move h261 demuxer to its own file

Originally committed as revision 24980 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/Makefile

@@ -85,7 +85,7 @@ OBJS-$(CONFIG_GIF_MUXER)                 += gif.o
 OBJS-$(CONFIG_GSM_DEMUXER)               += raw.o
 OBJS-$(CONFIG_GXF_DEMUXER)               += gxf.o
 OBJS-$(CONFIG_GXF_MUXER)                 += gxfenc.o audiointerleave.o
-OBJS-$(CONFIG_H261_DEMUXER)              += raw.o
+OBJS-$(CONFIG_H261_DEMUXER)              += h261dec.o raw.o
 OBJS-$(CONFIG_H261_MUXER)                += raw.o
 OBJS-$(CONFIG_H263_DEMUXER)              += h263dec.o raw.o
 OBJS-$(CONFIG_H263_MUXER)                += raw.o

libavformat/h261dec.c

@@ -0,0 +1,75 @@
+/*
+ * RAW H.261 video demuxer
+ * Copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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 "libavcodec/get_bits.h"
+#include "avformat.h"
+#include "raw.h"
+
+static int h261_probe(AVProbeData *p)
+{
+    uint32_t code= -1;
+    int i;
+    int valid_psc=0;
+    int invalid_psc=0;
+    int next_gn=0;
+    int src_fmt=0;
+    GetBitContext gb;
+
+    init_get_bits(&gb, p->buf, p->buf_size*8);
+
+    for(i=0; i<p->buf_size*8; i++){
+        if ((code & 0x01ff0000) || !(code & 0xff00)) {
+            code = (code<<8) + get_bits(&gb, 8);
+            i += 7;
+        } else
+            code = (code<<1) + get_bits1(&gb);
+        if ((code & 0xffff0000) == 0x10000) {
+            int gn= (code>>12)&0xf;
+            if(!gn)
+                src_fmt= code&8;
+            if(gn != next_gn) invalid_psc++;
+            else              valid_psc++;
+
+            if(src_fmt){ // CIF
+                next_gn= (gn+1     )%13;
+            }else{       //QCIF
+                next_gn= (gn+1+!!gn)% 7;
+            }
+        }
+    }
+    if(valid_psc > 2*invalid_psc + 6){
+        return 50;
+    }else if(valid_psc > 2*invalid_psc + 2)
+        return 25;
+    return 0;
+}
+
+AVInputFormat h261_demuxer = {
+    "h261",
+    NULL_IF_CONFIG_SMALL("raw H.261"),
+    0,
+    h261_probe,
+    ff_raw_video_read_header,
+    ff_raw_read_partial_packet,
+    .flags= AVFMT_GENERIC_INDEX,
+    .extensions = "h261",
+    .value = CODEC_ID_H261,
+};

libavformat/raw.c

@@ -241,47 +241,6 @@ int ff_raw_video_read_header(AVFormatContext *s,
 }
 #endif
 
-#if CONFIG_H261_DEMUXER
-static int h261_probe(AVProbeData *p)
-{
-    uint32_t code= -1;
-    int i;
-    int valid_psc=0;
-    int invalid_psc=0;
-    int next_gn=0;
-    int src_fmt=0;
-    GetBitContext gb;
-
-    init_get_bits(&gb, p->buf, p->buf_size*8);
-
-    for(i=0; i<p->buf_size*8; i++){
-        if ((code & 0x01ff0000) || !(code & 0xff00)) {
-            code = (code<<8) + get_bits(&gb, 8);
-            i += 7;
-        } else
-            code = (code<<1) + get_bits1(&gb);
-        if ((code & 0xffff0000) == 0x10000) {
-            int gn= (code>>12)&0xf;
-            if(!gn)
-                src_fmt= code&8;
-            if(gn != next_gn) invalid_psc++;
-            else              valid_psc++;
-
-            if(src_fmt){ // CIF
-                next_gn= (gn+1     )%13;
-            }else{       //QCIF
-                next_gn= (gn+1+!!gn)% 7;
-            }
-        }
-    }
-    if(valid_psc > 2*invalid_psc + 6){
-        return 50;
-    }else if(valid_psc > 2*invalid_psc + 2)
-        return 25;
-    return 0;
-}
-#endif
-
 #if CONFIG_DIRAC_DEMUXER
 static int dirac_probe(AVProbeData *p)
 {
@@ -513,20 +472,6 @@ AVInputFormat gsm_demuxer = {
 };
 #endif
 
-#if CONFIG_H261_DEMUXER
-AVInputFormat h261_demuxer = {
-    "h261",
-    NULL_IF_CONFIG_SMALL("raw H.261"),
-    0,
-    h261_probe,
-    ff_raw_video_read_header,
-    ff_raw_read_partial_packet,
-    .flags= AVFMT_GENERIC_INDEX,
-    .extensions = "h261",
-    .value = CODEC_ID_H261,
-};
-#endif
-
 #if CONFIG_H261_MUXER
 AVOutputFormat h261_muxer = {
     "h261",