diff options
Diffstat (limited to 'libavcodec/msvideo1.c')
-rw-r--r-- | libavcodec/msvideo1.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/libavcodec/msvideo1.c b/libavcodec/msvideo1.c index 37ea32d..29700f5 100644 --- a/libavcodec/msvideo1.c +++ b/libavcodec/msvideo1.c @@ -2,20 +2,20 @@ * Microsoft Video-1 Decoder * Copyright (C) 2003 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 */ @@ -66,6 +66,8 @@ static av_cold int msvideo1_decode_init(AVCodecContext *avctx) if (s->avctx->bits_per_coded_sample == 8) { s->mode_8bit = 1; avctx->pix_fmt = AV_PIX_FMT_PAL8; + if (avctx->extradata_size >= AVPALETTE_SIZE) + memcpy(s->pal, avctx->extradata, AVPALETTE_SIZE); } else { s->mode_8bit = 0; avctx->pix_fmt = AV_PIX_FMT_RGB555; @@ -299,17 +301,24 @@ static int msvideo1_decode_frame(AVCodecContext *avctx, s->buf = buf; s->size = buf_size; - if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) { - av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return ret; + // Discard frame if its smaller than the minimum frame size + if (buf_size < (avctx->width/4) * (avctx->height/4) / 512) { + av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); + return AVERROR_INVALIDDATA; } + if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) + return ret; + if (s->mode_8bit) { - const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); + int size; + const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size); - if (pal) { + if (pal && size == AVPALETTE_SIZE) { memcpy(s->pal, pal, AVPALETTE_SIZE); s->frame->palette_has_changed = 1; + } else if (pal) { + av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size); } } |