The table is only set when f->ac is set to CUSTOM. Setting it for default range coder tables simplifies hardware accelerator code.
Unified · Split
| @@ -104,6 +104,11 @@ int ff_ffv1_read_extra_header(FFV1Context *f) · 103 unmodified lines | ||
| 104 | 104 | if (f->ac == AC_RANGE_CUSTOM_TAB) { |
| 105 | 105 | for (int i = 1; i < 256; i++) |
| 106 | 106 | f->state_transition[i] = ff_ffv1_get_symbol(&c, state, 1) + c.one_state[i]; |
| 107 | + } else { | |
| 108 | + RangeCoder rc; | |
| 109 | + ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8); | |
| 110 | + for (int i = 1; i < 256; i++) | |
| 111 | + f->state_transition[i] = rc.one_state[i]; | |
| 107 | 112 | } |
| 108 | 113 | |
| 109 | 114 | f->colorspace = ff_ffv1_get_symbol(&c, state, 0); //YUV cs type |
| @@ -219,6 +224,11 @@ int ff_ffv1_parse_header(FFV1Context *f, RangeCoder *c, uint8_t *state) · 109 unmodified lines | ||
| 219 | 224 | } |
| 220 | 225 | f->state_transition[i] = st; |
| 221 | 226 | } |
| 227 | + } else { | |
| 228 | + RangeCoder rc; | |
| 229 | + ff_build_rac_states(&rc, 0.05 * (1LL << 32), 256 - 8); | |
| 230 | + for (int i = 1; i < 256; i++) | |
| 231 | + f->state_transition[i] = rc.one_state[i]; | |
| 222 | 232 | } |
| 223 | 233 | |
| 224 | 234 | colorspace = ff_ffv1_get_symbol(c, state, 0); //YUV cs type |