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/third_party/ffmpeg/libavcodec/
Dopus_silk.c162 int gaindiv; // Q30; inverse of the gain (the divisor) in silk_is_lpc_stable() local
171 gaindiv = (1 << 30) - MULH(rc, rc); in silk_is_lpc_stable()
173 totalinvgain = MULH(totalinvgain, gaindiv) << 2; in silk_is_lpc_stable()
178 fbits = opus_ilog(gaindiv); in silk_is_lpc_stable()
179 gain = ((1 << 29) - 1) / (gaindiv >> (fbits + 1 - 16)); // Q<fbits-16> in silk_is_lpc_stable()
180 error = (1 << 29) - MULL(gaindiv << (15 + 16 - fbits), gain, 16); in silk_is_lpc_stable()