Linux: add a tool and code to make use_system_ffmpeg option more comp…

…atible

This introduces a compile-time detection of ffmpeg configuration
(which codecs are available).

See https://groups.google.com/a/chromium.org/d/msg/chromium-dev/fm5Oe_AC3Sc/qkbmC7txaSkJ
for more context.

No functional change for Google Chrome.

BUG=none

Review URL: https://codereview.chromium.org/12302029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@183463 0039d316-1c4b-4281-b951-d872f2087c98

build/common.gypi

@@ -741,6 +741,9 @@
     'google_default_client_secret%': '<(google_default_client_secret)',
     'enable_managed_users%': '<(enable_managed_users)',
 
+    # Use system ffmpeg instead of bundled one.
+    'use_system_ffmpeg%': 0,
+
     # Use system mesa instead of bundled one.
     'use_system_mesa%': 0,
 

media/ffmpeg/ffmpeg_common.cc

@@ -84,8 +84,10 @@ AudioCodec CodecIDToAudioCodec(CodecID codec_id) {
       return kCodecGSM_MS;
     case CODEC_ID_PCM_MULAW:
       return kCodecPCM_MULAW;
+#ifndef CHROMIUM_OMIT_CODEC_ID_OPUS
     case CODEC_ID_OPUS:
       return kCodecOpus;
+#endif
     default:
       DVLOG(1) << "Unknown audio CodecID: " << codec_id;
   }
@@ -129,8 +131,10 @@ static CodecID AudioCodecToCodecID(AudioCodec audio_codec,
       return CODEC_ID_GSM_MS;
     case kCodecPCM_MULAW:
       return CODEC_ID_PCM_MULAW;
+#ifndef CHROMIUM_OMIT_CODEC_ID_OPUS
     case kCodecOpus:
       return CODEC_ID_OPUS;
+#endif
     default:
       DVLOG(1) << "Unknown AudioCodec: " << audio_codec;
   }
@@ -147,8 +151,10 @@ VideoCodec CodecIDToVideoCodec(CodecID codec_id) {
       return kCodecMPEG4;
     case CODEC_ID_VP8:
       return kCodecVP8;
+#ifndef CHROMIUM_OMIT_AV_CODEC_ID_VP9
     case AV_CODEC_ID_VP9:
       return kCodecVP9;
+#endif
     default:
       DVLOG(1) << "Unknown video CodecID: " << codec_id;
   }
@@ -165,8 +171,10 @@ static CodecID VideoCodecToCodecID(VideoCodec video_codec) {
       return CODEC_ID_MPEG4;
     case kCodecVP8:
       return CODEC_ID_VP8;
+#ifndef CHROMIUM_OMIT_AV_CODEC_ID_VP9
     case kCodecVP9:
       return AV_CODEC_ID_VP9;
+#endif
     default:
       DVLOG(1) << "Unknown VideoCodec: " << video_codec;
   }
@@ -468,8 +476,10 @@ ChannelLayout ChannelLayoutToChromeChannelLayout(int64_t layout, int channels) {
       return CHANNEL_LAYOUT_6_1_FRONT;
     case AV_CH_LAYOUT_7POINT0_FRONT:
       return CHANNEL_LAYOUT_7_0_FRONT;
+#ifdef AV_CH_LAYOUT_7POINT1_WIDE_BACK
     case AV_CH_LAYOUT_7POINT1_WIDE_BACK:
       return CHANNEL_LAYOUT_7_1_WIDE_BACK;
+#endif
     case AV_CH_LAYOUT_OCTAGONAL:
       return CHANNEL_LAYOUT_OCTAGONAL;
     default:

media/media.gyp

@@ -469,6 +469,18 @@
             'filters/vpx_video_decoder.h',
           ],
         }],
+        ['use_system_ffmpeg == 1', {
+          'defines': [
+            '<!(python <(DEPTH)/tools/compile_test/compile_test.py '
+                '--code "#include <libavcodec/avcodec.h>\n'
+                'int test() { return CODEC_ID_OPUS; }" '
+                '--on-failure CHROMIUM_OMIT_CODEC_ID_OPUS)',
+            '<!(python <(DEPTH)/tools/compile_test/compile_test.py '
+                '--code "#include <libavcodec/avcodec.h>\n'
+                'int test() { return AV_CODEC_ID_VP9; }" '
+                '--on-failure CHROMIUM_OMIT_AV_CODEC_ID_VP9)',
+          ],
+        }],
         ['OS == "ios"', {
           'includes': [
             # For shared_memory_support_sources variable.

tools/compile_test/compile_test.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# Copyright (c) 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Tries to compile given code, produces different output depending on success.
+
+This is similar to checks done by ./configure scripts.
+"""
+
+
+import optparse
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+
+
+def DoMain(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('--code')
+  parser.add_option('--on-success', default='')
+  parser.add_option('--on-failure', default='')
+
+  options, args = parser.parse_args(argv)
+
+  if not options.code:
+    parser.error('Missing required --code switch.')
+
+  cxx = os.environ.get('CXX', 'g++')
+
+  tmpdir = tempfile.mkdtemp()
+  try:
+    cxx_path = os.path.join(tmpdir, 'test.cc')
+    with open(cxx_path, 'w') as f:
+      f.write(options.code.decode('string-escape'))
+
+    o_path = os.path.join(tmpdir, 'test.o')
+
+    cxx_popen = subprocess.Popen([cxx, cxx_path, '-o', o_path, '-c'],
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.PIPE)
+    cxx_stdout, cxx_stderr = cxx_popen.communicate()
+    if cxx_popen.returncode == 0:
+      print options.on_success
+    else:
+      print options.on_failure
+  finally:
+    shutil.rmtree(tmpdir)
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(DoMain(sys.argv[1:]))