dca_state_t * dca_init (uint32_t mm_accel)
{
dca_state_t * state;
int i;
(void)mm_accel;
state = (dca_state_t *) malloc (sizeof (dca_state_t));
if (state == NULL)
return NULL;
memset (state, 0, sizeof(dca_state_t));
state->samples = (sample_t *) memalign (16, 256 * 12 * sizeof (sample_t));
if (state->samples == NULL) {
free (state);
return NULL;
}
for (i = 0; i < 256 * 12; i++)
state->samples[i] = 0;
/* Pre-calculate cosine modulation coefficients */
pre_calc_cosmod( state );
state->downmixed = 1;
return state;
}
static av_cold int dca_decode_init(AVCodecContext * avctx)
{
DCAContext *s = avctx->priv_data;
s->avctx = avctx;
dca_init_vlcs();
pre_calc_cosmod(s);
dsputil_init(&s->dsp, avctx);
/* allow downmixing to stereo */
if (avctx->channels > 0 && avctx->request_channels < avctx->channels &&
avctx->request_channels == 2) {
avctx->channels = avctx->request_channels;
}
return 0;
}
