New option --obs_pad

cdrskin/cdrskin.1

@@ -2,7 +2,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH CDRSKIN 1 "Jan 12, 2012"
+.TH CDRSKIN 1 "Version 1.2.3, Jan 12, 2012"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -1051,9 +1051,10 @@ overwriteable DVD-RW it is 32k.
 .BI dvd_obs= default|32k|64k
 Linux specific:
 Set the number of bytes to be transmitted with each write operation to DVD
-or BD media. Tracks get padded up to the next multiple of this write
+or BD media. With most write types, tracks get padded up to the next multiple
-size. A number of 64 KB may improve throughput with bus systems which
+of this write size (see option obs_pad=).
-show latency problems. The default depends on media type, option
+A number of 64 KB may improve throughput with systems
+which show latency problems. The default depends on media type, option
 stream_recording=, and on compile time options.
 .TP
 .BI fallback_program= command
@@ -1477,6 +1478,15 @@ Such opening is needed for Bus,Target,Lun addresses unless option
 addresses which are not listed with cdrskin --devices but nevertheless point
 to a usable drive. (Like /dev/sg0 using the same SCSI address as /dev/sr0.)
 .TP
+.BI \--obs_pad
+Pad the data of last write operation of a DVD-R[W] DAO session or
+stdio: pseudo-drive up to the full size of an output chunk.
+This padding has to be applied automatically to the other DVD and BD media
+types, where it causes e.g. ISO images to have trailing unclaimed blocks.
+.br
+There are reports that DAO sessions of a size that is not a multiple of 16
+blocks abort on some Linux kernels and/or DVD drives.
+.TP
 .BI \--old_pseudo_scsi_adr
 Linux specific:
 Use and report literal Bus,Target,Lun addresses rather than real SCSI and

cdrskin/cdrskin.c

@@ -2865,6 +2865,7 @@ set_dev:;
      printf(" --no_convert_fs_adr  only literal translations of dev=\n");
      printf(
          " --no_rc            as first argument: do not read startup files\n");
+     printf(" --obs_pad          pad DVD DAO to full 16 or 32 blocks\n");
      printf(" --old_pseudo_scsi_adr  use and report literal Bus,Target,Lun\n");
      printf("                    rather than real SCSI and pseudo ATA.\n");
      printf(" --prodvd_cli_compatible  react on some DVD types more like\n");
@@ -3320,6 +3321,7 @@ struct CdrskiN {
  int force_is_set;
  int stream_recording_is_set; /* see burn_write_opts_set_stream_recording() */
  int dvd_obs;                 /* DVD write chunk size: 0, 32k or 64k */
+ int obs_pad;                 /* Whether to force obs end padding */
  int stdio_sync;              /* stdio fsync interval: -1, 0, >=32 */
  int single_track;
  int prodvd_cli_compatible;
@@ -3571,6 +3573,7 @@ int Cdrskin_new(struct CdrskiN **skin, struct CdrpreskiN *preskin, int flag)
  o->force_is_set= 0;
  o->stream_recording_is_set= 0;
  o->dvd_obs= 0;
+ o->obs_pad= 0;
  o->stdio_sync= 0;
  o->single_track= 0;
  o->prodvd_cli_compatible= 0;
@@ -6981,6 +6984,7 @@ burn_failed:;
  else
 #endif
    burn_write_opts_set_dvd_obs(o, skin->dvd_obs);
+ burn_write_opts_set_obs_pad(o, skin->obs_pad);
  burn_write_opts_set_stdio_fsync(o, skin->stdio_sync);
 
  if(skin->dummy_mode) {
@@ -8259,6 +8263,9 @@ msifile_equals:;
    } else if(strcmp(argv[i],"-nopreemp")==0) {
      skin->track_modemods&= ~BURN_PREEMPHASIS;
 
+   } else if(strcmp(argv[i],"--obs_pad")==0) {
+     skin->obs_pad= 1;
+
    } else if(strcmp(argv[i],"--old_pseudo_scsi_adr")==0) {
      /* is handled in Cdrpreskin_setup() */;
 

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2012.04.08.112703"
+#define Cdrskin_timestamP "2012.04.08.112825"