[FFmpeg-cvslog] brstm: also allocate b->table in read_packet

[Andreas Cadhalpun]

ffmpeg | branch: release/2.8 | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Mon Jan  4 12:53:20 2016 +0100| [247bb203e4e280142beaebd4c9d6c1519a8f7fa0] | committer: Andreas Cadhalpun

brstm: also allocate b->table in read_packet

This fixes NULL pointer dereferencing if the codec is forced to
adpcm_thp even though a different one was detected.

Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
(cherry picked from commit bcf4ee26a0a1ed349ec7489925540401002b87cc)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=247bb203e4e280142beaebd4c9d6c1519a8f7fa0
---

 libavformat/brstm.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavformat/brstm.c b/libavformat/brstm.c
index 7cb1341..e4a351b 100644
--- a/libavformat/brstm.c
+++ b/libavformat/brstm.c
@@ -392,6 +392,10 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
         if (!b->adpc) {
             av_log(s, AV_LOG_ERROR, "adpcm_thp requires ADPC chunk, but none was found.\n");
             return AVERROR_INVALIDDATA;
+        if (!b->table) {
+            b->table = av_mallocz(32 * codec->channels);
+            if (!b->table)
+                return AVERROR(ENOMEM);
         }
 
         if (size > (INT_MAX - 32 - 4) ||