diff options
Diffstat (limited to 'media/libvpx/libvpx/vpx_scale/generic/gen_scalers.c')
| -rw-r--r-- | media/libvpx/libvpx/vpx_scale/generic/gen_scalers.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_scale/generic/gen_scalers.c b/media/libvpx/libvpx/vpx_scale/generic/gen_scalers.c new file mode 100644 index 0000000000..d8db4b3547 --- /dev/null +++ b/media/libvpx/libvpx/vpx_scale/generic/gen_scalers.c @@ -0,0 +1,228 @@ +/* + * 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_scale_rtcd.h" +#include "vpx_scale/vpx_scale.h" +#include "vpx_mem/vpx_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 dest (UNUSED). + * + * OUTPUTS : None. + * + * RETURNS : void + * + * FUNCTION : Copies horizontal line of pixels from source to + * destination scaling up by 4 to 5. + * + * SPECIAL NOTES : None. + * + ****************************************************************************/ +void vp8_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 vp8_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 : vp8_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 dest (UNUSED). + * + * OUTPUTS : None. + * + * RETURNS : void + * + * FUNCTION : Copies horizontal line of pixels from source to + * destination scaling up by 3 to 5. + * + * SPECIAL NOTES : None. + * + * + ****************************************************************************/ +void vp8_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 vp8_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 : vp8_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 dest (UNUSED). + * + * OUTPUTS : None. + * + * RETURNS : void + * + * FUNCTION : Copies horizontal line of pixels from source to + * destination scaling up by 1 to 2. + * + * SPECIAL NOTES : None. + * + ****************************************************************************/ +void vp8_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 vp8_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; + memcpy(dest, source, dest_width); +} + +void vp8_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); + } +} |