* dvb: read more TS blocks at once. We start reading only 2 ts packets (needed to avoid

long delay because we only receive PAT at the start), but we increase each time we read
data until 20. This decrease the load (more than 50% for me) while kepping low start up delay.

modules/access/dvb/access.c

@@ -211,7 +211,8 @@ vlc_module_end();
 static block_t *Block( access_t * );
 static int Control( access_t *, int, va_list );
 
-#define DVB_READ_ONCE 3
+#define DVB_READ_ONCE 20
+#define DVB_READ_ONCE_START 2
 #define TS_PACKET_SIZE 188
 
 static void FilterUnset( access_t *, int i_max );
@@ -297,6 +298,11 @@ static int Open( vlc_object_t *p_this )
 
     E_(CAMOpen)( p_access );
 
+    if( p_sys->b_budget_mode )
+        p_sys->i_read_once = DVB_READ_ONCE;
+    else
+        p_sys->i_read_once = DVB_READ_ONCE_START;
+
     return VLC_SUCCESS;
 }
 
@@ -382,15 +388,18 @@ static block_t *Block( access_t *p_access )
         }
     }
 
-    p_block = block_New( p_access, DVB_READ_ONCE * TS_PACKET_SIZE );
+    p_block = block_New( p_access, p_sys->i_read_once * TS_PACKET_SIZE );
     if( ( p_block->i_buffer = read( p_sys->i_handle, p_block->p_buffer,
-                                    DVB_READ_ONCE * TS_PACKET_SIZE ) ) <= 0 )
+                                    p_sys->i_read_once*TS_PACKET_SIZE ) ) <= 0 )
     {
         msg_Err( p_access, "read failed (%s)", strerror(errno) );
         block_Release( p_block );
         return NULL;
     }
 
+    if( p_sys->i_read_once < DVB_READ_ONCE )
+        p_sys->i_read_once++;
+
     return p_block;
 }
 
@@ -495,6 +504,9 @@ static void FilterSet( access_t *p_access, int i_pid, int i_type )
     }
     p_sys->p_demux_handles[i].i_type = i_type;
     p_sys->p_demux_handles[i].i_pid = i_pid;
+
+    if( p_sys->i_read_once < DVB_READ_ONCE )
+        p_sys->i_read_once++;
 }
 
 static void FilterUnset( access_t *p_access, int i_max )

modules/access/dvb/dvb.h

@@ -74,6 +74,9 @@ struct access_sys_t
     en50221_session_t p_sessions[MAX_SESSIONS];
     mtime_t i_ca_timeout, i_ca_next_event, i_frontend_timeout;
     dvbpsi_pmt_t *pp_selected_programs[MAX_PROGRAMS];
+
+    /* */
+    int i_read_once;
 };
 
 #define VIDEO0_TYPE     1