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ffmpeg/libavcodec/jpeglsdec.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* 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
*/
/**
* @file
* JPEG-LS decoder.
*/
#include "libavutil/mem.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "golomb.h"
#include "mathops.h"
#include "mjpegdec.h"
#include "jpegls.h"
#include "jpeglsdec.h"
/*
* 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
* avoid situation of 32 zeros, FFmpeg Golomb decoder is painfully slow
* on this errors.
*/
//#define JLS_BROKEN
/**
* Decode LSE block with initialization parameters
*/
int ff_jpegls_decode_lse(MJpegDecodeContext *s)
{
int id;
int tid, wt, maxtab, i, j;
int len = get_bits(&s->gb, 16);
id = get_bits(&s->gb, 8);
switch (id) {
case 1:
if (len < 13)
return AVERROR_INVALIDDATA;
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);
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);
}
// ff_jpegls_reset_coding_parameters(s, 0);
//FIXME quant table?
break;
case 2:
s->palette_index = 0;
case 3:
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;
}
if (!s->maxval)
maxtab = 255;
else if ((5 + wt*(s->maxval+1)) < 65535)
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)) {
uint32_t *pal = (uint32_t *)s->picture_ptr->data[1];
int shift = 0;
if (s->avctx->bits_per_raw_sample > 0 && s->avctx->bits_per_raw_sample < 8) {
maxtab = FFMIN(maxtab, (1<<s->avctx->bits_per_raw_sample)-1);
shift = 8 - s->avctx->bits_per_raw_sample;
}
s->force_pal8++;
if (!pal) {
if (s->force_pal8 > 1)
return AVERROR_INVALIDDATA;
return 1;
}
for (i=s->palette_index; i<=maxtab; i++) {
uint8_t k = i << shift;
pal[k] = wt < 4 ? 0xFF000000 : 0;
for (j=0; j<wt; j++) {
pal[k] |= get_bits(&s->gb, 8) << (8*(wt-j-1));
}
}
s->palette_index = i;
}
break;
case 4:
avpriv_request_sample(s->avctx, "oversize image");
return AVERROR(ENOSYS);
default:
av_log(s->avctx, AV_LOG_ERROR, "invalid id %d\n", id);
return AVERROR_INVALIDDATA;
}
ff_dlog(s->avctx, "ID=%i, T=%i,%i,%i\n", id, s->t1, s->t2, s->t3);
return 0;
}
/**
* Get context-dependent Golomb code, decode it and update context
*/
static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
{
int k, ret;
for (k = 0; ((unsigned)state->N[Q] << k) < state->A[Q]; k++)
;
#ifdef JLS_BROKEN
if (!show_bits_long(gb, 32))
return -1;
#endif
ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);
/* decode mapped error */
if (ret & 1)
ret = -(ret + 1 >> 1);
else
ret >>= 1;
/* for NEAR=0, k=0 and 2*B[Q] <= - N[Q] mapping is reversed */
if (!state->near && !k && (2 * state->B[Q] <= -state->N[Q]))
ret = -(ret + 1);
ret = ff_jpegls_update_state_regular(state, Q, ret);
return ret;
}
/**
* Get Golomb code, decode it and update state for run termination
*/
static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state,
int RItype, int limit_add)
{
int k, ret, temp, map;
int Q = 365 + RItype;
temp = state->A[Q];
if (RItype)
temp += state->N[Q] >> 1;
for (k = 0; ((unsigned)state->N[Q] << k) < temp; k++)
;
#ifdef JLS_BROKEN
if (!show_bits_long(gb, 32))
return -1;
#endif
ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1,
state->qbpp);
if (ret < 0)
return -0x10000;
/* decode mapped error */
map = 0;
if (!k && (RItype || ret) && (2 * state->B[Q] < state->N[Q]))
map = 1;
ret += RItype + map;
if (ret & 1) {
ret = map - (ret + 1 >> 1);
state->B[Q]++;
} else {
ret = ret >> 1;
}
if (FFABS(ret) > 0xFFFF)
return -0x10000;
/* update state */
state->A[Q] += FFABS(ret) - RItype;
ret *= state->twonear;
ff_jpegls_downscale_state(state, Q);
return ret;
}
/**
* Decode one line of image
*/
static inline int ls_decode_line(JLSState *state, MJpegDecodeContext *s,
void *last, void *dst, int last2, int w,
int stride, int comp, int bits)
{
int i, x = 0;
int Ra, Rb, Rc, Rd;
int D0, D1, D2;
while (x < w) {
int err, pred;
if (get_bits_left(&s->gb) <= 0)
return AVERROR_INVALIDDATA;
/* 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 */
if ((FFABS(D0) <= state->near) &&
(FFABS(D1) <= state->near) &&
(FFABS(D2) <= state->near)) {
int r;
int RItype;
/* decode full runs while available */
while (get_bits1(&s->gb)) {
int r;
r = 1 << ff_log2_run[state->run_index[comp]];
if (x + r * stride > w)
r = (w - x) / stride;
for (i = 0; i < r; i++) {
W(dst, x, Ra);
x += stride;
}
/* if EOL reached, we stop decoding */
if (r != 1 << ff_log2_run[state->run_index[comp]])
return 0;
if (state->run_index[comp] < 31)
state->run_index[comp]++;
if (x + stride > w)
return 0;
}
/* decode aborted run */
r = ff_log2_run[state->run_index[comp]];
if (r)
r = get_bits(&s->gb, r);
if (x + r * stride > w) {
r = (w - x) / stride;
}
for (i = 0; i < r; i++) {
W(dst, x, Ra);
x += stride;
}
if (x >= w) {
av_log(NULL, AV_LOG_ERROR, "run overflow\n");
av_assert0(x <= w);
return AVERROR_INVALIDDATA;
}
/* decode run termination value */
Rb = R(last, x);
RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
err = ls_get_code_runterm(&s->gb, state, RItype,
ff_log2_run[state->run_index[comp]]);
if (state->run_index[comp])
state->run_index[comp]--;
if (state->near && RItype) {
pred = Ra + err;
} else {
if (Rb < Ra)
pred = Rb - err;
else
pred = Rb + err;
}
} else { /* regular mode */
int context, sign;
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);
if (context < 0) {
context = -context;
sign = 1;
} else {
sign = 0;
}
if (sign) {
pred = av_clip(pred - state->C[context], 0, state->maxval);
err = -ls_get_code_regular(&s->gb, state, context);
} else {
pred = av_clip(pred + state->C[context], 0, state->maxval);
err = ls_get_code_regular(&s->gb, state, context);
}
/* we have to do something more for near-lossless coding */
pred += err;
}
if (state->near) {
if (pred < -state->near)
pred += state->range * state->twonear;
else if (pred > state->maxval + state->near)
pred -= state->range * state->twonear;
pred = av_clip(pred, 0, state->maxval);
}
pred &= state->maxval;
W(dst, x, pred);
x += stride;
}
return 0;
}
int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
int point_transform, int ilv)
{
int i, t = 0;
uint8_t *zero, *last, *cur;
JLSState *state = s->jls_state;
int off = 0, stride = 1, width, shift, ret = 0;
int decoded_height = 0;
if (!state) {
state = av_malloc(sizeof(*state));
if (!state)
return AVERROR(ENOMEM);
s->jls_state = state;
}
zero = av_mallocz(s->picture_ptr->linesize[0]);
if (!zero)
return AVERROR(ENOMEM);
last = zero;
cur = s->picture_ptr->data[0];
/* initialize JPEG-LS state from JPEG parameters */
memset(state, 0, sizeof(*state));
state->near = near;
state->bpp = (s->bits < 2) ? 2 : s->bits;
state->maxval = s->maxval;
state->T1 = s->t1;
state->T2 = s->t2;
state->T3 = s->t3;
state->reset = s->reset;
ff_jpegls_reset_coding_parameters(state, 0);
/* Testing parameters here, we cannot test in LSE or SOF because
* these interdepend and are allowed in either order
*/
if (state->maxval >= (1<<state->bpp) ||
state->T1 > state->T2 ||
state->T2 > state->T3 ||
state->T3 > state->maxval ||
state->reset > FFMAX(255, state->maxval)) {
ret = AVERROR_INVALIDDATA;
goto end;
}
ff_jpegls_init_state(state);
if (s->bits <= 8)
shift = point_transform + (8 - s->bits);
else
shift = point_transform + (16 - s->bits);
if (shift >= 16) {
ret = AVERROR_INVALIDDATA;
goto end;
}
if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
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",
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);
}
if (get_bits_left(&s->gb) < s->height) {
ret = AVERROR_INVALIDDATA;
goto end;
}
if (ilv == 0) { /* separate planes */
if (s->cur_scan > s->nb_components) {
ret = AVERROR_INVALIDDATA;
goto end;
}
stride = (s->nb_components > 1) ? 3 : 1;
off = av_clip(s->cur_scan - 1, 0, stride - 1);
width = s->width * stride;
cur += off;
for (i = 0; i < s->height; i++) {
int ret;
if (s->bits <= 8) {
ret = ls_decode_line(state, s, last, cur, t, width, stride, off, 8);
t = last[0];
} else {
ret = ls_decode_line(state, s, last, cur, t, width, stride, off, 16);
t = *((uint16_t *)last);
}
if (ret < 0)
break;
last = cur;
cur += s->picture_ptr->linesize[0];
if (s->restart_interval && !--s->restart_count) {
align_get_bits(&s->gb);
skip_bits(&s->gb, 16); /* skip RSTn */
}
}
decoded_height = i;
} else if (ilv == 1) { /* line interleaving */
int j;
int Rc[3] = { 0, 0, 0 };
stride = (s->nb_components > 1) ? 3 : 1;
memset(cur, 0, s->picture_ptr->linesize[0]);
width = s->width * stride;
for (i = 0; i < s->height; i++) {
int ret;
for (j = 0; j < stride; j++) {
ret = ls_decode_line(state, s, last + j, cur + j,
Rc[j], width, stride, j, 8);
if (ret < 0)
break;
Rc[j] = last[j];
if (s->restart_interval && !--s->restart_count) {
align_get_bits(&s->gb);
skip_bits(&s->gb, 16); /* skip RSTn */
}
}
if (ret < 0)
break;
last = cur;
cur += s->picture_ptr->linesize[0];
}
decoded_height = i;
} else if (ilv == 2) { /* sample interleaving */
avpriv_report_missing_feature(s->avctx, "Sample interleaved images");
ret = AVERROR_PATCHWELCOME;
goto end;
} else { /* unknown interleaving */
avpriv_report_missing_feature(s->avctx, "Unknown interleaved images");
ret = AVERROR_PATCHWELCOME;
goto end;
}
if (s->xfrm && s->nb_components == 3) {
int x, w;
w = s->width * s->nb_components;
if (s->bits <= 8) {
uint8_t *src = s->picture_ptr->data[0];
for (i = 0; i < s->height; i++) {
switch(s->xfrm) {
case 1:
for (x = off; x + 2 < w; x += 3) {
src[x ] += src[x+1] + 128;
src[x+2] += src[x+1] + 128;
}
break;
case 2:
for (x = off; x + 2 < 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 + 2 < 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;
case 4:
for (x = off; x + 2 < 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;
}
src += s->picture_ptr->linesize[0];
}
}else
avpriv_report_missing_feature(s->avctx, "16bit xfrm");
}
if (shift) { /* we need to do point transform or normalize samples */
int x, w;
w = s->width * s->nb_components;
if (s->bits <= 8) {
uint8_t *src = s->picture_ptr->data[0];
for (i = 0; i < decoded_height; i++) {
for (x = off; x < w; x += stride)
src[x] <<= shift;
src += s->picture_ptr->linesize[0];
}
} else {
uint16_t *src = (uint16_t *)s->picture_ptr->data[0];
for (i = 0; i < decoded_height; i++) {
for (x = 0; x < w; x++)
src[x] <<= shift;
src += s->picture_ptr->linesize[0] / 2;
}
}
}
end:
av_free(zero);
return ret;
}
const FFCodec ff_jpegls_decoder = {
.p.name = "jpegls",
CODEC_LONG_NAME("JPEG-LS"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_JPEGLS,
.priv_data_size = sizeof(MJpegDecodeContext),
.init = ff_mjpeg_decode_init,
.close = ff_mjpeg_decode_end,
FF_CODEC_DECODE_CB(ff_mjpeg_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
};
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