pile-audio refactor

crates/pile-flac/src/reader/block.rs

@@ -0,0 +1,63 @@
+use std::io::Write;
+
+use crate::{
+	FlacDecodeError, FlacEncodeError,
+	blocks::{
+		FlacApplicationBlock, FlacAudioFrame, FlacCommentBlock, FlacCuesheetBlock,
+		FlacMetablockDecode, FlacMetablockEncode, FlacMetablockType, FlacPaddingBlock,
+		FlacPictureBlock, FlacSeektableBlock, FlacStreaminfoBlock,
+	},
+};
+
+#[derive(Debug)]
+#[expect(missing_docs)]
+pub enum FlacBlock {
+	Streaminfo(FlacStreaminfoBlock),
+	Picture(FlacPictureBlock),
+	Padding(FlacPaddingBlock),
+	Application(FlacApplicationBlock),
+	SeekTable(FlacSeektableBlock),
+	VorbisComment(FlacCommentBlock),
+	CueSheet(FlacCuesheetBlock),
+	AudioFrame(FlacAudioFrame),
+}
+
+impl FlacBlock {
+	/// Encode this block
+	pub fn encode(
+		&self,
+		is_last: bool,
+		with_header: bool,
+		target: &mut impl Write,
+	) -> Result<(), FlacEncodeError> {
+		match self {
+			Self::Streaminfo(b) => b.encode(is_last, with_header, target),
+			Self::SeekTable(b) => b.encode(is_last, with_header, target),
+			Self::Picture(b) => b.encode(is_last, with_header, target),
+			Self::Padding(b) => b.encode(is_last, with_header, target),
+			Self::Application(b) => b.encode(is_last, with_header, target),
+			Self::VorbisComment(b) => b.encode(is_last, with_header, target),
+			Self::CueSheet(b) => b.encode(is_last, with_header, target),
+			Self::AudioFrame(b) => b.encode(target),
+		}
+	}
+
+	/// Try to decode the given data as a block
+	pub fn decode(block_type: FlacMetablockType, data: &[u8]) -> Result<Self, FlacDecodeError> {
+		Ok(match block_type {
+			FlacMetablockType::Streaminfo => {
+				FlacBlock::Streaminfo(FlacStreaminfoBlock::decode(data)?)
+			}
+			FlacMetablockType::Application => {
+				FlacBlock::Application(FlacApplicationBlock::decode(data)?)
+			}
+			FlacMetablockType::Cuesheet => FlacBlock::CueSheet(FlacCuesheetBlock::decode(data)?),
+			FlacMetablockType::Padding => FlacBlock::Padding(FlacPaddingBlock::decode(data)?),
+			FlacMetablockType::Picture => FlacBlock::Picture(FlacPictureBlock::decode(data)?),
+			FlacMetablockType::Seektable => FlacBlock::SeekTable(FlacSeektableBlock::decode(data)?),
+			FlacMetablockType::VorbisComment => {
+				FlacBlock::VorbisComment(FlacCommentBlock::decode(data)?)
+			}
+		})
+	}
+}