diff options
Diffstat (limited to 'libavcodec/qtrle.c')
| -rw-r--r-- | libavcodec/qtrle.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/libavcodec/qtrle.c b/libavcodec/qtrle.c index 8854fb2..43aea13 100644 --- a/libavcodec/qtrle.c +++ b/libavcodec/qtrle.c @@ -2,20 +2,20 @@ * Quicktime Animation (RLE) Video Decoder * Copyright (C) 2004 the ffmpeg project * - * 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 */ @@ -127,6 +127,7 @@ static inline void qtrle_decode_2n4bpp(QtrleContext *s, int stream_ptr, while (lines_to_change--) { CHECK_STREAM_PTR(2); pixel_ptr = row_ptr + (num_pixels * (s->buf[stream_ptr++] - 1)); + CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */ while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) { if (rle_code == 0) { @@ -183,6 +184,7 @@ static void qtrle_decode_8bpp(QtrleContext *s, int stream_ptr, int row_ptr, int while (lines_to_change--) { CHECK_STREAM_PTR(2); pixel_ptr = row_ptr + (4 * (s->buf[stream_ptr++] - 1)); + CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */ while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) { if (rle_code == 0) { @@ -236,6 +238,7 @@ static void qtrle_decode_16bpp(QtrleContext *s, int stream_ptr, int row_ptr, int while (lines_to_change--) { CHECK_STREAM_PTR(2); pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 2; + CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */ while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) { if (rle_code == 0) { @@ -285,6 +288,7 @@ static void qtrle_decode_24bpp(QtrleContext *s, int stream_ptr, int row_ptr, int while (lines_to_change--) { CHECK_STREAM_PTR(2); pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 3; + CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */ while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) { if (rle_code == 0) { @@ -336,6 +340,7 @@ static void qtrle_decode_32bpp(QtrleContext *s, int stream_ptr, int row_ptr, int while (lines_to_change--) { CHECK_STREAM_PTR(2); pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 4; + CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */ while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) { if (rle_code == 0) { @@ -417,6 +422,7 @@ static av_cold int qtrle_decode_init(AVCodecContext *avctx) break; } + avcodec_get_frame_defaults(&s->frame); s->frame.data[0] = NULL; return 0; @@ -463,6 +469,8 @@ static int qtrle_decode_frame(AVCodecContext *avctx, stream_ptr += 4; height = AV_RB16(&s->buf[stream_ptr]); stream_ptr += 4; + if (height > s->avctx->height - start_line) + goto done; } else { start_line = 0; height = s->avctx->height; |
