* 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
# 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];
}
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 */
#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)
{
}
#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)
{
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
# 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);
(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);\
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
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 */