| /* |
| * JPEG2000 image decoder |
| * Copyright (c) 2007 Kamil Nowosad |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * 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 |
| */ |
| |
| /** |
| * JPEG2000 image decoder |
| * @file |
| * @author Kamil Nowosad |
| */ |
| |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "j2k.h" |
| #include "libavutil/common.h" |
| |
| #define JP2_SIG_TYPE 0x6A502020 |
| #define JP2_SIG_VALUE 0x0D0A870A |
| #define JP2_CODESTREAM 0x6A703263 |
| |
| #define HAD_COC 0x01 |
| #define HAD_QCC 0x02 |
| |
| typedef struct { |
| J2kComponent *comp; |
| uint8_t properties[4]; |
| J2kCodingStyle codsty[4]; |
| J2kQuantStyle qntsty[4]; |
| } J2kTile; |
| |
| typedef struct { |
| AVCodecContext *avctx; |
| AVFrame picture; |
| |
| int width, height; ///< image width and height |
| int image_offset_x, image_offset_y; |
| int tile_offset_x, tile_offset_y; |
| uint8_t cbps[4]; ///< bits per sample in particular components |
| uint8_t sgnd[4]; ///< if a component is signed |
| uint8_t properties[4]; |
| int cdx[4], cdy[4]; |
| int precision; |
| int ncomponents; |
| int tile_width, tile_height; ///< tile size |
| int numXtiles, numYtiles; |
| int maxtilelen; |
| |
| J2kCodingStyle codsty[4]; |
| J2kQuantStyle qntsty[4]; |
| |
| const uint8_t *buf_start; |
| const uint8_t *buf; |
| const uint8_t *buf_end; |
| int bit_index; |
| |
| int16_t curtileno; |
| |
| J2kTile *tile; |
| } J2kDecoderContext; |
| |
| static int get_bits(J2kDecoderContext *s, int n) |
| { |
| int res = 0; |
| if (s->buf_end - s->buf < ((n - s->bit_index) >> 8)) |
| return AVERROR(EINVAL); |
| while (--n >= 0){ |
| res <<= 1; |
| if (s->bit_index == 0){ |
| s->bit_index = 7 + (*s->buf != 0xff); |
| s->buf++; |
| } |
| s->bit_index--; |
| res |= (*s->buf >> s->bit_index) & 1; |
| } |
| return res; |
| } |
| |
| static void j2k_flush(J2kDecoderContext *s) |
| { |
| if (*s->buf == 0xff) |
| s->buf++; |
| s->bit_index = 8; |
| s->buf++; |
| } |
| #if 0 |
| void printcomp(J2kComponent *comp) |
| { |
| int i; |
| for (i = 0; i < comp->y1 - comp->y0; i++) |
| ff_j2k_printv(comp->data + i * (comp->x1 - comp->x0), comp->x1 - comp->x0); |
| } |
| |
| static void nspaces(FILE *fd, int n) |
| { |
| while(n--) putc(' ', fd); |
| } |
| |
| static void dump(J2kDecoderContext *s, FILE *fd) |
| { |
| int tileno, compno, reslevelno, bandno, precno; |
| fprintf(fd, "XSiz = %d, YSiz = %d, tile_width = %d, tile_height = %d\n" |
| "numXtiles = %d, numYtiles = %d, ncomponents = %d\n" |
| "tiles:\n", |
| s->width, s->height, s->tile_width, s->tile_height, |
| s->numXtiles, s->numYtiles, s->ncomponents); |
| for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){ |
| J2kTile *tile = s->tile + tileno; |
| nspaces(fd, 2); |
| fprintf(fd, "tile %d:\n", tileno); |
| for(compno = 0; compno < s->ncomponents; compno++){ |
| J2kComponent *comp = tile->comp + compno; |
| nspaces(fd, 4); |
| fprintf(fd, "component %d:\n", compno); |
| nspaces(fd, 4); |
| fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d\n", |
| comp->x0, comp->x1, comp->y0, comp->y1); |
| for(reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){ |
| J2kResLevel *reslevel = comp->reslevel + reslevelno; |
| nspaces(fd, 6); |
| fprintf(fd, "reslevel %d:\n", reslevelno); |
| nspaces(fd, 6); |
| fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d, nbands = %d\n", |
| reslevel->x0, reslevel->x1, reslevel->y0, |
| reslevel->y1, reslevel->nbands); |
| for(bandno = 0; bandno < reslevel->nbands; bandno++){ |
| J2kBand *band = reslevel->band + bandno; |
| nspaces(fd, 8); |
| fprintf(fd, "band %d:\n", bandno); |
| nspaces(fd, 8); |
| fprintf(fd, "x0 = %d, x1 = %d, y0 = %d, y1 = %d," |
| "codeblock_width = %d, codeblock_height = %d cblknx = %d cblkny = %d\n", |
| band->x0, band->x1, |
| band->y0, band->y1, |
| band->codeblock_width, band->codeblock_height, |
| band->cblknx, band->cblkny); |
| for (precno = 0; precno < reslevel->num_precincts_x * reslevel->num_precincts_y; precno++){ |
| J2kPrec *prec = band->prec + precno; |
| nspaces(fd, 10); |
| fprintf(fd, "prec %d:\n", precno); |
| nspaces(fd, 10); |
| fprintf(fd, "xi0 = %d, xi1 = %d, yi0 = %d, yi1 = %d\n", |
| prec->xi0, prec->xi1, prec->yi0, prec->yi1); |
| } |
| } |
| } |
| } |
| } |
| } |
| #endif |
| |
| /** decode the value stored in node */ |
| static int tag_tree_decode(J2kDecoderContext *s, J2kTgtNode *node, int threshold) |
| { |
| J2kTgtNode *stack[30]; |
| int sp = -1, curval = 0; |
| |
| while(node && !node->vis){ |
| stack[++sp] = node; |
| node = node->parent; |
| } |
| |
| if (node) |
| curval = node->val; |
| else |
| curval = stack[sp]->val; |
| |
| while(curval < threshold && sp >= 0){ |
| if (curval < stack[sp]->val) |
| curval = stack[sp]->val; |
| while (curval < threshold){ |
| int ret; |
| if ((ret = get_bits(s, 1)) > 0){ |
| stack[sp]->vis++; |
| break; |
| } else if (!ret) |
| curval++; |
| else |
| return ret; |
| } |
| stack[sp]->val = curval; |
| sp--; |
| } |
| return curval; |
| } |
| |
| /* marker segments */ |
| /** get sizes and offsets of image, tiles; number of components */ |
| static int get_siz(J2kDecoderContext *s) |
| { |
| int i, ret; |
| |
| if (s->buf_end - s->buf < 36) |
| return AVERROR(EINVAL); |
| |
| bytestream_get_be16(&s->buf); // Rsiz (skipped) |
| s->width = bytestream_get_be32(&s->buf); // width |
| s->height = bytestream_get_be32(&s->buf); // height |
| s->image_offset_x = bytestream_get_be32(&s->buf); // X0Siz |
| s->image_offset_y = bytestream_get_be32(&s->buf); // Y0Siz |
| |
| s->tile_width = bytestream_get_be32(&s->buf); // XTSiz |
| s->tile_height = bytestream_get_be32(&s->buf); // YTSiz |
| s->tile_offset_x = bytestream_get_be32(&s->buf); // XT0Siz |
| s->tile_offset_y = bytestream_get_be32(&s->buf); // YT0Siz |
| s->ncomponents = bytestream_get_be16(&s->buf); // CSiz |
| |
| if(s->tile_width<=0 || s->tile_height<=0) |
| return AVERROR(EINVAL); |
| |
| if (s->buf_end - s->buf < 2 * s->ncomponents) |
| return AVERROR(EINVAL); |
| |
| for (i = 0; i < s->ncomponents; i++){ // Ssiz_i XRsiz_i, YRsiz_i |
| uint8_t x = bytestream_get_byte(&s->buf); |
| s->cbps[i] = (x & 0x7f) + 1; |
| s->precision = FFMAX(s->cbps[i], s->precision); |
| s->sgnd[i] = !!(x & 0x80); |
| s->cdx[i] = bytestream_get_byte(&s->buf); |
| s->cdy[i] = bytestream_get_byte(&s->buf); |
| } |
| |
| s->numXtiles = ff_j2k_ceildiv(s->width - s->tile_offset_x, s->tile_width); |
| s->numYtiles = ff_j2k_ceildiv(s->height - s->tile_offset_y, s->tile_height); |
| |
| if(s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(J2kTile)) |
| return AVERROR(EINVAL); |
| |
| s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(J2kTile)); |
| if (!s->tile) |
| return AVERROR(ENOMEM); |
| |
| for (i = 0; i < s->numXtiles * s->numYtiles; i++){ |
| J2kTile *tile = s->tile + i; |
| |
| tile->comp = av_mallocz(s->ncomponents * sizeof(J2kComponent)); |
| if (!tile->comp) |
| return AVERROR(ENOMEM); |
| } |
| |
| s->avctx->width = s->width - s->image_offset_x; |
| s->avctx->height = s->height - s->image_offset_y; |
| |
| switch(s->ncomponents){ |
| case 1: if (s->precision > 8) { |
| s->avctx->pix_fmt = PIX_FMT_GRAY16; |
| } else s->avctx->pix_fmt = PIX_FMT_GRAY8; |
| break; |
| case 3: if (s->precision > 8) { |
| s->avctx->pix_fmt = PIX_FMT_RGB48; |
| } else s->avctx->pix_fmt = PIX_FMT_RGB24; |
| break; |
| case 4: s->avctx->pix_fmt = PIX_FMT_BGRA; break; |
| } |
| |
| if (s->picture.data[0]) |
| s->avctx->release_buffer(s->avctx, &s->picture); |
| |
| if ((ret = s->avctx->get_buffer(s->avctx, &s->picture)) < 0) |
| return ret; |
| |
| s->picture.pict_type = AV_PICTURE_TYPE_I; |
| s->picture.key_frame = 1; |
| |
| return 0; |
| } |
| |
| /** get common part for COD and COC segments */ |
| static int get_cox(J2kDecoderContext *s, J2kCodingStyle *c) |
| { |
| if (s->buf_end - s->buf < 5) |
| return AVERROR(EINVAL); |
| c->nreslevels = bytestream_get_byte(&s->buf) + 1; // num of resolution levels - 1 |
| c->log2_cblk_width = bytestream_get_byte(&s->buf) + 2; // cblk width |
| c->log2_cblk_height = bytestream_get_byte(&s->buf) + 2; // cblk height |
| |
| c->cblk_style = bytestream_get_byte(&s->buf); |
| if (c->cblk_style != 0){ // cblk style |
| av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style); |
| } |
| c->transform = bytestream_get_byte(&s->buf); // transformation |
| if (c->csty & J2K_CSTY_PREC) { |
| int i; |
| for (i = 0; i < c->nreslevels; i++) |
| bytestream_get_byte(&s->buf); |
| } |
| return 0; |
| } |
| |
| /** get coding parameters for a particular tile or whole image*/ |
| static int get_cod(J2kDecoderContext *s, J2kCodingStyle *c, uint8_t *properties) |
| { |
| J2kCodingStyle tmp; |
| int compno; |
| |
| if (s->buf_end - s->buf < 5) |
| return AVERROR(EINVAL); |
| |
| tmp.log2_prec_width = |
| tmp.log2_prec_height = 15; |
| |
| tmp.csty = bytestream_get_byte(&s->buf); |
| |
| if (bytestream_get_byte(&s->buf)){ // progression level |
| av_log(s->avctx, AV_LOG_ERROR, "only LRCP progression supported\n"); |
| return -1; |
| } |
| |
| tmp.nlayers = bytestream_get_be16(&s->buf); |
| tmp.mct = bytestream_get_byte(&s->buf); // multiple component transformation |
| |
| get_cox(s, &tmp); |
| for (compno = 0; compno < s->ncomponents; compno++){ |
| if (!(properties[compno] & HAD_COC)) |
| memcpy(c + compno, &tmp, sizeof(J2kCodingStyle)); |
| } |
| return 0; |
| } |
| |
| /** get coding parameters for a component in the whole image on a particular tile */ |
| static int get_coc(J2kDecoderContext *s, J2kCodingStyle *c, uint8_t *properties) |
| { |
| int compno; |
| |
| if (s->buf_end - s->buf < 2) |
| return AVERROR(EINVAL); |
| |
| compno = bytestream_get_byte(&s->buf); |
| |
| c += compno; |
| c->csty = bytestream_get_byte(&s->buf); |
| get_cox(s, c); |
| |
| properties[compno] |= HAD_COC; |
| return 0; |
| } |
| |
| /** get common part for QCD and QCC segments */ |
| static int get_qcx(J2kDecoderContext *s, int n, J2kQuantStyle *q) |
| { |
| int i, x; |
| |
| if (s->buf_end - s->buf < 1) |
| return AVERROR(EINVAL); |
| |
| x = bytestream_get_byte(&s->buf); // Sqcd |
| |
| q->nguardbits = x >> 5; |
| q->quantsty = x & 0x1f; |
| |
| if (q->quantsty == J2K_QSTY_NONE){ |
| n -= 3; |
| if (s->buf_end - s->buf < n || 32*3 < n) |
| return AVERROR(EINVAL); |
| for (i = 0; i < n; i++) |
| q->expn[i] = bytestream_get_byte(&s->buf) >> 3; |
| } else if (q->quantsty == J2K_QSTY_SI){ |
| if (s->buf_end - s->buf < 2) |
| return AVERROR(EINVAL); |
| x = bytestream_get_be16(&s->buf); |
| q->expn[0] = x >> 11; |
| q->mant[0] = x & 0x7ff; |
| for (i = 1; i < 32 * 3; i++){ |
| int curexpn = FFMAX(0, q->expn[0] - (i-1)/3); |
| q->expn[i] = curexpn; |
| q->mant[i] = q->mant[0]; |
| } |
| } else{ |
| n = (n - 3) >> 1; |
| if (s->buf_end - s->buf < n || 32*3 < n) |
| return AVERROR(EINVAL); |
| for (i = 0; i < n; i++){ |
| x = bytestream_get_be16(&s->buf); |
| q->expn[i] = x >> 11; |
| q->mant[i] = x & 0x7ff; |
| } |
| } |
| return 0; |
| } |
| |
| /** get quantization parameters for a particular tile or a whole image */ |
| static int get_qcd(J2kDecoderContext *s, int n, J2kQuantStyle *q, uint8_t *properties) |
| { |
| J2kQuantStyle tmp; |
| int compno; |
| |
| if (get_qcx(s, n, &tmp)) |
| return -1; |
| for (compno = 0; compno < s->ncomponents; compno++) |
| if (!(properties[compno] & HAD_QCC)) |
| memcpy(q + compno, &tmp, sizeof(J2kQuantStyle)); |
| return 0; |
| } |
| |
| /** get quantization parameters for a component in the whole image on in a particular tile */ |
| static int get_qcc(J2kDecoderContext *s, int n, J2kQuantStyle *q, uint8_t *properties) |
| { |
| int compno; |
| |
| if (s->buf_end - s->buf < 1) |
| return AVERROR(EINVAL); |
| |
| compno = bytestream_get_byte(&s->buf); |
| properties[compno] |= HAD_QCC; |
| return get_qcx(s, n-1, q+compno); |
| } |
| |
| /** get start of tile segment */ |
| static uint8_t get_sot(J2kDecoderContext *s) |
| { |
| if (s->buf_end - s->buf < 4) |
| return AVERROR(EINVAL); |
| |
| s->curtileno = bytestream_get_be16(&s->buf); ///< Isot |
| if((unsigned)s->curtileno >= s->numXtiles * s->numYtiles){ |
| s->curtileno=0; |
| return AVERROR(EINVAL); |
| } |
| |
| s->buf += 4; ///< Psot (ignored) |
| |
| if (!bytestream_get_byte(&s->buf)){ ///< TPsot |
| J2kTile *tile = s->tile + s->curtileno; |
| |
| /* copy defaults */ |
| memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(J2kCodingStyle)); |
| memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(J2kQuantStyle)); |
| } |
| bytestream_get_byte(&s->buf); ///< TNsot |
| |
| return 0; |
| } |
| |
| static int init_tile(J2kDecoderContext *s, int tileno) |
| { |
| int compno, |
| tilex = tileno % s->numXtiles, |
| tiley = tileno / s->numXtiles; |
| J2kTile *tile = s->tile + tileno; |
| |
| if (!tile->comp) |
| return AVERROR(ENOMEM); |
| for (compno = 0; compno < s->ncomponents; compno++){ |
| J2kComponent *comp = tile->comp + compno; |
| J2kCodingStyle *codsty = tile->codsty + compno; |
| J2kQuantStyle *qntsty = tile->qntsty + compno; |
| int ret; // global bandno |
| |
| comp->coord[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x); |
| comp->coord[0][1] = FFMIN((tilex+1)*s->tile_width + s->tile_offset_x, s->width); |
| comp->coord[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y); |
| comp->coord[1][1] = FFMIN((tiley+1)*s->tile_height + s->tile_offset_y, s->height); |
| |
| if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno], s->cdx[compno], s->cdy[compno])) |
| return ret; |
| } |
| return 0; |
| } |
| |
| /** read the number of coding passes */ |
| static int getnpasses(J2kDecoderContext *s) |
| { |
| int num; |
| if (!get_bits(s, 1)) |
| return 1; |
| if (!get_bits(s, 1)) |
| return 2; |
| if ((num = get_bits(s, 2)) != 3) |
| return num < 0 ? num : 3 + num; |
| if ((num = get_bits(s, 5)) != 31) |
| return num < 0 ? num : 6 + num; |
| num = get_bits(s, 7); |
| return num < 0 ? num : 37 + num; |
| } |
| |
| static int getlblockinc(J2kDecoderContext *s) |
| { |
| int res = 0, ret; |
| while (ret = get_bits(s, 1)){ |
| if (ret < 0) |
| return ret; |
| res++; |
| } |
| return res; |
| } |
| |
| static int decode_packet(J2kDecoderContext *s, J2kCodingStyle *codsty, J2kResLevel *rlevel, int precno, |
| int layno, uint8_t *expn, int numgbits) |
| { |
| int bandno, cblkny, cblknx, cblkno, ret; |
| |
| if (!(ret = get_bits(s, 1))){ |
| j2k_flush(s); |
| return 0; |
| } else if (ret < 0) |
| return ret; |
| |
| for (bandno = 0; bandno < rlevel->nbands; bandno++){ |
| J2kBand *band = rlevel->band + bandno; |
| J2kPrec *prec = band->prec + precno; |
| int pos = 0; |
| |
| if (band->coord[0][0] == band->coord[0][1] |
| || band->coord[1][0] == band->coord[1][1]) |
| continue; |
| |
| for (cblkny = prec->yi0; cblkny < prec->yi1; cblkny++) |
| for(cblknx = prec->xi0, cblkno = cblkny * band->cblknx + cblknx; cblknx < prec->xi1; cblknx++, cblkno++, pos++){ |
| J2kCblk *cblk = band->cblk + cblkno; |
| int incl, newpasses, llen; |
| |
| if (cblk->npasses) |
| incl = get_bits(s, 1); |
| else |
| incl = tag_tree_decode(s, prec->cblkincl + pos, layno+1) == layno; |
| if (!incl) |
| continue; |
| else if (incl < 0) |
| return incl; |
| |
| if (!cblk->npasses) |
| cblk->nonzerobits = expn[bandno] + numgbits - 1 - tag_tree_decode(s, prec->zerobits + pos, 100); |
| if ((newpasses = getnpasses(s)) < 0) |
| return newpasses; |
| if ((llen = getlblockinc(s)) < 0) |
| return llen; |
| cblk->lblock += llen; |
| if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0) |
| return ret; |
| cblk->lengthinc = ret; |
| cblk->npasses += newpasses; |
| } |
| } |
| j2k_flush(s); |
| |
| if (codsty->csty & J2K_CSTY_EPH) { |
| if (AV_RB16(s->buf) == J2K_EPH) { |
| s->buf += 2; |
| } else { |
| av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n"); |
| } |
| } |
| |
| for (bandno = 0; bandno < rlevel->nbands; bandno++){ |
| J2kBand *band = rlevel->band + bandno; |
| int yi, cblknw = band->prec[precno].xi1 - band->prec[precno].xi0; |
| for (yi = band->prec[precno].yi0; yi < band->prec[precno].yi1; yi++){ |
| int xi; |
| for (xi = band->prec[precno].xi0; xi < band->prec[precno].xi1; xi++){ |
| J2kCblk *cblk = band->cblk + yi * cblknw + xi; |
| if (s->buf_end - s->buf < cblk->lengthinc) |
| return AVERROR(EINVAL); |
| bytestream_get_buffer(&s->buf, cblk->data, cblk->lengthinc); |
| cblk->length += cblk->lengthinc; |
| cblk->lengthinc = 0; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static int decode_packets(J2kDecoderContext *s, J2kTile *tile) |
| { |
| int layno, reslevelno, compno, precno, ok_reslevel; |
| s->bit_index = 8; |
| for (layno = 0; layno < tile->codsty[0].nlayers; layno++){ |
| ok_reslevel = 1; |
| for (reslevelno = 0; ok_reslevel; reslevelno++){ |
| ok_reslevel = 0; |
| for (compno = 0; compno < s->ncomponents; compno++){ |
| J2kCodingStyle *codsty = tile->codsty + compno; |
| J2kQuantStyle *qntsty = tile->qntsty + compno; |
| if (reslevelno < codsty->nreslevels){ |
| J2kResLevel *rlevel = tile->comp[compno].reslevel + reslevelno; |
| ok_reslevel = 1; |
| for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++){ |
| if (decode_packet(s, codsty, rlevel, precno, layno, qntsty->expn + |
| (reslevelno ? 3*(reslevelno-1)+1 : 0), qntsty->nguardbits)) |
| return -1; |
| } |
| } |
| } |
| } |
| } |
| return 0; |
| } |
| |
| /* TIER-1 routines */ |
| static void decode_sigpass(J2kT1Context *t1, int width, int height, int bpno, int bandno, int bpass_csty_symbol, |
| int vert_causal_ctx_csty_symbol) |
| { |
| int mask = 3 << (bpno - 1), y0, x, y; |
| |
| for (y0 = 0; y0 < height; y0 += 4) |
| for (x = 0; x < width; x++) |
| for (y = y0; y < height && y < y0+4; y++){ |
| if ((t1->flags[y+1][x+1] & J2K_T1_SIG_NB) |
| && !(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS))){ |
| int vert_causal_ctx_csty_loc_symbol = vert_causal_ctx_csty_symbol && (x == 3 && y == 3); |
| if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_j2k_getnbctxno(t1->flags[y+1][x+1], bandno, |
| vert_causal_ctx_csty_loc_symbol))){ |
| int xorbit, ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit); |
| if (bpass_csty_symbol) |
| t1->data[y][x] = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? -mask : mask; |
| else |
| t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ? |
| -mask : mask; |
| |
| ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0); |
| } |
| t1->flags[y+1][x+1] |= J2K_T1_VIS; |
| } |
| } |
| } |
| |
| static void decode_refpass(J2kT1Context *t1, int width, int height, int bpno) |
| { |
| int phalf, nhalf; |
| int y0, x, y; |
| |
| phalf = 1 << (bpno - 1); |
| nhalf = -phalf; |
| |
| for (y0 = 0; y0 < height; y0 += 4) |
| for (x = 0; x < width; x++) |
| for (y = y0; y < height && y < y0+4; y++){ |
| if ((t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS)) == J2K_T1_SIG){ |
| int ctxno = ff_j2k_getrefctxno(t1->flags[y+1][x+1]); |
| int r = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? phalf : nhalf; |
| t1->data[y][x] += t1->data[y][x] < 0 ? -r : r; |
| t1->flags[y+1][x+1] |= J2K_T1_REF; |
| } |
| } |
| } |
| |
| static void decode_clnpass(J2kDecoderContext *s, J2kT1Context *t1, int width, int height, |
| int bpno, int bandno, int seg_symbols) |
| { |
| int mask = 3 << (bpno - 1), y0, x, y, runlen, dec; |
| |
| for (y0 = 0; y0 < height; y0 += 4) { |
| for (x = 0; x < width; x++){ |
| if (y0 + 3 < height && !( |
| (t1->flags[y0+1][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) || |
| (t1->flags[y0+2][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) || |
| (t1->flags[y0+3][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)) || |
| (t1->flags[y0+4][x+1] & (J2K_T1_SIG_NB | J2K_T1_VIS | J2K_T1_SIG)))){ |
| if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL)) |
| continue; |
| runlen = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI); |
| runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI); |
| dec = 1; |
| } else{ |
| runlen = 0; |
| dec = 0; |
| } |
| |
| for (y = y0 + runlen; y < y0 + 4 && y < height; y++){ |
| if (!dec){ |
| if (!(t1->flags[y+1][x+1] & (J2K_T1_SIG | J2K_T1_VIS))) |
| dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_j2k_getnbctxno(t1->flags[y+1][x+1], |
| bandno, 0)); |
| } |
| if (dec){ |
| int xorbit, ctxno = ff_j2k_getsgnctxno(t1->flags[y+1][x+1], &xorbit); |
| t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ? -mask : mask; |
| ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0); |
| } |
| dec = 0; |
| t1->flags[y+1][x+1] &= ~J2K_T1_VIS; |
| } |
| } |
| } |
| if (seg_symbols) { |
| int val; |
| val = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI); |
| val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI); |
| val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI); |
| val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI); |
| if (val != 0xa) { |
| av_log(s->avctx, AV_LOG_ERROR,"Segmentation symbol value incorrect\n"); |
| } |
| } |
| } |
| |
| static int decode_cblk(J2kDecoderContext *s, J2kCodingStyle *codsty, J2kT1Context *t1, J2kCblk *cblk, |
| int width, int height, int bandpos) |
| { |
| int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y, clnpass_cnt = 0; |
| int bpass_csty_symbol = J2K_CBLK_BYPASS & codsty->cblk_style; |
| int vert_causal_ctx_csty_symbol = J2K_CBLK_VSC & codsty->cblk_style; |
| |
| for (y = 0; y < height+2; y++) |
| memset(t1->flags[y], 0, (width+2)*sizeof(int)); |
| |
| for (y = 0; y < height; y++) |
| memset(t1->data[y], 0, width*sizeof(int)); |
| |
| cblk->data[cblk->length] = 0xff; |
| cblk->data[cblk->length+1] = 0xff; |
| ff_mqc_initdec(&t1->mqc, cblk->data); |
| |
| while(passno--){ |
| switch(pass_t){ |
| case 0: decode_sigpass(t1, width, height, bpno+1, bandpos, |
| bpass_csty_symbol && (clnpass_cnt >= 4), vert_causal_ctx_csty_symbol); |
| break; |
| case 1: decode_refpass(t1, width, height, bpno+1); |
| if (bpass_csty_symbol && clnpass_cnt >= 4) |
| ff_mqc_initdec(&t1->mqc, cblk->data); |
| break; |
| case 2: decode_clnpass(s, t1, width, height, bpno+1, bandpos, |
| codsty->cblk_style & J2K_CBLK_SEGSYM); |
| clnpass_cnt = clnpass_cnt + 1; |
| if (bpass_csty_symbol && clnpass_cnt >= 4) |
| ff_mqc_initdec(&t1->mqc, cblk->data); |
| break; |
| } |
| |
| pass_t++; |
| if (pass_t == 3){ |
| bpno--; |
| pass_t = 0; |
| } |
| } |
| return 0; |
| } |
| |
| static void mct_decode(J2kDecoderContext *s, J2kTile *tile) |
| { |
| int i, *src[3], i0, i1, i2, csize = 1; |
| |
| for (i = 0; i < 3; i++) |
| src[i] = tile->comp[i].data; |
| |
| for (i = 0; i < 2; i++) |
| csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0]; |
| |
| if (tile->codsty[0].transform == FF_DWT97){ |
| for (i = 0; i < csize; i++){ |
| i0 = *src[0] + (*src[2] * 46802 >> 16); |
| i1 = *src[0] - (*src[1] * 22553 + *src[2] * 46802 >> 16); |
| i2 = *src[0] + (116130 * *src[1] >> 16); |
| *src[0]++ = i0; |
| *src[1]++ = i1; |
| *src[2]++ = i2; |
| } |
| } else{ |
| for (i = 0; i < csize; i++){ |
| i1 = *src[0] - (*src[2] + *src[1] >> 2); |
| i0 = i1 + *src[2]; |
| i2 = i1 + *src[1]; |
| *src[0]++ = i0; |
| *src[1]++ = i1; |
| *src[2]++ = i2; |
| } |
| } |
| } |
| |
| static int decode_tile(J2kDecoderContext *s, J2kTile *tile) |
| { |
| int compno, reslevelno, bandno; |
| int x, y, *src[4]; |
| uint8_t *line; |
| J2kT1Context t1; |
| |
| for (compno = 0; compno < s->ncomponents; compno++){ |
| J2kComponent *comp = tile->comp + compno; |
| J2kCodingStyle *codsty = tile->codsty + compno; |
| |
| for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++){ |
| J2kResLevel *rlevel = comp->reslevel + reslevelno; |
| for (bandno = 0; bandno < rlevel->nbands; bandno++){ |
| J2kBand *band = rlevel->band + bandno; |
| int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos; |
| |
| bandpos = bandno + (reslevelno > 0); |
| |
| yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0]; |
| y0 = yy0; |
| yy1 = FFMIN(ff_j2k_ceildiv(band->coord[1][0] + 1, band->codeblock_height) * band->codeblock_height, |
| band->coord[1][1]) - band->coord[1][0] + yy0; |
| |
| if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1]) |
| continue; |
| |
| for (cblky = 0; cblky < band->cblkny; cblky++){ |
| if (reslevelno == 0 || bandno == 1) |
| xx0 = 0; |
| else |
| xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0]; |
| x0 = xx0; |
| xx1 = FFMIN(ff_j2k_ceildiv(band->coord[0][0] + 1, band->codeblock_width) * band->codeblock_width, |
| band->coord[0][1]) - band->coord[0][0] + xx0; |
| |
| for (cblkx = 0; cblkx < band->cblknx; cblkx++, cblkno++){ |
| int y, x; |
| decode_cblk(s, codsty, &t1, band->cblk + cblkno, xx1 - xx0, yy1 - yy0, bandpos); |
| if (codsty->transform == FF_DWT53){ |
| for (y = yy0; y < yy1; y+=s->cdy[compno]){ |
| int *ptr = t1.data[y-yy0]; |
| for (x = xx0; x < xx1; x+=s->cdx[compno]){ |
| comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = *ptr++ >> 1; |
| } |
| } |
| } else{ |
| for (y = yy0; y < yy1; y+=s->cdy[compno]){ |
| int *ptr = t1.data[y-yy0]; |
| for (x = xx0; x < xx1; x+=s->cdx[compno]){ |
| int tmp = ((int64_t)*ptr++) * ((int64_t)band->stepsize) >> 13, tmp2; |
| tmp2 = FFABS(tmp>>1) + FFABS(tmp&1); |
| comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = tmp < 0 ? -tmp2 : tmp2; |
| } |
| } |
| } |
| xx0 = xx1; |
| xx1 = FFMIN(xx1 + band->codeblock_width, band->coord[0][1] - band->coord[0][0] + x0); |
| } |
| yy0 = yy1; |
| yy1 = FFMIN(yy1 + band->codeblock_height, band->coord[1][1] - band->coord[1][0] + y0); |
| } |
| } |
| } |
| ff_j2k_dwt_decode(&comp->dwt, comp->data); |
| src[compno] = comp->data; |
| } |
| if (tile->codsty[0].mct) |
| mct_decode(s, tile); |
| |
| if (s->avctx->pix_fmt == PIX_FMT_BGRA) // RGBA -> BGRA |
| FFSWAP(int *, src[0], src[2]); |
| |
| if (s->precision <= 8) { |
| for (compno = 0; compno < s->ncomponents; compno++){ |
| y = tile->comp[compno].coord[1][0] - s->image_offset_y; |
| line = s->picture.data[0] + y * s->picture.linesize[0]; |
| for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]){ |
| uint8_t *dst; |
| |
| x = tile->comp[compno].coord[0][0] - s->image_offset_x; |
| dst = line + x * s->ncomponents + compno; |
| |
| for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) { |
| *src[compno] += 1 << (s->cbps[compno]-1); |
| if (*src[compno] < 0) |
| *src[compno] = 0; |
| else if (*src[compno] >= (1 << s->cbps[compno])) |
| *src[compno] = (1 << s->cbps[compno]) - 1; |
| *dst = *src[compno]++; |
| dst += s->ncomponents; |
| } |
| line += s->picture.linesize[0]; |
| } |
| } |
| } else { |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| y = tile->comp[compno].coord[1][0] - s->image_offset_y; |
| line = s->picture.data[0] + y * s->picture.linesize[0]; |
| for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) { |
| uint16_t *dst; |
| x = tile->comp[compno].coord[0][0] - s->image_offset_x; |
| dst = line + (x * s->ncomponents + compno) * 2; |
| for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s-> cdx[compno]) { |
| int32_t val; |
| val = *src[compno]++ << (16 - s->cbps[compno]); |
| val += 1 << 15; |
| val = av_clip(val, 0, (1 << 16) - 1); |
| *dst = val; |
| dst += s->ncomponents; |
| } |
| line += s->picture.linesize[0]; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static void cleanup(J2kDecoderContext *s) |
| { |
| int tileno, compno; |
| for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++){ |
| for (compno = 0; compno < s->ncomponents; compno++){ |
| J2kComponent *comp = s->tile[tileno].comp + compno; |
| J2kCodingStyle *codsty = s->tile[tileno].codsty + compno; |
| |
| ff_j2k_cleanup(comp, codsty); |
| } |
| av_freep(&s->tile[tileno].comp); |
| } |
| av_freep(&s->tile); |
| } |
| |
| static int decode_codestream(J2kDecoderContext *s) |
| { |
| J2kCodingStyle *codsty = s->codsty; |
| J2kQuantStyle *qntsty = s->qntsty; |
| uint8_t *properties = s->properties; |
| |
| for (;;){ |
| int marker, len, ret = 0; |
| const uint8_t *oldbuf; |
| if (s->buf_end - s->buf < 2){ |
| av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n"); |
| break; |
| } |
| |
| marker = bytestream_get_be16(&s->buf); |
| if(s->avctx->debug & FF_DEBUG_STARTCODE) |
| av_log(s->avctx, AV_LOG_DEBUG, "marker 0x%.4X at pos 0x%tx\n", marker, s->buf - s->buf_start - 4); |
| oldbuf = s->buf; |
| |
| if (marker == J2K_SOD){ |
| J2kTile *tile = s->tile + s->curtileno; |
| if (ret = init_tile(s, s->curtileno)) |
| return ret; |
| if (ret = decode_packets(s, tile)) |
| return ret; |
| continue; |
| } |
| if (marker == J2K_EOC) |
| break; |
| |
| if (s->buf_end - s->buf < 2) |
| return AVERROR(EINVAL); |
| len = bytestream_get_be16(&s->buf); |
| switch(marker){ |
| case J2K_SIZ: |
| ret = get_siz(s); break; |
| case J2K_COC: |
| ret = get_coc(s, codsty, properties); break; |
| case J2K_COD: |
| ret = get_cod(s, codsty, properties); break; |
| case J2K_QCC: |
| ret = get_qcc(s, len, qntsty, properties); break; |
| case J2K_QCD: |
| ret = get_qcd(s, len, qntsty, properties); break; |
| case J2K_SOT: |
| if (!(ret = get_sot(s))){ |
| codsty = s->tile[s->curtileno].codsty; |
| qntsty = s->tile[s->curtileno].qntsty; |
| properties = s->tile[s->curtileno].properties; |
| } |
| break; |
| case J2K_COM: |
| // the comment is ignored |
| s->buf += len - 2; break; |
| default: |
| av_log(s->avctx, AV_LOG_ERROR, "unsupported marker 0x%.4X at pos 0x%tx\n", marker, s->buf - s->buf_start - 4); |
| s->buf += len - 2; break; |
| } |
| if (s->buf - oldbuf != len || ret){ |
| av_log(s->avctx, AV_LOG_ERROR, "error during processing marker segment %.4x\n", marker); |
| return ret ? ret : -1; |
| } |
| } |
| return 0; |
| } |
| |
| static int jp2_find_codestream(J2kDecoderContext *s) |
| { |
| uint32_t atom_size; |
| int found_codestream = 0, search_range = 10; |
| |
| // skip jpeg2k signature atom |
| s->buf += 12; |
| |
| while(!found_codestream && search_range && s->buf_end - s->buf >= 8) { |
| atom_size = AV_RB32(s->buf); |
| if(AV_RB32(s->buf + 4) == JP2_CODESTREAM) { |
| found_codestream = 1; |
| s->buf += 8; |
| } else { |
| if (s->buf_end - s->buf < atom_size) |
| return 0; |
| s->buf += atom_size; |
| search_range--; |
| } |
| } |
| |
| if(found_codestream) |
| return 1; |
| return 0; |
| } |
| |
| static int decode_frame(AVCodecContext *avctx, |
| void *data, int *data_size, |
| AVPacket *avpkt) |
| { |
| J2kDecoderContext *s = avctx->priv_data; |
| AVFrame *picture = data; |
| int tileno, ret; |
| |
| s->avctx = avctx; |
| av_log(s->avctx, AV_LOG_DEBUG, "start\n"); |
| |
| // init |
| s->buf = s->buf_start = avpkt->data; |
| s->buf_end = s->buf_start + avpkt->size; |
| s->curtileno = -1; |
| |
| ff_j2k_init_tier1_luts(); |
| |
| if (s->buf_end - s->buf < 2) { |
| ret = AVERROR(EINVAL); |
| goto err_out; |
| } |
| |
| // check if the image is in jp2 format |
| if(s->buf_end - s->buf >= 12 && |
| (AV_RB32(s->buf) == 12) && (AV_RB32(s->buf + 4) == JP2_SIG_TYPE) && |
| (AV_RB32(s->buf + 8) == JP2_SIG_VALUE)) { |
| if(!jp2_find_codestream(s)) { |
| av_log(avctx, AV_LOG_ERROR, "couldn't find jpeg2k codestream atom\n"); |
| ret = -1; |
| goto err_out; |
| } |
| } |
| |
| if (bytestream_get_be16(&s->buf) != J2K_SOC){ |
| av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n"); |
| ret = -1; |
| goto err_out; |
| } |
| if (ret = decode_codestream(s)) |
| goto err_out; |
| |
| for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) |
| if (ret = decode_tile(s, s->tile + tileno)) |
| goto err_out; |
| |
| cleanup(s); |
| av_log(s->avctx, AV_LOG_DEBUG, "end\n"); |
| |
| *data_size = sizeof(AVPicture); |
| *picture = s->picture; |
| |
| return s->buf - s->buf_start; |
| |
| err_out: |
| cleanup(s); |
| return ret; |
| } |
| |
| static av_cold int j2kdec_init(AVCodecContext *avctx) |
| { |
| J2kDecoderContext *s = avctx->priv_data; |
| |
| avcodec_get_frame_defaults((AVFrame*)&s->picture); |
| avctx->coded_frame = (AVFrame*)&s->picture; |
| return 0; |
| } |
| |
| static av_cold int decode_end(AVCodecContext *avctx) |
| { |
| J2kDecoderContext *s = avctx->priv_data; |
| |
| if (s->picture.data[0]) |
| avctx->release_buffer(avctx, &s->picture); |
| |
| return 0; |
| } |
| |
| AVCodec ff_jpeg2000_decoder = { |
| .name = "j2k", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = CODEC_ID_JPEG2000, |
| .priv_data_size = sizeof(J2kDecoderContext), |
| .init = j2kdec_init, |
| .close = decode_end, |
| .decode = decode_frame, |
| .capabilities = CODEC_CAP_EXPERIMENTAL, |
| .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"), |
| .pix_fmts = |
| (const enum PixelFormat[]) {PIX_FMT_GRAY8, PIX_FMT_RGB24, PIX_FMT_NONE} |
| }; |