Revert D33405358: [fbsync] Add video GPU decoder (#5019)

Differential Revision:
D33405358

Original commit changeset: 0e6251389508

Original Phabricator Diff: D33405358

fbshipit-source-id: b554aaa8003aca08826540883783644aa7eebea9

Author: Haonan Sun

setup.py

@@ -427,59 +427,6 @@ def get_extensions():
             )
         )
 
-    # Locating video codec
-    # CUDA_HOME should be set to the cuda root directory.
-    # TORCHVISION_INCLUDE and TORCHVISION_LIBRARY should include the location to
-    # video codec header files and libraries respectively.
-    video_codec_found = (
-        extension is CUDAExtension
-        and CUDA_HOME is not None
-        and any([os.path.exists(os.path.join(folder, "cuviddec.h")) for folder in vision_include])
-        and any([os.path.exists(os.path.join(folder, "nvcuvid.h")) for folder in vision_include])
-        and any([os.path.exists(os.path.join(folder, "libnvcuvid.so")) for folder in library_dirs])
-    )
-
-    print(f"video codec found: {video_codec_found}")
-
-    if (
-        video_codec_found
-        and has_ffmpeg
-        and any([os.path.exists(os.path.join(folder, "libavcodec", "bsf.h")) for folder in ffmpeg_include_dir])
-    ):
-        gpu_decoder_path = os.path.join(extensions_dir, "io", "decoder", "gpu")
-        gpu_decoder_src = glob.glob(os.path.join(gpu_decoder_path, "*.cpp"))
-        cuda_libs = os.path.join(CUDA_HOME, "lib64")
-        cuda_inc = os.path.join(CUDA_HOME, "include")
-
-        ext_modules.append(
-            extension(
-                "torchvision.Decoder",
-                gpu_decoder_src,
-                include_dirs=include_dirs + [gpu_decoder_path] + [cuda_inc] + ffmpeg_include_dir,
-                library_dirs=ffmpeg_library_dir + library_dirs + [cuda_libs],
-                libraries=[
-                    "avcodec",
-                    "avformat",
-                    "avutil",
-                    "swresample",
-                    "swscale",
-                    "nvcuvid",
-                    "cuda",
-                    "cudart",
-                    "z",
-                    "pthread",
-                    "dl",
-                ],
-                extra_compile_args=extra_compile_args,
-            )
-        )
-    else:
-        print(
-            "The installed version of ffmpeg is missing the header file 'bsf.h' which is "
-            "required for GPU video decoding. Please install the latest ffmpeg from conda-forge channel:"
-            " `conda install -c conda-forge ffmpeg`."
-        )
-
     return ext_modules