X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fbitstream.h;h=f48f1ee944d74651b08c661b2d52bde0c1f46552;hb=3143f13345e4a206dc03491255116a1eb8119ae0;hp=fd1b4a94f88694b7bc271f7f9e1a1f5ba32c60ff;hpb=98f7b56bb6562db841219a42ea4e15d43a835c93;p=ffmpeg

diff --git a/libavcodec/bitstream.h b/libavcodec/bitstream.h
index fd1b4a94f88..f48f1ee944d 100644
--- a/libavcodec/bitstream.h
+++ b/libavcodec/bitstream.h
@@ -23,18 +23,19 @@
  * bitstream api header.
  */
 
-#ifndef BITSTREAM_H
-#define BITSTREAM_H
+#ifndef FFMPEG_BITSTREAM_H
+#define FFMPEG_BITSTREAM_H
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <assert.h>
-#include "common.h"
-#include "bswap.h"
-#include "log.h"
+#include "libavutil/bswap.h"
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/log.h"
 
 #if defined(ALT_BITSTREAM_READER_LE) && !defined(ALT_BITSTREAM_READER)
-#define ALT_BITSTREAM_READER
+#   define ALT_BITSTREAM_READER
 #endif
 
 //#define ALT_BITSTREAM_WRITER
@@ -43,12 +44,11 @@
 #   ifdef ARCH_ARMV4L
 #       define A32_BITSTREAM_READER
 #   else
-#define ALT_BITSTREAM_READER
+#       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];
 
@@ -136,8 +136,8 @@ static inline void flush_put_bits(PutBitContext *s)
 }
 
 void align_put_bits(PutBitContext *s);
-void ff_put_string(PutBitContext * pbc, char *s, int put_zero);
-void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
+void ff_put_string(PutBitContext * pbc, const char *s, int put_zero);
+void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length);
 
 /* bit input */
 /* buffer, buffer_end and size_in_bits must be present and used by every reader */
@@ -176,38 +176,6 @@ typedef struct RL_VLC_ELEM {
 #define UNALIGNED_STORES_ARE_BAD
 #endif
 
-/* used to avoid missaligned exceptions on some archs (alpha, ...) */
-#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))
-#else
-#    ifdef __GNUC__
-#    define unaligned(x)                                \
-static inline uint##x##_t unaligned##x(const void *v) { \
-    struct Unaligned {                                  \
-        uint##x##_t i;                                  \
-    } __attribute__((packed));                          \
-                                                        \
-    return ((const struct Unaligned *) v)->i;           \
-}
-#    elif defined(__DECC)
-#    define unaligned(x)                                        \
-static inline uint##x##_t unaligned##x(const void *v) {         \
-    return *(const __unaligned uint##x##_t *) v;                \
-}
-#    else
-#    define unaligned(x)                                        \
-static inline uint##x##_t unaligned##x(const void *v) {         \
-    return *(const uint##x##_t *) v;                            \
-}
-#    endif
-unaligned(16)
-unaligned(32)
-unaligned(64)
-#undef unaligned
-#endif /* defined(ARCH_X86) */
-
 #ifndef ALT_BITSTREAM_WRITER
 static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 {
@@ -315,6 +283,13 @@ static inline void put_bits(PutBitContext *s, int n, unsigned int value)
 }
 #endif
 
+static inline void put_sbits(PutBitContext *pb, int bits, int32_t val)
+{
+    assert(bits >= 0 && bits <= 31);
+
+    put_bits(pb, bits, val & ((1<<bits)-1));
+}
+
 
 static inline uint8_t* pbBufPtr(PutBitContext *s)
 {
@@ -406,26 +381,6 @@ LAST_SKIP_BITS(name, gb, num)
 for examples see get_bits, show_bits, skip_bits, get_vlc
 */
 
-static inline int unaligned32_be(const void *v)
-{
-#ifdef CONFIG_ALIGN
-        const uint8_t *p=v;
-        return (((p[0]<<8) | p[1])<<16) | (p[2]<<8) | (p[3]);
-#else
-        return be2me_32( unaligned32(v)); //original
-#endif
-}
-
-static inline int unaligned32_le(const void *v)
-{
-#ifdef CONFIG_ALIGN
-       const uint8_t *p=v;
-       return (((p[3]<<8) | p[2])<<16) | (p[1]<<8) | (p[0]);
-#else
-       return le2me_32( unaligned32(v)); //original
-#endif
-}
-
 #ifdef ALT_BITSTREAM_READER
 #   define MIN_CACHE_BITS 25
 
@@ -438,13 +393,13 @@ static inline int unaligned32_le(const void *v)
 
 # ifdef ALT_BITSTREAM_READER_LE
 #   define UPDATE_CACHE(name, gb)\
-        name##_cache= unaligned32_le( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) >> (name##_index&0x07);\
+        name##_cache= AV_RL32( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) >> (name##_index&0x07);\
 
 #   define SKIP_CACHE(name, gb, num)\
         name##_cache >>= (num);
 # else
 #   define UPDATE_CACHE(name, gb)\
-        name##_cache= unaligned32_be( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) << (name##_index&0x07);\
+        name##_cache= AV_RB32( ((const uint8_t *)(gb)->buffer)+(name##_index>>3) ) << (name##_index&0x07);\
 
 #   define SKIP_CACHE(name, gb, num)\
         name##_cache <<= (num);
@@ -503,26 +458,13 @@ static inline void skip_bits_long(GetBitContext *s, int n){
         (gb)->cache= name##_cache;\
         (gb)->buffer_ptr= name##_buffer_ptr;\
 
-#ifdef LIBMPEG2_BITSTREAM_READER_HACK
-
 #   define UPDATE_CACHE(name, gb)\
     if(name##_bit_count >= 0){\
-        name##_cache+= (int)be2me_16(*(uint16_t*)name##_buffer_ptr) << name##_bit_count;\
-        name##_buffer_ptr += 2;\
-        name##_bit_count-= 16;\
-    }\
-
-#else
-
-#   define UPDATE_CACHE(name, gb)\
-    if(name##_bit_count >= 0){\
-        name##_cache+= ((name##_buffer_ptr[0]<<8) + name##_buffer_ptr[1]) << name##_bit_count;\
+        name##_cache+= AV_RB16(name##_buffer_ptr) << name##_bit_count; \
         name##_buffer_ptr+=2;\
         name##_bit_count-= 16;\
     }\
 
-#endif
-
 #   define SKIP_CACHE(name, gb, num)\
         name##_cache <<= (num);\
 
@@ -819,10 +761,20 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
              const void *codes, int codes_wrap, int codes_size,
              const void *symbols, int symbols_wrap, int symbols_size,
              int flags);
-#define INIT_VLC_USE_STATIC 1
+#define INIT_VLC_USE_STATIC 1 ///< VERY strongly deprecated and forbidden
 #define INIT_VLC_LE         2
+#define INIT_VLC_USE_NEW_STATIC 4
 void free_vlc(VLC *vlc);
 
+#define INIT_VLC_STATIC(vlc, bits, a,b,c,d,e,f,g, static_size)\
+{\
+    static VLC_TYPE table[static_size][2];\
+    (vlc)->table= table;\
+    (vlc)->table_allocated= static_size;\
+    init_vlc(vlc, bits, a,b,c,d,e,f,g, INIT_VLC_USE_NEW_STATIC);\
+}
+
+
 /**
  *
  * if the vlc code is invalid and max_depth=1 than no bits will be removed
@@ -969,4 +921,11 @@ static inline int decode012(GetBitContext *gb){
         return get_bits1(gb) + 1;
 }
 
-#endif /* BITSTREAM_H */
+static inline int decode210(GetBitContext *gb){
+    if (get_bits1(gb))
+        return 0;
+    else
+        return 2 - get_bits1(gb);
+}
+
+#endif /* FFMPEG_BITSTREAM_H */