GitLab

H264Decoder will now call H264Accelerator::SetStream() for each buffer
so that the accelerator can check for encrypted streams. It will be
called from Decode() so that the accelerator can return kTryAgain
if it determines that additional data is needed to handle the stream
(e.g. decryption key is needed). Default implementation of SetStream()
does nothing, and returns kNotSupported which allows Decode() to
continue.

The decoder will also call H264Accelerator::ParseSliceHeader() before
calling the same method on H264Parser. This allows the accelerator to
handle the slice header if it is encrypted. Default implementation
returns kNotSupported which forces the decoder to call the H264Parser
method.

BUG=837455
TEST=new media_unittests pass

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I6d31b57f85b366ca9518904923b00300341afe98
Reviewed-on: https://chromium-review.googlesource.com/c/1166220
Commit-Queue: John Rummell <jrummell@chromium.org>
Reviewed-by: Rintaro Kuroiwa <rkuroiwa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601775}