ppsspp/Core/Util/AudioFormatNEON.cpp

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2015-01-11 21:50:52 +00:00
// Copyright (c) 2012- PPSSPP Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include <arm_neon.h>
#include "Common/Common.h"
#include "Core/Util/AudioFormat.h"
#include "Core/Util/AudioFormatNEON.h"
#ifndef ARM
#error Should not be compiled on non-ARM.
#endif
static s16 MEMORY_ALIGNED16(volumeValues[4]) = {};
void AdjustVolumeBlockNEON(s16 *out, s16 *in, size_t size, int leftVol, int rightVol) {
volumeValues[0] = leftVol >> 1;
volumeValues[1] = rightVol >> 1;
volumeValues[2] = leftVol >> 1;
volumeValues[3] = rightVol >> 1;
const int16x4_t vol = vld1_s16(volumeValues);
while (size >= 16) {
int16x8_t indata1 = vld1q_s16(in);
int16x8_t indata2 = vld1q_s16(in + 8);
int32x4_t outh1 = vmull_s16(vget_high_s16(indata1), vol);
int32x4_t outh2 = vmull_s16(vget_high_s16(indata2), vol);
int32x4_t outl1 = vmull_s16(vget_low_s16(indata1), vol);
int32x4_t outl2 = vmull_s16(vget_low_s16(indata2), vol);
int16x8_t outdata1 = vcombine_s16(vqshrn_n_s32(outl1, 15), vqshrn_n_s32(outh1, 15));
int16x8_t outdata2 = vcombine_s16(vqshrn_n_s32(outl2, 15), vqshrn_n_s32(outh2, 15));
vst1q_s16(out, outdata1);
vst1q_s16(out + 8, outdata2);
in += 16;
out += 16;
size -= 16;
}
for (size_t i = 0; i < size; i += 2) {
out[i] = ApplySampleVolume(in[i], leftVol);
out[i + 1] = ApplySampleVolume(in[i + 1], rightVol);
}
}