65,12 @@ public:
 	 * Close the object after it was prepared with Open().  After
 	 * that, it may be reused by calling Open() again.
 	 */
-	void Close();
+	void Close() noexcept;
 
 	/**
 	 * Reset the filter's state, e.g. drop/flush buffers.
 	 */
-	void Reset();
+	void Reset() noexcept;
 
 	/**
 	 * Converts PCM data between two audio formats.
diff --git a/src/pcm/PcmDither.cxx b/src/pcm/PcmDither.cxx
index 55389e8c9..71616c2e4 100644
--- a/src/pcm/PcmDither.cxx
+++ b/src/pcm/PcmDither.cxx
@@ -24,7 +24,7 @@
 
 template<typename T, T MIN, T MAX, unsigned scale_bits>
 inline T
-PcmDither::Dither(T sample)
+PcmDither::Dither(T sample) noexcept
 {
 	constexpr T round = 1 << (scale_bits - 1);
 	constexpr T mask = (1 << scale_bits) - 1;
@@ -64,7 +64,7 @@ PcmDither::Dither(T sample)
 
 template<typename ST, unsigned SBITS, unsigned DBITS>
 inline ST
-PcmDither::DitherShift(ST sample)
+PcmDither::DitherShift(ST sample) noexcept
 {
 	static_assert(sizeof(ST) * 8 > SBITS, "Source type too small");
 	static_assert(SBITS > DBITS, "Non-positive scale_bits");
@@ -77,7 +77,7 @@ PcmDither::DitherShift(ST sample)
 
 template<typename ST, typename DT>
 inline typename DT::value_type
-PcmDither::DitherConvert(typename ST::value_type sample)
+PcmDither::DitherConvert(typename ST::value_type sample) noexcept
 {
 	static_assert(ST::BITS > DT::BITS,
 		      "Sample formats cannot be dithered");
@@ -92,7 +92,7 @@ template<typename ST, typename DT>
 inline void
 PcmDither::DitherConvert(typename DT::pointer_type dest,
 			 typename ST::const_pointer_type src,
-			 typename ST::const_pointer_type src_end)
+			 typename ST::const_pointer_type src_end) noexcept
 {
 	while (src < src_end)
 		*dest++ = DitherConvert<ST, DT>(*src++);
@@ -100,7 +100,7 @@ PcmDither::DitherConvert(typename DT::pointer_type dest,
 
 inline void
 PcmDither::Dither24To16(int16_t *dest, const int32_t *src,
-			const int32_t *src_end)
+			const int32_t *src_end) noexcept
 {
 	typedef SampleTraits<SampleFormat::S24_P32> ST;
 	typedef SampleTraits<SampleFormat::S16> DT;
@@ -109,7 +109,7 @@ PcmDither::Dither24To16(int16_t *dest, const int32_t *src,
 
 inline void
 PcmDither::Dither32To16(int16_t *dest, const int32_t *src,
-			const int32_t *src_end)
+			const int32_t *src_end) noexcept
 {
 	typedef SampleTraits<SampleFormat::S32> ST;
 	typedef SampleTraits<SampleFormat::S16> DT;
diff --git a/src/pcm/PcmDither.hxx b/src/pcm/PcmDither.hxx
index cf64b8534..21e86a5f3 100644
--- a/src/pcm/PcmDither.hxx
+++ b/src/pcm/PcmDither.hxx
@@ -29,7 +29,7 @@ class PcmDither {
 	int32_t random;
 
 public:
-	constexpr PcmDither()
+	constexpr PcmDither() noexcept
 		:error{0, 0, 0}, random(0) {}
 
 	/**
@@ -42,13 +42,13 @@ public:
 	 * @param sample the input sample value
 	 */
 	template<typename ST, unsigned SBITS, unsigned DBITS>
-	ST DitherShift(ST sample);
+	ST DitherShift(ST sample) noexcept;
 
 	void Dither24To16(int16_t *dest, const int32_t *src,
-			  const int32_t *src_end);
+			  const int32_t *src_end) noexcept;
 
 	void Dither32To16(int16_t *dest, const int32_t *src,
-			  const int32_t *src_end);
+			  const int32_t *src_end) noexcept;
 
 private:
 	/**
@@ -62,7 +62,7 @@ private:
 	 * @param sample the input sample value
 	 */
 	template<typename T, T MIN, T MAX, unsigned scale_bits>
-	T Dither(T sample);
+	T Dither(T sample) noexcept;
 
 	/**
 	 * Convert the given sample from one sample format to another,
@@ -73,12 +73,12 @@ private:
 	 * @param sample the input sample value
 	 */
 	template<typename ST, typename DT>
-	typename DT::value_type DitherConvert(typename ST::value_type sample);
+	typename DT::value_type DitherConvert(typename ST::value_type sample) noexcept;
 
 	template<typename ST, typename DT>
 	void DitherConvert(typename DT::pointer_type dest,
 			   typename ST::const_pointer_type src,
-			   typename ST::const_pointer_type src_end);
+			   typename ST::const_pointer_type src_end) noexcept;
 };
 
 #endif
diff --git a/src/pcm/PcmDsd.cxx b/src/pcm/PcmDsd.cxx
index 6e6b24c1e..7c46c5456 100644
--- a/src/pcm/PcmDsd.cxx
+++ b/src/pcm/PcmDsd.cxx
@@ -24,12 +24,12 @@
 
 #include <assert.h>
 
-PcmDsd::PcmDsd()
+PcmDsd::PcmDsd() noexcept
 {
 	dsd2pcm.fill(nullptr);
 }
 
-PcmDsd::~PcmDsd()
+PcmDsd::~PcmDsd() noexcept
 {
 	for (auto i : dsd2pcm)
 		if (i != nullptr)
@@ -37,7 +37,7 @@ PcmDsd::~PcmDsd()
 }
 
 void
-PcmDsd::Reset()
+PcmDsd::Reset() noexcept
 {
 	for (auto i : dsd2pcm)
 		if (i != nullptr)
@@ -45,7 +45,7 @@ PcmDsd::Reset()
 }
 
 ConstBuffer<float>
-PcmDsd::ToFloat(unsigned channels, ConstBuffer<uint8_t> src)
+PcmDsd::ToFloat(unsigned channels, ConstBuffer<uint8_t> src) noexcept
 {
 	assert(!src.IsNull());
 	assert(!src.empty());
diff --git a/src/pcm/PcmDsd.hxx b/src/pcm/PcmDsd.hxx
index ec6e041f1..64e093a24 100644
--- a/src/pcm/PcmDsd.hxx
+++ b/src/pcm/PcmDsd.hxx
@@ -39,13 +39,13 @@ class PcmDsd {
 	std::array<struct dsd2pcm_ctx_s *, MAX_CHANNELS> dsd2pcm;
 
 public:
-	PcmDsd();
-	~PcmDsd();
+	PcmDsd() noexcept;
+	~PcmDsd() noexcept;
 
-	void Reset();
+	void Reset() noexcept;
 
 	ConstBuffer<float> ToFloat(unsigned channels,
-				   ConstBuffer<uint8_t> src);
+				   ConstBuffer<uint8_t> src) noexcept;
 };
 
 #endif
diff --git a/src/pcm/PcmMix.cxx b/src/pcm/PcmMix.cxx
index ae859dbf4..2af4f3dac 100644
--- a/src/pcm/PcmMix.cxx
+++ b/src/pcm/PcmMix.cxx
@@ -33,7 +33,7 @@ template<SampleFormat F, class Traits=SampleTraits<F>>
 static typename Traits::value_type
 PcmAddVolume(PcmDither &dither,
 	     typename Traits::value_type _a, typename Traits::value_type _b,
-	     int volume1, int volume2)
+	     int volume1, int volume2) noexcept
 {
 	typename Traits::long_type a(_a), b(_b);
 	typename Traits::long_type c(a * volume1 + b * volume2);
@@ -48,7 +48,7 @@ static void
 PcmAddVolume(PcmDither &dither,
 	     typename Traits::pointer_type a,
 	     typename Traits::const_pointer_type b,
-	     size_t n, int volume1, int volume2)
+	     size_t n, int volume1, int volume2) noexcept
 {
 	for (size_t i = 0; i != n; ++i)
 		a[i] = PcmAddVolume<F, Traits>(dither, a[i], b[i],
@@ -58,7 +58,8 @@ PcmAddVolume(PcmDither &dither,
 template<SampleFormat F, class Traits=SampleTraits<F>>
 static void
 PcmAddVolumeVoid(PcmDither &dither,
-		 void *a, const void *b, size_t size, int volume1, int volume2)
+		 void *a, const void *b, size_t size,
+		 int volume1, int volume2) noexcept
 {
 	constexpr size_t sample_size = Traits::SAMPLE_SIZE;
 	assert(size % sample_size == 0);
@@ -72,7 +73,7 @@ PcmAddVolumeVoid(PcmDither &dither,
 
 static void
 pcm_add_vol_float(float *buffer1, const float *buffer2,
-		  unsigned num_samples, float volume1, float volume2)
+		  unsigned num_samples, float volume1, float volume2) noexcept
 {
 	while (num_samples > 0) {
 		float sample1 = *buffer1;
@@ -87,7 +88,7 @@ pcm_add_vol_float(float *buffer1, const float *buffer2,
 static bool
 pcm_add_vol(PcmDither &dither, void *buffer1, const void *buffer2, size_t size,
 	    int vol1, int vol2,
-	    SampleFormat format)
+	    SampleFormat format) noexcept
 {
 	switch (format) {
 	case SampleFormat::UNDEFINED:
@@ -133,7 +134,7 @@ pcm_add_vol(PcmDither &dither, void *buffer1, const void *buffer2, size_t size,
 
 template<SampleFormat F, class Traits=SampleTraits<F>>
 static typename Traits::value_type
-PcmAdd(typename Traits::value_type _a, typename Traits::value_type _b)
+PcmAdd(typename Traits::value_type _a, typename Traits::value_type _b) noexcept
 {
 	typename Traits::sum_type a(_a), b(_b);
 
@@ -144,7 +145,7 @@ template<SampleFormat F, class Traits=SampleTraits<F>>
 static void
 PcmAdd(typename Traits::pointer_type a,
        typename Traits::const_pointer_type b,
-       size_t n)
+       size_t n) noexcept
 {
 	for (size_t i = 0; i != n; ++i)
 		a[i] = PcmAdd<F, Traits>(a[i], b[i]);
@@ -152,7 +153,7 @@ PcmAdd(typename Traits::pointer_type a,
 
 template<SampleFormat F, class Traits=SampleTraits<F>>
 static void
-PcmAddVoid(void *a, const void *b, size_t size)
+PcmAddVoid(void *a, const void *b, size_t size) noexcept
 {
 	constexpr size_t sample_size = Traits::SAMPLE_SIZE;
 	assert(size % sample_size == 0);
@@ -163,7 +164,8 @@ PcmAddVoid(void *a, const void *b, size_t size)
 }
 
 static void
-pcm_add_float(float *buffer1, const float *buffer2, unsigned num_samples)
+pcm_add_float(float *buffer1, const float *buffer2,
+	      unsigned num_samples) noexcept
 {
 	while (num_samples > 0) {
 		float sample1 = *buffer1;
@@ -175,7 +177,7 @@ pcm_add_float(float *buffer1, const float *buffer2, unsigned num_samples)
 
 static bool
 pcm_add(void *buffer1, const void *buffer2, size_t size,
-	SampleFormat format)
+	SampleFormat format) noexcept
 {
 	switch (format) {
 	case SampleFormat::UNDEFINED:
@@ -211,7 +213,7 @@ pcm_add(void *buffer1, const void *buffer2, size_t size,
 
 bool
 pcm_mix(PcmDither &dither, void *buffer1, const void *buffer2, size_t size,
-	SampleFormat format, float portion1)
+	SampleFormat format, float portion1) noexcept
 {
 	float s;
 
diff --git a/src/pcm/PcmMix.hxx b/src/pcm/PcmMix.hxx
index 9906d8920..7f08a9409 100644
--- a/src/pcm/PcmMix.hxx
+++ b/src/pcm/PcmMix.hxx
@@ -47,6 +47,6 @@ class PcmDither;
 gcc_warn_unused_result
 bool
 pcm_mix(PcmDither &dither, void *buffer1, const void *buffer2, size_t size,
-	SampleFormat format, float portion1);
+	SampleFormat format, float portion1) noexcept;
 
 #endif
diff --git a/src/pcm/PcmPrng.hxx b/src/pcm/PcmPrng.hxx
index 103263388..89980c46f 100644
--- a/src/pcm/PcmPrng.hxx
+++ b/src/pcm/PcmPrng.hxx
@@ -25,7 +25,7 @@
  * dithering.
  */
 constexpr static inline unsigned long
-pcm_prng(unsigned long state)
+pcm_prng(unsigned long state) noexcept
 {
 	return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL;
 }
diff --git a/src/pcm/Resampler.hxx b/src/pcm/Resampler.hxx
index 26d5014da..485450acc 100644
--- a/src/pcm/Resampler.hxx
+++ b/src/pcm/Resampler.hxx
@@ -52,12 +52,12 @@ public:
 	 * Closes the resampler.  After that, you may call Open()
 	 * again.
 	 */
-	virtual void Close() = 0;
+	virtual void Close() noexcept = 0;
 
 	/**
 	 * Reset the filter's state, e.g. drop/flush buffers.
 	 */
-	virtual void Reset() {
+	virtual void Reset() noexcept {
 	}
 
 	/**
diff --git a/src/pcm/SampleFormat.hxx b/src/pcm/SampleFormat.hxx
index 408357825..405add4e5 100644
--- a/src/pcm/SampleFormat.hxx
+++ b/src/pcm/SampleFormat.hxx
@@ -68,7 +68,7 @@ enum class SampleFormat : uint8_t {
 constexpr
 #endif
 static inline bool
-audio_valid_sample_format(SampleFormat format)
+audio_valid_sample_format(SampleFormat format) noexcept
 {
 	switch (format) {
 	case SampleFormat::S8:
@@ -90,7 +90,7 @@ audio_valid_sample_format(SampleFormat format)
 constexpr
 #endif
 static inline unsigned
-sample_format_size(SampleFormat format)
+sample_format_size(SampleFormat format) noexcept
 {
 	switch (format) {
 	case SampleFormat::S8:
diff --git a/src/pcm/ShiftConvert.hxx b/src/pcm/ShiftConvert.hxx
index c033a7ac2..ce46d2089 100644
--- a/src/pcm/ShiftConvert.hxx
+++ b/src/pcm/ShiftConvert.hxx
@@ -39,7 +39,7 @@ struct LeftShiftSampleConvert {
 	static_assert(SrcTraits::BITS < DstTraits::BITS,
 		      "Source format must be smaller than destination format");
 
-	constexpr static DV Convert(SV src) {
+	constexpr static DV Convert(SV src) noexcept {
 		return DV(src) << (DstTraits::BITS - SrcTraits::BITS);
 	}
 };
@@ -61,7 +61,7 @@ struct RightShiftSampleConvert {
 	static_assert(SrcTraits::BITS > DstTraits::BITS,
 		      "Source format must be smaller than destination format");
 
-	constexpr static DV Convert(SV src) {
+	constexpr static DV Convert(SV src) noexcept {
 		return src >> (SrcTraits::BITS - DstTraits::BITS);
 	}
 };
diff --git a/src/pcm/Silence.cxx b/src/pcm/Silence.cxx
index babcb2408..4d4cc345b 100644
--- a/src/pcm/Silence.cxx
+++ b/src/pcm/Silence.cxx
@@ -26,7 +26,7 @@
 #include <string.h>
 
 void
-PcmSilence(WritableBuffer<void> dest, SampleFormat format)
+PcmSilence(WritableBuffer<void> dest, SampleFormat format) noexcept
 {
 	uint8_t pattern = 0;
 	if (format == SampleFormat::DSD)
diff --git a/src/pcm/Silence.hxx b/src/pcm/Silence.hxx
index b225572c2..cadba81b0 100644
--- a/src/pcm/Silence.hxx
+++ b/src/pcm/Silence.hxx
@@ -31,6 +31,6 @@ enum class SampleFormat : uint8_t;
  * Fill the given buffer with the format-specific silence pattern.
  */
 void
-PcmSilence(WritableBuffer<void> dest, SampleFormat format);
+PcmSilence(WritableBuffer<void> dest, SampleFormat format) noexcept;
 
 #endif
diff --git a/src/pcm/SoxrResampler.cxx b/src/pcm/SoxrResampler.cxx
index 621d3f970..0c887cbdd 100644
--- a/src/pcm/SoxrResampler.cxx
+++ b/src/pcm/SoxrResampler.cxx
@@ -134,7 +134,7 @@ SoxrPcmResampler::Open(AudioFormat &af, unsigned new_sample_rate)
 }
 
 void
-SoxrPcmResampler::Close()
+SoxrPcmResampler::Close() noexcept
 {
 	soxr_delete(soxr);
 }
diff --git a/src/pcm/SoxrResampler.hxx b/src/pcm/SoxrResampler.hxx
index 0be861179..ee4b98869 100644
--- a/src/pcm/SoxrResampler.hxx
+++ b/src/pcm/SoxrResampler.hxx
@@ -40,7 +40,7 @@ class SoxrPcmResampler final : public PcmResampler {
 
 public:
 	AudioFormat Open(AudioFormat &af, unsigned new_sample_rate) override;
-	void Close() override;
+	void Close() noexcept override;
 	ConstBuffer<void> Resample(ConstBuffer<void> src) override;
 };
 
diff --git a/src/pcm/Volume.cxx b/src/pcm/Volume.cxx
index 97356e4d1..282135bb6 100644
--- a/src/pcm/Volume.cxx
+++ b/src/pcm/Volume.cxx
@@ -35,7 +35,7 @@ template<SampleFormat F, class Traits=SampleTraits<F>>
 static inline typename Traits::value_type
 pcm_volume_sample(PcmDither &dither,
 		  typename Traits::value_type _sample,
-		  int volume)
+		  int volume) noexcept
 {
 	typename Traits::long_type sample(_sample);
 
@@ -50,7 +50,7 @@ pcm_volume_change(PcmDither &dither,
 		  typename Traits::pointer_type dest,
 		  typename Traits::const_pointer_type src,
 		  size_t n,
-		  int volume)
+		  int volume) noexcept
 {
 	for (size_t i = 0; i != n; ++i)
 		dest[i] = pcm_volume_sample<F, Traits>(dither, src[i], volume);
@@ -59,7 +59,7 @@ pcm_volume_change(PcmDither &dither,
 static void
 pcm_volume_change_8(PcmDither &dither,
 		    int8_t *dest, const int8_t *src, size_t n,
-		    int volume)
+		    int volume) noexcept
 {
 	pcm_volume_change<SampleFormat::S8>(dither, dest, src, n, volume);
 }
@@ -67,7 +67,7 @@ pcm_volume_change_8(PcmDither &dither,
 static void
 pcm_volume_change_16(PcmDither &dither,
 		     int16_t *dest, const int16_t *src, size_t n,
-		     int volume)
+		     int volume) noexcept
 {
 	pcm_volume_change<SampleFormat::S16>(dither, dest, src, n, volume);
 }
@@ -75,7 +75,7 @@ pcm_volume_change_16(PcmDither &dither,
 static void
 pcm_volume_change_24(PcmDither &dither,
 		     int32_t *dest, const int32_t *src, size_t n,
-		     int volume)
+		     int volume) noexcept
 {
 	pcm_volume_change<SampleFormat::S24_P32>(dither, dest, src, n,
 						 volume);
@@ -84,14 +84,14 @@ pcm_volume_change_24(PcmDither &dither,
 static void
 pcm_volume_change_32(PcmDither &dither,
 		     int32_t *dest, const int32_t *src, size_t n,
-		     int volume)
+		     int volume) noexcept
 {
 	pcm_volume_change<SampleFormat::S32>(dither, dest, src, n, volume);
 }
 
 static void
 pcm_volume_change_float(float *dest, const float *src, size_t n,
-			float volume)
+			float volume) noexcept
 {
 	for (size_t i = 0; i != n; ++i)
 		dest[i] = src[i] * volume;
diff --git a/src/pcm/Volume.hxx b/src/pcm/Volume.hxx
index 6a1ffde83..a40852209 100644
--- a/src/pcm/Volume.hxx
+++ b/src/pcm/Volume.hxx
@@ -45,14 +45,14 @@ static constexpr int PCM_VOLUME_1S = PCM_VOLUME_1;
  * Converts a float value (0.0 = silence, 1.0 = 100% volume) to an
  * integer volume value (1000 = 100%).
  */
-static inline int
-pcm_float_to_volume(float volume)
+static constexpr inline int
+pcm_float_to_volume(float volume) noexcept
 {
 	return volume * PCM_VOLUME_1 + 0.5;
 }
 
-static inline float
-pcm_volume_to_float(int volume)
+static constexpr inline float
+pcm_volume_to_float(int volume) noexcept
 {
 	return (float)volume / (float)PCM_VOLUME_1;
 }
@@ -69,14 +69,14 @@ class PcmVolume {
 	PcmDither dither;
 
 public:
-	PcmVolume()
+	PcmVolume() noexcept
 		:volume(PCM_VOLUME_1) {
 #ifndef NDEBUG
 		format = SampleFormat::UNDEFINED;
 #endif
 	}
 
-	unsigned GetVolume() const {
+	unsigned GetVolume() const noexcept {
 		return volume;
 	}
 
@@ -85,7 +85,7 @@ public:
 	 * [0..#PCM_VOLUME_1]; may be bigger than #PCM_VOLUME_1, but
 	 * then it will most likely clip a lot
 	 */
-	void SetVolume(unsigned _volume) {
+	void SetVolume(unsigned _volume) noexcept {
 		volume = _volume;
 	}
 
@@ -101,7 +101,7 @@ public:
 	/**
 	 * Closes the object.  After that, you may call Open() again.
 	 */
-	void Close() {
+	void Close() noexcept {
 #ifndef NDEBUG
 		assert(format != SampleFormat::UNDEFINED);
 		format = SampleFormat::UNDEFINED;