Fix valgrind and asan memory leaks and crashes.

chromium/patches/to_upstream/01_static_pthread_O2.patch

-diff -wurp -N orig/configure ffmpeg/configure
---- orig/configure      2011-07-12 20:46:31.912987236 -0700
-+++ ffmpeg/configure    2011-07-12 20:46:32.033313125 -0700
-@@ -1946,7 +1946,7 @@ elif $cc -v 2>&1 | grep -qi ^gcc; then
-         CC_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
-         AS_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
-     fi
--    speed_cflags='-O3'
-+    speed_cflags='-O2'
-     size_cflags='-Os'
- elif $cc --version 2>/dev/null | grep -q Intel; then
-     cc_type=icc
-@@ -2098,6 +2098,7 @@ elif $cc -v 2>&1 | grep -q Open64; then
-     cc_ident=$($cc -v 2>&1 | head -n1 | tr -d :)
-     CC_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
-     AS_DEPFLAGS='-MMD -MF $(@:.o=.d) -MT $@'
-+# O2 produces smaller/faster code on P4 and same performance on Core/Atom.
-     speed_cflags='-O2'
-     size_cflags='-Os'
-     filter_cflags='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
-@@ -2852,6 +2853,10 @@ if ! disabled pthreads && ! enabled w32t
-         add_extralibs -pthreads
-     elif check_func pthread_create -lpthreadGC2; then
-         add_extralibs -lpthreadGC2
-+# static pthreads improves startup time
-+    elif check_func pthread_create -lpthreadGC2 -lws2_32; then
-+        add_cflags -DPTW32_STATIC_LIB
-+        add_extralibs -lpthreadGC2 -lws2_32
-     elif ! check_lib pthread.h pthread_create -lpthread; then
-         disable pthreads
-     fi
-@@ -3085,7 +3090,8 @@ elif enabled ccc; then
- elif enabled gcc; then
-     check_cflags -fno-tree-vectorize
-     check_cflags -Werror=implicit-function-declaration
--    check_cflags -Werror=missing-prototypes
-+# Removed to allow msys gcc 4.2.1-sjlj to compile
-+#   check_cflags -Werror=missing-prototypes
- elif enabled llvm_gcc; then
-     check_cflags -mllvm -stack-alignment=16
- elif enabled clang; then
-diff -wurp -N orig/libavcodec/allcodecs.c ffmpeg/libavcodec/allcodecs.c
---- orig/libavcodec/allcodecs.c 2011-07-12 20:46:31.952992143 -0700
-+++ ffmpeg/libavcodec/allcodecs.c       2011-07-12 20:46:32.033313125 -0700
-@@ -45,6 +45,15 @@
-           extern AVBitStreamFilter ff_##x##_bsf; \
-           if(CONFIG_##X##_BSF)     av_register_bitstream_filter(&ff_##x##_bsf); }
- 
-+#ifdef PTW32_STATIC_LIB
-+#include "pthread.h"
-+static void detach_ptw32(void)
-+{
-+    pthread_win32_thread_detach_np();
-+    pthread_win32_process_detach_np();
-+}
-+#endif
-+
- void avcodec_register_all(void)
- {
-     static int initialized;
-@@ -53,6 +62,11 @@ void avcodec_register_all(void)
-         return;
-     initialized = 1;
- 
-+#ifdef PTW32_STATIC_LIB
-+    pthread_win32_process_attach_np();
-+    pthread_win32_thread_attach_np();
-+    atexit(detach_ptw32);
-+#endif
-     /* hardware accelerators */
-     REGISTER_HWACCEL (H263_VAAPI, h263_vaapi);
-     REGISTER_HWACCEL (H264_DXVA2, h264_dxva2);