summaryrefslogtreecommitdiff
path: root/libavcodec/jpeglsdec.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavcodec/jpeglsdec.c')
-rw-r--r--libavcodec/jpeglsdec.c163
1 files changed, 142 insertions, 21 deletions
diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c
index 3b93799f85..2ea75f7543 100644
--- a/libavcodec/jpeglsdec.c
+++ b/libavcodec/jpeglsdec.c
@@ -3,20 +3,20 @@
* Copyright (c) 2003 Michael Niedermayer
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -40,7 +40,7 @@
* (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, Libav Golomb decoder is painfully slow
+ * avoid situation of 32 zeros, FFmpeg Golomb decoder is painfully slow
* on this errors.
*/
//#define JLS_BROKEN
@@ -51,27 +51,87 @@
int ff_jpegls_decode_lse(MJpegDecodeContext *s)
{
int id;
+ int tid, wt, maxtab, i, j;
- skip_bits(&s->gb, 16); /* length: FIXME: verify field validity */
+ 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:
- av_log(s->avctx, AV_LOG_ERROR, "palette not supported\n");
- return AVERROR(ENOSYS);
+ 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->picture_ptr->format =
+ s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
+ for (i=s->palette_index; i<=maxtab; i++) {
+ uint8_t k = i << shift;
+ pal[k] = 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:
- av_log(s->avctx, AV_LOG_ERROR, "oversize image not supported\n");
+ avpriv_request_sample(s->avctx, "oversize image");
return AVERROR(ENOSYS);
default:
av_log(s->avctx, AV_LOG_ERROR, "invalid id %d\n", id);
@@ -149,6 +209,8 @@ static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state,
ret = ret >> 1;
}
+ if(FFABS(ret) > 0xFFFF)
+ return -0x10000;
/* update state */
state->A[Q] += FFABS(ret) - RItype;
ret *= state->twonear;
@@ -208,11 +270,20 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s,
r = ff_log2_run[state->run_index[comp]];
if (r)
r = get_bits_long(&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;
+ }
+
/* decode run termination value */
Rb = R(last, x);
RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
@@ -304,21 +375,23 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
else
shift = point_transform + (16 - s->bits);
- ff_dlog(s->avctx,
- "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);
- ff_dlog(s->avctx, "JPEG params: ILV=%i Pt=%i BPP=%i, scan = %i\n",
- ilv, point_transform, s->bits, s->cur_scan);
+ 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 (ilv == 0) { /* separate planes */
if (s->cur_scan > s->nb_components) {
ret = AVERROR_INVALIDDATA;
goto end;
}
- off = s->cur_scan - 1;
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++) {
@@ -340,12 +413,13 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
} 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 * 3;
+ width = s->width * stride;
for (i = 0; i < s->height; i++) {
- for (j = 0; j < 3; j++) {
+ for (j = 0; j < stride; j++) {
ls_decode_line(state, s, last + j, cur + j,
- Rc[j], width, 3, j, 8);
+ Rc[j], width, stride, j, 8);
Rc[j] = last[j];
if (s->restart_interval && !--s->restart_count) {
@@ -362,6 +436,53 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near,
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 < 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;
+ 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;
+ }
+ 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;
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 18:45:56 +0000