Fix tiff lib and remove stub ffmpeg libraries for macOS support

.travis/build.test.sh

@@ -44,7 +44,6 @@ fi
 bazel build \
   --noshow_progress \
   --noshow_loading_progress \
-  --spawn_strategy standalone \
   --verbose_failures \
   --test_output=errors -- \
   //tensorflow_io/...

.travis/python.release.sh

@@ -65,7 +65,6 @@ fi
 bazel build \
   --noshow_progress \
   --noshow_loading_progress \
-  --spawn_strategy standalone \
   --verbose_failures \
   --test_output=errors -- \
   //tensorflow_io/...

tensorflow_io/video/BUILD

@@ -2,13 +2,6 @@ licenses(["notice"])  # Apache 2.0
 
 package(default_visibility = ["//visibility:public"])
 
-# Note: stub files are generated from Ubuntu 14.0 with
-# `echo '' | g++ -shared -fPIC -x c++ - -o $@`
-filegroup(
-    name = "stub.so",
-    srcs = glob(["kernel/stub/*"]),
-)
-
 cc_binary(
     name = 'python/ops/_video_ops_ffmpeg_3.4.so',
     srcs = [
@@ -19,21 +12,13 @@ cc_binary(
     ],
     includes = ["."],
     linkshared = 1,
-    linkopts = [
-        "-Ltensorflow_io/video/kernels/stub",
-        "-l:libavformat.so.57",
-        "-l:libavcodec.so.57",
-        "-l:libavutil.so.55",
-        "-l:libswscale.so.4",
-    ],
+    linkopts = [],
     deps = [
         "@local_config_tf//:libtensorflow_framework",
         "@local_config_tf//:tf_header_lib",
 	"@ffmpeg_3_4//:ffmpeg",
     ],
-    data = [
-        ":stub.so",
-    ],
+    data = [],
     copts = ["-pthread", "-std=c++11", "-D_GLIBCXX_USE_CXX11_ABI=0", "-DNDEBUG"]
 )
 
@@ -47,21 +32,13 @@ cc_binary(
     ],
     includes = ["."],
     linkshared = 1,
-    linkopts = [
-        "-Ltensorflow_io/video/kernels/stub",
-	"-l:libavformat-ffmpeg.so.56",
-	"-l:libavcodec-ffmpeg.so.56",
-	"-l:libavutil-ffmpeg.so.54",
-	"-l:libswscale-ffmpeg.so.3",
-    ],
+    linkopts = [],
     deps = [
         "@local_config_tf//:libtensorflow_framework",
         "@local_config_tf//:tf_header_lib",
 	"@ffmpeg_2_8//:ffmpeg",
     ],
-    data = [
-        ":stub.so",
-    ],
+    data = [],
     copts = ["-pthread", "-std=c++11", "-D_GLIBCXX_USE_CXX11_ABI=0", "-DNDEBUG"]
 )
 
@@ -75,20 +52,12 @@ cc_binary(
     ],
     includes = ["."],
     linkshared = 1,
-    linkopts = [
-        "-Ltensorflow_io/video/kernels/stub",
-	"-l:libavformat.so.54",
-	"-l:libavcodec.so.54",
-	"-l:libavutil.so.52",
-	"-l:libswscale.so.2",
-    ],
+    linkopts = [],
     deps = [
         "@local_config_tf//:libtensorflow_framework",
         "@local_config_tf//:tf_header_lib",
 	"@libav_9_20//:libav",
     ],
-    data = [
-        ":stub.so",
-    ],
+    data = [],
     copts = ["-pthread", "-std=c++11", "-D_GLIBCXX_USE_CXX11_ABI=0", "-DNDEBUG"]
 )

tensorflow_io/video/python/ops/video_dataset_ops.py

@@ -18,20 +18,56 @@
 from __future__ import print_function
 
 import os
+import ctypes
+import _ctypes
 
 import tensorflow
 from tensorflow import dtypes
 from tensorflow import errors
 from tensorflow.compat.v1 import data
 from tensorflow_io import _load_library
-video_ops = None
-for f in ['_video_ops_ffmpeg_3.4.so', '_video_ops_ffmpeg_2.8.so', '_video_ops_libav_9.20.so']:
-  try:
-    video_ops = _load_library(f)
-    break;
-  except NotImplementedError as e:
-    print(e)
 
+def load_dependency_and_library(p):
+  for library in p:
+    # First try load all dependencies with RTLD_LOCAL
+    entries = []
+    for dependency in p[library]:
+      try:
+        entries.append(ctypes.CDLL(dependency))
+      except OSError as e:
+        pass
+    if len(entries) == len(p[library]):
+      # Dependencies has been satisfied, load dependencies again with RTLD_GLOBAL, no error is expected
+      for dependency in p[library]:
+        ctypes.CDLL(dependency, mode=ctypes.RTLD_GLOBAL)
+      # Load video_op
+      return _load_library(library)
+    # Otherwise we dlclose and retry
+    entries.reverse()
+    for entry in entries:
+      _ctypes.dlclose(entry._handle)
+  raise NotImplementedError("could not find ffmpeg after search through ", p)
+
+video_ops = load_dependency_and_library({
+    '_video_ops_ffmpeg_3.4.so' : [
+        "libavformat.so.57",
+        "libavformat.so.57",
+        "libavutil.so.55",
+        "libswscale.so.4",
+    ],
+    '_video_ops_ffmpeg_2.8.so' : [
+        "libavformat-ffmpeg.so.56",
+        "libavcodec-ffmpeg.so.56",
+        "libavutil-ffmpeg.so.54",
+        "libswscale-ffmpeg.so.3",
+    ],
+    '_video_ops_libav_9.20.so' : [
+        "libavformat.so.54",
+        "libavcodec.so.54",
+        "libavutil.so.52",
+        "libswscale.so.2",
+    ],
+})
 
 class VideoDataset(data.Dataset):
   """A Video File Dataset that reads the video file."""

third_party/libtiff.BUILD

@@ -13,10 +13,11 @@ cc_library(
     exclude=[
         "libtiff/tif_win32.c",
     ]),
-    hdrs = [
-        "libtiff/tiff.h",
-        "libtiff/tiffconf.h",
+    hdrs = glob([
+        "libtiff/*.h",
+    ]) + [
         "libtiff/tif_config.h",
+        "libtiff/tiffconf.h",
     ],
     copts = [
         "-D_GLIBCXX_USE_CXX11_ABI=0",