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avcodec/qdrw: do better w/h parsing for direct bit packing

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Apparently using 0x0001 opcode solely is not correct.
Try this instead.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-02-23 15:20:24 +01:00
parent dcd3418a35
commit f062947261
1 changed files with 11 additions and 10 deletions
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21
libavcodec/qdrw.c
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@ -310,7 +310,7 @@ static int decode_frame(AVCodecContext *avctx,
AVFrame * const p = data;
GetByteContext gbc;
int colors;
int w, h, x0, y0, x1, y1, ret;
int w, h, ret;
int ver;
bytestream2_init(&gbc, avpkt->data, avpkt->size);
@ -355,14 +355,7 @@ static int decode_frame(AVCodecContext *avctx,
switch(opcode) {
case CLIP:
bytestream2_get_be16(&gbc);
y0 = bytestream2_get_be16(&gbc);
x0 = bytestream2_get_be16(&gbc);
y1 = bytestream2_get_be16(&gbc);
x1 = bytestream2_get_be16(&gbc);
ret = ff_set_dimensions(avctx, x1 - x0, y1 - y0);
if (ret < 0)
return ret;
bytestream2_skip(&gbc, 10);
break;
case PACKBITSRECT:
case PACKBITSRGN:
@ -437,7 +430,15 @@ static int decode_frame(AVCodecContext *avctx,
return AVERROR_PATCHWELCOME;
}
bytestream2_skip(&gbc, 10);
bytestream2_skip(&gbc, 4);
h = bytestream2_get_be16(&gbc);
w = bytestream2_get_be16(&gbc);
bytestream2_skip(&gbc, 2);
ret = ff_set_dimensions(avctx, w, h);
if (ret < 0)
return ret;
pack_type = bytestream2_get_be16(&gbc);
bytestream2_skip(&gbc, 16);