d650f276ce
This avoids explicitly casting them to 'int' later. These methods were already called with signed int arguments for pitch, so this also avoids int -> unsigned int -> int conversion. Change-Id: I2129f5ceff8f2525a188ee3ae52f9fe7067bd2e3
201 lines
7.4 KiB
C
201 lines
7.4 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include "./aom_scale_rtcd.h"
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#include "aom_scale/aom_scale.h"
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#include "aom_mem/aom_mem.h"
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/****************************************************************************
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* Imports
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****************************************************************************/
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/****************************************************************************
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*
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*
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* INPUTS : const unsigned char *source : Pointer to source data.
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* unsigned int source_width : Stride of source.
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* unsigned char *dest : Pointer to destination data.
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* unsigned int dest_width : Stride of destination
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* (NOT USED).
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Copies horizontal line of pixels from source to
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* destination scaling up by 4 to 5.
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*
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* SPECIAL NOTES : None.
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*
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****************************************************************************/
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void aom_horizontal_line_5_4_scale_c(const unsigned char *source,
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unsigned int source_width,
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unsigned char *dest,
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unsigned int dest_width) {
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const unsigned char *const source_end = source + source_width;
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(void)dest_width;
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while (source < source_end) {
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const unsigned int a = source[0];
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const unsigned int b = source[1];
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const unsigned int c = source[2];
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const unsigned int d = source[3];
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const unsigned int e = source[4];
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dest[0] = (unsigned char)a;
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dest[1] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
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dest[2] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
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dest[3] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
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source += 5;
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dest += 4;
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}
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}
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void aom_vertical_band_5_4_scale_c(unsigned char *source, int src_pitch,
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unsigned char *dest, int dest_pitch,
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unsigned int dest_width) {
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const unsigned char *const dest_end = dest + dest_width;
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while (dest < dest_end) {
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const unsigned int a = source[0 * src_pitch];
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const unsigned int b = source[1 * src_pitch];
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const unsigned int c = source[2 * src_pitch];
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const unsigned int d = source[3 * src_pitch];
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const unsigned int e = source[4 * src_pitch];
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dest[0 * dest_pitch] = (unsigned char)a;
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dest[1 * dest_pitch] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
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dest[2 * dest_pitch] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
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dest[3 * dest_pitch] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
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++source;
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++dest;
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}
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}
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/*7***************************************************************************
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*
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* ROUTINE : aom_horizontal_line_3_5_scale_c
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*
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* INPUTS : const unsigned char *source : Pointer to source data.
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* unsigned int source_width : Stride of source.
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* unsigned char *dest : Pointer to destination data.
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* unsigned int dest_width : Stride of destination
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* (NOT USED).
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Copies horizontal line of pixels from source to
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* destination scaling up by 3 to 5.
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*
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* SPECIAL NOTES : None.
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*
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*
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****************************************************************************/
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void aom_horizontal_line_5_3_scale_c(const unsigned char *source,
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unsigned int source_width,
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unsigned char *dest,
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unsigned int dest_width) {
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const unsigned char *const source_end = source + source_width;
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(void)dest_width;
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while (source < source_end) {
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const unsigned int a = source[0];
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const unsigned int b = source[1];
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const unsigned int c = source[2];
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const unsigned int d = source[3];
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const unsigned int e = source[4];
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dest[0] = (unsigned char)a;
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dest[1] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
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dest[2] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
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source += 5;
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dest += 3;
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}
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}
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void aom_vertical_band_5_3_scale_c(unsigned char *source, int src_pitch,
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unsigned char *dest, int dest_pitch,
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unsigned int dest_width) {
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const unsigned char *const dest_end = dest + dest_width;
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while (dest < dest_end) {
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const unsigned int a = source[0 * src_pitch];
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const unsigned int b = source[1 * src_pitch];
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const unsigned int c = source[2 * src_pitch];
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const unsigned int d = source[3 * src_pitch];
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const unsigned int e = source[4 * src_pitch];
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dest[0 * dest_pitch] = (unsigned char)a;
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dest[1 * dest_pitch] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
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dest[2 * dest_pitch] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
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++source;
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++dest;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : aom_horizontal_line_1_2_scale_c
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*
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* INPUTS : const unsigned char *source : Pointer to source data.
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* unsigned int source_width : Stride of source.
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* unsigned char *dest : Pointer to destination data.
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* unsigned int dest_width : Stride of destination
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* (NOT USED).
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*
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* OUTPUTS : None.
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*
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* RETURNS : void
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*
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* FUNCTION : Copies horizontal line of pixels from source to
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* destination scaling up by 1 to 2.
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*
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* SPECIAL NOTES : None.
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*
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****************************************************************************/
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void aom_horizontal_line_2_1_scale_c(const unsigned char *source,
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unsigned int source_width,
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unsigned char *dest,
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unsigned int dest_width) {
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const unsigned char *const source_end = source + source_width;
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(void)dest_width;
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while (source < source_end) {
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dest[0] = source[0];
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source += 2;
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++dest;
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}
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}
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void aom_vertical_band_2_1_scale_c(unsigned char *source, int src_pitch,
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unsigned char *dest, int dest_pitch,
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unsigned int dest_width) {
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(void)dest_pitch;
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(void)src_pitch;
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memcpy(dest, source, dest_width);
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}
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void aom_vertical_band_2_1_scale_i_c(unsigned char *source, int src_pitch,
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unsigned char *dest, int dest_pitch,
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unsigned int dest_width) {
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const unsigned char *const dest_end = dest + dest_width;
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(void)dest_pitch;
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while (dest < dest_end) {
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const unsigned int a = source[-src_pitch] * 3;
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const unsigned int b = source[0] * 10;
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const unsigned int c = source[src_pitch] * 3;
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dest[0] = (unsigned char)((8 + a + b + c) >> 4);
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++source;
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++dest;
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}
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}
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