Add internal usage logging

src/torchcodec/decoders/_audio_decoder.py

@@ -8,6 +8,7 @@
 from pathlib import Path
 from typing import Optional, Union
 
+import torch
 from torch import Tensor
 
 from torchcodec import _core as core, AudioSamples
@@ -59,6 +60,7 @@ def __init__(
         sample_rate: Optional[int] = None,
         num_channels: Optional[int] = None,
     ):
+        torch._C._log_api_usage_once("torchcodec.decoders.AudioDecoder")
         self._decoder = create_decoder(source=source, seek_mode="approximate")
 
         core.add_audio_stream(

src/torchcodec/decoders/_video_decoder.py

@@ -9,6 +9,7 @@
 from pathlib import Path
 from typing import Literal, Optional, Tuple, Union
 
+import torch
 from torch import device as torch_device, Tensor
 
 from torchcodec import _core as core, Frame, FrameBatch
@@ -80,6 +81,7 @@ def __init__(
         device: Optional[Union[str, torch_device]] = "cpu",
         seek_mode: Literal["exact", "approximate"] = "exact",
     ):
+        torch._C._log_api_usage_once("torchcodec.decoders.VideoDecoder")
         allowed_seek_modes = ("exact", "approximate")
         if seek_mode not in allowed_seek_modes:
             raise ValueError(

src/torchcodec/encoders/_audio_encoder.py

@@ -21,6 +21,7 @@ class AudioEncoder:
     """
 
     def __init__(self, samples: Tensor, *, sample_rate: int):
+        torch._C._log_api_usage_once("torchcodec.encoders.AudioEncoder")
         # Some of these checks are also done in C++: it's OK, they're cheap, and
         # doing them here allows to surface them when the AudioEncoder is
         # instantiated, rather than later when the encoding methods are called.

src/torchcodec/samplers/_index_based.py

@@ -196,6 +196,7 @@ def clips_at_random_indices(
     policy: Literal["repeat_last", "wrap", "error"] = "repeat_last",
 ) -> FrameBatch:
     # See docstring below
+    torch._C._log_api_usage_once("torchcodec.samplers.clips_at_random_indices")
     return _generic_index_based_sampler(
         kind="random",
         decoder=decoder,
@@ -219,6 +220,7 @@ def clips_at_regular_indices(
     policy: Literal["repeat_last", "wrap", "error"] = "repeat_last",
 ) -> FrameBatch:
     # See docstring below
+    torch._C._log_api_usage_once("torchcodec.samplers.clips_at_regular_indices")
     return _generic_index_based_sampler(
         kind="regular",
         decoder=decoder,

src/torchcodec/samplers/_time_based.py

@@ -231,6 +231,7 @@ def clips_at_random_timestamps(
     policy: Literal["repeat_last", "wrap", "error"] = "repeat_last",
 ) -> FrameBatch:
     # See docstring below
+    torch._C._log_api_usage_once("torchcodec.samplers.clips_at_random_timestamps")
     return _generic_time_based_sampler(
         kind="random",
         decoder=decoder,
@@ -256,6 +257,7 @@ def clips_at_regular_timestamps(
     policy: Literal["repeat_last", "wrap", "error"] = "repeat_last",
 ) -> FrameBatch:
     # See docstring below
+    torch._C._log_api_usage_once("torchcodec.samplers.clips_at_regular_timestamps")
     return _generic_time_based_sampler(
         kind="regular",
         decoder=decoder,