Set the max_transform_hierarchy_depth_inter/intra to 2 by default
based on the Programmer's Reference Manuals (PRM) in [1].
Intel Encoder only supports 2 levels of quad-tree. That is:
- max_transform_hierarchy_depth_inter/intra <= 2.
[1]
<https://01.org/sites/default/files/documentation/intel-gfx-prm-osrc-kbl-vol10-hevc.pdf>
Signed-off-by: Linjie Fu <[email protected]>
---
Fixed value for intel platform, makes more sense on TGL+ platform.
(If conflict with other driver capability, we may add query support
later)
libavcodec/vaapi_encode_h265.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libavcodec/vaapi_encode_h265.c b/libavcodec/vaapi_encode_h265.c
index cd48545..d6cb82a 100644
--- a/libavcodec/vaapi_encode_h265.c
+++ b/libavcodec/vaapi_encode_h265.c
@@ -445,8 +445,9 @@ static int
vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
sps->log2_min_luma_transform_block_size_minus2 = 0;
sps->log2_diff_max_min_luma_transform_block_size = 3;
// Full transform hierarchy allowed (2-5).
- sps->max_transform_hierarchy_depth_inter = 3;
- sps->max_transform_hierarchy_depth_intra = 3;
+ // Default to 2 based on Programmer's Reference Manuals of Intel graphics
+ sps->max_transform_hierarchy_depth_inter = 2;
+ sps->max_transform_hierarchy_depth_intra = 2;
// AMP works.
sps->amp_enabled_flag = 1;
// SAO and temporal MVP do not work.
--
2.7.4
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