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-rw-r--r--media/libvpx/libvpx/vpx_scale/generic/gen_scalers.c228
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
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+++ 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);
+ }
+}
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