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LibAudio: Write FLAC metadata

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This includes a generalization of the metadata block infrastructure, so
adding and writing blocks is handled in a generalized fashion.
This commit is contained in:
kleines Filmröllchen 2023-08-18 22:38:01 +02:00 • committed by Andrew Kaster
parent fc2301c23c
commit bf3fa19314
2 changed files with 61 additions and 5 deletions
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11
Userland/Libraries/LibAudio/FlacWriter.h
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@ -13,6 +13,8 @@
#include <AK/StringView.h>
#include <LibAudio/Encoder.h>
#include <LibAudio/FlacTypes.h>
#include <LibAudio/Forward.h>
#include <LibAudio/GenericTypes.h>
#include <LibAudio/Sample.h>
#include <LibAudio/SampleFormats.h>
#include <LibCore/Forward.h>
@ -80,6 +82,9 @@ public:
ErrorOr<void> set_num_channels(u8 num_channels);
ErrorOr<void> set_sample_rate(u32 sample_rate);
ErrorOr<void> set_bits_per_sample(u16 bits_per_sample);
virtual ErrorOr<void> set_metadata(Metadata const& metadata) override;
ErrorOr<void> finalize_header_format();
private:
@ -98,6 +103,9 @@ private:
// In this case, an empty Optional is returned.
ErrorOr<Optional<FlacLPCEncodedSubframe>> encode_fixed_lpc(FlacFixedLPC order, ReadonlySpan<i64> subframe, size_t current_min_cost, u8 bits_per_sample);
ErrorOr<void> add_metadata_block(FlacRawMetadataBlock block, Optional<size_t> insertion_index = {});
ErrorOr<void> write_metadata_block(FlacRawMetadataBlock const& block);
NonnullOwnPtr<SeekableStream> m_stream;
WriteState m_state { WriteState::HeaderUnwritten };
@ -114,6 +122,9 @@ private:
size_t m_sample_count { 0 };
// Remember where the STREAMINFO block was written in the stream.
size_t m_streaminfo_start_index;
// Raw metadata blocks that will be written out before header finalization.
Vector<FlacRawMetadataBlock> m_cached_metadata_blocks;
};
}