// copes better with quantization, and calculates the
// actual whitened result as it goes.
-static int modified_levinson_durbin(int *window, int window_entries,
+static void modified_levinson_durbin(int *window, int window_entries,
int *out, int out_entries, int channels, int *tap_quant)
{
int i;
- int *state = av_calloc(window_entries, sizeof(*state));
-
- if (!state)
- return AVERROR(ENOMEM);
+ int *state = window + window_entries;
memcpy(state, window, window_entries * sizeof(*state));
}
#endif
}
-
- av_free(state);
- return 0;
}
static inline int code_samplerate(int samplerate)
s->int_samples = av_calloc(s->frame_size, sizeof(*s->int_samples));
s->window_size = ((2*s->tail_size)+s->frame_size);
- s->window = av_calloc(s->window_size, sizeof(*s->window));
+ s->window = av_calloc(s->window_size, 2 * sizeof(*s->window));
if (!s->window || !s->int_samples)
return AVERROR(ENOMEM);
s->tail[i] = s->int_samples[s->frame_size - s->tail_size + i];
// generate taps
- ret = modified_levinson_durbin(s->window, s->window_size,
+ modified_levinson_durbin(s->window, s->window_size,
s->predictor_k, s->num_taps, s->channels, s->tap_quant);
- if (ret < 0)
- return ret;
if ((ret = intlist_write(&c, state, s->predictor_k, s->num_taps, 0)) < 0)
return ret;