| /* |
| * JPEG 2000 image decoder |
| * Copyright (c) 2007 Kamil Nowosad |
| * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com> |
| * |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * JPEG 2000 image decoder |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/common.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/pixdesc.h" |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "internal.h" |
| #include "thread.h" |
| #include "jpeg2000.h" |
| |
| #define JP2_SIG_TYPE 0x6A502020 |
| #define JP2_SIG_VALUE 0x0D0A870A |
| #define JP2_CODESTREAM 0x6A703263 |
| #define JP2_HEADER 0x6A703268 |
| |
| #define HAD_COC 0x01 |
| #define HAD_QCC 0x02 |
| |
| typedef struct Jpeg2000TilePart { |
| uint8_t tile_index; // Tile index who refers the tile-part |
| const uint8_t *tp_end; |
| GetByteContext tpg; // bit stream in tile-part |
| } Jpeg2000TilePart; |
| |
| /* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile |
| * one per component, so tile_part elements have a size of 3 */ |
| typedef struct Jpeg2000Tile { |
| Jpeg2000Component *comp; |
| uint8_t properties[4]; |
| Jpeg2000CodingStyle codsty[4]; |
| Jpeg2000QuantStyle qntsty[4]; |
| Jpeg2000TilePart tile_part[4]; |
| uint16_t tp_idx; // Tile-part index |
| } Jpeg2000Tile; |
| |
| typedef struct Jpeg2000DecoderContext { |
| AVClass *class; |
| AVCodecContext *avctx; |
| GetByteContext g; |
| |
| int width, 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 colour_space; |
| uint32_t palette[256]; |
| int8_t pal8; |
| int cdef[4]; |
| int tile_width, tile_height; |
| unsigned numXtiles, numYtiles; |
| int maxtilelen; |
| |
| Jpeg2000CodingStyle codsty[4]; |
| Jpeg2000QuantStyle qntsty[4]; |
| |
| int bit_index; |
| |
| int curtileno; |
| |
| Jpeg2000Tile *tile; |
| |
| /*options parameters*/ |
| int reduction_factor; |
| } Jpeg2000DecoderContext; |
| |
| /* get_bits functions for JPEG2000 packet bitstream |
| * It is a get_bit function with a bit-stuffing routine. If the value of the |
| * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB. |
| * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */ |
| static int get_bits(Jpeg2000DecoderContext *s, int n) |
| { |
| int res = 0; |
| |
| while (--n >= 0) { |
| res <<= 1; |
| if (s->bit_index == 0) { |
| s->bit_index = 7 + (bytestream2_get_byte(&s->g) != 0xFFu); |
| } |
| s->bit_index--; |
| res |= (bytestream2_peek_byte(&s->g) >> s->bit_index) & 1; |
| } |
| return res; |
| } |
| |
| static void jpeg2000_flush(Jpeg2000DecoderContext *s) |
| { |
| if (bytestream2_get_byte(&s->g) == 0xff) |
| bytestream2_skip(&s->g, 1); |
| s->bit_index = 8; |
| } |
| |
| /* decode the value stored in node */ |
| static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node, |
| int threshold) |
| { |
| Jpeg2000TgtNode *stack[30]; |
| int sp = -1, curval = 0; |
| |
| if (!node) |
| return AVERROR_INVALIDDATA; |
| |
| 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; |
| } |
| |
| static int pix_fmt_match(enum AVPixelFormat pix_fmt, int components, |
| int bpc, uint32_t log2_chroma_wh, int pal8) |
| { |
| int match = 1; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
| |
| if (desc->nb_components != components) { |
| return 0; |
| } |
| |
| switch (components) { |
| case 4: |
| match = match && desc->comp[3].depth_minus1 + 1 >= bpc && |
| (log2_chroma_wh >> 14 & 3) == 0 && |
| (log2_chroma_wh >> 12 & 3) == 0; |
| case 3: |
| match = match && desc->comp[2].depth_minus1 + 1 >= bpc && |
| (log2_chroma_wh >> 10 & 3) == desc->log2_chroma_w && |
| (log2_chroma_wh >> 8 & 3) == desc->log2_chroma_h; |
| case 2: |
| match = match && desc->comp[1].depth_minus1 + 1 >= bpc && |
| (log2_chroma_wh >> 6 & 3) == desc->log2_chroma_w && |
| (log2_chroma_wh >> 4 & 3) == desc->log2_chroma_h; |
| |
| case 1: |
| match = match && desc->comp[0].depth_minus1 + 1 >= bpc && |
| (log2_chroma_wh >> 2 & 3) == 0 && |
| (log2_chroma_wh & 3) == 0 && |
| (desc->flags & AV_PIX_FMT_FLAG_PAL) == pal8 * AV_PIX_FMT_FLAG_PAL; |
| } |
| return match; |
| } |
| |
| // pix_fmts with lower bpp have to be listed before |
| // similar pix_fmts with higher bpp. |
| #define RGB_PIXEL_FORMATS AV_PIX_FMT_PAL8,AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64 |
| #define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16 |
| #define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P,AV_PIX_FMT_YUV411P,AV_PIX_FMT_YUVA420P, \ |
| AV_PIX_FMT_YUV420P,AV_PIX_FMT_YUV422P,AV_PIX_FMT_YUVA422P, \ |
| AV_PIX_FMT_YUV440P,AV_PIX_FMT_YUV444P,AV_PIX_FMT_YUVA444P, \ |
| AV_PIX_FMT_YUV420P9,AV_PIX_FMT_YUV422P9,AV_PIX_FMT_YUV444P9, \ |
| AV_PIX_FMT_YUVA420P9,AV_PIX_FMT_YUVA422P9,AV_PIX_FMT_YUVA444P9, \ |
| AV_PIX_FMT_YUV420P10,AV_PIX_FMT_YUV422P10,AV_PIX_FMT_YUV444P10, \ |
| AV_PIX_FMT_YUVA420P10,AV_PIX_FMT_YUVA422P10,AV_PIX_FMT_YUVA444P10, \ |
| AV_PIX_FMT_YUV420P12,AV_PIX_FMT_YUV422P12,AV_PIX_FMT_YUV444P12, \ |
| AV_PIX_FMT_YUV420P14,AV_PIX_FMT_YUV422P14,AV_PIX_FMT_YUV444P14, \ |
| AV_PIX_FMT_YUV420P16,AV_PIX_FMT_YUV422P16,AV_PIX_FMT_YUV444P16, \ |
| AV_PIX_FMT_YUVA420P16,AV_PIX_FMT_YUVA422P16,AV_PIX_FMT_YUVA444P16 |
| #define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12 |
| |
| static const enum AVPixelFormat rgb_pix_fmts[] = {RGB_PIXEL_FORMATS}; |
| static const enum AVPixelFormat gray_pix_fmts[] = {GRAY_PIXEL_FORMATS}; |
| static const enum AVPixelFormat yuv_pix_fmts[] = {YUV_PIXEL_FORMATS}; |
| static const enum AVPixelFormat xyz_pix_fmts[] = {XYZ_PIXEL_FORMATS}; |
| static const enum AVPixelFormat all_pix_fmts[] = {RGB_PIXEL_FORMATS, |
| GRAY_PIXEL_FORMATS, |
| YUV_PIXEL_FORMATS, |
| XYZ_PIXEL_FORMATS}; |
| |
| /* marker segments */ |
| /* get sizes and offsets of image, tiles; number of components */ |
| static int get_siz(Jpeg2000DecoderContext *s) |
| { |
| int i; |
| int ncomponents; |
| uint32_t log2_chroma_wh = 0; |
| const enum AVPixelFormat *possible_fmts = NULL; |
| int possible_fmts_nb = 0; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 36) |
| return AVERROR_INVALIDDATA; |
| |
| s->avctx->profile = bytestream2_get_be16u(&s->g); // Rsiz |
| s->width = bytestream2_get_be32u(&s->g); // Width |
| s->height = bytestream2_get_be32u(&s->g); // Height |
| s->image_offset_x = bytestream2_get_be32u(&s->g); // X0Siz |
| s->image_offset_y = bytestream2_get_be32u(&s->g); // Y0Siz |
| s->tile_width = bytestream2_get_be32u(&s->g); // XTSiz |
| s->tile_height = bytestream2_get_be32u(&s->g); // YTSiz |
| s->tile_offset_x = bytestream2_get_be32u(&s->g); // XT0Siz |
| s->tile_offset_y = bytestream2_get_be32u(&s->g); // YT0Siz |
| ncomponents = bytestream2_get_be16u(&s->g); // CSiz |
| |
| if (s->image_offset_x || s->image_offset_y) { |
| avpriv_request_sample(s->avctx, "Support for image offsets"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (ncomponents <= 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid number of components: %d\n", |
| s->ncomponents); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ncomponents > 4) { |
| avpriv_request_sample(s->avctx, "Support for %d components", |
| s->ncomponents); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| s->ncomponents = ncomponents; |
| |
| if (s->tile_width <= 0 || s->tile_height <= 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid tile dimension %dx%d.\n", |
| s->tile_width, s->tile_height); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (bytestream2_get_bytes_left(&s->g) < 3 * s->ncomponents) |
| return AVERROR_INVALIDDATA; |
| |
| for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i |
| uint8_t x = bytestream2_get_byteu(&s->g); |
| s->cbps[i] = (x & 0x7f) + 1; |
| s->precision = FFMAX(s->cbps[i], s->precision); |
| s->sgnd[i] = !!(x & 0x80); |
| s->cdx[i] = bytestream2_get_byteu(&s->g); |
| s->cdy[i] = bytestream2_get_byteu(&s->g); |
| if ( !s->cdx[i] || s->cdx[i] == 3 || s->cdx[i] > 4 |
| || !s->cdy[i] || s->cdy[i] == 3 || s->cdy[i] > 4) { |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid sample separation %d/%d\n", s->cdx[i], s->cdy[i]); |
| return AVERROR_INVALIDDATA; |
| } |
| log2_chroma_wh |= s->cdy[i] >> 1 << i * 4 | s->cdx[i] >> 1 << i * 4 + 2; |
| } |
| |
| s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width); |
| s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height); |
| |
| if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(*s->tile)) { |
| s->numXtiles = s->numYtiles = 0; |
| return AVERROR(EINVAL); |
| } |
| |
| s->tile = av_mallocz_array(s->numXtiles * s->numYtiles, sizeof(*s->tile)); |
| if (!s->tile) { |
| s->numXtiles = s->numYtiles = 0; |
| return AVERROR(ENOMEM); |
| } |
| |
| for (i = 0; i < s->numXtiles * s->numYtiles; i++) { |
| Jpeg2000Tile *tile = s->tile + i; |
| |
| tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp)); |
| if (!tile->comp) |
| return AVERROR(ENOMEM); |
| } |
| |
| /* compute image size with reduction factor */ |
| s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x, |
| s->reduction_factor); |
| s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y, |
| s->reduction_factor); |
| |
| if (s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_2K || |
| s->avctx->profile == FF_PROFILE_JPEG2000_DCINEMA_4K) { |
| possible_fmts = xyz_pix_fmts; |
| possible_fmts_nb = FF_ARRAY_ELEMS(xyz_pix_fmts); |
| } else { |
| switch (s->colour_space) { |
| case 16: |
| possible_fmts = rgb_pix_fmts; |
| possible_fmts_nb = FF_ARRAY_ELEMS(rgb_pix_fmts); |
| break; |
| case 17: |
| possible_fmts = gray_pix_fmts; |
| possible_fmts_nb = FF_ARRAY_ELEMS(gray_pix_fmts); |
| break; |
| case 18: |
| possible_fmts = yuv_pix_fmts; |
| possible_fmts_nb = FF_ARRAY_ELEMS(yuv_pix_fmts); |
| break; |
| default: |
| possible_fmts = all_pix_fmts; |
| possible_fmts_nb = FF_ARRAY_ELEMS(all_pix_fmts); |
| break; |
| } |
| } |
| for (i = 0; i < possible_fmts_nb; ++i) { |
| if (pix_fmt_match(possible_fmts[i], ncomponents, s->precision, log2_chroma_wh, s->pal8)) { |
| s->avctx->pix_fmt = possible_fmts[i]; |
| break; |
| } |
| } |
| if (i == possible_fmts_nb) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Unknown pix_fmt, profile: %d, colour_space: %d, " |
| "components: %d, precision: %d, " |
| "cdx[1]: %d, cdy[1]: %d, cdx[2]: %d, cdy[2]: %d\n", |
| s->avctx->profile, s->colour_space, ncomponents, s->precision, |
| ncomponents > 2 ? s->cdx[1] : 0, |
| ncomponents > 2 ? s->cdy[1] : 0, |
| ncomponents > 2 ? s->cdx[2] : 0, |
| ncomponents > 2 ? s->cdy[2] : 0); |
| return AVERROR_PATCHWELCOME; |
| } |
| s->avctx->bits_per_raw_sample = s->precision; |
| return 0; |
| } |
| |
| /* get common part for COD and COC segments */ |
| static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c) |
| { |
| uint8_t byte; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 5) |
| return AVERROR_INVALIDDATA; |
| |
| /* nreslevels = number of resolution levels |
| = number of decomposition level +1 */ |
| c->nreslevels = bytestream2_get_byteu(&s->g) + 1; |
| if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) { |
| av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (c->nreslevels <= s->reduction_factor) { |
| /* we are forced to update reduction_factor as its requested value is |
| not compatible with this bitstream, and as we might have used it |
| already in setup earlier we have to fail this frame until |
| reinitialization is implemented */ |
| av_log(s->avctx, AV_LOG_ERROR, "reduction_factor too large for this bitstream, max is %d\n", c->nreslevels - 1); |
| s->reduction_factor = c->nreslevels - 1; |
| return AVERROR(EINVAL); |
| } |
| |
| /* compute number of resolution levels to decode */ |
| c->nreslevels2decode = c->nreslevels - s->reduction_factor; |
| |
| c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width |
| c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height |
| |
| if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 || |
| c->log2_cblk_width + c->log2_cblk_height > 12) { |
| av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (c->log2_cblk_width > 6 || c->log2_cblk_height > 6) { |
| avpriv_request_sample(s->avctx, "cblk size > 64"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| c->cblk_style = bytestream2_get_byteu(&s->g); |
| if (c->cblk_style != 0) { // cblk style |
| av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style); |
| } |
| c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type |
| /* set integer 9/7 DWT in case of BITEXACT flag */ |
| if ((s->avctx->flags & CODEC_FLAG_BITEXACT) && (c->transform == FF_DWT97)) |
| c->transform = FF_DWT97_INT; |
| |
| if (c->csty & JPEG2000_CSTY_PREC) { |
| int i; |
| for (i = 0; i < c->nreslevels; i++) { |
| byte = bytestream2_get_byte(&s->g); |
| c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx |
| c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy |
| } |
| } else { |
| memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths )); |
| memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights)); |
| } |
| return 0; |
| } |
| |
| /* get coding parameters for a particular tile or whole image*/ |
| static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, |
| uint8_t *properties) |
| { |
| Jpeg2000CodingStyle tmp; |
| int compno, ret; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 5) |
| return AVERROR_INVALIDDATA; |
| |
| tmp.csty = bytestream2_get_byteu(&s->g); |
| |
| // get progression order |
| tmp.prog_order = bytestream2_get_byteu(&s->g); |
| |
| tmp.nlayers = bytestream2_get_be16u(&s->g); |
| tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation |
| |
| if (tmp.mct && s->ncomponents < 3) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "MCT %d with too few components (%d)\n", |
| tmp.mct, s->ncomponents); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if ((ret = get_cox(s, &tmp)) < 0) |
| return ret; |
| |
| for (compno = 0; compno < s->ncomponents; compno++) |
| if (!(properties[compno] & HAD_COC)) |
| memcpy(c + compno, &tmp, sizeof(tmp)); |
| return 0; |
| } |
| |
| /* Get coding parameters for a component in the whole image or a |
| * particular tile. */ |
| static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, |
| uint8_t *properties) |
| { |
| int compno, ret; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 2) |
| return AVERROR_INVALIDDATA; |
| |
| compno = bytestream2_get_byteu(&s->g); |
| |
| if (compno >= s->ncomponents) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Invalid compno %d. There are %d components in the image.\n", |
| compno, s->ncomponents); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| c += compno; |
| c->csty = bytestream2_get_byteu(&s->g); |
| |
| if ((ret = get_cox(s, c)) < 0) |
| return ret; |
| |
| properties[compno] |= HAD_COC; |
| return 0; |
| } |
| |
| /* Get common part for QCD and QCC segments. */ |
| static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q) |
| { |
| int i, x; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 1) |
| return AVERROR_INVALIDDATA; |
| |
| x = bytestream2_get_byteu(&s->g); // Sqcd |
| |
| q->nguardbits = x >> 5; |
| q->quantsty = x & 0x1f; |
| |
| if (q->quantsty == JPEG2000_QSTY_NONE) { |
| n -= 3; |
| if (bytestream2_get_bytes_left(&s->g) < n || |
| n > JPEG2000_MAX_DECLEVELS*3) |
| return AVERROR_INVALIDDATA; |
| for (i = 0; i < n; i++) |
| q->expn[i] = bytestream2_get_byteu(&s->g) >> 3; |
| } else if (q->quantsty == JPEG2000_QSTY_SI) { |
| if (bytestream2_get_bytes_left(&s->g) < 2) |
| return AVERROR_INVALIDDATA; |
| x = bytestream2_get_be16u(&s->g); |
| q->expn[0] = x >> 11; |
| q->mant[0] = x & 0x7ff; |
| for (i = 1; i < JPEG2000_MAX_DECLEVELS * 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 (bytestream2_get_bytes_left(&s->g) < 2 * n || |
| n > JPEG2000_MAX_DECLEVELS*3) |
| return AVERROR_INVALIDDATA; |
| for (i = 0; i < n; i++) { |
| x = bytestream2_get_be16u(&s->g); |
| 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(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, |
| uint8_t *properties) |
| { |
| Jpeg2000QuantStyle tmp; |
| int compno, ret; |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| if ((ret = get_qcx(s, n, &tmp)) < 0) |
| return ret; |
| for (compno = 0; compno < s->ncomponents; compno++) |
| if (!(properties[compno] & HAD_QCC)) |
| memcpy(q + compno, &tmp, sizeof(tmp)); |
| return 0; |
| } |
| |
| /* Get quantization parameters for a component in the whole image |
| * on in a particular tile. */ |
| static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, |
| uint8_t *properties) |
| { |
| int compno; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 1) |
| return AVERROR_INVALIDDATA; |
| |
| compno = bytestream2_get_byteu(&s->g); |
| |
| if (compno >= s->ncomponents) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Invalid compno %d. There are %d components in the image.\n", |
| compno, s->ncomponents); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| properties[compno] |= HAD_QCC; |
| return get_qcx(s, n - 1, q + compno); |
| } |
| |
| /* Get start of tile segment. */ |
| static int get_sot(Jpeg2000DecoderContext *s, int n) |
| { |
| Jpeg2000TilePart *tp; |
| uint16_t Isot; |
| uint32_t Psot; |
| uint8_t TPsot; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 8) |
| return AVERROR_INVALIDDATA; |
| |
| s->curtileno = 0; |
| Isot = bytestream2_get_be16u(&s->g); // Isot |
| if (Isot >= s->numXtiles * s->numYtiles) |
| return AVERROR_INVALIDDATA; |
| |
| s->curtileno = Isot; |
| Psot = bytestream2_get_be32u(&s->g); // Psot |
| TPsot = bytestream2_get_byteu(&s->g); // TPsot |
| |
| /* Read TNSot but not used */ |
| bytestream2_get_byteu(&s->g); // TNsot |
| |
| if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) { |
| av_log(s->avctx, AV_LOG_ERROR, "Psot %d too big\n", Psot); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (TPsot >= FF_ARRAY_ELEMS(s->tile[Isot].tile_part)) { |
| avpriv_request_sample(s->avctx, "Support for %d components", TPsot); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| s->tile[Isot].tp_idx = TPsot; |
| tp = s->tile[Isot].tile_part + TPsot; |
| tp->tile_index = Isot; |
| tp->tp_end = s->g.buffer + Psot - n - 2; |
| |
| if (!TPsot) { |
| Jpeg2000Tile *tile = s->tile + s->curtileno; |
| |
| /* copy defaults */ |
| memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle)); |
| memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle)); |
| } |
| |
| return 0; |
| } |
| |
| /* Tile-part lengths: see ISO 15444-1:2002, section A.7.1 |
| * Used to know the number of tile parts and lengths. |
| * There may be multiple TLMs in the header. |
| * TODO: The function is not used for tile-parts management, nor anywhere else. |
| * It can be useful to allocate memory for tile parts, before managing the SOT |
| * markers. Parsing the TLM header is needed to increment the input header |
| * buffer. |
| * This marker is mandatory for DCI. */ |
| static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n) |
| { |
| uint8_t Stlm, ST, SP, tile_tlm, i; |
| bytestream2_get_byte(&s->g); /* Ztlm: skipped */ |
| Stlm = bytestream2_get_byte(&s->g); |
| |
| // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02); |
| ST = (Stlm >> 4) & 0x03; |
| // TODO: Manage case of ST = 0b11 --> raise error |
| SP = (Stlm >> 6) & 0x01; |
| tile_tlm = (n - 4) / ((SP + 1) * 2 + ST); |
| for (i = 0; i < tile_tlm; i++) { |
| switch (ST) { |
| case 0: |
| break; |
| case 1: |
| bytestream2_get_byte(&s->g); |
| break; |
| case 2: |
| bytestream2_get_be16(&s->g); |
| break; |
| case 3: |
| bytestream2_get_be32(&s->g); |
| break; |
| } |
| if (SP == 0) { |
| bytestream2_get_be16(&s->g); |
| } else { |
| bytestream2_get_be32(&s->g); |
| } |
| } |
| return 0; |
| } |
| |
| static int init_tile(Jpeg2000DecoderContext *s, int tileno) |
| { |
| int compno; |
| int tilex = tileno % s->numXtiles; |
| int tiley = tileno / s->numXtiles; |
| Jpeg2000Tile *tile = s->tile + tileno; |
| |
| if (!tile->comp) |
| return AVERROR(ENOMEM); |
| |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| Jpeg2000Component *comp = tile->comp + compno; |
| Jpeg2000CodingStyle *codsty = tile->codsty + compno; |
| Jpeg2000QuantStyle *qntsty = tile->qntsty + compno; |
| int ret; // global bandno |
| |
| comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x); |
| comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width); |
| comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y); |
| comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height); |
| |
| comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor); |
| comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor); |
| comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor); |
| comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor); |
| |
| if (ret = ff_jpeg2000_init_component(comp, codsty, qntsty, |
| s->cbps[compno], s->cdx[compno], |
| s->cdy[compno], s->avctx)) |
| return ret; |
| } |
| return 0; |
| } |
| |
| /* Read the number of coding passes. */ |
| static int getnpasses(Jpeg2000DecoderContext *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(Jpeg2000DecoderContext *s) |
| { |
| int res = 0, ret; |
| while (ret = get_bits(s, 1)) { |
| if (ret < 0) |
| return ret; |
| res++; |
| } |
| return res; |
| } |
| |
| static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, |
| Jpeg2000CodingStyle *codsty, |
| Jpeg2000ResLevel *rlevel, int precno, |
| int layno, uint8_t *expn, int numgbits) |
| { |
| int bandno, cblkno, ret, nb_code_blocks; |
| |
| if (!(ret = get_bits(s, 1))) { |
| jpeg2000_flush(s); |
| return 0; |
| } else if (ret < 0) |
| return ret; |
| |
| for (bandno = 0; bandno < rlevel->nbands; bandno++) { |
| Jpeg2000Band *band = rlevel->band + bandno; |
| Jpeg2000Prec *prec = band->prec + precno; |
| |
| if (band->coord[0][0] == band->coord[0][1] || |
| band->coord[1][0] == band->coord[1][1]) |
| continue; |
| nb_code_blocks = prec->nb_codeblocks_height * |
| prec->nb_codeblocks_width; |
| for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) { |
| Jpeg2000Cblk *cblk = prec->cblk + cblkno; |
| int incl, newpasses, llen; |
| |
| if (cblk->npasses) |
| incl = get_bits(s, 1); |
| else |
| incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno; |
| if (!incl) |
| continue; |
| else if (incl < 0) |
| return incl; |
| |
| if (!cblk->npasses) { |
| int v = expn[bandno] + numgbits - 1 - |
| tag_tree_decode(s, prec->zerobits + cblkno, 100); |
| if (v < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "nonzerobits %d invalid\n", v); |
| return AVERROR_INVALIDDATA; |
| } |
| cblk->nonzerobits = v; |
| } |
| 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; |
| if (ret > sizeof(cblk->data)) { |
| avpriv_request_sample(s->avctx, |
| "Block with lengthinc greater than %zu", |
| sizeof(cblk->data)); |
| return AVERROR_PATCHWELCOME; |
| } |
| cblk->lengthinc = ret; |
| cblk->npasses += newpasses; |
| } |
| } |
| jpeg2000_flush(s); |
| |
| if (codsty->csty & JPEG2000_CSTY_EPH) { |
| if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH) |
| bytestream2_skip(&s->g, 2); |
| else |
| av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n"); |
| } |
| |
| for (bandno = 0; bandno < rlevel->nbands; bandno++) { |
| Jpeg2000Band *band = rlevel->band + bandno; |
| Jpeg2000Prec *prec = band->prec + precno; |
| |
| nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width; |
| for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) { |
| Jpeg2000Cblk *cblk = prec->cblk + cblkno; |
| if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc |
| || sizeof(cblk->data) < cblk->length + cblk->lengthinc + 2 |
| ) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "Block length %d or lengthinc %d is too large\n", |
| cblk->length, cblk->lengthinc); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| bytestream2_get_bufferu(&s->g, cblk->data + cblk->length, cblk->lengthinc); |
| cblk->length += cblk->lengthinc; |
| cblk->lengthinc = 0; |
| } |
| } |
| return 0; |
| } |
| |
| static int jpeg2000_decode_packets(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile) |
| { |
| int ret = 0; |
| int layno, reslevelno, compno, precno, ok_reslevel; |
| int x, y; |
| |
| s->bit_index = 8; |
| switch (tile->codsty[0].prog_order) { |
| case JPEG2000_PGOD_RLCP: |
| avpriv_request_sample(s->avctx, "Progression order RLCP"); |
| |
| case JPEG2000_PGOD_LRCP: |
| 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++) { |
| Jpeg2000CodingStyle *codsty = tile->codsty + compno; |
| Jpeg2000QuantStyle *qntsty = tile->qntsty + compno; |
| if (reslevelno < codsty->nreslevels) { |
| Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + |
| reslevelno; |
| ok_reslevel = 1; |
| for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) |
| if ((ret = jpeg2000_decode_packet(s, |
| codsty, rlevel, |
| precno, layno, |
| qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0), |
| qntsty->nguardbits)) < 0) |
| return ret; |
| } |
| } |
| } |
| } |
| break; |
| |
| case JPEG2000_PGOD_CPRL: |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| Jpeg2000CodingStyle *codsty = tile->codsty + compno; |
| Jpeg2000QuantStyle *qntsty = tile->qntsty + compno; |
| |
| /* Set bit stream buffer address according to tile-part. |
| * For DCinema one tile-part per component, so can be |
| * indexed by component. */ |
| s->g = tile->tile_part[compno].tpg; |
| |
| /* Position loop (y axis) |
| * TODO: Automate computing of step 256. |
| * Fixed here, but to be computed before entering here. */ |
| for (y = 0; y < s->height; y += 256) { |
| /* Position loop (y axis) |
| * TODO: automate computing of step 256. |
| * Fixed here, but to be computed before entering here. */ |
| for (x = 0; x < s->width; x += 256) { |
| for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) { |
| uint16_t prcx, prcy; |
| uint8_t reducedresno = codsty->nreslevels - 1 -reslevelno; // ==> N_L - r |
| Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno; |
| |
| if (!((y % (1 << (rlevel->log2_prec_height + reducedresno)) == 0) || |
| (y == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema |
| continue; |
| |
| if (!((x % (1 << (rlevel->log2_prec_width + reducedresno)) == 0) || |
| (x == 0))) // TODO: 2nd condition simplified as try0 always =0 for dcinema |
| continue; |
| |
| // check if a precinct exists |
| prcx = ff_jpeg2000_ceildivpow2(x, reducedresno) >> rlevel->log2_prec_width; |
| prcy = ff_jpeg2000_ceildivpow2(y, reducedresno) >> rlevel->log2_prec_height; |
| precno = prcx + rlevel->num_precincts_x * prcy; |
| |
| if (prcx >= rlevel->num_precincts_x || prcy >= rlevel->num_precincts_y) |
| return AVERROR_PATCHWELCOME; |
| |
| for (layno = 0; layno < tile->codsty[0].nlayers; layno++) { |
| if ((ret = jpeg2000_decode_packet(s, codsty, rlevel, |
| precno, layno, |
| qntsty->expn + (reslevelno ? 3 * (reslevelno - 1) + 1 : 0), |
| qntsty->nguardbits)) < 0) |
| return ret; |
| } |
| } |
| } |
| } |
| } |
| break; |
| |
| case JPEG2000_PGOD_RPCL: |
| avpriv_request_sample(s->avctx, "Progression order RPCL"); |
| ret = AVERROR_PATCHWELCOME; |
| break; |
| |
| case JPEG2000_PGOD_PCRL: |
| avpriv_request_sample(s->avctx, "Progression order PCRL"); |
| ret = AVERROR_PATCHWELCOME; |
| break; |
| |
| default: |
| break; |
| } |
| |
| /* EOC marker reached */ |
| bytestream2_skip(&s->g, 2); |
| |
| return ret; |
| } |
| |
| /* TIER-1 routines */ |
| static void decode_sigpass(Jpeg2000T1Context *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] & JPEG2000_T1_SIG_NB) |
| && !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) { |
| int flags_mask = -1; |
| if (vert_causal_ctx_csty_symbol && y == y0 + 3) |
| flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE); |
| if (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, bandno))) { |
| int xorbit, ctxno = ff_jpeg2000_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_jpeg2000_set_significance(t1, x, y, |
| t1->data[y][x] < 0); |
| } |
| t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS; |
| } |
| } |
| } |
| |
| static void decode_refpass(Jpeg2000T1Context *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] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) { |
| int ctxno = ff_jpeg2000_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] |= JPEG2000_T1_REF; |
| } |
| } |
| |
| static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1, |
| int width, int height, int bpno, int bandno, |
| int seg_symbols, int vert_causal_ctx_csty_symbol) |
| { |
| 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] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) || |
| (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) || |
| (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) || |
| (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_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] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) { |
| int flags_mask = -1; |
| if (vert_causal_ctx_csty_symbol && y == y0 + 3) |
| flags_mask &= ~(JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_SW | JPEG2000_T1_SIG_SE); |
| dec = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ff_jpeg2000_getsigctxno(t1->flags[y+1][x+1] & flags_mask, |
| bandno)); |
| } |
| } |
| if (dec) { |
| int xorbit; |
| int ctxno = ff_jpeg2000_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_jpeg2000_set_significance(t1, x, y, t1->data[y][x] < 0); |
| } |
| dec = 0; |
| t1->flags[y + 1][x + 1] &= ~JPEG2000_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(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, |
| Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, |
| int width, int height, int bandpos) |
| { |
| int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y; |
| int clnpass_cnt = 0; |
| int bpass_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_BYPASS; |
| int vert_causal_ctx_csty_symbol = codsty->cblk_style & JPEG2000_CBLK_VSC; |
| |
| av_assert0(width <= JPEG2000_MAX_CBLKW); |
| av_assert0(height <= JPEG2000_MAX_CBLKH); |
| |
| for (y = 0; y < height; y++) |
| memset(t1->data[y], 0, width * sizeof(**t1->data)); |
| |
| /* If code-block contains no compressed data: nothing to do. */ |
| if (!cblk->length) |
| return 0; |
| |
| for (y = 0; y < height + 2; y++) |
| memset(t1->flags[y], 0, (width + 2) * sizeof(**t1->flags)); |
| |
| 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 & JPEG2000_CBLK_SEGSYM, |
| vert_causal_ctx_csty_symbol); |
| 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; |
| } |
| |
| /* TODO: Verify dequantization for lossless case |
| * comp->data can be float or int |
| * band->stepsize can be float or int |
| * depending on the type of DWT transformation. |
| * see ISO/IEC 15444-1:2002 A.6.1 */ |
| |
| /* Float dequantization of a codeblock.*/ |
| static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk, |
| Jpeg2000Component *comp, |
| Jpeg2000T1Context *t1, Jpeg2000Band *band) |
| { |
| int i, j; |
| int w = cblk->coord[0][1] - cblk->coord[0][0]; |
| for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) { |
| float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x]; |
| int *src = t1->data[j]; |
| for (i = 0; i < w; ++i) |
| datap[i] = src[i] * band->f_stepsize; |
| } |
| } |
| |
| /* Integer dequantization of a codeblock.*/ |
| static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk, |
| Jpeg2000Component *comp, |
| Jpeg2000T1Context *t1, Jpeg2000Band *band) |
| { |
| int i, j; |
| int w = cblk->coord[0][1] - cblk->coord[0][0]; |
| for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) { |
| int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x]; |
| int *src = t1->data[j]; |
| for (i = 0; i < w; ++i) |
| datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15; |
| } |
| } |
| |
| /* Inverse ICT parameters in float and integer. |
| * int value = (float value) * (1<<16) */ |
| static const float f_ict_params[4] = { |
| 1.402f, |
| 0.34413f, |
| 0.71414f, |
| 1.772f |
| }; |
| static const int i_ict_params[4] = { |
| 91881, |
| 22553, |
| 46802, |
| 116130 |
| }; |
| |
| static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile) |
| { |
| int i, csize = 1; |
| int32_t *src[3], i0, i1, i2; |
| float *srcf[3], i0f, i1f, i2f; |
| |
| for (i = 1; i < 3; i++) |
| if (tile->codsty[0].transform != tile->codsty[i].transform) { |
| av_log(s->avctx, AV_LOG_ERROR, "Transforms mismatch, MCT not supported\n"); |
| return; |
| } |
| |
| for (i = 0; i < 3; i++) |
| if (tile->codsty[0].transform == FF_DWT97) |
| srcf[i] = tile->comp[i].f_data; |
| else |
| src [i] = tile->comp[i].i_data; |
| |
| for (i = 0; i < 2; i++) |
| csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0]; |
| |
| switch (tile->codsty[0].transform) { |
| case FF_DWT97: |
| for (i = 0; i < csize; i++) { |
| i0f = *srcf[0] + (f_ict_params[0] * *srcf[2]); |
| i1f = *srcf[0] - (f_ict_params[1] * *srcf[1]) |
| - (f_ict_params[2] * *srcf[2]); |
| i2f = *srcf[0] + (f_ict_params[3] * *srcf[1]); |
| *srcf[0]++ = i0f; |
| *srcf[1]++ = i1f; |
| *srcf[2]++ = i2f; |
| } |
| break; |
| case FF_DWT97_INT: |
| for (i = 0; i < csize; i++) { |
| i0 = *src[0] + (((i_ict_params[0] * *src[2]) + (1 << 15)) >> 16); |
| i1 = *src[0] - (((i_ict_params[1] * *src[1]) + (1 << 15)) >> 16) |
| - (((i_ict_params[2] * *src[2]) + (1 << 15)) >> 16); |
| i2 = *src[0] + (((i_ict_params[3] * *src[1]) + (1 << 15)) >> 16); |
| *src[0]++ = i0; |
| *src[1]++ = i1; |
| *src[2]++ = i2; |
| } |
| break; |
| case FF_DWT53: |
| 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; |
| } |
| break; |
| } |
| } |
| |
| static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, |
| AVFrame *picture) |
| { |
| const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(s->avctx->pix_fmt); |
| int compno, reslevelno, bandno; |
| int x, y; |
| int planar = !!(pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR); |
| int pixelsize = planar ? 1 : pixdesc->nb_components; |
| |
| uint8_t *line; |
| Jpeg2000T1Context t1; |
| |
| /* Loop on tile components */ |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| Jpeg2000Component *comp = tile->comp + compno; |
| Jpeg2000CodingStyle *codsty = tile->codsty + compno; |
| |
| /* Loop on resolution levels */ |
| for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) { |
| Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno; |
| /* Loop on bands */ |
| for (bandno = 0; bandno < rlevel->nbands; bandno++) { |
| int nb_precincts, precno; |
| Jpeg2000Band *band = rlevel->band + bandno; |
| int cblkno = 0, bandpos; |
| |
| bandpos = bandno + (reslevelno > 0); |
| |
| if (band->coord[0][0] == band->coord[0][1] || |
| band->coord[1][0] == band->coord[1][1]) |
| continue; |
| |
| nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y; |
| /* Loop on precincts */ |
| for (precno = 0; precno < nb_precincts; precno++) { |
| Jpeg2000Prec *prec = band->prec + precno; |
| |
| /* Loop on codeblocks */ |
| for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) { |
| int x, y; |
| Jpeg2000Cblk *cblk = prec->cblk + cblkno; |
| decode_cblk(s, codsty, &t1, cblk, |
| cblk->coord[0][1] - cblk->coord[0][0], |
| cblk->coord[1][1] - cblk->coord[1][0], |
| bandpos); |
| |
| x = cblk->coord[0][0]; |
| y = cblk->coord[1][0]; |
| |
| if (codsty->transform == FF_DWT97) |
| dequantization_float(x, y, cblk, comp, &t1, band); |
| else |
| dequantization_int(x, y, cblk, comp, &t1, band); |
| } /* end cblk */ |
| } /*end prec */ |
| } /* end band */ |
| } /* end reslevel */ |
| |
| /* inverse DWT */ |
| ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data); |
| } /*end comp */ |
| |
| /* inverse MCT transformation */ |
| if (tile->codsty[0].mct) |
| mct_decode(s, tile); |
| |
| if (s->cdef[0] < 0) { |
| for (x = 0; x < s->ncomponents; x++) |
| s->cdef[x] = x + 1; |
| if ((s->ncomponents & 1) == 0) |
| s->cdef[s->ncomponents-1] = 0; |
| } |
| |
| if (s->precision <= 8) { |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| Jpeg2000Component *comp = tile->comp + compno; |
| Jpeg2000CodingStyle *codsty = tile->codsty + compno; |
| float *datap = comp->f_data; |
| int32_t *i_datap = comp->i_data; |
| int cbps = s->cbps[compno]; |
| int w = tile->comp[compno].coord[0][1] - s->image_offset_x; |
| int plane = 0; |
| |
| if (planar) |
| plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1); |
| |
| |
| y = tile->comp[compno].coord[1][0] - s->image_offset_y; |
| line = picture->data[plane] + y / s->cdy[compno] * picture->linesize[plane]; |
| 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->cdx[compno] * pixelsize + compno*!planar; |
| |
| if (codsty->transform == FF_DWT97) { |
| for (; x < w; x += s->cdx[compno]) { |
| int val = lrintf(*datap) + (1 << (cbps - 1)); |
| /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ |
| val = av_clip(val, 0, (1 << cbps) - 1); |
| *dst = val << (8 - cbps); |
| datap++; |
| dst += pixelsize; |
| } |
| } else { |
| for (; x < w; x += s->cdx[compno]) { |
| int val = *i_datap + (1 << (cbps - 1)); |
| /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ |
| val = av_clip(val, 0, (1 << cbps) - 1); |
| *dst = val << (8 - cbps); |
| i_datap++; |
| dst += pixelsize; |
| } |
| } |
| line += picture->linesize[plane]; |
| } |
| } |
| } else { |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| Jpeg2000Component *comp = tile->comp + compno; |
| Jpeg2000CodingStyle *codsty = tile->codsty + compno; |
| float *datap = comp->f_data; |
| int32_t *i_datap = comp->i_data; |
| uint16_t *linel; |
| int cbps = s->cbps[compno]; |
| int w = tile->comp[compno].coord[0][1] - s->image_offset_x; |
| int plane = 0; |
| |
| if (planar) |
| plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1); |
| |
| y = tile->comp[compno].coord[1][0] - s->image_offset_y; |
| linel = (uint16_t *)picture->data[plane] + y / s->cdy[compno] * (picture->linesize[plane] >> 1); |
| 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 = linel + (x / s->cdx[compno] * pixelsize + compno*!planar); |
| if (codsty->transform == FF_DWT97) { |
| for (; x < w; x += s-> cdx[compno]) { |
| int val = lrintf(*datap) + (1 << (cbps - 1)); |
| /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ |
| val = av_clip(val, 0, (1 << cbps) - 1); |
| /* align 12 bit values in little-endian mode */ |
| *dst = val << (16 - cbps); |
| datap++; |
| dst += pixelsize; |
| } |
| } else { |
| for (; x < w; x += s-> cdx[compno]) { |
| int val = *i_datap + (1 << (cbps - 1)); |
| /* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ |
| val = av_clip(val, 0, (1 << cbps) - 1); |
| /* align 12 bit values in little-endian mode */ |
| *dst = val << (16 - cbps); |
| i_datap++; |
| dst += pixelsize; |
| } |
| } |
| linel += picture->linesize[plane] >> 1; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s) |
| { |
| int tileno, compno; |
| for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) { |
| if (s->tile[tileno].comp) { |
| for (compno = 0; compno < s->ncomponents; compno++) { |
| Jpeg2000Component *comp = s->tile[tileno].comp + compno; |
| Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno; |
| |
| ff_jpeg2000_cleanup(comp, codsty); |
| } |
| av_freep(&s->tile[tileno].comp); |
| } |
| } |
| av_freep(&s->tile); |
| memset(s->codsty, 0, sizeof(s->codsty)); |
| memset(s->qntsty, 0, sizeof(s->qntsty)); |
| s->numXtiles = s->numYtiles = 0; |
| } |
| |
| static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s) |
| { |
| Jpeg2000CodingStyle *codsty = s->codsty; |
| Jpeg2000QuantStyle *qntsty = s->qntsty; |
| uint8_t *properties = s->properties; |
| |
| for (;;) { |
| int len, ret = 0; |
| uint16_t marker; |
| int oldpos; |
| |
| if (bytestream2_get_bytes_left(&s->g) < 2) { |
| av_log(s->avctx, AV_LOG_ERROR, "Missing EOC\n"); |
| break; |
| } |
| |
| marker = bytestream2_get_be16u(&s->g); |
| oldpos = bytestream2_tell(&s->g); |
| |
| if (marker == JPEG2000_SOD) { |
| Jpeg2000Tile *tile; |
| Jpeg2000TilePart *tp; |
| |
| if (!s->tile) { |
| av_log(s->avctx, AV_LOG_ERROR, "Missing SIZ\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->curtileno < 0) { |
| av_log(s->avctx, AV_LOG_ERROR, "Missing SOT\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| tile = s->tile + s->curtileno; |
| tp = tile->tile_part + tile->tp_idx; |
| if (tp->tp_end < s->g.buffer) { |
| av_log(s->avctx, AV_LOG_ERROR, "Invalid tpend\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| bytestream2_init(&tp->tpg, s->g.buffer, tp->tp_end - s->g.buffer); |
| bytestream2_skip(&s->g, tp->tp_end - s->g.buffer); |
| |
| continue; |
| } |
| if (marker == JPEG2000_EOC) |
| break; |
| |
| len = bytestream2_get_be16(&s->g); |
| if (len < 2 || bytestream2_get_bytes_left(&s->g) < len - 2) |
| return AVERROR_INVALIDDATA; |
| |
| switch (marker) { |
| case JPEG2000_SIZ: |
| ret = get_siz(s); |
| if (!s->tile) |
| s->numXtiles = s->numYtiles = 0; |
| break; |
| case JPEG2000_COC: |
| ret = get_coc(s, codsty, properties); |
| break; |
| case JPEG2000_COD: |
| ret = get_cod(s, codsty, properties); |
| break; |
| case JPEG2000_QCC: |
| ret = get_qcc(s, len, qntsty, properties); |
| break; |
| case JPEG2000_QCD: |
| ret = get_qcd(s, len, qntsty, properties); |
| break; |
| case JPEG2000_SOT: |
| if (!(ret = get_sot(s, len))) { |
| av_assert1(s->curtileno >= 0); |
| codsty = s->tile[s->curtileno].codsty; |
| qntsty = s->tile[s->curtileno].qntsty; |
| properties = s->tile[s->curtileno].properties; |
| } |
| break; |
| case JPEG2000_COM: |
| // the comment is ignored |
| bytestream2_skip(&s->g, len - 2); |
| break; |
| case JPEG2000_TLM: |
| // Tile-part lengths |
| ret = get_tlm(s, len); |
| break; |
| default: |
| av_log(s->avctx, AV_LOG_ERROR, |
| "unsupported marker 0x%.4X at pos 0x%X\n", |
| marker, bytestream2_tell(&s->g) - 4); |
| bytestream2_skip(&s->g, len - 2); |
| break; |
| } |
| if (bytestream2_tell(&s->g) - oldpos != len || ret) { |
| av_log(s->avctx, AV_LOG_ERROR, |
| "error during processing marker segment %.4x\n", marker); |
| return ret ? ret : -1; |
| } |
| } |
| return 0; |
| } |
| |
| /* Read bit stream packets --> T2 operation. */ |
| static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s) |
| { |
| int ret = 0; |
| int tileno; |
| |
| for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) { |
| Jpeg2000Tile *tile = s->tile + tileno; |
| |
| if (ret = init_tile(s, tileno)) |
| return ret; |
| |
| s->g = tile->tile_part[0].tpg; |
| if (ret = jpeg2000_decode_packets(s, tile)) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int jp2_find_codestream(Jpeg2000DecoderContext *s) |
| { |
| uint32_t atom_size, atom, atom_end; |
| int search_range = 10; |
| |
| while (search_range |
| && |
| bytestream2_get_bytes_left(&s->g) >= 8) { |
| atom_size = bytestream2_get_be32u(&s->g); |
| atom = bytestream2_get_be32u(&s->g); |
| atom_end = bytestream2_tell(&s->g) + atom_size - 8; |
| |
| if (atom == JP2_CODESTREAM) |
| return 1; |
| |
| if (bytestream2_get_bytes_left(&s->g) < atom_size || atom_end < atom_size) |
| return 0; |
| |
| if (atom == JP2_HEADER && |
| atom_size >= 16) { |
| uint32_t atom2_size, atom2, atom2_end; |
| do { |
| atom2_size = bytestream2_get_be32u(&s->g); |
| atom2 = bytestream2_get_be32u(&s->g); |
| atom2_end = bytestream2_tell(&s->g) + atom2_size - 8; |
| if (atom2_size < 8 || atom2_end > atom_end || atom2_end < atom2_size) |
| break; |
| if (atom2 == JP2_CODESTREAM) { |
| return 1; |
| } else if (atom2 == MKBETAG('c','o','l','r') && atom2_size >= 7) { |
| int method = bytestream2_get_byteu(&s->g); |
| bytestream2_skipu(&s->g, 2); |
| if (method == 1) { |
| s->colour_space = bytestream2_get_be32u(&s->g); |
| } |
| } else if (atom2 == MKBETAG('p','c','l','r') && atom2_size >= 6) { |
| int i, size, colour_count, colour_channels, colour_depth[3]; |
| uint32_t r, g, b; |
| colour_count = bytestream2_get_be16u(&s->g); |
| colour_channels = bytestream2_get_byteu(&s->g); |
| // FIXME: Do not ignore channel_sign |
| colour_depth[0] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1; |
| colour_depth[1] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1; |
| colour_depth[2] = (bytestream2_get_byteu(&s->g) & 0x7f) + 1; |
| size = (colour_depth[0] + 7 >> 3) * colour_count + |
| (colour_depth[1] + 7 >> 3) * colour_count + |
| (colour_depth[2] + 7 >> 3) * colour_count; |
| if (colour_count > 256 || |
| colour_channels != 3 || |
| colour_depth[0] > 16 || |
| colour_depth[1] > 16 || |
| colour_depth[2] > 16 || |
| atom2_size < size) { |
| avpriv_request_sample(s->avctx, "Unknown palette"); |
| bytestream2_seek(&s->g, atom2_end, SEEK_SET); |
| continue; |
| } |
| s->pal8 = 1; |
| for (i = 0; i < colour_count; i++) { |
| if (colour_depth[0] <= 8) { |
| r = bytestream2_get_byteu(&s->g) << 8 - colour_depth[0]; |
| r |= r >> colour_depth[0]; |
| } else { |
| r = bytestream2_get_be16u(&s->g) >> colour_depth[0] - 8; |
| } |
| if (colour_depth[1] <= 8) { |
| g = bytestream2_get_byteu(&s->g) << 8 - colour_depth[1]; |
| r |= r >> colour_depth[1]; |
| } else { |
| g = bytestream2_get_be16u(&s->g) >> colour_depth[1] - 8; |
| } |
| if (colour_depth[2] <= 8) { |
| b = bytestream2_get_byteu(&s->g) << 8 - colour_depth[2]; |
| r |= r >> colour_depth[2]; |
| } else { |
| b = bytestream2_get_be16u(&s->g) >> colour_depth[2] - 8; |
| } |
| s->palette[i] = 0xffu << 24 | r << 16 | g << 8 | b; |
| } |
| } else if (atom2 == MKBETAG('c','d','e','f') && atom2_size >= 2) { |
| int n = bytestream2_get_be16u(&s->g); |
| for (; n>0; n--) { |
| int cn = bytestream2_get_be16(&s->g); |
| int av_unused typ = bytestream2_get_be16(&s->g); |
| int asoc = bytestream2_get_be16(&s->g); |
| if (cn < 4 || asoc < 4) |
| s->cdef[cn] = asoc; |
| } |
| } |
| bytestream2_seek(&s->g, atom2_end, SEEK_SET); |
| } while (atom_end - atom2_end >= 8); |
| } else { |
| search_range--; |
| } |
| bytestream2_seek(&s->g, atom_end, SEEK_SET); |
| } |
| |
| return 0; |
| } |
| |
| static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame, AVPacket *avpkt) |
| { |
| Jpeg2000DecoderContext *s = avctx->priv_data; |
| ThreadFrame frame = { .f = data }; |
| AVFrame *picture = data; |
| int tileno, ret; |
| |
| s->avctx = avctx; |
| bytestream2_init(&s->g, avpkt->data, avpkt->size); |
| s->curtileno = -1; |
| memset(s->cdef, -1, sizeof(s->cdef)); |
| |
| if (bytestream2_get_bytes_left(&s->g) < 2) { |
| ret = AVERROR_INVALIDDATA; |
| goto end; |
| } |
| |
| // check if the image is in jp2 format |
| if (bytestream2_get_bytes_left(&s->g) >= 12 && |
| (bytestream2_get_be32u(&s->g) == 12) && |
| (bytestream2_get_be32u(&s->g) == JP2_SIG_TYPE) && |
| (bytestream2_get_be32u(&s->g) == JP2_SIG_VALUE)) { |
| if (!jp2_find_codestream(s)) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Could not find Jpeg2000 codestream atom.\n"); |
| ret = AVERROR_INVALIDDATA; |
| goto end; |
| } |
| } else { |
| bytestream2_seek(&s->g, 0, SEEK_SET); |
| } |
| |
| while (bytestream2_get_bytes_left(&s->g) >= 3 && bytestream2_peek_be16(&s->g) != JPEG2000_SOC) |
| bytestream2_skip(&s->g, 1); |
| |
| if (bytestream2_get_be16u(&s->g) != JPEG2000_SOC) { |
| av_log(avctx, AV_LOG_ERROR, "SOC marker not present\n"); |
| ret = AVERROR_INVALIDDATA; |
| goto end; |
| } |
| if (ret = jpeg2000_read_main_headers(s)) |
| goto end; |
| |
| /* get picture buffer */ |
| if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) |
| goto end; |
| picture->pict_type = AV_PICTURE_TYPE_I; |
| picture->key_frame = 1; |
| |
| if (ret = jpeg2000_read_bitstream_packets(s)) |
| goto end; |
| |
| for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) |
| if (ret = jpeg2000_decode_tile(s, s->tile + tileno, picture)) |
| goto end; |
| |
| jpeg2000_dec_cleanup(s); |
| |
| *got_frame = 1; |
| |
| if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) |
| memcpy(picture->data[1], s->palette, 256 * sizeof(uint32_t)); |
| |
| return bytestream2_tell(&s->g); |
| |
| end: |
| jpeg2000_dec_cleanup(s); |
| return ret; |
| } |
| |
| static void jpeg2000_init_static_data(AVCodec *codec) |
| { |
| ff_jpeg2000_init_tier1_luts(); |
| ff_mqc_init_context_tables(); |
| } |
| |
| #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x) |
| #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM |
| |
| static const AVOption options[] = { |
| { "lowres", "Lower the decoding resolution by a power of two", |
| OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD }, |
| { NULL }, |
| }; |
| |
| static const AVProfile profiles[] = { |
| { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" }, |
| { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" }, |
| { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" }, |
| { FF_PROFILE_JPEG2000_DCINEMA_2K, "JPEG 2000 digital cinema 2K" }, |
| { FF_PROFILE_JPEG2000_DCINEMA_4K, "JPEG 2000 digital cinema 4K" }, |
| { FF_PROFILE_UNKNOWN }, |
| }; |
| |
| static const AVClass jpeg2000_class = { |
| .class_name = "jpeg2000", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVCodec ff_jpeg2000_decoder = { |
| .name = "jpeg2000", |
| .long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_JPEG2000, |
| .capabilities = CODEC_CAP_FRAME_THREADS, |
| .priv_data_size = sizeof(Jpeg2000DecoderContext), |
| .init_static_data = jpeg2000_init_static_data, |
| .decode = jpeg2000_decode_frame, |
| .priv_class = &jpeg2000_class, |
| .max_lowres = 5, |
| .profiles = NULL_IF_CONFIG_SMALL(profiles) |
| }; |