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ac3enc: use dsputil functions in apply_window()
Signed-off-by: Mans Rullgard <mans@mansr.com>
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@ -161,7 +161,7 @@ static av_cold int mdct_init(AVCodecContext *avctx, AC3MDCTContext *mdct,
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static void mdct512(AC3MDCTContext *mdct, CoefType *out, SampleType *in);
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static void apply_window(SampleType *output, const SampleType *input,
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static void apply_window(DSPContext *dsp, SampleType *output, const SampleType *input,
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const SampleType *window, int n);
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static int normalize_samples(AC3EncodeContext *s);
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@ -262,7 +262,7 @@ static void apply_mdct(AC3EncodeContext *s)
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AC3Block *block = &s->blocks[blk];
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const SampleType *input_samples = &s->planar_samples[ch][blk * AC3_BLOCK_SIZE];
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apply_window(s->windowed_samples, input_samples, s->mdct.window, AC3_WINDOW_SIZE);
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apply_window(&s->dsp, s->windowed_samples, input_samples, s->mdct.window, AC3_WINDOW_SIZE);
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block->exp_shift[ch] = normalize_samples(s);
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@ -251,7 +251,7 @@ static void mdct512(AC3MDCTContext *mdct, int32_t *out, int16_t *in)
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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(int16_t *output, const int16_t *input,
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static void apply_window(DSPContext *dsp, int16_t *output, const int16_t *input,
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const int16_t *window, int n)
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{
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int i;
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@ -48,17 +48,19 @@ static av_cold int mdct_init(AVCodecContext *avctx, AC3MDCTContext *mdct,
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int nbits)
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{
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float *window;
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int n, n2;
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int i, n, n2;
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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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@ -79,16 +81,10 @@ static void mdct512(AC3MDCTContext *mdct, float *out, float *in)
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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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