Gave up cdrskin specific O_DIRECT compile option

cdrskin/README

@@ -397,14 +397,16 @@ drive. See man page section FILES for a way to lift that ban.
 
                         Special compilation variations
 
-All following options of cdrskin/compile_cdrskin.sh are combinable.
+All following options of ./configure and cdrskin/compile_cdrskin.sh are
+combinable.
 
-In some situations Linux delivers a better write performance to drives if
+In some situations Linux may deliver a better write performance to drives if
-the track input is read with O_DIRECT (see man 2 open). The input reader of
+the track input is read with O_DIRECT (see man 2 open). The API call
-the cdrskin fifo can be told to use this peculiar read mode by :
+burn_os_open_track_src() and the input readers of cdrskin and libburn fifo
-    cdrskin/compile_cdrskin.sh -o_direct
+can be told to use this peculiar read mode by:
+   --enable-track-src-odirect
 
-But typically cdrskin option dvd_obs=64k will yield even better performance in
+But often cdrskin option dvd_obs=64k will yield even better performance in
 such a situation. 64k can be made default at compile time by 
     cdrskin/compile_cdrskin.sh -dvd_obs_64k
 It can also be enabled at configure time by

cdrskin/cdrfifo.c

@@ -25,9 +25,10 @@
 #include <sys/time.h>
 #include <sys/select.h>
 
-#ifdef Cdrskin_read_o_direcT
+#ifndef Cdrfifo_standalonE
-#include <sys/mman.h>
+/* <<< until release of 0.7.4 : for Libburn_has_open_trac_srC */
-#endif /* Cdrskin_read_o_direcT */
+#include "../libburn/libburn.h"
+#endif
 
 #include "cdrfifo.h"
 
@@ -179,19 +180,14 @@ int Cdrfifo_new(struct CdrfifO **ff, int source_fd, int dest_fd,
  o->next= o->prev= NULL;
  o->chain_idx= 0;
 
-#ifdef Cdrskin_read_o_direcT
+#ifdef Libburn_has_open_trac_srC
- if(flag & 1)
+ o->buffer= burn_os_alloc_buffer((size_t) buffer_size, 0);
-   fprintf(stderr,"cdrfifo: DEBUG : allocating fifo buffer via mmap()\n");
- o->buffer= mmap(NULL, (size_t) buffer_size, PROT_READ | PROT_WRITE,
-                 MAP_SHARED | MAP_ANONYMOUS, -1, (off_t) 0);
- if(o->buffer == MAP_FAILED)
-   goto failed;
 #else
  o->buffer= TSOB_FELD(char,buffer_size);
+#endif /* ! Libburn_has_open_trac_srC */
+
  if(o->buffer==NULL)
    goto failed;
-#endif /* ! Cdrskin_read_o_direcT */
-
  return(1);
 failed:;
  Cdrfifo_destroy(ff,0);
@@ -243,11 +239,11 @@ int Cdrfifo_destroy(struct CdrfifO **ff, int flag)
    free((char *) o->iso_fs_descr);
 
  if(o->buffer!=NULL)
-#ifdef Cdrskin_read_o_direcT
+#ifdef Libburn_has_open_trac_srC
-   munmap(o->buffer, o->buffer_size);
+   burn_os_free_buffer(o->buffer, o->buffer_size, 0);
 #else
    free((char *) o->buffer);
-#endif /* Cdrskin_read_o_direcT */
+#endif /* Libburn_has_open_trac_srC */
 
  free((char *) o);
  (*ff)= NULL;
@@ -681,15 +677,12 @@ after_write:;
  if(o->source_fd>=0) if(FD_ISSET((o->source_fd),rds)) {
    can_read= o->buffer_size - o->write_idx;
 
-#ifdef Cdrskin_read_o_direcT
+#ifdef Libburn_has_open_trac_srC
 
    /* ts A91115
       This chunksize must be aligned to filesystem blocksize.
-      One might try to inquire the block size behind o->source_fd, but since
-      O_DIRECT is a dirty hack anyway, i just guess that 64 KiB is divisible
-      by any existing block size on Linux.
     */
-#define Cdrfifo_o_direct_chunK 65536
+#define Cdrfifo_o_direct_chunK 32768
 
    if(o->write_idx < o->read_idx && o->write_idx + can_read > o->read_idx)
      can_read= o->read_idx - o->write_idx;
@@ -721,7 +714,7 @@ after_write:;
      }
    } else
 
-#else /* Cdrskin_read_o_direcT */
+#else /* Libburn_has_open_trac_srC */
 
    if(can_read>o->chunk_size)
      can_read= o->chunk_size;
@@ -734,7 +727,7 @@ after_write:;
    if(can_read>0)
      ret= read(o->source_fd,o->buffer+o->write_idx,can_read);
 
-#endif /* ! Cdrskin_read_o_direcT */
+#endif /* ! Libburn_has_open_trac_srC */
 
    if(ret==-1) {
 

cdrskin/cdrskin.c

@@ -152,6 +152,9 @@ or
 */
 #define Cdrskin_libburn_has_fsync_obS 1
 
+/* >>> do not forget to remove Libburn_has_open_trac_srC at release of 0.7.4 */
+
+
 #endif /* Cdrskin_libburn_0_7_3 */
 
 #ifndef Cdrskin_libburn_versioN
@@ -343,23 +346,6 @@ or
 /** Verbosity level for fifo debugging */
 #define Cdrskin_verbose_debug_fifO 4
 
-#ifdef Cdrskin_read_o_direcT
-/* Linux 2.6.18:
-   This can avoid low write speed via USB with 32 KB SCSI write chunks.
-   64 KB write chunking is 20% more effective, though, and this size is
-   not in need for O_DIRECT.
-   Strange: Vanilla read() brings USB 32 KB WRITE down from 11x to 7.5x.
-   Throughput from /dev/zero to /dev/null is 230x. The disk delivers 56x.
-   Clearly Linux USB has a problem with 32 KB chunks. read() without O_DIRECT
-   makes it worse.
-   cdrecord and growisofs bring 11x. At least growisofs uses O_DIRECT for its
-   fifo input.
-*/
-# ifndef _GNU_SOURCE
-#  define _GNU_SOURCE
-# endif
-#endif /* Cdrskin_read_o_direcT */
-
 
 #include <stdio.h>
 #include <ctype.h>
@@ -1319,7 +1305,7 @@ int Cdrtrack_seek_isosize(struct CdrtracK *track, int fd, int flag)
                 bit0=debugging verbosity
                 bit1=open as source for direct write: 
                      no audio extract, no minimum track size
-                bit2=permission to use O_DIRECT (if enabled at compile time)
+                bit2=permission to use burn_os_open_track_src() (evtl O_DIRECT)
     @return <=0 error, 1 success
 */
 int Cdrtrack_open_source_path(struct CdrtracK *track, int *fd, int flag)
@@ -1410,17 +1396,13 @@ int Cdrtrack_open_source_path(struct CdrtracK *track, int *fd, int flag)
    if(is_wav==-3)
      return(0);
    if(is_wav==0) {
-#ifdef Cdrskin_read_o_direcT
+#ifdef Libburn_has_open_trac_srC
-     if(flag & 4) {
+     if(flag & 4)
-       *fd= open64(track->source_path, O_RDONLY | O_DIRECT);
+       *fd= burn_os_open_track_src(track->source_path, O_RDONLY, 0);
-       if(flag & 1)
+     else
-         fprintf(stderr,"cdrskin: DEBUG : opened track inlet O_DIRECT\n");
-     } else
 #endif
-     {
        *fd= open(track->source_path, O_RDONLY);
    }
-   }
    if(*fd==-1) {
      fprintf(stderr,"cdrskin: failed to open source address '%s'\n",
              track->source_path);
@@ -1603,7 +1585,7 @@ int Cdrtrack_add_to_session(struct CdrtracK *track, int trackno,
 */
 {
  struct burn_track *tr;
- struct burn_source *src= NULL;
+ struct burn_source *src= NULL, *fd_src= NULL;
  double padding,lib_padding;
  int ret,sector_pad_up;
  double fixed_size;
@@ -1660,6 +1642,33 @@ int Cdrtrack_add_to_session(struct CdrtracK *track, int trackno,
  }
  src= burn_fd_source_new(track->source_fd,-1,(off_t) fixed_size);
 
+/*
+#define Cdrskin_try_libburn_fifO 1
+*/
+
+#ifdef Cdrskin_try_libburn_fifO
+
+ if(src != NULL) {
+   int fifo_enabled, fifo_size, fifo_start_at;
+   int Cdrskin_get_fifo_par(struct CdrskiN *skin, int *fifo_enabled,
+                            int *fifo_size, int *fifo_start_at, int flag);
+
+   Cdrskin_get_fifo_par(track->boss, &fifo_enabled, &fifo_size, &fifo_start_at,
+                        0);
+   if(fifo_size <= 0) { /* currently: hardcoded 32m if fs=0 */
+     fd_src= src;
+
+     /* >>> ??? will chunksize 2048 work with audio ? */
+
+     src= burn_fifo_source_new(fd_src, 2048, 16384, 1);
+
+     fprintf(stderr, "cdrskin_DEBUG: %s 32m libburn fifo\n",
+             src != NULL ? "installed" : "failed to install");
+   }
+ }
+
+#endif
+
  if(src==NULL) {
    fprintf(stderr,
            "cdrskin: FATAL : Could not create libburn data source object\n");
@@ -1672,6 +1681,8 @@ int Cdrtrack_add_to_session(struct CdrtracK *track, int trackno,
  burn_session_add_track(session,tr,BURN_POS_END);
  ret= 1;
 ex:
+ if(fd_src!=NULL)
+   burn_source_free(fd_src);
  if(src!=NULL)
    burn_source_free(src);
  return(ret);

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2009.11.23.185725"
+#define Cdrskin_timestamP "2009.11.23.193252"

cdrskin/compile_cdrskin.sh

@@ -60,9 +60,6 @@ do
   elif test "$i" = "-no_largefile"
   then
     largefile_opts=	
-  elif test "$i" = "-o_direct"
-  then
-    def_opts="$def_opts -DCdrskin_read_o_direcT"
   elif test "$i" = "-dvd_obs_64k"
   then
     def_opts="$def_opts -DCdrskin_dvd_obs_default_64K"
@@ -88,7 +85,6 @@ do
     echo "  -compile_dewav    compile program test/dewav without libburn."
     echo "  -libburn_0_7_2    set macro to match libburn-0.7.2"
     echo "  -libburn_svn      set macro to match current libburn-SVN."
-    echo "  -o_direct         use open(O_DIRECT) on fifo input (Linux only)."
     echo "  -dvd_obs_64k      64 KB default size for DVD/BD writing."
     echo "  -do_not_compile_cdrskin  omit compilation of cdrskin/cdrskin."
     echo "  -experimental     use newly introduced libburn features."