static const uint8_t * const ff_h264_mlps_state = ff_h264_cabac_tables + H264_MLPS_STATE_OFFSET;
static const uint8_t * const ff_h264_last_coeff_flag_offset_8x8 = ff_h264_cabac_tables + H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET;
+#if !defined(get_cabac_bypass) || !defined(get_cabac_terminate)
static void refill(CABACContext *c){
#if CABAC_BITS == 16
c->low+= (c->bytestream[0]<<9) + (c->bytestream[1]<<1);
#endif
c->bytestream += CABAC_BITS / 8;
}
+#endif
+#ifndef get_cabac_terminate
static inline void renorm_cabac_decoder_once(CABACContext *c){
int shift= (uint32_t)(c->range - 0x100)>>31;
c->range<<= shift;
if(!(c->low & CABAC_MASK))
refill(c);
}
+#endif
#ifndef get_cabac_inline
static void refill2(CABACContext *c){
int i;
unsigned x;
-
+#if !HAVE_FAST_CLZ
x= c->low ^ (c->low-1);
i= 7 - ff_h264_norm_shift[x>>(CABAC_BITS-1)];
+#else
+ i = ff_ctz(c->low) - CABAC_BITS;
+#endif
x= -CABAC_MASK;
#endif
c->bytestream += CABAC_BITS/8;
}
+#endif
+#ifndef get_cabac_inline
static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const state){
int s = *state;
int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + s];
*
* @return the number of bytes read or 0 if no end
*/
+#ifndef get_cabac_terminate
static int av_unused get_cabac_terminate(CABACContext *c){
c->range -= 2;
if(c->low < c->range<<(CABAC_BITS+1)){
return c->bytestream - c->bytestream_start;
}
}
+#endif
/**
* Skip @p n bytes and reset the decoder.
* @return the address of the first skipped byte or NULL if there's less than @p n bytes left
*/
+#ifndef skip_bytes
static av_unused const uint8_t* skip_bytes(CABACContext *c, int n) {
const uint8_t *ptr = c->bytestream;
return ptr;
}
+#endif
#endif /* AVCODEC_CABAC_FUNCTIONS_H */