* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
+ */
+
+/**
+ * TIFF image decoder
+ * @file tiff.c
+ * @author Konstantin Shishkov
*/
#include "avcodec.h"
#ifdef CONFIG_ZLIB
#include <zlib.h>
#endif
#include "lzw.h"
+#include "tiff.h"
+#include "faxcompr.h"
-/* abridged list of TIFF tags */
-enum TiffTags{
- TIFF_WIDTH = 0x100,
- TIFF_HEIGHT,
- TIFF_BPP,
- TIFF_COMPR,
- TIFF_INVERT = 0x106,
- TIFF_STRIP_OFFS = 0x111,
- TIFF_ROWSPERSTRIP = 0x116,
- TIFF_STRIP_SIZE,
- TIFF_PLANAR = 0x11C,
- TIFF_XPOS = 0x11E,
- TIFF_YPOS = 0x11F,
- TIFF_PREDICTOR = 0x13D,
- TIFF_PAL = 0x140
-};
-
-enum TiffCompr{
- TIFF_RAW = 1,
- TIFF_CCITT_RLE,
- TIFF_G3,
- TIFF_G4,
- TIFF_LZW,
- TIFF_JPEG,
- TIFF_NEWJPEG,
- TIFF_ADOBE_DEFLATE,
- TIFF_PACKBITS = 0x8005,
- TIFF_DEFLATE = 0x80B2
-};
-
-enum TiffTypes{
- TIFF_BYTE = 1,
- TIFF_STRING,
- TIFF_SHORT,
- TIFF_LONG,
- TIFF_LONGLONG
-};
-
-/** sizes of various TIFF field types */
-static const int type_sizes[6] = {
- 0, 1, 100, 2, 4, 8
-};
typedef struct TiffContext {
AVCodecContext *avctx;
int le;
int compr;
int invert;
+ int fax_opts;
+ int predictor;
- int strips, rps;
+ int strips, rps, sstype;
int sot;
- uint8_t* stripdata;
- uint8_t* stripsizes;
+ const uint8_t* stripdata;
+ const uint8_t* stripsizes;
int stripsize, stripoff;
LZWState *lzw;
} 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);
*p += 2;
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);
*p += 4;
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){
case TIFF_BYTE : return *(*p)++;
case TIFF_SHORT: return tget_short(p, 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;
- uint8_t *ssrc = src;
- int width = s->width * (s->bpp / 8);
+ const uint8_t *ssrc = src;
+ int width = s->width * s->bpp >> 3;
#ifdef CONFIG_ZLIB
uint8_t *zbuf; unsigned long outlen;
return -1;
}
}
+ if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
+ int i, ret = 0;
+ uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
+
+ if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
+ av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
+ return -1;
+ }
+ for(i = 0; i < size; i++)
+ src2[i] = ff_reverse[src[i]];
+ memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+ if(s->compr == TIFF_G3 && !(s->fax_opts & 1))
+ s->compr = TIFF_CCITT_RLE;
+ switch(s->compr){
+ case TIFF_CCITT_RLE:
+ case TIFF_G3:
+ case TIFF_G4:
+ ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr);
+ break;
+ }
+ av_free(src2);
+ return ret;
+ }
for(line = 0; line < lines; line++){
if(src - ssrc > size){
av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
}
switch(s->compr){
case TIFF_RAW:
- memcpy(dst, src, s->width * (s->bpp / 8));
- src += s->width * (s->bpp / 8);
+ memcpy(dst, src, width);
+ src += width;
break;
case TIFF_PACKBITS:
for(pixels = 0; pixels < width;){
}
-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)
{
int tag, type, count, off, value = 0;
- uint8_t *src, *dst;
- int i, j, ssize, soff, stride;
- int *pal, *rp, *gp, *bp;
+ int i, j;
+ uint32_t *pal;
+ const uint8_t *rp, *gp, *bp;
tag = tget_short(&buf, s->le);
type = tget_short(&buf, s->le);
value = off;
buf = NULL;
break;
+ case TIFF_STRING:
+ if(count <= 4){
+ buf -= 4;
+ break;
+ }
default:
value = -1;
buf = start + off;
}
}
switch(s->bpp){
+ case 1:
+ s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
+ break;
case 8:
s->avctx->pix_fmt = PIX_FMT_PAL8;
break;
}
if(s->bpp == 8){
/* make default grayscale pal */
- pal = s->picture.data[1];
+ pal = (uint32_t *) s->picture.data[1];
for(i = 0; i < 256; i++)
pal[i] = i * 0x010101;
}
break;
case TIFF_COMPR:
s->compr = value;
+ s->predictor = 0;
switch(s->compr){
case TIFF_RAW:
case TIFF_PACKBITS:
case TIFF_LZW:
+ case TIFF_CCITT_RLE:
+ break;
+ case TIFF_G3:
+ case TIFF_G4:
+ s->fax_opts = 0;
break;
case TIFF_DEFLATE:
case TIFF_ADOBE_DEFLATE:
av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
return -1;
#endif
- case TIFF_G3:
- av_log(s->avctx, AV_LOG_ERROR, "CCITT G3 compression is not supported\n");
- return -1;
- case TIFF_G4:
- av_log(s->avctx, AV_LOG_ERROR, "CCITT G4 compression is not supported\n");
- return -1;
- case TIFF_CCITT_RLE:
- av_log(s->avctx, AV_LOG_ERROR, "CCITT RLE compression is not supported\n");
- return -1;
case TIFF_JPEG:
case TIFF_NEWJPEG:
av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
}
break;
case TIFF_ROWSPERSTRIP:
+ if(type == TIFF_LONG && value == -1)
+ value = s->avctx->height;
if(value < 1){
av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
return -1;
}else
s->stripdata = start + off;
s->strips = count;
+ if(s->strips == 1) s->rps = s->height;
s->sot = type;
if(s->stripdata > end_buf){
av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
s->stripsizes = start + off;
}
s->strips = count;
+ s->sstype = type;
if(s->stripsizes > end_buf){
av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
return -1;
}
- if(!pic->data[0]){
- av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
- return -1;
- }
- /* now we have the data and may start decoding */
- stride = pic->linesize[0];
- dst = pic->data[0];
- for(i = 0; i < s->height; i += s->rps){
- if(s->stripsizes)
- ssize = tget(&s->stripsizes, type, s->le);
- else
- ssize = s->stripsize;
-
- if(s->stripdata){
- soff = tget(&s->stripdata, s->sot, s->le);
- }else
- soff = s->stripoff;
- src = start + soff;
- if(tiff_unpack_strip(s, dst, stride, src, ssize, FFMIN(s->rps, s->height - i)) < 0)
- break;
- dst += s->rps * stride;
- }
break;
case TIFF_PREDICTOR:
- if(!pic->data[0]){
- av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
- return -1;
- }
- if(value == 2){
- src = pic->data[0];
- stride = pic->linesize[0];
- soff = s->bpp >> 3;
- ssize = s->width * soff;
- for(i = 0; i < s->height; i++) {
- for(j = soff; j < ssize; j++)
- src[j] += src[j - soff];
- src += stride;
- }
- }
+ s->predictor = value;
break;
case TIFF_INVERT:
switch(value){
av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
return -1;
}
- pal = s->picture.data[1];
+ pal = (uint32_t *) s->picture.data[1];
off = type_sizes[type];
rp = buf;
gp = buf + count / 3 * off;
return -1;
}
break;
+ case TIFF_T4OPTIONS:
+ case TIFF_T6OPTIONS:
+ s->fax_opts = value;
+ break;
}
return 0;
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
TiffContext * const s = avctx->priv_data;
AVFrame *picture = data;
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 i, entries;
+ int i, j, entries;
+ int stride, soff, ssize;
+ uint8_t *dst;
//parse image header
id = AV_RL16(buf); buf += 2;
}
s->le = le;
s->invert = 0;
+ s->compr = TIFF_RAW;
// As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
// that further identifies the file as a TIFF file"
if(tget_short(&buf, le) != 42){
buf = orig_buf + off;
entries = tget_short(&buf, le);
for(i = 0; i < entries; i++){
- if(tiff_decode_tag(s, orig_buf, buf, end_buf, p) < 0)
+ if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
return -1;
buf += 12;
}
+ if(!s->stripdata && !s->stripoff){
+ av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
+ return -1;
+ }
+ /* now we have the data and may start decoding */
+ if(!p->data[0]){
+ av_log(s->avctx, AV_LOG_ERROR, "Picture initialization missing\n");
+ return -1;
+ }
+ if(s->strips == 1 && !s->stripsize){
+ av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
+ s->stripsize = buf_size - s->stripoff;
+ }
+ stride = p->linesize[0];
+ dst = p->data[0];
+ for(i = 0; i < s->height; i += s->rps){
+ if(s->stripsizes)
+ ssize = tget(&s->stripsizes, s->sstype, s->le);
+ else
+ ssize = s->stripsize;
+
+ if(s->stripdata){
+ soff = tget(&s->stripdata, s->sot, s->le);
+ }else
+ soff = s->stripoff;
+ if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
+ break;
+ dst += s->rps * stride;
+ }
+ if(s->predictor == 2){
+ dst = p->data[0];
+ soff = s->bpp >> 3;
+ ssize = s->width * soff;
+ for(i = 0; i < s->height; i++) {
+ for(j = soff; j < ssize; j++)
+ dst[j] += dst[j - soff];
+ dst += stride;
+ }
+ }
if(s->invert){
uint8_t *src;
return buf_size;
}
-static int tiff_init(AVCodecContext *avctx){
+static av_cold int tiff_init(AVCodecContext *avctx){
TiffContext *s = avctx->priv_data;
s->width = 0;
avctx->coded_frame= (AVFrame*)&s->picture;
s->picture.data[0] = NULL;
ff_lzw_decode_open(&s->lzw);
+ ff_ccitt_unpack_init();
return 0;
}
-static int tiff_end(AVCodecContext *avctx)
+static av_cold int tiff_end(AVCodecContext *avctx)
{
TiffContext * const s = avctx->priv_data;
tiff_end,
decode_frame,
0,
- NULL
+ NULL,
+ .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
};
projects / ffmpeg / blobdiff