ff_log2            87 libavcodec/acelp_pitch_delay.c         quant_energy[0] = (6165 * ((ff_log2(gain_corr_factor) >> 2) - (13 << 13))) >> 13;
ff_log2           108 libavcodec/acelp_pitch_delay.c     mr_energy += (((-6165LL * ff_log2(dsp->scalarproduct_int16(fc_v, fc_v, subframe_size, 0))) >> 3) & ~0x3ff);
ff_log2            51 libavcodec/celp_math.h int ff_log2(uint32_t value);