vpx/vp8/decoder/arm/neon/idct_blk_neon.c

/*
 *  Copyright (c) 2010 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 "vpx_config.h"
#include "vp8/common/idct.h"
#include "vp8/decoder/dequantize.h"

/* place these declarations here because we don't want to maintain them
 * outside of this scope
 */
void idct_dequant_dc_full_2x_neon(short *input, short *dq,
                                  unsigned char *dst,
                                  int stride, short *dc);
void idct_dequant_dc_0_2x_neon(short *input, short *dq,
                               unsigned char *dst,
                               int stride, short *dc);
void idct_dequant_full_2x_neon(short *q, short *dq,
                               unsigned char *dst, int stride);
void idct_dequant_0_2x_neon(short *q, short dq,
                            unsigned char *dst, int stride);

void vp8_dequant_dc_idct_add_y_block_neon(short *q, short *dq,
                                          unsigned char *dst,
                                          int stride, char *eobs, short *dc)
{
    int i;

    for (i = 0; i < 4; i++)
    {
        if (((short *)(eobs))[0])
        {
            if (((short *)eobs)[0] & 0xfefe)
                idct_dequant_dc_full_2x_neon (q, dq, dst, stride, dc);
            else
                idct_dequant_dc_0_2x_neon(q, dq, dst, stride, dc);
        }

        if (((short *)(eobs))[1])
        {
            if (((short *)eobs)[1] & 0xfefe)
                idct_dequant_dc_full_2x_neon (q+32, dq, dst+8, stride, dc+2);
            else
                idct_dequant_dc_0_2x_neon(q+32, dq, dst+8, stride, dc+2);
        }
        q    += 64;
        dc   += 4;
        dst  += 4*stride;
        eobs += 4;
    }
}

void vp8_dequant_idct_add_y_block_neon(short *q, short *dq,
                                       unsigned char *dst,
                                       int stride, char *eobs)
{
    int i;

    for (i = 0; i < 4; i++)
    {
        if (((short *)(eobs))[0])
        {
            if (((short *)eobs)[0] & 0xfefe)
                idct_dequant_full_2x_neon (q, dq, dst, stride);
            else
                idct_dequant_0_2x_neon (q, dq[0], dst, stride);
        }

        if (((short *)(eobs))[1])
        {
            if (((short *)eobs)[1] & 0xfefe)
                idct_dequant_full_2x_neon (q+32, dq, dst+8, stride);
            else
                idct_dequant_0_2x_neon (q+32, dq[0], dst+8, stride);
        }
        q    += 64;
        dst  += 4*stride;
        eobs += 4;
    }
}

void vp8_dequant_idct_add_uv_block_neon(short *q, short *dq,
                                        unsigned char *dstu,
                                        unsigned char *dstv,
                                        int stride, char *eobs)
{
    if (((short *)(eobs))[0])
    {
        if (((short *)eobs)[0] & 0xfefe)
            idct_dequant_full_2x_neon (q, dq, dstu, stride);
        else
            idct_dequant_0_2x_neon (q, dq[0], dstu, stride);
    }

    q    += 32;
    dstu += 4*stride;

    if (((short *)(eobs))[1])
    {
        if (((short *)eobs)[1] & 0xfefe)
            idct_dequant_full_2x_neon (q, dq, dstu, stride);
        else
            idct_dequant_0_2x_neon (q, dq[0], dstu, stride);
    }

    q += 32;

    if (((short *)(eobs))[2])
    {
        if (((short *)eobs)[2] & 0xfefe)
            idct_dequant_full_2x_neon (q, dq, dstv, stride);
        else
            idct_dequant_0_2x_neon (q, dq[0], dstv, stride);
    }

    q    += 32;
    dstv += 4*stride;

    if (((short *)(eobs))[3])
    {
        if (((short *)eobs)[3] & 0xfefe)
            idct_dequant_full_2x_neon (q, dq, dstv, stride);
        else
            idct_dequant_0_2x_neon (q, dq[0], dstv, stride);
    }
}