diff options
Diffstat (limited to 'libavcodec/vmdaudio.c')
| -rw-r--r-- | libavcodec/vmdaudio.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c index 66c5865..3be0ff8 100644 --- a/libavcodec/vmdaudio.c +++ b/libavcodec/vmdaudio.c @@ -1,20 +1,21 @@ /* * Sierra VMD audio 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 */ @@ -34,6 +35,7 @@ #include <string.h> +#include "libavutil/avassert.h" #include "libavutil/channel_layout.h" #include "libavutil/common.h" #include "libavutil/intreadwrite.h" @@ -74,7 +76,7 @@ static av_cold int vmdaudio_decode_init(AVCodecContext *avctx) av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n"); return AVERROR(EINVAL); } - if (avctx->block_align < 1) { + if (avctx->block_align < 1 || avctx->block_align % avctx->channels) { av_log(avctx, AV_LOG_ERROR, "invalid block align\n"); return AVERROR(EINVAL); } @@ -180,17 +182,16 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* get output buffer */ frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) / avctx->channels; - if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) return ret; - } output_samples_u8 = frame->data[0]; output_samples_s16 = (int16_t *)frame->data[0]; /* decode silent chunks */ if (silent_chunks > 0) { - int silent_size = FFMIN(avctx->block_align * silent_chunks, - frame->nb_samples * avctx->channels); + int silent_size = avctx->block_align * silent_chunks; + av_assert0(avctx->block_align * silent_chunks <= frame->nb_samples * avctx->channels); + if (s->out_bps == 2) { memset(output_samples_s16, 0x00, silent_size * 2); output_samples_s16 += silent_size; @@ -202,8 +203,9 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* decode audio chunks */ if (audio_chunks > 0) { - buf_end = buf + (buf_size & ~(avctx->channels > 1)); - while (buf + s->chunk_size <= buf_end) { + buf_end = buf + buf_size; + av_assert0((buf_size & (avctx->channels > 1)) == 0); + while (buf_end - buf >= s->chunk_size) { if (s->out_bps == 2) { decode_audio_s16(output_samples_s16, buf, s->chunk_size, avctx->channels); |
