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Code Issues Releases Activity

avcodec/mpeg12dec: Fix missing slice handling without padding

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-02-24 01:44:27 +01:00
parent 4170a44bbc
commit 10fa50c156
1 changed files with 5 additions and 3 deletions
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8
libavcodec/mpeg12dec.c
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@ -1871,6 +1871,7 @@ static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
if (++s->mb_x >= s->mb_width) {
const int mb_size = 16 >> s->avctx->lowres;
int left;
ff_mpeg_draw_horiz_band(s, mb_size * (s->mb_y >> field_pic), mb_size);
ff_mpv_report_decode_progress(s);
@ -1910,12 +1911,13 @@ static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
// in cases where the slice is completely outside the visible
// area, we detect this here instead of running into the end expecting
// more data
left = get_bits_left(&s->gb);
if (s->mb_y >= ((s->height + 15) >> 4) &&
!s->progressive_sequence &&
get_bits_left(&s->gb) <= 8 &&
get_bits_left(&s->gb) >= 0 &&
left <= 25 &&
left >= 0 &&
s->mb_skip_run == -1 &&
show_bits(&s->gb, 8) == 0)
(!left || show_bits(&s->gb, left) == 0))
goto eos;
ff_init_block_index(s);