Reference index count in VE_H264_PPS reg should come from PPS control. However, this is not really important because reference index count is in our case always overridden by that from slice header. Cc: nicolas@xxxxxxxxxxxx Cc: boris.brezillon@xxxxxxxxxxxxx Cc: jonas@xxxxxxxxx Signed-off-by: Jernej Skrabec <jernej.skrabec@xxxxxxxx> --- We have to decide if we drop pps->num_ref_idx_l0_default_active_minus1 and pps->num_ref_idx_l1_default_active_minus1 fields or add num_ref_idx_l0_active_override_flag and num_ref_idx_l0_active_override_flag to slice control. Current control doesn't have those two flags, so in Cedrus override flag is always set and we rely on userspace to set slice->num_ref_idx_l0_active_minus1 and slice->num_ref_idx_l1_active_minus1 to correct values. This means that values stored in PPS are not needed and always ignored by VPU. If I understand correctly, algorithm is very simple: ref_count = PPS->ref_count if (override_flag) ref_count = slice->ref_count It seems that VAAPI provides only final value. In my opinion we should do the same - get rid of PPS default ref index count fields. drivers/staging/media/sunxi/cedrus/cedrus_h264.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c index a30bb283f69f..cc8d17f211a1 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c @@ -340,12 +340,8 @@ static void cedrus_set_params(struct cedrus_ctx *ctx, // picture parameters reg = 0; - /* - * FIXME: the kernel headers are allowing the default value to - * be passed, but the libva doesn't give us that. - */ - reg |= (slice->num_ref_idx_l0_active_minus1 & 0x1f) << 10; - reg |= (slice->num_ref_idx_l1_active_minus1 & 0x1f) << 5; + reg |= (pps->num_ref_idx_l0_default_active_minus1 & 0x1f) << 10; + reg |= (pps->num_ref_idx_l1_default_active_minus1 & 0x1f) << 5; reg |= (pps->weighted_bipred_idc & 0x3) << 2; if (pps->flags & V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE) reg |= VE_H264_PPS_ENTROPY_CODING_MODE; -- 2.21.0
