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ffmpeg / libswscale / x86 / yuv2rgb_template.c @ 03a91c74

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/*
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 * software YUV to RGB converter
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 *
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 * Copyright (C) 2001-2007 Michael Niedermayer
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 *           (c) 2010 Konstantin Shishkov
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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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#undef MOVNTQ
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#undef EMMS
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#undef SFENCE
27

    
28
#if HAVE_AMD3DNOW
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/* On K6 femms is faster than emms. On K7 femms is directly mapped to emms. */
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#define EMMS   "femms"
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#else
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#define EMMS   "emms"
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#endif
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#if HAVE_MMX2
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#define MOVNTQ "movntq"
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#define SFENCE "sfence"
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#else
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#define MOVNTQ "movq"
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#define SFENCE " # nop"
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#endif
42

    
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#define REG_BLUE  "0"
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#define REG_RED   "1"
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#define REG_GREEN "2"
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#define REG_ALPHA "3"
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#define YUV2RGB_LOOP(depth)                                          \
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    h_size = (c->dstW + 7) & ~7;                                     \
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    if (h_size * depth > FFABS(dstStride[0]))                        \
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        h_size -= 8;                                                 \
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                                                                     \
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    if (c->srcFormat == PIX_FMT_YUV422P) {                           \
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        srcStride[1] *= 2;                                           \
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        srcStride[2] *= 2;                                           \
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    }                                                                \
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                                                                     \
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    __asm__ volatile ("pxor %mm4, %mm4\n\t");                        \
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    for (y = 0; y < srcSliceH; y++) {                                \
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        uint8_t *image    = dst[0] + (y + srcSliceY) * dstStride[0]; \
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        const uint8_t *py = src[0] +               y * srcStride[0]; \
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        const uint8_t *pu = src[1] +        (y >> 1) * srcStride[1]; \
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        const uint8_t *pv = src[2] +        (y >> 1) * srcStride[2]; \
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        x86_reg index = -h_size / 2;                                 \
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#define YUV2RGB_INITIAL_LOAD          \
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    __asm__ volatile (                \
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        "movq (%5, %0, 2), %%mm6\n\t" \
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        "movd    (%2, %0), %%mm0\n\t" \
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        "movd    (%3, %0), %%mm1\n\t" \
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        "1: \n\t"                     \
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/* YUV2RGB core
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 * Conversion is performed in usual way:
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 * R = Y' * Ycoef + Vred * V'
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 * G = Y' * Ycoef + Vgreen * V' + Ugreen * U'
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 * B = Y' * Ycoef               + Ublue * U'
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 *
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 * where X' = X * 8 - Xoffset (multiplication is performed to increase
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 * precision a bit).
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 * Since it operates in YUV420 colorspace, Y component is additionally
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 * split into Y1 and Y2 for even and odd pixels.
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 *
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 * Input:
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 * mm0 - U (4 elems), mm1 - V (4 elems), mm6 - Y (8 elems), mm4 - zero register
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 * Output:
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 * mm1 - R, mm2 - G, mm0 - B
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 */
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#define YUV2RGB                                  \
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    /* convert Y, U, V into Y1', Y2', U', V' */  \
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    "movq      %%mm6, %%mm7\n\t"                 \
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    "punpcklbw %%mm4, %%mm0\n\t"                 \
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    "punpcklbw %%mm4, %%mm1\n\t"                 \
94
    "pand     "MANGLE(mmx_00ffw)", %%mm6\n\t"    \
95
    "psrlw     $8,    %%mm7\n\t"                 \
96
    "psllw     $3,    %%mm0\n\t"                 \
97
    "psllw     $3,    %%mm1\n\t"                 \
98
    "psllw     $3,    %%mm6\n\t"                 \
99
    "psllw     $3,    %%mm7\n\t"                 \
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    "psubsw   "U_OFFSET"(%4), %%mm0\n\t"         \
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    "psubsw   "V_OFFSET"(%4), %%mm1\n\t"         \
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    "psubw    "Y_OFFSET"(%4), %%mm6\n\t"         \
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    "psubw    "Y_OFFSET"(%4), %%mm7\n\t"         \
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\
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     /* multiply by coefficients */              \
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    "movq      %%mm0, %%mm2\n\t"                 \
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    "movq      %%mm1, %%mm3\n\t"                 \
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    "pmulhw   "UG_COEFF"(%4), %%mm2\n\t"         \
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    "pmulhw   "VG_COEFF"(%4), %%mm3\n\t"         \
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    "pmulhw   "Y_COEFF" (%4), %%mm6\n\t"         \
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    "pmulhw   "Y_COEFF" (%4), %%mm7\n\t"         \
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    "pmulhw   "UB_COEFF"(%4), %%mm0\n\t"         \
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    "pmulhw   "VR_COEFF"(%4), %%mm1\n\t"         \
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    "paddsw    %%mm3, %%mm2\n\t"                 \
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    /* now: mm0 = UB, mm1 = VR, mm2 = CG */      \
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    /*      mm6 = Y1, mm7 = Y2 */                \
117
\
118
    /* produce RGB */                            \
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    "movq      %%mm7, %%mm3\n\t"                 \
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    "movq      %%mm7, %%mm5\n\t"                 \
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    "paddsw    %%mm0, %%mm3\n\t"                 \
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    "paddsw    %%mm1, %%mm5\n\t"                 \
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    "paddsw    %%mm2, %%mm7\n\t"                 \
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    "paddsw    %%mm6, %%mm0\n\t"                 \
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    "paddsw    %%mm6, %%mm1\n\t"                 \
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    "paddsw    %%mm6, %%mm2\n\t"                 \
127

    
128
#define RGB_PACK_INTERLEAVE                  \
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    /* pack and interleave even/odd pixels */    \
130
    "packuswb  %%mm1, %%mm0\n\t"                 \
131
    "packuswb  %%mm5, %%mm3\n\t"                 \
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    "packuswb  %%mm2, %%mm2\n\t"                 \
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    "movq      %%mm0, %%mm1\n\n"                 \
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    "packuswb  %%mm7, %%mm7\n\t"                 \
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    "punpcklbw %%mm3, %%mm0\n\t"                 \
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    "punpckhbw %%mm3, %%mm1\n\t"                 \
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    "punpcklbw %%mm7, %%mm2\n\t"                 \
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139
#define YUV2RGB_ENDLOOP(depth)                   \
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    "movq 8 (%5, %0, 2), %%mm6\n\t"              \
141
    "movd 4 (%3, %0),    %%mm1\n\t"              \
142
    "movd 4 (%2, %0),    %%mm0\n\t"              \
143
    "add $"AV_STRINGIFY(depth * 8)", %1\n\t"     \
144
    "add  $4, %0\n\t"                            \
145
    "js   1b\n\t"                                \
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147
#define YUV2RGB_OPERANDS                                          \
148
        : "+r" (index), "+r" (image)                              \
149
        : "r" (pu - index), "r" (pv - index), "r"(&c->redDither), \
150
          "r" (py - 2*index)                                      \
151
        );                                                        \
152
    }                                                             \
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154
#define YUV2RGB_OPERANDS_ALPHA                                    \
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        : "+r" (index), "+r" (image)                              \
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        : "r" (pu - index), "r" (pv - index), "r"(&c->redDither), \
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          "r" (py - 2*index), "r" (pa - 2*index)                  \
158
        );                                                        \
159
    }                                                             \
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#define YUV2RGB_ENDFUNC                          \
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    __asm__ volatile (SFENCE"\n\t"EMMS);         \
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    return srcSliceH;                            \
164

    
165
#define IF0(x)
166
#define IF1(x) x
167

    
168
#define RGB_PACK16(gmask, is15)                  \
169
    "pand      "MANGLE(mmx_redmask)", %%mm0\n\t" \
170
    "pand      "MANGLE(mmx_redmask)", %%mm1\n\t" \
171
    "movq      %%mm2,     %%mm3\n\t"             \
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    "psllw   $"AV_STRINGIFY(3-is15)", %%mm2\n\t" \
173
    "psrlw   $"AV_STRINGIFY(5+is15)", %%mm3\n\t" \
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    "psrlw     $3,        %%mm0\n\t"             \
175
    IF##is15("psrlw  $1,  %%mm1\n\t")            \
176
    "pand "MANGLE(pb_e0)", %%mm2\n\t"            \
177
    "pand "MANGLE(gmask)", %%mm3\n\t"            \
178
    "por       %%mm2,     %%mm0\n\t"             \
179
    "por       %%mm3,     %%mm1\n\t"             \
180
    "movq      %%mm0,     %%mm2\n\t"             \
181
    "punpcklbw %%mm1,     %%mm0\n\t"             \
182
    "punpckhbw %%mm1,     %%mm2\n\t"             \
183
    MOVNTQ "   %%mm0,      (%1)\n\t"             \
184
    MOVNTQ "   %%mm2,     8(%1)\n\t"             \
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186
#define DITHER_RGB                               \
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    "paddusb "BLUE_DITHER"(%4),  %%mm0\n\t"      \
188
    "paddusb "GREEN_DITHER"(%4), %%mm2\n\t"      \
189
    "paddusb "RED_DITHER"(%4),   %%mm1\n\t"      \
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191
static inline int RENAME(yuv420_rgb15)(SwsContext *c, const uint8_t *src[],
192
                                       int srcStride[],
193
                                       int srcSliceY, int srcSliceH,
194
                                       uint8_t *dst[], int dstStride[])
195
{
196
    int y, h_size;
197

    
198
    YUV2RGB_LOOP(2)
199

    
200
#ifdef DITHER1XBPP
201
        c->blueDither  = ff_dither8[y       & 1];
202
        c->greenDither = ff_dither8[y       & 1];
203
        c->redDither   = ff_dither8[(y + 1) & 1];
204
#endif
205

    
206
        YUV2RGB_INITIAL_LOAD
207
        YUV2RGB
208
        RGB_PACK_INTERLEAVE
209
#ifdef DITHER1XBPP
210
        DITHER_RGB
211
#endif
212
        RGB_PACK16(pb_03, 1)
213

    
214
    YUV2RGB_ENDLOOP(2)
215
    YUV2RGB_OPERANDS
216
    YUV2RGB_ENDFUNC
217
}
218

    
219
static inline int RENAME(yuv420_rgb16)(SwsContext *c, const uint8_t *src[],
220
                                       int srcStride[],
221
                                       int srcSliceY, int srcSliceH,
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                                       uint8_t *dst[], int dstStride[])
223
{
224
    int y, h_size;
225

    
226
    YUV2RGB_LOOP(2)
227

    
228
#ifdef DITHER1XBPP
229
        c->blueDither  = ff_dither8[y       & 1];
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        c->greenDither = ff_dither4[y       & 1];
231
        c->redDither   = ff_dither8[(y + 1) & 1];
232
#endif
233

    
234
        YUV2RGB_INITIAL_LOAD
235
        YUV2RGB
236
        RGB_PACK_INTERLEAVE
237
#ifdef DITHER1XBPP
238
        DITHER_RGB
239
#endif
240
        RGB_PACK16(pb_07, 0)
241

    
242
    YUV2RGB_ENDLOOP(2)
243
    YUV2RGB_OPERANDS
244
    YUV2RGB_ENDFUNC
245
}
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247
#define RGB_PACK24(blue, red)\
248
    "packuswb  %%mm3,      %%mm0 \n" /* R0 R2 R4 R6 R1 R3 R5 R7 */\
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    "packuswb  %%mm5,      %%mm1 \n" /* B0 B2 B4 B6 B1 B3 B5 B7 */\
250
    "packuswb  %%mm7,      %%mm2 \n" /* G0 G2 G4 G6 G1 G3 G5 G7 */\
251
    "movq      %%mm"red",  %%mm3 \n"\
252
    "movq      %%mm"blue", %%mm6 \n"\
253
    "psrlq     $32,        %%mm"red" \n" /* R1 R3 R5 R7 */\
254
    "punpcklbw %%mm2,      %%mm3 \n" /* R0 G0 R2 G2 R4 G4 R6 G6 */\
255
    "punpcklbw %%mm"red",  %%mm6 \n" /* B0 R1 B2 R3 B4 R5 B6 R7 */\
256
    "movq      %%mm3,      %%mm5 \n"\
257
    "punpckhbw %%mm"blue", %%mm2 \n" /* G1 B1 G3 B3 G5 B5 G7 B7 */\
258
    "punpcklwd %%mm6,      %%mm3 \n" /* R0 G0 B0 R1 R2 G2 B2 R3 */\
259
    "punpckhwd %%mm6,      %%mm5 \n" /* R4 G4 B4 R5 R6 G6 B6 R7 */\
260
    RGB_PACK24_B
261

    
262
#if HAVE_MMX2
263
DECLARE_ASM_CONST(8, int16_t, mask1101[4]) = {-1,-1, 0,-1};
264
DECLARE_ASM_CONST(8, int16_t, mask0010[4]) = { 0, 0,-1, 0};
265
DECLARE_ASM_CONST(8, int16_t, mask0110[4]) = { 0,-1,-1, 0};
266
DECLARE_ASM_CONST(8, int16_t, mask1001[4]) = {-1, 0, 0,-1};
267
DECLARE_ASM_CONST(8, int16_t, mask0100[4]) = { 0,-1, 0, 0};
268
#undef RGB_PACK24_B
269
#define RGB_PACK24_B\
270
    "pshufw    $0xc6,  %%mm2, %%mm1 \n"\
271
    "pshufw    $0x84,  %%mm3, %%mm6 \n"\
272
    "pshufw    $0x38,  %%mm5, %%mm7 \n"\
273
    "pand "MANGLE(mask1101)", %%mm6 \n" /* R0 G0 B0 R1 -- -- R2 G2 */\
274
    "movq      %%mm1,         %%mm0 \n"\
275
    "pand "MANGLE(mask0110)", %%mm7 \n" /* -- -- R6 G6 B6 R7 -- -- */\
276
    "movq      %%mm1,         %%mm2 \n"\
277
    "pand "MANGLE(mask0100)", %%mm1 \n" /* -- -- G3 B3 -- -- -- -- */\
278
    "psrlq       $48,         %%mm3 \n" /* B2 R3 -- -- -- -- -- -- */\
279
    "pand "MANGLE(mask0010)", %%mm0 \n" /* -- -- -- -- G1 B1 -- -- */\
280
    "psllq       $32,         %%mm5 \n" /* -- -- -- -- R4 G4 B4 R5 */\
281
    "pand "MANGLE(mask1001)", %%mm2 \n" /* G5 B5 -- -- -- -- G7 B7 */\
282
    "por       %%mm3,         %%mm1 \n"\
283
    "por       %%mm6,         %%mm0 \n"\
284
    "por       %%mm5,         %%mm1 \n"\
285
    "por       %%mm7,         %%mm2 \n"\
286
    MOVNTQ"    %%mm0,          (%1) \n"\
287
    MOVNTQ"    %%mm1,         8(%1) \n"\
288
    MOVNTQ"    %%mm2,        16(%1) \n"\
289

    
290
#else
291
#undef RGB_PACK24_B
292
#define RGB_PACK24_B\
293
    "movd      %%mm3,       (%1) \n" /* R0 G0 B0 R1 */\
294
    "movd      %%mm2,      4(%1) \n" /* G1 B1 */\
295
    "psrlq     $32,        %%mm3 \n"\
296
    "psrlq     $16,        %%mm2 \n"\
297
    "movd      %%mm3,      6(%1) \n" /* R2 G2 B2 R3 */\
298
    "movd      %%mm2,     10(%1) \n" /* G3 B3 */\
299
    "psrlq     $16,        %%mm2 \n"\
300
    "movd      %%mm5,     12(%1) \n" /* R4 G4 B4 R5 */\
301
    "movd      %%mm2,     16(%1) \n" /* G5 B5 */\
302
    "psrlq     $32,        %%mm5 \n"\
303
    "movd      %%mm2,     20(%1) \n" /* -- -- G7 B7 */\
304
    "movd      %%mm5,     18(%1) \n" /* R6 G6 B6 R7 */\
305

    
306
#endif
307

    
308
static inline int RENAME(yuv420_rgb24)(SwsContext *c, const uint8_t *src[],
309
                                       int srcStride[],
310
                                       int srcSliceY, int srcSliceH,
311
                                       uint8_t *dst[], int dstStride[])
312
{
313
    int y, h_size;
314

    
315
    YUV2RGB_LOOP(3)
316

    
317
        YUV2RGB_INITIAL_LOAD
318
        YUV2RGB
319
        RGB_PACK24(REG_BLUE, REG_RED)
320

    
321
    YUV2RGB_ENDLOOP(3)
322
    YUV2RGB_OPERANDS
323
    YUV2RGB_ENDFUNC
324
}
325

    
326
static inline int RENAME(yuv420_bgr24)(SwsContext *c, const uint8_t *src[],
327
                                       int srcStride[],
328
                                       int srcSliceY, int srcSliceH,
329
                                       uint8_t *dst[], int dstStride[])
330
{
331
    int y, h_size;
332

    
333
    YUV2RGB_LOOP(3)
334

    
335
        YUV2RGB_INITIAL_LOAD
336
        YUV2RGB
337
        RGB_PACK24(REG_RED, REG_BLUE)
338

    
339
    YUV2RGB_ENDLOOP(3)
340
    YUV2RGB_OPERANDS
341
    YUV2RGB_ENDFUNC
342
}
343

    
344

    
345
#define SET_EMPTY_ALPHA                                                      \
346
    "pcmpeqd   %%mm"REG_ALPHA", %%mm"REG_ALPHA"\n\t" /* set alpha to 0xFF */ \
347

    
348
#define LOAD_ALPHA                                   \
349
    "movq      (%6, %0, 2),     %%mm"REG_ALPHA"\n\t" \
350

    
351
#define RGB_PACK32(red, green, blue, alpha)  \
352
    "movq      %%mm"blue",  %%mm5\n\t"       \
353
    "movq      %%mm"red",   %%mm6\n\t"       \
354
    "punpckhbw %%mm"green", %%mm5\n\t"       \
355
    "punpcklbw %%mm"green", %%mm"blue"\n\t"  \
356
    "punpckhbw %%mm"alpha", %%mm6\n\t"       \
357
    "punpcklbw %%mm"alpha", %%mm"red"\n\t"   \
358
    "movq      %%mm"blue",  %%mm"green"\n\t" \
359
    "movq      %%mm5,       %%mm"alpha"\n\t" \
360
    "punpcklwd %%mm"red",   %%mm"blue"\n\t"  \
361
    "punpckhwd %%mm"red",   %%mm"green"\n\t" \
362
    "punpcklwd %%mm6,       %%mm5\n\t"       \
363
    "punpckhwd %%mm6,       %%mm"alpha"\n\t" \
364
    MOVNTQ "   %%mm"blue",   0(%1)\n\t"      \
365
    MOVNTQ "   %%mm"green",  8(%1)\n\t"      \
366
    MOVNTQ "   %%mm5,       16(%1)\n\t"      \
367
    MOVNTQ "   %%mm"alpha", 24(%1)\n\t"      \
368

    
369
static inline int RENAME(yuv420_rgb32)(SwsContext *c, const uint8_t *src[],
370
                                       int srcStride[],
371
                                       int srcSliceY, int srcSliceH,
372
                                       uint8_t *dst[], int dstStride[])
373
{
374
    int y, h_size;
375

    
376
    YUV2RGB_LOOP(4)
377

    
378
        YUV2RGB_INITIAL_LOAD
379
        YUV2RGB
380
        RGB_PACK_INTERLEAVE
381
        SET_EMPTY_ALPHA
382
        RGB_PACK32(REG_RED, REG_GREEN, REG_BLUE, REG_ALPHA)
383

    
384
    YUV2RGB_ENDLOOP(4)
385
    YUV2RGB_OPERANDS
386
    YUV2RGB_ENDFUNC
387
}
388

    
389
static inline int RENAME(yuva420_rgb32)(SwsContext *c, const uint8_t *src[],
390
                                        int srcStride[],
391
                                        int srcSliceY, int srcSliceH,
392
                                        uint8_t *dst[], int dstStride[])
393
{
394
#if HAVE_7REGS
395
    int y, h_size;
396

    
397
    YUV2RGB_LOOP(4)
398

    
399
        const uint8_t *pa = src[3] + y * srcStride[3];
400
        YUV2RGB_INITIAL_LOAD
401
        YUV2RGB
402
        RGB_PACK_INTERLEAVE
403
        LOAD_ALPHA
404
        RGB_PACK32(REG_RED, REG_GREEN, REG_BLUE, REG_ALPHA)
405

    
406
    YUV2RGB_ENDLOOP(4)
407
    YUV2RGB_OPERANDS_ALPHA
408
    YUV2RGB_ENDFUNC
409
#endif
410
    return 0;
411
}
412

    
413
static inline int RENAME(yuv420_bgr32)(SwsContext *c, const uint8_t *src[],
414
                                       int srcStride[],
415
                                       int srcSliceY, int srcSliceH,
416
                                       uint8_t *dst[], int dstStride[])
417
{
418
    int y, h_size;
419

    
420
    YUV2RGB_LOOP(4)
421

    
422
        YUV2RGB_INITIAL_LOAD
423
        YUV2RGB
424
        RGB_PACK_INTERLEAVE
425
        SET_EMPTY_ALPHA
426
        RGB_PACK32(REG_BLUE, REG_GREEN, REG_RED, REG_ALPHA)
427

    
428
    YUV2RGB_ENDLOOP(4)
429
    YUV2RGB_OPERANDS
430
    YUV2RGB_ENDFUNC
431
}
432

    
433
static inline int RENAME(yuva420_bgr32)(SwsContext *c, const uint8_t *src[],
434
                                        int srcStride[],
435
                                        int srcSliceY, int srcSliceH,
436
                                        uint8_t *dst[], int dstStride[])
437
{
438
#if HAVE_7REGS
439
    int y, h_size;
440

    
441
    YUV2RGB_LOOP(4)
442

    
443
        const uint8_t *pa = src[3] + y * srcStride[3];
444
        YUV2RGB_INITIAL_LOAD
445
        YUV2RGB
446
        RGB_PACK_INTERLEAVE
447
        LOAD_ALPHA
448
        RGB_PACK32(REG_BLUE, REG_GREEN, REG_RED, REG_ALPHA)
449

    
450
    YUV2RGB_ENDLOOP(4)
451
    YUV2RGB_OPERANDS_ALPHA
452
    YUV2RGB_ENDFUNC
453
#endif
454
    return 0;
455
}