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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, bppcount;
00044 uint32_t palette[256];
00045 int palette_is_set;
00046 int le;
00047 enum TiffCompr compr;
00048 int invert;
00049 int fax_opts;
00050 int predictor;
00051 int fill_order;
00052
00053 int strips, rps, sstype;
00054 int sot;
00055 const uint8_t* stripdata;
00056 const uint8_t* stripsizes;
00057 int stripsize, stripoff;
00058 LZWState *lzw;
00059 } TiffContext;
00060
00061 static unsigned tget_short(const uint8_t **p, int le) {
00062 unsigned v = le ? AV_RL16(*p) : AV_RB16(*p);
00063 *p += 2;
00064 return v;
00065 }
00066
00067 static unsigned tget_long(const uint8_t **p, int le) {
00068 unsigned v = le ? AV_RL32(*p) : AV_RB32(*p);
00069 *p += 4;
00070 return v;
00071 }
00072
00073 static unsigned tget(const uint8_t **p, int type, int le) {
00074 switch(type){
00075 case TIFF_BYTE : return *(*p)++;
00076 case TIFF_SHORT: return tget_short(p, le);
00077 case TIFF_LONG : return tget_long (p, le);
00078 default : return UINT_MAX;
00079 }
00080 }
00081
00082 #if CONFIG_ZLIB
00083 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
00084 {
00085 z_stream zstream;
00086 int zret;
00087
00088 memset(&zstream, 0, sizeof(zstream));
00089 zstream.next_in = src;
00090 zstream.avail_in = size;
00091 zstream.next_out = dst;
00092 zstream.avail_out = *len;
00093 zret = inflateInit(&zstream);
00094 if (zret != Z_OK) {
00095 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
00096 return zret;
00097 }
00098 zret = inflate(&zstream, Z_SYNC_FLUSH);
00099 inflateEnd(&zstream);
00100 *len = zstream.total_out;
00101 return zret == Z_STREAM_END ? Z_OK : zret;
00102 }
00103 #endif
00104
00105 static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
00106 int usePtr, const uint8_t *src,
00107 uint8_t c, int width, int offset)
00108 {
00109 switch (bpp) {
00110 case 1:
00111 while (--width >= 0) {
00112 dst[(width+offset)*8+7] = (usePtr ? src[width] : c) & 0x1;
00113 dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;
00114 dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;
00115 dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;
00116 dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;
00117 dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;
00118 dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;
00119 dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;
00120 }
00121 break;
00122 case 2:
00123 while (--width >= 0) {
00124 dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;
00125 dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;
00126 dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;
00127 dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;
00128 }
00129 break;
00130 case 4:
00131 while (--width >= 0) {
00132 dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;
00133 dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;
00134 }
00135 break;
00136 default:
00137 if (usePtr) {
00138 memcpy(dst + offset, src, width);
00139 } else {
00140 memset(dst + offset, c, width);
00141 }
00142 }
00143 }
00144
00145 static int tiff_unpack_strip(TiffContext *s, uint8_t* dst, int stride, const uint8_t *src, int size, int lines){
00146 int c, line, pixels, code;
00147 const uint8_t *ssrc = src;
00148 int width = ((s->width * s->bpp) + 7) >> 3;
00149 #if CONFIG_ZLIB
00150 uint8_t *zbuf; unsigned long outlen;
00151
00152 if(s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE){
00153 int ret;
00154 outlen = width * lines;
00155 zbuf = av_malloc(outlen);
00156 ret = tiff_uncompress(zbuf, &outlen, src, size);
00157 if(ret != Z_OK){
00158 av_log(s->avctx, AV_LOG_ERROR, "Uncompressing failed (%lu of %lu) with error %d\n", outlen, (unsigned long)width * lines, ret);
00159 av_free(zbuf);
00160 return -1;
00161 }
00162 src = zbuf;
00163 for(line = 0; line < lines; line++){
00164 if(s->bpp < 8 && s->avctx->pix_fmt == PIX_FMT_PAL8){
00165 horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
00166 }else{
00167 memcpy(dst, src, width);
00168 }
00169 dst += stride;
00170 src += width;
00171 }
00172 av_free(zbuf);
00173 return 0;
00174 }
00175 #endif
00176 if(s->compr == TIFF_LZW){
00177 if(ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0){
00178 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
00179 return -1;
00180 }
00181 }
00182 if(s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 || s->compr == TIFF_G4){
00183 int i, ret = 0;
00184 uint8_t *src2 = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
00185
00186 if(!src2 || (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE < (unsigned)size){
00187 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
00188 return -1;
00189 }
00190 if(s->fax_opts & 2){
00191 av_log(s->avctx, AV_LOG_ERROR, "Uncompressed fax mode is not supported (yet)\n");
00192 av_free(src2);
00193 return -1;
00194 }
00195 if(!s->fill_order){
00196 memcpy(src2, src, size);
00197 }else{
00198 for(i = 0; i < size; i++)
00199 src2[i] = av_reverse[src[i]];
00200 }
00201 memset(src2+size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00202 switch(s->compr){
00203 case TIFF_CCITT_RLE:
00204 case TIFF_G3:
00205 case TIFF_G4:
00206 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, s->compr, s->fax_opts);
00207 break;
00208 }
00209 if (s->bpp < 8 && s->avctx->pix_fmt == PIX_FMT_PAL8)
00210 for (line = 0; line < lines; line++) {
00211 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
00212 dst += stride;
00213 }
00214 av_free(src2);
00215 return ret;
00216 }
00217 for(line = 0; line < lines; line++){
00218 if(src - ssrc > size){
00219 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
00220 return -1;
00221 }
00222 switch(s->compr){
00223 case TIFF_RAW:
00224 if (ssrc + size - src < width)
00225 return AVERROR_INVALIDDATA;
00226 if (!s->fill_order) {
00227 horizontal_fill(s->bpp * (s->avctx->pix_fmt == PIX_FMT_PAL8),
00228 dst, 1, src, 0, width, 0);
00229 } else {
00230 int i;
00231 for (i = 0; i < width; i++)
00232 dst[i] = av_reverse[src[i]];
00233 }
00234 src += width;
00235 break;
00236 case TIFF_PACKBITS:
00237 for(pixels = 0; pixels < width;){
00238 code = (int8_t)*src++;
00239 if(code >= 0){
00240 code++;
00241 if(pixels + code > width){
00242 av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n");
00243 return -1;
00244 }
00245 horizontal_fill(s->bpp * (s->avctx->pix_fmt == PIX_FMT_PAL8),
00246 dst, 1, src, 0, code, pixels);
00247 src += code;
00248 pixels += code;
00249 }else if(code != -128){
00250 code = (-code) + 1;
00251 if(pixels + code > width){
00252 av_log(s->avctx, AV_LOG_ERROR, "Run went out of bounds\n");
00253 return -1;
00254 }
00255 c = *src++;
00256 horizontal_fill(s->bpp * (s->avctx->pix_fmt == PIX_FMT_PAL8),
00257 dst, 0, NULL, c, code, pixels);
00258 pixels += code;
00259 }
00260 }
00261 break;
00262 case TIFF_LZW:
00263 pixels = ff_lzw_decode(s->lzw, dst, width);
00264 if(pixels < width){
00265 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", pixels, width);
00266 return -1;
00267 }
00268 if (s->bpp < 8 && s->avctx->pix_fmt == PIX_FMT_PAL8)
00269 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
00270 break;
00271 }
00272 dst += stride;
00273 }
00274 return 0;
00275 }
00276
00277 static int init_image(TiffContext *s)
00278 {
00279 int i, ret;
00280 uint32_t *pal;
00281
00282 switch (s->bpp * 10 + s->bppcount) {
00283 case 11:
00284 if (!s->palette_is_set) {
00285 s->avctx->pix_fmt = PIX_FMT_MONOBLACK;
00286 break;
00287 }
00288 case 21:
00289 case 41:
00290 case 81:
00291 s->avctx->pix_fmt = PIX_FMT_PAL8;
00292 break;
00293 case 243:
00294 s->avctx->pix_fmt = PIX_FMT_RGB24;
00295 break;
00296 case 161:
00297 s->avctx->pix_fmt = PIX_FMT_GRAY16BE;
00298 break;
00299 case 162:
00300 s->avctx->pix_fmt = PIX_FMT_GRAY8A;
00301 break;
00302 case 324:
00303 s->avctx->pix_fmt = PIX_FMT_RGBA;
00304 break;
00305 case 483:
00306 s->avctx->pix_fmt = s->le ? PIX_FMT_RGB48LE : PIX_FMT_RGB48BE;
00307 break;
00308 case 644:
00309 s->avctx->pix_fmt = s->le ? PIX_FMT_RGBA64LE : PIX_FMT_RGBA64BE;
00310 break;
00311 default:
00312 av_log(s->avctx, AV_LOG_ERROR,
00313 "This format is not supported (bpp=%d, bppcount=%d)\n",
00314 s->bpp, s->bppcount);
00315 return AVERROR_INVALIDDATA;
00316 }
00317 if (s->width != s->avctx->width || s->height != s->avctx->height) {
00318 if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
00319 return ret;
00320 avcodec_set_dimensions(s->avctx, s->width, s->height);
00321 }
00322 if (s->picture.data[0])
00323 s->avctx->release_buffer(s->avctx, &s->picture);
00324 if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0) {
00325 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
00326 return ret;
00327 }
00328 if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
00329 if (s->palette_is_set) {
00330 memcpy(s->picture.data[1], s->palette, sizeof(s->palette));
00331 } else {
00332
00333 pal = (uint32_t *) s->picture.data[1];
00334 for (i = 0; i < 1<<s->bpp; i++)
00335 pal[i] = 0xFF << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101;
00336 }
00337 }
00338 return 0;
00339 }
00340
00341 static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *buf, const uint8_t *end_buf)
00342 {
00343 unsigned tag, type, count, off, value = 0;
00344 int i, j;
00345 uint32_t *pal;
00346 const uint8_t *rp, *gp, *bp;
00347
00348 if (end_buf - buf < 12)
00349 return -1;
00350 tag = tget_short(&buf, s->le);
00351 type = tget_short(&buf, s->le);
00352 count = tget_long(&buf, s->le);
00353 off = tget_long(&buf, s->le);
00354
00355 if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
00356 av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n", type);
00357 return 0;
00358 }
00359
00360 if(count == 1){
00361 switch(type){
00362 case TIFF_BYTE:
00363 case TIFF_SHORT:
00364 buf -= 4;
00365 value = tget(&buf, type, s->le);
00366 buf = NULL;
00367 break;
00368 case TIFF_LONG:
00369 value = off;
00370 buf = NULL;
00371 break;
00372 case TIFF_STRING:
00373 if(count <= 4){
00374 buf -= 4;
00375 break;
00376 }
00377 default:
00378 value = UINT_MAX;
00379 buf = start + off;
00380 }
00381 } else {
00382 if (count <= 4 && type_sizes[type] * count <= 4) {
00383 buf -= 4;
00384 } else {
00385 buf = start + off;
00386 }
00387 }
00388
00389 if(buf && (buf < start || buf > end_buf)){
00390 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
00391 return -1;
00392 }
00393
00394 switch(tag){
00395 case TIFF_WIDTH:
00396 s->width = value;
00397 break;
00398 case TIFF_HEIGHT:
00399 s->height = value;
00400 break;
00401 case TIFF_BPP:
00402 s->bppcount = count;
00403 if(count > 4){
00404 av_log(s->avctx, AV_LOG_ERROR, "This format is not supported (bpp=%d, %d components)\n", s->bpp, count);
00405 return -1;
00406 }
00407 if(count == 1) s->bpp = value;
00408 else{
00409 switch(type){
00410 case TIFF_BYTE:
00411 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
00412 break;
00413 case TIFF_SHORT:
00414 case TIFF_LONG:
00415 s->bpp = 0;
00416 for(i = 0; i < count && buf < end_buf; i++) s->bpp += tget(&buf, type, s->le);
00417 break;
00418 default:
00419 s->bpp = -1;
00420 }
00421 }
00422 break;
00423 case TIFF_SAMPLES_PER_PIXEL:
00424 if (count != 1) {
00425 av_log(s->avctx, AV_LOG_ERROR,
00426 "Samples per pixel requires a single value, many provided\n");
00427 return AVERROR_INVALIDDATA;
00428 }
00429 if (s->bppcount == 1)
00430 s->bpp *= value;
00431 s->bppcount = value;
00432 break;
00433 case TIFF_COMPR:
00434 s->compr = value;
00435 s->predictor = 0;
00436 switch(s->compr){
00437 case TIFF_RAW:
00438 case TIFF_PACKBITS:
00439 case TIFF_LZW:
00440 case TIFF_CCITT_RLE:
00441 break;
00442 case TIFF_G3:
00443 case TIFF_G4:
00444 s->fax_opts = 0;
00445 break;
00446 case TIFF_DEFLATE:
00447 case TIFF_ADOBE_DEFLATE:
00448 #if CONFIG_ZLIB
00449 break;
00450 #else
00451 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
00452 return -1;
00453 #endif
00454 case TIFF_JPEG:
00455 case TIFF_NEWJPEG:
00456 av_log(s->avctx, AV_LOG_ERROR, "JPEG compression is not supported\n");
00457 return -1;
00458 default:
00459 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", s->compr);
00460 return -1;
00461 }
00462 break;
00463 case TIFF_ROWSPERSTRIP:
00464 if (type == TIFF_LONG && value == UINT_MAX)
00465 value = s->avctx->height;
00466 if(value < 1){
00467 av_log(s->avctx, AV_LOG_ERROR, "Incorrect value of rows per strip\n");
00468 return -1;
00469 }
00470 s->rps = value;
00471 break;
00472 case TIFF_STRIP_OFFS:
00473 if(count == 1){
00474 s->stripdata = NULL;
00475 s->stripoff = value;
00476 }else
00477 s->stripdata = start + off;
00478 s->strips = count;
00479 if(s->strips == 1) s->rps = s->height;
00480 s->sot = type;
00481 if(s->stripdata > end_buf){
00482 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
00483 return -1;
00484 }
00485 break;
00486 case TIFF_STRIP_SIZE:
00487 if(count == 1){
00488 s->stripsizes = NULL;
00489 s->stripsize = value;
00490 s->strips = 1;
00491 }else{
00492 s->stripsizes = start + off;
00493 }
00494 s->strips = count;
00495 s->sstype = type;
00496 if(s->stripsizes > end_buf){
00497 av_log(s->avctx, AV_LOG_ERROR, "Tag referencing position outside the image\n");
00498 return -1;
00499 }
00500 break;
00501 case TIFF_TILE_BYTE_COUNTS:
00502 case TIFF_TILE_LENGTH:
00503 case TIFF_TILE_OFFSETS:
00504 case TIFF_TILE_WIDTH:
00505 av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");
00506 return AVERROR_PATCHWELCOME;
00507 break;
00508 case TIFF_PREDICTOR:
00509 s->predictor = value;
00510 break;
00511 case TIFF_INVERT:
00512 switch(value){
00513 case 0:
00514 s->invert = 1;
00515 break;
00516 case 1:
00517 s->invert = 0;
00518 break;
00519 case 2:
00520 case 3:
00521 break;
00522 default:
00523 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", value);
00524 return -1;
00525 }
00526 break;
00527 case TIFF_FILL_ORDER:
00528 if(value < 1 || value > 2){
00529 av_log(s->avctx, AV_LOG_ERROR, "Unknown FillOrder value %d, trying default one\n", value);
00530 value = 1;
00531 }
00532 s->fill_order = value - 1;
00533 break;
00534 case TIFF_PAL:
00535 pal = (uint32_t *) s->palette;
00536 off = type_sizes[type];
00537 if (count / 3 > 256 || end_buf - buf < count / 3 * off * 3)
00538 return -1;
00539 rp = buf;
00540 gp = buf + count / 3 * off;
00541 bp = buf + count / 3 * off * 2;
00542 off = (type_sizes[type] - 1) << 3;
00543 for(i = 0; i < count / 3; i++){
00544 j = 0xff << 24;
00545 j |= (tget(&rp, type, s->le) >> off) << 16;
00546 j |= (tget(&gp, type, s->le) >> off) << 8;
00547 j |= tget(&bp, type, s->le) >> off;
00548 pal[i] = j;
00549 }
00550 s->palette_is_set = 1;
00551 break;
00552 case TIFF_PLANAR:
00553 if(value == 2){
00554 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
00555 return -1;
00556 }
00557 break;
00558 case TIFF_T4OPTIONS:
00559 if(s->compr == TIFF_G3)
00560 s->fax_opts = value;
00561 break;
00562 case TIFF_T6OPTIONS:
00563 if(s->compr == TIFF_G4)
00564 s->fax_opts = value;
00565 break;
00566 default:
00567 av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n", tag, tag);
00568 }
00569 return 0;
00570 }
00571
00572 static int decode_frame(AVCodecContext *avctx,
00573 void *data, int *data_size,
00574 AVPacket *avpkt)
00575 {
00576 const uint8_t *buf = avpkt->data;
00577 int buf_size = avpkt->size;
00578 TiffContext * const s = avctx->priv_data;
00579 AVFrame *picture = data;
00580 AVFrame * const p= (AVFrame*)&s->picture;
00581 const uint8_t *orig_buf = buf, *end_buf = buf + buf_size;
00582 unsigned off;
00583 int id, le, ret;
00584 int i, j, entries;
00585 int stride;
00586 unsigned soff, ssize;
00587 uint8_t *dst;
00588
00589
00590 if (end_buf - buf < 8)
00591 return AVERROR_INVALIDDATA;
00592 id = AV_RL16(buf); buf += 2;
00593 if(id == 0x4949) le = 1;
00594 else if(id == 0x4D4D) le = 0;
00595 else{
00596 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
00597 return -1;
00598 }
00599 s->le = le;
00600 s->invert = 0;
00601 s->compr = TIFF_RAW;
00602 s->fill_order = 0;
00603
00604
00605 if(tget_short(&buf, le) != 42){
00606 av_log(avctx, AV_LOG_ERROR, "The answer to life, universe and everything is not correct!\n");
00607 return -1;
00608 }
00609
00610 s->stripsizes = s->stripdata = NULL;
00611
00612 off = tget_long(&buf, le);
00613 if (off >= UINT_MAX - 14 || end_buf - orig_buf < off + 14) {
00614 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
00615 return AVERROR_INVALIDDATA;
00616 }
00617 buf = orig_buf + off;
00618 entries = tget_short(&buf, le);
00619 for(i = 0; i < entries; i++){
00620 if(tiff_decode_tag(s, orig_buf, buf, end_buf) < 0)
00621 return -1;
00622 buf += 12;
00623 }
00624 if(!s->stripdata && !s->stripoff){
00625 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
00626 return -1;
00627 }
00628
00629 if ((ret = init_image(s)) < 0)
00630 return ret;
00631
00632 if(s->strips == 1 && !s->stripsize){
00633 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
00634 s->stripsize = buf_size - s->stripoff;
00635 }
00636 stride = p->linesize[0];
00637 dst = p->data[0];
00638 for(i = 0; i < s->height; i += s->rps){
00639 if(s->stripsizes) {
00640 if (s->stripsizes >= end_buf)
00641 return AVERROR_INVALIDDATA;
00642 ssize = tget(&s->stripsizes, s->sstype, s->le);
00643 } else
00644 ssize = s->stripsize;
00645
00646 if(s->stripdata){
00647 if (s->stripdata >= end_buf)
00648 return AVERROR_INVALIDDATA;
00649 soff = tget(&s->stripdata, s->sot, s->le);
00650 }else
00651 soff = s->stripoff;
00652
00653 if (soff > buf_size || ssize > buf_size - soff) {
00654 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
00655 return -1;
00656 }
00657 if(tiff_unpack_strip(s, dst, stride, orig_buf + soff, ssize, FFMIN(s->rps, s->height - i)) < 0)
00658 break;
00659 dst += s->rps * stride;
00660 }
00661 if(s->predictor == 2){
00662 dst = p->data[0];
00663 soff = s->bpp >> 3;
00664 ssize = s->width * soff;
00665 if (s->avctx->pix_fmt == PIX_FMT_RGB48LE ||
00666 s->avctx->pix_fmt == PIX_FMT_RGBA64LE) {
00667 for (i = 0; i < s->height; i++) {
00668 for (j = soff; j < ssize; j += 2)
00669 AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
00670 dst += stride;
00671 }
00672 } else if (s->avctx->pix_fmt == PIX_FMT_RGB48BE ||
00673 s->avctx->pix_fmt == PIX_FMT_RGBA64BE) {
00674 for (i = 0; i < s->height; i++) {
00675 for (j = soff; j < ssize; j += 2)
00676 AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
00677 dst += stride;
00678 }
00679 } else {
00680 for(i = 0; i < s->height; i++) {
00681 for(j = soff; j < ssize; j++)
00682 dst[j] += dst[j - soff];
00683 dst += stride;
00684 }
00685 }
00686 }
00687
00688 if(s->invert){
00689 dst = s->picture.data[0];
00690 for(i = 0; i < s->height; i++){
00691 for(j = 0; j < s->picture.linesize[0]; j++)
00692 dst[j] = (s->avctx->pix_fmt == PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
00693 dst += s->picture.linesize[0];
00694 }
00695 }
00696 *picture= *(AVFrame*)&s->picture;
00697 *data_size = sizeof(AVPicture);
00698
00699 return buf_size;
00700 }
00701
00702 static av_cold int tiff_init(AVCodecContext *avctx){
00703 TiffContext *s = avctx->priv_data;
00704
00705 s->width = 0;
00706 s->height = 0;
00707 s->avctx = avctx;
00708 avcodec_get_frame_defaults((AVFrame*)&s->picture);
00709 avctx->coded_frame= (AVFrame*)&s->picture;
00710 ff_lzw_decode_open(&s->lzw);
00711 ff_ccitt_unpack_init();
00712
00713 return 0;
00714 }
00715
00716 static av_cold int tiff_end(AVCodecContext *avctx)
00717 {
00718 TiffContext * const s = avctx->priv_data;
00719
00720 ff_lzw_decode_close(&s->lzw);
00721 if(s->picture.data[0])
00722 avctx->release_buffer(avctx, &s->picture);
00723 return 0;
00724 }
00725
00726 AVCodec ff_tiff_decoder = {
00727 .name = "tiff",
00728 .type = AVMEDIA_TYPE_VIDEO,
00729 .id = CODEC_ID_TIFF,
00730 .priv_data_size = sizeof(TiffContext),
00731 .init = tiff_init,
00732 .close = tiff_end,
00733 .decode = decode_frame,
00734 .capabilities = CODEC_CAP_DR1,
00735 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
00736 };