FFmpeg
mpegvideoencdsp_init.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/attributes.h"
20 #include "libavutil/avassert.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/x86/cpu.h"
23 #include "libavcodec/avcodec.h"
25 
26 int ff_pix_sum16_sse2(const uint8_t *pix, int line_size);
27 int ff_pix_sum16_xop(const uint8_t *pix, int line_size);
28 int ff_pix_norm1_sse2(const uint8_t *pix, int line_size);
29 
30 #if HAVE_INLINE_ASM
31 
32 #define PHADDD(a, t) \
33  "movq " #a ", " #t " \n\t" \
34  "psrlq $32, " #a " \n\t" \
35  "paddd " #t ", " #a " \n\t"
36 
37 /*
38  * pmulhw: dst[0 - 15] = (src[0 - 15] * dst[0 - 15])[16 - 31]
39  * pmulhrw: dst[0 - 15] = (src[0 - 15] * dst[0 - 15] + 0x8000)[16 - 31]
40  * pmulhrsw: dst[0 - 15] = (src[0 - 15] * dst[0 - 15] + 0x4000)[15 - 30]
41  */
42 #define PMULHRW(x, y, s, o) \
43  "pmulhw " #s ", " #x " \n\t" \
44  "pmulhw " #s ", " #y " \n\t" \
45  "paddw " #o ", " #x " \n\t" \
46  "paddw " #o ", " #y " \n\t" \
47  "psraw $1, " #x " \n\t" \
48  "psraw $1, " #y " \n\t"
49 #define DEF(x) x ## _mmx
50 #define SET_RND MOVQ_WONE
51 #define SCALE_OFFSET 1
52 
54 
55 #undef DEF
56 #undef SET_RND
57 #undef SCALE_OFFSET
58 #undef PMULHRW
59 
60 #define DEF(x) x ## _3dnow
61 #define SET_RND(x)
62 #define SCALE_OFFSET 0
63 #define PMULHRW(x, y, s, o) \
64  "pmulhrw " #s ", " #x " \n\t" \
65  "pmulhrw " #s ", " #y " \n\t"
66 
68 
69 #undef DEF
70 #undef SET_RND
71 #undef SCALE_OFFSET
72 #undef PMULHRW
73 
74 #if HAVE_SSSE3_INLINE
75 #undef PHADDD
76 #define DEF(x) x ## _ssse3
77 #define SET_RND(x)
78 #define SCALE_OFFSET -1
79 
80 #define PHADDD(a, t) \
81  "pshufw $0x0E, " #a ", " #t " \n\t" \
82  /* faster than phaddd on core2 */ \
83  "paddd " #t ", " #a " \n\t"
84 
85 #define PMULHRW(x, y, s, o) \
86  "pmulhrsw " #s ", " #x " \n\t" \
87  "pmulhrsw " #s ", " #y " \n\t"
88 
90 
91 #undef DEF
92 #undef SET_RND
93 #undef SCALE_OFFSET
94 #undef PMULHRW
95 #undef PHADDD
96 #endif /* HAVE_SSSE3_INLINE */
97 
98 /* Draw the edges of width 'w' of an image of size width, height
99  * this MMX version can only handle w == 8 || w == 16. */
100 static void draw_edges_mmx(uint8_t *buf, int wrap, int width, int height,
101  int w, int h, int sides)
102 {
103  uint8_t *ptr, *last_line;
104  int i;
105 
106  last_line = buf + (height - 1) * wrap;
107  /* left and right */
108  ptr = buf;
109  if (w == 8) {
110  __asm__ volatile (
111  "1: \n\t"
112  "movd (%0), %%mm0 \n\t"
113  "punpcklbw %%mm0, %%mm0 \n\t"
114  "punpcklwd %%mm0, %%mm0 \n\t"
115  "punpckldq %%mm0, %%mm0 \n\t"
116  "movq %%mm0, -8(%0) \n\t"
117  "movq -8(%0, %2), %%mm1 \n\t"
118  "punpckhbw %%mm1, %%mm1 \n\t"
119  "punpckhwd %%mm1, %%mm1 \n\t"
120  "punpckhdq %%mm1, %%mm1 \n\t"
121  "movq %%mm1, (%0, %2) \n\t"
122  "add %1, %0 \n\t"
123  "cmp %3, %0 \n\t"
124  "jb 1b \n\t"
125  : "+r" (ptr)
126  : "r" ((x86_reg) wrap), "r" ((x86_reg) width),
127  "r" (ptr + wrap * height));
128  } else if (w == 16) {
129  __asm__ volatile (
130  "1: \n\t"
131  "movd (%0), %%mm0 \n\t"
132  "punpcklbw %%mm0, %%mm0 \n\t"
133  "punpcklwd %%mm0, %%mm0 \n\t"
134  "punpckldq %%mm0, %%mm0 \n\t"
135  "movq %%mm0, -8(%0) \n\t"
136  "movq %%mm0, -16(%0) \n\t"
137  "movq -8(%0, %2), %%mm1 \n\t"
138  "punpckhbw %%mm1, %%mm1 \n\t"
139  "punpckhwd %%mm1, %%mm1 \n\t"
140  "punpckhdq %%mm1, %%mm1 \n\t"
141  "movq %%mm1, (%0, %2) \n\t"
142  "movq %%mm1, 8(%0, %2) \n\t"
143  "add %1, %0 \n\t"
144  "cmp %3, %0 \n\t"
145  "jb 1b \n\t"
146  : "+r"(ptr)
147  : "r"((x86_reg)wrap), "r"((x86_reg)width), "r"(ptr + wrap * height)
148  );
149  } else {
150  av_assert1(w == 4);
151  __asm__ volatile (
152  "1: \n\t"
153  "movd (%0), %%mm0 \n\t"
154  "punpcklbw %%mm0, %%mm0 \n\t"
155  "punpcklwd %%mm0, %%mm0 \n\t"
156  "movd %%mm0, -4(%0) \n\t"
157  "movd -4(%0, %2), %%mm1 \n\t"
158  "punpcklbw %%mm1, %%mm1 \n\t"
159  "punpckhwd %%mm1, %%mm1 \n\t"
160  "punpckhdq %%mm1, %%mm1 \n\t"
161  "movd %%mm1, (%0, %2) \n\t"
162  "add %1, %0 \n\t"
163  "cmp %3, %0 \n\t"
164  "jb 1b \n\t"
165  : "+r" (ptr)
166  : "r" ((x86_reg) wrap), "r" ((x86_reg) width),
167  "r" (ptr + wrap * height));
168  }
169 
170  /* top and bottom (and hopefully also the corners) */
171  if (sides & EDGE_TOP) {
172  for (i = 0; i < h; i += 4) {
173  ptr = buf - (i + 1) * wrap - w;
174  __asm__ volatile (
175  "1: \n\t"
176  "movq (%1, %0), %%mm0 \n\t"
177  "movq %%mm0, (%0) \n\t"
178  "movq %%mm0, (%0, %2) \n\t"
179  "movq %%mm0, (%0, %2, 2) \n\t"
180  "movq %%mm0, (%0, %3) \n\t"
181  "add $8, %0 \n\t"
182  "cmp %4, %0 \n\t"
183  "jb 1b \n\t"
184  : "+r" (ptr)
185  : "r" ((x86_reg) buf - (x86_reg) ptr - w),
186  "r" ((x86_reg) - wrap), "r" ((x86_reg) - wrap * 3),
187  "r" (ptr + width + 2 * w));
188  }
189  }
190 
191  if (sides & EDGE_BOTTOM) {
192  for (i = 0; i < h; i += 4) {
193  ptr = last_line + (i + 1) * wrap - w;
194  __asm__ volatile (
195  "1: \n\t"
196  "movq (%1, %0), %%mm0 \n\t"
197  "movq %%mm0, (%0) \n\t"
198  "movq %%mm0, (%0, %2) \n\t"
199  "movq %%mm0, (%0, %2, 2) \n\t"
200  "movq %%mm0, (%0, %3) \n\t"
201  "add $8, %0 \n\t"
202  "cmp %4, %0 \n\t"
203  "jb 1b \n\t"
204  : "+r" (ptr)
205  : "r" ((x86_reg) last_line - (x86_reg) ptr - w),
206  "r" ((x86_reg) wrap), "r" ((x86_reg) wrap * 3),
207  "r" (ptr + width + 2 * w));
208  }
209  }
210 }
211 
212 #endif /* HAVE_INLINE_ASM */
213 
215  AVCodecContext *avctx)
216 {
217  int cpu_flags = av_get_cpu_flags();
218 
219  if (EXTERNAL_SSE2(cpu_flags)) {
220  c->pix_sum = ff_pix_sum16_sse2;
221  c->pix_norm1 = ff_pix_norm1_sse2;
222  }
223 
224  if (EXTERNAL_XOP(cpu_flags)) {
225  c->pix_sum = ff_pix_sum16_xop;
226  }
227 
228 #if HAVE_INLINE_ASM
229 
230  if (INLINE_MMX(cpu_flags)) {
231  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
232  c->try_8x8basis = try_8x8basis_mmx;
233  }
234  c->add_8x8basis = add_8x8basis_mmx;
235 
236  if (avctx->bits_per_raw_sample <= 8) {
237  c->draw_edges = draw_edges_mmx;
238  }
239  }
240 
241  if (INLINE_AMD3DNOW(cpu_flags)) {
242  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
243  c->try_8x8basis = try_8x8basis_3dnow;
244  }
245  c->add_8x8basis = add_8x8basis_3dnow;
246  }
247 
248 #if HAVE_SSSE3_INLINE
249  if (INLINE_SSSE3(cpu_flags)) {
250  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
251  c->try_8x8basis = try_8x8basis_ssse3;
252  }
253  c->add_8x8basis = add_8x8basis_ssse3;
254  }
255 #endif /* HAVE_SSSE3_INLINE */
256 
257 #endif /* HAVE_INLINE_ASM */
258 }
INLINE_MMX
#define INLINE_MMX(flags)
Definition: cpu.h:87
cpu.h
EDGE_BOTTOM
#define EDGE_BOTTOM
Definition: mpegvideoencdsp.h:30
mpegvideoenc_qns_template.c
w
uint8_t w
Definition: llviddspenc.c:38
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:103
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
wrap
#define wrap(func)
Definition: neontest.h:65
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:478
avassert.h
av_cold
#define av_cold
Definition: attributes.h:90
width
#define width
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1451
EXTERNAL_XOP
#define EXTERNAL_XOP(flags)
Definition: cpu.h:73
ff_pix_sum16_xop
int ff_pix_sum16_xop(const uint8_t *pix, int line_size)
ff_pix_norm1_sse2
int ff_pix_norm1_sse2(const uint8_t *pix, int line_size)
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
cpu.h
height
#define height
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
MpegvideoEncDSPContext
Definition: mpegvideoencdsp.h:32
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
avcodec.h
__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")
ff_mpegvideoencdsp_init_x86
av_cold void ff_mpegvideoencdsp_init_x86(MpegvideoEncDSPContext *c, AVCodecContext *avctx)
Definition: mpegvideoencdsp_init.c:214
INLINE_SSSE3
#define INLINE_SSSE3(flags)
Definition: cpu.h:96
AVCodecContext
main external API structure.
Definition: avcodec.h:398
EDGE_TOP
#define EDGE_TOP
Definition: mpegvideoencdsp.h:29
mpegvideoencdsp.h
ff_pix_sum16_sse2
int ff_pix_sum16_sse2(const uint8_t *pix, int line_size)
AV_CODEC_FLAG_BITEXACT
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:288
x86_reg
int x86_reg
Definition: asm.h:72
h
h
Definition: vp9dsp_template.c:2038
INLINE_AMD3DNOW
#define INLINE_AMD3DNOW(flags)
Definition: cpu.h:85