* ffmpeg update to 51.28.0

  * Workaround ffmpeg buggy codecs that don't release their DR1 frames.
  * Fix several segfaults and freezing problem with H264 streams that use a lot
    of reference frames (eg. 15)
  * Initial support to enable/disable ffmpeg codecs. Codecs may be disabled in
    groups by --disable-ffmpeg-uncommon-codecs/--disable-ffmpeg-popular-codecs
    Think of "uncommon" codecs what people would never want to play with their
    PDAs (they will save memory by removing them).
    Note: currently both uncommon/popular codecs are _build_ but disabled.
    that is, build system still need some improvements to really save memory.
warning: non-autoconf guru playing with the build system, likely breakage.

CVS patchset: 8499
CVS date: 2007/01/13 21:19:52

1 files changed, 49 insertions, 0 deletions

diff --git a/src/libffmpeg/libavcodec/armv4l/mathops.h b/src/libffmpeg/libavcodec/armv4l/mathops.h
new file mode 100644
index 000000000..7ddd0ec6e
--- /dev/null
+++ b/src/libffmpeg/libavcodec/armv4l/mathops.h
@@ -0,0 +1,49 @@
+/*
+ * simple math operations
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifdef FRAC_BITS
+#   define MULL(a, b) \
+        ({  int lo, hi;\
+         asm("smull %0, %1, %2, %3     \n\t"\
+             "mov   %0, %0,     lsr %4\n\t"\
+             "add   %1, %0, %1, lsl %5\n\t"\
+             : "=&r"(lo), "=&r"(hi)\
+             : "r"(b), "r"(a), "i"(FRAC_BITS), "i"(32-FRAC_BITS));\
+         hi; })
+#endif
+
+#define MULH(a, b) \
+    ({ int lo, hi;\
+     asm ("smull %0, %1, %2, %3" : "=&r"(lo), "=&r"(hi) : "r"(b), "r"(a));\
+     hi; })
+
+#if defined(HAVE_ARMV5TE)
+
+/* signed 16x16 -> 32 multiply add accumulate */
+#   define MAC16(rt, ra, rb) \
+        asm ("smlabb %0, %2, %3, %0" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
+/* signed 16x16 -> 32 multiply */
+#   define MUL16(ra, rb)                                                \
+        ({ int __rt;                                                    \
+         asm ("smulbb %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb));  \
+         __rt; })
+
+#endif