diff options
Diffstat (limited to 'libavcodec/interplayvideo.c')
| -rw-r--r-- | libavcodec/interplayvideo.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/libavcodec/interplayvideo.c b/libavcodec/interplayvideo.c index df3314d4b7..7c699265dd 100644 --- a/libavcodec/interplayvideo.c +++ b/libavcodec/interplayvideo.c @@ -990,17 +990,20 @@ static int ipvideo_decode_frame(AVCodecContext *avctx, IpvideoContext *s = avctx->priv_data; AVFrame *frame = data; int ret; + int send_buffer; if (av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, NULL)) { av_frame_unref(s->last_frame); av_frame_unref(s->second_last_frame); } - if (buf_size < 2) + if (buf_size < 3) return AVERROR_INVALIDDATA; + send_buffer = AV_RL8(avpkt->data); + /* decoding map contains 4 bits of information per 8x8 block */ - s->decoding_map_size = AV_RL16(avpkt->data); + s->decoding_map_size = AV_RL16(avpkt->data + 1); /* compressed buffer needs to be large enough to at least hold an entire * decoding map */ @@ -1008,9 +1011,9 @@ static int ipvideo_decode_frame(AVCodecContext *avctx, return buf_size; - s->decoding_map = buf + 2; - bytestream2_init(&s->stream_ptr, buf + 2 + s->decoding_map_size, - buf_size - s->decoding_map_size); + s->decoding_map = buf + 3; + bytestream2_init(&s->stream_ptr, buf + 3 + s->decoding_map_size, + buf_size - s->decoding_map_size - 3); if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) return ret; @@ -1028,7 +1031,7 @@ static int ipvideo_decode_frame(AVCodecContext *avctx, ipvideo_decode_opcodes(s, frame); - *got_frame = 1; + *got_frame = send_buffer; /* shuffle frames */ av_frame_unref(s->second_last_frame); |