diff ffmpeg/libavformat/h264dec.c @ 11:f445c3017523

new files

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavformat/h264dec.c	Sun Apr 21 11:16:23 2013 +0200
@@ -0,0 +1,70 @@
+/*
+ * RAW H.264 video demuxer
+ * Copyright (c) 2008 Michael Niedermayer <[e-mail]>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avformat.h"
+#include "rawdec.h"
+
+static int h264_probe(AVProbeData *p)
+{
+    uint32_t code= -1;
+    int sps=0, pps=0, idr=0, res=0, sli=0;
+    int i;
+
+    for(i=0; i<p->buf_size; i++){
+        code = (code<<8) + p->buf[i];
+        if ((code & 0xffffff00) == 0x100) {
+            int ref_idc= (code>>5)&3;
+            int type   = code & 0x1F;
+            static const int8_t ref_zero[32]={
+                2, 0, 0, 0, 0,-1, 1,-1,
+               -1, 1, 1, 1, 1,-1, 2, 2,
+                2, 2, 2, 0, 2, 2, 2, 2,
+                2, 2, 2, 2, 2, 2, 2, 2
+            };
+
+            if(code & 0x80) //forbidden bit
+                return 0;
+
+            if(ref_zero[type] == 1 && ref_idc)
+                return 0;
+            if(ref_zero[type] ==-1 && !ref_idc)
+                return 0;
+            if(ref_zero[type] == 2)
+                res++;
+
+            switch(type){
+            case     1:   sli++; break;
+            case     5:   idr++; break;
+            case     7:
+                if (p->buf[i + 2] & 0x03)
+                    return 0;
+                sps++;
+                break;
+            case     8:   pps++; break;
+            }
+        }
+    }
+    if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
+        return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
+    return 0;
+}
+
+FF_DEF_RAWVIDEO_DEMUXER(h264 , "raw H.264 video", h264_probe, "h26l,h264,264", AV_CODEC_ID_H264)