SoftAMR: check input buffer size to avoid overflow. am: 55e5218 am: 4a9d762 am: d82ca56 am: 7840f05 am: adb7d9c
am: 9eedbf4

* commit '9eedbf45eeaad2717b6f3b0fba53b264f691eef3':
  SoftAMR: check input buffer size to avoid overflow.