46 void vpx_init_range_decoder(VpxRangeCoder *c, const uint8_t *buf, int buf_size)  in vpx_init_range_decoder()  argument
48     c->high = 255;  in vpx_init_range_decoder()
49     c->bits = -16;  in vpx_init_range_decoder()
50     c->buffer = buf;  in vpx_init_range_decoder()
51     c->end = buf + buf_size;  in vpx_init_range_decoder()
52     c->code_word = bytestream_get_be24(&c->buffer);  in vpx_init_range_decoder()
55 unsigned int vpx_rac_renorm(VpxRangeCoder *c)  in vpx_rac_renorm()  argument
57     int shift = vpx_norm_shift[c->high];  in vpx_rac_renorm()
58     int bits = c->bits;  in vpx_rac_renorm()
59     unsigned int code_word = c->code_word;  in vpx_rac_renorm()
61     c->high   <<= shift;  in vpx_rac_renorm()
64     if (bits >= 0 && c->buffer < c->end) {  in vpx_rac_renorm()
65         code_word |= bytestream_get_be16(&c->buffer) << bits;  in vpx_rac_renorm()
68     c->bits = bits;  in vpx_rac_renorm()
72 int vpx_rac_get_prob(VpxRangeCoder *c, uint8_t prob)  in vpx_rac_get_prob()  argument
74     unsigned int code_word = vpx_rac_renorm(c);  in vpx_rac_get_prob()
75     unsigned int low = 1 + (((c->high - 1) * prob) >> 8);  in vpx_rac_get_prob()
79     c->high = bit ? c->high - low : low;  in vpx_rac_get_prob()
80     c->code_word = bit ? code_word - low_shift : code_word;  in vpx_rac_get_prob()
86 int vpx_rac_get_prob_branchy(VpxRangeCoder *c, int prob)  in vpx_rac_get_prob_branchy()  argument
88     unsigned long code_word = vpx_rac_renorm(c);  in vpx_rac_get_prob_branchy()
89     unsigned low = 1 + (((c->high - 1) * prob) >> 8);  in vpx_rac_get_prob_branchy()
93         c->high     -= low;  in vpx_rac_get_prob_branchy()
94         c->code_word = code_word - low_shift;  in vpx_rac_get_prob_branchy()
98     c->high = low;  in vpx_rac_get_prob_branchy()
99     c->code_word = code_word;  in vpx_rac_get_prob_branchy()
104 int vpx_rac_get(VpxRangeCoder *c)  in vpx_rac_get()  argument
106     return vpx_rac_get_prob(c, 128);  in vpx_rac_get()
109 int vpx_rac_get_uint(VpxRangeCoder *c, int bits)  in vpx_rac_get_uint()  argument
114         value = (value << 1) | vpx_rac_get(c);  in vpx_rac_get_uint()