[xiph-commits] r14492 - experimental/giles/rogg

[giles at svn.xiph.org]

Author: giles
Date: 2008-02-12 16:34:56 -0800 (Tue, 12 Feb 2008)
New Revision: 14492

Added:
   experimental/giles/rogg/rogg_crcfix.c
Modified:
   experimental/giles/rogg/Makefile
Log:
Script to fix Ogg page CRCs. May not be working.


Modified: experimental/giles/rogg/Makefile
===================================================================
--- experimental/giles/rogg/Makefile	2008-02-12 22:07:01 UTC (rev 14491)
+++ experimental/giles/rogg/Makefile	2008-02-13 00:34:56 UTC (rev 14492)
@@ -7,7 +7,8 @@
 
 OPTS = -g -O2 -Wall
 
-rogg_UTILS = rogg_pagedump rogg_eosfix rogg_aspect rogg_stats
+rogg_UTILS = rogg_pagedump rogg_eosfix rogg_crcfix \
+	rogg_aspect rogg_stats
 
 all : librogg.a $(rogg_UTILS)
 
@@ -20,6 +21,9 @@
 rogg_eosfix : rogg_eosfix.o librogg.a
 	$(CC) $(CFLAGS) -o $@ $^
 
+rogg_crcfix : rogg_crcfix.o librogg.a
+	$(CC) $(CFLAGS) -o $@ $^
+
 rogg_pagedump : rogg_pagedump.o librogg.a
 	$(CC) $(CFLAGS) -o $@ $^
 

Added: experimental/giles/rogg/rogg_crcfix.c
===================================================================
--- experimental/giles/rogg/rogg_crcfix.c	                        (rev 0)
+++ experimental/giles/rogg/rogg_crcfix.c	2008-02-13 00:34:56 UTC (rev 14492)
@@ -0,0 +1,112 @@
+/*
+   Copyright (C) 2005-2008 Xiph.org Foundation
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+   PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* simple script example for the rogg library */
+
+/* compile with
+   gcc -O2 -g -Wall -I. -o rogg_crcfix rogg.c rogg_crcfix.c
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <rogg.h>
+
+void print_header_info(FILE *out, rogg_page_header *header)
+{
+  fprintf(out, " Ogg page serial %08x seq %d (%5d bytes)",
+	header->serialno, header->sequenceno, header->length);
+  fprintf(out, (header->continued) ? " c" : "  ");
+  fprintf(out, " granule %lld", (long long int)header->granulepos);
+  fprintf(out, (header->bos) ? " bos" : "");
+  fprintf(out, (header->eos) ? " eos" : "");
+  fprintf(out, "\n");
+}
+
+int main(int argc, char *argv[])
+{
+  int f, i;
+  unsigned char *p, *q, *o, *e;
+  struct stat s;
+  rogg_page_header header;
+
+  for (i = 1; i < argc; i++) {
+    /* open and mmap each filename argument */
+    f = open(argv[i], O_RDWR);
+    if (f < 0) {
+	fprintf(stderr, "couldn't open '%s'\n", argv[i]);
+	continue;
+    }
+    if (fstat(f, &s) < 0) {
+	fprintf(stderr, "couldn't stat '%s'\n", argv[i]);
+	close(f);
+	continue;
+    }
+    p = mmap(0, s.st_size, PROT_READ|PROT_WRITE,
+	MAP_SHARED, f, 0);
+    if (p == NULL) {
+	fprintf(stderr, "couldn't mmap '%s'\n", argv[i]);
+	close(f);
+	continue;
+    }
+    fprintf(stdout, "Dumping Ogg file '%s'\n", argv[i]);
+    e = p + s.st_size;
+    q = rogg_scan(p, s.st_size);
+    if (q == NULL) {
+	fprintf(stdout, "couldn't find ogg data!\n");
+    } else {
+      if (q > p) {
+	fprintf(stdout, "Skipped %d garbage bytes at the start\n", (int)(q-p));
+      } 
+      while (q < e) {
+	o = rogg_scan(q, e-q);
+	if (o > q) {
+	  fprintf(stdout, "Hole in data! skipped %d bytes\n", (int)(o-q));
+	   q = o;
+	} else if (o == NULL) {
+	  fprintf(stdout, "Skipped %d garbage bytes as the end\n", (int)(e-q));
+	  break;
+	}
+	rogg_page_update_crc(q);
+	rogg_page_parse(q, &header);
+	print_header_info(stdout, &header);
+	q += header.length;
+      }
+    }
+    munmap(p, s.st_size);
+    close(f);
+  }
+  return 0;
+}