/*!
* \brief Non-temporal, aligned, store of the given packed vector at the
* given memory position
*/
ETL_STATIC_INLINE(void) stream(int64_t* memory, avx_simd_long value) {
_mm256_stream_si256(reinterpret_cast<__m256i*>(memory), value.value);
}
// Process audio effects for 8 channels simultaneously:
void processEffects(const vec8_i32 &inpSamples, vec8_i32 &outSamples, const long n)
{
// Extract int samples and convert to doubles:
const vec4_d64 ds0 = _mm256_div_pd(
_mm256_cvtepi32_pd(_mm256_extractf128_si256(inpSamples, 0)),
_mm256_set1_pd((double)INT_MAX)
);
const vec4_d64 ds1 = _mm256_div_pd(
_mm256_cvtepi32_pd(_mm256_extractf128_si256(inpSamples, 1)),
_mm256_set1_pd((double)INT_MAX)
);
// Monitor input levels:
fx.fi_monitor.levels[n + 0] = scalar_to_dBFS(ds0);
fx.fi_monitor.levels[n + 1] = scalar_to_dBFS(ds1);
vec4_d64 s0, s1;
// f0_gain:
{
s0 = _mm256_mul_pd(ds0, fx.f0_gain.calc.gain[n + 0]);
s1 = _mm256_mul_pd(ds1, fx.f0_gain.calc.gain[n + 1]);
}
// Monitor levels:
fx.f0_output.levels[n + 0] = scalar_to_dBFS(s0);
fx.f0_output.levels[n + 1] = scalar_to_dBFS(s1);
// f1_compressor:
{
const vec4_dBFS l0 = scalar_to_dBFS_offs(s0);
const vec4_dBFS l1 = scalar_to_dBFS_offs(s1);
// over = s - thresh
vec4_dB over0 = _mm256_sub_pd(l0, fx.f1_compressor.input.threshold[n + 0]);
vec4_dB over1 = _mm256_sub_pd(l1, fx.f1_compressor.input.threshold[n + 1]);
// over = if over < 0.0 then 0.0 else over;
over0 = mm256_if_then_else(_mm256_cmp_pd(over0, _mm256_set1_pd(0.0), _CMP_LT_OQ), _mm256_set1_pd(0.0), over0);
over1 = mm256_if_then_else(_mm256_cmp_pd(over1, _mm256_set1_pd(0.0), _CMP_LT_OQ), _mm256_set1_pd(0.0), over1);
// over += DC_OFFSET
over0 = _mm256_add_pd(over0, DC_OFFSET);
over1 = _mm256_add_pd(over1, DC_OFFSET);
// env = over + coef * ( env - over )
const vec4_dB attack_env0 = _mm256_add_pd(over0, _mm256_mul_pd(fx.f1_compressor.calc.attack_coef[n + 0], _mm256_sub_pd(fx.f1_compressor.state.env[n + 0], over0)));
const vec4_dB attack_env1 = _mm256_add_pd(over1, _mm256_mul_pd(fx.f1_compressor.calc.attack_coef[n + 1], _mm256_sub_pd(fx.f1_compressor.state.env[n + 1], over1)));
const vec4_dB release_env0 = _mm256_add_pd(over0, _mm256_mul_pd(fx.f1_compressor.calc.release_coef[n + 0], _mm256_sub_pd(fx.f1_compressor.state.env[n + 0], over0)));
const vec4_dB release_env1 = _mm256_add_pd(over1, _mm256_mul_pd(fx.f1_compressor.calc.release_coef[n + 1], _mm256_sub_pd(fx.f1_compressor.state.env[n + 1], over1)));
// env = if over > env then attack_env else release_env
fx.f1_compressor.state.env[n + 0] = mm256_if_then_else(_mm256_cmp_pd(over0, fx.f1_compressor.state.env[n + 0], _CMP_GT_OQ), attack_env0, release_env0);
fx.f1_compressor.state.env[n + 1] = mm256_if_then_else(_mm256_cmp_pd(over1, fx.f1_compressor.state.env[n + 1], _CMP_GT_OQ), attack_env1, release_env1);
// over = env - DC_OFFSET
over0 = _mm256_sub_pd(fx.f1_compressor.state.env[n + 0], DC_OFFSET);
over1 = _mm256_sub_pd(fx.f1_compressor.state.env[n + 1], DC_OFFSET);
// grdB = ( over * ( ratio - 1.0 ) )
vec4_dB gr0dB = _mm256_mul_pd(over0, fx.f1_compressor.calc.ratio_min_1[n + 0]);
vec4_dB gr1dB = _mm256_mul_pd(over1, fx.f1_compressor.calc.ratio_min_1[n + 1]);
// gr = dB_to_scalar(grdB)
fx.f1_compressor.monitor.gain_reduction[n + 0] = dB_to_scalar(gr0dB);
fx.f1_compressor.monitor.gain_reduction[n + 1] = dB_to_scalar(gr1dB);
// Apply gain reduction to inputs:
s0 = _mm256_mul_pd(s0, fx.f1_compressor.monitor.gain_reduction[n + 0]);
s1 = _mm256_mul_pd(s1, fx.f1_compressor.monitor.gain_reduction[n + 1]);
// Apply make-up gain:
s0 = _mm256_mul_pd(s0, fx.f1_compressor.calc.gain[n + 0]);
s1 = _mm256_mul_pd(s1, fx.f1_compressor.calc.gain[n + 1]);
}
// Monitor output levels:
fx.fo_monitor.levels[n + 0] = scalar_to_dBFS(s0);
fx.fo_monitor.levels[n + 1] = scalar_to_dBFS(s1);
// TODO(jsd): Better limiter implementation!
// Limit final samples:
s0 = _mm256_max_pd(_mm256_min_pd(s0, _mm256_set1_pd((double)1.0)), _mm256_set1_pd((double)-1.0));
s1 = _mm256_max_pd(_mm256_min_pd(s1, _mm256_set1_pd((double)1.0)), _mm256_set1_pd((double)-1.0));
// Convert doubles back to 32-bit ints:
s0 = _mm256_mul_pd(s0, _mm256_set1_pd((double)INT_MAX));
s1 = _mm256_mul_pd(s1, _mm256_set1_pd((double)INT_MAX));
const vec8_i32 os = _mm256_setr_m128i(_mm256_cvtpd_epi32(s0), _mm256_cvtpd_epi32(s1));
// Write outputs:
_mm256_stream_si256(&outSamples, os);
}