mirror of
https://github.com/sal063/AC6_recomp
synced 2026-05-29 08:43:09 -04:00
salh
273 lines
12 KiB
C++
273 lines
12 KiB
C++
// Native audio runtime
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// Part of the AC6 Recompilation native foundation
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#pragma once
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#include <cmath>
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#include <cstdint>
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#include <native/audio/render_driver_frame_layout.h>
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#include <rex/platform.h>
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#include <rex/types.h>
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namespace rex::audio::conversion {
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inline constexpr float kStereoDownmixCenterGain = 0.70710678f;
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inline constexpr float kStereoDownmixSurroundGain = 0.5f;
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inline constexpr float kStereoDownmixLfeGain = 0.0f;
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inline constexpr float kStereoDownmixPeakHeadroom = 0.92f;
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inline constexpr float kStereoDownmixNormalize =
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1.0f / (1.0f + kStereoDownmixCenterGain + kStereoDownmixSurroundGain +
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kStereoDownmixLfeGain);
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inline float SanitizeGuestAudioSample(float sample) {
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if (!std::isfinite(sample)) {
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return 0.0f;
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}
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if (sample > 1.0f) {
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return 1.0f;
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}
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if (sample < -1.0f) {
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return -1.0f;
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}
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return sample;
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}
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#if REX_ARCH_AMD64
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inline __m128 SanitizeGuestAudioSamples(__m128 samples) {
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const __m128 ordered_mask = _mm_cmpord_ps(samples, samples);
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const __m128 min_sample = _mm_set1_ps(-1.0f);
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const __m128 max_sample = _mm_set1_ps(1.0f);
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samples = _mm_and_ps(samples, ordered_mask);
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return _mm_min_ps(max_sample, _mm_max_ps(min_sample, samples));
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}
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#endif
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#if REX_ARCH_AMD64
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inline void sequential_6_BE_to_interleaved_6_LE(float* output, const float* input,
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size_t ch_sample_count) {
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const uint32_t* in = reinterpret_cast<const uint32_t*>(input);
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uint32_t* out = reinterpret_cast<uint32_t*>(output);
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const __m128i byte_swap_shuffle =
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_mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3);
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for (size_t sample = 0; sample < ch_sample_count; sample++) {
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__m128i sample0 =
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_mm_set_epi32(in[3 * ch_sample_count + sample], in[2 * ch_sample_count + sample],
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in[1 * ch_sample_count + sample], in[0 * ch_sample_count + sample]);
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uint32_t sample1 = in[4 * ch_sample_count + sample];
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uint32_t sample2 = in[5 * ch_sample_count + sample];
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sample0 = _mm_shuffle_epi8(sample0, byte_swap_shuffle);
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_mm_storeu_si128(reinterpret_cast<__m128i*>(&out[sample * 6]), sample0);
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sample1 = rex::byte_swap(sample1);
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out[sample * 6 + 4] = sample1;
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sample2 = rex::byte_swap(sample2);
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out[sample * 6 + 5] = sample2;
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}
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}
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inline void sequential_6_BE_to_interleaved_2_LE(float* output, const float* input,
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size_t ch_sample_count) {
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assert_true(ch_sample_count % 4 == 0);
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const __m128i byte_swap_shuffle =
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_mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3);
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const __m128 center_gain = _mm_set1_ps(kStereoDownmixCenterGain);
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const __m128 surround_gain = _mm_set1_ps(kStereoDownmixSurroundGain);
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const __m128 lfe_gain = _mm_set1_ps(kStereoDownmixLfeGain);
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const __m128 normalize = _mm_set1_ps(kStereoDownmixNormalize);
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const __m128 peak_headroom = _mm_set1_ps(kStereoDownmixPeakHeadroom);
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const __m128 sign_mask = _mm_set1_ps(-0.0f);
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// Use a dialogue-forward stereo fold-down. The old mapping mixed rears too
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// heavily for cutscenes and could sound smeared on stereo playback.
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for (size_t sample = 0; sample < ch_sample_count; sample += 4) {
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__m128 fl = _mm_loadu_ps(&input[0 * ch_sample_count + sample]);
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__m128 fr = _mm_loadu_ps(&input[1 * ch_sample_count + sample]);
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__m128 fc = _mm_loadu_ps(&input[2 * ch_sample_count + sample]);
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__m128 lf = _mm_loadu_ps(&input[3 * ch_sample_count + sample]);
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__m128 bl = _mm_loadu_ps(&input[4 * ch_sample_count + sample]);
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__m128 br = _mm_loadu_ps(&input[5 * ch_sample_count + sample]);
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fl = _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(fl), byte_swap_shuffle));
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fr = _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(fr), byte_swap_shuffle));
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fc = _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(fc), byte_swap_shuffle));
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lf = _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(lf), byte_swap_shuffle));
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bl = _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(bl), byte_swap_shuffle));
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br = _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(br), byte_swap_shuffle));
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fl = SanitizeGuestAudioSamples(fl);
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fr = SanitizeGuestAudioSamples(fr);
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fc = SanitizeGuestAudioSamples(fc);
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lf = SanitizeGuestAudioSamples(lf);
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bl = SanitizeGuestAudioSamples(bl);
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br = SanitizeGuestAudioSamples(br);
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__m128 left = _mm_add_ps(
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_mm_add_ps(fl, _mm_mul_ps(fc, center_gain)),
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_mm_add_ps(_mm_mul_ps(bl, surround_gain), _mm_mul_ps(lf, lfe_gain)));
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__m128 right = _mm_add_ps(
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_mm_add_ps(fr, _mm_mul_ps(fc, center_gain)),
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_mm_add_ps(_mm_mul_ps(br, surround_gain), _mm_mul_ps(lf, lfe_gain)));
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left = _mm_mul_ps(left, normalize);
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right = _mm_mul_ps(right, normalize);
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// Apply a lightweight linked limiter instead of hard clipping. Mission
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// mixes can stack enough combat layers to hit repeated peaks, which sounds
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// like constant crackling when clipped.
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const __m128 left_abs = _mm_andnot_ps(sign_mask, left);
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const __m128 right_abs = _mm_andnot_ps(sign_mask, right);
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const __m128 max_abs = _mm_max_ps(left_abs, right_abs);
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const __m128 limiter_denominator = _mm_max_ps(max_abs, peak_headroom);
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const __m128 limiter_scale = _mm_div_ps(peak_headroom, limiter_denominator);
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left = _mm_mul_ps(left, limiter_scale);
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right = _mm_mul_ps(right, limiter_scale);
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_mm_storeu_ps(&output[sample * 2], _mm_unpacklo_ps(left, right));
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_mm_storeu_ps(&output[(sample + 2) * 2], _mm_unpackhi_ps(left, right));
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}
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}
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inline void interleaved_6_BE_to_interleaved_2_LE(float* output, const float* input,
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size_t ch_sample_count) {
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for (size_t sample = 0; sample < ch_sample_count; ++sample) {
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float fl = rex::byte_swap(input[sample * 6 + 0]);
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float fr = rex::byte_swap(input[sample * 6 + 1]);
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float fc = rex::byte_swap(input[sample * 6 + 2]);
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float lf = rex::byte_swap(input[sample * 6 + 3]);
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float bl = rex::byte_swap(input[sample * 6 + 4]);
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float br = rex::byte_swap(input[sample * 6 + 5]);
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fl = SanitizeGuestAudioSample(fl);
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fr = SanitizeGuestAudioSample(fr);
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fc = SanitizeGuestAudioSample(fc);
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lf = SanitizeGuestAudioSample(lf);
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bl = SanitizeGuestAudioSample(bl);
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br = SanitizeGuestAudioSample(br);
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float left = (fl + (fc * kStereoDownmixCenterGain) + (bl * kStereoDownmixSurroundGain) +
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(lf * kStereoDownmixLfeGain)) *
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kStereoDownmixNormalize;
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float right = (fr + (fc * kStereoDownmixCenterGain) + (br * kStereoDownmixSurroundGain) +
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(lf * kStereoDownmixLfeGain)) *
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kStereoDownmixNormalize;
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float max_abs = left >= 0.0f ? left : -left;
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float right_abs = right >= 0.0f ? right : -right;
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if (right_abs > max_abs) {
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max_abs = right_abs;
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}
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if (max_abs > kStereoDownmixPeakHeadroom) {
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const float limiter_scale = kStereoDownmixPeakHeadroom / max_abs;
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left *= limiter_scale;
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right *= limiter_scale;
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}
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output[sample * 2] = left;
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output[sample * 2 + 1] = right;
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}
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}
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inline void render_driver_6_BE_to_interleaved_2_LE(float* output, const float* input,
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size_t ch_sample_count) {
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switch (ResolveRenderDriverFrameLayout(input, ch_sample_count)) {
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case RenderDriverFrameLayout::kInterleaved:
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interleaved_6_BE_to_interleaved_2_LE(output, input, ch_sample_count);
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return;
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case RenderDriverFrameLayout::kPlanar:
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default:
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sequential_6_BE_to_interleaved_2_LE(output, input, ch_sample_count);
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return;
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}
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}
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#else
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inline void sequential_6_BE_to_interleaved_6_LE(float* output, const float* input,
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size_t ch_sample_count) {
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for (size_t sample = 0; sample < ch_sample_count; sample++) {
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for (size_t channel = 0; channel < 6; channel++) {
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output[sample * 6 + channel] = rex::byte_swap(input[channel * ch_sample_count + sample]);
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}
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}
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}
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inline void sequential_6_BE_to_interleaved_2_LE(float* output, const float* input,
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size_t ch_sample_count) {
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// Default 5.1 channel mapping is fl, fr, fc, lf, bl, br
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// https://docs.microsoft.com/en-us/windows/win32/xaudio2/xaudio2-default-channel-mapping
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for (size_t sample = 0; sample < ch_sample_count; sample++) {
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float fl = rex::byte_swap(input[0 * ch_sample_count + sample]);
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float fr = rex::byte_swap(input[1 * ch_sample_count + sample]);
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float fc = rex::byte_swap(input[2 * ch_sample_count + sample]);
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float lf = rex::byte_swap(input[3 * ch_sample_count + sample]);
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float bl = rex::byte_swap(input[4 * ch_sample_count + sample]);
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float br = rex::byte_swap(input[5 * ch_sample_count + sample]);
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fl = SanitizeGuestAudioSample(fl);
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fr = SanitizeGuestAudioSample(fr);
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fc = SanitizeGuestAudioSample(fc);
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lf = SanitizeGuestAudioSample(lf);
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bl = SanitizeGuestAudioSample(bl);
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br = SanitizeGuestAudioSample(br);
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float left = (fl + (fc * kStereoDownmixCenterGain) + (bl * kStereoDownmixSurroundGain) +
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(lf * kStereoDownmixLfeGain)) *
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kStereoDownmixNormalize;
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float right = (fr + (fc * kStereoDownmixCenterGain) + (br * kStereoDownmixSurroundGain) +
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(lf * kStereoDownmixLfeGain)) *
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kStereoDownmixNormalize;
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float max_abs = left >= 0.0f ? left : -left;
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float right_abs = right >= 0.0f ? right : -right;
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if (right_abs > max_abs) {
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max_abs = right_abs;
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}
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if (max_abs > kStereoDownmixPeakHeadroom) {
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const float limiter_scale = kStereoDownmixPeakHeadroom / max_abs;
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left *= limiter_scale;
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right *= limiter_scale;
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}
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output[sample * 2] = left;
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output[sample * 2 + 1] = right;
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}
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}
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inline void interleaved_6_BE_to_interleaved_2_LE(float* output, const float* input,
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size_t ch_sample_count) {
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for (size_t sample = 0; sample < ch_sample_count; sample++) {
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float fl = rex::byte_swap(input[sample * 6 + 0]);
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float fr = rex::byte_swap(input[sample * 6 + 1]);
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float fc = rex::byte_swap(input[sample * 6 + 2]);
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float lf = rex::byte_swap(input[sample * 6 + 3]);
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float bl = rex::byte_swap(input[sample * 6 + 4]);
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float br = rex::byte_swap(input[sample * 6 + 5]);
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fl = SanitizeGuestAudioSample(fl);
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fr = SanitizeGuestAudioSample(fr);
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fc = SanitizeGuestAudioSample(fc);
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lf = SanitizeGuestAudioSample(lf);
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bl = SanitizeGuestAudioSample(bl);
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br = SanitizeGuestAudioSample(br);
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float left = (fl + (fc * kStereoDownmixCenterGain) + (bl * kStereoDownmixSurroundGain) +
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(lf * kStereoDownmixLfeGain)) *
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kStereoDownmixNormalize;
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float right = (fr + (fc * kStereoDownmixCenterGain) + (br * kStereoDownmixSurroundGain) +
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(lf * kStereoDownmixLfeGain)) *
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kStereoDownmixNormalize;
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float max_abs = left >= 0.0f ? left : -left;
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float right_abs = right >= 0.0f ? right : -right;
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if (right_abs > max_abs) {
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max_abs = right_abs;
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}
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if (max_abs > kStereoDownmixPeakHeadroom) {
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const float limiter_scale = kStereoDownmixPeakHeadroom / max_abs;
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left *= limiter_scale;
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right *= limiter_scale;
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}
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output[sample * 2] = left;
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output[sample * 2 + 1] = right;
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}
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}
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inline void render_driver_6_BE_to_interleaved_2_LE(float* output, const float* input,
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size_t ch_sample_count) {
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switch (ResolveRenderDriverFrameLayout(input, ch_sample_count)) {
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case RenderDriverFrameLayout::kInterleaved:
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interleaved_6_BE_to_interleaved_2_LE(output, input, ch_sample_count);
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return;
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case RenderDriverFrameLayout::kPlanar:
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default:
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sequential_6_BE_to_interleaved_2_LE(output, input, ch_sample_count);
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return;
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}
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}
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#endif
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} // namespace rex::audio::conversion
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