/**
* Calculate LPC coefficients for multiple orders
*
- * @param use_lpc LPC method for determining coefficients
- * 0 = LPC with fixed pre-defined coeffs
- * 1 = LPC with coeffs determined by Levinson-Durbin recursion
- * 2+ = LPC with coeffs determined by Cholesky factorization using (use_lpc-1) passes.
+ * @param lpc_type LPC method for determining coefficients,
+ * see #FFLPCType for details
*/
int ff_lpc_calc_coefs(LPCContext *s,
const int32_t *samples, int blocksize, int min_order,
int max_order, int precision,
int32_t coefs[][MAX_LPC_ORDER], int *shift,
- enum AVLPCType lpc_type, int lpc_passes,
+ enum FFLPCType lpc_type, int lpc_passes,
int omethod, int max_shift, int zero_shift)
{
double autoc[MAX_LPC_ORDER+1];
int opt_order;
assert(max_order >= MIN_LPC_ORDER && max_order <= MAX_LPC_ORDER &&
- lpc_type > AV_LPC_TYPE_FIXED);
+ lpc_type > FF_LPC_TYPE_FIXED);
/* reinit LPC context if parameters have changed */
if (blocksize != s->blocksize || max_order != s->max_order ||
ff_lpc_init(s, blocksize, max_order, lpc_type);
}
- if (lpc_type == AV_LPC_TYPE_LEVINSON) {
+ if (lpc_type == FF_LPC_TYPE_LEVINSON) {
double *windowed_samples = s->windowed_samples + max_order;
s->lpc_apply_welch_window(samples, blocksize, windowed_samples);
for(i=0; i<max_order; i++)
ref[i] = fabs(lpc[i][i]);
- } else if (lpc_type == AV_LPC_TYPE_CHOLESKY) {
+ } else if (lpc_type == FF_LPC_TYPE_CHOLESKY) {
LLSModel m[2];
double var[MAX_LPC_ORDER+1], av_uninit(weight);
}
av_cold int ff_lpc_init(LPCContext *s, int blocksize, int max_order,
- enum AVLPCType lpc_type)
+ enum FFLPCType lpc_type)
{
s->blocksize = blocksize;
s->max_order = max_order;
s->lpc_type = lpc_type;
- if (lpc_type == AV_LPC_TYPE_LEVINSON) {
+ if (lpc_type == FF_LPC_TYPE_LEVINSON) {
s->windowed_samples = av_mallocz((blocksize + max_order + 2) *
sizeof(*s->windowed_samples));
if (!s->windowed_samples)