Remove converting int to decoder

Author: scotts

src/torchcodec/_core/custom_ops.cpp

@@ -40,7 +40,6 @@ TORCH_LIBRARY(torchcodec_ns, m) {
       "create_from_tensor(Tensor video_tensor, str? seek_mode=None) -> Tensor");
   m.def(
       "_create_from_file_like(int file_like_context, str? seek_mode=None) -> Tensor");
-  m.def("_convert_to_tensor(int decoder_ptr) -> Tensor");
   m.def(
       "_add_video_stream(Tensor(a!) decoder, *, int? width=None, int? height=None, int? num_threads=None, str? dimension_order=None, int? stream_index=None, str? device=None, (Tensor, Tensor, Tensor)? custom_frame_mappings=None, str? color_conversion_library=None) -> ()");
   m.def(
@@ -233,12 +232,6 @@ at::Tensor _create_from_file_like(
   return wrapDecoderPointerToTensor(std::move(uniqueDecoder));
 }
 
-at::Tensor _convert_to_tensor(int64_t decoder_ptr) {
-  auto decoder = reinterpret_cast<SingleStreamDecoder*>(decoder_ptr);
-  std::unique_ptr<SingleStreamDecoder> uniqueDecoder(decoder);
-  return wrapDecoderPointerToTensor(std::move(uniqueDecoder));
-}
-
 void _add_video_stream(
     at::Tensor& decoder,
     std::optional<int64_t> width = std::nullopt,
@@ -748,7 +741,6 @@ TORCH_LIBRARY_IMPL(torchcodec_ns, BackendSelect, m) {
   m.impl("create_from_file", &create_from_file);
   m.impl("create_from_tensor", &create_from_tensor);
   m.impl("_create_from_file_like", &_create_from_file_like);
-  m.impl("_convert_to_tensor", &_convert_to_tensor);
   m.impl(
       "_get_json_ffmpeg_library_versions", &_get_json_ffmpeg_library_versions);
 }

src/torchcodec/_core/ops.py

@@ -104,9 +104,6 @@ def load_torchcodec_shared_libraries():
 _create_from_file_like = torch._dynamo.disallow_in_graph(
     torch.ops.torchcodec_ns._create_from_file_like.default
 )
-_convert_to_tensor = torch._dynamo.disallow_in_graph(
-    torch.ops.torchcodec_ns._convert_to_tensor.default
-)
 add_video_stream = torch.ops.torchcodec_ns.add_video_stream.default
 _add_video_stream = torch.ops.torchcodec_ns._add_video_stream.default
 add_audio_stream = torch.ops.torchcodec_ns.add_audio_stream.default
@@ -257,11 +254,6 @@ def create_from_tensor_abstract(
     return torch.empty([], dtype=torch.long)
 
 
-@register_fake("torchcodec_ns::_convert_to_tensor")
-def _convert_to_tensor_abstract(decoder_ptr: int) -> torch.Tensor:
-    return torch.empty([], dtype=torch.long)
-
-
 @register_fake("torchcodec_ns::_add_video_stream")
 def _add_video_stream_abstract(
     decoder: torch.Tensor,