return 0;
}
+static void inline downscale_state(JLSState *state, int Q){
+ if(state->N[Q] == state->reset){
+ state->A[Q] >>=1;
+ state->B[Q] >>=1;
+ state->N[Q] >>=1;
+ }
+ state->N[Q]++;
+}
+
+static inline int update_state_regular(JLSState *state, int Q, int err){
+ state->A[Q] += FFABS(err);
+ err *= state->twonear;
+ state->B[Q] += err;
+
+ downscale_state(state, Q);
+
+ if(state->B[Q] <= -state->N[Q]) {
+ state->B[Q] += state->N[Q];
+ if(state->C[Q] > -128)
+ state->C[Q]--;
+ if(state->B[Q] <= -state->N[Q])
+ state->B[Q] = -state->N[Q] + 1;
+ }else if(state->B[Q] > 0){
+ state->B[Q] -= state->N[Q];
+ if(state->C[Q] < 127)
+ state->C[Q]++;
+ if(state->B[Q] > 0)
+ state->B[Q] = 0;
+ }
+
+ return err;
+}
/**
* Get context-dependent Golomb code, decode it and update context
if(!state->near && !k && (2 * state->B[Q] <= -state->N[Q]))
ret = -(ret + 1);
- state->A[Q] += FFABS(ret);
- ret *= state->twonear;
- state->B[Q] += ret;
-
- if(state->N[Q] == state->reset) {
- state->A[Q] >>= 1;
- state->B[Q] >>= 1;
- state->N[Q] >>= 1;
- }
- state->N[Q]++;
-
- if(state->B[Q] <= -state->N[Q]) {
- state->B[Q] += state->N[Q];
- if(state->C[Q] > -128)
- state->C[Q]--;
- if(state->B[Q] <= -state->N[Q])
- state->B[Q] = -state->N[Q] + 1;
- }else if(state->B[Q] > 0){
- state->B[Q] -= state->N[Q];
- if(state->C[Q] < 127)
- state->C[Q]++;
- if(state->B[Q] > 0)
- state->B[Q] = 0;
- }
+ ret= update_state_regular(state, Q, ret);
return ret;
}
/* update state */
state->A[Q] += FFABS(ret) - RItype;
ret *= state->twonear;
- if(state->N[Q] == state->reset){
- state->A[Q] >>=1;
- state->B[Q] >>=1;
- state->N[Q] >>=1;
- }
- state->N[Q]++;
+ downscale_state(state, Q);
return ret;
}
set_ur_golomb_jpegls(pb, val, k, state->limit, state->qbpp);
- state->A[Q] += FFABS(err);
- state->B[Q] += err * state->twonear;
-
- if(state->N[Q] == state->reset) {
- state->A[Q] >>= 1;
- state->B[Q] >>= 1;
- state->N[Q] >>= 1;
- }
- state->N[Q]++;
-
- if(state->B[Q] <= -state->N[Q]) {
- state->B[Q] += state->N[Q];
- if(state->C[Q] > -128)
- state->C[Q]--;
- if(state->B[Q] <= -state->N[Q])
- state->B[Q] = -state->N[Q] + 1;
- }else if(state->B[Q] > 0){
- state->B[Q] -= state->N[Q];
- if(state->C[Q] < 127)
- state->C[Q]++;
- if(state->B[Q] > 0)
- state->B[Q] = 0;
- }
+ update_state_regular(state, Q, err);
}
/**
state->B[Q]++;
state->A[Q] += (val + 1 - RItype) >> 1;
- if(state->N[Q] == state->reset) {
- state->A[Q] >>= 1;
- state->B[Q] >>= 1;
- state->N[Q] >>= 1;
- }
- state->N[Q]++;
+ downscale_state(state, Q);
}
/**