[FFmpeg-cvslog] mjpegdec: properly report unsupported disabled features

[Luca Barbato]

ffmpeg | branch: release/0.10 | Luca Barbato <lu_zero at gentoo.org> | Tue May 14 15:27:26 2013 +0200| [a03dcec364747aea0c7e8c9fa2b5d00f5e799812] | committer: Reinhard Tartler

mjpegdec: properly report unsupported disabled features

When JPEG-LS support is disabled the decoder would feed the
data to the JPEG Lossless decode_*_scan function resulting in
faulty decoding.

CC: libav-stable at libav.org
(cherry picked from commit b25e49b187617c486ae3f50a5cbb356fc0e868bb)

Signed-off-by: Reinhard Tartler <siretart at tauware.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a03dcec364747aea0c7e8c9fa2b5d00f5e799812
---

 libavcodec/mjpegdec.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 542de98..18c52b9 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -1489,6 +1489,12 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
             else if (start_code == COM)
                 mjpeg_decode_com(s);
 
+            if (!CONFIG_JPEGLS_DECODER &&
+                (start_code == SOF48 || start_code == LSE)) {
+                av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
+                return AVERROR(ENOSYS);
+            }
+
             switch (start_code) {
             case SOI:
                 s->restart_interval = 0;