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tiff: add helper function for fill_order case 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2013-05-28 17:13:26 +00:00
parent b257d9a01f
commit 30d7dcce4c
1 changed files with 21 additions and 22 deletions
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43
libavcodec/tiff.c
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@ -411,6 +411,19 @@ static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
}
}
static int deinvert_buffer(TiffContext *s, const uint8_t *src, int size)
{
int i;
av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size);
if (!s->deinvert_buf)
return AVERROR(ENOMEM);
for (i = 0; i < size; i++)
s->deinvert_buf[i] = ff_reverse[src[i]];
return 0;
}
static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
const uint8_t *src, int size, int lines)
{
@ -423,31 +436,23 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
#if CONFIG_ZLIB
if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
uint8_t *src2 = NULL, *zbuf;
uint8_t *zbuf;
unsigned long outlen;
int i, ret;
int ret;
outlen = width * lines;
zbuf = av_malloc(outlen);
if (!zbuf)
return AVERROR(ENOMEM);
if (s->fill_order) {
src2 = av_malloc((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!src2) {
av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
av_free(zbuf);
return AVERROR(ENOMEM);
}
for (i = 0; i < size; i++)
src2[i] = ff_reverse[src[i]];
memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
src = src2;
if ((ret = deinvert_buffer(s, src, size)) < 0)
return ret;
ssrc = src = s->deinvert_buf;
}
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(src2);
av_free(zbuf);
return AVERROR_UNKNOWN;
}
@ -461,21 +466,15 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
dst += stride;
src += width;
}
av_free(src2);
av_free(zbuf);
return 0;
}
#endif
if (s->compr == TIFF_LZW) {
if (s->fill_order) {
int i;
av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size);
if (!s->deinvert_buf)
return AVERROR(ENOMEM);
for (i = 0; i < size; i++)
s->deinvert_buf[i] = ff_reverse[src[i]];
src = s->deinvert_buf;
ssrc = src;
if ((ret = deinvert_buffer(s, src, size)) < 0)
return ret;
ssrc = src = s->deinvert_buf;
}
if (size > 1 && !src[0] && (src[1]&1)) {
av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n");