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 #include "dsputil_x86.h"
30 
31 /* not permutated inverse zigzag_direct + 1 for MMX quantizer */
32 DECLARE_ALIGNED(16, static uint16_t, inv_zigzag_direct16)[64];
33 
34 #if HAVE_MMX_INLINE
35 #define COMPILE_TEMPLATE_MMXEXT 0
36 #define COMPILE_TEMPLATE_SSE2 0
37 #define COMPILE_TEMPLATE_SSSE3 0
38 #define RENAME(a) a ## _MMX
39 #define RENAMEl(a) a ## _mmx
40 #include "mpegvideoenc_template.c"
41 #endif /* HAVE_MMX_INLINE */
42 
43 #if HAVE_MMXEXT_INLINE
44 #undef COMPILE_TEMPLATE_SSSE3
45 #undef COMPILE_TEMPLATE_SSE2
46 #undef COMPILE_TEMPLATE_MMXEXT
47 #define COMPILE_TEMPLATE_MMXEXT 1
48 #define COMPILE_TEMPLATE_SSE2 0
49 #define COMPILE_TEMPLATE_SSSE3 0
50 #undef RENAME
51 #undef RENAMEl
52 #define RENAME(a) a ## _MMXEXT
53 #define RENAMEl(a) a ## _mmxext
54 #include "mpegvideoenc_template.c"
55 #endif /* HAVE_MMXEXT_INLINE */
56 
57 #if HAVE_SSE2_INLINE
58 #undef COMPILE_TEMPLATE_MMXEXT
59 #undef COMPILE_TEMPLATE_SSE2
60 #undef COMPILE_TEMPLATE_SSSE3
61 #define COMPILE_TEMPLATE_MMXEXT 0
62 #define COMPILE_TEMPLATE_SSE2 1
63 #define COMPILE_TEMPLATE_SSSE3 0
64 #undef RENAME
65 #undef RENAMEl
66 #define RENAME(a) a ## _SSE2
67 #define RENAMEl(a) a ## _sse2
68 #include "mpegvideoenc_template.c"
69 #endif /* HAVE_SSE2_INLINE */
70 
71 #if HAVE_SSSE3_INLINE
72 #undef COMPILE_TEMPLATE_MMXEXT
73 #undef COMPILE_TEMPLATE_SSE2
74 #undef COMPILE_TEMPLATE_SSSE3
75 #define COMPILE_TEMPLATE_MMXEXT 0
76 #define COMPILE_TEMPLATE_SSE2 1
77 #define COMPILE_TEMPLATE_SSSE3 1
78 #undef RENAME
79 #undef RENAMEl
80 #define RENAME(a) a ## _SSSE3
81 #define RENAMEl(a) a ## _sse2
82 #include "mpegvideoenc_template.c"
83 #endif /* HAVE_SSSE3_INLINE */
84 
85 #if HAVE_INLINE_ASM
86 static void denoise_dct_mmx(MpegEncContext *s, int16_t *block){
87  const int intra= s->mb_intra;
88  int *sum= s->dct_error_sum[intra];
89  uint16_t *offset= s->dct_offset[intra];
90 
91  s->dct_count[intra]++;
92 
93  __asm__ volatile(
94  "pxor %%mm7, %%mm7 \n\t"
95  "1: \n\t"
96  "pxor %%mm0, %%mm0 \n\t"
97  "pxor %%mm1, %%mm1 \n\t"
98  "movq (%0), %%mm2 \n\t"
99  "movq 8(%0), %%mm3 \n\t"
100  "pcmpgtw %%mm2, %%mm0 \n\t"
101  "pcmpgtw %%mm3, %%mm1 \n\t"
102  "pxor %%mm0, %%mm2 \n\t"
103  "pxor %%mm1, %%mm3 \n\t"
104  "psubw %%mm0, %%mm2 \n\t"
105  "psubw %%mm1, %%mm3 \n\t"
106  "movq %%mm2, %%mm4 \n\t"
107  "movq %%mm3, %%mm5 \n\t"
108  "psubusw (%2), %%mm2 \n\t"
109  "psubusw 8(%2), %%mm3 \n\t"
110  "pxor %%mm0, %%mm2 \n\t"
111  "pxor %%mm1, %%mm3 \n\t"
112  "psubw %%mm0, %%mm2 \n\t"
113  "psubw %%mm1, %%mm3 \n\t"
114  "movq %%mm2, (%0) \n\t"
115  "movq %%mm3, 8(%0) \n\t"
116  "movq %%mm4, %%mm2 \n\t"
117  "movq %%mm5, %%mm3 \n\t"
118  "punpcklwd %%mm7, %%mm4 \n\t"
119  "punpckhwd %%mm7, %%mm2 \n\t"
120  "punpcklwd %%mm7, %%mm5 \n\t"
121  "punpckhwd %%mm7, %%mm3 \n\t"
122  "paddd (%1), %%mm4 \n\t"
123  "paddd 8(%1), %%mm2 \n\t"
124  "paddd 16(%1), %%mm5 \n\t"
125  "paddd 24(%1), %%mm3 \n\t"
126  "movq %%mm4, (%1) \n\t"
127  "movq %%mm2, 8(%1) \n\t"
128  "movq %%mm5, 16(%1) \n\t"
129  "movq %%mm3, 24(%1) \n\t"
130  "add $16, %0 \n\t"
131  "add $32, %1 \n\t"
132  "add $16, %2 \n\t"
133  "cmp %3, %0 \n\t"
134  " jb 1b \n\t"
135  : "+r" (block), "+r" (sum), "+r" (offset)
136  : "r"(block+64)
137  );
138 }
139 
140 static void denoise_dct_sse2(MpegEncContext *s, int16_t *block){
141  const int intra= s->mb_intra;
142  int *sum= s->dct_error_sum[intra];
143  uint16_t *offset= s->dct_offset[intra];
144 
145  s->dct_count[intra]++;
146 
147  __asm__ volatile(
148  "pxor %%xmm7, %%xmm7 \n\t"
149  "1: \n\t"
150  "pxor %%xmm0, %%xmm0 \n\t"
151  "pxor %%xmm1, %%xmm1 \n\t"
152  "movdqa (%0), %%xmm2 \n\t"
153  "movdqa 16(%0), %%xmm3 \n\t"
154  "pcmpgtw %%xmm2, %%xmm0 \n\t"
155  "pcmpgtw %%xmm3, %%xmm1 \n\t"
156  "pxor %%xmm0, %%xmm2 \n\t"
157  "pxor %%xmm1, %%xmm3 \n\t"
158  "psubw %%xmm0, %%xmm2 \n\t"
159  "psubw %%xmm1, %%xmm3 \n\t"
160  "movdqa %%xmm2, %%xmm4 \n\t"
161  "movdqa %%xmm3, %%xmm5 \n\t"
162  "psubusw (%2), %%xmm2 \n\t"
163  "psubusw 16(%2), %%xmm3 \n\t"
164  "pxor %%xmm0, %%xmm2 \n\t"
165  "pxor %%xmm1, %%xmm3 \n\t"
166  "psubw %%xmm0, %%xmm2 \n\t"
167  "psubw %%xmm1, %%xmm3 \n\t"
168  "movdqa %%xmm2, (%0) \n\t"
169  "movdqa %%xmm3, 16(%0) \n\t"
170  "movdqa %%xmm4, %%xmm6 \n\t"
171  "movdqa %%xmm5, %%xmm0 \n\t"
172  "punpcklwd %%xmm7, %%xmm4 \n\t"
173  "punpckhwd %%xmm7, %%xmm6 \n\t"
174  "punpcklwd %%xmm7, %%xmm5 \n\t"
175  "punpckhwd %%xmm7, %%xmm0 \n\t"
176  "paddd (%1), %%xmm4 \n\t"
177  "paddd 16(%1), %%xmm6 \n\t"
178  "paddd 32(%1), %%xmm5 \n\t"
179  "paddd 48(%1), %%xmm0 \n\t"
180  "movdqa %%xmm4, (%1) \n\t"
181  "movdqa %%xmm6, 16(%1) \n\t"
182  "movdqa %%xmm5, 32(%1) \n\t"
183  "movdqa %%xmm0, 48(%1) \n\t"
184  "add $32, %0 \n\t"
185  "add $64, %1 \n\t"
186  "add $32, %2 \n\t"
187  "cmp %3, %0 \n\t"
188  " jb 1b \n\t"
189  : "+r" (block), "+r" (sum), "+r" (offset)
190  : "r"(block+64)
191  XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
192  "%xmm4", "%xmm5", "%xmm6", "%xmm7")
193  );
194 }
195 #endif /* HAVE_INLINE_ASM */
196 
197 av_cold void ff_dct_encode_init_x86(MpegEncContext *s)
198 {
199  const int dct_algo = s->avctx->dct_algo;
200  int i;
201 
202  for (i = 0; i < 64; i++)
203  inv_zigzag_direct16[ff_zigzag_direct[i]] = i + 1;
204 
205  if (dct_algo == FF_DCT_AUTO || dct_algo == FF_DCT_MMX) {
206 #if HAVE_MMX_INLINE
207  int cpu_flags = av_get_cpu_flags();
208  if (INLINE_MMX(cpu_flags)) {
209  s->dct_quantize = dct_quantize_MMX;
210  s->denoise_dct = denoise_dct_mmx;
211  }
212 #endif
213 #if HAVE_MMXEXT_INLINE
214  if (INLINE_MMXEXT(cpu_flags))
215  s->dct_quantize = dct_quantize_MMXEXT;
216 #endif
217 #if HAVE_SSE2_INLINE
218  if (INLINE_SSE2(cpu_flags)) {
219  s->dct_quantize = dct_quantize_SSE2;
220  s->denoise_dct = denoise_dct_sse2;
221  }
222 #endif
223 #if HAVE_SSSE3_INLINE
224  if (INLINE_SSSE3(cpu_flags))
225  s->dct_quantize = dct_quantize_SSSE3;
226 #endif
227  }
228 }
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