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Code Issues Releases Activity

ac3enc: use dsputil functions in apply_window()

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Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Justin Ruggles 2011-01-13 15:28:06 -05:00 committed by Mans Rullgard
parent 6eabb0d3ad
commit 3b924294ea
3 changed files with 9 additions and 13 deletions
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4
libavcodec/ac3enc.c
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@ -161,7 +161,7 @@ static av_cold int mdct_init(AVCodecContext *avctx, AC3MDCTContext *mdct,
static void mdct512(AC3MDCTContext *mdct, CoefType *out, SampleType *in);
static void apply_window(SampleType *output, const SampleType *input,
static void apply_window(DSPContext *dsp, SampleType *output, const SampleType *input,
const SampleType *window, int n);
static int normalize_samples(AC3EncodeContext *s);
@ -262,7 +262,7 @@ static void apply_mdct(AC3EncodeContext *s)
AC3Block *block = &s->blocks[blk];
const SampleType *input_samples = &s->planar_samples[ch][blk * AC3_BLOCK_SIZE];
apply_window(s->windowed_samples, input_samples, s->mdct.window, AC3_WINDOW_SIZE);
apply_window(&s->dsp, s->windowed_samples, input_samples, s->mdct.window, AC3_WINDOW_SIZE);
block->exp_shift[ch] = normalize_samples(s);

2
libavcodec/ac3enc_fixed.c
View File

@ -251,7 +251,7 @@ static void mdct512(AC3MDCTContext *mdct, int32_t *out, int16_t *in)
/**
* Apply KBD window to input samples prior to MDCT.
*/
static void apply_window(int16_t *output, const int16_t *input,
static void apply_window(DSPContext *dsp, int16_t *output, const int16_t *input,
const int16_t *window, int n)
{
int i;

16
libavcodec/ac3enc_float.c
View File

@ -48,17 +48,19 @@ static av_cold int mdct_init(AVCodecContext *avctx, AC3MDCTContext *mdct,
int nbits)
{
float *window;
int n, n2;
int i, n, n2;
n = 1 << nbits;
n2 = n >> 1;
window = av_malloc(n2 * sizeof(*window));
window = av_malloc(n * sizeof(*window));
if (!window) {
av_log(avctx, AV_LOG_ERROR, "Cannot allocate memory.\n");
return AVERROR(ENOMEM);
}
ff_kbd_window_init(window, 5.0, n2);
for (i = 0; i < n2; i++)
window[n-1-i] = window[i];
mdct->window = window;
return ff_mdct_init(&mdct->fft, nbits, 0, -2.0 / n);
@ -79,16 +81,10 @@ static void mdct512(AC3MDCTContext *mdct, float *out, float *in)
/**
* Apply KBD window to input samples prior to MDCT.
*/
static void apply_window(float *output, const float *input,
static void apply_window(DSPContext *dsp, float *output, const float *input,
const float *window, int n)
{
int i;
int n2 = n >> 1;
for (i = 0; i < n2; i++) {
output[i] = input[i] * window[i];
output[n-i-1] = input[n-i-1] * window[i];
}
dsp->vector_fmul(output, input, window, n);
}