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/*
* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp9/common/vp9_common.h"
// defined in vp9/common/arm/neon/vp9_short_idct32x32_add_neon.asm
extern void idct32_transpose_and_transform(int16_t *transpose_buffer,
int16_t *output, int16_t *input);
extern void idct32_combine_add(uint8_t *dest, int16_t *out, int dest_stride);
// defined in vp9/common/arm/neon/vp9_short_idct16x16_add_neon.asm
extern void save_neon_registers();
extern void restore_neon_registers();
void vp9_short_idct32x32_add_neon(int16_t *input, uint8_t *dest,
int dest_stride) {
// TODO(cd): move the creation of these buffers within the ASM file
// internal buffer used to transpose 8 lines into before transforming them
int16_t transpose_buffer[32 * 8];
// results of the first pass (transpose and transform rows)
int16_t pass1[32 * 32];
// results of the second pass (transpose and transform columns)
int16_t pass2[32 * 32];
// save register we need to preserve
save_neon_registers();
// process rows
idct32_transpose_and_transform(transpose_buffer, pass1, input);
// process columns
// TODO(cd): do these two steps/passes within the ASM file
idct32_transpose_and_transform(transpose_buffer, pass2, pass1);
// combine and add to dest
// TODO(cd): integrate this within the last storage step of the second pass
idct32_combine_add(dest, pass2, dest_stride);
// restore register we need to preserve
restore_neon_registers();
}
// TODO(cd): Eliminate this file altogether when everything is in ASM file
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