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new b637624046 avcodec/vulkan_av1: fix mi_col_starts and mi_row_starts
units
b637624046 is described below
commit b637624046a0c2d737ed8fb0b09286d114366ef1
Author: Hyunjun Ko <[email protected]>
AuthorDate: Tue Jan 20 18:36:20 2026 +0900
Commit: Lynne <[email protected]>
CommitDate: Wed Jan 21 10:42:02 2026 +0000
avcodec/vulkan_av1: fix mi_col_starts and mi_row_starts units
The spec says:
pMiColStarts is a pointer to an array of TileCols number
of unsigned integers that corresponds to MiColStarts
defined in section 6.8.14 of the [AV1 Specification]
And the unit of MiColStarts is MI(mode info).
So is pMiRowStarts.
---
libavcodec/vulkan_av1.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavcodec/vulkan_av1.c b/libavcodec/vulkan_av1.c
index 3bee784a4f..08c371746e 100644
--- a/libavcodec/vulkan_av1.c
+++ b/libavcodec/vulkan_av1.c
@@ -252,9 +252,11 @@ static int vk_av1_start_frame(AVCodecContext
*avctx,
int err;
int ref_count = 0;
AV1DecContext *s = avctx->priv_data;
+ const AV1RawSequenceHeader *seq = s->raw_seq;
const AV1Frame *pic = &s->cur_frame;
FFVulkanDecodeContext *dec = avctx->internal->hwaccel_priv_data;
uint32_t frame_id_alloc_mask = 0;
+ uint16_t sb_shift = seq->use_128x128_superblock ? 5 : 4;
AV1VulkanDecodePicture *ap = pic->hwaccel_picture_private;
FFVulkanDecodePicture *vp = &ap->vp;
@@ -498,8 +500,8 @@ static int vk_av1_start_frame(AVCodecContext
*avctx,
for (int i = 0; i < 64; i++) {
ap->width_in_sbs_minus1[i] = frame_header->width_in_sbs_minus_1[i];
ap->height_in_sbs_minus1[i] = frame_header->height_in_sbs_minus_1[i];
- ap->mi_col_starts[i] = frame_header->tile_start_col_sb[i];
- ap->mi_row_starts[i] = frame_header->tile_start_row_sb[i];
+ ap->mi_col_starts[i] = frame_header->tile_start_col_sb[i] << sb_shift;
+ ap->mi_row_starts[i] = frame_header->tile_start_row_sb[i] << sb_shift;
}
for (int i = 0; i < STD_VIDEO_AV1_MAX_SEGMENTS; i++) {
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