1 files changed, 119 insertions, 42 deletions

diff --git a/src/libffmpeg/libavcodec/bitstream.h b/src/libffmpeg/libavcodec/bitstream.h
index 10db64d33..af25b6dcf 100644
--- a/src/libffmpeg/libavcodec/bitstream.h
+++ b/src/libffmpeg/libavcodec/bitstream.h
@@ -1,3 +1,23 @@
+/*
+ * copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
 /**
  * @file bitstream.h
  * bitstream api header.
@@ -6,17 +26,28 @@
 #ifndef BITSTREAM_H
 #define BITSTREAM_H
 
+#include "log.h"
+
+#if defined(ALT_BITSTREAM_READER_LE) && !defined(ALT_BITSTREAM_READER)
+#define ALT_BITSTREAM_READER
+#endif
+
 //#define ALT_BITSTREAM_WRITER
 //#define ALIGNED_BITSTREAM_WRITER
-
+#if !defined(LIBMPEG2_BITSTREAM_READER) && !defined(A32_BITSTREAM_READER) && !defined(ALT_BITSTREAM_READER)
+#   ifdef ARCH_ARMV4L
+#       define A32_BITSTREAM_READER
+#   else
 #define ALT_BITSTREAM_READER
 //#define LIBMPEG2_BITSTREAM_READER
 //#define A32_BITSTREAM_READER
+#   endif
+#endif
 #define LIBMPEG2_BITSTREAM_READER_HACK //add BERO
 
 extern const uint8_t ff_reverse[256];
 
-#if defined(ARCH_X86) || defined(ARCH_X86_64)
+#if defined(ARCH_X86)
 // avoid +32 for shift optimization (gcc should do that ...)
 static inline  int32_t NEG_SSR32( int32_t a, int8_t s){
     asm ("sarl %1, %0\n\t"
@@ -140,7 +171,7 @@ typedef struct RL_VLC_ELEM {
 #endif
 
 /* used to avoid missaligned exceptions on some archs (alpha, ...) */
-#if defined(ARCH_X86) || defined(ARCH_X86_64)
+#if defined(ARCH_X86)
 #    define unaligned16(a) (*(const uint16_t*)(a))
 #    define unaligned32(a) (*(const uint32_t*)(a))
 #    define unaligned64(a) (*(const uint64_t*)(a))
@@ -169,7 +200,7 @@ unaligned(16)
 unaligned(32)
 unaligned(64)
 #undef unaligned
-#endif //!ARCH_X86
+#endif /* defined(ARCH_X86) */
 
 #ifndef ALT_BITSTREAM_WRITER
 static inline void put_bits(PutBitContext *s, int n, unsigned int value)
@@ -216,7 +247,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 {
 #    ifdef ALIGNED_BITSTREAM_WRITER
-#        if defined(ARCH_X86) || defined(ARCH_X86_64)
+#        if defined(ARCH_X86)
     asm volatile(
         "movl %0, %%ecx                 \n\t"
         "xorl %%eax, %%eax              \n\t"
@@ -247,7 +278,7 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
     s->index= index;
 #        endif
 #    else //ALIGNED_BITSTREAM_WRITER
-#        if defined(ARCH_X86) || defined(ARCH_X86_64)
+#        if defined(ARCH_X86)
     asm volatile(
         "movl $7, %%ecx                 \n\t"
         "andl %0, %%ecx                 \n\t"
@@ -429,13 +460,16 @@ static inline int unaligned32_le(const void *v)
 # ifdef ALT_BITSTREAM_READER_LE
 #   define SHOW_UBITS(name, gb, num)\
         ((name##_cache) & (NEG_USR32(0xffffffff,num)))
+
+#   define SHOW_SBITS(name, gb, num)\
+        NEG_SSR32((name##_cache)<<(32-(num)), num)
 # else
 #   define SHOW_UBITS(name, gb, num)\
         NEG_USR32(name##_cache, num)
-# endif
 
 #   define SHOW_SBITS(name, gb, num)\
         NEG_SSR32(name##_cache, num)
+# endif
 
 #   define GET_CACHE(name, gb)\
         ((uint32_t)name##_cache)
@@ -443,6 +477,11 @@ static inline int unaligned32_le(const void *v)
 static inline int get_bits_count(GetBitContext *s){
     return s->index;
 }
+
+static inline void skip_bits_long(GetBitContext *s, int n){
+    s->index += n;
+}
+
 #elif defined LIBMPEG2_BITSTREAM_READER
 //libmpeg2 like reader
 
@@ -506,6 +545,16 @@ static inline int get_bits_count(GetBitContext *s){
     return (s->buffer_ptr - s->buffer)*8 - 16 + s->bit_count;
 }
 
+static inline void skip_bits_long(GetBitContext *s, int n){
+    OPEN_READER(re, s)
+    re_bit_count += n;
+    re_buffer_ptr += 2*(re_bit_count>>4);
+    re_bit_count &= 15;
+    re_cache = ((re_buffer_ptr[-2]<<8) + re_buffer_ptr[-1]) << (16+re_bit_count);
+    UPDATE_CACHE(re, s)
+    CLOSE_READER(re, s)
+}
+
 #elif defined A32_BITSTREAM_READER
 
 #   define MIN_CACHE_BITS 32
@@ -531,13 +580,13 @@ static inline int get_bits_count(GetBitContext *s){
         name##_bit_count-= 32;\
     }\
 
-#if defined(ARCH_X86) || defined(ARCH_X86_64)
+#if defined(ARCH_X86)
 #   define SKIP_CACHE(name, gb, num)\
         asm(\
             "shldl %2, %1, %0          \n\t"\
             "shll %2, %1               \n\t"\
             : "+r" (name##_cache0), "+r" (name##_cache1)\
-            : "Ic" ((uint8_t)num)\
+            : "Ic" ((uint8_t)(num))\
            );
 #else
 #   define SKIP_CACHE(name, gb, num)\
@@ -571,6 +620,17 @@ static inline int get_bits_count(GetBitContext *s){
     return ((uint8_t*)s->buffer_ptr - s->buffer)*8 - 32 + s->bit_count;
 }
 
+static inline void skip_bits_long(GetBitContext *s, int n){
+    OPEN_READER(re, s)
+    re_bit_count += n;
+    re_buffer_ptr += re_bit_count>>5;
+    re_bit_count &= 31;
+    re_cache0 = be2me_32( re_buffer_ptr[-1] ) << re_bit_count;
+    re_cache1 = 0;
+    UPDATE_CACHE(re, s)
+    CLOSE_READER(re, s)
+}
+
 #endif
 
 /**
@@ -615,8 +675,6 @@ static inline unsigned int get_bits(GetBitContext *s, int n){
     return tmp;
 }
 
-unsigned int get_bits_long(GetBitContext *s, int n);
-
 /**
  * shows 0-17 bits.
  * Note, the alt bitstream reader can read up to 25 bits, but the libmpeg2 reader can't
@@ -630,8 +688,6 @@ static inline unsigned int show_bits(GetBitContext *s, int n){
     return tmp;
 }
 
-unsigned int show_bits_long(GetBitContext *s, int n);
-
 static inline void skip_bits(GetBitContext *s, int n){
  //Note gcc seems to optimize this to s->index+=n for the ALT_READER :))
     OPEN_READER(re, s)
@@ -669,6 +725,44 @@ static inline void skip_bits1(GetBitContext *s){
 }
 
 /**
+ * reads 0-32 bits.
+ */
+static inline unsigned int get_bits_long(GetBitContext *s, int n){
+    if(n<=17) return get_bits(s, n);
+    else{
+#ifdef ALT_BITSTREAM_READER_LE
+        int ret= get_bits(s, 16);
+        return ret | (get_bits(s, n-16) << 16);
+#else
+        int ret= get_bits(s, 16) << (n-16);
+        return ret | get_bits(s, n-16);
+#endif
+    }
+}
+
+/**
+ * shows 0-32 bits.
+ */
+static inline unsigned int show_bits_long(GetBitContext *s, int n){
+    if(n<=17) return show_bits(s, n);
+    else{
+        GetBitContext gb= *s;
+        int ret= get_bits_long(s, n);
+        *s= gb;
+        return ret;
+    }
+}
+
+static inline int check_marker(GetBitContext *s, const char *msg)
+{
+    int bit= get_bits1(s);
+    if(!bit)
+        av_log(NULL, AV_LOG_INFO, "Marker bit missing %s\n", msg);
+
+    return bit;
+}
+
+/**
  * init GetBitContext.
  * @param buffer bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE bytes larger then the actual read bits
  * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
@@ -689,38 +783,22 @@ static inline void init_get_bits(GetBitContext *s,
 #ifdef ALT_BITSTREAM_READER
     s->index=0;
 #elif defined LIBMPEG2_BITSTREAM_READER
-#ifdef LIBMPEG2_BITSTREAM_READER_HACK
-  if ((int)buffer&1) {
-     /* word alignment */
-    s->cache = (*buffer++)<<24;
-    s->buffer_ptr = buffer;
-    s->bit_count = 16-8;
-  } else
-#endif
-  {
-    s->buffer_ptr = buffer;
-    s->bit_count = 16;
-    s->cache = 0;
-  }
+    s->buffer_ptr = (uint8_t*)((intptr_t)buffer&(~1));
+    s->bit_count = 16 + 8*((intptr_t)buffer&1);
+    skip_bits_long(s, 0);
 #elif defined A32_BITSTREAM_READER
-    s->buffer_ptr = (uint32_t*)buffer;
-    s->bit_count = 32;
-    s->cache0 = 0;
-    s->cache1 = 0;
-#endif
-    {
-        OPEN_READER(re, s)
-        UPDATE_CACHE(re, s)
-        UPDATE_CACHE(re, s)
-        CLOSE_READER(re, s)
-    }
-#ifdef A32_BITSTREAM_READER
-    s->cache1 = 0;
+    s->buffer_ptr = (uint32_t*)((intptr_t)buffer&(~3));
+    s->bit_count = 32 + 8*((intptr_t)buffer&3);
+    skip_bits_long(s, 0);
 #endif
 }
 
-int check_marker(GetBitContext *s, const char *msg);
-void align_get_bits(GetBitContext *s);
+static inline void align_get_bits(GetBitContext *s)
+{
+    int n= (-get_bits_count(s)) & 7;
+    if(n) skip_bits(s, n);
+}
+
 int init_vlc(VLC *vlc, int nb_bits, int nb_codes,
              const void *bits, int bits_wrap, int bits_size,
              const void *codes, int codes_wrap, int codes_size,
@@ -816,7 +894,6 @@ static always_inline int get_vlc2(GetBitContext *s, VLC_TYPE (*table)[2],
 //#define TRACE
 
 #ifdef TRACE
-#include "avcodec.h"
 static inline void print_bin(int bits, int n){
     int i;