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Diffstat (limited to 'libavcodec/vmdaudio.c')
-rw-r--r--libavcodec/vmdaudio.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c
index 9e02ba7633..e8c8a064c7 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);