pile-audio refactor

crates/pile-flac/tests/files/flac_faulty/LICENSE.txt

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crates/pile-flac/tests/files/flac_faulty/README.md

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+# Group faulty
+
+This group contains files with invalid data and corrupted files
+that might trigger crashes in a decoder. A decoder should not
+crash or freeze reading these files. Read the README.txt in
+the directory faulty for details on each file.
+
+
+## Manifest
+
+- File 01 has a streaminfo metadata block that lists the wrong
+  maximum blocksize for the file. The file has a fixed
+  blocksize of 16384 samples, but the streaminfo metadata block
+  says the maximum blocksize is 4096. When a decoder
+  initializes buffers for a blocksize of 4096 and tries to
+  decode a block with 16384 samples, it might overrun a buffer
+
+- File 02 has a streaminfo metadata block that lists the wrong
+  maximum framesize for the file. The file has an actual
+  maximum framesize of 8846 byte, but the streaminfo metadata
+  block says the maximum framesize is 654 byte. When a decoder
+  initializes buffers for a frames of at most 654 byte and
+  tries to read a frame of 8846 byte, it might overrun a buffer
+
+- File 03 has a streaminfo metadata block that lists the wrong
+  bit depth for the file. It says the bit depth is 24, but the
+  actual bit depth of all frames is 16.
+
+- File 04 has a streaminfo metadata block that lists the wrong
+  number of channels for the file. It says the number of
+  channels is 5, but the actual number of channels is 1.
+
+- File 05 has a streaminfo metadata block that lists the wrong
+  total number of samples. It says the number of samples is
+  39842, while the actual total number of samples is 109487
+
+- File 06 doesn't have a streaminfo metadata block, despite
+  having other metadata blocks, unlike the files 10 and 11 in
+  the 'uncommon' set of files, which start directly at a frame
+  header. It does have two other metadata blocks, a vorbis
+  comment block and a padding block
+
+- File 07 has a streaminfo metadata block that is not the first
+  metadata block of the file. It is being preceded by two other
+  metadata blocks, a vorbis comment block and a padding block
+
+- File 08 has a blocksize of 65536, which is representable by
+  the frame header but not by the streaminfo metadata block,
+  and is thus invalid
+
+- File 09 has a blocksize of 1, which is not allowed for all
+  but the last frame of a file
+
+- File 10 has a vorbis comment metadata block with invalid
+  contents. The block has a correct overall length and has a
+  single tag, but it states there are 10 tags, which means a
+  parser could overread the block if it does not check for
+  validity.
+
+- File 11 has an incorrect metadata block length, which leads
+  to the parser searching for the next metadata block reading
+  garbage.