Improve handling of AIFF-C compression type

[AkiyukiOkayasu]

In pacmog v0.4.2, the following AIFF-C compression types were supported:

pacmog/src/aiff.rs

Lines 72 to 77 in 80de8c2

	b"NONE" => Ok(CompressionTypeId::None),
	b"sowt" => Ok(CompressionTypeId::Sowt),
	b"fl32" => Ok(CompressionTypeId::FL32),
	b"FL32" => Ok(CompressionTypeId::FL32),
	b"fl64" => Ok(CompressionTypeId::FL64),
	b"FL64" => Ok(CompressionTypeId::FL64),

These types are compatible with most commonly used AIFF files. However, they are insufficient for certain edge cases:

• twos (16bit big endian)
• in24 (24bit big endian)
• in32 (32bit big endian)
• 42ni (24bit little endian)
• 23ni (32bit little endian)

Related issues:

• Big endian AIFF decoding issue #35
• AIFF-C "in32" uncompressed 32-bit big-endian signed integer is not supported #38
• AIFF-C "in24" uncompressed 24-bit big-endian signed integer is not supported #39
• AIFF-C "23ni" uncompressed 32-bit little-endian signed integer is not supported #40

Additionally, there are rare cases where the bit-depth specified in the COMMON chunk does not match the bit-depth assumed by the compression type:

• Quicktime 5 exported AIFF-C 32-bit and 64-bit floating point files fail #41

This PR improves the handling of AIFF-C compression types. If the compression type is present and not 'NONE', the bit-depth specified in the COMMON chunk is overwritten with the value corresponding to the compression type.

[AkiyukiOkayasu]

List of supported compression types.

pacmog/src/aiff.rs

Lines 154 to 170 in 6f05316

	fn aifc_compression_type(compression_type_id: &[u8]) -> Result<(AudioFormat, Option<u16>), ()> {
	let t = match compression_type_id {
	b"NONE" => (AudioFormat::LinearPcmBe, None),
	b"twos" => (AudioFormat::LinearPcmBe, Some(16)),
	b"sowt" => (AudioFormat::LinearPcmLe, Some(16)),
	b"fl32" => (AudioFormat::IeeeFloatBe, Some(32)),
	b"FL32" => (AudioFormat::IeeeFloatBe, Some(32)),
	b"fl64" => (AudioFormat::IeeeFloatBe, Some(64)),
	b"FL64" => (AudioFormat::IeeeFloatBe, Some(64)),
	b"in24" => (AudioFormat::LinearPcmBe, Some(24)),
	b"in32" => (AudioFormat::LinearPcmBe, Some(32)),
	b"42ni" => (AudioFormat::LinearPcmLe, Some(24)),
	b"23ni" => (AudioFormat::LinearPcmLe, Some(32)),
	_ => return Err(()), //Unknown compression type
	};
	Ok(t)
	}