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avcodec/jpeg2000: Fast fail if HTJ2K codeblocks are present. 

Reviewed-by: Pierre-Anthony Lemieux <pal@sandflow.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
caleb 2022-05-06 09:55:43 +03:00 committed by Michael Niedermayer
parent 13b3becc7b
commit 6a0cec5315
2 changed files with 6 additions and 0 deletions
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2
libavcodec/jpeg2000.h
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@ -110,6 +110,8 @@ enum Jpeg2000Quantsty { // quantization style
#define JPEG2000_CSTY_PREC 0x01 // Precincts defined in coding style
#define JPEG2000_CSTY_SOP 0x02 // SOP marker present
#define JPEG2000_CSTY_EPH 0x04 // EPH marker present
#define JPEG2000_CTSY_HTJ2K_F 0x40 // Only HT code-blocks (Rec. ITU-T T.814 | ISO/IEC 15444-15) are present
#define JPEG2000_CTSY_HTJ2K_M 0xC0 // HT code blocks (Rec. ITU-T T.814 | ISO/IEC 15444-15) can be present
// Progression orders
#define JPEG2000_PGOD_LRCP 0x00 // Layer-resolution level-component-position progression

4
libavcodec/jpeg2000dec.c
View File

@ -521,6 +521,10 @@ static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
c->cblk_style = bytestream2_get_byteu(&s->g);
if (c->cblk_style != 0) { // cblk style
if (c->cblk_style & JPEG2000_CTSY_HTJ2K_M || c->cblk_style & JPEG2000_CTSY_HTJ2K_F) {
av_log(s->avctx, AV_LOG_ERROR, "Support for High throughput JPEG 2000 is not yet available\n");
return AVERROR_PATCHWELCOME;
}
av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style);
if (c->cblk_style & JPEG2000_CBLK_BYPASS)
av_log(s->avctx, AV_LOG_WARNING, "Selective arithmetic coding bypass\n");