Revision eddf8f41 libavcodec/ac3enc_float.c

View differences:

libavcodec/ac3enc_float.c
48 48 
                             int nbits)
49 49 
{
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    float *window;
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    int n, n2;
51 
    int i, n, n2;
52 52 

  		




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    n  = 1 << nbits;


  		




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    n2 = n >> 1;


  		




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    window = av_malloc(n2 * sizeof(*window));


  		




  
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    window = av_malloc(n * sizeof(*window));


  		




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    if (!window) {


  		




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        av_log(avctx, AV_LOG_ERROR, "Cannot allocate memory.\n");


  		




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        return AVERROR(ENOMEM);


  		




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    }


  		




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    ff_kbd_window_init(window, 5.0, n2);


  		




  
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    for (i = 0; i < n2; i++)


  		




  
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        window[n-1-i] = window[i];


  		




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    mdct->window = window;


  		




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    return ff_mdct_init(&mdct->fft, nbits, 0, -2.0 / n);


  		




  ......




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/**


  		




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 * Apply KBD window to input samples prior to MDCT.


  		




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 */


  		




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static void apply_window(float *output, const float *input,


  		




  
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static void apply_window(DSPContext *dsp, float *output, const float *input,


  		




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                         const float *window, int n)


  		




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{


  		




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    int i;


  		




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    int n2 = n >> 1;


  		




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    for (i = 0; i < n2; i++) {


  		




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        output[i]     = input[i]     * window[i];


  		




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        output[n-i-1] = input[n-i-1] * window[i];


  		




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    }


  		




  
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    dsp->vector_fmul(output, input, window, n);


  		




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}


  		




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