| /* |
| * 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; |
| } |
| } |