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a786c8259d
The Xvid IDCT is only required to decode some Xvid-encoded MPEG-4 files, so there is no point in having it as an unconditional part of idctdsp.
87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#include "config.h"
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#include "fdct.h"
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#include "idct_xvid.h"
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#include "simple_idct.h"
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static const struct algo fdct_tab_arch[] = {
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#if HAVE_MMX_INLINE
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{ "MMX", ff_fdct_mmx, FF_IDCT_PERM_NONE, AV_CPU_FLAG_MMX },
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#endif
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#if HAVE_MMXEXT_INLINE
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{ "MMXEXT", ff_fdct_mmxext, FF_IDCT_PERM_NONE, AV_CPU_FLAG_MMXEXT },
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#endif
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#if HAVE_SSE2_INLINE
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{ "SSE2", ff_fdct_sse2, FF_IDCT_PERM_NONE, AV_CPU_FLAG_SSE2 },
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#endif
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{ 0 }
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};
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static const struct algo idct_tab_arch[] = {
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#if HAVE_MMX_INLINE
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{ "SIMPLE-MMX", ff_simple_idct_mmx, FF_IDCT_PERM_SIMPLE, AV_CPU_FLAG_MMX },
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#endif
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#if CONFIG_MPEG4_DECODER
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#if HAVE_MMX_INLINE
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{ "XVID-MMX", ff_idct_xvid_mmx, FF_IDCT_PERM_NONE, AV_CPU_FLAG_MMX, 1 },
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#endif
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#if HAVE_MMXEXT_INLINE
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{ "XVID-MMXEXT", ff_idct_xvid_mmxext, FF_IDCT_PERM_NONE, AV_CPU_FLAG_MMXEXT, 1 },
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#endif
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#if HAVE_SSE2_INLINE
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{ "XVID-SSE2", ff_idct_xvid_sse2, FF_IDCT_PERM_SSE2, AV_CPU_FLAG_SSE2, 1 },
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#endif
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#endif /* CONFIG_MPEG4_DECODER */
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{ 0 }
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};
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static short idct_simple_mmx_perm[64] = {
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0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
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0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
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0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
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0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
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0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
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0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
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0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
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0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
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};
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static const uint8_t idct_sse2_row_perm[8] = { 0, 4, 1, 5, 2, 6, 3, 7 };
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static int permute_x86(int16_t dst[64], const int16_t src[64],
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enum idct_permutation_type perm_type)
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{
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int i;
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switch (perm_type) {
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case FF_IDCT_PERM_SIMPLE:
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for (i = 0; i < 64; i++)
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dst[idct_simple_mmx_perm[i]] = src[i];
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return 1;
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case FF_IDCT_PERM_SSE2:
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for (i = 0; i < 64; i++)
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dst[(i & 0x38) | idct_sse2_row_perm[i & 7]] = src[i];
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return 1;
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}
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return 0;
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}
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