Rework Python binding with Pybind11

.github/workflows/ci.yaml

@@ -90,4 +90,5 @@ jobs:
       with:
         python-version: '3.10'
         cache: 'pip'
-    - run: pip install .
+    - run: pip install . --group dev
+    - run: pytest python/tests

meson.build

@@ -36,5 +36,6 @@ if get_option('tools')
 endif
 
 if get_option('python')
+    add_languages('cpp')
     subdir('python')
 endif

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["meson-python"]
+requires = ["meson-python", "pybind11"]
 build-backend = "mesonpy"
 
 [project]
@@ -12,7 +12,7 @@ authors = [
 description = "LC3 Codec library wrapper"
 requires-python = ">=3.10"
 
-[project.optional-dependencies]
+[dependency-groups]
 dev = ["pytest"]
 
 [project.urls]

python/_lc3.pyi

@@ -0,0 +1,56 @@
+import collections.abc
+
+class Decoder:
+    def __init__(
+        self,
+        hrmode: bool,
+        dt_us: int,
+        sr_hz: int,
+        sr_pcm_hz: int,
+        nchannels: int,
+    ) -> None: ...
+    def decode(
+        self, data_obj: collections.abc.Buffer | None, pcm_fmt: int
+    ) -> bytes: ...
+    def get_frame_samples(self) -> int: ...
+
+class Encoder:
+    def __init__(
+        self,
+        hrmode: bool,
+        dt_us: int,
+        sr_hz: int,
+        sr_pcm_hz: int,
+        nchannels: int,
+    ) -> None: ...
+    def encode(
+        self,
+        pcm: collections.abc.Buffer,
+        pcm_fmt: int,
+        num_bytes: int,
+    ) -> bytes: ...
+    def get_frame_samples(self) -> int: ...
+
+def lc3_hr_delay_samples(
+    hrmode: bool,
+    dt_us: int,
+    sr_hz: int,
+) -> int: ...
+def lc3_hr_frame_block_bytes(
+    hrmode: bool,
+    dt_us: int,
+    sr_hz: int,
+    nchannels: int,
+    bitrate: int,
+) -> int: ...
+def lc3_hr_frame_samples(
+    hrmode: bool,
+    dt_us: int,
+    sr_hz: int,
+) -> int: ...
+def lc3_hr_resolve_bitrate(
+    hrmode: bool,
+    dt_us: int,
+    sr_hz: int,
+    nbytes: int,
+) -> int: ...