diff options
Diffstat (limited to 'libavcodec/lcldec.c')
| -rw-r--r-- | libavcodec/lcldec.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/libavcodec/lcldec.c b/libavcodec/lcldec.c index 914d4b2..f8d45da 100644 --- a/libavcodec/lcldec.c +++ b/libavcodec/lcldec.c @@ -2,20 +2,20 @@ * LCL (LossLess Codec Library) Codec * Copyright (c) 2002-2004 Roberto Togni * - * 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 */ @@ -97,7 +97,13 @@ static unsigned int mszh_decomp(const unsigned char * srcptr, int srclen, unsign ofs = FFMIN(ofs, destptr - destptr_bak); cnt *= 4; cnt = FFMIN(cnt, destptr_end - destptr); - av_memcpy_backptr(destptr, ofs, cnt); + if (ofs) { + av_memcpy_backptr(destptr, ofs, cnt); + } else { + // Not known what the correct behaviour is, but + // this at least avoids uninitialized data. + memset(destptr, 0, cnt); + } destptr += cnt; } maskbit >>= 1; @@ -134,7 +140,7 @@ static int zlib_decomp(AVCodecContext *avctx, const uint8_t *src, int src_len, i av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); return AVERROR_UNKNOWN; } - c->zstream.next_in = src; + c->zstream.next_in = (uint8_t *)src; c->zstream.avail_in = src_len; c->zstream.next_out = c->decomp_buf + offset; c->zstream.avail_out = c->decomp_size - offset; @@ -193,8 +199,14 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac case AV_CODEC_ID_MSZH: switch (c->compression) { case COMP_MSZH: - if (c->flags & FLAG_MULTITHREAD) { + if (c->imgtype == IMGTYPE_RGB24 && len == width * height * 3) { + ; + } else if (c->flags & FLAG_MULTITHREAD) { mthread_inlen = AV_RL32(encoded); + if (len < 8) { + av_log(avctx, AV_LOG_ERROR, "len %d is too small\n", len); + return AVERROR_INVALIDDATA; + } mthread_inlen = FFMIN(mthread_inlen, len - 8); mthread_outlen = AV_RL32(encoded+4); mthread_outlen = FFMIN(mthread_outlen, c->decomp_size); @@ -480,6 +492,7 @@ static av_cold int decode_init(AVCodecContext *avctx) FFALIGN(avctx->height, 4); unsigned int max_decomp_size; + avcodec_get_frame_defaults(&c->pic); if (avctx->extradata_size < 8) { av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n"); return AVERROR_INVALIDDATA; |
