[FFmpeg-cvslog] Silence warnings when decoding QNAP Systems H264 codec.

[Carl Eugen Hoyos]

ffmpeg | branch: master | Carl Eugen Hoyos <cehoyos at ag.or.at> | Sat Dec  3 03:31:24 2011 +0100| [2d6a45c12a9151aa8c3407cd2981a160c71db708] | committer: Carl Eugen Hoyos

Silence warnings when decoding QNAP Systems H264 codec.

Fixes ticket #571.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2d6a45c12a9151aa8c3407cd2981a160c71db708
---

 libavcodec/h264.c        |    3 ++-
 libavcodec/h264_parser.c |    3 +++
 2 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 3bc13aa..2974d81 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -4083,7 +4083,8 @@ static int decode_frame(AVCodecContext *avctx,
     }
 
     if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
-        if (avctx->skip_frame >= AVDISCARD_NONREF)
+        if (avctx->skip_frame >= AVDISCARD_NONREF ||
+            buf_size >= 4 && !memcmp("Q264", buf, 4))
             return 0;
         av_log(avctx, AV_LOG_ERROR, "no frame!\n");
         return -1;
diff --git a/libavcodec/h264_parser.c b/libavcodec/h264_parser.c
index 0b8798d..ee766a1 100644
--- a/libavcodec/h264_parser.c
+++ b/libavcodec/h264_parser.c
@@ -148,6 +148,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
     unsigned int slice_type;
     int state = -1;
     const uint8_t *ptr;
+    int q264 = buf_size >=4 && !memcmp("Q264", buf, 4);
 
     /* set some sane default values */
     s->pict_type = AV_PICTURE_TYPE_I;
@@ -266,6 +267,8 @@ static inline int parse_nal_units(AVCodecParserContext *s,
         }
         buf += consumed;
     }
+    if (q264)
+        return 0;
     /* didn't find a picture! */
     av_log(h->s.avctx, AV_LOG_ERROR, "missing picture in access unit with size %d\n", buf_size);
     return -1;