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Merge commit '067432c1c95882c7221e694f33d9f3bdbe46de7f'

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* commit '067432c1c95882c7221e694f33d9f3bdbe46de7f':
  loco: check that there is data left after decoding a plane.
  lagarith: avoid infinite loop in lag_rac_refill()

Conflicts:
	libavcodec/loco.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-24 12:57:08 +01:00
commit 714ff44858
2 changed files with 9 additions and 3 deletions
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3
libavcodec/lagarithrac.h
View File

@ -107,6 +107,9 @@ static inline uint8_t lag_get_rac(lag_rac *l)
l->range -= range_scaled * l->prob[255]; l->range -= range_scaled * l->prob[255];
} }
if (!l->range)
l->range = 0x80;
l->low -= range_scaled * l->prob[val]; l->low -= range_scaled * l->prob[val];
return val; return val;

9
libavcodec/loco.c
View File

@ -190,7 +190,7 @@ static int decode_frame(AVCodecContext *avctx,
p->key_frame = 1; p->key_frame = 1;
#define ADVANCE_BY_DECODED do { \ #define ADVANCE_BY_DECODED do { \
if (decoded < 0) goto stop; \ if (decoded < 0 || decoded >= buf_size) goto buf_too_small; \
buf += decoded; buf_size -= decoded; \ buf += decoded; buf_size -= decoded; \
} while(0) } while(0)
switch(l->mode) { switch(l->mode) {
@ -224,7 +224,8 @@ static int decode_frame(AVCodecContext *avctx,
decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 2, avctx->width, avctx->height, decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 2, avctx->width, avctx->height,
-p->linesize[0], buf, buf_size, 3); -p->linesize[0], buf, buf_size, 3);
break; break;
case LOCO_CRGBA: case LOCO_RGBA: case LOCO_CRGBA:
case LOCO_RGBA:
decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1), avctx->width, avctx->height, decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1), avctx->width, avctx->height,
-p->linesize[0], buf, buf_size, 4); -p->linesize[0], buf, buf_size, 4);
ADVANCE_BY_DECODED; ADVANCE_BY_DECODED;
@ -238,12 +239,14 @@ static int decode_frame(AVCodecContext *avctx,
-p->linesize[0], buf, buf_size, 4); -p->linesize[0], buf, buf_size, 4);
break; break;
} }
stop:
*got_frame = 1; *got_frame = 1;
*(AVFrame*)data = l->pic; *(AVFrame*)data = l->pic;
return buf_size < 0 ? -1 : avpkt->size - buf_size; return buf_size < 0 ? -1 : avpkt->size - buf_size;
buf_too_small:
av_log(avctx, AV_LOG_ERROR, "Input data too small.\n");
return AVERROR(EINVAL);
} }
static av_cold int decode_init(AVCodecContext *avctx) static av_cold int decode_init(AVCodecContext *avctx)