#include "celp_math.h"
#include "celp_filters.h"
#include "acelp_vectors.h"
+#include "lsp.h"
#undef NDEBUG
#include <assert.h>
uint8_t warned_buf_mismatch_bitrate;
} QCELPContext;
-/**
- * Reconstructs LPC coefficients from the line spectral pair frequencies.
- *
- * TIA/EIA/IS-733 2.4.3.3.5
- */
-void ff_celp_lspf2lpc(const double *lspf, float *lpc);
-
/**
* Initialize the speech codec according to the specification.
*
}
}
-/**
- * Compute the gain control
- *
- * @param v_in gain-controlled vector
- * @param v_ref vector to control gain of
- *
- * @return gain control
- *
- * FIXME: If v_ref is a zero vector, it energy is zero
- * and the behavior of the gain control is
- * undefined in the specs.
- *
- * TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6
- */
-static float compute_gain_ctrl(const float *v_ref, const float *v_in, const int len)
-{
- float scalefactor = ff_dot_productf(v_in, v_in, len);
-
- if(scalefactor)
- scalefactor = sqrt(ff_dot_productf(v_ref, v_ref, len) / scalefactor);
- else
- ff_log_missing_feature(NULL, "Zero energy for gain control", 1);
- return scalefactor;
-}
-
/**
* Apply generic gain control.
*
static void apply_gain_ctrl(float *v_out, const float *v_ref,
const float *v_in)
{
- int i, j, len;
- float scalefactor;
+ int i;
- for(i=0, j=0; i<4; i++)
- {
- scalefactor = compute_gain_ctrl(v_ref + j, v_in + j, 40);
- for(len=j+40; j<len; j++)
- v_out[j] = scalefactor * v_in[j];
- }
+ for (i = 0; i < 160; i += 40)
+ ff_scale_vector_to_given_sum_of_squares(v_out + i, v_in + i,
+ ff_dot_productf(v_ref + i,
+ v_ref + i, 40),
+ 40);
}
/**
*/
static void lspf2lpc(const float *lspf, float *lpc)
{
- double lsf[10];
+ double lsp[10];
double bandwidth_expansion_coeff = QCELP_BANDWIDTH_EXPANSION_COEFF;
int i;
for (i=0; i<10; i++)
- lsf[i] = cos(M_PI * lspf[i]);
+ lsp[i] = cos(M_PI * lspf[i]);
- ff_celp_lspf2lpc(lsf, lpc);
+ ff_acelp_lspd2lpc(lsp, lpc, 5);
for (i=0; i<10; i++)
{
* @param lpc float vector for the resulting LPC
* @param subframe_num frame number in decoded stream
*/
-void interpolate_lpc(QCELPContext *q, const float *curr_lspf, float *lpc,
- const int subframe_num)
+static void interpolate_lpc(QCELPContext *q, const float *curr_lspf,
+ float *lpc, const int subframe_num)
{
float interpolated_lspf[10];
float weight;
if(bitrate == SILENCE)
{
//FIXME: Remove experimental warning when tested with samples.
- ff_log_ask_for_sample(avctx, "'Blank frame handling is experimental.");
+ av_log_ask_for_sample(avctx, "'Blank frame handling is experimental.");
}
return bitrate;
}