(WIP, DNS) [android] Support snapshot of media implementation

b/327287075

starboard/android/shared/BUILD.gn

@@ -352,6 +352,10 @@ static_library("starboard_platform") {
   if (sb_evergreen_compatible_use_libunwind) {
     deps += [ "//third_party/llvm-project/libunwind:unwind_starboard" ]
   }
+
+  snapshotted_media_files = []
+
+  sources -= snapshotted_media_files
 }
 
 static_library("starboard_base_symbolize") {

starboard/android/shared/drm_system.cc

@@ -67,7 +67,7 @@ SbDrmSessionRequestType SbDrmSessionRequestTypeFromMediaDrmKeyRequestType(
 
 // This has to be defined outside the above anonymous namespace to be picked up
 // by the comparison of std::vector<SbDrmKeyId>.
-bool operator==(const SbDrmKeyId& left, const SbDrmKeyId& right) {
+inline bool operator==(const SbDrmKeyId& left, const SbDrmKeyId& right) {
   if (left.identifier_size != right.identifier_size) {
     return false;
   }

starboard/shared/media_snapshot/media_snapshot.h

@@ -0,0 +1,27 @@
+// Copyright 2024 The Cobalt Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef STARBOARD_SHARED_MEDIA_SNAPSHOT_MEDIA_SNAPSHOT_H_
+#define STARBOARD_SHARED_MEDIA_SNAPSHOT_MEDIA_SNAPSHOT_H_
+
+inline int GetMediaSnapshotVersion() {
+#if SB_API_VERSION >= 15
+  return 2500;
+#else   // SB_API_VERSION >= 15
+  // Media snapshot is only support for C25 or after.
+  return 0;
+#endif  // SB_API_VERSION >= 15
+}
+
+#endif  // STARBOARD_SHARED_MEDIA_SNAPSHOT_MEDIA_SNAPSHOT_H_

starboard/tools/media/find_dependency.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+# Copyright 2024 The Cobalt Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+'''Create a snapshot of an Starboard Android TV implementation under
+   'starboard/android/shared/media_<version>/'.  This helps with running
+   multiple Starboard media implementations side by side.'''
+
+import gn_utils
+import os
+import source_utils
+import utils
+
+_GN_TARGETS = [
+    '//starboard/common:common',
+    '//starboard/android/shared:starboard_platform',
+    '//starboard/shared/starboard/media:media_util',
+    '//starboard/shared/starboard/player/filter:filter_based_player_sources',
+]
+
+
+def find_inbound_dependencies(project_root_dir, ninja_output_pathname):
+  project_root_dir = os.path.abspath(os.path.expanduser(project_root_dir))
+  assert os.path.isdir(project_root_dir)
+  assert os.path.isdir(os.path.join(project_root_dir, ninja_output_pathname))
+
+  source_files = []
+
+  for target in _GN_TARGETS:
+    source_files += gn_utils.get_source_pathnames(project_root_dir,
+                                                  ninja_output_pathname, target)
+
+  source_files.sort()
+
+  non_media_files = [f for f in source_files if not utils.is_media_file(f)]
+
+  inbound_dependencies = {}
+
+  for file in non_media_files:
+    with open(file, encoding='utf-8') as f:
+      content = f.read()
+
+    headers = source_utils.extract_project_includes(content)
+    for header in headers:
+      if utils.is_media_file(header):
+        if header in inbound_dependencies:
+          inbound_dependencies[header].append(file)
+        else:
+          inbound_dependencies[header] = [file]
+
+  for header, sources in inbound_dependencies.items():
+    print(header)
+    for source in sources:
+      print(' ', source)
+    print()

starboard/tools/media/gn_utils.py

@@ -0,0 +1,168 @@
+#!/usr/bin/env python3
+# Copyright 2024 The Cobalt Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+'''Utility to work with gn.'''
+
+from datetime import datetime
+from textwrap import dedent
+
+import os
+import subprocess
+
+_COPYRIGHT_HEADER = '''\
+  # Copyright {0} The Cobalt Authors. All Rights Reserved.
+  #
+  # Licensed under the Apache License, Version 2.0 (the "License");
+  # you may not use this file except in compliance with the License.
+  # You may obtain a copy of the License at
+  #
+  #     http://www.apache.org/licenses/LICENSE-2.0
+  #
+  # Unless required by applicable law or agreed to in writing, software
+  # distributed under the License is distributed on an "AS IS" BASIS,
+  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  # See the License for the specific language governing permissions and
+  # limitations under the License.
+  '''
+
+_GN_CONTENT = '''##########################################################
+# Configuration to extract GameActivity native files.
+##########################################################
+
+static_library("{0}") {{
+  check_includes = false
+
+  sources = [
+    {1}
+  ]
+
+  configs += [ "//starboard/build/config:starboard_implementation" ]
+
+  public_deps = [
+    "//starboard/common",
+  ]
+  deps = [
+    "//base",
+    "//third_party/opus",
+  ]
+}}
+'''
+
+_CANONICAL_GN_CONTENT = '''
+static_library("media_snapshot") {{
+  check_includes = false
+
+  sources = [
+    {0}
+  ]
+
+  configs += [ "//starboard/build/config:starboard_implementation" ]
+
+  public_deps = [
+    "//starboard/common",
+  ]
+}}
+'''
+
+
+def _get_copyright_header():
+  return dedent(_COPYRIGHT_HEADER).format(datetime.now().year)
+
+
+def convert_source_list_to_gn_format(project_root_dir, gn_pathname,
+                                     file_pathnames):
+  abs_project_root_dir = os.path.abspath(project_root_dir)
+  abs_gn_pathname = os.path.abspath(gn_pathname)
+
+  # The gn file should reside in the project dir.
+  assert abs_gn_pathname.find(abs_project_root_dir) == 0
+
+  source_list = []
+
+  for file_pathname in file_pathnames:
+    abs_file_pathname = os.path.abspath(file_pathname)
+    if os.path.dirname(file_pathname) == os.path.dirname(abs_gn_pathname):
+      rel_file_pathname = os.path.basename(file_pathname)
+    else:
+      rel_file_pathname = '//' + os.path.relpath(abs_file_pathname,
+                                                 abs_project_root_dir)
+    source_list.append('\"' + rel_file_pathname + '",')
+
+  source_list.sort()
+
+  return source_list
+
+
+def create_gn_file(project_root_dir, gn_pathname, library_name, file_pathnames):
+  abs_project_root_dir = os.path.abspath(project_root_dir)
+  abs_gn_pathname = os.path.abspath(gn_pathname)
+
+  # The gn file should reside in the project dir.
+  assert abs_gn_pathname.find(abs_project_root_dir) == 0
+
+  source_list = convert_source_list_to_gn_format(project_root_dir, gn_pathname,
+                                                 file_pathnames)
+
+  with open(abs_gn_pathname, 'w+', encoding='utf-8') as f:
+    f.write(_get_copyright_header() + '\n' +
+            _GN_CONTENT.format(library_name, '\n    '.join(source_list)))
+
+
+def _get_full_pathname(project_root_dir, pathname_in_gn_format):
+  ''' Transform a pathname in gn format to unix format
+
+      project_root_dir: The project root directory in unix format, e.g.
+                        '/home/.../cobalt'
+      pathname_in_gn_format: A pathname in gn format, e.g. '//starboard/media.h'
+      return: the full path name as '/home/.../cobalt/starboard/media.h'
+  '''
+  assert pathname_in_gn_format.find('//') == 0
+  pathname_in_gn_format = pathname_in_gn_format[2:]
+  pathname = os.path.join(project_root_dir, pathname_in_gn_format)
+  if pathname.find('game-activity') < 0:
+    assert os.path.isfile(pathname), pathname
+  return pathname
+
+
+def get_source_pathnames(project_root_dir, ninja_root_dir, target_name):
+  ''' Return a list of source files built for a particular ninja target
+
+      project_root_dir: The project root directory, e.g. '/home/.../cobalt'
+      ninja_root_dir: The output directory, e.g. 'out/android-arm'
+      target_name: The name of the ninja target, e.g. '//cobalt/base:base'.
+  '''
+  saved_python_path = os.environ['PYTHONPATH']
+  os.environ['PYTHONPATH'] = os.path.abspath(
+      project_root_dir) + ':' + os.environ['PYTHONPATH']
+  gn_desc = subprocess.check_output(['gn', 'desc', ninja_root_dir, target_name],
+                                    cwd=project_root_dir).decode('utf-8')
+  os.environ['PYTHONPATH'] = saved_python_path
+
+  # gn_desc is in format:
+  # ...
+  # sources
+  #   //path/name1
+  #   //path/name2
+  # <empty line>
+  # ...
+  lines = gn_desc.split('\n')
+  sources_index = lines.index('sources')
+  assert sources_index >= 0
+  sources_index += 1
+  sources = []
+  while sources_index < len(lines) and lines[sources_index]:
+    sources.append(
+        _get_full_pathname(project_root_dir, lines[sources_index].strip()))
+    sources_index += 1
+  return sources