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00027 #include "avcodec.h"
00028 #if CONFIG_ZLIB
00029 #include <zlib.h>
00030 #endif
00031 #include "lzw.h"
00032 #include "tiff.h"
00033 #include "faxcompr.h"
00034 #include "libavutil/common.h"
00035 #include "libavutil/intreadwrite.h"
00036 #include "libavutil/imgutils.h"
00037
00038 typedef struct TiffContext {
00039 AVCodecContext *avctx;
00040 AVFrame picture;
00041
00042 int width, height;
00043 unsigned int bpp;
00044 int le;
00045 int compr;
00046 int invert;
00047 int fax_opts;
00048 int predictor;
00049 int fill_order;
00050
00051 int strips, rps, sstype;
00052 int sot;
00053 const uint8_t* stripdata;
00054 const uint8_t* stripsizes;
00055 int stripsize, stripoff;
00056 LZWState *lzw;
00057 } TiffContext;
00058
00059 static int tget_short(const uint8_t **p, int le){
00060 int v = le ? AV_RL16(*p) : AV_RB16(*p);
00061 *p += 2;
00062 return v;
00063 }
00064
00065 static int tget_long(const uint8_t **p, int le){
00066 int v = le ? AV_RL32(*p) : AV_RB32(*p);
00067 *p += 4;
00068 return v;
00069 }
00070
00071 static int tget(const uint8_t **p, int type, int le){
00072 switch(type){
00073 case TIFF_BYTE : return *(*p)++;
00074 case TIFF_SHORT: return tget_short(p, le);
00075 case TIFF_LONG : return tget_long (p, le);
00076 default : return -1;
00077 }
00078 }
00079
00080 #if CONFIG_ZLIB
00081 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
00082 {
00083 z_stream zstream;
00084 int zret;
00085
00086 memset(&zstream, 0, sizeof(zstream));
00087 zstream.next_in = src;
00088 zstream.avail_in = size;
00089 zstream.next_out = dst;
00090 zstream.avail_out = *len;
00091 zret = inflateInit(&zstream);
00092 if (zret != Z_OK) {
00093 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
00094 return zret;
00095 }
00096 zret = inflate(&zstream, Z_SYNC_FLUSH);
00097 inflateEnd(&zstream);
00098 *len = zstream.total_out;
00099 return zret == Z_STREAM_END ? Z_OK : zret;
00100 }
00101 #endif
00102
00103 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
00104 int c, line, pixels, code;
00105 const uint8_t *ssrc = src;
00106 int width = s->width * s->bpp >> 3;
00107 #if CONFIG_ZLIB
00108 uint8_t *zbuf; unsigned long outlen;
00109
00110 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
00111 int ret;
00112 outlen = width * lines;
00113 zbuf = av_malloc(outlen);
00114 ret = tiff_uncompress(zbuf, &outlen, src, size);
00115 if(ret != Z_OK){
00116 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
00117 av_free(zbuf);
00118 return -1;
00119 }
00120 src = zbuf;
00121 for(line = 0; line < lines; line++){
00122 memcpy(dst, src, width);
00123 dst += stride;
00124 src += width;
00125 }
00126 av_free(zbuf);
00127 return 0;
00128 }
00129 #endif
00130 if(s->compr == TIFF_LZW){
00131 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
00132 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
00133 return -1;
00134 }
00135 }
00136 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
00137 int i, ret = 0;
00138 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
00139
00140 if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
00141 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
00142 return -1;
00143 }
00144 if(s->fax_opts & 2){
00145 av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
00146 av_free(src2);
00147 return -1;
00148 }
00149 if(!s->fill_order){
00150 memcpy(src2, src, size);
00151 }else{
00152 for(i = 0; i < size; i++)
00153 src2[i] = av_reverse[src[i]];
00154 }
00155 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00156 switch(s->compr){
00157 case TIFF_CCITT_RLE:
00158 case TIFF_G3:
00159 case TIFF_G4:
00160 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
00161 break;
00162 }
00163 av_free(src2);
00164 return ret;
00165 }
00166 for(line = 0; line < lines; line++){
00167 if(src - ssrc > size){
00168 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
00169 return -1;
00170 }
00171 switch(s->compr){
00172 case TIFF_RAW:
00173 memcpy(dst, src, width);
00174 src += width;
00175 break;
00176 case TIFF_PACKBITS:
00177 for(pixels = 0; pixels < width;){
00178 code = (int8_t)*src++;
00179 if(code >= 0){
00180 code++;
00181 if(pixels + code > width){
00182 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
00183 return -1;
00184 }
00185 memcpy(dst + pixels, src, code);
00186 src += code;
00187 pixels += code;
00188 }else if(code != -128){
00189 code = (-code) + 1;
00190 if(pixels + code > width){
00191 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
00192 return -1;
00193 }
00194 c = *src++;
00195 memset(dst + pixels, c, code);
00196 pixels += code;
00197 }
00198 }
00199 break;
00200 case TIFF_LZW:
00201 pixels = ff_lzw_decode(s->lzw, dst, width);
00202 if(pixels < width){
00203 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
00204 return -1;
00205 }
00206 break;
00207 }
00208 dst += stride;
00209 }
00210 return 0;
00211 }
00212
00213
00214 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
00215 {
00216 int tag, type, count, off, value = 0;
00217 int i, j;
00218 uint32_t *pal;
00219 const uint8_t *rp, *gp, *bp;
00220
00221 tag = tget_short(&buf, s->le);
00222 type = tget_short(&buf, s->le);
00223 count = tget_long(&buf, s->le);
00224 off = tget_long(&buf, s->le);
00225
00226 if(count == 1){
00227 switch(type){
00228 case TIFF_BYTE:
00229 case TIFF_SHORT:
00230 buf -= 4;
00231 value = tget(&buf, type, s->le);
00232 buf = NULL;
00233 break;
00234 case TIFF_LONG:
00235 value = off;
00236 buf = NULL;
00237 break;
00238 case TIFF_STRING:
00239 if(count <= 4){
00240 buf -= 4;
00241 break;
00242 }
00243 default:
00244 value = -1;
00245 buf = start + off;
00246 }
00247 }else if(type_sizes[type] * count <= 4){
00248 buf -= 4;
00249 }else{
00250 buf = start + off;
00251 }
00252
00253 if(buf && (buf < start || buf > end_buf)){
00254 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
00255 return -1;
00256 }
00257
00258 switch(tag){
00259 case TIFF_WIDTH:
00260 s->width = value;
00261 break;
00262 case TIFF_HEIGHT:
00263 s->height = value;
00264 break;
00265 case TIFF_BPP:
00266 if(count > 4){
00267 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
00268 return -1;
00269 }
00270 if(count == 1) s->bpp = value;
00271 else{
00272 switch(type){
00273 case TIFF_BYTE:
00274 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
00275 break;
00276 case TIFF_SHORT:
00277 case TIFF_LONG:
00278 s->bpp = 0;
00279 for(i = 0; i < count; i++) s->bpp += tget(&buf, type, s->le);
00280 break;
00281 default:
00282 s->bpp = -1;
00283 }
00284 }
00285 switch(s->bpp*10 + count){
00286 case 11:
00287 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
00288 break;
00289 case 81:
00290 s->avctx->pix_fmt = PIX_FMT_PAL8;
00291 break;
00292 case 243:
00293 s->avctx->pix_fmt = PIX_FMT_RGB24;
00294 break;
00295 case 161:
00296 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
00297 break;
00298 case 324:
00299 s->avctx->pix_fmt = PIX_FMT_RGBA;
00300 break;
00301 case 483:
00302 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
00303 break;
00304 default:
00305 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
00306 return -1;
00307 }
00308 if(s->width != s->avctx->width || s->height != s->avctx->height){
00309 if(av_image_check_size(s->width, s->height, 0, s->avctx))
00310 return -1;
00311 avcodec_set_dimensions(s->avctx, s->width, s->height);
00312 }
00313 if(s->picture.data[0])
00314 s->avctx->release_buffer(s->avctx, &s->picture);
00315 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
00316 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00317 return -1;
00318 }
00319 if(s->bpp == 8){
00320
00321 pal = (uint32_t *) s->picture.data[1];
00322 for(i = 0; i < 256; i++)
00323 pal[i] = i * 0x010101;
00324 }
00325 break;
00326 case TIFF_COMPR:
00327 s->compr = value;
00328 s->predictor = 0;
00329 switch(s->compr){
00330 case TIFF_RAW:
00331 case TIFF_PACKBITS:
00332 case TIFF_LZW:
00333 case TIFF_CCITT_RLE:
00334 break;
00335 case TIFF_G3:
00336 case TIFF_G4:
00337 s->fax_opts = 0;
00338 break;
00339 case TIFF_DEFLATE:
00340 case TIFF_ADOBE_DEFLATE:
00341 #if CONFIG_ZLIB
00342 break;
00343 #else
00344 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
00345 return -1;
00346 #endif
00347 case TIFF_JPEG:
00348 case TIFF_NEWJPEG:
00349 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
00350 return -1;
00351 default:
00352 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
00353 return -1;
00354 }
00355 break;
00356 case TIFF_ROWSPERSTRIP:
00357 if(type == TIFF_LONG && value == -1)
00358 value = s->avctx->height;
00359 if(value < 1){
00360 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
00361 return -1;
00362 }
00363 s->rps = value;
00364 break;
00365 case TIFF_STRIP_OFFS:
00366 if(count == 1){
00367 s->stripdata = NULL;
00368 s->stripoff = value;
00369 }else
00370 s->stripdata = start + off;
00371 s->strips = count;
00372 if(s->strips == 1) s->rps = s->height;
00373 s->sot = type;
00374 if(s->stripdata > end_buf){
00375 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
00376 return -1;
00377 }
00378 break;
00379 case TIFF_STRIP_SIZE:
00380 if(count == 1){
00381 s->stripsizes = NULL;
00382 s->stripsize = value;
00383 s->strips = 1;
00384 }else{
00385 s->stripsizes = start + off;
00386 }
00387 s->strips = count;
00388 s->sstype = type;
00389 if(s->stripsizes > end_buf){
00390 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
00391 return -1;
00392 }
00393 break;
00394 case TIFF_PREDICTOR:
00395 s->predictor = value;
00396 break;
00397 case TIFF_INVERT:
00398 switch(value){
00399 case 0:
00400 s->invert = 1;
00401 break;
00402 case 1:
00403 s->invert = 0;
00404 break;
00405 case 2:
00406 case 3:
00407 break;
00408 default:
00409 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
00410 return -1;
00411 }
00412 break;
00413 case TIFF_FILL_ORDER:
00414 if(value < 1 || value > 2){
00415 av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
00416 value = 1;
00417 }
00418 s->fill_order = value - 1;
00419 break;
00420 case TIFF_PAL:
00421 if(s->avctx->pix_fmt != PIX_FMT_PAL8){
00422 av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
00423 return -1;
00424 }
00425 pal = (uint32_t *) s->picture.data[1];
00426 off = type_sizes[type];
00427 rp = buf;
00428 gp = buf + count / 3 * off;
00429 bp = buf + count / 3 * off * 2;
00430 off = (type_sizes[type] - 1) << 3;
00431 for(i = 0; i < count / 3; i++){
00432 j = (tget(&rp, type, s->le) >> off) << 16;
00433 j |= (tget(&gp, type, s->le) >> off) << 8;
00434 j |= tget(&bp, type, s->le) >> off;
00435 pal[i] = j;
00436 }
00437 break;
00438 case TIFF_PLANAR:
00439 if(value == 2){
00440 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
00441 return -1;
00442 }
00443 break;
00444 case TIFF_T4OPTIONS:
00445 if(s->compr == TIFF_G3)
00446 s->fax_opts = value;
00447 break;
00448 case TIFF_T6OPTIONS:
00449 if(s->compr == TIFF_G4)
00450 s->fax_opts = value;
00451 break;
00452 }
00453 return 0;
00454 }
00455
00456 static int decode_frame(AVCodecContext *avctx,
00457 void *data, int *data_size,
00458 AVPacket *avpkt)
00459 {
00460 const uint8_t *buf = avpkt->data;
00461 int buf_size = avpkt->size;
00462 TiffContext * const s = avctx->priv_data;
00463 AVFrame *picture = data;
00464 AVFrame * const p= (AVFrame*)&s->picture;
00465 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
00466 int id, le, off;
00467 int i, j, entries;
00468 int stride, soff, ssize;
00469 uint8_t *dst;
00470
00471
00472 id = AV_RL16(buf); buf += 2;
00473 if(id == 0x4949) le = 1;
00474 else if(id == 0x4D4D) le = 0;
00475 else{
00476 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
00477 return -1;
00478 }
00479 s->le = le;
00480 s->invert = 0;
00481 s->compr = TIFF_RAW;
00482 s->fill_order = 0;
00483
00484
00485 if(tget_short(&buf, le) != 42){
00486 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
00487 return -1;
00488 }
00489
00490 off = tget_long(&buf, le);
00491 if(orig_buf + off + 14 >= end_buf){
00492 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
00493 return -1;
00494 }
00495 buf = orig_buf + off;
00496 entries = tget_short(&buf, le);
00497 for(i = 0; i < entries; i++){
00498 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
00499 return -1;
00500 buf += 12;
00501 }
00502 if(!s->stripdata && !s->stripoff){
00503 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
00504 return -1;
00505 }
00506
00507 if(!p->data[0]){
00508 s->bpp = 1;
00509 avctx->pix_fmt = PIX_FMT_MONOBLACK;
00510 if(s->width != s->avctx->width || s->height != s->avctx->height){
00511 if(av_image_check_size(s->width, s->height, 0, s->avctx))
00512 return -1;
00513 avcodec_set_dimensions(s->avctx, s->width, s->height);
00514 }
00515 if(s->picture.data[0])
00516 s->avctx->release_buffer(s->avctx, &s->picture);
00517 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
00518 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00519 return -1;
00520 }
00521 }
00522 if(s->strips == 1 && !s->stripsize){
00523 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
00524 s->stripsize = buf_size - s->stripoff;
00525 }
00526 stride = p->linesize[0];
00527 dst = p->data[0];
00528 for(i = 0; i < s->height; i += s->rps){
00529 if(s->stripsizes)
00530 ssize = tget(&s->stripsizes, s->sstype, s->le);
00531 else
00532 ssize = s->stripsize;
00533
00534 if (ssize > buf_size) {
00535 av_log(avctx, AV_LOG_ERROR, "Buffer size is smaller than strip size\n");
00536 return -1;
00537 }
00538
00539 if(s->stripdata){
00540 soff = tget(&s->stripdata, s->sot, s->le);
00541 }else
00542 soff = s->stripoff;
00543 if (soff < 0) {
00544 av_log(avctx, AV_LOG_ERROR, "Invalid stripoff: %d\n", soff);
00545 return AVERROR(EINVAL);
00546 }
00547 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
00548 break;
00549 dst += s->rps * stride;
00550 }
00551 if(s->predictor == 2){
00552 dst = p->data[0];
00553 soff = s->bpp >> 3;
00554 ssize = s->width * soff;
00555 for(i = 0; i < s->height; i++) {
00556 for(j = soff; j < ssize; j++)
00557 dst[j] += dst[j - soff];
00558 dst += stride;
00559 }
00560 }
00561
00562 if(s->invert){
00563 uint8_t *src;
00564 int j;
00565
00566 src = s->picture.data[0];
00567 for(j = 0; j < s->height; j++){
00568 for(i = 0; i < s->picture.linesize[0]; i++)
00569 src[i] = 255 - src[i];
00570 src += s->picture.linesize[0];
00571 }
00572 }
00573 *picture= *(AVFrame*)&s->picture;
00574 *data_size = sizeof(AVPicture);
00575
00576 return buf_size;
00577 }
00578
00579 static av_cold int tiff_init(AVCodecContext *avctx){
00580 TiffContext *s = avctx->priv_data;
00581
00582 s->width = 0;
00583 s->height = 0;
00584 s->avctx = avctx;
00585 avcodec_get_frame_defaults((AVFrame*)&s->picture);
00586 avctx->coded_frame= (AVFrame*)&s->picture;
00587 ff_lzw_decode_open(&s->lzw);
00588 ff_ccitt_unpack_init();
00589
00590 return 0;
00591 }
00592
00593 static av_cold int tiff_end(AVCodecContext *avctx)
00594 {
00595 TiffContext * const s = avctx->priv_data;
00596
00597 ff_lzw_decode_close(&s->lzw);
00598 if(s->picture.data[0])
00599 avctx->release_buffer(avctx, &s->picture);
00600 return 0;
00601 }
00602
00603 AVCodec ff_tiff_decoder = {
00604 "tiff",
00605 AVMEDIA_TYPE_VIDEO,
00606 CODEC_ID_TIFF,
00607 sizeof(TiffContext),
00608 tiff_init,
00609 NULL,
00610 tiff_end,
00611 decode_frame,
00612 CODEC_CAP_DR1,
00613 NULL,
00614 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
00615 };