diff options
Diffstat (limited to 'libavcodec/jpeglsdec.c')
| -rw-r--r-- | libavcodec/jpeglsdec.c | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c index a4cfe4f..74714e0 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 @@ -198,6 +198,9 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void * 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; @@ -262,9 +265,9 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor JLSState *state; int off = 0, stride = 1, width, shift; - zero = av_mallocz(s->picture_ptr->linesize[0]); + zero = av_mallocz(s->picture.linesize[0]); last = zero; - cur = s->picture_ptr->data[0]; + cur = s->picture.data[0]; state = av_mallocz(sizeof(JLSState)); /* initialize JPEG-LS state from JPEG parameters */ @@ -286,8 +289,8 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor // 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 */ - off = s->cur_scan - 1; stride = (s->nb_components > 1) ? 3 : 1; + off = av_clip(s->cur_scan - 1, 0, stride); width = s->width * stride; cur += off; for(i = 0; i < s->height; i++) { @@ -299,7 +302,7 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor t = *((uint16_t*)last); } last = cur; - cur += s->picture_ptr->linesize[0]; + cur += s->picture.linesize[0]; if (s->restart_interval && !--s->restart_count) { align_get_bits(&s->gb); @@ -309,11 +312,12 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor } else if(ilv == 1) { /* line interleaving */ int j; int Rc[3] = {0, 0, 0}; - memset(cur, 0, s->picture_ptr->linesize[0]); - width = s->width * 3; + stride = (s->nb_components > 1) ? 3 : 1; + memset(cur, 0, s->picture.linesize[0]); + width = s->width * stride; for(i = 0; i < s->height; i++) { - for(j = 0; j < 3; j++) { - ls_decode_line(state, s, last + j, cur + j, Rc[j], width, 3, j, 8); + for(j = 0; j < stride; j++) { + ls_decode_line(state, s, last + j, cur + j, Rc[j], width, stride, j, 8); Rc[j] = last[j]; if (s->restart_interval && !--s->restart_count) { @@ -322,7 +326,7 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor } } last = cur; - cur += s->picture_ptr->linesize[0]; + cur += s->picture.linesize[0]; } } else if(ilv == 2) { /* sample interleaving */ av_log(s->avctx, AV_LOG_ERROR, "Sample interleaved images are not supported.\n"); @@ -337,22 +341,22 @@ int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transfor w = s->width * s->nb_components; if(s->bits <= 8){ - uint8_t *src = s->picture_ptr->data[0]; + uint8_t *src = s->picture.data[0]; for(i = 0; i < s->height; i++){ for(x = off; x < w; x+= stride){ src[x] <<= shift; } - src += s->picture_ptr->linesize[0]; + src += s->picture.linesize[0]; } }else{ - uint16_t *src = (uint16_t*) s->picture_ptr->data[0]; + uint16_t *src = (uint16_t*) s->picture.data[0]; for(i = 0; i < s->height; i++){ for(x = 0; x < w; x++){ src[x] <<= shift; } - src += s->picture_ptr->linesize[0]/2; + src += s->picture.linesize[0]/2; } } } |
