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Code Issues Releases Activity

lavc/av1: Record reference ordering information for each frame

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This is needed by Vulkan.  Constructing this can't be delegated to CBS
because packets might contain multiple frames (when non-shown frames are
present) but we need separate snapshots immediately before each frame
for the decoder.
This commit is contained in:
Mark Thompson 2024-04-13 20:05:23 +01:00
parent f48987f609
commit 22ced1edc6
2 changed files with 34 additions and 0 deletions
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26
libavcodec/av1dec.c
View File

@ -359,6 +359,25 @@ static void coded_lossless_param(AV1DecContext *s)
}
}
static void order_hint_info(AV1DecContext *s)
{
const AV1RawFrameHeader *header = s->raw_frame_header;
const AV1RawSequenceHeader *seq = s->raw_seq;
AV1Frame *frame = &s->cur_frame;
frame->order_hint = header->order_hint;
for (int i = 0; i < AV1_REFS_PER_FRAME; i++) {
int ref_name = i + AV1_REF_FRAME_LAST;
int ref_slot = header->ref_frame_idx[i];
int ref_order_hint = s->ref[ref_slot].order_hint;
frame->order_hints[ref_name] = ref_order_hint;
frame->ref_frame_sign_bias[ref_name] =
get_relative_dist(seq, ref_order_hint, frame->order_hint);
}
}
static void load_grain_params(AV1DecContext *s)
{
const AV1RawFrameHeader *header = s->raw_frame_header;
@ -701,6 +720,12 @@ static int av1_frame_ref(AVCodecContext *avctx, AV1Frame *dst, const AV1Frame *s
sizeof(dst->film_grain));
dst->coded_lossless = src->coded_lossless;
dst->order_hint = src->order_hint;
memcpy(dst->ref_frame_sign_bias, src->ref_frame_sign_bias,
sizeof(dst->ref_frame_sign_bias));
memcpy(dst->order_hints, src->order_hints,
sizeof(dst->order_hints));
return 0;
fail:
@ -1257,6 +1282,7 @@ static int get_current_frame(AVCodecContext *avctx)
global_motion_params(s);
skip_mode_params(s);
coded_lossless_param(s);
order_hint_info(s);
load_grain_params(s);
return ret;

8
libavcodec/av1dec.h
View File

@ -53,6 +53,14 @@ typedef struct AV1Frame {
AV1RawFilmGrainParams film_grain;
uint8_t coded_lossless;
// OrderHint for this frame.
uint8_t order_hint;
// RefFrameSignBias[] used when decoding this frame.
uint8_t ref_frame_sign_bias[AV1_TOTAL_REFS_PER_FRAME];
// OrderHints[] when this is the current frame, otherwise
// SavedOrderHints[s][] when is the reference frame in slot s.
uint8_t order_hints[AV1_TOTAL_REFS_PER_FRAME];
} AV1Frame;
typedef struct TileGroupInfo {