Exemplo n.º 1
0
bool WebRtcIlbcfix_CbConstruct(
    int16_t* decvector,        /* (o) Decoded vector */
    const int16_t* index,      /* (i) Codebook indices */
    const int16_t* gain_index, /* (i) Gain quantization indices */
    int16_t* mem,              /* (i) Buffer for codevector construction */
    size_t lMem,               /* (i) Length of buffer */
    size_t veclen) {           /* (i) Length of vector */
  size_t j;
  int16_t gain[CB_NSTAGES];
  /* Stack based */
  int16_t cbvec0[SUBL];
  int16_t cbvec1[SUBL];
  int16_t cbvec2[SUBL];
  int32_t a32;
  int16_t *gainPtr;

  /* gain de-quantization */

  gain[0] = WebRtcIlbcfix_GainDequant(gain_index[0], 16384, 0);
  gain[1] = WebRtcIlbcfix_GainDequant(gain_index[1], gain[0], 1);
  gain[2] = WebRtcIlbcfix_GainDequant(gain_index[2], gain[1], 2);

  /* codebook vector construction and construction of total vector */

  /* Stack based */
  if (!WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen))
    return false;  // Failure.
  if (!WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen))
    return false;  // Failure.
  if (!WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen))
    return false;  // Failure.

  gainPtr = &gain[0];
  for (j=0;j<veclen;j++) {
    a32 = (*gainPtr++) * cbvec0[j];
    a32 += (*gainPtr++) * cbvec1[j];
    a32 = OverflowingAddS32S32ToS32(a32, (*gainPtr) * cbvec2[j]);
    gainPtr -= 2;
    decvector[j] = (int16_t)((a32 + 8192) >> 14);
  }

  return true;  // Success.
}
Exemplo n.º 2
0
void WebRtcIlbcfix_CbConstruct(
    WebRtc_Word16 *decvector,  /* (o) Decoded vector */
    WebRtc_Word16 *index,   /* (i) Codebook indices */
    WebRtc_Word16 *gain_index,  /* (i) Gain quantization indices */
    WebRtc_Word16 *mem,   /* (i) Buffer for codevector construction */
    WebRtc_Word16 lMem,   /* (i) Length of buffer */
    WebRtc_Word16 veclen   /* (i) Length of vector */
                               ){
  int j;
  WebRtc_Word16 gain[CB_NSTAGES];
  /* Stack based */
  WebRtc_Word16 cbvec0[SUBL];
  WebRtc_Word16 cbvec1[SUBL];
  WebRtc_Word16 cbvec2[SUBL];
  WebRtc_Word32 a32;
  WebRtc_Word16 *gainPtr;

  /* gain de-quantization */

  gain[0] = WebRtcIlbcfix_GainDequant(gain_index[0], 16384, 0);
  gain[1] = WebRtcIlbcfix_GainDequant(gain_index[1], gain[0], 1);
  gain[2] = WebRtcIlbcfix_GainDequant(gain_index[2], gain[1], 2);

  /* codebook vector construction and construction of total vector */

  /* Stack based */
  WebRtcIlbcfix_GetCbVec(cbvec0, mem, index[0], lMem, veclen);
  WebRtcIlbcfix_GetCbVec(cbvec1, mem, index[1], lMem, veclen);
  WebRtcIlbcfix_GetCbVec(cbvec2, mem, index[2], lMem, veclen);

  gainPtr = &gain[0];
  for (j=0;j<veclen;j++) {
    a32  = WEBRTC_SPL_MUL_16_16(*gainPtr++, cbvec0[j]);
    a32 += WEBRTC_SPL_MUL_16_16(*gainPtr++, cbvec1[j]);
    a32 += WEBRTC_SPL_MUL_16_16(*gainPtr, cbvec2[j]);
    gainPtr -= 2;
    decvector[j] = (WebRtc_Word16) WEBRTC_SPL_RSHIFT_W32(a32 + 8192, 14);
  }

  return;
}
Exemplo n.º 3
0
void WebRtcIlbcfix_CbConstruct(
    int16_t *decvector,  /* (o) Decoded vector */
    int16_t *index,   /* (i) Codebook indices */
    int16_t *gain_index,  /* (i) Gain quantization indices */
    int16_t *mem,   /* (i) Buffer for codevector construction */
    int16_t lMem,   /* (i) Length of buffer */
    int16_t veclen   /* (i) Length of vector */
                               ){
  int j;
  int16_t gain[CB_NSTAGES];
  /* Stack based */
  int16_t cbvec0[SUBL];
  int16_t cbvec1[SUBL];
  int16_t cbvec2[SUBL];
  int32_t a32;
  int16_t *gainPtr;

  /* gain de-quantization */

  gain[0] = WebRtcIlbcfix_GainDequant(gain_index[0], 16384, 0);
  gain[1] = WebRtcIlbcfix_GainDequant(gain_index[1], gain[0], 1);
  gain[2] = WebRtcIlbcfix_GainDequant(gain_index[2], gain[1], 2);

  /* codebook vector construction and construction of total vector */

  /* Stack based */
  WebRtcIlbcfix_GetCbVec(cbvec0, mem, index[0], lMem, veclen);
  WebRtcIlbcfix_GetCbVec(cbvec1, mem, index[1], lMem, veclen);
  WebRtcIlbcfix_GetCbVec(cbvec2, mem, index[2], lMem, veclen);

  gainPtr = &gain[0];
  for (j=0;j<veclen;j++) {
    a32 = (*gainPtr++) * cbvec0[j];
    a32 += (*gainPtr++) * cbvec1[j];
    a32 += (*gainPtr) * cbvec2[j];
    gainPtr -= 2;
    decvector[j] = (int16_t)((a32 + 8192) >> 14);
  }

  return;
}