[Libcdio-devel] [PATCH v2 2/5] Implement get_last_session_os2()

[KO Myung-Hun]

---
 lib/driver/os2.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 54 insertions(+), 2 deletions(-)

diff --git a/lib/driver/os2.c b/lib/driver/os2.c
index c6907ad7..77e233b5 100644
--- a/lib/driver/os2.c
+++ b/lib/driver/os2.c
@@ -66,6 +66,11 @@ typedef struct {
 
   access_mode_t access_mode;
 
+  /* Session information */
+  int    i_first_session;
+  int    i_last_session;
+  int    i_first_track_in_last_session;
+
   /* Track information */
   toc_t  toc[CDIO_CD_MAX_TRACKS + 1];   /* 1 more for leadout */
   int    i_first_track;
@@ -629,6 +634,23 @@ get_discmode_os2(void *p_user_data)
   return discmode;
 }
 
+/*! Get the LSN of the first track of the last session of
+  on the CD.
+
+  @param p_cdio the CD object to be acted upon.
+  @param i_last_session pointer to the session number to be returned.
+*/
+static driver_return_code_t
+get_last_session_os2 (void *p_user_data, /*out*/ lsn_t *i_last_session)
+{
+  _img_private_t *p_env = p_user_data;
+
+  *i_last_session =
+    p_env->toc[ p_env->i_first_track_in_last_session ].lsn_start;
+
+  return DRIVER_OP_SUCCESS;
+}
+
 #define CDROMDISK_EXECMD    0x7A
 
 /* 0, if transfer data to device,  1, if transfer data from device */
@@ -1009,6 +1031,22 @@ read_toc_os2 (void *p_user_data)
 {
   _img_private_t *p_env = p_user_data;
 
+  mmc_cdb_t cdb = {{ 0, }};
+
+  struct {
+    BYTE auc_len[ 2 ];
+    BYTE uc_first_session;
+    BYTE uc_last_session;
+
+    struct {
+      BYTE uc_reserved1;
+      BYTE uc_control_and_adr;
+      BYTE uc_first_track;
+      BYTE uc_reserved2;
+      BYTE auc_lba[ 4 ];
+    } s_last_session;
+  } s_toc;
+
   struct {
     UCHAR auch_sign[4];
   } s_param_disk = {{'C', 'D', '0', '1'}};
@@ -1036,6 +1074,22 @@ read_toc_os2 (void *p_user_data)
   ULONG rc;
   int   i_track;
 
+  CDIO_MMC_SET_COMMAND( cdb.field, CDIO_MMC_GPCMD_READ_TOC );
+  cdb.field[ 2 ] = CDIO_MMC_READTOC_FMT_SESSION;
+  CDIO_MMC_SET_READ_LENGTH16( cdb.field, sizeof( s_toc ));
+  if( run_mmc_cmd_os2( p_env, 0,
+                       mmc_get_cmd_len( cdb.field[ 0 ]), &cdb, 
SCSI_MMC_DATA_READ,
+                       sizeof( s_toc ), &s_toc ) == DRIVER_OP_ERROR )
+  {
+    cdio_warn("read_toc_os2 : run_mmc_cmd_os2(CDIO_MMC_GPCMD_READ_TOC) 
failed\n");
+
+    return false;
+  }
+
+  p_env->i_first_session = s_toc.uc_first_session;
+  p_env->i_last_session = s_toc.uc_last_session;
+  p_env->i_first_track_in_last_session = s_toc.s_last_session.uc_first_track;
+
   rc = DosDevIOCtl(
           p_env->h_cd, IOCTL_CDROMAUDIO, CDROMAUDIO_GETAUDIODISK,
           &s_param_disk, sizeof( s_param_disk ), &ul_param_len,
@@ -1546,9 +1600,7 @@ cdio_open_os2 (const char *psz_orig_source)
   _funcs.get_drive_cap          = get_drive_cap_mmc;
   _funcs.get_first_track_num    = get_first_track_num_generic;
   _funcs.get_hwinfo             = NULL;
-#if 0
   _funcs.get_last_session       = get_last_session_os2;
-#endif
   _funcs.get_media_changed      = get_media_changed_mmc;
   _funcs.get_mcn                = _cdio_get_mcn;
   _funcs.get_num_tracks         = get_num_tracks_generic;
-- 
2.11.0