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avcodec/clearvideo: Redo updating predicition

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This is in preparation for further commits.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-11-06 23:56:16 +01:00
parent a7a783a5c5
commit c2966ae14c
1 changed files with 16 additions and 8 deletions
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24
libavcodec/clearvideo.c
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@ -296,7 +296,7 @@ static int copyadd_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
return 0;
}
static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
static MV *mvi_predict(MVInfo *mvi, int mb_x, int mb_y)
{
MV res, pred_mv;
int left_mv, right_mv, top_mv, bot_mv;
@ -336,10 +336,16 @@ static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
res.y = bot_mv;
}
mvi->mv[mvi->mb_stride + mb_x].x = res.x + diff.x;
mvi->mv[mvi->mb_stride + mb_x].y = res.y + diff.y;
mvi->mv[mvi->mb_stride + mb_x].x = res.x;
mvi->mv[mvi->mb_stride + mb_x].y = res.y;
return res;
return &mvi->mv[mvi->mb_stride + mb_x];
}
static void mvi_update_prediction(MV *mv, MV diff)
{
mv->x += diff.x;
mv->y += diff.y;
}
static void mvi_reset(MVInfo *mvi, int mb_w, int mb_h, int mb_size)
@ -575,11 +581,13 @@ static int clv_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
for (j = 0; j < c->pmb_height; j++) {
for (i = 0; i < c->pmb_width; i++) {
MV *mvp, mv;
if (get_bits_left(&c->gb) <= 0)
return AVERROR_INVALIDDATA;
if (get_bits1(&c->gb)) {
MV mv = mvi_predict(&c->mvi, i, j, zero_mv);
mvp = mvi_predict(&c->mvi, i, j);
mv = *mvp;
if (get_bits1(&c->gb)) {
for (plane = 0; plane < 3; plane++) {
int16_t x = plane == 0 ? i << c->tile_shift : i << (c->tile_shift - 1);
int16_t y = plane == 0 ? j << c->tile_shift : j << (c->tile_shift - 1);
@ -596,15 +604,15 @@ static int clv_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
int y = j << c->tile_shift;
int size = 1 << c->tile_shift;
TileInfo *tile;
MV mv, cmv;
MV cmv;
tile = decode_tile_info(&c->gb, &lev[0]); // Y
if (!tile)
return AVERROR(ENOMEM);
mv = mvi_predict(&c->mvi, i, j, tile->mv);
ret = restore_tree(avctx, c->pic, c->prev, 0, x, y, size, tile, mv);
if (ret < 0)
mb_ret = ret;
mvi_update_prediction(mvp, tile->mv);
x = i << (c->tile_shift - 1);
y = j << (c->tile_shift - 1);
size = 1 << (c->tile_shift - 1);