From 3550d239a6cb2eb8ae2ecb1dc80247ef2f549601 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 7 Apr 2015 02:47:36 +0200 Subject: [PATCH] avcodec/h264: finish previous slices before switching to single thread mode Fixes null pointer dereference Fixes Ticket4438 Signed-off-by: Michael Niedermayer (cherry picked from commit c4b2017ba66e1623da9f527704c61c86a6e74844) Conflicts: libavcodec/h264.c --- libavcodec/h264.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libavcodec/h264.c b/libavcodec/h264.c index e64cc0780a..6fa0b7b8c6 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -1680,6 +1680,12 @@ again: av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n"); h->ref_count[0] = h->ref_count[1] = h->list_count = 0; } else if (err == SLICE_SINGLETHREAD) { + if (context_count > 1) { + ret = ff_h264_execute_decode_slices(h, context_count - 1); + if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE)) + goto end; + context_count = 0; + } /* Slice could not be decoded in parallel mode, copy down * NAL unit stuff to context 0 and restart. Note that * rbsp_buffer is not transferred, but since we no longer