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added SIMD version of convertors

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This commit is contained in:
georgemoralis 2026-02-11 12:29:08 +02:00
parent e72115d59f
commit d9099bab05
1 changed files with 88 additions and 3 deletions
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91
src/core/libraries/audio/openal_audio_out.cpp
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@ -37,7 +37,7 @@ constexpr u64 MIN_SLEEP_THRESHOLD_US = 10;
constexpr u64 TIMING_RESYNC_THRESHOLD_US = 100000; // Resync if >100ms behind
// OpenAL constants
constexpr ALsizei NUM_BUFFERS = 6;
constexpr ALsizei NUM_BUFFERS = 6;
constexpr ALsizei BUFFER_QUEUE_THRESHOLD = 2; // Queue more buffers when below this
// Channel positions
@ -122,7 +122,7 @@ public:
if (state != AL_PLAYING && queued > 0) {
LOG_DEBUG(Lib_AudioOut, "Audio underrun detected (queued: {}), restarting source",
queued);
queued);
alSourcePlay(source);
}
@ -432,10 +432,18 @@ private:
convert = &ConvertF32ToS16Mono;
break;
case 2:
#ifdef HAS_SSE2
convert = &ConvertF32ToS16StereoSIMD;
#else
convert = &ConvertF32ToS16Stereo;
#endif
break;
case 8:
#ifdef HAS_SSE2
convert = is_std ? &ConvertF32ToS16Std8CH : &ConvertF32ToS16_8CH_SIMD;
#else
convert = is_std ? &ConvertF32ToS16Std8CH : &ConvertF32ToS16_8CH;
#endif
break;
default:
LOG_ERROR(Lib_AudioOut, "Unsupported float channel count: {}", num_channels);
@ -527,7 +535,49 @@ private:
for (u32 i = 0; i < frames; i++)
d[i] = OrbisFloatToS16(s[i]);
}
#ifdef HAS_SSE2
static void ConvertF32ToS16StereoSIMD(const void* src, void* dst, u32 frames, const float*) {
const float* s = static_cast<const float*>(src);
s16* d = static_cast<s16*>(dst);
const __m128 scale = _mm_set1_ps(32768.0f);
const __m128 min_val = _mm_set1_ps(-32768.0f);
const __m128 max_val = _mm_set1_ps(32767.0f);
const u32 num_samples = frames << 1;
u32 i = 0;
// Process 8 samples at a time
for (; i + 8 <= num_samples; i += 8) {
// Load 8 floats
__m128 f1 = _mm_loadu_ps(&s[i]);
__m128 f2 = _mm_loadu_ps(&s[i + 4]);
// Scale and clamp
f1 = _mm_mul_ps(f1, scale);
f2 = _mm_mul_ps(f2, scale);
f1 = _mm_max_ps(f1, min_val);
f2 = _mm_max_ps(f2, min_val);
f1 = _mm_min_ps(f1, max_val);
f2 = _mm_min_ps(f2, max_val);
// Convert to int32
__m128i i1 = _mm_cvtps_epi32(f1);
__m128i i2 = _mm_cvtps_epi32(f2);
// Pack to int16
__m128i packed = _mm_packs_epi32(i1, i2);
// Store
_mm_storeu_si128(reinterpret_cast<__m128i*>(&d[i]), packed);
}
// Handle remaining samples
for (; i < num_samples; i++) {
d[i] = OrbisFloatToS16(s[i]);
}
}
#elif
static void ConvertF32ToS16Stereo(const void* src, void* dst, u32 frames, const float*) {
const float* s = static_cast<const float*>(src);
s16* d = static_cast<s16*>(dst);
@ -536,7 +586,42 @@ private:
for (u32 i = 0; i < num_samples; i++)
d[i] = OrbisFloatToS16(s[i]);
}
#endif
#ifdef HAS_SSE2
static void ConvertF32ToS16_8CH_SIMD(const void* src, void* dst, u32 frames, const float*) {
const float* s = static_cast<const float*>(src);
s16* d = static_cast<s16*>(dst);
const __m128 scale = _mm_set1_ps(32768.0f);
const __m128 min_val = _mm_set1_ps(-32768.0f);
const __m128 max_val = _mm_set1_ps(32767.0f);
const u32 num_samples = frames << 3;
u32 i = 0;
// Process 8 samples at a time (1 frame of 8CH audio)
for (; i + 8 <= num_samples; i += 8) {
__m128 f1 = _mm_loadu_ps(&s[i]);
__m128 f2 = _mm_loadu_ps(&s[i + 4]);
f1 = _mm_mul_ps(f1, scale);
f2 = _mm_mul_ps(f2, scale);
f1 = _mm_max_ps(_mm_min_ps(f1, max_val), min_val);
f2 = _mm_max_ps(_mm_min_ps(f2, max_val), min_val);
__m128i i1 = _mm_cvtps_epi32(f1);
__m128i i2 = _mm_cvtps_epi32(f2);
__m128i packed = _mm_packs_epi32(i1, i2);
_mm_storeu_si128(reinterpret_cast<__m128i*>(&d[i]), packed);
}
for (; i < num_samples; i++) {
d[i] = OrbisFloatToS16(s[i]);
}
}
#elif
static void ConvertF32ToS16_8CH(const void* src, void* dst, u32 frames, const float*) {
const float* s = static_cast<const float*>(src);
s16* d = static_cast<s16*>(dst);
@ -545,7 +630,7 @@ private:
for (u32 i = 0; i < num_samples; i++)
d[i] = OrbisFloatToS16(s[i]);
}
#endif
static void ConvertF32ToS16Std8CH(const void* src, void* dst, u32 frames, const float*) {
const float* s = static_cast<const float*>(src);
s16* d = static_cast<s16*>(dst);