0,0 → 1,1728 |
/* |
* 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 (s->avctx->pix_fmt == AV_PIX_FMT_NONE) { |
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); |
} |
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; |
|
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; |
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) |
{ |
int compno, reslevelno, bandno; |
int x, y; |
|
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 planar = !!picture->data[2]; |
int pixelsize = planar ? 1 : s->ncomponents; |
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 planar = !!picture->data[2]; |
int pixelsize = planar ? 1 : s->ncomponents; |
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) |
}; |