Fix undefined shift on assumed 8-bit input.
authorDale Curtis <dalecurtis@chromium.org>
Sat, 18 Nov 2017 00:05:30 +0000 (16:05 -0800)
committerMichael Niedermayer <michael@niedermayer.cc>
Tue, 21 Nov 2017 02:13:03 +0000 (03:13 +0100)
commit7010dd98b575d2e39fca947e609b85be7490b269
treea1c13f535fae2827a62bd3fd732cc7b4a94fddfa
parent753074721bd414874d18c372c491bdc6323fa3bf
Fix undefined shift on assumed 8-bit input.

decode_user_data() attempts to create an integer |build|
value with 8 bits of spacing for 3 components. However
each component is an int32_t, so shifting each component
is undefined for values outside of the 8 bit range.

This patch simply clamps input to 8-bits per component
and prints out a warning that the values were clamped.

Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/mpeg4videodec.c