88 void mad_bit_init(struct mad_bitptr *bitptr, unsigned char const *byte)  in mad_bit_init()  argument
90   bitptr->byte  = byte;  in mad_bit_init()
91   bitptr->cache = 0;  in mad_bit_init()
92   bitptr->left  = CHAR_BIT;  in mad_bit_init()
110 unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *bitptr)  in mad_bit_nextbyte()  argument
112   return bitptr->left == CHAR_BIT ? bitptr->byte : bitptr->byte + 1;  in mad_bit_nextbyte()
119 void mad_bit_skip(struct mad_bitptr *bitptr, unsigned int len)  in mad_bit_skip()  argument
121   bitptr->byte += len / CHAR_BIT;  in mad_bit_skip()
122   bitptr->left -= len % CHAR_BIT;  in mad_bit_skip()
124   if (bitptr->left > CHAR_BIT) {  in mad_bit_skip()
125     bitptr->byte++;  in mad_bit_skip()
126     bitptr->left += CHAR_BIT;  in mad_bit_skip()
129   if (bitptr->left < CHAR_BIT)  in mad_bit_skip()
130     bitptr->cache = *bitptr->byte;  in mad_bit_skip()
137 unsigned long mad_bit_read(struct mad_bitptr *bitptr, unsigned int len)  in mad_bit_read()  argument
141   if (bitptr->left == CHAR_BIT)  in mad_bit_read()
142     bitptr->cache = *bitptr->byte;  in mad_bit_read()
144   if (len < bitptr->left) {  in mad_bit_read()
145     value = (bitptr->cache & ((1 << bitptr->left) - 1)) >>  in mad_bit_read()
146       (bitptr->left - len);  in mad_bit_read()
147     bitptr->left -= len;  in mad_bit_read()
154   value = bitptr->cache & ((1 << bitptr->left) - 1);  in mad_bit_read()
155   len  -= bitptr->left;  in mad_bit_read()
157   bitptr->byte++;  in mad_bit_read()
158   bitptr->left = CHAR_BIT;  in mad_bit_read()
163     value = (value << CHAR_BIT) | *bitptr->byte++;  in mad_bit_read()
168     bitptr->cache = *bitptr->byte;  in mad_bit_read()
170     value = (value << len) | (bitptr->cache >> (CHAR_BIT - len));  in mad_bit_read()
171     bitptr->left -= len;  in mad_bit_read()
182 void mad_bit_write(struct mad_bitptr *bitptr, unsigned int len,
187   ptr = (unsigned char *) bitptr->byte;
197 unsigned short mad_bit_crc(struct mad_bitptr bitptr, unsigned int len,  in mad_bit_crc()  argument
205     data = mad_bit_read(&bitptr, 32);  in mad_bit_crc()
215 	    crc_table[((crc >> 8) ^ mad_bit_read(&bitptr, 8)) & 0xff];  in mad_bit_crc()
217 	    crc_table[((crc >> 8) ^ mad_bit_read(&bitptr, 8)) & 0xff];  in mad_bit_crc()
219 	    crc_table[((crc >> 8) ^ mad_bit_read(&bitptr, 8)) & 0xff];  in mad_bit_crc()
229     msb = mad_bit_read(&bitptr, 1) ^ (crc >> 15);  in mad_bit_crc()