FFmpeg
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mpegvideoenc.c
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1 /*
2  * The simplest mpeg encoder (well, it was the simplest!)
3  * Copyright (c) 2000,2001 Fabrice Bellard
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 "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/asm.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavcodec/avcodec.h"
27 #include "libavcodec/dct.h"
28 #include "libavcodec/mpegvideo.h"
29 
30 /* not permutated inverse zigzag_direct + 1 for MMX quantizer */
31 DECLARE_ALIGNED(16, static uint16_t, inv_zigzag_direct16)[64];
32 
33 #if HAVE_6REGS
34 
35 #if HAVE_MMX_INLINE
36 #define COMPILE_TEMPLATE_MMXEXT 0
37 #define COMPILE_TEMPLATE_SSE2 0
38 #define COMPILE_TEMPLATE_SSSE3 0
39 #define RENAME(a) a ## _mmx
40 #define RENAME_FDCT(a) a ## _mmx
41 #include "mpegvideoenc_template.c"
42 #endif /* HAVE_MMX_INLINE */
43 
44 #if HAVE_MMXEXT_INLINE
45 #undef COMPILE_TEMPLATE_SSSE3
46 #undef COMPILE_TEMPLATE_SSE2
47 #undef COMPILE_TEMPLATE_MMXEXT
48 #define COMPILE_TEMPLATE_MMXEXT 1
49 #define COMPILE_TEMPLATE_SSE2 0
50 #define COMPILE_TEMPLATE_SSSE3 0
51 #undef RENAME
52 #undef RENAME_FDCT
53 #define RENAME(a) a ## _mmxext
54 #define RENAME_FDCT(a) a ## _mmxext
55 #include "mpegvideoenc_template.c"
56 #endif /* HAVE_MMXEXT_INLINE */
57 
58 #if HAVE_SSE2_INLINE
59 #undef COMPILE_TEMPLATE_MMXEXT
60 #undef COMPILE_TEMPLATE_SSE2
61 #undef COMPILE_TEMPLATE_SSSE3
62 #define COMPILE_TEMPLATE_MMXEXT 0
63 #define COMPILE_TEMPLATE_SSE2 1
64 #define COMPILE_TEMPLATE_SSSE3 0
65 #undef RENAME
66 #undef RENAME_FDCT
67 #define RENAME(a) a ## _sse2
68 #define RENAME_FDCT(a) a ## _sse2
69 #include "mpegvideoenc_template.c"
70 #endif /* HAVE_SSE2_INLINE */
71 
72 #if HAVE_SSSE3_INLINE
73 #undef COMPILE_TEMPLATE_MMXEXT
74 #undef COMPILE_TEMPLATE_SSE2
75 #undef COMPILE_TEMPLATE_SSSE3
76 #define COMPILE_TEMPLATE_MMXEXT 0
77 #define COMPILE_TEMPLATE_SSE2 1
78 #define COMPILE_TEMPLATE_SSSE3 1
79 #undef RENAME
80 #undef RENAME_FDCT
81 #define RENAME(a) a ## _ssse3
82 #define RENAME_FDCT(a) a ## _sse2
83 #include "mpegvideoenc_template.c"
84 #endif /* HAVE_SSSE3_INLINE */
85 
86 #endif /* HAVE_6REGS */
87 
88 #if HAVE_INLINE_ASM
89 static void denoise_dct_mmx(MpegEncContext *s, int16_t *block){
90  const int intra= s->mb_intra;
91  int *sum= s->dct_error_sum[intra];
92  uint16_t *offset= s->dct_offset[intra];
93 
94  s->dct_count[intra]++;
95 
96  __asm__ volatile(
97  "pxor %%mm7, %%mm7 \n\t"
98  "1: \n\t"
99  "pxor %%mm0, %%mm0 \n\t"
100  "pxor %%mm1, %%mm1 \n\t"
101  "movq (%0), %%mm2 \n\t"
102  "movq 8(%0), %%mm3 \n\t"
103  "pcmpgtw %%mm2, %%mm0 \n\t"
104  "pcmpgtw %%mm3, %%mm1 \n\t"
105  "pxor %%mm0, %%mm2 \n\t"
106  "pxor %%mm1, %%mm3 \n\t"
107  "psubw %%mm0, %%mm2 \n\t"
108  "psubw %%mm1, %%mm3 \n\t"
109  "movq %%mm2, %%mm4 \n\t"
110  "movq %%mm3, %%mm5 \n\t"
111  "psubusw (%2), %%mm2 \n\t"
112  "psubusw 8(%2), %%mm3 \n\t"
113  "pxor %%mm0, %%mm2 \n\t"
114  "pxor %%mm1, %%mm3 \n\t"
115  "psubw %%mm0, %%mm2 \n\t"
116  "psubw %%mm1, %%mm3 \n\t"
117  "movq %%mm2, (%0) \n\t"
118  "movq %%mm3, 8(%0) \n\t"
119  "movq %%mm4, %%mm2 \n\t"
120  "movq %%mm5, %%mm3 \n\t"
121  "punpcklwd %%mm7, %%mm4 \n\t"
122  "punpckhwd %%mm7, %%mm2 \n\t"
123  "punpcklwd %%mm7, %%mm5 \n\t"
124  "punpckhwd %%mm7, %%mm3 \n\t"
125  "paddd (%1), %%mm4 \n\t"
126  "paddd 8(%1), %%mm2 \n\t"
127  "paddd 16(%1), %%mm5 \n\t"
128  "paddd 24(%1), %%mm3 \n\t"
129  "movq %%mm4, (%1) \n\t"
130  "movq %%mm2, 8(%1) \n\t"
131  "movq %%mm5, 16(%1) \n\t"
132  "movq %%mm3, 24(%1) \n\t"
133  "add $16, %0 \n\t"
134  "add $32, %1 \n\t"
135  "add $16, %2 \n\t"
136  "cmp %3, %0 \n\t"
137  " jb 1b \n\t"
138  : "+r" (block), "+r" (sum), "+r" (offset)
139  : "r"(block+64)
140  );
141 }
142 
143 static void denoise_dct_sse2(MpegEncContext *s, int16_t *block){
144  const int intra= s->mb_intra;
145  int *sum= s->dct_error_sum[intra];
146  uint16_t *offset= s->dct_offset[intra];
147 
148  s->dct_count[intra]++;
149 
150  __asm__ volatile(
151  "pxor %%xmm7, %%xmm7 \n\t"
152  "1: \n\t"
153  "pxor %%xmm0, %%xmm0 \n\t"
154  "pxor %%xmm1, %%xmm1 \n\t"
155  "movdqa (%0), %%xmm2 \n\t"
156  "movdqa 16(%0), %%xmm3 \n\t"
157  "pcmpgtw %%xmm2, %%xmm0 \n\t"
158  "pcmpgtw %%xmm3, %%xmm1 \n\t"
159  "pxor %%xmm0, %%xmm2 \n\t"
160  "pxor %%xmm1, %%xmm3 \n\t"
161  "psubw %%xmm0, %%xmm2 \n\t"
162  "psubw %%xmm1, %%xmm3 \n\t"
163  "movdqa %%xmm2, %%xmm4 \n\t"
164  "movdqa %%xmm3, %%xmm5 \n\t"
165  "psubusw (%2), %%xmm2 \n\t"
166  "psubusw 16(%2), %%xmm3 \n\t"
167  "pxor %%xmm0, %%xmm2 \n\t"
168  "pxor %%xmm1, %%xmm3 \n\t"
169  "psubw %%xmm0, %%xmm2 \n\t"
170  "psubw %%xmm1, %%xmm3 \n\t"
171  "movdqa %%xmm2, (%0) \n\t"
172  "movdqa %%xmm3, 16(%0) \n\t"
173  "movdqa %%xmm4, %%xmm6 \n\t"
174  "movdqa %%xmm5, %%xmm0 \n\t"
175  "punpcklwd %%xmm7, %%xmm4 \n\t"
176  "punpckhwd %%xmm7, %%xmm6 \n\t"
177  "punpcklwd %%xmm7, %%xmm5 \n\t"
178  "punpckhwd %%xmm7, %%xmm0 \n\t"
179  "paddd (%1), %%xmm4 \n\t"
180  "paddd 16(%1), %%xmm6 \n\t"
181  "paddd 32(%1), %%xmm5 \n\t"
182  "paddd 48(%1), %%xmm0 \n\t"
183  "movdqa %%xmm4, (%1) \n\t"
184  "movdqa %%xmm6, 16(%1) \n\t"
185  "movdqa %%xmm5, 32(%1) \n\t"
186  "movdqa %%xmm0, 48(%1) \n\t"
187  "add $32, %0 \n\t"
188  "add $64, %1 \n\t"
189  "add $32, %2 \n\t"
190  "cmp %3, %0 \n\t"
191  " jb 1b \n\t"
192  : "+r" (block), "+r" (sum), "+r" (offset)
193  : "r"(block+64)
194  XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
195  "%xmm4", "%xmm5", "%xmm6", "%xmm7")
196  );
197 }
198 #endif /* HAVE_INLINE_ASM */
199 
200 av_cold void ff_dct_encode_init_x86(MpegEncContext *s)
201 {
202  const int dct_algo = s->avctx->dct_algo;
203  int i;
204 
205  for (i = 0; i < 64; i++)
206  inv_zigzag_direct16[ff_zigzag_direct[i]] = i + 1;
207 
208  if (dct_algo == FF_DCT_AUTO || dct_algo == FF_DCT_MMX) {
209 #if HAVE_MMX_INLINE
210  int cpu_flags = av_get_cpu_flags();
211  if (INLINE_MMX(cpu_flags)) {
212 #if HAVE_6REGS
213  s->dct_quantize = dct_quantize_mmx;
214 #endif
215  s->denoise_dct = denoise_dct_mmx;
216  }
217 #endif
218 #if HAVE_6REGS && HAVE_MMXEXT_INLINE
219  if (INLINE_MMXEXT(cpu_flags))
220  s->dct_quantize = dct_quantize_mmxext;
221 #endif
222 #if HAVE_SSE2_INLINE
223  if (INLINE_SSE2(cpu_flags)) {
224 #if HAVE_6REGS
225  s->dct_quantize = dct_quantize_sse2;
226 #endif
227  s->denoise_dct = denoise_dct_sse2;
228  }
229 #endif
230 #if HAVE_6REGS && HAVE_SSSE3_INLINE
231  if (INLINE_SSSE3(cpu_flags))
232  s->dct_quantize = dct_quantize_ssse3;
233 #endif
234  }
235 }
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