6ba04c2b |
/*
* JPEG-LS decoder
* Copyright (c) 2003 Michael Niedermayer
* Copyright (c) 2006 Konstantin Shishkov
*
* 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
*/
/** |
ba87f080 |
* @file |
6ba04c2b |
* JPEG-LS decoder.
*/
#include "avcodec.h" |
9106a698 |
#include "get_bits.h" |
6ba04c2b |
#include "golomb.h" |
199436b9 |
#include "mathops.h" |
6ba04c2b |
#include "mjpeg.h" |
5acd8d9e |
#include "mjpegdec.h" |
6ba04c2b |
#include "jpegls.h"
#include "jpeglsdec.h"
/* |
ff4fc5ef |
* Uncomment this to significantly speed up decoding of broken JPEG-LS
* (or test broken JPEG-LS decoder) and slow down ordinary decoding a bit.
*
* There is no Golomb code with length >= 32 bits possible, so check and |
39354d60 |
* avoid situation of 32 zeros, FFmpeg Golomb decoder is painfully slow |
ff4fc5ef |
* on this errors.
*/ |
6ba04c2b |
//#define JLS_BROKEN
/**
* Decode LSE block with initialization parameters
*/
int ff_jpegls_decode_lse(MJpegDecodeContext *s)
{ |
727af82a |
int id; |
254f653b |
int tid, wt, maxtab, i, j; |
6ba04c2b |
|
2773ab36 |
int len = get_bits(&s->gb, 16); |
6ba04c2b |
id = get_bits(&s->gb, 8);
|
ff4fc5ef |
switch (id) { |
6ba04c2b |
case 1: |
2773ab36 |
if (len < 13)
return AVERROR_INVALIDDATA;
|
ff4fc5ef |
s->maxval = get_bits(&s->gb, 16);
s->t1 = get_bits(&s->gb, 16);
s->t2 = get_bits(&s->gb, 16);
s->t3 = get_bits(&s->gb, 16);
s->reset = get_bits(&s->gb, 16); |
6ba04c2b |
|
88ceede1 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO) {
av_log(s->avctx, AV_LOG_DEBUG, "Coding parameters maxval:%d T1:%d T2:%d T3:%d reset:%d\n",
s->maxval, s->t1, s->t2, s->t3, s->reset);
}
|
6ba04c2b |
// ff_jpegls_reset_coding_parameters(s, 0);
//FIXME quant table?
break;
case 2: |
254f653b |
s->palette_index = 0; |
6ba04c2b |
case 3: |
254f653b |
tid= get_bits(&s->gb, 8);
wt = get_bits(&s->gb, 8);
if (len < 5)
return AVERROR_INVALIDDATA;
if (wt < 1 || wt > MAX_COMPONENTS) {
avpriv_request_sample(s->avctx, "wt %d", wt);
return AVERROR_PATCHWELCOME;
}
|
fd2bcfc4 |
if (!s->maxval)
maxtab = 255;
else if ((5 + wt*(s->maxval+1)) < 65535) |
254f653b |
maxtab = s->maxval;
else
maxtab = 65530/wt - 1;
if(s->avctx->debug & FF_DEBUG_PICT_INFO) {
av_log(s->avctx, AV_LOG_DEBUG, "LSE palette %d tid:%d wt:%d maxtab:%d\n", id, tid, wt, maxtab);
}
if (maxtab >= 256) {
avpriv_request_sample(s->avctx, ">8bit palette");
return AVERROR_PATCHWELCOME;
}
maxtab = FFMIN(maxtab, (len - 5) / wt + s->palette_index);
if (s->palette_index > maxtab)
return AVERROR_INVALIDDATA;
if ((s->avctx->pix_fmt == AV_PIX_FMT_GRAY8 || s->avctx->pix_fmt == AV_PIX_FMT_PAL8) &&
(s->picture_ptr->format == AV_PIX_FMT_GRAY8 || s->picture_ptr->format == AV_PIX_FMT_PAL8)) { |
0a5cc20d |
uint32_t *pal = (uint32_t *)s->picture_ptr->data[1]; |
254f653b |
s->picture_ptr->format =
s->avctx->pix_fmt = AV_PIX_FMT_PAL8; |
fd2bcfc4 |
for (i=s->palette_index; i<=maxtab; i++) { |
254f653b |
pal[i] = 0;
for (j=0; j<wt; j++) { |
fd2bcfc4 |
pal[i] |= get_bits(&s->gb, 8) << (8*(wt-j-1)); |
254f653b |
}
}
s->palette_index = i;
}
break; |
6ba04c2b |
case 4: |
020600ee |
avpriv_request_sample(s->avctx, "oversize image"); |
a5a0ef5e |
return AVERROR(ENOSYS); |
6ba04c2b |
default:
av_log(s->avctx, AV_LOG_ERROR, "invalid id %d\n", id); |
a5a0ef5e |
return AVERROR_INVALIDDATA; |
6ba04c2b |
} |
1218777f |
av_dlog(s->avctx, "ID=%i, T=%i,%i,%i\n", id, s->t1, s->t2, s->t3); |
6ba04c2b |
return 0;
}
/**
* Get context-dependent Golomb code, decode it and update context
*/ |
ff4fc5ef |
static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
{ |
6ba04c2b |
int k, ret;
|
ff4fc5ef |
for (k = 0; (state->N[Q] << k) < state->A[Q]; k++)
; |
6ba04c2b |
#ifdef JLS_BROKEN |
ff4fc5ef |
if (!show_bits_long(gb, 32))
return -1; |
6ba04c2b |
#endif
ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);
/* decode mapped error */ |
ff4fc5ef |
if (ret & 1) |
9cacdabd |
ret = -(ret + 1 >> 1); |
6ba04c2b |
else
ret >>= 1;
/* for NEAR=0, k=0 and 2*B[Q] <= - N[Q] mapping is reversed */ |
ff4fc5ef |
if (!state->near && !k && (2 * state->B[Q] <= -state->N[Q])) |
6ba04c2b |
ret = -(ret + 1);
|
ff4fc5ef |
ret = ff_jpegls_update_state_regular(state, Q, ret); |
6ba04c2b |
return ret;
}
/**
* Get Golomb code, decode it and update state for run termination
*/ |
ff4fc5ef |
static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state,
int RItype, int limit_add)
{ |
6ba04c2b |
int k, ret, temp, map;
int Q = 365 + RItype;
|
ff4fc5ef |
temp = state->A[Q];
if (RItype) |
6ba04c2b |
temp += state->N[Q] >> 1;
|
ff4fc5ef |
for (k = 0; (state->N[Q] << k) < temp; k++)
; |
6ba04c2b |
#ifdef JLS_BROKEN |
ff4fc5ef |
if (!show_bits_long(gb, 32))
return -1; |
6ba04c2b |
#endif |
ff4fc5ef |
ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1,
state->qbpp); |
6ba04c2b |
/* decode mapped error */
map = 0; |
ff4fc5ef |
if (!k && (RItype || ret) && (2 * state->B[Q] < state->N[Q])) |
6ba04c2b |
map = 1;
ret += RItype + map;
|
ff4fc5ef |
if (ret & 1) { |
9cacdabd |
ret = map - (ret + 1 >> 1); |
6ba04c2b |
state->B[Q]++;
} else {
ret = ret >> 1;
}
|
cc0e47b5 |
if(FFABS(ret) > 0xFFFF)
return -0x10000; |
6ba04c2b |
/* update state */
state->A[Q] += FFABS(ret) - RItype; |
ff4fc5ef |
ret *= state->twonear; |
6ba04c2b |
ff_jpegls_downscale_state(state, Q);
return ret;
}
/**
* Decode one line of image
*/ |
ff4fc5ef |
static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s,
void *last, void *dst, int last2, int w,
int stride, int comp, int bits)
{ |
6ba04c2b |
int i, x = 0;
int Ra, Rb, Rc, Rd;
int D0, D1, D2;
|
ff4fc5ef |
while (x < w) { |
6ba04c2b |
int err, pred;
/* compute gradients */
Ra = x ? R(dst, x - stride) : R(last, x);
Rb = R(last, x);
Rc = x ? R(last, x - stride) : last2;
Rd = (x >= w - stride) ? R(last, x) : R(last, x + stride);
D0 = Rd - Rb;
D1 = Rb - Rc;
D2 = Rc - Ra;
/* run mode */ |
ff4fc5ef |
if ((FFABS(D0) <= state->near) &&
(FFABS(D1) <= state->near) &&
(FFABS(D2) <= state->near)) { |
6ba04c2b |
int r;
int RItype;
/* decode full runs while available */ |
ff4fc5ef |
while (get_bits1(&s->gb)) { |
6ba04c2b |
int r;
r = 1 << ff_log2_run[state->run_index[comp]]; |
ff4fc5ef |
if (x + r * stride > w) |
6ba04c2b |
r = (w - x) / stride; |
ff4fc5ef |
for (i = 0; i < r; i++) { |
6ba04c2b |
W(dst, x, Ra);
x += stride;
}
/* if EOL reached, we stop decoding */ |
9cacdabd |
if (r != 1 << ff_log2_run[state->run_index[comp]]) |
6ba04c2b |
return; |
ff4fc5ef |
if (state->run_index[comp] < 31) |
6ba04c2b |
state->run_index[comp]++; |
ff4fc5ef |
if (x + stride > w) |
6ba04c2b |
return;
}
/* decode aborted run */
r = ff_log2_run[state->run_index[comp]]; |
ff4fc5ef |
if (r) |
6ba04c2b |
r = get_bits_long(&s->gb, r); |
39354d60 |
if (x + r * stride > w) { |
00ab9cda |
r = (w - x) / stride;
} |
ff4fc5ef |
for (i = 0; i < r; i++) { |
6ba04c2b |
W(dst, x, Ra);
x += stride;
}
|
06e7d584 |
if (x >= w) {
av_log(NULL, AV_LOG_ERROR, "run overflow\n");
return;
}
|
6ba04c2b |
/* decode run termination value */ |
ff4fc5ef |
Rb = R(last, x); |
6ba04c2b |
RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0; |
ff4fc5ef |
err = ls_get_code_runterm(&s->gb, state, RItype,
ff_log2_run[state->run_index[comp]]);
if (state->run_index[comp]) |
6ba04c2b |
state->run_index[comp]--;
|
ff4fc5ef |
if (state->near && RItype) { |
6ba04c2b |
pred = Ra + err;
} else { |
ff4fc5ef |
if (Rb < Ra) |
6ba04c2b |
pred = Rb - err;
else
pred = Rb + err;
}
} else { /* regular mode */
int context, sign;
|
ff4fc5ef |
context = ff_jpegls_quantize(state, D0) * 81 +
ff_jpegls_quantize(state, D1) * 9 +
ff_jpegls_quantize(state, D2);
pred = mid_pred(Ra, Ra + Rb - Rc, Rb); |
6ba04c2b |
|
ff4fc5ef |
if (context < 0) { |
6ba04c2b |
context = -context; |
ff4fc5ef |
sign = 1;
} else { |
6ba04c2b |
sign = 0;
}
|
ff4fc5ef |
if (sign) { |
6ba04c2b |
pred = av_clip(pred - state->C[context], 0, state->maxval); |
ff4fc5ef |
err = -ls_get_code_regular(&s->gb, state, context); |
6ba04c2b |
} else {
pred = av_clip(pred + state->C[context], 0, state->maxval); |
ff4fc5ef |
err = ls_get_code_regular(&s->gb, state, context); |
6ba04c2b |
}
/* we have to do something more for near-lossless coding */
pred += err;
} |
ff4fc5ef |
if (state->near) {
if (pred < -state->near) |
6ba04c2b |
pred += state->range * state->twonear; |
ff4fc5ef |
else if (pred > state->maxval + state->near) |
6ba04c2b |
pred -= state->range * state->twonear;
pred = av_clip(pred, 0, state->maxval);
}
pred &= state->maxval;
W(dst, x, pred);
x += stride;
}
}
|
ff4fc5ef |
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
int point_transform, int ilv)
{ |
6ba04c2b |
int i, t = 0;
uint8_t *zero, *last, *cur;
JLSState *state; |
4a4107b4 |
int off = 0, stride = 1, width, shift, ret = 0; |
6ba04c2b |
|
2fade10c |
zero = av_mallocz(s->picture_ptr->linesize[0]); |
6ba04c2b |
last = zero; |
2fade10c |
cur = s->picture_ptr->data[0]; |
6ba04c2b |
state = av_mallocz(sizeof(JLSState));
/* initialize JPEG-LS state from JPEG parameters */ |
ff4fc5ef |
state->near = near;
state->bpp = (s->bits < 2) ? 2 : s->bits; |
6ba04c2b |
state->maxval = s->maxval; |
ff4fc5ef |
state->T1 = s->t1;
state->T2 = s->t2;
state->T3 = s->t3;
state->reset = s->reset; |
6ba04c2b |
ff_jpegls_reset_coding_parameters(state, 0);
ff_jpegls_init_state(state);
|
ff4fc5ef |
if (s->bits <= 8) |
6ba04c2b |
shift = point_transform + (8 - s->bits);
else
shift = point_transform + (16 - s->bits);
|
c39916bc |
if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
39354d60 |
av_log(s->avctx, AV_LOG_DEBUG,
"JPEG-LS params: %ix%i NEAR=%i MV=%i T(%i,%i,%i) "
"RESET=%i, LIMIT=%i, qbpp=%i, RANGE=%i\n", |
c39916bc |
s->width, s->height, state->near, state->maxval,
state->T1, state->T2, state->T3,
state->reset, state->limit, state->qbpp, state->range);
av_log(s->avctx, AV_LOG_DEBUG, "JPEG params: ILV=%i Pt=%i BPP=%i, scan = %i\n",
ilv, point_transform, s->bits, s->cur_scan);
} |
ff4fc5ef |
if (ilv == 0) { /* separate planes */ |
abad3749 |
if (s->cur_scan > s->nb_components) {
ret = AVERROR_INVALIDDATA;
goto end;
} |
6ba04c2b |
stride = (s->nb_components > 1) ? 3 : 1; |
39354d60 |
off = av_clip(s->cur_scan - 1, 0, stride - 1); |
ff4fc5ef |
width = s->width * stride;
cur += off;
for (i = 0; i < s->height; i++) {
if (s->bits <= 8) {
ls_decode_line(state, s, last, cur, t, width, stride, off, 8); |
6ba04c2b |
t = last[0]; |
ff4fc5ef |
} else { |
6ba04c2b |
ls_decode_line(state, s, last, cur, t, width, stride, off, 16); |
ff4fc5ef |
t = *((uint16_t *)last); |
6ba04c2b |
}
last = cur; |
2fade10c |
cur += s->picture_ptr->linesize[0]; |
6ba04c2b |
if (s->restart_interval && !--s->restart_count) {
align_get_bits(&s->gb);
skip_bits(&s->gb, 16); /* skip RSTn */
}
} |
ff4fc5ef |
} else if (ilv == 1) { /* line interleaving */ |
6ba04c2b |
int j; |
ff4fc5ef |
int Rc[3] = { 0, 0, 0 }; |
2d6f317d |
stride = (s->nb_components > 1) ? 3 : 1; |
2fade10c |
memset(cur, 0, s->picture_ptr->linesize[0]); |
2d6f317d |
width = s->width * stride; |
ff4fc5ef |
for (i = 0; i < s->height; i++) { |
39354d60 |
for (j = 0; j < stride; j++) { |
ff4fc5ef |
ls_decode_line(state, s, last + j, cur + j, |
39354d60 |
Rc[j], width, stride, j, 8); |
6ba04c2b |
Rc[j] = last[j];
if (s->restart_interval && !--s->restart_count) {
align_get_bits(&s->gb);
skip_bits(&s->gb, 16); /* skip RSTn */
}
}
last = cur; |
2fade10c |
cur += s->picture_ptr->linesize[0]; |
6ba04c2b |
} |
ff4fc5ef |
} else if (ilv == 2) { /* sample interleaving */ |
a5a0ef5e |
avpriv_report_missing_feature(s->avctx, "Sample interleaved images"); |
4a4107b4 |
ret = AVERROR_PATCHWELCOME;
goto end; |
6ba04c2b |
}
|
8024b488 |
if (s->xfrm && s->nb_components == 3) {
int x, w;
w = s->width * s->nb_components;
if (s->bits <= 8) { |
2fade10c |
uint8_t *src = s->picture_ptr->data[0]; |
8024b488 |
for (i = 0; i < s->height; i++) {
switch(s->xfrm) {
case 1:
for (x = off; x < w; x += 3) {
src[x ] += src[x+1] + 128;
src[x+2] += src[x+1] + 128;
}
break;
case 2:
for (x = off; x < w; x += 3) {
src[x ] += src[x+1] + 128;
src[x+2] += ((src[x ] + src[x+1])>>1) + 128;
}
break;
case 3:
for (x = off; x < w; x += 3) {
int g = src[x+0] - ((src[x+2]+src[x+1])>>2) + 64;
src[x+0] = src[x+2] + g + 128;
src[x+2] = src[x+1] + g + 128;
src[x+1] = g;
}
break; |
8aea97a4 |
case 4:
for (x = off; x < w; x += 3) {
int r = src[x+0] - (( 359 * (src[x+2]-128) + 490) >> 8);
int g = src[x+0] - (( 88 * (src[x+1]-128) - 183 * (src[x+2]-128) + 30) >> 8);
int b = src[x+0] + ((454 * (src[x+1]-128) + 574) >> 8);
src[x+0] = av_clip_uint8(r);
src[x+1] = av_clip_uint8(g);
src[x+2] = av_clip_uint8(b);
}
break; |
8024b488 |
} |
2fade10c |
src += s->picture_ptr->linesize[0]; |
8024b488 |
}
}else
avpriv_report_missing_feature(s->avctx, "16bit xfrm");
}
|
ff4fc5ef |
if (shift) { /* we need to do point transform or normalize samples */ |
6ba04c2b |
int x, w;
w = s->width * s->nb_components;
|
ff4fc5ef |
if (s->bits <= 8) { |
2fade10c |
uint8_t *src = s->picture_ptr->data[0]; |
6ba04c2b |
|
ff4fc5ef |
for (i = 0; i < s->height; i++) {
for (x = off; x < w; x += stride) |
6ba04c2b |
src[x] <<= shift; |
2fade10c |
src += s->picture_ptr->linesize[0]; |
6ba04c2b |
} |
ff4fc5ef |
} else { |
2fade10c |
uint16_t *src = (uint16_t *)s->picture_ptr->data[0]; |
6ba04c2b |
|
ff4fc5ef |
for (i = 0; i < s->height; i++) {
for (x = 0; x < w; x++) |
6ba04c2b |
src[x] <<= shift; |
2fade10c |
src += s->picture_ptr->linesize[0] / 2; |
6ba04c2b |
}
}
} |
4a4107b4 |
end: |
6ba04c2b |
av_free(state);
av_free(zero);
|
4a4107b4 |
return ret; |
6ba04c2b |
} |
5acd8d9e |
|
e7e2df27 |
AVCodec ff_jpegls_decoder = { |
ec6402b7 |
.name = "jpegls", |
ff4fc5ef |
.long_name = NULL_IF_CONFIG_SMALL("JPEG-LS"), |
ec6402b7 |
.type = AVMEDIA_TYPE_VIDEO, |
36ef5369 |
.id = AV_CODEC_ID_JPEGLS, |
ec6402b7 |
.priv_data_size = sizeof(MJpegDecodeContext),
.init = ff_mjpeg_decode_init,
.close = ff_mjpeg_decode_end,
.decode = ff_mjpeg_decode_frame,
.capabilities = CODEC_CAP_DR1, |
5acd8d9e |
}; |