[patch] patch to include speed setting of DVD-ROM

setcd-1.5.patch (text/plain), 2.27 KB, created by Shane Chen on 2006-08-01 15:51:12 UTC

--- setcd.c
+++ setcd.c
@@ -1,5 +1,6 @@
 /* Setcd.c: Set various flags to control the behaviour of your cdrom device.
    (c) 1997 David A. van Leeuwen
+   (c) 2004 Thomas Fritzsche <[e-mail]>
 
    $Id: setcd.c,v 1.4 1999/08/24 19:07:34 david Exp $
 
@@ -23,7 +24,7 @@
 #include <fcntl.h>
 #include <ctype.h>		/* tolower */
 #include <unistd.h>		/* lseek, read */
-#include <string.h>		/* strncmp */
+#include <string.h>		/* strncmp, memset */
 #include <sys/ioctl.h>		/* ioctl */
 #include <linux/cdrom.h>
 #ifndef CDC_CLOSE_TRAY		/* moved into cdrom.h... */
@@ -248,7 +249,49 @@
 	  if (set || clear || status)
 	       print_options(flags, set | clear | ~0 * status);
 	  if (speed>=0) {
-	       if (ioctl(fd, CDROM_SELECT_SPEED, speed)<0) {
+	       struct cdrom_generic_command cgc;
+	       struct request_sense sense;
+	       unsigned char buffer[28];
+	       unsigned long rw_size;
+	       memset(&cgc, 0, sizeof(cgc));
+	       memset(&sense, 0, sizeof(sense));
+	       memset(&buffer, 0, sizeof(buffer));
+	       /* SET STREAMING command */ 
+	       cgc.cmd[0] = 0xb6;
+	       /* 28 byte parameter list length */
+	       cgc.cmd[10] = 28;
+	       cgc.sense = &sense;
+	       cgc.buffer = buffer;
+	       cgc.buflen = sizeof(buffer);
+	       cgc.data_direction = CGC_DATA_WRITE;
+	       cgc.quiet = 1;
+	       if(speed == 0) {
+		    /* set Restore Drive Defaults */  
+		    buffer[0] = 4;
+	       }
+	       buffer[8] = 0xff;
+	       buffer[9] = 0xff;
+	       buffer[10] = 0xff;
+	       buffer[11] = 0xff;
+	       rw_size = 177 * speed;
+	       /* read size */
+	       buffer[12] = (rw_size >> 24) & 0xff;
+	       buffer[13] = (rw_size >> 16) & 0xff;
+	       buffer[14] = (rw_size >>  8) & 0xff;
+	       buffer[15] = rw_size & 0xff;
+	       /* read time 1 sec. */
+	       buffer[18] = 0x03;
+	       buffer[19] = 0xE8;
+	       /* write size */
+	       buffer[20] = (rw_size >> 24) & 0xff;
+	       buffer[21] = (rw_size >> 16) & 0xff;
+	       buffer[22] = (rw_size >>  8) & 0xff;
+	       buffer[23] = rw_size & 0xff;
+	       /* write time 1 sec. */
+	       buffer[26] = 0x03;
+	       buffer[27] = 0xE8;
+	       if ((ioctl(fd, CDROM_SEND_PACKET, &cgc) != 0)
+			 && (ioctl(fd, CDROM_SELECT_SPEED, speed) < 0)) {
 		    perror("can't set speed");
 		    exit(-6);
 	       } else {