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https://github.com/FFmpeg/FFmpeg.git
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0544c95fd6
This silences -Wunused-variable when compiled with --disable-mmx, e.g http://fate.ffmpeg.org/log.cgi?time=20150919094617&log=compile&slot=x86_64-archlinux-gcc-disable-mmx. The alternative of header guards will make it far too ugly. Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
290 lines
10 KiB
C
290 lines
10 KiB
C
/*
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* SIMD-optimized MP3 decoding functions
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* Copyright (c) 2010 Vitor Sessak
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/internal.h"
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#include "libavutil/x86/asm.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/mpegaudiodsp.h"
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#define DECL(CPU)\
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static void imdct36_blocks_ ## CPU(float *out, float *buf, float *in, int count, int switch_point, int block_type);\
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void ff_imdct36_float_ ## CPU(float *out, float *buf, float *in, float *win);
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#if HAVE_YASM
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#if ARCH_X86_32
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DECL(sse)
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#endif
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DECL(sse2)
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DECL(sse3)
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DECL(ssse3)
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DECL(avx)
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#endif /* HAVE_YASM */
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void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win,
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float *tmpbuf);
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void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win,
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float *tmpbuf);
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DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40];
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#if HAVE_6REGS && HAVE_SSE_INLINE
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#define MACS(rt, ra, rb) rt+=(ra)*(rb)
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#define MLSS(rt, ra, rb) rt-=(ra)*(rb)
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#define SUM8(op, sum, w, p) \
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{ \
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op(sum, (w)[0 * 64], (p)[0 * 64]); \
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op(sum, (w)[1 * 64], (p)[1 * 64]); \
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op(sum, (w)[2 * 64], (p)[2 * 64]); \
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op(sum, (w)[3 * 64], (p)[3 * 64]); \
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op(sum, (w)[4 * 64], (p)[4 * 64]); \
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op(sum, (w)[5 * 64], (p)[5 * 64]); \
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op(sum, (w)[6 * 64], (p)[6 * 64]); \
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op(sum, (w)[7 * 64], (p)[7 * 64]); \
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}
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static void apply_window(const float *buf, const float *win1,
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const float *win2, float *sum1, float *sum2, int len)
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{
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x86_reg count = - 4*len;
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const float *win1a = win1+len;
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const float *win2a = win2+len;
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const float *bufa = buf+len;
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float *sum1a = sum1+len;
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float *sum2a = sum2+len;
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#define MULT(a, b) \
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"movaps " #a "(%1,%0), %%xmm1 \n\t" \
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"movaps " #a "(%3,%0), %%xmm2 \n\t" \
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"mulps %%xmm2, %%xmm1 \n\t" \
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"subps %%xmm1, %%xmm0 \n\t" \
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"mulps " #b "(%2,%0), %%xmm2 \n\t" \
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"subps %%xmm2, %%xmm4 \n\t" \
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__asm__ volatile(
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"1: \n\t"
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"xorps %%xmm0, %%xmm0 \n\t"
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"xorps %%xmm4, %%xmm4 \n\t"
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MULT( 0, 0)
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MULT( 256, 64)
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MULT( 512, 128)
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MULT( 768, 192)
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MULT(1024, 256)
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MULT(1280, 320)
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MULT(1536, 384)
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MULT(1792, 448)
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"movaps %%xmm0, (%4,%0) \n\t"
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"movaps %%xmm4, (%5,%0) \n\t"
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"add $16, %0 \n\t"
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"jl 1b \n\t"
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:"+&r"(count)
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:"r"(win1a), "r"(win2a), "r"(bufa), "r"(sum1a), "r"(sum2a)
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);
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#undef MULT
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}
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static void apply_window_mp3(float *in, float *win, int *unused, float *out,
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int incr)
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{
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LOCAL_ALIGNED_16(float, suma, [17]);
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LOCAL_ALIGNED_16(float, sumb, [17]);
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LOCAL_ALIGNED_16(float, sumc, [17]);
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LOCAL_ALIGNED_16(float, sumd, [17]);
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float sum;
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/* copy to avoid wrap */
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__asm__ volatile(
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"movaps 0(%0), %%xmm0 \n\t" \
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"movaps 16(%0), %%xmm1 \n\t" \
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"movaps 32(%0), %%xmm2 \n\t" \
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"movaps 48(%0), %%xmm3 \n\t" \
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"movaps %%xmm0, 0(%1) \n\t" \
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"movaps %%xmm1, 16(%1) \n\t" \
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"movaps %%xmm2, 32(%1) \n\t" \
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"movaps %%xmm3, 48(%1) \n\t" \
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"movaps 64(%0), %%xmm0 \n\t" \
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"movaps 80(%0), %%xmm1 \n\t" \
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"movaps 96(%0), %%xmm2 \n\t" \
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"movaps 112(%0), %%xmm3 \n\t" \
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"movaps %%xmm0, 64(%1) \n\t" \
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"movaps %%xmm1, 80(%1) \n\t" \
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"movaps %%xmm2, 96(%1) \n\t" \
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"movaps %%xmm3, 112(%1) \n\t"
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::"r"(in), "r"(in+512)
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:"memory"
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);
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apply_window(in + 16, win , win + 512, suma, sumc, 16);
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apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16);
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SUM8(MACS, suma[0], win + 32, in + 48);
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sumc[ 0] = 0;
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sumb[16] = 0;
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sumd[16] = 0;
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#define SUMS(suma, sumb, sumc, sumd, out1, out2) \
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"movups " #sumd "(%4), %%xmm0 \n\t" \
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"shufps $0x1b, %%xmm0, %%xmm0 \n\t" \
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"subps " #suma "(%1), %%xmm0 \n\t" \
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"movaps %%xmm0," #out1 "(%0) \n\t" \
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\
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"movups " #sumc "(%3), %%xmm0 \n\t" \
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"shufps $0x1b, %%xmm0, %%xmm0 \n\t" \
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"addps " #sumb "(%2), %%xmm0 \n\t" \
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"movaps %%xmm0," #out2 "(%0) \n\t"
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if (incr == 1) {
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__asm__ volatile(
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SUMS( 0, 48, 4, 52, 0, 112)
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SUMS(16, 32, 20, 36, 16, 96)
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SUMS(32, 16, 36, 20, 32, 80)
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SUMS(48, 0, 52, 4, 48, 64)
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:"+&r"(out)
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:"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0])
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:"memory"
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);
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out += 16*incr;
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} else {
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int j;
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float *out2 = out + 32 * incr;
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out[0 ] = -suma[ 0];
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out += incr;
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out2 -= incr;
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for(j=1;j<16;j++) {
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*out = -suma[ j] + sumd[16-j];
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*out2 = sumb[16-j] + sumc[ j];
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out += incr;
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out2 -= incr;
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}
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}
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sum = 0;
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SUM8(MLSS, sum, win + 16 + 32, in + 32);
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*out = sum;
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}
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#endif /* HAVE_6REGS && HAVE_SSE_INLINE */
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#if HAVE_YASM
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#define DECL_IMDCT_BLOCKS(CPU1, CPU2) \
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static void imdct36_blocks_ ## CPU1(float *out, float *buf, float *in, \
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int count, int switch_point, int block_type) \
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{ \
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int align_end = count - (count & 3); \
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int j; \
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for (j = 0; j < align_end; j+= 4) { \
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LOCAL_ALIGNED_16(float, tmpbuf, [1024]); \
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float *win = mdct_win_sse[switch_point && j < 4][block_type]; \
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/* apply window & overlap with previous buffer */ \
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\
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/* select window */ \
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ff_four_imdct36_float_ ## CPU2(out, buf, in, win, tmpbuf); \
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in += 4*18; \
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buf += 4*18; \
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out += 4; \
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} \
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for (; j < count; j++) { \
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/* apply window & overlap with previous buffer */ \
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\
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/* select window */ \
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int win_idx = (switch_point && j < 2) ? 0 : block_type; \
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float *win = ff_mdct_win_float[win_idx + (4 & -(j & 1))]; \
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\
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ff_imdct36_float_ ## CPU1(out, buf, in, win); \
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\
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in += 18; \
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buf++; \
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out++; \
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} \
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}
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#if HAVE_SSE
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#if ARCH_X86_32
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DECL_IMDCT_BLOCKS(sse,sse)
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#endif
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DECL_IMDCT_BLOCKS(sse2,sse)
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DECL_IMDCT_BLOCKS(sse3,sse)
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DECL_IMDCT_BLOCKS(ssse3,sse)
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#endif
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#if HAVE_AVX_EXTERNAL
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DECL_IMDCT_BLOCKS(avx,avx)
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#endif
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#endif /* HAVE_YASM */
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av_cold void ff_mpadsp_init_x86(MPADSPContext *s)
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{
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av_unused int cpu_flags = av_get_cpu_flags();
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int i, j;
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for (j = 0; j < 4; j++) {
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for (i = 0; i < 40; i ++) {
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mdct_win_sse[0][j][4*i ] = ff_mdct_win_float[j ][i];
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mdct_win_sse[0][j][4*i + 1] = ff_mdct_win_float[j + 4][i];
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mdct_win_sse[0][j][4*i + 2] = ff_mdct_win_float[j ][i];
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mdct_win_sse[0][j][4*i + 3] = ff_mdct_win_float[j + 4][i];
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mdct_win_sse[1][j][4*i ] = ff_mdct_win_float[0 ][i];
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mdct_win_sse[1][j][4*i + 1] = ff_mdct_win_float[4 ][i];
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mdct_win_sse[1][j][4*i + 2] = ff_mdct_win_float[j ][i];
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mdct_win_sse[1][j][4*i + 3] = ff_mdct_win_float[j + 4][i];
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}
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}
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#if HAVE_6REGS && HAVE_SSE_INLINE
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if (INLINE_SSE(cpu_flags)) {
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s->apply_window_float = apply_window_mp3;
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}
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#endif /* HAVE_SSE_INLINE */
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#if HAVE_YASM
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#if HAVE_SSE
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#if ARCH_X86_32
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if (EXTERNAL_SSE(cpu_flags)) {
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s->imdct36_blocks_float = imdct36_blocks_sse;
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}
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#endif
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if (EXTERNAL_SSE2(cpu_flags)) {
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s->imdct36_blocks_float = imdct36_blocks_sse2;
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}
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if (EXTERNAL_SSE3(cpu_flags)) {
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s->imdct36_blocks_float = imdct36_blocks_sse3;
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}
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if (EXTERNAL_SSSE3(cpu_flags)) {
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s->imdct36_blocks_float = imdct36_blocks_ssse3;
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}
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#endif
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#if HAVE_AVX_EXTERNAL
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if (EXTERNAL_AVX(cpu_flags)) {
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s->imdct36_blocks_float = imdct36_blocks_avx;
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}
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#endif
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#endif /* HAVE_YASM */
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}
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