Lines Matching defs:mqc
31 #include "mqc.h"
33 static void byteout(MqcState *mqc)
36 if (*mqc->bp == 0xff){
37 mqc->bp++;
38 *mqc->bp = mqc->c >> 20;
39 mqc->c &= 0xfffff;
40 mqc->ct = 7;
41 } else if ((mqc->c & 0x8000000)){
42 (*mqc->bp)++;
43 mqc->c &= 0x7ffffff;
46 mqc->bp++;
47 *mqc->bp = mqc->c >> 19;
48 mqc->c &= 0x7ffff;
49 mqc->ct = 8;
53 static void renorme(MqcState *mqc)
56 mqc->a += mqc->a;
57 mqc->c += mqc->c;
58 if (!--mqc->ct)
59 byteout(mqc);
60 } while (!(mqc->a & 0x8000));
63 static void setbits(MqcState *mqc)
65 int tmp = mqc->c + mqc->a;
66 mqc->c |= 0xffff;
67 if (mqc->c >= tmp)
68 mqc->c -= 0x8000;
71 void ff_mqc_initenc(MqcState *mqc, uint8_t *bp)
73 ff_mqc_init_contexts(mqc);
74 mqc->a = 0x8000;
75 mqc->c = 0;
76 mqc->bp = bp-1;
77 mqc->bpstart = bp;
78 mqc->ct = 12 + (*mqc->bp == 0xff);
81 void ff_mqc_encode(MqcState *mqc, uint8_t *cxstate, int d)
86 mqc->a -= qe;
88 if (!(mqc->a & 0x8000)){
89 if (mqc->a < qe)
90 mqc->a = qe;
92 mqc->c += qe;
94 renorme(mqc);
96 mqc->c += qe;
98 if (mqc->a < qe)
99 mqc->c += qe;
101 mqc->a = qe;
103 renorme(mqc);
107 static int mqc_flush(MqcState *mqc)
109 setbits(mqc);
110 mqc->c = mqc->c << mqc->ct;
111 byteout(mqc);
112 mqc->c = mqc->c << mqc->ct;
113 byteout(mqc);
114 if (*mqc->bp != 0xff)
115 mqc->bp++;
116 return mqc->bp - mqc->bpstart;
119 int ff_mqc_flush_to(MqcState *mqc, uint8_t *dst, int *dst_len)
121 MqcState mqc2 = *mqc;
124 *mqc2.bp = *mqc->bp;
127 if (mqc->bp < mqc->bpstart) {
128 av_assert1(mqc->bpstart - mqc->bp == 1);
130 av_assert1(mqc->bp[0] == 0 && dst[0] == 0);
133 return mqc->bp - mqc->bpstart + 1 + *dst_len;
135 return mqc->bp - mqc->bpstart + *dst_len;