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LibAudio: Read FLAC MD5 directly into the class member

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Tim Schumacher 2023-03-01 15:56:55 +01:00 committed by Linus Groh
parent 26ba195cf6
commit 424df62b00
Notes: sideshowbarker 2024-07-17 02:21:14 +09:00 
Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/424df62b00
Pull-request: https://github.com/SerenityOS/serenity/pull/17684
Reviewed-by: https://github.com/JanDeVisser ✅
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg ✅
1 changed files with 5 additions and 15 deletions
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20
Userland/Libraries/LibAudio/FlacLoader.cpp
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@ -108,13 +108,9 @@ MaybeLoaderError FlacLoaderPlugin::parse_header()
m_total_samples = LOADER_TRY(streaminfo_data.read_bits<u64>(36));
FLAC_VERIFY(m_total_samples > 0, LoaderError::Category::Format, "Number of samples is zero");
// Parse checksum into a buffer first
[[maybe_unused]] u128 md5_checksum;
VERIFY(streaminfo_data.is_aligned_to_byte_boundary());
// FIXME: This should read the entire span.
auto md5_bytes_read = LOADER_TRY(streaminfo_data.read_some(md5_checksum.bytes()));
FLAC_VERIFY(md5_bytes_read.size() == sizeof(md5_checksum), LoaderError::Category::IO, "MD5 Checksum size");
md5_checksum.bytes().copy_to({ m_md5_checksum, sizeof(m_md5_checksum) });
LOADER_TRY(streaminfo_data.read_until_filled({ m_md5_checksum, sizeof(m_md5_checksum) }));
// Parse other blocks
[[maybe_unused]] u16 meta_blocks_parsed = 1;
@ -142,7 +138,7 @@ MaybeLoaderError FlacLoaderPlugin::parse_header()
++total_meta_blocks;
}
dbgln_if(AFLACLOADER_DEBUG, "Parsed FLAC header: blocksize {}-{}{}, framesize {}-{}, {}Hz, {}bit, {} channels, {} samples total ({:.2f}s), MD5 {}, data start at {:x} bytes, {} headers total (skipped {})", m_min_block_size, m_max_block_size, is_fixed_blocksize_stream() ? " (constant)" : "", m_min_frame_size, m_max_frame_size, m_sample_rate, pcm_bits_per_sample(m_sample_format), m_num_channels, m_total_samples, static_cast<float>(m_total_samples) / static_cast<float>(m_sample_rate), md5_checksum, m_data_start_location, total_meta_blocks, total_meta_blocks - meta_blocks_parsed);
dbgln_if(AFLACLOADER_DEBUG, "Parsed FLAC header: blocksize {}-{}{}, framesize {}-{}, {}Hz, {}bit, {} channels, {} samples total ({:.2f}s), MD5 {}, data start at {:x} bytes, {} headers total (skipped {})", m_min_block_size, m_max_block_size, is_fixed_blocksize_stream() ? " (constant)" : "", m_min_frame_size, m_max_frame_size, m_sample_rate, pcm_bits_per_sample(m_sample_format), m_num_channels, m_total_samples, static_cast<float>(m_total_samples) / static_cast<float>(m_sample_rate), m_md5_checksum, m_data_start_location, total_meta_blocks, total_meta_blocks - meta_blocks_parsed);
return {};
}
@ -869,11 +865,7 @@ ALWAYS_INLINE ErrorOr<i32> decode_unsigned_exp_golomb(u8 k, BigEndianInputBitStr
ErrorOr<u64> read_utf8_char(BigEndianInputBitStream& input)
{
u64 character;
u8 buffer = 0;
Bytes buffer_bytes { &buffer, 1 };
// FIXME: This should read the entire span.
TRY(input.read_some(buffer_bytes));
u8 start_byte = buffer_bytes[0];
u8 start_byte = TRY(input.read_value<u8>());
// Signal byte is zero: ASCII character
if ((start_byte & 0b10000000) == 0) {
return start_byte;
@ -888,9 +880,7 @@ ErrorOr<u64> read_utf8_char(BigEndianInputBitStream& input)
u8 start_byte_bitmask = AK::exp2(bits_from_start_byte) - 1;
character = start_byte_bitmask & start_byte;
for (u8 i = length - 1; i > 0; --i) {
// FIXME: This should read the entire span.
TRY(input.read_some(buffer_bytes));
u8 current_byte = buffer_bytes[0];
u8 current_byte = TRY(input.read_value<u8>());
character = (character << 6) | (current_byte & 0b00111111);
}
return character;