* 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 "intreadwrite.h"
#include "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
#define UNALIGNED_STORES_ARE_BAD
#endif
-/* used to avoid missaligned exceptions on some archs (alpha, ...) */
+/* used to avoid misaligned exceptions on some archs (alpha, ...) */
#if defined(ARCH_X86)
# define unaligned16(a) (*(const uint16_t*)(a))
# define unaligned32(a) (*(const uint32_t*)(a))
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);
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 */