blob: 03d78b1d454329bb0c8a8f648b3f0116ddcba75e [file] [log] [blame]
// Copyright (c) 2012 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 <windows.h>
#if defined(_WIN32_WINNT_WIN8)
// The Windows 8 SDK defines FACILITY_VISUALCPP in winerror.h.
#include <delayimp.h>
#include "base/files/file_path.h"
#include "base/metrics/sparse_histogram.h"
#include "media/ffmpeg/ffmpeg_common.h"
#pragma comment(lib, "delayimp.lib")
namespace media {
namespace internal {
bool InitializeMediaLibraryInternal(const base::FilePath& module_dir) {
// LoadLibraryEx(..., LOAD_WITH_ALTERED_SEARCH_PATH) cannot handle
// relative path.
if (!module_dir.IsAbsolute())
return false;
// Use alternate DLL search path so we don't load dependencies from the
// system path. Refer to
static const char kFFmpegDLL[] = "ffmpegsumo.dll";
HMODULE lib = ::LoadLibraryEx(
module_dir.AppendASCII(kFFmpegDLL).value().c_str(), NULL,
bool initialized = (lib != NULL);
// TODO(scherkus): Remove all the bool-ness from these functions as we no
// longer support disabling HTML5 media at runtime.
if (!initialized) {
UMA_HISTOGRAM_SPARSE_SLOWLY("Media.Initialize.Windows", GetLastError());
return false;
// VS2013 has a bug where FMA3 instructions will be executed on CPUs that
// support them despite them being disabled at the OS level, causing illegal
// instruction exceptions. Because Web Audio's FFT code *might* run before
// HTML5 media code, call av_log_set_level() to force library initialziation.
// See for details.
return initialized;
} // namespace internal
} // namespace media