1 files changed, 8 insertions, 4 deletions
diff --git a/media/base/limits.h b/media/base/limits.h
index 8694efa..517a5d1 100644
--- a/media/base/limits.h
+++ b/media/base/limits.h
@@ -16,10 +16,14 @@ struct Limits {
   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;
+  // Following limits are used by AudioParameters::IsValid().
+  // The 192 Khz constant is the frequency of quicktime lossless audio codec.
+  // MP4 is limited to 96 Khz, and mp3 is limited to 48 Khz.
+  // OGG vorbis was initially limited to 96 Khz, but recent tools are unlimited.
+  // 192 Khz is also the limit on most PC audio hardware.
+  static const int kMaxSampleRate = 192000;
+  static const int kMaxChannels = 32;
+  static const int kMaxBitsPerSample = 64;
 
   // Maximum possible time.
   static const int64 kMaxTimeInMicroseconds = kint64max;