ed9c66f584
Instead of using the predict buffer, the decoder now writes
the predictor into the recon buffer. For blocks with eob=0,
unnecessary idcts can be eliminated. This gave a performance
boost of ~1.8% for the HD clips used.
Tero: Added needed changes to ARM side and scheduled some
assembly code to prevent interlocks.
Patch Set 6: Merged (I1bcdca7a95aacc3a181b9faa6b10e3a71ee24df3)
into this commit because of similarities in the idct
functions.
Patch Set 7: EC bug fix.
Change-Id: Ie31d90b5d3522e1108163f2ac491e455e3f955e6
71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/*
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* Copyright (c) 2010 The WebM 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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#include "invtrans.h"
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void vp8_inverse_transform_b(const vp8_idct_rtcd_vtable_t *rtcd, BLOCKD *b,
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int pitch)
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{
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if (b->eob > 1)
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{
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IDCT_INVOKE(rtcd, idct16)(b->dqcoeff, b->predictor, pitch,
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*(b->base_dst) + b->dst, b->dst_stride);
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}
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else
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{
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IDCT_INVOKE(rtcd, idct1_scalar_add)(b->dqcoeff[0], b->predictor, pitch,
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*(b->base_dst) + b->dst, b->dst_stride);
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}
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}
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static void recon_dcblock(MACROBLOCKD *x)
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{
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BLOCKD *b = &x->block[24];
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int i;
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for (i = 0; i < 16; i++)
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{
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x->block[i].dqcoeff[0] = b->diff[i];
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}
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}
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void vp8_inverse_transform_mby(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
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{
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int i;
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/* do 2nd order transform on the dc block */
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IDCT_INVOKE(rtcd, iwalsh16)(x->block[24].dqcoeff, x->block[24].diff);
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recon_dcblock(x);
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for (i = 0; i < 16; i++)
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{
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vp8_inverse_transform_b(rtcd, &x->block[i], 16);
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}
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}
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void vp8_inverse_transform_mbuv(const vp8_idct_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
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{
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int i;
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for (i = 16; i < 24; i++)
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{
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vp8_inverse_transform_b(rtcd, &x->block[i], 8);
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}
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}
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