annotate projects/heavy/envelopeTrigger/HvTable.c @ 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.
 */

#include "HvTable.h"

hv_size_t hTable_init(HvTable *o, int length) {
  o->length = length;
  // true size of the table is always an integer multple of HV_N_SIMD
  o->size = (length + HV_N_SIMD_MASK) & ~HV_N_SIMD_MASK;
  // add an extra length for mirroring
  o->allocated = o->size + HV_N_SIMD;
  o->head = 0;
  hv_size_t numBytes = o->allocated * sizeof(float);
  o->buffer = (float *) hv_malloc(numBytes);
  hv_memset(o->buffer, numBytes);
  return numBytes;
}

hv_size_t hTable_initWithData(HvTable *o, int length, const float *const data) {
  o->length = length;
  o->size = (length + HV_N_SIMD_MASK) & ~HV_N_SIMD_MASK;
  o->allocated = o->size + HV_N_SIMD;
  o->head = 0;
  hv_size_t numBytes = o->size * sizeof(float);
  o->buffer = (float *) hv_malloc(numBytes);
  hv_memset(o->buffer, numBytes);
  hv_memcpy(o->buffer, data, length*sizeof(float));
  return numBytes;
}

hv_size_t hTable_initWithFinalData(HvTable *o, int length, float *data) {
  o->length = length;
  o->size = length;
  o->allocated = length;
  o->buffer = data;
  o->head = 0;
  return 0;
}

void hTable_free(HvTable *o) {
  hv_free(o->buffer);
}

int hTable_resize(HvTable *o, hv_uint32_t newLength) {
  // TODO(mhroth): update context with memory allocated by table
  // NOTE(mhroth): mirrored bytes are not necessarily carried over
  const hv_uint32_t oldBytes = (hv_uint32_t) (o->size * sizeof(float));
  const hv_uint32_t newSize = (newLength + HV_N_SIMD_MASK) & ~HV_N_SIMD_MASK;
  const hv_uint32_t newAllocated = newSize + HV_N_SIMD;
  const hv_uint32_t newBytes = (hv_uint32_t) (newAllocated * sizeof(float));
  float *b = (float *) hv_realloc(o->buffer, newBytes);
  hv_assert(b != NULL); // error while reallocing!
  if (newSize > o->size) hv_clear_buffer(b+o->size, newAllocated-o->size); // clear new parts of the buffer
  if (b != o->buffer) {
    // the buffer has been reallocated, ensure that it is on a 32-byte boundary
    if ((((uintptr_t) (const void *) b) & 0x10) == 0) {
      o->buffer = b;
    } else {
      float *c = (float *) hv_malloc(newBytes);
      hv_assert(c != NULL);
      hv_clear_buffer(c, newLength);
      const hv_size_t min = hv_min_ui(o->size, newLength);
      hv_memcpy(c, b, min * sizeof(float));
      hv_free(b);
      o->buffer = c;
    }
  }
  o->length = newLength;
  o->size = newSize;
  o->allocated = newAllocated;
  return (int) (newBytes - oldBytes);
}

void hTable_onMessage(HvBase *_c, HvTable *o, int letIn, const HvMessage *const m,
    void (*sendMessage)(HvBase *, int, const HvMessage *const)) {
  if (msg_compareSymbol(m,0,"resize") && msg_isFloat(m,1) && msg_getFloat(m,1) >= 0.0f) {
    hTable_resize(o, (int) hv_ceil_f(msg_getFloat(m,1))); // apply ceil to ensure that tables always have enough space

    // send out the new size of the table
    HvMessage *n = HV_MESSAGE_ON_STACK(1);
    msg_initWithFloat(n, msg_getTimestamp(m), (float) hTable_getSize(o));
    sendMessage(_c, 0, n);
  }

  else if (msg_compareSymbol(m,0,"mirror")) {
    hv_memcpy(o->buffer+o->size, o->buffer, HV_N_SIMD*sizeof(float));
  }
}