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avcodec/intrax8: Don't pretend to need more than one int16_t[64]

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Intrax8 needs only a single block.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-06-16 00:10:45 +02:00
parent 25e4baeed4
commit aa4a5b1e33
4 changed files with 12 additions and 12 deletions
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16
libavcodec/intrax8.c
View File

@ -437,7 +437,7 @@ static void x8_ac_compensation(IntraX8Context *const w, const int direction,
const int dc_level)
{
int t;
#define B(x,y) w->block[0][w->idct_permutation[(x) + (y) * 8]]
#define B(x,y) w->block[w->idct_permutation[(x) + (y) * 8]]
#define T(x) ((x) * dc_level + 0x8000) >> 16;
switch (direction) {
case 0:
@ -530,7 +530,7 @@ static int x8_decode_intra_mb(IntraX8Context *const w, const int chroma)
int sign;
av_assert2(w->orient < 12);
w->bdsp.clear_block(w->block[0]);
w->bdsp.clear_block(w->block);
if (chroma)
dc_mode = 2;
@ -591,7 +591,7 @@ static int x8_decode_intra_mb(IntraX8Context *const w, const int chroma)
if (use_quant_matrix)
level = (level * quant_table[pos]) >> 8;
w->block[0][scantable[pos]] = level;
w->block[scantable[pos]] = level;
} while (!final);
} else { // DC only
if (w->flat_dc && ((unsigned) (dc_level + 1)) < 3) { // [-1; 1]
@ -613,9 +613,9 @@ static int x8_decode_intra_mb(IntraX8Context *const w, const int chroma)
zeros_only = dc_level == 0;
}
if (!chroma)
w->block[0][0] = dc_level * w->quant;
w->block[0] = dc_level * w->quant;
else
w->block[0][0] = dc_level * w->quant_dc_chroma;
w->block[0] = dc_level * w->quant_dc_chroma;
// there is !zero_only check in the original, but dc_level check is enough
if ((unsigned int) (dc_level + 1) >= 3 && (w->edges & 3) != 3) {
@ -624,7 +624,7 @@ static int x8_decode_intra_mb(IntraX8Context *const w, const int chroma)
* -> 01'10' 10'10' 00'00' 00'01' 01'11' 11'00 => 0x6A017C */
direction = (0x6A017C >> (w->orient * 2)) & 3;
if (direction != 3) {
x8_ac_compensation(w, direction, w->block[0][0]);
x8_ac_compensation(w, direction, w->block[0]);
}
}
@ -639,7 +639,7 @@ static int x8_decode_intra_mb(IntraX8Context *const w, const int chroma)
if (!zeros_only)
w->wdsp.idct_add(w->dest[chroma],
w->frame->linesize[!!chroma],
w->block[0]);
w->block);
block_placed:
if (!chroma)
@ -678,7 +678,7 @@ static void x8_init_block_index(IntraX8Context *w, AVFrame *frame)
av_cold int ff_intrax8_common_init(AVCodecContext *avctx,
IntraX8Context *w,
int16_t (*block)[64],
int16_t block[64],
int mb_width, int mb_height)
{
static AVOnce init_static_once = AV_ONCE_INIT;

4
libavcodec/intrax8.h
View File

@ -38,7 +38,7 @@ typedef struct IntraX8Context {
WMV2DSPContext wdsp;
uint8_t idct_permutation[64];
AVCodecContext *avctx;
int16_t (*block)[64];
int16_t *block;
// set by the caller codec
IntraX8DSPContext dsp;
@ -82,7 +82,7 @@ typedef struct IntraX8Context {
*/
int ff_intrax8_common_init(AVCodecContext *avctx,
IntraX8Context *w,
int16_t (*block)[64],
int16_t block[64],
int mb_width, int mb_height);
/**

2
libavcodec/vc1dec.c
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@ -420,7 +420,7 @@ static av_cold int vc1_decode_init_alloc_tables(VC1Context *v)
return AVERROR(ENOMEM);
}
ret = ff_intrax8_common_init(s->avctx, &v->x8, s->block,
ret = ff_intrax8_common_init(s->avctx, &v->x8, s->block[0],
s->mb_width, s->mb_height);
if (ret < 0)
return ret;

2
libavcodec/wmv2dec.c
View File

@ -581,7 +581,7 @@ static av_cold int wmv2_decode_init(AVCodecContext *avctx)
decode_ext_header(w);
return ff_intrax8_common_init(avctx, &w->x8, s->block,
return ff_intrax8_common_init(avctx, &w->x8, s->block[0],
s->mb_width, s->mb_height);
}