FFmpeg
mpegaudiodsp.c
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1 /*
2  * SIMD-optimized MP3 decoding functions
3  * Copyright (c) 2010 Vitor Sessak
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stddef.h>
23 
24 #include "config.h"
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavutil/mem_internal.h"
28 #include "libavutil/x86/asm.h"
29 #include "libavutil/x86/cpu.h"
31 
32 #define DECL(CPU)\
33 static void imdct36_blocks_ ## CPU(float *out, float *buf, float *in, int count, int switch_point, int block_type);\
34 void ff_imdct36_float_ ## CPU(float *out, float *buf, float *in, float *win);
35 
36 #if HAVE_X86ASM
37 #if ARCH_X86_32
38 DECL(sse)
39 #endif
40 DECL(sse2)
41 DECL(sse3)
42 DECL(ssse3)
43 DECL(avx)
44 #endif /* HAVE_X86ASM */
45 
46 void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win,
47  float *tmpbuf);
48 void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win,
49  float *tmpbuf);
50 
51 DECLARE_ALIGNED(16, static float, mdct_win_sse)[2][4][4*40];
52 
53 #if HAVE_6REGS && HAVE_SSE_INLINE
54 
55 #define MACS(rt, ra, rb) rt+=(ra)*(rb)
56 #define MLSS(rt, ra, rb) rt-=(ra)*(rb)
57 
58 #define SUM8(op, sum, w, p) \
59 { \
60  op(sum, (w)[0 * 64], (p)[0 * 64]); \
61  op(sum, (w)[1 * 64], (p)[1 * 64]); \
62  op(sum, (w)[2 * 64], (p)[2 * 64]); \
63  op(sum, (w)[3 * 64], (p)[3 * 64]); \
64  op(sum, (w)[4 * 64], (p)[4 * 64]); \
65  op(sum, (w)[5 * 64], (p)[5 * 64]); \
66  op(sum, (w)[6 * 64], (p)[6 * 64]); \
67  op(sum, (w)[7 * 64], (p)[7 * 64]); \
68 }
69 
70 static void apply_window(const float *buf, const float *win1,
71  const float *win2, float *sum1, float *sum2, int len)
72 {
73  x86_reg count = - 4*len;
74  const float *win1a = win1+len;
75  const float *win2a = win2+len;
76  const float *bufa = buf+len;
77  float *sum1a = sum1+len;
78  float *sum2a = sum2+len;
79 
80 
81 #define MULT(a, b) \
82  "movaps " #a "(%1,%0), %%xmm1 \n\t" \
83  "movaps " #a "(%3,%0), %%xmm2 \n\t" \
84  "mulps %%xmm2, %%xmm1 \n\t" \
85  "subps %%xmm1, %%xmm0 \n\t" \
86  "mulps " #b "(%2,%0), %%xmm2 \n\t" \
87  "subps %%xmm2, %%xmm4 \n\t" \
88 
89  __asm__ volatile(
90  "1: \n\t"
91  "xorps %%xmm0, %%xmm0 \n\t"
92  "xorps %%xmm4, %%xmm4 \n\t"
93 
94  MULT( 0, 0)
95  MULT( 256, 64)
96  MULT( 512, 128)
97  MULT( 768, 192)
98  MULT(1024, 256)
99  MULT(1280, 320)
100  MULT(1536, 384)
101  MULT(1792, 448)
102 
103  "movaps %%xmm0, (%4,%0) \n\t"
104  "movaps %%xmm4, (%5,%0) \n\t"
105  "add $16, %0 \n\t"
106  "jl 1b \n\t"
107  :"+&r"(count)
108  :"r"(win1a), "r"(win2a), "r"(bufa), "r"(sum1a), "r"(sum2a)
109  );
110 
111 #undef MULT
112 }
113 
114 static void apply_window_mp3(float *in, float *win, int *unused, float *out,
115  ptrdiff_t incr)
116 {
117  LOCAL_ALIGNED_16(float, suma, [17]);
118  LOCAL_ALIGNED_16(float, sumb, [17]);
119  LOCAL_ALIGNED_16(float, sumc, [17]);
120  LOCAL_ALIGNED_16(float, sumd, [17]);
121 
122  float sum;
123 
124  /* copy to avoid wrap */
125  __asm__ volatile(
126  "movaps 0(%0), %%xmm0 \n\t" \
127  "movaps 16(%0), %%xmm1 \n\t" \
128  "movaps 32(%0), %%xmm2 \n\t" \
129  "movaps 48(%0), %%xmm3 \n\t" \
130  "movaps %%xmm0, 0(%1) \n\t" \
131  "movaps %%xmm1, 16(%1) \n\t" \
132  "movaps %%xmm2, 32(%1) \n\t" \
133  "movaps %%xmm3, 48(%1) \n\t" \
134  "movaps 64(%0), %%xmm0 \n\t" \
135  "movaps 80(%0), %%xmm1 \n\t" \
136  "movaps 96(%0), %%xmm2 \n\t" \
137  "movaps 112(%0), %%xmm3 \n\t" \
138  "movaps %%xmm0, 64(%1) \n\t" \
139  "movaps %%xmm1, 80(%1) \n\t" \
140  "movaps %%xmm2, 96(%1) \n\t" \
141  "movaps %%xmm3, 112(%1) \n\t"
142  ::"r"(in), "r"(in+512)
143  :"memory"
144  );
145 
146  apply_window(in + 16, win , win + 512, suma, sumc, 16);
147  apply_window(in + 32, win + 48, win + 640, sumb, sumd, 16);
148 
149  SUM8(MACS, suma[0], win + 32, in + 48);
150 
151  sumc[ 0] = 0;
152  sumb[16] = 0;
153  sumd[16] = 0;
154 
155 #define SUMS(suma, sumb, sumc, sumd, out1, out2) \
156  "movups " #sumd "(%4), %%xmm0 \n\t" \
157  "shufps $0x1b, %%xmm0, %%xmm0 \n\t" \
158  "subps " #suma "(%1), %%xmm0 \n\t" \
159  "movaps %%xmm0," #out1 "(%0) \n\t" \
160 \
161  "movups " #sumc "(%3), %%xmm0 \n\t" \
162  "shufps $0x1b, %%xmm0, %%xmm0 \n\t" \
163  "addps " #sumb "(%2), %%xmm0 \n\t" \
164  "movaps %%xmm0," #out2 "(%0) \n\t"
165 
166  if (incr == 1) {
167  __asm__ volatile(
168  SUMS( 0, 48, 4, 52, 0, 112)
169  SUMS(16, 32, 20, 36, 16, 96)
170  SUMS(32, 16, 36, 20, 32, 80)
171  SUMS(48, 0, 52, 4, 48, 64)
172 
173  :"+&r"(out)
174  :"r"(&suma[0]), "r"(&sumb[0]), "r"(&sumc[0]), "r"(&sumd[0])
175  :"memory"
176  );
177  out += 16*incr;
178  } else {
179  int j;
180  float *out2 = out + 32 * incr;
181  out[0 ] = -suma[ 0];
182  out += incr;
183  out2 -= incr;
184  for(j=1;j<16;j++) {
185  *out = -suma[ j] + sumd[16-j];
186  *out2 = sumb[16-j] + sumc[ j];
187  out += incr;
188  out2 -= incr;
189  }
190  }
191 
192  sum = 0;
193  SUM8(MLSS, sum, win + 16 + 32, in + 32);
194  *out = sum;
195 }
196 
197 #endif /* HAVE_6REGS && HAVE_SSE_INLINE */
198 
199 #if HAVE_X86ASM
200 #define DECL_IMDCT_BLOCKS(CPU1, CPU2) \
201 static void imdct36_blocks_ ## CPU1(float *out, float *buf, float *in, \
202  int count, int switch_point, int block_type) \
203 { \
204  int align_end = count - (count & 3); \
205  int j; \
206  for (j = 0; j < align_end; j+= 4) { \
207  LOCAL_ALIGNED_16(float, tmpbuf, [1024]); \
208  float *win = mdct_win_sse[switch_point && j < 4][block_type]; \
209  /* apply window & overlap with previous buffer */ \
210  \
211  /* select window */ \
212  ff_four_imdct36_float_ ## CPU2(out, buf, in, win, tmpbuf); \
213  in += 4*18; \
214  buf += 4*18; \
215  out += 4; \
216  } \
217  for (; j < count; j++) { \
218  /* apply window & overlap with previous buffer */ \
219  \
220  /* select window */ \
221  int win_idx = (switch_point && j < 2) ? 0 : block_type; \
222  float *win = ff_mdct_win_float[win_idx + (4 & -(j & 1))]; \
223  \
224  ff_imdct36_float_ ## CPU1(out, buf, in, win); \
225  \
226  in += 18; \
227  buf++; \
228  out++; \
229  } \
230 }
231 
232 #if HAVE_SSE
233 #if ARCH_X86_32
234 DECL_IMDCT_BLOCKS(sse,sse)
235 #endif
236 DECL_IMDCT_BLOCKS(sse2,sse)
237 DECL_IMDCT_BLOCKS(sse3,sse)
238 DECL_IMDCT_BLOCKS(ssse3,sse)
239 #endif
240 #if HAVE_AVX_EXTERNAL
241 DECL_IMDCT_BLOCKS(avx,avx)
242 #endif
243 #endif /* HAVE_X86ASM */
244 
246 {
247  int i, j;
248  for (j = 0; j < 4; j++) {
249  for (i = 0; i < 40; i ++) {
250  mdct_win_sse[0][j][4*i ] = ff_mdct_win_float[j ][i];
251  mdct_win_sse[0][j][4*i + 1] = ff_mdct_win_float[j + 4][i];
252  mdct_win_sse[0][j][4*i + 2] = ff_mdct_win_float[j ][i];
253  mdct_win_sse[0][j][4*i + 3] = ff_mdct_win_float[j + 4][i];
254  mdct_win_sse[1][j][4*i ] = ff_mdct_win_float[0 ][i];
255  mdct_win_sse[1][j][4*i + 1] = ff_mdct_win_float[4 ][i];
256  mdct_win_sse[1][j][4*i + 2] = ff_mdct_win_float[j ][i];
257  mdct_win_sse[1][j][4*i + 3] = ff_mdct_win_float[j + 4][i];
258  }
259  }
260 }
261 
263 {
265 
266 #if HAVE_6REGS && HAVE_SSE_INLINE
267  if (INLINE_SSE(cpu_flags)) {
268  s->apply_window_float = apply_window_mp3;
269  }
270 #endif /* HAVE_SSE_INLINE */
271 
272 #if HAVE_X86ASM
273 #if HAVE_SSE
274 #if ARCH_X86_32
275  if (EXTERNAL_SSE(cpu_flags)) {
276  s->imdct36_blocks_float = imdct36_blocks_sse;
277  }
278 #endif
279  if (EXTERNAL_SSE2(cpu_flags)) {
280  s->imdct36_blocks_float = imdct36_blocks_sse2;
281  }
282  if (EXTERNAL_SSE3(cpu_flags)) {
283  s->imdct36_blocks_float = imdct36_blocks_sse3;
284  }
285  if (EXTERNAL_SSSE3(cpu_flags)) {
286  s->imdct36_blocks_float = imdct36_blocks_ssse3;
287  }
288 #endif
289 #if HAVE_AVX_EXTERNAL
290  if (EXTERNAL_AVX(cpu_flags)) {
291  s->imdct36_blocks_float = imdct36_blocks_avx;
292  }
293 #endif
294 #endif /* HAVE_X86ASM */
295 }
cpu.h
r
const char * r
Definition: vf_curves.c:116
ff_four_imdct36_float_avx
void ff_four_imdct36_float_avx(float *out, float *buf, float *in, float *win, float *tmpbuf)
mem_internal.h
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FILE * out
Definition: movenc.c:54
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#define av_unused
Definition: attributes.h:131
MPADSPContext
Definition: mpegaudiodsp.h:27
ff_mpadsp_init_x86
av_cold void ff_mpadsp_init_x86(MPADSPContext *s)
Definition: mpegaudiodsp.c:262
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int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:100
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static atomic_int cpu_flags
Definition: cpu.c:52
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static float win(SuperEqualizerContext *s, float n, int N)
Definition: af_superequalizer.c:119
MACS
#define MACS(rt, ra, rb)
Definition: mpegaudiodsp_template.c:65
SUM8
#define SUM8(op, sum, w, p)
Definition: mpegaudiodsp_template.c:82
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#define av_cold
Definition: attributes.h:90
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#define s(width, name)
Definition: cbs_vp9.c:256
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#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
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static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, int stride)
Definition: mpegvideo_enc.c:2541
INLINE_SSE
#define INLINE_SSE(flags)
Definition: cpu.h:89
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#define LOCAL_ALIGNED_16(t, v,...)
Definition: mem_internal.h:130
EXTERNAL_SSE3
#define EXTERNAL_SSE3(flags)
Definition: cpu.h:62
ff_four_imdct36_float_sse
void ff_four_imdct36_float_sse(float *out, float *buf, float *in, float *win, float *tmpbuf)
cpu.h
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#define MLSS(rt, ra, rb)
Definition: mpegaudiodsp_template.c:66
asm.h
MULT
#define MULT(c, x, n)
Definition: xvididct.c:145
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#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
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#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:116
DECL
#define DECL(CPU)
Definition: mpegaudiodsp.c:32
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#define i(width, name, range_min, range_max)
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static void(*const apply_window[4])(AVFloatDSPContext *fdsp, SingleChannelElement *sce, const float *audio)
Definition: aacenc.c:192
else
else
Definition: snow.txt:125
len
int len
Definition: vorbis_enc_data.h:426
__asm__
__asm__(".macro parse_r var r\n\t" "\\var = -1\n\t" _IFC_REG(0) _IFC_REG(1) _IFC_REG(2) _IFC_REG(3) _IFC_REG(4) _IFC_REG(5) _IFC_REG(6) _IFC_REG(7) _IFC_REG(8) _IFC_REG(9) _IFC_REG(10) _IFC_REG(11) _IFC_REG(12) _IFC_REG(13) _IFC_REG(14) _IFC_REG(15) _IFC_REG(16) _IFC_REG(17) _IFC_REG(18) _IFC_REG(19) _IFC_REG(20) _IFC_REG(21) _IFC_REG(22) _IFC_REG(23) _IFC_REG(24) _IFC_REG(25) _IFC_REG(26) _IFC_REG(27) _IFC_REG(28) _IFC_REG(29) _IFC_REG(30) _IFC_REG(31) ".iflt \\var\n\t" ".error \"Unable to parse register name \\r\"\n\t" ".endif\n\t" ".endm")
EXTERNAL_AVX
#define EXTERNAL_AVX(flags)
Definition: cpu.h:70
mdct_win_sse
static float mdct_win_sse[2][4][4 *40]
Definition: mpegaudiodsp.c:51
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av_cold void ff_mpadsp_init_x86_tabs(void)
Definition: mpegaudiodsp.c:245
mpegaudiodsp.h
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float ff_mdct_win_float[8][MDCT_BUF_SIZE]
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int x86_reg
Definition: asm.h:72
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65