*/
/**
- * TIFF image decoder
* @file
+ * TIFF image decoder
* @author Konstantin Shishkov
*/
+
#include "avcodec.h"
#if CONFIG_ZLIB
#include <zlib.h>
AVFrame picture;
int width, height;
- unsigned int bpp;
+ unsigned int bpp, bppcount;
+ uint32_t palette[256];
+ int palette_is_set;
int le;
enum TiffCompr compr;
int invert;
int strips, rps, sstype;
int sot;
- const uint8_t* stripdata;
- const uint8_t* stripsizes;
+ const uint8_t *stripdata;
+ const uint8_t *stripsizes;
int stripsize, stripoff;
LZWState *lzw;
} TiffContext;
-static int tget_short(const uint8_t **p, int le){
- int v = le ? AV_RL16(*p) : AV_RB16(*p);
+static unsigned tget_short(const uint8_t **p, int le)
+{
+ unsigned v = le ? AV_RL16(*p) : AV_RB16(*p);
*p += 2;
return v;
}
-static int tget_long(const uint8_t **p, int le){
- int v = le ? AV_RL32(*p) : AV_RB32(*p);
+static unsigned tget_long(const uint8_t **p, int le)
+{
+ unsigned v = le ? AV_RL32(*p) : AV_RB32(*p);
*p += 4;
return v;
}
-static int tget(const uint8_t **p, int type, int le){
- switch(type){
+static unsigned tget(const uint8_t **p, int type, int le)
+{
+ switch (type) {
case TIFF_BYTE : return *(*p)++;
case TIFF_SHORT: return tget_short(p, le);
- case TIFF_LONG : return tget_long (p, le);
- default : return -1;
+ case TIFF_LONG : return tget_long(p, le);
+ default : return UINT_MAX;
}
}
#if CONFIG_ZLIB
-static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
+static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,
+ int size)
{
- z_stream zstream;
+ z_stream zstream = { 0 };
int zret;
- memset(&zstream, 0, sizeof(zstream));
zstream.next_in = src;
zstream.avail_in = size;
zstream.next_out = dst;
}
#endif
-static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const 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;
const uint8_t *ssrc = src;
- int width = s->width * s->bpp >> 3;
-#if CONFIG_ZLIB
- uint8_t *zbuf; unsigned long outlen;
+ int width = ((s->width * s->bpp) + 7) >> 3;
- if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
+ if (size <= 0)
+ return AVERROR_INVALIDDATA;
+
+#if CONFIG_ZLIB
+ if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
+ uint8_t *zbuf;
+ unsigned long outlen;
int ret;
outlen = width * lines;
zbuf = av_malloc(outlen);
+ if (!zbuf)
+ return AVERROR(ENOMEM);
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);
+ 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;
}
src = zbuf;
- for(line = 0; line < lines; line++){
+ for (line = 0; line < lines; line++) {
memcpy(dst, src, width);
dst += stride;
src += width;
return 0;
}
#endif
- if(s->compr == TIFF_LZW){
- if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
+ if (s->compr == TIFF_LZW) {
+ if (ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
return -1;
}
}
- if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
+ 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);
+ uint8_t *src2 = av_malloc((unsigned)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;
- }
- if(s->fax_opts & 2){
- av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
+ if (!src2) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Error allocating temporary buffer\n");
+ return AVERROR(ENOMEM);
+ }
+ if (s->fax_opts & 2) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Uncompressed fax mode is not supported (yet)\n");
av_free(src2);
return -1;
}
- if(!s->fill_order){
+ if (!s->fill_order) {
memcpy(src2, src, size);
- }else{
- for(i = 0; i < size; i++)
+ } else {
+ for (i = 0; i < size; i++)
src2[i] = av_reverse[src[i]];
}
- memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
- switch(s->compr){
+ memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+ 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, s->fax_opts);
+ ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride,
+ s->compr, s->fax_opts);
break;
}
av_free(src2);
return ret;
}
- for(line = 0; line < lines; line++){
- if(src - ssrc > size){
+ for (line = 0; line < lines; line++) {
+ if (src - ssrc > size) {
av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
return -1;
}
- switch(s->compr){
+ switch (s->compr) {
case TIFF_RAW:
+ if (ssrc + size - src < width)
+ return AVERROR_INVALIDDATA;
if (!s->fill_order) {
memcpy(dst, src, width);
} else {
src += width;
break;
case TIFF_PACKBITS:
- for(pixels = 0; pixels < width;){
- code = (int8_t)*src++;
- if(code >= 0){
+ for (pixels = 0; pixels < width;) {
+ code = (int8_t) * src++;
+ if (code >= 0) {
code++;
- if(pixels + code > width){
- av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
+ if (pixels + code > width) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Copy went out of bounds\n");
return -1;
}
memcpy(dst + pixels, src, code);
src += code;
pixels += code;
- }else if(code != -128){ // -127..-1
+ } else if (code != -128) { // -127..-1
code = (-code) + 1;
- if(pixels + code > width){
- av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
+ if (pixels + code > width) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Run went out of bounds\n");
return -1;
}
c = *src++;
break;
case TIFF_LZW:
pixels = ff_lzw_decode(s->lzw, dst, width);
- if(pixels < width){
- av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
+ if (pixels < width) {
+ av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",
+ pixels, width);
return -1;
}
break;
return 0;
}
+static int init_image(TiffContext *s)
+{
+ int i, ret;
+ uint32_t *pal;
-static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
+ switch (s->bpp * 10 + s->bppcount) {
+ case 11:
+ s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
+ break;
+ case 81:
+ s->avctx->pix_fmt = PIX_FMT_PAL8;
+ break;
+ case 243:
+ s->avctx->pix_fmt = PIX_FMT_RGB24;
+ break;
+ case 161:
+ s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
+ break;
+ case 324:
+ s->avctx->pix_fmt = PIX_FMT_RGBA;
+ break;
+ case 483:
+ s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
+ break;
+ default:
+ av_log(s->avctx, AV_LOG_ERROR,
+ "This format is not supported (bpp=%d, bppcount=%d)\n",
+ s->bpp, s->bppcount);
+ return AVERROR_INVALIDDATA;
+ }
+ if (s->width != s->avctx->width || s->height != s->avctx->height) {
+ if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
+ return ret;
+ avcodec_set_dimensions(s->avctx, s->width, s->height);
+ }
+ if (s->picture.data[0])
+ s->avctx->release_buffer(s->avctx, &s->picture);
+ if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0) {
+ av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
+ if (s->palette_is_set) {
+ memcpy(s->picture.data[1], s->palette, sizeof(s->palette));
+ } else {
+ /* make default grayscale pal */
+ pal = (uint32_t *) s->picture.data[1];
+ for (i = 0; i < 256; i++)
+ pal[i] = i * 0x010101;
+ }
+ }
+ return 0;
+}
+
+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;
+ unsigned tag, type, count, off, value = 0;
int i, j;
uint32_t *pal;
const uint8_t *rp, *gp, *bp;
+ if (end_buf - buf < 12)
+ return -1;
tag = tget_short(&buf, s->le);
type = tget_short(&buf, s->le);
count = tget_long(&buf, s->le);
off = tget_long(&buf, s->le);
- if(count == 1){
- switch(type){
+ if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
+ av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",
+ type);
+ return 0;
+ }
+
+ if (count == 1) {
+ switch (type) {
case TIFF_BYTE:
case TIFF_SHORT:
buf -= 4;
buf = NULL;
break;
case TIFF_STRING:
- if(count <= 4){
+ if (count <= 4) {
buf -= 4;
break;
}
default:
- value = -1;
+ value = UINT_MAX;
+ buf = start + off;
+ }
+ } else {
+ if (count <= 4 && type_sizes[type] * count <= 4) {
+ buf -= 4;
+ } else {
buf = start + off;
}
- }else if(type_sizes[type] * count <= 4){
- buf -= 4;
- }else{
- buf = start + off;
}
- if(buf && (buf < start || buf > end_buf)){
- av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
+ if (buf && (buf < start || buf > end_buf)) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Tag referencing position outside the image\n");
return -1;
}
- switch(tag){
+ switch (tag) {
case TIFF_WIDTH:
s->width = value;
break;
s->height = value;
break;
case TIFF_BPP:
- if(count > 4){
- av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
+ s->bppcount = count;
+ if (count > 4) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "This format is not supported (bpp=%d, %d components)\n",
+ s->bpp, count);
return -1;
}
- if(count == 1) s->bpp = value;
- else{
- switch(type){
+ if (count == 1)
+ s->bpp = value;
+ else {
+ switch (type) {
case TIFF_BYTE:
- s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
+ s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) +
+ ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
break;
case TIFF_SHORT:
case TIFF_LONG:
s->bpp = 0;
- for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
+ for (i = 0; i < count && buf < end_buf; i++)
+ s->bpp += tget(&buf, type, s->le);
break;
default:
s->bpp = -1;
}
}
- switch(s->bpp*10 + count){
- case 11:
- s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
- break;
- case 81:
- s->avctx->pix_fmt = PIX_FMT_PAL8;
- break;
- case 243:
- s->avctx->pix_fmt = PIX_FMT_RGB24;
- break;
- case 161:
- s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
- break;
- case 324:
- s->avctx->pix_fmt = PIX_FMT_RGBA;
- break;
- case 483:
- s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
- break;
- default:
- av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
- return -1;
- }
- if(s->width != s->avctx->width || s->height != s->avctx->height){
- if(av_image_check_size(s->width, s->height, 0, s->avctx))
- return -1;
- avcodec_set_dimensions(s->avctx, s->width, s->height);
- }
- if(s->picture.data[0])
- s->avctx->release_buffer(s->avctx, &s->picture);
- if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
- av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
- if(s->bpp == 8){
- /* make default grayscale pal */
- pal = (uint32_t *) s->picture.data[1];
- for(i = 0; i < 256; i++)
- pal[i] = i * 0x010101;
- }
+ break;
+ case TIFF_SAMPLES_PER_PIXEL:
+ if (count != 1) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Samples per pixel requires a single value, many provided\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (s->bppcount == 1)
+ s->bpp *= value;
+ s->bppcount = value;
break;
case TIFF_COMPR:
s->compr = value;
s->predictor = 0;
- switch(s->compr){
+ switch (s->compr) {
case TIFF_RAW:
case TIFF_PACKBITS:
case TIFF_LZW:
#endif
case TIFF_JPEG:
case TIFF_NEWJPEG:
- av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
+ av_log(s->avctx, AV_LOG_ERROR,
+ "JPEG compression is not supported\n");
return -1;
default:
- av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
+ av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
+ s->compr);
return -1;
}
break;
case TIFF_ROWSPERSTRIP:
- if(type == TIFF_LONG && value == -1)
+ if (type == TIFF_LONG && value == UINT_MAX)
value = s->avctx->height;
- if(value < 1){
- av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
+ if (value < 1) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Incorrect value of rows per strip\n");
return -1;
}
s->rps = value;
break;
case TIFF_STRIP_OFFS:
- if(count == 1){
+ if (count == 1) {
s->stripdata = NULL;
s->stripoff = value;
- }else
+ } else
s->stripdata = start + off;
s->strips = count;
- if(s->strips == 1) s->rps = s->height;
+ 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");
+ if (s->stripdata > end_buf) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Tag referencing position outside the image\n");
return -1;
}
break;
case TIFF_STRIP_SIZE:
- if(count == 1){
+ if (count == 1) {
s->stripsizes = NULL;
s->stripsize = value;
s->strips = 1;
- }else{
+ } else {
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");
+ if (s->stripsizes > end_buf) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Tag referencing position outside the image\n");
return -1;
}
break;
s->predictor = value;
break;
case TIFF_INVERT:
- switch(value){
+ switch (value) {
case 0:
s->invert = 1;
break;
case 3:
break;
default:
- av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
+ av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n",
+ value);
return -1;
}
break;
case TIFF_FILL_ORDER:
- if(value < 1 || value > 2){
- av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
+ if (value < 1 || value > 2) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Unknown FillOrder value %d, trying default one\n", value);
value = 1;
}
s->fill_order = value - 1;
break;
case TIFF_PAL:
- if(s->avctx->pix_fmt != PIX_FMT_PAL8){
- av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
- return -1;
- }
- pal = (uint32_t *) s->picture.data[1];
+ pal = (uint32_t *) s->palette;
off = type_sizes[type];
+ if (count / 3 > 256 || end_buf - buf < count / 3 * off * 3)
+ return -1;
rp = buf;
gp = buf + count / 3 * off;
bp = buf + count / 3 * off * 2;
off = (type_sizes[type] - 1) << 3;
- for(i = 0; i < count / 3; i++){
- j = (tget(&rp, type, s->le) >> off) << 16;
+ for (i = 0; i < count / 3; i++) {
+ j = (tget(&rp, type, s->le) >> off) << 16;
j |= (tget(&gp, type, s->le) >> off) << 8;
- j |= tget(&bp, type, s->le) >> off;
+ j |= tget(&bp, type, s->le) >> off;
pal[i] = j;
}
+ s->palette_is_set = 1;
break;
case TIFF_PLANAR:
- if(value == 2){
+ if (value == 2) {
av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
return -1;
}
break;
case TIFF_T4OPTIONS:
- if(s->compr == TIFF_G3)
+ if (s->compr == TIFF_G3)
s->fax_opts = value;
break;
case TIFF_T6OPTIONS:
- if(s->compr == TIFF_G4)
+ if (s->compr == TIFF_G4)
s->fax_opts = value;
break;
+ default:
+ av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",
+ tag, tag);
}
return 0;
}
static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- AVPacket *avpkt)
+ void *data, int *data_size, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
- TiffContext * const s = avctx->priv_data;
+ TiffContext *const s = avctx->priv_data;
AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&s->picture;
+ AVFrame *const p = &s->picture;
const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
- int id, le, off;
+ unsigned off;
+ int id, le, ret;
int i, j, entries;
- int stride, soff, ssize;
+ int stride;
+ unsigned soff, ssize;
uint8_t *dst;
//parse image header
- id = AV_RL16(buf); buf += 2;
- if(id == 0x4949) le = 1;
- else if(id == 0x4D4D) le = 0;
- else{
+ if (end_buf - buf < 8)
+ return AVERROR_INVALIDDATA;
+ id = AV_RL16(buf);
+ buf += 2;
+ if (id == 0x4949)
+ le = 1;
+ else if (id == 0x4D4D)
+ le = 0;
+ else {
av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
return -1;
}
s->fill_order = 0;
// 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){
- av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
+ if (tget_short(&buf, le) != 42) {
+ av_log(avctx, AV_LOG_ERROR,
+ "The answer to life, universe and everything is not correct!\n");
return -1;
}
+ // Reset these pointers so we can tell if they were set this frame
+ s->stripsizes = s->stripdata = NULL;
/* parse image file directory */
off = tget_long(&buf, le);
- if(orig_buf + off + 14 >= end_buf){
+ if (off >= UINT_MAX - 14 || end_buf - orig_buf < off + 14) {
av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
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) < 0)
+ for (i = 0; i < entries; i++) {
+ if (tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
return -1;
buf += 12;
}
- if(!s->stripdata && !s->stripoff){
+ 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]){
- s->bpp = 1;
- avctx->pix_fmt = PIX_FMT_MONOBLACK;
- if(s->width != s->avctx->width || s->height != s->avctx->height){
- if(av_image_check_size(s->width, s->height, 0, s->avctx))
- return -1;
- avcodec_set_dimensions(s->avctx, s->width, s->height);
- }
- if(s->picture.data[0])
- s->avctx->release_buffer(s->avctx, &s->picture);
- if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
- av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
- }
- if(s->strips == 1 && !s->stripsize){
+ if ((ret = init_image(s)) < 0)
+ return ret;
+
+ 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)
+ for (i = 0; i < s->height; i += s->rps) {
+ if (s->stripsizes) {
+ if (s->stripsizes >= end_buf)
+ return AVERROR_INVALIDDATA;
ssize = tget(&s->stripsizes, s->sstype, s->le);
- else
+ } else
ssize = s->stripsize;
- if (ssize > buf_size) {
- av_log(avctx, AV_LOG_ERROR, "Buffer size is smaller than strip size\n");
- return -1;
- }
-
- if(s->stripdata){
+ if (s->stripdata) {
+ if (s->stripdata >= end_buf)
+ return AVERROR_INVALIDDATA;
soff = tget(&s->stripdata, s->sot, s->le);
- }else
+ } else
soff = s->stripoff;
- if (soff < 0) {
- av_log(avctx, AV_LOG_ERROR, "Invalid stripoff: %d\n", soff);
- return AVERROR(EINVAL);
+
+ if (soff > buf_size || ssize > buf_size - soff) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
+ return -1;
}
- if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
+ 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){
+ 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++)
+ for (i = 0; i < s->height; i++) {
+ for (j = soff; j < ssize; j++)
dst[j] += dst[j - soff];
dst += stride;
}
}
- if(s->invert){
+ if (s->invert) {
uint8_t *src;
int j;
src = s->picture.data[0];
- for(j = 0; j < s->height; j++){
- for(i = 0; i < s->picture.linesize[0]; i++)
+ for (j = 0; j < s->height; j++) {
+ for (i = 0; i < s->picture.linesize[0]; i++)
src[i] = 255 - src[i];
src += s->picture.linesize[0];
}
}
- *picture= *(AVFrame*)&s->picture;
+ *picture = s->picture;
*data_size = sizeof(AVPicture);
return buf_size;
}
-static av_cold int tiff_init(AVCodecContext *avctx){
+static av_cold int tiff_init(AVCodecContext *avctx)
+{
TiffContext *s = avctx->priv_data;
s->width = 0;
s->height = 0;
s->avctx = avctx;
- avcodec_get_frame_defaults((AVFrame*)&s->picture);
- avctx->coded_frame= (AVFrame*)&s->picture;
+ avcodec_get_frame_defaults(&s->picture);
+ avctx->coded_frame = &s->picture;
ff_lzw_decode_open(&s->lzw);
ff_ccitt_unpack_init();
static av_cold int tiff_end(AVCodecContext *avctx)
{
- TiffContext * const s = avctx->priv_data;
+ TiffContext *const s = avctx->priv_data;
ff_lzw_decode_close(&s->lzw);
- if(s->picture.data[0])
+ if (s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
return 0;
}
AVCodec ff_tiff_decoder = {
- "tiff",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_TIFF,
- sizeof(TiffContext),
- tiff_init,
- NULL,
- tiff_end,
- decode_frame,
- CODEC_CAP_DR1,
- NULL,
- .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
+ .name = "tiff",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_TIFF,
+ .priv_data_size = sizeof(TiffContext),
+ .init = tiff_init,
+ .close = tiff_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
};
projects / ffmpeg / blobdiff