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cinepak: detect keyframes

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Code by DivX, Inc.
Taken from drffmpeg
Author: unknown

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-04 04:13:32 +02:00
parent 2f9d6ffda7
commit dd968a2edf
1 changed files with 5 additions and 0 deletions
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5
libavcodec/cinepak.c
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@ -355,6 +355,8 @@ static int cinepak_decode (CinepakContext *s)
if (num_strips > MAX_STRIPS)
num_strips = MAX_STRIPS;
s->frame.key_frame = 0;
for (i=0; i < num_strips; i++) {
if ((s->data + 12) > eod)
return -1;
@ -365,6 +367,9 @@ static int cinepak_decode (CinepakContext *s)
s->strips[i].y2 = y0 + AV_RB16 (&s->data[8]);
s->strips[i].x2 = s->avctx->width;
if (s->strips[i].id == 0x10)
s->frame.key_frame = 1;
strip_size = AV_RB24 (&s->data[1]) - 12;
s->data += 12;
strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size;