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| 1 // Copyright (c) 2012 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 <windows.h> |
| 8 #if defined(_WIN32_WINNT_WIN8) |
| 9 // The Windows 8 SDK defines FACILITY_VISUALCPP in winerror.h. |
| 10 #undef FACILITY_VISUALCPP |
| 11 #endif |
| 12 #include <delayimp.h> |
| 13 |
| 14 #include "base/files/file_path.h" |
| 15 #include "base/metrics/sparse_histogram.h" |
| 16 #include "media/ffmpeg/ffmpeg_common.h" |
| 17 |
| 18 #pragma comment(lib, "delayimp.lib") |
| 19 |
| 20 namespace media { |
| 21 namespace internal { |
| 22 |
| 23 bool InitializeMediaLibraryInternal(const base::FilePath& module_dir) { |
| 24 // LoadLibraryEx(..., LOAD_WITH_ALTERED_SEARCH_PATH) cannot handle |
| 25 // relative path. |
| 26 if (!module_dir.IsAbsolute()) |
| 27 return false; |
| 28 |
| 29 // Use alternate DLL search path so we don't load dependencies from the |
| 30 // system path. Refer to http://crbug.com/35857 |
| 31 static const char kFFmpegDLL[] = "ffmpegsumo.dll"; |
| 32 HMODULE lib = ::LoadLibraryEx( |
| 33 module_dir.AppendASCII(kFFmpegDLL).value().c_str(), NULL, |
| 34 LOAD_WITH_ALTERED_SEARCH_PATH); |
| 35 |
| 36 bool initialized = (lib != NULL); |
| 37 |
| 38 // TODO(scherkus): Remove all the bool-ness from these functions as we no |
| 39 // longer support disabling HTML5 media at runtime. http://crbug.com/440892 |
| 40 if (!initialized) { |
| 41 UMA_HISTOGRAM_SPARSE_SLOWLY("Media.Initialize.Windows", GetLastError()); |
| 42 return false; |
| 43 } |
| 44 |
| 45 // VS2013 has a bug where FMA3 instructions will be executed on CPUs that |
| 46 // support them despite them being disabled at the OS level, causing illegal |
| 47 // instruction exceptions. Because Web Audio's FFT code *might* run before |
| 48 // HTML5 media code, call av_log_set_level() to force library initialziation. |
| 49 // See http://crbug.com/440892 for details. |
| 50 av_log_set_level(AV_LOG_QUIET); |
| 51 |
| 52 return initialized; |
| 53 } |
| 54 |
| 55 } // namespace internal |
| 56 } // namespace media |
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