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tiffdec: K&R cosmetics

tags/n0.11
Alex Converse 13 years ago
parent
cbf767a87c
commit
f346b6bbeb
1 changed files with 147 additions and 108 deletions
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  1. +147
    -108
      libavcodec/tiff.c

+ 147
- 108
libavcodec/tiff.c View File

@@ -53,35 +53,39 @@ typedef struct TiffContext {

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 unsigned tget_short(const uint8_t **p, int le) {
static unsigned tget_short(const uint8_t **p, int le)
{
unsigned v = le ? AV_RL16(*p) : AV_RB16(*p);
*p += 2;
return v;
}

static unsigned tget_long(const uint8_t **p, int le) {
static unsigned tget_long(const uint8_t **p, int le)
{
unsigned v = le ? AV_RL32(*p) : AV_RB32(*p);
*p += 4;
return v;
}

static unsigned 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);
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 = { 0 };
int zret;
@@ -102,7 +106,9 @@ static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,
}
#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) + 7) >> 3;
@@ -111,21 +117,24 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
return AVERROR_INVALIDDATA;

#if CONFIG_ZLIB
if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
uint8_t *zbuf; unsigned long outlen;
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;
@@ -134,48 +143,53 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
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((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE);
uint8_t *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_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");
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;
@@ -189,21 +203,23 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
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++;
@@ -214,8 +230,9 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uin
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;
@@ -279,7 +296,8 @@ static int init_image(TiffContext *s)
return 0;
}

static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
static int tiff_decode_tag(TiffContext *s, const uint8_t *start,
const uint8_t *buf, const uint8_t *end_buf)
{
unsigned tag, type, count, off, value = 0;
int i, j;
@@ -294,12 +312,13 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
off = tget_long(&buf, s->le);

if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n", type);
av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",
type);
return 0;
}

if(count == 1){
switch(type){
if (count == 1) {
switch (type) {
case TIFF_BYTE:
case TIFF_SHORT:
buf -= 4;
@@ -311,7 +330,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
buf = NULL;
break;
case TIFF_STRING:
if(count <= 4){
if (count <= 4) {
buf -= 4;
break;
}
@@ -327,12 +346,13 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
}
}

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;
@@ -341,20 +361,25 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
break;
case TIFF_BPP:
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);
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 && buf < end_buf; 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;
@@ -374,7 +399,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
case TIFF_COMPR:
s->compr = value;
s->predictor = 0;
switch(s->compr){
switch (s->compr) {
case TIFF_RAW:
case TIFF_PACKBITS:
case TIFF_LZW:
@@ -394,48 +419,54 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
#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 == 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;
@@ -443,7 +474,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
s->predictor = value;
break;
case TIFF_INVERT:
switch(value){
switch (value) {
case 0:
s->invert = 1;
break;
@@ -454,13 +485,15 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
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;
@@ -474,43 +507,43 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
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);
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 = &s->picture;
AVFrame *const p = &s->picture;
const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
unsigned off;
int id, le, ret;
@@ -522,10 +555,13 @@ static int decode_frame(AVCodecContext *avctx,
//parse image header
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{
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;
}
@@ -535,8 +571,9 @@ static int decode_frame(AVCodecContext *avctx,
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
@@ -549,12 +586,12 @@ static int decode_frame(AVCodecContext *avctx,
}
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;
}
@@ -562,53 +599,54 @@ static int decode_frame(AVCodecContext *avctx,
if ((ret = init_image(s)) < 0)
return ret;

if(s->strips == 1 && !s->stripsize){
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
ssize = s->stripsize;

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 > 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];
}
@@ -619,7 +657,8 @@ static int decode_frame(AVCodecContext *avctx,
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;
@@ -635,10 +674,10 @@ static av_cold int tiff_init(AVCodecContext *avctx){

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;
}


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