diff options
Diffstat (limited to 'libavcodec/eatgq.c')
| -rw-r--r-- | libavcodec/eatgq.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/libavcodec/eatgq.c b/libavcodec/eatgq.c index a020c52..524798b 100644 --- a/libavcodec/eatgq.c +++ b/libavcodec/eatgq.c @@ -2,20 +2,20 @@ * Electronic Arts TGQ Video Decoder * Copyright (c) 2007-2008 Peter Ross <pross@xvid.org> * - * 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -148,7 +148,7 @@ static void tgq_idct_put_mb_dconly(TgqContext *s, int mb_x, int mb_y, const int8 } } -static void tgq_decode_mb(TgqContext *s, int mb_y, int mb_x) +static int tgq_decode_mb(TgqContext *s, int mb_y, int mb_x) { int mode; int i; @@ -157,7 +157,7 @@ static void tgq_decode_mb(TgqContext *s, int mb_y, int mb_x) mode = bytestream2_get_byte(&s->gb); if (mode > 12) { GetBitContext gb; - init_get_bits(&gb, s->gb.buffer, FFMIN(s->gb.buffer_end - s->gb.buffer, mode) * 8); + init_get_bits(&gb, s->gb.buffer, FFMIN(bytestream2_get_bytes_left(&s->gb), mode) * 8); for (i = 0; i < 6; i++) tgq_decode_block(s, s->block[i], &gb); tgq_idct_put_mb(s, s->block, mb_x, mb_y); @@ -176,9 +176,11 @@ static void tgq_decode_mb(TgqContext *s, int mb_y, int mb_x) } } else { av_log(s->avctx, AV_LOG_ERROR, "unsupported mb mode %i\n", mode); + return -1; } tgq_idct_put_mb_dconly(s, mb_x, mb_y, dc); } + return 0; } static void tgq_calculate_qtable(TgqContext *s, int quant) @@ -200,12 +202,13 @@ static int tgq_decode_frame(AVCodecContext *avctx, int buf_size = avpkt->size; TgqContext *s = avctx->priv_data; int x, y, ret; - int big_endian = AV_RL32(&buf[4]) > 0x000FFFFF; + int big_endian; if (buf_size < 16) { av_log(avctx, AV_LOG_WARNING, "truncated header\n"); return AVERROR_INVALIDDATA; } + big_endian = AV_RL32(&buf[4]) > 0x000FFFFF; bytestream2_init(&s->gb, buf + 8, buf_size - 8); if (big_endian) { s->width = bytestream2_get_be16u(&s->gb); @@ -235,7 +238,8 @@ static int tgq_decode_frame(AVCodecContext *avctx, for (y = 0; y < FFALIGN(avctx->height, 16) >> 4; y++) for (x = 0; x < FFALIGN(avctx->width, 16) >> 4; x++) - tgq_decode_mb(s, y, x); + if (tgq_decode_mb(s, y, x) < 0) + return AVERROR_INVALIDDATA; *got_frame = 1; *(AVFrame*)data = s->frame; |
