tree fe199b451695f910e36a770687bd2afc69176dff
parent 81a9a6b7f08d37d4a635229aa382dee77b7c8b8b
author Wan-Teh Chang <wtc@google.com> 1596585585 -0700
committer Wan-Teh Chang <wtc@google.com> 1596758750 +0000

Fix crash encoding img with small width or height

Fix the crash when encoding an image with a small width or height with
multiple threads.

The fix is to use mt_info->num_workers instead of oxcf->max_threads when
selecting the function to encode tiles (av1_encode_tiles_row_mt(),
av1_encode_tiles_mt(), or encode_tiles(). The correct flow should be:

1. First use oxcf->max_threads and av1_compute_num_enc_workers() when
calling av1_create_workers(), which creates mt_info->workers and sets
mt_info->num_workers.

2. Then use mt_info->num_workers and av1_compute_num_enc_workers() when
calling create_enc_workers(), which assumes mt_info->workers has been
created and sets mt_info->num_enc_workers.

TEST=test_libaom --gtest_filter=EncodeSmallWidthHeight.*
BUG=aomedia:2777

Change-Id: I9ace6ca773bd135f5f730a258b1a62a78018a4d5