[vlc-devel] commit: x264.c: add option to adjust lookahead (Ilkka Ollakka )

[git version control]

vlc | branch: 1.0-bugfix | Ilkka Ollakka <ileoo at iki.fi> | Sun Nov 15 14:48:33 2009 +0200| [0b4ee0c016a54aa98f5ce02ea760de883c322bbd] | committer: Ilkka Ollakka 

x264.c: add option to adjust lookahead

Limit range to 0..60 currently, as x264 tunes doesn't seem to use larger
values than that

cherry-picked from df6af2ed88a5eef071ab92a6d5fba2df461252c0

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=0b4ee0c016a54aa98f5ce02ea760de883c322bbd
---

 modules/codec/x264.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/modules/codec/x264.c b/modules/codec/x264.c
index dd73922..3b91a51 100644
--- a/modules/codec/x264.c
+++ b/modules/codec/x264.c
@@ -412,6 +412,11 @@ static const char *const enc_me_list_text[] =
   { N_("dia"), N_("hex"), N_("umh"), N_("esa") };
 #endif
 
+#define LOOKAHEAD_TEXT N_("Framecount to use on frametype lookahead")
+#define LOOKAHEAD_LONGTEXT N_("Framecount to use on frametype lookahead. " \
+    "Currently default is lower than x264 default because unmuxable output" \
+    "doesn't handle larger values that well yet" )
+
 #if X264_BUILD >= 58 /* r728 */
 static const char *const enc_me_list[] =
   { "dia", "hex", "umh", "esa", "tesa" };
@@ -700,6 +705,13 @@ vlc_module_begin ()
               FAST_PSKIP_LONGTEXT, false )
 #endif
 
+#if X264_BUILD >= 69
+    add_integer( SOUT_CFG_PREFIX "lookahead", 5, NULL, LOOKAHEAD_TEXT,
+                 LOOKAHEAD_LONGTEXT, false )
+        change_integer_range( 0, 60 )
+#endif
+
+
 #if X264_BUILD >= 46 /* r503 */
     add_bool( SOUT_CFG_PREFIX "dct-decimate", 1, NULL, DCT_DECIMATE_TEXT,
               DCT_DECIMATE_LONGTEXT, false )
@@ -1420,7 +1432,7 @@ static int  Open ( vlc_object_t *p_this )
     /* Set lookahead value to lower than default,
      * as rtp-output without mux doesn't handle
      * difference that well yet*/
-    p_sys->param.rc.i_lookahead=5;
+    p_sys->param.rc.i_lookahead= var_GetInteger( p_enc, SOUT_CFG_PREFIX "lookahead" );
 #endif
 
     /* Open the encoder */