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optimize imdct_half:

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remove tmp buffer.
skip fft reinterleave pass, leaving data in a format more convenient for simd.
merge post-rotate with post-reorder.

Originally committed as revision 14700 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Loren Merritt
2008-08-12 00:33:34 +00:00
parent 49c0dd754c
commit 46803f4f67
6 changed files with 248 additions and 359 deletions
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14
libavcodec/dsputil.h
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@ -645,7 +645,7 @@ typedef struct FFTContext {
void (*imdct_calc)(struct MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void (*imdct_half)(struct MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
const FFTSample *input);
} FFTContext;
int ff_fft_init(FFTContext *s, int nbits, int inverse);
@ -696,16 +696,16 @@ void ff_sine_window_init(float *window, int n);
int ff_mdct_init(MDCTContext *s, int nbits, int inverse);
void ff_imdct_calc(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half(MDCTContext *s, FFTSample *output, const FFTSample *input);
void ff_imdct_calc_3dn(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half_3dn(MDCTContext *s, FFTSample *output, const FFTSample *input);
void ff_imdct_calc_3dn2(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half_3dn2(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half_3dn2(MDCTContext *s, FFTSample *output, const FFTSample *input);
void ff_imdct_calc_sse(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half_sse(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_imdct_half_sse(MDCTContext *s, FFTSample *output, const FFTSample *input);
void ff_mdct_calc(MDCTContext *s, FFTSample *out,
const FFTSample *input, FFTSample *tmp);
void ff_mdct_end(MDCTContext *s);