c2140b8af1
Changes 'The VP8 project' to 'The WebM project', for consistency with other webmproject.org repositories. Fixes issue #97. Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba
957 lines
28 KiB
C
957 lines
28 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vpx_scale/vpxscale.h"
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#include "vpx_mem/vpx_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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* ROUTINE : vp8cx_horizontal_line_4_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 (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 vp8cx_horizontal_line_4_5_scale_c
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(
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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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)
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{
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unsigned i;
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unsigned int a, b, c;
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unsigned char *des = dest;
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const unsigned char *src = source;
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(void) dest_width;
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for (i = 0; i < source_width - 4; i += 4)
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{
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a = src[0];
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b = src[1];
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des [0] = (unsigned char) a;
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des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
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c = src[2] * 154;
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a = src[3];
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des [2] = (unsigned char)((b * 102 + c + 128) >> 8);
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des [3] = (unsigned char)((c + 102 * a + 128) >> 8);
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b = src[4];
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des [4] = (unsigned char)((a * 205 + 51 * b + 128) >> 8);
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src += 4;
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des += 5;
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}
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a = src[0];
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b = src[1];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
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c = src[2] * 154;
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a = src[3];
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des [2] = (unsigned char)((b * 102 + c + 128) >> 8);
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des [3] = (unsigned char)((c + 102 * a + 128) >> 8);
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des [4] = (unsigned char)(a);
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_vertical_band_4_5_scale_c
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*
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* INPUTS : unsigned char *dest : Pointer to destination data.
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* unsigned int dest_pitch : Stride of destination data.
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* unsigned int dest_width : Width of destination data.
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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 : Scales vertical band of pixels by scale 4 to 5. The
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* height of the band scaled is 4-pixels.
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*
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* SPECIAL NOTES : The routine uses the first line of the band below
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* the current band.
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*
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****************************************************************************/
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void vp8cx_vertical_band_4_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
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{
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unsigned int i;
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unsigned int a, b, c, d;
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unsigned char *des = dest;
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for (i = 0; i < dest_width; i++)
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{
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a = des [0];
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b = des [dest_pitch];
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des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
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c = des[dest_pitch*2] * 154;
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d = des[dest_pitch*3];
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des [dest_pitch*2] = (unsigned char)((b * 102 + c + 128) >> 8);
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des [dest_pitch*3] = (unsigned char)((c + 102 * d + 128) >> 8);
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// First line in next band
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a = des [dest_pitch * 5];
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des [dest_pitch * 4] = (unsigned char)((d * 205 + 51 * a + 128) >> 8);
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des ++;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_last_vertical_band_4_5_scale_c
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*
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* INPUTS : unsigned char *dest : Pointer to destination data.
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* unsigned int dest_pitch : Stride of destination data.
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* unsigned int dest_width : Width of destination data.
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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 : Scales last vertical band of pixels by scale 4 to 5. The
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* height of the band scaled is 4-pixels.
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*
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* SPECIAL NOTES : The routine does not have available the first line of
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* the band below the current band, since this is the
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* last band.
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*
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****************************************************************************/
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void vp8cx_last_vertical_band_4_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
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{
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unsigned int i;
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unsigned int a, b, c, d;
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unsigned char *des = dest;
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for (i = 0; i < dest_width; ++i)
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{
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a = des[0];
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b = des[dest_pitch];
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des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
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c = des[dest_pitch*2] * 154;
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d = des[dest_pitch*3];
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des [dest_pitch*2] = (unsigned char)((b * 102 + c + 128) >> 8);
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des [dest_pitch*3] = (unsigned char)((c + 102 * d + 128) >> 8);
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// No other line for interplation of this line, so ..
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des[dest_pitch*4] = (unsigned char) d;
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des++;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_horizontal_line_2_3_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 (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 2 to 3.
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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 vp8cx_horizontal_line_2_3_scale_c
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(
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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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)
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{
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unsigned int i;
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unsigned int a, b, c;
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unsigned char *des = dest;
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const unsigned char *src = source;
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(void) dest_width;
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for (i = 0; i < source_width - 2; i += 2)
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{
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a = src[0];
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b = src[1];
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c = src[2];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
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des [2] = (unsigned char)((b * 171 + 85 * c + 128) >> 8);
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src += 2;
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des += 3;
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}
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a = src[0];
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b = src[1];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
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des [2] = (unsigned char)(b);
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_vertical_band_2_3_scale_c
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*
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* INPUTS : unsigned char *dest : Pointer to destination data.
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* unsigned int dest_pitch : Stride of destination data.
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* unsigned int dest_width : Width of destination data.
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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 : Scales vertical band of pixels by scale 2 to 3. The
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* height of the band scaled is 2-pixels.
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*
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* SPECIAL NOTES : The routine uses the first line of the band below
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* the current band.
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*
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****************************************************************************/
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void vp8cx_vertical_band_2_3_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
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{
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unsigned int i;
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unsigned int a, b, c;
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unsigned char *des = dest;
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for (i = 0; i < dest_width; i++)
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{
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a = des [0];
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b = des [dest_pitch];
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c = des[dest_pitch*3];
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des [dest_pitch ] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
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des [dest_pitch*2] = (unsigned char)((b * 171 + 85 * c + 128) >> 8);
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des++;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_last_vertical_band_2_3_scale_c
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*
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* INPUTS : unsigned char *dest : Pointer to destination data.
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* unsigned int dest_pitch : Stride of destination data.
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* unsigned int dest_width : Width of destination data.
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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 : Scales last vertical band of pixels by scale 2 to 3. The
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* height of the band scaled is 2-pixels.
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*
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* SPECIAL NOTES : The routine does not have available the first line of
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* the band below the current band, since this is the
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* last band.
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*
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****************************************************************************/
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void vp8cx_last_vertical_band_2_3_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
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{
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unsigned int i;
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unsigned int a, b;
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unsigned char *des = dest;
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for (i = 0; i < dest_width; ++i)
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{
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a = des [0];
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b = des [dest_pitch];
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des [dest_pitch ] = (unsigned char)((a * 85 + 171 * b + 128) >> 8);
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des [dest_pitch*2] = (unsigned char)(b);
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des++;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_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 (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 vp8cx_horizontal_line_3_5_scale_c
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(
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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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)
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{
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unsigned int i;
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unsigned int a, b, c;
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unsigned char *des = dest;
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const unsigned char *src = source;
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(void) dest_width;
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for (i = 0; i < source_width - 3; i += 3)
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{
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a = src[0];
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b = src[1];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
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c = src[2] ;
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des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
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des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
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a = src[3];
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des [4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8);
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src += 3;
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des += 5;
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}
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a = src[0];
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b = src[1];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
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c = src[2] ;
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des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
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des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
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des [4] = (unsigned char)(c);
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_vertical_band_3_5_scale_c
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*
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* INPUTS : unsigned char *dest : Pointer to destination data.
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* unsigned int dest_pitch : Stride of destination data.
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* unsigned int dest_width : Width of destination data.
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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 : Scales vertical band of pixels by scale 3 to 5. The
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* height of the band scaled is 3-pixels.
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*
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* SPECIAL NOTES : The routine uses the first line of the band below
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* the current band.
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*
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****************************************************************************/
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void vp8cx_vertical_band_3_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
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{
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unsigned int i;
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unsigned int a, b, c;
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unsigned char *des = dest;
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for (i = 0; i < dest_width; i++)
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{
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a = des [0];
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b = des [dest_pitch];
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des [dest_pitch] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
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c = des[dest_pitch*2];
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des [dest_pitch*2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
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des [dest_pitch*3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
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// First line in next band...
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a = des [dest_pitch * 5];
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des [dest_pitch * 4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8);
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des++;
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}
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}
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/****************************************************************************
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*
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* ROUTINE : vp8cx_last_vertical_band_3_5_scale_c
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*
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* INPUTS : unsigned char *dest : Pointer to destination data.
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* unsigned int dest_pitch : Stride of destination data.
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* unsigned int dest_width : Width of destination data.
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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 : Scales last vertical band of pixels by scale 3 to 5. The
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* height of the band scaled is 3-pixels.
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*
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* SPECIAL NOTES : The routine does not have available the first line of
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* the band below the current band, since this is the
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* last band.
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*
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****************************************************************************/
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void vp8cx_last_vertical_band_3_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
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{
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unsigned int i;
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unsigned int a, b, c;
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unsigned char *des = dest;
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for (i = 0; i < dest_width; ++i)
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{
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a = des [0];
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b = des [dest_pitch];
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des [ dest_pitch ] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
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c = des[dest_pitch*2];
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des [dest_pitch*2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
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des [dest_pitch*3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
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// No other line for interplation of this line, so ..
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des [ dest_pitch * 4 ] = (unsigned char)(c) ;
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des++;
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}
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}
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|
/****************************************************************************
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*
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* ROUTINE : vp8cx_horizontal_line_3_4_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.
|
|
* unsigned int dest_width : Stride of destination (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 4.
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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 vp8cx_horizontal_line_3_4_scale_c
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|
(
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const unsigned char *source,
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unsigned int source_width,
|
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unsigned char *dest,
|
|
unsigned int dest_width
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)
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|
{
|
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unsigned int i;
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|
unsigned int a, b, c;
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unsigned char *des = dest;
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const unsigned char *src = source;
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|
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(void) dest_width;
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|
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for (i = 0; i < source_width - 3; i += 3)
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{
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a = src[0];
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b = src[1];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
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c = src[2];
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des [2] = (unsigned char)((b + c + 1) >> 1);
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a = src[3];
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des [3] = (unsigned char)((c * 192 + a * 64 + 128) >> 8);
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src += 3;
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des += 4;
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}
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a = src[0];
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b = src[1];
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des [0] = (unsigned char)(a);
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des [1] = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
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c = src[2] ;
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des [2] = (unsigned char)((b + c + 1) >> 1);
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des [3] = (unsigned char)(c);
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}
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|
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/****************************************************************************
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*
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* ROUTINE : vp8cx_vertical_band_3_4_scale_c
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|
*
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|
* INPUTS : unsigned char *dest : Pointer to destination data.
|
|
* unsigned int dest_pitch : Stride of destination data.
|
|
* unsigned int dest_width : Width of destination data.
|
|
*
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|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : void
|
|
*
|
|
* FUNCTION : Scales vertical band of pixels by scale 3 to 4. The
|
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* height of the band scaled is 3-pixels.
|
|
*
|
|
* SPECIAL NOTES : The routine uses the first line of the band below
|
|
* the current band.
|
|
*
|
|
****************************************************************************/
|
|
void vp8cx_vertical_band_3_4_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b, c;
|
|
unsigned char *des = dest;
|
|
|
|
for (i = 0; i < dest_width; i++)
|
|
{
|
|
a = des [0];
|
|
b = des [dest_pitch];
|
|
des [dest_pitch] = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
|
|
|
|
c = des[dest_pitch*2];
|
|
des [dest_pitch*2] = (unsigned char)((b + c + 1) >> 1);
|
|
|
|
// First line in next band...
|
|
a = des [dest_pitch*4];
|
|
des [dest_pitch*3] = (unsigned char)((c * 192 + a * 64 + 128) >> 8);
|
|
|
|
des++;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_last_vertical_band_3_4_scale_c
|
|
*
|
|
* INPUTS : unsigned char *dest : Pointer to destination data.
|
|
* unsigned int dest_pitch : Stride of destination data.
|
|
* unsigned int dest_width : Width of destination data.
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : void
|
|
*
|
|
* FUNCTION : Scales last vertical band of pixels by scale 3 to 4. The
|
|
* height of the band scaled is 3-pixels.
|
|
*
|
|
* SPECIAL NOTES : The routine does not have available the first line of
|
|
* the band below the current band, since this is the
|
|
* last band.
|
|
*
|
|
****************************************************************************/
|
|
void vp8cx_last_vertical_band_3_4_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b, c;
|
|
unsigned char *des = dest;
|
|
|
|
for (i = 0; i < dest_width; ++i)
|
|
{
|
|
a = des [0];
|
|
b = des [dest_pitch];
|
|
|
|
des [dest_pitch] = (unsigned char)((a * 64 + b * 192 + 128) >> 8);
|
|
|
|
c = des[dest_pitch*2];
|
|
des [dest_pitch*2] = (unsigned char)((b + c + 1) >> 1);
|
|
|
|
// No other line for interplation of this line, so ..
|
|
des [dest_pitch*3] = (unsigned char)(c);
|
|
|
|
des++;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_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 vp8cx_horizontal_line_1_2_scale_c
|
|
(
|
|
const unsigned char *source,
|
|
unsigned int source_width,
|
|
unsigned char *dest,
|
|
unsigned int dest_width
|
|
)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b;
|
|
unsigned char *des = dest;
|
|
const unsigned char *src = source;
|
|
|
|
(void) dest_width;
|
|
|
|
for (i = 0; i < source_width - 1; i += 1)
|
|
{
|
|
a = src[0];
|
|
b = src[1];
|
|
des [0] = (unsigned char)(a);
|
|
des [1] = (unsigned char)((a + b + 1) >> 1);
|
|
src += 1;
|
|
des += 2;
|
|
}
|
|
|
|
a = src[0];
|
|
des [0] = (unsigned char)(a);
|
|
des [1] = (unsigned char)(a);
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_vertical_band_1_2_scale_c
|
|
*
|
|
* INPUTS : unsigned char *dest : Pointer to destination data.
|
|
* unsigned int dest_pitch : Stride of destination data.
|
|
* unsigned int dest_width : Width of destination data.
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : void
|
|
*
|
|
* FUNCTION : Scales vertical band of pixels by scale 1 to 2. The
|
|
* height of the band scaled is 1-pixel.
|
|
*
|
|
* SPECIAL NOTES : The routine uses the first line of the band below
|
|
* the current band.
|
|
*
|
|
****************************************************************************/
|
|
void vp8cx_vertical_band_1_2_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b;
|
|
unsigned char *des = dest;
|
|
|
|
for (i = 0; i < dest_width; i++)
|
|
{
|
|
a = des [0];
|
|
b = des [dest_pitch * 2];
|
|
|
|
des[dest_pitch] = (unsigned char)((a + b + 1) >> 1);
|
|
|
|
des++;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_last_vertical_band_1_2_scale_c
|
|
*
|
|
* INPUTS : unsigned char *dest : Pointer to destination data.
|
|
* unsigned int dest_pitch : Stride of destination data.
|
|
* unsigned int dest_width : Width of destination data.
|
|
*
|
|
* OUTPUTS : None.
|
|
*
|
|
* RETURNS : void
|
|
*
|
|
* FUNCTION : Scales last vertical band of pixels by scale 1 to 2. The
|
|
* height of the band scaled is 1-pixel.
|
|
*
|
|
* SPECIAL NOTES : The routine does not have available the first line of
|
|
* the band below the current band, since this is the
|
|
* last band.
|
|
*
|
|
****************************************************************************/
|
|
void vp8cx_last_vertical_band_1_2_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
unsigned int i;
|
|
unsigned char *des = dest;
|
|
|
|
for (i = 0; i < dest_width; ++i)
|
|
{
|
|
des[dest_pitch] = des[0];
|
|
des++;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_horizontal_line_4_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 4 to 5.
|
|
*
|
|
* SPECIAL NOTES : None.
|
|
*
|
|
****************************************************************************/
|
|
void vp8cx_horizontal_line_5_4_scale_c
|
|
(
|
|
const unsigned char *source,
|
|
unsigned int source_width,
|
|
unsigned char *dest,
|
|
unsigned int dest_width
|
|
)
|
|
{
|
|
unsigned i;
|
|
unsigned int a, b, c, d, e;
|
|
unsigned char *des = dest;
|
|
const unsigned char *src = source;
|
|
|
|
(void) dest_width;
|
|
|
|
for (i = 0; i < source_width; i += 5)
|
|
{
|
|
a = src[0];
|
|
b = src[1];
|
|
c = src[2];
|
|
d = src[3];
|
|
e = src[4];
|
|
|
|
des[0] = (unsigned char) a;
|
|
des[1] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
|
|
des[2] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
|
|
des[3] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
|
|
|
|
src += 5;
|
|
des += 4;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
void vp8cx_vertical_band_5_4_scale_c(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b, c, d, e;
|
|
unsigned char *des = dest;
|
|
unsigned char *src = source;
|
|
|
|
for (i = 0; i < dest_width; i++)
|
|
{
|
|
|
|
a = src[0 * src_pitch];
|
|
b = src[1 * src_pitch];
|
|
c = src[2 * src_pitch];
|
|
d = src[3 * src_pitch];
|
|
e = src[4 * src_pitch];
|
|
|
|
des[0 * dest_pitch] = (unsigned char) a;
|
|
des[1 * dest_pitch] = (unsigned char)((b * 192 + c * 64 + 128) >> 8);
|
|
des[2 * dest_pitch] = (unsigned char)((c * 128 + d * 128 + 128) >> 8);
|
|
des[3 * dest_pitch] = (unsigned char)((d * 64 + e * 192 + 128) >> 8);
|
|
|
|
src ++;
|
|
des ++;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
/*7***************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_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 vp8cx_horizontal_line_5_3_scale_c
|
|
(
|
|
const unsigned char *source,
|
|
unsigned int source_width,
|
|
unsigned char *dest,
|
|
unsigned int dest_width
|
|
)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b, c, d , e;
|
|
unsigned char *des = dest;
|
|
const unsigned char *src = source;
|
|
|
|
(void) dest_width;
|
|
|
|
for (i = 0; i < source_width; i += 5)
|
|
{
|
|
a = src[0];
|
|
b = src[1];
|
|
c = src[2];
|
|
d = src[3];
|
|
e = src[4];
|
|
|
|
des[0] = (unsigned char) a;
|
|
des[1] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
|
|
des[2] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
|
|
|
|
src += 5;
|
|
des += 3;
|
|
}
|
|
|
|
}
|
|
|
|
void vp8cx_vertical_band_5_3_scale_c(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a, b, c, d, e;
|
|
unsigned char *des = dest;
|
|
unsigned char *src = source;
|
|
|
|
for (i = 0; i < dest_width; i++)
|
|
{
|
|
|
|
a = src[0 * src_pitch];
|
|
b = src[1 * src_pitch];
|
|
c = src[2 * src_pitch];
|
|
d = src[3 * src_pitch];
|
|
e = src[4 * src_pitch];
|
|
|
|
des[0 * dest_pitch] = (unsigned char) a;
|
|
des[1 * dest_pitch] = (unsigned char)((b * 85 + c * 171 + 128) >> 8);
|
|
des[2 * dest_pitch] = (unsigned char)((d * 171 + e * 85 + 128) >> 8);
|
|
|
|
src ++;
|
|
des ++;
|
|
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* ROUTINE : vp8cx_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 vp8cx_horizontal_line_2_1_scale_c
|
|
(
|
|
const unsigned char *source,
|
|
unsigned int source_width,
|
|
unsigned char *dest,
|
|
unsigned int dest_width
|
|
)
|
|
{
|
|
unsigned int i;
|
|
unsigned int a;
|
|
unsigned char *des = dest;
|
|
const unsigned char *src = source;
|
|
|
|
(void) dest_width;
|
|
|
|
for (i = 0; i < source_width; i += 2)
|
|
{
|
|
a = src[0];
|
|
des [0] = (unsigned char)(a);
|
|
src += 2;
|
|
des += 1;
|
|
}
|
|
|
|
|
|
|
|
}
|
|
void vp8cx_vertical_band_2_1_scale_c(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
(void) dest_pitch;
|
|
(void) src_pitch;
|
|
vpx_memcpy(dest, source, dest_width);
|
|
}
|
|
|
|
void vp8cx_vertical_band_2_1_scale_i_c(unsigned char *source, unsigned int src_pitch, unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
|
|
{
|
|
int i;
|
|
int temp;
|
|
int width = dest_width;
|
|
|
|
(void) dest_pitch;
|
|
|
|
for (i = 0; i < width; i++)
|
|
{
|
|
temp = 8;
|
|
temp += source[i-(int)src_pitch] * 3;
|
|
temp += source[i] * 10;
|
|
temp += source[i+src_pitch] * 3;
|
|
temp >>= 4 ;
|
|
dest[i] = (unsigned char)(temp);
|
|
}
|
|
|
|
}
|