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avcodec/pgssubdec: do not fail when part of the packet is faulty unless AV_EF_EXPLODE is set

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
John Stebbins 2014-06-18 13:38:36 -07:00 committed by Michael Niedermayer
parent 376f353e3d
commit ca7f2a7372
1 changed files with 11 additions and 6 deletions
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17
libavcodec/pgssubdec.c
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@ -254,7 +254,7 @@ static int parse_picture_segment(AVCodecContext *avctx,
* @param buf pointer to the packet to process
* @param buf_size size of packet to process
*/
static void parse_palette_segment(AVCodecContext *avctx,
static int parse_palette_segment(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
PGSSubContext *ctx = avctx->priv_data;
@ -283,6 +283,7 @@ static void parse_palette_segment(AVCodecContext *avctx,
/* Store color in palette */
ctx->clut[color_id] = RGBA(r,g,b,alpha);
}
return 0;
}
/**
@ -493,17 +494,16 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size,
if (segment_type != DISPLAY_SEGMENT && segment_length > buf_end - buf)
break;
ret = 0;
switch (segment_type) {
case PALETTE_SEGMENT:
parse_palette_segment(avctx, buf, segment_length);
ret = parse_palette_segment(avctx, buf, segment_length);
break;
case OBJECT_SEGMENT:
parse_picture_segment(avctx, buf, segment_length);
ret = parse_picture_segment(avctx, buf, segment_length);
break;
case PRESENTATION_SEGMENT:
ret = parse_presentation_segment(avctx, buf, segment_length, sub->pts);
if (ret < 0)
return ret;
break;
case WINDOW_SEGMENT:
/*
@ -516,13 +516,18 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size,
*/
break;
case DISPLAY_SEGMENT:
*data_size = display_end_segment(avctx, data, buf, segment_length);
ret = display_end_segment(avctx, data, buf, segment_length);
if (ret >= 0)
*data_size = ret;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unknown subtitle segment type 0x%x, length %d\n",
segment_type, segment_length);
ret = AVERROR_INVALIDDATA;
break;
}
if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
return ret;
buf += segment_length;
}