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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include "config/aom_scale_rtcd.h"
#include "aom_scale/aom_scale.h"
#include "aom_mem/aom_mem.h"
/****************************************************************************
* Imports
****************************************************************************/
/****************************************************************************
*
*
* INPUTS : const unsigned char *source : Pointer to source data.
* unsigned int source_width : Stride of source.
* unsigned char *dest : Pointer to destination data.
* unsigned int dest_width : Stride of destination
* (NOT USED).
*
* OUTPUTS : None.
*
* RETURNS : void
*
* FUNCTION : Copies horizontal line of pixels from source to
* destination scaling up by 4 to 5.
*
* SPECIAL NOTES : None.
*
****************************************************************************/
void aom_horizontal_line_5_4_scale_c(const unsigned char *source,
unsigned int source_width,
unsigned char *dest,
unsigned int dest_width) {
const unsigned char *const source_end = source + source_width;
(void)dest_width;
while (source < source_end) {
const unsigned int a = source[0];
const unsigned int b = source[1];
const unsigned int c = source[2];
const unsigned int d = source[3];
const unsigned int e = source[4];
dest[0] = (unsigned char)a;
dest[1] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
dest[2] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
dest[3] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
source += 5;
dest += 4;
}
}
void aom_vertical_band_5_4_scale_c(unsigned char *source, int src_pitch,
unsigned char *dest, int dest_pitch,
unsigned int dest_width) {
const unsigned char *const dest_end = dest + dest_width;
while (dest < dest_end) {
const unsigned int a = source[0 * src_pitch];
const unsigned int b = source[1 * src_pitch];
const unsigned int c = source[2 * src_pitch];
const unsigned int d = source[3 * src_pitch];
const unsigned int e = source[4 * src_pitch];
dest[0 * dest_pitch] = (unsigned char)a;
dest[1 * dest_pitch] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
dest[2 * dest_pitch] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
dest[3 * dest_pitch] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
++source;
++dest;
}
}
/*7***************************************************************************
*
* ROUTINE : aom_horizontal_line_3_5_scale_c
*
* INPUTS : const unsigned char *source : Pointer to source data.
* unsigned int source_width : Stride of source.
* unsigned char *dest : Pointer to destination data.
* unsigned int dest_width : Stride of destination
* (NOT USED).
*
* OUTPUTS : None.
*
* RETURNS : void
*
* FUNCTION : Copies horizontal line of pixels from source to
* destination scaling up by 3 to 5.
*
* SPECIAL NOTES : None.
*
*
****************************************************************************/
void aom_horizontal_line_5_3_scale_c(const unsigned char *source,
unsigned int source_width,
unsigned char *dest,
unsigned int dest_width) {
const unsigned char *const source_end = source + source_width;
(void)dest_width;
while (source < source_end) {
const unsigned int a = source[0];
const unsigned int b = source[1];
const unsigned int c = source[2];
const unsigned int d = source[3];
const unsigned int e = source[4];
dest[0] = (unsigned char)a;
dest[1] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
dest[2] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
source += 5;
dest += 3;
}
}
void aom_vertical_band_5_3_scale_c(unsigned char *source, int src_pitch,
unsigned char *dest, int dest_pitch,
unsigned int dest_width) {
const unsigned char *const dest_end = dest + dest_width;
while (dest < dest_end) {
const unsigned int a = source[0 * src_pitch];
const unsigned int b = source[1 * src_pitch];
const unsigned int c = source[2 * src_pitch];
const unsigned int d = source[3 * src_pitch];
const unsigned int e = source[4 * src_pitch];
dest[0 * dest_pitch] = (unsigned char)a;
dest[1 * dest_pitch] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
dest[2 * dest_pitch] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
++source;
++dest;
}
}
/****************************************************************************
*
* ROUTINE : aom_horizontal_line_1_2_scale_c
*
* INPUTS : const unsigned char *source : Pointer to source data.
* unsigned int source_width : Stride of source.
* unsigned char *dest : Pointer to destination data.
* unsigned int dest_width : Stride of destination
* (NOT USED).
*
* OUTPUTS : None.
*
* RETURNS : void
*
* FUNCTION : Copies horizontal line of pixels from source to
* destination scaling up by 1 to 2.
*
* SPECIAL NOTES : None.
*
****************************************************************************/
void aom_horizontal_line_2_1_scale_c(const unsigned char *source,
unsigned int source_width,
unsigned char *dest,
unsigned int dest_width) {
const unsigned char *const source_end = source + source_width;
(void)dest_width;
while (source < source_end) {
dest[0] = source[0];
source += 2;
++dest;
}
}
void aom_vertical_band_2_1_scale_c(unsigned char *source, int src_pitch,
unsigned char *dest, int dest_pitch,
unsigned int dest_width) {
(void)dest_pitch;
(void)src_pitch;
memcpy(dest, source, dest_width);
}
void aom_vertical_band_2_1_scale_i_c(unsigned char *source, int src_pitch,
unsigned char *dest, int dest_pitch,
unsigned int dest_width) {
const unsigned char *const dest_end = dest + dest_width;
(void)dest_pitch;
while (dest < dest_end) {
const unsigned int a = source[-src_pitch] * 3;
const unsigned int b = source[0] * 10;
const unsigned int c = source[src_pitch] * 3;
dest[0] = (unsigned char)((8 + a + b + c) >> 4);
++source;
++dest;
}
}
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