Lines Matching defs:mqc
28 #include "mqc.h"
30 static void byteout(MqcState *mqc)
33 if (*mqc->bp == 0xff){
34 mqc->bp++;
35 *mqc->bp = mqc->c >> 20;
36 mqc->c &= 0xfffff;
37 mqc->ct = 7;
38 } else if ((mqc->c & 0x8000000)){
39 (*mqc->bp)++;
40 mqc->c &= 0x7ffffff;
43 mqc->bp++;
44 *mqc->bp = mqc->c >> 19;
45 mqc->c &= 0x7ffff;
46 mqc->ct = 8;
50 static void renorme(MqcState *mqc)
53 mqc->a += mqc->a;
54 mqc->c += mqc->c;
55 if (!--mqc->ct)
56 byteout(mqc);
57 } while (!(mqc->a & 0x8000));
60 static void setbits(MqcState *mqc)
62 int tmp = mqc->c + mqc->a;
63 mqc->c |= 0xffff;
64 if (mqc->c >= tmp)
65 mqc->c -= 0x8000;
68 void ff_mqc_initenc(MqcState *mqc, uint8_t *bp)
70 ff_mqc_init_contexts(mqc);
71 mqc->a = 0x8000;
72 mqc->c = 0;
73 mqc->bp = bp-1;
74 mqc->bpstart = bp;
75 mqc->ct = 12 + (*mqc->bp == 0xff);
78 void ff_mqc_encode(MqcState *mqc, uint8_t *cxstate, int d)
83 mqc->a -= qe;
85 if (!(mqc->a & 0x8000)){
86 if (mqc->a < qe)
87 mqc->a = qe;
89 mqc->c += qe;
91 renorme(mqc);
93 mqc->c += qe;
95 if (mqc->a < qe)
96 mqc->c += qe;
98 mqc->a = qe;
100 renorme(mqc);
104 int ff_mqc_length(MqcState *mqc)
106 return mqc->bp - mqc->bpstart;
109 int ff_mqc_flush(MqcState *mqc)
111 setbits(mqc);
112 mqc->c = mqc->c << mqc->ct;
113 byteout(mqc);
114 mqc->c = mqc->c << mqc->ct;
115 byteout(mqc);
116 if (*mqc->bp != 0xff)
117 mqc->bp++;
118 return mqc->bp - mqc->bpstart;