pcm/Export: add GetInputBlockSize(), GetOutputBlockSize()

src/pcm/Dop.hxx

@@ -46,6 +46,20 @@ public:
 		rest_buffer.Reset();
 	}
 
+	/**
+	 * @return the size of one input block in bytes
+	 */
+	size_t GetInputBlockSize() const noexcept {
+		return rest_buffer.GetInputBlockSize();
+	}
+
+	/**
+	 * @return the size of one output block in bytes
+	 */
+	size_t GetOutputBlockSize() const noexcept {
+		return 2 * GetInputBlockSize();
+	}
+
 	ConstBuffer<uint32_t> Convert(ConstBuffer<uint8_t> src) noexcept;
 };
 

src/pcm/Dsd16.hxx

@@ -44,6 +44,20 @@ public:
 		rest_buffer.Reset();
 	}
 
+	/**
+	 * @return the size of one input block in bytes
+	 */
+	size_t GetInputBlockSize() const noexcept {
+		return rest_buffer.GetInputBlockSize();
+	}
+
+	/**
+	 * @return the size of one output block in bytes
+	 */
+	size_t GetOutputBlockSize() const noexcept {
+		return GetInputBlockSize();
+	}
+
 	ConstBuffer<uint16_t> Convert(ConstBuffer<uint8_t> src) noexcept;
 };
 

src/pcm/Dsd32.hxx

@@ -44,6 +44,20 @@ public:
 		rest_buffer.Reset();
 	}
 
+	/**
+	 * @return the size of one input block in bytes
+	 */
+	size_t GetInputBlockSize() const noexcept {
+		return rest_buffer.GetInputBlockSize();
+	}
+
+	/**
+	 * @return the size of one output block in bytes
+	 */
+	size_t GetOutputBlockSize() const noexcept {
+		return GetInputBlockSize();
+	}
+
 	ConstBuffer<uint32_t> Convert(ConstBuffer<uint8_t> src) noexcept;
 };
 

src/pcm/Export.cxx

@@ -144,6 +144,52 @@ PcmExport::GetOutputFrameSize() const noexcept
 	return GetInputFrameSize();
 }
 
+size_t
+PcmExport::GetInputBlockSize() const noexcept
+{
+#ifdef ENABLE_DSD
+	switch (dsd_mode) {
+	case DsdMode::NONE:
+		break;
+
+	case DsdMode::U16:
+		return dsd16_converter.GetInputBlockSize();
+
+	case DsdMode::U32:
+		return dsd32_converter.GetInputBlockSize();
+		break;
+
+	case DsdMode::DOP:
+		return dop_converter.GetInputBlockSize();
+	}
+#endif
+
+	return GetInputFrameSize();
+}
+
+size_t
+PcmExport::GetOutputBlockSize() const noexcept
+{
+#ifdef ENABLE_DSD
+	switch (dsd_mode) {
+	case DsdMode::NONE:
+		break;
+
+	case DsdMode::U16:
+		return dsd16_converter.GetOutputBlockSize();
+
+	case DsdMode::U32:
+		return dsd32_converter.GetOutputBlockSize();
+		break;
+
+	case DsdMode::DOP:
+		return dop_converter.GetOutputBlockSize();
+	}
+#endif
+
+	return GetOutputFrameSize();
+}
+
 unsigned
 PcmExport::Params::CalcOutputSampleRate(unsigned sample_rate) const noexcept
 {

src/pcm/Export.hxx

@@ -199,6 +199,18 @@ public:
 	size_t GetOutputFrameSize() const noexcept;
 
 	/**
+	 * @return the size of one input block in bytes
+	 */
+	gcc_pure
+	size_t GetInputBlockSize() const noexcept;
+
+	/**
+	 * @return the size of one output block in bytes
+	 */
+	gcc_pure
+	size_t GetOutputBlockSize() const noexcept;
+
+	/**
 	 * Export a PCM buffer.
 	 *
 	 * @param src the source PCM buffer

src/pcm/RestBuffer.hxx

@@ -48,6 +48,13 @@ public:
 		size = 0;
 	}
 
+	/**
+	 * @return the size of one input block in #T samples
+	 */
+	size_t GetInputBlockSize() const noexcept {
+		return capacity;
+	}
+
 	unsigned GetChannelCount() const noexcept {
 		return capacity / n_frames;
 	}