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Fix decoding of VMDs representing sprites (Last Dynasty, Woodruff).

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Fixes issue 101

Originally committed as revision 10552 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2007-09-23 16:11:07 +00:00
parent c1f3c63058
commit ac14047927
1 changed files with 10 additions and 0 deletions
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10
libavcodec/vmdav.c
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@ -68,6 +68,7 @@ typedef struct VmdVideoContext {
unsigned char *unpack_buffer;
int unpack_buffer_size;
int x_off, y_off;
} VmdVideoContext;
#define QUEUE_SIZE 0x1000
@ -207,6 +208,15 @@ static void vmd_decode(VmdVideoContext *s)
frame_width = AV_RL16(&s->buf[10]) - frame_x + 1;
frame_height = AV_RL16(&s->buf[12]) - frame_y + 1;
if ((frame_width == s->avctx->width && frame_height == s->avctx->height) &&
(frame_x || frame_y)) {
s->x_off = frame_x;
s->y_off = frame_y;
}
frame_x -= s->x_off;
frame_y -= s->y_off;
/* if only a certain region will be updated, copy the entire previous
* frame before the decode */
if (frame_x || frame_y || (frame_width != s->avctx->width) ||