Revision 844ea46a libavcodec/fft.c
| libavcodec/fft.c | ||
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| 34 | 34 |
{
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| 35 | 35 |
int i, j, m, n; |
| 36 | 36 |
float alpha, c1, s1, s2; |
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int shuffle = 0; |
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int av_unused has_vectors; |
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| 37 | 39 |
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| 38 | 40 |
s->nbits = nbits; |
| 39 | 41 |
n = 1 << nbits; |
| ... | ... | |
| 59 | 61 |
s->imdct_calc = ff_imdct_calc; |
| 60 | 62 |
s->exptab1 = NULL; |
| 61 | 63 |
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/* compute constant table for HAVE_SSE version */
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#if defined(HAVE_MMX) \
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|| (defined(HAVE_ALTIVEC) && !defined(ALTIVEC_USE_REFERENCE_C_CODE))
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{
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int has_vectors = mm_support();
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if (has_vectors) {
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#if defined(HAVE_MMX)
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if (has_vectors & MM_3DNOWEXT) {
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/* 3DNowEx for K7/K8 */
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s->imdct_calc = ff_imdct_calc_3dn2;
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s->fft_calc = ff_fft_calc_3dn2;
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} else if (has_vectors & MM_3DNOW) {
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/* 3DNow! for K6-2/3 */
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s->fft_calc = ff_fft_calc_3dn;
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} else if (has_vectors & MM_SSE) {
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/* SSE for P3/P4 */
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s->imdct_calc = ff_imdct_calc_sse;
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s->fft_calc = ff_fft_calc_sse;
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}
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#else /* HAVE_MMX */
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if (has_vectors & MM_ALTIVEC)
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s->fft_calc = ff_fft_calc_altivec;
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#ifdef HAVE_MMX
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has_vectors = mm_support();
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shuffle = 1;
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if (has_vectors & MM_3DNOWEXT) {
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/* 3DNowEx for K7/K8 */
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s->imdct_calc = ff_imdct_calc_3dn2; |
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s->fft_calc = ff_fft_calc_3dn2;
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} else if (has_vectors & MM_3DNOW) {
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/* 3DNow! for K6-2/3 */
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s->fft_calc = ff_fft_calc_3dn;
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} else if (has_vectors & MM_SSE) {
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/* SSE for P3/P4 */
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s->imdct_calc = ff_imdct_calc_sse;
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s->fft_calc = ff_fft_calc_sse;
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} else {
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shuffle = 0;
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}
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#elif defined HAVE_ALTIVEC && !defined ALTIVEC_USE_REFERENCE_C_CODE
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has_vectors = mm_support();
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if (has_vectors & MM_ALTIVEC) {
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s->fft_calc = ff_fft_calc_altivec;
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shuffle = 1;
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}
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| 85 | 87 |
#endif |
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} |
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if (s->fft_calc != ff_fft_calc_c) {
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/* compute constant table for HAVE_SSE version */ |
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if (shuffle) {
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| 88 | 91 |
int np, nblocks, np2, l; |
| 89 | 92 |
FFTComplex *q; |
| 90 | 93 |
|
| ... | ... | |
| 111 | 114 |
} while (nblocks != 0); |
| 112 | 115 |
av_freep(&s->exptab); |
| 113 | 116 |
} |
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} |
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#endif |
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| 116 | 117 |
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| 117 | 118 |
/* compute bit reverse table */ |
| 118 | 119 |
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