mirror of
https://github.com/libretro/ppsspp.git
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59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
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// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <arm_neon.h>
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#include "Common/Common.h"
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#include "Core/Util/AudioFormat.h"
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#include "Core/Util/AudioFormatNEON.h"
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#ifndef ARM
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#error Should not be compiled on non-ARM.
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#endif
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static s16 MEMORY_ALIGNED16(volumeValues[4]) = {};
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void AdjustVolumeBlockNEON(s16 *out, s16 *in, size_t size, int leftVol, int rightVol) {
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volumeValues[0] = leftVol >> 1;
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volumeValues[1] = rightVol >> 1;
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volumeValues[2] = leftVol >> 1;
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volumeValues[3] = rightVol >> 1;
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const int16x4_t vol = vld1_s16(volumeValues);
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while (size >= 16) {
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int16x8_t indata1 = vld1q_s16(in);
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int16x8_t indata2 = vld1q_s16(in + 8);
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int32x4_t outh1 = vmull_s16(vget_high_s16(indata1), vol);
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int32x4_t outh2 = vmull_s16(vget_high_s16(indata2), vol);
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int32x4_t outl1 = vmull_s16(vget_low_s16(indata1), vol);
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int32x4_t outl2 = vmull_s16(vget_low_s16(indata2), vol);
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int16x8_t outdata1 = vcombine_s16(vqshrn_n_s32(outl1, 15), vqshrn_n_s32(outh1, 15));
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int16x8_t outdata2 = vcombine_s16(vqshrn_n_s32(outl2, 15), vqshrn_n_s32(outh2, 15));
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vst1q_s16(out, outdata1);
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vst1q_s16(out + 8, outdata2);
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in += 16;
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out += 16;
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size -= 16;
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}
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for (size_t i = 0; i < size; i += 2) {
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out[i] = ApplySampleVolume(in[i], leftVol);
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out[i + 1] = ApplySampleVolume(in[i + 1], rightVol);
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}
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}
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