- s->ac3dsp.float_to_fixed24(s->fixed_coef_buffer, s->mdct_coef_buffer,
- AC3_MAX_COEFS * AC3_MAX_BLOCKS * s->channels);
+ int chan_size = AC3_MAX_COEFS * s->num_blocks;
+ int cpl = s->cpl_on;
+ s->ac3dsp.float_to_fixed24(s->fixed_coef_buffer + (chan_size * !cpl),
+ s->mdct_coef_buffer + (chan_size * !cpl),
+ chan_size * (s->channels + cpl));
+}
+
+
+/*
+ * Clip MDCT coefficients to allowable range.
+ */
+static void clip_coefficients(DSPContext *dsp, float *coef, unsigned int len)
+{
+ dsp->vector_clipf(coef, coef, COEF_MIN, COEF_MAX, len);
+}
+
+
+/*
+ * Calculate a single coupling coordinate.
+ */
+static CoefType calc_cpl_coord(CoefSumType energy_ch, CoefSumType energy_cpl)
+{
+ float coord = 0.125;
+ if (energy_cpl > 0)
+ coord *= sqrtf(energy_ch / energy_cpl);
+ return FFMIN(coord, COEF_MAX);