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LibAudio: Use specified bit depth directly

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We report a rounded up PCM sample format to the outside, but use the
exact bit depth as specified in header and frames.

This makes the three FLAC spec tests with a a bit depth of 20 pass.
This commit is contained in:
kleines Filmröllchen 2023-03-14 19:24:18 +01:00 • committed by Linus Groh
parent a2d13c47bd
commit b2a018ee59
3 changed files with 36 additions and 29 deletions
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10
Userland/Libraries/LibAudio/FlacLoader.h
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@ -85,14 +85,16 @@ private:
// Converters for special coding used in frame headers
ALWAYS_INLINE ErrorOr<u32, LoaderError> convert_sample_count_code(u8 sample_count_code);
ALWAYS_INLINE ErrorOr<u32, LoaderError> convert_sample_rate_code(u8 sample_rate_code);
ALWAYS_INLINE ErrorOr<PcmSampleFormat, LoaderError> convert_bit_depth_code(u8 bit_depth_code);
ALWAYS_INLINE ErrorOr<u8, LoaderError> convert_bit_depth_code(u8 bit_depth_code);
bool should_insert_seekpoint_at(u64 sample_index) const;
// Data obtained directly from the FLAC metadata: many values have specific bit counts
u32 m_sample_rate { 0 }; // 20 bit
u8 m_num_channels { 0 }; // 3 bit
PcmSampleFormat m_sample_format; // 5 bits for the integer bit depth
u32 m_sample_rate { 0 }; // 20 bit
u8 m_num_channels { 0 }; // 3 bit
u8 m_bits_per_sample { 0 }; // 5 bits for the integer bit depth
// Externally visible format; the smallest integer format that's larger than the precise bit depth.
PcmSampleFormat m_sample_format;
// Blocks are units of decoded audio data
u16 m_min_block_size { 0 };
u16 m_max_block_size { 0 };