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https://gitlab.freedesktop.org/pipewire/pipewire.git
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817d5bd7a4
Make a new uint42_t and int24_t type and use that to handle 24 bits samples. This makes it easier because we can iterate and copy the structs like other types.
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
/* Spa
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "fmt-ops.h"
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#include <smmintrin.h>
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static void
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conv_s24_to_f32d_1s_sse41(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
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uint32_t n_channels, uint32_t n_samples)
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{
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const int24_t *s = src;
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float *d0 = dst[0];
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uint32_t n, unrolled;
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__m128i in = _mm_setzero_si128();
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__m128 out, factor = _mm_set1_ps(1.0f / S24_SCALE);
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if (SPA_IS_ALIGNED(d0, 16))
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unrolled = n_samples & ~3;
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else
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unrolled = 0;
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for(n = 0; n < unrolled; n += 4) {
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in = _mm_insert_epi32(in, *((uint32_t*)&s[0 * n_channels]), 0);
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in = _mm_insert_epi32(in, *((uint32_t*)&s[1 * n_channels]), 1);
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in = _mm_insert_epi32(in, *((uint32_t*)&s[2 * n_channels]), 2);
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in = _mm_insert_epi32(in, *((uint32_t*)&s[3 * n_channels]), 3);
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in = _mm_slli_epi32(in, 8);
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in = _mm_srai_epi32(in, 8);
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out = _mm_cvtepi32_ps(in);
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out = _mm_mul_ps(out, factor);
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_mm_store_ps(&d0[n], out);
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s += 4 * n_channels;
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}
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for(; n < n_samples; n++) {
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out = _mm_cvtsi32_ss(factor, s24_to_s32(*s));
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out = _mm_mul_ss(out, factor);
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_mm_store_ss(&d0[n], out);
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s += n_channels;
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}
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}
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extern void conv_s24_to_f32d_2s_sse2(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
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uint32_t n_channels, uint32_t n_samples);
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extern void conv_s24_to_f32d_4s_ssse3(void *data, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src,
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uint32_t n_channels, uint32_t n_samples);
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void
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conv_s24_to_f32d_sse41(struct convert *conv, void * SPA_RESTRICT dst[], const void * SPA_RESTRICT src[],
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uint32_t n_samples)
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{
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const int8_t *s = src[0];
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uint32_t i = 0, n_channels = conv->n_channels;
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#if defined (HAVE_SSSE3)
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for(; i + 3 < n_channels; i += 4)
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conv_s24_to_f32d_4s_ssse3(conv, &dst[i], &s[3*i], n_channels, n_samples);
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#endif
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#if defined (HAVE_SSE2)
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for(; i + 1 < n_channels; i += 2)
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conv_s24_to_f32d_2s_sse2(conv, &dst[i], &s[3*i], n_channels, n_samples);
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#endif
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for(; i < n_channels; i++)
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conv_s24_to_f32d_1s_sse41(conv, &dst[i], &s[3*i], n_channels, n_samples);
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}
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