diff options
Diffstat (limited to 'libavcodec/motionpixels.c')
| -rw-r--r-- | libavcodec/motionpixels.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/libavcodec/motionpixels.c b/libavcodec/motionpixels.c index c2bd0f4..61a718c 100644 --- a/libavcodec/motionpixels.c +++ b/libavcodec/motionpixels.c @@ -2,20 +2,20 @@ * Motion Pixels Video Decoder * Copyright (c) 2008 Gregory Montoir (cyx@users.sourceforge.net) * - * 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 */ @@ -55,6 +55,11 @@ static av_cold int mp_decode_init(AVCodecContext *avctx) int w4 = (avctx->width + 3) & ~3; int h4 = (avctx->height + 3) & ~3; + if(avctx->extradata_size < 2){ + av_log(avctx, AV_LOG_ERROR, "extradata too small\n"); + return AVERROR_INVALIDDATA; + } + motionpixels_tableinit(); mp->avctx = avctx; ff_dsputil_init(&mp->dsp, avctx); @@ -63,6 +68,7 @@ static av_cold int mp_decode_init(AVCodecContext *avctx) mp->vpt = av_mallocz(avctx->height * sizeof(YuvPixel)); mp->hpt = av_mallocz(h4 * w4 / 16 * sizeof(YuvPixel)); avctx->pix_fmt = AV_PIX_FMT_RGB555; + avcodec_get_frame_defaults(&mp->frame); return 0; } @@ -214,6 +220,8 @@ static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb) YuvPixel p; int y, y0; + av_assert1(mp->changes_map[0]); + for (y = 0; y < mp->avctx->height; ++y) { if (mp->changes_map[y * mp->avctx->width] != 0) { memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale)); @@ -244,13 +252,13 @@ static int mp_decode_frame(AVCodecContext *avctx, int buf_size = avpkt->size; MotionPixelsContext *mp = avctx->priv_data; GetBitContext gb; - int i, count1, count2, sz; + int i, count1, count2, sz, ret; - mp->frame.reference = 1; + mp->frame.reference = 3; mp->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE; - if (avctx->reget_buffer(avctx, &mp->frame)) { + if ((ret = avctx->reget_buffer(avctx, &mp->frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); - return -1; + return ret; } /* le32 bitstream msb first */ |
