annotate projects/heavy/envelopeTrigger/SignalDel1.h @ 162:c3e8226a5651 heavy-updated

- added additional flags to C rules (-DNDEBUG, -mfpu=neon)
- sample-accurate envelope triggering pd/heavy example

/**
 * Copyright (c) 2014, 2015, Enzien Audio Ltd.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _SIGNAL_DEL1_H_
#define _SIGNAL_DEL1_H_

#include "HvBase.h"

typedef struct SignalDel1 {
  hv_bufferf_t x;
} SignalDel1;

hv_size_t sDel1_init(SignalDel1 *o);

void sDel1_onMessage(HvBase *_c, SignalDel1 *o, int letIn, const HvMessage *m);

static inline void __hv_del1_f(SignalDel1 *o, hv_bInf_t bIn0, hv_bOutf_t bOut) {
#if HV_SIMD_AVX
  __m256 x = _mm256_permute_ps(bIn0, _MM_SHUFFLE(2,1,0,3)); // [3 0 1 2 7 4 5 6]
  __m256 n = _mm256_permute2f128_ps(o->x,x,0x1);            // [h e f g 3 0 1 2]
  *bOut = _mm256_blend_ps(x, n, 0x11);                      // [g 0 1 2 3 4 5 6]
  o->x = x;
#elif HV_SIMD_SSE
  __m128 n = _mm_blend_ps(o->x, bIn0, 0x7);
  *bOut = _mm_shuffle_ps(n, n, _MM_SHUFFLE(2,1,0,3));
  o->x = bIn0;
#elif HV_SIMD_NEON
  *bOut = vextq_f32(o->x, bIn0, 3);
  o->x = bIn0;
#else
  *bOut = o->x;
  o->x = bIn0;
#endif
}

#endif // _SIGNAL_DEL1_H_