shithub: opus

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ref: c95ab8ccb2f07773c7e8bfb6ef8322326a23a886
parent: 47c248a56acda48725d6dbbca732092e07397ee1
author: Jean-Marc Valin <[email protected]>
date: Wed Apr 23 14:03:46 EDT 2008 

mdct_overlap no longer needed


--- a/libcelt/celt.c
+++ b/libcelt/celt.c
@@ -72,7 +72,6 @@
    kiss_fftr_cfg fft;
 
    celt_sig_t *in_mem;
-   celt_sig_t *mdct_overlap;
    celt_sig_t *out_mem;
 
    celt_word16_t *oldBandE;
@@ -101,7 +100,6 @@
    st->fft = pitch_state_alloc(MAX_PERIOD);
    
    st->in_mem = celt_alloc(st->overlap*C*sizeof(celt_sig_t));
-   st->mdct_overlap = celt_alloc(st->overlap*C*sizeof(celt_sig_t));
    st->out_mem = celt_alloc((MAX_PERIOD+st->overlap)*C*sizeof(celt_sig_t));
 
    st->oldBandE = (celt_word16_t*)celt_alloc(C*mode->nbEBands*sizeof(celt_word16_t));
@@ -127,7 +125,6 @@
    pitch_state_free(st->fft);
 
    celt_free(st->in_mem);
-   celt_free(st->mdct_overlap);
    celt_free(st->out_mem);
    
    celt_free(st->oldBandE);
@@ -182,7 +179,7 @@
 }
 
 /** Compute the IMDCT and apply window for all sub-frames and all channels in a frame */
-static void compute_inv_mdcts(const CELTMode *mode, const celt_word16_t * restrict window, celt_sig_t *X, celt_sig_t * restrict out_mem, celt_sig_t * restrict mdct_overlap)
+static void compute_inv_mdcts(const CELTMode *mode, const celt_word16_t * restrict window, celt_sig_t *X, celt_sig_t * restrict out_mem)
 {
    int c, N4;
    const int C = CHANNELS(mode);
@@ -362,7 +359,7 @@
 
    CELT_MOVE(st->out_mem, st->out_mem+C*N, C*(MAX_PERIOD+st->overlap-N));
 
-   compute_inv_mdcts(st->mode, st->mode->window, freq, st->out_mem, st->mdct_overlap);
+   compute_inv_mdcts(st->mode, st->mode->window, freq, st->out_mem);
    /* De-emphasis and put everything back at the right place in the synthesis history */
 #ifndef SHORTCUTS
    for (c=0;c<C;c++)
@@ -439,7 +436,6 @@
 
    celt_sig_t * restrict preemph_memD;
 
-   celt_sig_t *mdct_overlap;
    celt_sig_t *out_mem;
 
    celt_word16_t *oldBandE;
@@ -464,7 +460,6 @@
    st->block_size = N;
    st->overlap = mode->overlap;
 
-   st->mdct_overlap = celt_alloc(st->overlap*C*sizeof(celt_sig_t));
    st->out_mem = celt_alloc((MAX_PERIOD+st->overlap)*C*sizeof(celt_sig_t));
    
    st->oldBandE = (celt_word16_t*)celt_alloc(C*mode->nbEBands*sizeof(celt_word16_t));
@@ -486,7 +481,6 @@
       return;
 
 
-   celt_free(st->mdct_overlap);
    celt_free(st->out_mem);
    
    celt_free(st->oldBandE);
@@ -515,7 +509,7 @@
 
    CELT_MOVE(st->out_mem, st->out_mem+C*N, C*(MAX_PERIOD-N));
    /* Compute inverse MDCTs */
-   compute_inv_mdcts(st->mode, st->mode->window, freq, st->out_mem, st->mdct_overlap);
+   compute_inv_mdcts(st->mode, st->mode->window, freq, st->out_mem);
 
    for (c=0;c<C;c++)
    {
@@ -619,7 +613,7 @@
 
    CELT_MOVE(st->out_mem, st->out_mem+C*N, C*(MAX_PERIOD+st->overlap-N));
    /* Compute inverse MDCTs */
-   compute_inv_mdcts(st->mode, st->mode->window, freq, st->out_mem, st->mdct_overlap);
+   compute_inv_mdcts(st->mode, st->mode->window, freq, st->out_mem);
 
    for (c=0;c<C;c++)
    {