diff options
Diffstat (limited to 'libavcodec/x86/mpegaudiodec_mmx.c')
| -rw-r--r-- | libavcodec/x86/mpegaudiodec_mmx.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/libavcodec/x86/mpegaudiodec_mmx.c b/libavcodec/x86/mpegaudiodec_mmx.c new file mode 100644 index 0000000000..39122b8812 --- /dev/null +++ b/libavcodec/x86/mpegaudiodec_mmx.c @@ -0,0 +1,156 @@ +/* + * MMX optimized MP3 decoding functions + * Copyright (c) 2010 Vitor Sessak + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/x86_cpu.h" + +#define CONFIG_FLOAT 1 +#include "libavcodec/mpegaudio.h" + +#define MACS(rt, ra, rb) rt+=(ra)*(rb) +#define MLSS(rt, ra, rb) rt-=(ra)*(rb) + +#define SUM8(op, sum, w, p) \ +{ \ + op(sum, (w)[0 * 64], (p)[0 * 64]); \ + op(sum, (w)[1 * 64], (p)[1 * 64]); \ + op(sum, (w)[2 * 64], (p)[2 * 64]); \ + op(sum, (w)[3 * 64], (p)[3 * 64]); \ + op(sum, (w)[4 * 64], (p)[4 * 64]); \ + op(sum, (w)[5 * 64], (p)[5 * 64]); \ + op(sum, (w)[6 * 64], (p)[6 * 64]); \ + op(sum, (w)[7 * 64], (p)[7 * 64]); \ +} + +static void apply_window(const float *buf, const float *win1, + const float *win2, float *sum1, float *sum2, int len) +{ + x86_reg count = - 4*len; + const float *win1a = win1+len; + const float *win2a = win2+len; + const float *bufa = buf+len; + float *sum1a = sum1+len; + float *sum2a = sum2+len; + + +#define MULT(a, b) \ + "movaps " #a "(%0,%5), %%xmm1 \n\t" \ + "movaps " #a "(%2,%5), %%xmm2 \n\t" \ + "mulps %%xmm2, %%xmm1 \n\t" \ + "subps %%xmm1, %%xmm0 \n\t" \ + "mulps " #b "(%1,%5), %%xmm2 \n\t" \ + "subps %%xmm2, %%xmm4 \n\t" \ + + __asm__ volatile( + "1: \n\t" + "xorps %%xmm0, %%xmm0 \n\t" + "xorps %%xmm4, %%xmm4 \n\t" + + MULT( 0, 0) + MULT( 256, 64) + MULT( 512, 128) + MULT( 768, 192) + MULT(1024, 256) + MULT(1280, 320) + MULT(1536, 384) + MULT(1792, 448) + + "movaps %%xmm0, (%3,%5) \n\t" + "movaps %%xmm4, (%4,%5) \n\t" + "addl $16, %5 \n\t" + "jl 1b \n\t" + :"+&r"(win1a), "+&r"(win2a), "+&r"(bufa), "+&r"(sum1a), "+&r"(sum2a), "+&r"(count) + ); + +#undef MULT +} + +static void apply_window_mp3(float *in, float *win, int *unused, float *out, + int incr) +{ + LOCAL_ALIGNED_16(float, suma, [17]); + LOCAL_ALIGNED_16(float, sumb, [17]); + LOCAL_ALIGNED_16(float, sumc, [17]); + LOCAL_ALIGNED_16(float, sumd, [17]); + + float sum; + + /* copy to avoid wrap */ + memcpy(in + 512, in, 32 * sizeof(*in)); + + apply_window(in + 16, win , win + 512, suma, sumc, 16); + apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16); + + SUM8(MACS, suma[0], win + 32, in + 48); + + sumc[ 0] = 0; + sumb[16] = 0; + sumd[16] = 0; + +#define SUMS(suma, sumb, sumc, sumd, out1, out2) \ + "movups " #sumd "(%4), %%xmm0 \n\t" \ + "shufps $0x1b, %%xmm0, %%xmm0 \n\t" \ + "subps " #suma "(%1), %%xmm0 \n\t" \ + "movaps %%xmm0," #out1 "(%0) \n\t" \ +\ + "movups " #sumc "(%3), %%xmm0 \n\t" \ + "shufps $0x1b, %%xmm0, %%xmm0 \n\t" \ + "addps " #sumb "(%2), %%xmm0 \n\t" \ + "movaps %%xmm0," #out2 "(%0) \n\t" + + if (incr == 1) { + __asm__ volatile( + SUMS( 0, 48, 4, 52, 0, 112) + SUMS(16, 32, 20, 36, 16, 96) + SUMS(32, 16, 36, 20, 32, 80) + SUMS(48, 0, 52, 4, 48, 64) + + :"+&r"(out) + :"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0]) + :"memory" + ); + out += 16*incr; + } else { + int j; + float *out2 = out + 32 * incr; + out[0 ] = -suma[ 0]; + out += incr; + out2 -= incr; + for(j=1;j<16;j++) { + *out = -suma[ j] + sumd[16-j]; + *out2 = sumb[16-j] + sumc[ j]; + out += incr; + out2 -= incr; + } + } + + sum = 0; + SUM8(MLSS, sum, win + 16 + 32, in + 32); + *out = sum; +} + +void ff_mpegaudiodec_init_mmx(MPADecodeContext *s) +{ + mm_flags = mm_support(); + + if (mm_flags & FF_MM_SSE2) { + s->apply_window_mp3 = apply_window_mp3; + } +} |