d0dd01b8ce
The new fdct lowers the round trip sum squared error for a 4x4 block ~0.12. or ~0.008/pixel. For reference, the old matrix multiply version has average round trip error 1.46 for a 4x4 block. Thanks to "derf" for his suggestions and references. Change-Id: I5559d1e81d333b319404ab16b336b739f87afc79
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef __INC_DCT_H
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#define __INC_DCT_H
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#define prototype_fdct(sym) void (sym)(short *input, short *output, int pitch)
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#if ARCH_X86 || ARCH_X86_64
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#include "x86/dct_x86.h"
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#endif
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#if ARCH_ARM
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#include "arm/dct_arm.h"
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#endif
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#ifndef vp8_fdct_short4x4
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#define vp8_fdct_short4x4 vp8_short_fdct4x4_c
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#endif
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extern prototype_fdct(vp8_fdct_short4x4);
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#ifndef vp8_fdct_short8x4
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#define vp8_fdct_short8x4 vp8_short_fdct8x4_c
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#endif
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extern prototype_fdct(vp8_fdct_short8x4);
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#ifndef vp8_fdct_walsh_short4x4
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#define vp8_fdct_walsh_short4x4 vp8_short_walsh4x4_c
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#endif
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extern prototype_fdct(vp8_fdct_walsh_short4x4);
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typedef prototype_fdct(*vp8_fdct_fn_t);
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typedef struct
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{
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vp8_fdct_fn_t short4x4;
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vp8_fdct_fn_t short8x4;
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vp8_fdct_fn_t fast4x4;
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vp8_fdct_fn_t fast8x4;
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vp8_fdct_fn_t walsh_short4x4;
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} vp8_fdct_rtcd_vtable_t;
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#if CONFIG_RUNTIME_CPU_DETECT
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#define FDCT_INVOKE(ctx,fn) (ctx)->fn
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#else
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#define FDCT_INVOKE(ctx,fn) vp8_fdct_##fn
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#endif
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#endif
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