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Looks like ZLib uncompress() cannot deal with some kinds of TIFF deflated data, 

so replace it with custom code.
This fixes issue 1419.

Originally committed as revision 20054 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2009-09-27 07:01:01 +00:00
parent 3b6c5ad2f6
commit e96f885aa0
1 changed files with 25 additions and 2 deletions
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27
libavcodec/tiff.c
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@ -75,6 +75,27 @@ static int tget(const uint8_t **p, int type, int le){
}
}
static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
{
z_stream zstream;
int zret;
memset(&zstream, 0, sizeof(zstream));
zstream.next_in = src;
zstream.avail_in = size;
zstream.next_out = dst;
zstream.avail_out = *len;
zret = inflateInit(&zstream);
if (zret != Z_OK) {
av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
return zret;
}
zret = inflate(&zstream, Z_SYNC_FLUSH);
inflateEnd(&zstream);
*len = zstream.total_out;
return zret == Z_STREAM_END ? Z_OK : zret;
}
static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
int c, line, pixels, code;
const uint8_t *ssrc = src;
@ -83,10 +104,12 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
uint8_t *zbuf; unsigned long outlen;
if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
int ret;
outlen = width * lines;
zbuf = av_malloc(outlen);
if(uncompress(zbuf, &outlen, src, size) != Z_OK){
av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu)\n", outlen, (unsigned long)width * lines);
ret = tiff_uncompress(zbuf, &outlen, src, size);
if(ret != Z_OK){
av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
av_free(zbuf);
return -1;
}