media/base/media.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/base/media.h"
   6
   7 #include "base/files/file_path.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/path_service.h"
  10 #include "base/synchronization/lock.h"
  11 #include "base/trace_event/trace_event.h"
  12 #include "build/build_config.h"
  13 #include "media/base/yuv_convert.h"
  14
  15 #if !defined(MEDIA_DISABLE_FFMPEG)
  16 #include "media/ffmpeg/ffmpeg_common.h"
  17 #endif
  18
  19 namespace media {
  20
  21 // Media must only be initialized once, so use a LazyInstance to ensure this.
  22 class MediaInitializer {
  23  private:
  24   friend struct base::DefaultLazyInstanceTraits<MediaInitializer>;
  25
  26   MediaInitializer() {
  27     TRACE_EVENT_WARMUP_CATEGORY("audio");
  28     TRACE_EVENT_WARMUP_CATEGORY("media");
  29
  30     // Perform initialization of libraries which require runtime CPU detection.
  31     InitializeCPUSpecificYUVConversions();
  32
  33 #if !defined(MEDIA_DISABLE_FFMPEG)
  34     // Initialize CPU flags outside of the sandbox as this may query /proc for
  35     // details on the current CPU for NEON, VFP, etc optimizations.
  36     av_get_cpu_flags();
  37
  38     // Disable logging as it interferes with layout tests.
  39     av_log_set_level(AV_LOG_QUIET);
  40
  41 #if defined(ALLOCATOR_SHIM)
  42     // Remove allocation limit from ffmpeg, so calls go down to shim layer.
  43     av_max_alloc(0);
  44 #endif  // defined(ALLOCATOR_SHIM)
  45
  46 #endif  // !defined(MEDIA_DISABLE_FFMPEG)
  47   }
  48
  49   ~MediaInitializer() {
  50     NOTREACHED() << "MediaInitializer should be leaky!";
  51   }
  52
  53   DISALLOW_COPY_AND_ASSIGN(MediaInitializer);
  54 };
  55
  56 static base::LazyInstance<MediaInitializer>::Leaky g_media_library =
  57     LAZY_INSTANCE_INITIALIZER;
  58
  59 void InitializeMediaLibrary() {
  60   g_media_library.Get();
  61 }
  62
  63 }  // namespace media