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ffmpeg.wasm-core
Commit bcfa3e58 authored by Loren Merritt's avatar Loren Merritt
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3dnow2 implementation of imdct. 

6% faster vorbis and wma.

Originally committed as revision 5954 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 2c5ad5fd
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Showing with 93 additions and 7 deletions
libavcodec/dsputil.h
View file @ bcfa3e58
......@@ -594,6 +594,8 @@ void get_psnr(uint8_t *orig_image[3], uint8_t *coded_image[3],
FFTSample type */
typedef float FFTSample;
struct MDCTContext;
typedef struct FFTComplex {
FFTSample re, im;
} FFTComplex;
......@@ -605,6 +607,8 @@ typedef struct FFTContext {
FFTComplex *exptab;
FFTComplex *exptab1; /* only used by SSE code */
void (*fft_calc)(struct FFTContext *s, FFTComplex *z);
void (*imdct_calc)(struct MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
} FFTContext;
int ff_fft_init(FFTContext *s, int nbits, int inverse);
......@@ -635,6 +639,8 @@ typedef struct MDCTContext {
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_calc_3dn2(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp);
void ff_mdct_calc(MDCTContext *s, FFTSample *out,
const FFTSample *input, FFTSample *tmp);
void ff_mdct_end(MDCTContext *s);
......
libavcodec/fft.c
View file @ bcfa3e58
......@@ -54,6 +54,7 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
s->exptab[i].im = s1;
}
s->fft_calc = ff_fft_calc_c;
s->imdct_calc = ff_imdct_calc;
s->exptab1 = NULL;
/* compute constant table for HAVE_SSE version */
......@@ -62,11 +63,7 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
int has_vectors = 0;
#if defined(HAVE_MMX)
#ifdef HAVE_MM3DNOW
has_vectors = mm_support() & (MM_3DNOW | MM_3DNOWEXT | MM_SSE | MM_SSE2);
#else
has_vectors = mm_support() & (MM_SSE | MM_SSE2);
#endif
#endif
#if defined(HAVE_ALTIVEC) && !defined(ALTIVEC_USE_REFERENCE_C_CODE)
has_vectors = mm_support() & MM_ALTIVEC;
......@@ -98,6 +95,8 @@ int ff_fft_init(FFTContext *s, int nbits, int inverse)
} while (nblocks != 0);
av_freep(&s->exptab);
#if defined(HAVE_MMX)
if (has_vectors & MM_3DNOWEXT)
s->imdct_calc = ff_imdct_calc_3dn2;
#ifdef HAVE_MM3DNOW
if (has_vectors & MM_3DNOWEXT)
/* 3DNowEx for Athlon(XP) */
......
libavcodec/i386/fft_3dn2.c
View file @ bcfa3e58
/*
* FFT/MDCT transform with Extended 3DNow! optimizations
* Copyright (c) 2006 Zuxy MENG Jie.
* Copyright (c) 2006 Zuxy MENG Jie, Loren Merritt
* Based on fft_sse.c copyright (c) 2002 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
......@@ -134,3 +134,84 @@ void ff_fft_calc_3dn2(FFTContext *s, FFTComplex *z)
}
#endif
void ff_imdct_calc_3dn2(MDCTContext *s, FFTSample *output,
const FFTSample *input, FFTSample *tmp)
{
int k, n8, n4, n2, n;
const uint16_t *revtab = s->fft.revtab;
const FFTSample *tcos = s->tcos;
const FFTSample *tsin = s->tsin;
const FFTSample *in1, *in2;
FFTComplex *z = (FFTComplex *)tmp;
n = 1 << s->nbits;
n2 = n >> 1;
n4 = n >> 2;
n8 = n >> 3;
/* pre rotation */
in1 = input;
in2 = input + n2 - 1;
for(k = 0; k < n4; k++) {
asm volatile(
"movd %1, %%mm0 \n\t"
"movd %3, %%mm1 \n\t"
"punpckldq %2, %%mm0 \n\t"
"punpckldq %4, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"pfmul %%mm1, %%mm0 \n\t"
"pswapd %%mm1, %%mm1 \n\t"
"pfmul %%mm1, %%mm2 \n\t"
"pfpnacc %%mm2, %%mm0 \n\t"
"movq %%mm0, %0 \n\t"
:"=m"(z[revtab[k]])
:"m"(in2[-2*k]), "m"(in1[2*k]),
"m"(tcos[k]), "m"(tsin[k])
);
}
ff_fft_calc(&s->fft, z);
/* post rotation + reordering */
for(k = 0; k < n4; k++) {
asm volatile(
"movq %0, %%mm0 \n\t"
"movd %1, %%mm1 \n\t"
"punpckldq %2, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"pfmul %%mm1, %%mm0 \n\t"
"pswapd %%mm1, %%mm1 \n\t"
"pfmul %%mm1, %%mm2 \n\t"
"pfpnacc %%mm2, %%mm0 \n\t"
"movq %%mm0, %0 \n\t"
:"+m"(z[k])
:"m"(tcos[k]), "m"(tsin[k])
);
}
asm volatile("movd %0, %%mm7" ::"r"(1<<31));
for(k = 0; k < n8; k++) {
asm volatile(
"movq %4, %%mm0 \n\t"
"pswapd %5, %%mm1 \n\t"
"movq %%mm0, %%mm2 \n\t"
"pxor %%mm7, %%mm2 \n\t"
"punpckldq %%mm1, %%mm2 \n\t"
"pswapd %%mm2, %%mm3 \n\t"
"punpckhdq %%mm1, %%mm0 \n\t"
"pswapd %%mm0, %%mm4 \n\t"
"pxor %%mm7, %%mm0 \n\t"
"pxor %%mm7, %%mm4 \n\t"
"movq %%mm0, %0 \n\t" // { -z[n8+k].im, z[n8-1-k].re }
"movq %%mm4, %1 \n\t" // { -z[n8-1-k].re, z[n8+k].im }
"movq %%mm2, %2 \n\t" // { -z[n8+k].re, z[n8-1-k].im }
"movq %%mm3, %3 \n\t" // { z[n8-1-k].im, -z[n8+k].re }
:"=m"(output[2*k]), "=m"(output[n2-2-2*k]),
"=m"(output[n2+2*k]), "=m"(output[n-2-2*k])
:"m"(z[n8+k]), "m"(z[n8-1-k])
:"memory"
);
}
asm volatile("emms");
}
libavcodec/vorbis.c
View file @ bcfa3e58
......@@ -1598,7 +1598,7 @@ static int vorbis_parse_audio_packet(vorbis_context *vc) {
saved_start=vc->saved_start;
ff_imdct_calc(vc->modes[mode_number].blockflag ? &vc->mdct1 : &vc->mdct0, buf, ch_floor_ptr, buf_tmp);
vc->mdct0.fft.imdct_calc(vc->modes[mode_number].blockflag ? &vc->mdct1 : &vc->mdct0, buf, ch_floor_ptr, buf_tmp);
if (vc->modes[mode_number].blockflag) {
// -- overlap/add
......
libavcodec/wmadec.c
View file @ bcfa3e58
......@@ -1113,7 +1113,7 @@ static int wma_decode_block(WMADecodeContext *s)
n = s->block_len;
n4 = s->block_len / 2;
ff_imdct_calc(&s->mdct_ctx[bsize],
s->mdct_ctx[bsize].fft.imdct_calc(&s->mdct_ctx[bsize],
output, s->coefs[ch], s->mdct_tmp);
/* XXX: optimize all that by build the window and
......
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