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142 lines
4.0 KiB
142 lines
4.0 KiB
/* |
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* Altivec 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 "config.h" |
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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/mem_internal.h" |
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#include "libavutil/ppc/cpu.h" |
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#include "libavutil/ppc/util_altivec.h" |
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#include "libavcodec/mpegaudiodsp.h" |
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#if HAVE_ALTIVEC |
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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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const vector float *win1a = (const vector float *) win1; |
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const vector float *win2a = (const vector float *) win2; |
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const vector float *bufa = (const vector float *) buf; |
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vector float *sum1a = (vector float *) sum1; |
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vector float *sum2a = (vector float *) sum2; |
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vector float av_uninit(v0), av_uninit(v4); |
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vector float v1, v2, v3; |
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len = len >> 2; |
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#define MULT(a, b) \ |
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{ \ |
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v1 = vec_ld(a, win1a); \ |
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v2 = vec_ld(b, win2a); \ |
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v3 = vec_ld(a, bufa); \ |
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v0 = vec_madd(v3, v1, v0); \ |
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v4 = vec_madd(v2, v3, v4); \ |
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} |
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while (len--) { |
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v0 = vec_xor(v0, v0); |
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v4 = vec_xor(v4, v4); |
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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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vec_st(v0, 0, sum1a); |
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vec_st(v4, 0, sum2a); |
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sum1a++; |
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sum2a++; |
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win1a++; |
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win2a++; |
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bufa++; |
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} |
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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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ptrdiff_t 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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int j; |
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float *out2 = out + 32 * incr; |
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/* copy to avoid wrap */ |
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memcpy(in + 512, in, 32 * sizeof(*in)); |
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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(MLSS, 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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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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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_ALTIVEC */ |
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av_cold void ff_mpadsp_init_ppc(MPADSPContext *s) |
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{ |
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#if HAVE_ALTIVEC |
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if (!PPC_ALTIVEC(av_get_cpu_flags())) |
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return; |
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s->apply_window_float = apply_window_mp3; |
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#endif /* HAVE_ALTIVEC */ |
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}
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