[oe] [PATCH] x264-r2245: add a hack for uclibc - replace log2f(x) with logf(x)/logf(2)
Bernhard.Guillon at opensimpad.org
Bernhard.Guillon at opensimpad.org
Fri Nov 26 23:22:50 UTC 2010
From: Bernhard Guillon <Bernhard.Guillon at opensimpad.org>
Signed-off-by: Bernhard Guillon <Bernhard.Guillon at opensimpad.org>
---
recipes/vlc/x264-r2245/uclibc_log2f_fix.HACK.patch | 61 ++++++++++++++++++++
recipes/vlc/x264_r2245.bb | 6 +-
2 files changed, 64 insertions(+), 3 deletions(-)
create mode 100644 recipes/vlc/x264-r2245/uclibc_log2f_fix.HACK.patch
diff --git a/recipes/vlc/x264-r2245/uclibc_log2f_fix.HACK.patch b/recipes/vlc/x264-r2245/uclibc_log2f_fix.HACK.patch
new file mode 100644
index 0000000..874a0ca
--- /dev/null
+++ b/recipes/vlc/x264-r2245/uclibc_log2f_fix.HACK.patch
@@ -0,0 +1,61 @@
+diff -Nur x264-snapshot-20100531-2245.vanilla/encoder/analyse.c x264-snapshot-20100531-2245/encoder/analyse.c
+--- x264-snapshot-20100531-2245.vanilla/encoder/analyse.c 2010-05-31 22:45:11.000000000 +0200
++++ x264-snapshot-20100531-2245/encoder/analyse.c 2010-08-20 02:52:11.505161943 +0200
+@@ -251,7 +251,7 @@
+ for( int i = 0; i <= 2*4*2048; i++ )
+ {
+ h->cost_mv[lambda][-i] =
+- h->cost_mv[lambda][i] = lambda * (log2f(i+1)*2 + 0.718f + !!i) + .5f;
++ h->cost_mv[lambda][i] = lambda * ( (logf(i+1)/logf(2))*2 + 0.718f + !!i) + .5f;
+ }
+ x264_pthread_mutex_lock( &cost_ref_mutex );
+ for( int i = 0; i < 3; i++ )
+diff -Nur x264-snapshot-20100531-2245.vanilla/encoder/encoder.c x264-snapshot-20100531-2245/encoder/encoder.c
+--- x264-snapshot-20100531-2245.vanilla/encoder/encoder.c 2010-05-31 22:45:11.000000000 +0200
++++ x264-snapshot-20100531-2245/encoder/encoder.c 2010-08-20 02:53:58.516661776 +0200
+@@ -479,8 +479,8 @@
+ if( h->param.rc.i_rc_method == X264_RC_CQP )
+ {
+ float qp_p = h->param.rc.i_qp_constant;
+- float qp_i = qp_p - 6*log2f( h->param.rc.f_ip_factor );
+- float qp_b = qp_p + 6*log2f( h->param.rc.f_pb_factor );
++ float qp_i = qp_p - 6*(logf(h->param.rc.f_ip_factor)/logf(2));
++ float qp_b = qp_p + 6*(logf(h->param.rc.f_pb_factor)/logf(2));
+ h->param.rc.i_qp_min = x264_clip3( (int)(X264_MIN3( qp_p, qp_i, qp_b )), 0, 51 );
+ h->param.rc.i_qp_max = x264_clip3( (int)(X264_MAX3( qp_p, qp_i, qp_b ) + .999), 0, 51 );
+ h->param.rc.i_aq_mode = 0;
+diff -Nur x264-snapshot-20100531-2245.vanilla/encoder/ratecontrol.c x264-snapshot-20100531-2245/encoder/ratecontrol.c
+--- x264-snapshot-20100531-2245.vanilla/encoder/ratecontrol.c 2010-05-31 22:45:11.000000000 +0200
++++ x264-snapshot-20100531-2245/encoder/ratecontrol.c 2010-08-20 02:55:26.752661912 +0200
+@@ -549,8 +549,8 @@
+ rc->last_non_b_pict_type = SLICE_TYPE_I;
+ }
+
+- rc->ip_offset = 6.0 * log2f( h->param.rc.f_ip_factor );
+- rc->pb_offset = 6.0 * log2f( h->param.rc.f_pb_factor );
++ rc->ip_offset = 6.0 * (logf( h->param.rc.f_ip_factor )/logf(2));
++ rc->pb_offset = 6.0 * (logf( h->param.rc.f_pb_factor )/logf(2));
+ rc->qp_constant[SLICE_TYPE_P] = h->param.rc.i_qp_constant;
+ rc->qp_constant[SLICE_TYPE_I] = x264_clip3( h->param.rc.i_qp_constant - rc->ip_offset + 0.5, 0, 51 );
+ rc->qp_constant[SLICE_TYPE_B] = x264_clip3( h->param.rc.i_qp_constant + rc->pb_offset + 0.5, 0, 51 );
+@@ -1154,7 +1154,7 @@
+ if( zone->b_force_qp )
+ q += zone->i_qp - rc->qp_constant[SLICE_TYPE_P];
+ else
+- q -= 6*log2f( zone->f_bitrate_factor );
++ q -= 6*(logf( zone->f_bitrate_factor )/logf(2));
+ }
+ }
+
+diff -Nur x264-snapshot-20100531-2245.vanilla/encoder/set.c x264-snapshot-20100531-2245/encoder/set.c
+--- x264-snapshot-20100531-2245.vanilla/encoder/set.c 2010-05-31 22:45:11.000000000 +0200
++++ x264-snapshot-20100531-2245/encoder/set.c 2010-08-20 02:58:19.400661820 +0200
+@@ -234,7 +234,7 @@
+ sps->vui.i_max_bytes_per_pic_denom = 0;
+ sps->vui.i_max_bits_per_mb_denom = 0;
+ sps->vui.i_log2_max_mv_length_horizontal =
+- sps->vui.i_log2_max_mv_length_vertical = (int)log2f( X264_MAX( 1, param->analyse.i_mv_range*4-1 ) ) + 1;
++ sps->vui.i_log2_max_mv_length_vertical = (int)(logf( X264_MAX( 1, param->analyse.i_mv_range*4-1 ))/logf(2)) + 1;
+ }
+ }
+
diff --git a/recipes/vlc/x264_r2245.bb b/recipes/vlc/x264_r2245.bb
index f533bfc..f685c63 100644
--- a/recipes/vlc/x264_r2245.bb
+++ b/recipes/vlc/x264_r2245.bb
@@ -1,10 +1,12 @@
DESCRIPTION = "H.264 encoder"
LICENSE = "GPL"
-PR = "r7"
+PR = "r8"
X264PV = "snapshot-20100531-2245"
SRC_URI = "http://download.videolan.org/pub/videolan/x264/snapshots/x264-${X264PV}.tar.bz2"
+SRC_URI_append_libc-uclibc = "file://uclibc_log2f_fix.HACK.patch"
+
SRC_URI[md5sum] = "d1ccb8122bd418291a9576a2bffdf662"
SRC_URI[sha256sum] = "929e946947701a0b3a336a4b9cfe65daf4c52480f45d4363335ae2a3d5596fa9"
@@ -24,5 +26,3 @@ X264_DISABLE_ASM_x86 = ""
DEPENDS_x86 = "yasm-native"
EXTRA_OECONF = '--enable-shared ${X264_DISABLE_ASM} --extra-cflags="${X264_ECFLAGS}"'
-
-
--
1.7.1
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