Lines Matching defs:mqc
28 #include "mqc.h"
30 static void bytein(MqcState *mqc)
32 if (*mqc->bp == 0xff) {
33 if (*(mqc->bp + 1) > 0x8f)
34 mqc->c++;
36 mqc->bp++;
37 mqc->c += 2 + 0xfe00 - (*mqc->bp << 9);
40 mqc->bp++;
41 mqc->c += 1 + 0xff00 - (*mqc->bp << 8);
45 static int exchange(MqcState *mqc, uint8_t *cxstate, int lps)
48 if ((mqc->a < ff_mqc_qe[*cxstate]) ^ (!lps)) {
50 mqc->a = ff_mqc_qe[*cxstate];
55 mqc->a = ff_mqc_qe[*cxstate];
61 if (!(mqc->c & 0xff)) {
62 mqc->c -= 0x100;
63 bytein(mqc);
65 mqc->a += mqc->a;
66 mqc->c += mqc->c;
67 } while (!(mqc->a & 0x8000));
71 void ff_mqc_initdec(MqcState *mqc, uint8_t *bp)
73 ff_mqc_init_contexts(mqc);
74 mqc->bp = bp;
75 mqc->c = (*mqc->bp ^ 0xff) << 16;
76 bytein(mqc);
77 mqc->c = mqc->c << 7;
78 mqc->a = 0x8000;
81 int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate)
83 mqc->a -= ff_mqc_qe[*cxstate];
84 if ((mqc->c >> 16) < mqc->a) {
85 if (mqc->a & 0x8000)
88 return exchange(mqc, cxstate, 0);
90 mqc->c -= mqc->a << 16;
91 return exchange(mqc, cxstate, 1);