rework Peppi format

Cargo.toml

@@ -1,19 +1,22 @@
 [package]
 name = "peppi-slp"
-version = "0.2.1"
+version = "0.3.0"
 authors = ["melkor <[email protected]>"]
 edition = "2021"
 
 [dependencies]
-arrow = "6.3"
+arrow2 = { git = "https://github.com/jorgecarleitao/arrow2.git", rev = "f75ce4266e04c4084fa5666c6c5ff5efd6b5036f", features = ["io_ipc", "io_ipc_write_async", "io_ipc_compression", "io_print"] }
 atty = "0.2"
-clap = "2.33"
+clap = { version = "3.2", features = ["cargo"] }
 env_logger = "0.9"
 log = "0.4"
-parquet = { version = "6.3", default-features = false, features = ["arrow", "base64"] }
-parquet-format = "4.0"
-peppi = "1.0.0-alpha.6"
-serde_json = "1.0"
+peekread = "0.1"
+peppi = { git = "https://github.com/hohav/peppi.git", rev = "961d95beea86b7d2800ee33f1e0d5f60f186454e" }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = { version = "1.0", features = ["preserve_order"] }
+tar = "0.4"
+tempfile = "3.3.0"
+xxhash-rust = { version = "0.8.5", features = ["xxh3"] }
 
 [profile.release]
 opt-level = 3

README.md

@@ -66,19 +66,22 @@ $ slp -s game.slp | jq
 }
 ```
 
-Convert a replay to Peppi format (**⚠️ experimental!**):
+Convert a replay to Peppi format:
 
 ```bash
-$ slp -f peppi -o foo game.slp
+$ slp -f peppi -o game.slpp game.slp
 ```
 
-This creates a directory `foo` with the following files:
-```
-start.json
-end.json
-metadata.json
-frames.parquet
-items.parquet
-```
+## Peppi format
+
+The Peppi format (.slpp) is a GNU tar archive containing the following files:
+
+- peppi.json
+- metadata.json
+- start.json
+- start.raw
+- end.json
+- end.raw
+- frames.arrow
 
-Frame and item data are stored in columnar [Parquet](https://parquet.apache.org/) format. It will be larger than the original .slp file uncompressed, but smaller compressed.
+The last of these, `frames.arrow`, is an [Arrow IPC](https://arrow.apache.org/docs/format/Columnar.html#ipc-file-format) file containing all of the game's frame data. This is a columnar format, which makes .slpp files about twice as compressible as .slp files.