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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-05-30 10:23:50 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-05-30 10:36:52 +0200 |
| commit | 103ffde5a3914c33a34a951a3f4086801dbe4938 (patch) | |
| tree | ba8e42bdcb2044d80409f0964d7752119bb97966 | |
| parent | ab78e21ea285309b3d0a997a06cf993ff45b9fdc (diff) | |
| parent | 701966730ce10290fd49c5ccedd73f505680f764 (diff) | |
| download | ffmpeg-103ffde5a3914c33a34a951a3f4086801dbe4938.tar.gz | |
Merge commit '701966730ce10290fd49c5ccedd73f505680f764'
* commit '701966730ce10290fd49c5ccedd73f505680f764':
vmd: drop incomplete chunks and spurious samples
Conflicts:
libavcodec/vmdav.c
2 of the changes are replaced by assert0s, as they should
be impossible.
The actual bug is likely caused by a invalid block_align
which is checked for and thus impossible in ffmpeg.
Merged-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/vmdav.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/vmdav.c b/libavcodec/vmdav.c index ac2180cf05..40c1fd27e8 100644 --- a/libavcodec/vmdav.c +++ b/libavcodec/vmdav.c @@ -43,6 +43,7 @@ #include <stdlib.h> #include <string.h> +#include "libavutil/avassert.h" #include "libavutil/channel_layout.h" #include "libavutil/common.h" #include "libavutil/intreadwrite.h" @@ -588,6 +589,9 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* ensure output buffer is large enough */ audio_chunks = buf_size / s->chunk_size; + /* drop incomplete chunks */ + buf_size = audio_chunks * s->chunk_size; + /* get output buffer */ frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) / avctx->channels; @@ -599,6 +603,8 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* decode silent chunks */ if (silent_chunks > 0) { 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; @@ -611,6 +617,7 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* decode audio chunks */ if (audio_chunks > 0) { 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, |