media/base/media.cc

// Copyright 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.

#include "media/base/media.h"

#include "base/files/file_path.h"
#include "base/lazy_instance.h"
#include "base/path_service.h"
#include "base/synchronization/lock.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "media/base/yuv_convert.h"

#if !defined(MEDIA_DISABLE_FFMPEG)
#include "media/ffmpeg/ffmpeg_common.h"
#endif

namespace media {

// Media must only be initialized once, so use a LazyInstance to ensure this.
class MediaInitializer {
 private:
  friend struct base::DefaultLazyInstanceTraits<MediaInitializer>;

  MediaInitializer() {
    TRACE_EVENT_WARMUP_CATEGORY("audio");
    TRACE_EVENT_WARMUP_CATEGORY("media");

    // Perform initialization of libraries which require runtime CPU detection.
    InitializeCPUSpecificYUVConversions();

#if !defined(MEDIA_DISABLE_FFMPEG)
    // Initialize CPU flags outside of the sandbox as this may query /proc for
    // details on the current CPU for NEON, VFP, etc optimizations.
    av_get_cpu_flags();

    // Disable logging as it interferes with layout tests.
    av_log_set_level(AV_LOG_QUIET);

#if defined(ALLOCATOR_SHIM)
    // Remove allocation limit from ffmpeg, so calls go down to shim layer.
    av_max_alloc(0);
#endif  // defined(ALLOCATOR_SHIM)

#endif  // !defined(MEDIA_DISABLE_FFMPEG)
  }

  ~MediaInitializer() {
    NOTREACHED() << "MediaInitializer should be leaky!";
  }

  DISALLOW_COPY_AND_ASSIGN(MediaInitializer);
};

static base::LazyInstance<MediaInitializer>::Leaky g_media_library =
    LAZY_INSTANCE_INITIALIZER;

void InitializeMediaLibrary() {
  g_media_library.Get();
}

}  // namespace media