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Originally committed as revision 11747 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-02-01 14:28:22 +00:00
parent 7e2ea58313
commit 08e5052930
1 changed files with 16 additions and 15 deletions
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31
libavcodec/tiff.c
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@ -44,25 +44,25 @@ typedef struct TiffContext {
int strips, rps; int strips, rps;
int sot; int sot;
uint8_t* stripdata; const uint8_t* stripdata;
uint8_t* stripsizes; const uint8_t* stripsizes;
int stripsize, stripoff; int stripsize, stripoff;
LZWState *lzw; LZWState *lzw;
} TiffContext; } TiffContext;
static int tget_short(uint8_t **p, int le){ static int tget_short(const uint8_t **p, int le){
int v = le ? AV_RL16(*p) : AV_RB16(*p); int v = le ? AV_RL16(*p) : AV_RB16(*p);
*p += 2; *p += 2;
return v; return v;
} }
static int tget_long(uint8_t **p, int le){ static int tget_long(const uint8_t **p, int le){
int v = le ? AV_RL32(*p) : AV_RB32(*p); int v = le ? AV_RL32(*p) : AV_RB32(*p);
*p += 4; *p += 4;
return v; return v;
} }
static int tget(uint8_t **p, int type, int le){ static int tget(const uint8_t **p, int type, int le){
switch(type){ switch(type){
case TIFF_BYTE : return *(*p)++; case TIFF_BYTE : return *(*p)++;
case TIFF_SHORT: return tget_short(p, le); case TIFF_SHORT: return tget_short(p, le);
@ -71,9 +71,9 @@ static int tget(uint8_t **p, int type, int le){
} }
} }
static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, uint8_t *src, int size, int lines){ 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; int c, line, pixels, code;
uint8_t *ssrc = src; const uint8_t *ssrc = src;
int width = s->width * (s->bpp / 8); int width = s->width * (s->bpp / 8);
#ifdef CONFIG_ZLIB #ifdef CONFIG_ZLIB
uint8_t *zbuf; unsigned long outlen; uint8_t *zbuf; unsigned long outlen;
@ -150,13 +150,14 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, uint8_t *
} }
static int tiff_decode_tag(TiffContext *s, uint8_t *start, uint8_t *buf, uint8_t *end_buf, AVFrame *pic) static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf, AVFrame *pic)
{ {
int tag, type, count, off, value = 0; int tag, type, count, off, value = 0;
uint8_t *src, *dst; const uint8_t *src;
uint8_t *dst;
int i, j, ssize, soff, stride; int i, j, ssize, soff, stride;
uint32_t *pal; uint32_t *pal;
uint8_t *rp, *gp, *bp; const uint8_t *rp, *gp, *bp;
tag = tget_short(&buf, s->le); tag = tget_short(&buf, s->le);
type = tget_short(&buf, s->le); type = tget_short(&buf, s->le);
@ -346,14 +347,14 @@ static int tiff_decode_tag(TiffContext *s, uint8_t *start, uint8_t *buf, uint8_t
return -1; return -1;
} }
if(value == 2){ if(value == 2){
src = pic->data[0]; dst = pic->data[0];
stride = pic->linesize[0]; stride = pic->linesize[0];
soff = s->bpp >> 3; soff = s->bpp >> 3;
ssize = s->width * soff; ssize = s->width * soff;
for(i = 0; i < s->height; i++) { for(i = 0; i < s->height; i++) {
for(j = soff; j < ssize; j++) for(j = soff; j < ssize; j++)
src[j] += src[j - soff]; dst[j] += dst[j - soff];
src += stride; dst += stride;
} }
} }
break; break;
@ -403,12 +404,12 @@ static int tiff_decode_tag(TiffContext *s, uint8_t *start, uint8_t *buf, uint8_t
static int decode_frame(AVCodecContext *avctx, static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size, void *data, int *data_size,
uint8_t *buf, int buf_size) const uint8_t *buf, int buf_size)
{ {
TiffContext * const s = avctx->priv_data; TiffContext * const s = avctx->priv_data;
AVFrame *picture = data; AVFrame *picture = data;
AVFrame * const p= (AVFrame*)&s->picture; AVFrame * const p= (AVFrame*)&s->picture;
uint8_t *orig_buf = buf, *end_buf = buf + buf_size; const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
int id, le, off; int id, le, off;
int i, entries; int i, entries;