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avcodec/jpeg2000dec: move cdef default check into get_siz()

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This way cdef is at its final value earlier

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2025-08-05 23:18:47 +02:00
committed by michaelni
parent f45da79b2c
commit 104d6846c1
1 changed files with 11 additions and 11 deletions
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22
libavcodec/jpeg2000dec.c
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@@ -271,6 +271,17 @@ static int get_siz(Jpeg2000DecoderContext *s)
return AVERROR_INVALIDDATA;
}
for (i = 0; i < s->ncomponents; i++) {
if (s->cdef[i] < 0) {
for (i = 0; i < s->ncomponents; i++) {
s->cdef[i] = i + 1;
}
if ((s->ncomponents & 1) == 0)
s->cdef[s->ncomponents-1] = 0;
}
}
// after here we no longer have to consider negative cdef
for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
uint8_t x = bytestream2_get_byteu(&s->g);
s->cbps[i] = (x & 0x7f) + 1;
@@ -2885,17 +2896,6 @@ static int jpeg2000_decode_frame(AVCodecContext *avctx, AVFrame *picture,
if (ret = jpeg2000_read_bitstream_packets(s))
goto end;
for (int x = 0; x < s->ncomponents; x++) {
if (s->cdef[x] < 0) {
for (x = 0; x < s->ncomponents; x++) {
s->cdef[x] = x + 1;
}
if ((s->ncomponents & 1) == 0)
s->cdef[s->ncomponents-1] = 0;
break;
}
}
for (int x = 0; x < s->ncomponents && s->codsty[x].transform == FF_DWT53;)
if (++x == s->ncomponents)
picture->flags |= AV_FRAME_FLAG_LOSSLESS;