Apply some sanity checks to the values coming back to us from FFmpeg.

Put the limits in a new standalone header file that can be re-used in other
place where we have similar limits.

BUG=NONE
TEST=media_unittests pass

Review URL: http://codereview.chromium.org/200011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25416 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 28 insertions, 0 deletions

diff --git a/media/base/limits.h b/media/base/limits.h
new file mode 100644
index 0000000..583d6dd
--- /dev/null
+++ b/media/base/limits.h
@@ -0,0 +1,28 @@
+// Copyright (c) 2009 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.
+
+// Contains limit definition constants for the media subsystem.
+
+#ifndef MEDIA_BASE_LIMITS_H_
+#define MEDIA_BASE_LIMITS_H_
+
+#include "base/basictypes.h"
+
+namespace media {
+
+struct Limits {
+  // For video.
+  static const size_t kMaxDimension = (1 << 15) - 1;  // 32767
+  static const size_t kMaxCanvas = (1 << (14 * 2));  // 16384 x 16384
+
+  // For audio.
+  static const size_t kMaxSampleRate = 192000;
+  static const size_t kMaxChannels = 32;
+  static const size_t kMaxBPS = 64;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_LIMITS_H_
+