6a501462f8
Lots of TODO which will be taken care in upcoming changes. As is, about 6x faster than C version. Change-Id: Ie2557b72fd2d8edca376dbf400a4d173aa5e63e0
48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/*
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* Copyright (c) 2013 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 "vp9/common/vp9_common.h"
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// defined in vp9/common/arm/neon/vp9_short_idct32x32_add_neon.asm
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extern void idct32_transpose_and_transform(int16_t *transpose_buffer,
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int16_t *output, int16_t *input);
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extern void idct32_combine_add(uint8_t *dest, int16_t *out, int dest_stride);
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// defined in vp9/common/arm/neon/vp9_short_idct16x16_add_neon.asm
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extern void save_neon_registers();
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extern void restore_neon_registers();
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void vp9_short_idct32x32_add_neon(int16_t *input, uint8_t *dest,
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int dest_stride) {
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// TODO(cd): move the creation of these buffers within the ASM file
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// internal buffer used to transpose 8 lines into before transforming them
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int16_t transpose_buffer[32 * 8];
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// results of the first pass (transpose and transform rows)
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int16_t pass1[32 * 32];
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// results of the second pass (transpose and transform columns)
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int16_t pass2[32 * 32];
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// save register we need to preserve
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save_neon_registers();
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// process rows
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idct32_transpose_and_transform(transpose_buffer, pass1, input);
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// process columns
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// TODO(cd): do these two steps/passes within the ASM file
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idct32_transpose_and_transform(transpose_buffer, pass2, pass1);
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// combine and add to dest
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// TODO(cd): integrate this within the last storage step of the second pass
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idct32_combine_add(dest, pass2, dest_stride);
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// restore register we need to preserve
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restore_neon_registers();
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}
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// TODO(cd): Eliminate this file altogether when everything is in ASM file
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