dump h263 frame headers from vivo

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2666 b3059339-0415-0410-9bf9-f77b7e298cf2
2024-12-18 12:55:16 +00:00 · 2001-11-04 00:00:38 +00:00 · 2001-11-04 00:00:38 +00:00 · fb794e7e91
commit fb794e7e91
parent 663c4f8eb0
1 changed files with 144 additions and 0 deletions
--- a/TOOLS/vivodump.c
+++ b/TOOLS/vivodump.c
@ -0,0 +1,144 @@
+#include <stdio.h>
+
+static const short h263_format[8][2] = {
+    { 0, 0 },
+    { 128, 96 },
+    { 176, 144 },
+    { 352, 288 },
+    { 704, 576 },
+    { 1408, 1152 },
+};
+
+unsigned char* buffer;
+int bufptr=0;
+int bitcnt=0;
+unsigned char buf=0;
+
+unsigned int x_get_bits(int n){
+    unsigned int x=0;
+    while(n-->0){
+	if(!bitcnt){
+	    // fill buff
+	    buf=buffer[bufptr++];
+	    bitcnt=8;
+	}
+	//x=(x<<1)|(buf&1);buf>>=1;
+	x=(x<<1)|(buf>>7);buf<<=1;
+	--bitcnt;
+    }
+    return x;
+}
+
+#define get_bits(xxx,n) x_get_bits(n)
+#define get_bits1(xxx) x_get_bits(1)
+#define skip_bits(xxx,n) x_get_bits(n)
+#define skip_bits1(xxx) x_get_bits(1)
+
+/* most is hardcoded. should extend to handle all h263 streams */
+int h263_decode_picture_header(unsigned char *b_ptr)
+{
+    int format, width, height;
+    
+    buffer=b_ptr;
+    bufptr=bitcnt=buf=0;
+
+    /* picture header */
+    if (get_bits(&s->gb, 22) != 0x20)
+        return -1;
+    skip_bits(&s->gb, 8); /* picture timestamp */
+
+    if (get_bits1(&s->gb) != 1)
+        return -1;	/* marker */
+    if (get_bits1(&s->gb) != 0)
+        return -1;	/* h263 id */
+    skip_bits1(&s->gb);	/* split screen off */
+    skip_bits1(&s->gb);	/* camera  off */
+    skip_bits1(&s->gb);	/* freeze picture release off */
+
+    format = get_bits(&s->gb, 3);
+
+    if (format != 7) {
+        printf("h263_plus = 0  format = %d\n",format);
+        /* H.263v1 */
+        width = h263_format[format][0];
+        height = h263_format[format][1];
+	printf("%d x %d\n",width,height);
+        if (!width)
+            return -1;
+
+	printf("pict_type=%d\n",get_bits1(&s->gb));
+	printf("unrestricted_mv=%d\n",get_bits1(&s->gb));
+#if 1
+	printf("SAC: %d\n",get_bits1(&s->gb));
+	printf("advanced prediction mode: %d\n",get_bits1(&s->gb));
+	printf("PB frame: %d\n",get_bits1(&s->gb));
+#else
+        if (get_bits1(&s->gb) != 0)
+            return -1;	/* SAC: off */
+        if (get_bits1(&s->gb) != 0)
+            return -1;	/* advanced prediction mode: off */
+        if (get_bits1(&s->gb) != 0)
+            return -1;	/* not PB frame */
+#endif
+	printf("qscale=%d\n",get_bits(&s->gb, 5));
+        skip_bits1(&s->gb);	/* Continuous Presence Multipoint mode: off */
+    } else {
+        printf("h263_plus = 1\n");
+        /* H.263v2 */
+        if (get_bits(&s->gb, 3) != 1)
+            return -1;
+        if (get_bits(&s->gb, 3) != 6) /* custom source format */
+            return -1;
+        skip_bits(&s->gb, 12);
+        skip_bits(&s->gb, 3);
+	printf("pict_type=%d\n",get_bits(&s->gb, 3) + 1);
+//        if (s->pict_type != I_TYPE &&
+//            s->pict_type != P_TYPE)
+//            return -1;
+        skip_bits(&s->gb, 7);
+        skip_bits(&s->gb, 4); /* aspect ratio */
+        width = (get_bits(&s->gb, 9) + 1) * 4;
+        skip_bits1(&s->gb);
+        height = get_bits(&s->gb, 9) * 4;
+	printf("%d x %d\n",width,height);
+        if (height == 0)
+            return -1;
+	printf("qscale=%d\n",get_bits(&s->gb, 5));
+    }
+
+    /* PEI */
+    while (get_bits1(&s->gb) != 0) {
+        skip_bits(&s->gb, 8);
+    }
+//    s->f_code = 1;
+//    s->width = width;
+//    s->height = height;
+    return 0;
+}
+
+
+int main(){
+int c;
+unsigned int head=-1;
+int pos=0;
+
+while((c=getchar())>=0){
+    ++pos;
+    head=(head<<8)|c;
+    if((head&0xFFFFFF)==0x80){
+        unsigned char buf[33];
+	int i;
+	buf[0]=buf[1]=0; buf[2]=0x80;
+	printf("%08X: 00 00 80",pos);
+	for(i=0;i<30;i++){
+	    c=getchar();++pos;
+	    printf(" %02X",c);
+	    buf[3+i]=c;
+	}
+	printf("\n");
+	h263_decode_picture_header(buf);
+    }
+}
+
+
+}