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-/*
- * Copyright (c) 2011 The LibYuv 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 "libyuv/general.h"
-
-#include <string.h> // memcpy(), memset()
-
-#include "libyuv/planar_functions.h"
-
-namespace libyuv {
-
-int
-I420Mirror(const uint8* src_yplane, int src_ystride,
- const uint8* src_uplane, int src_ustride,
- const uint8* src_vplane, int src_vstride,
- uint8* dst_yplane, int dst_ystride,
- uint8* dst_uplane, int dst_ustride,
- uint8* dst_vplane, int dst_vstride,
- int width, int height) {
- if (src_yplane == NULL || src_uplane == NULL || src_vplane == NULL ||
- dst_yplane == NULL || dst_uplane == NULL || dst_vplane == NULL) {
- return -1;
- }
-
- int indO = 0;
- int indS = 0;
- int wind, hind;
- uint8 tmpVal, tmpValU, tmpValV;
- // Will swap two values per iteration
- const int halfWidth = (width + 1) >> 1;
-
- // Y
- for (wind = 0; wind < halfWidth; wind++) {
- for (hind = 0; hind < height; hind++) {
- indO = hind * src_ystride + wind;
- indS = hind * dst_ystride + (width - wind - 1);
- tmpVal = src_yplane[indO];
- dst_yplane[indO] = src_yplane[indS];
- dst_yplane[indS] = tmpVal;
- }
- }
-
- const int halfHeight = (height + 1) >> 1;
- const int halfSrcuvStride = (height + 1) >> 1;
- const int halfuvWidth = (width + 1) >> 2;
-
- for (wind = 0; wind < halfuvWidth; wind++) {
- for (hind = 0; hind < halfHeight; hind++) {
- indO = hind * halfSrcuvStride + wind;
- indS = hind * halfSrcuvStride + (halfuvWidth - wind - 1);
- // U
- tmpValU = src_uplane[indO];
- dst_uplane[indO] = src_uplane[indS];
- dst_uplane[indS] = tmpValU;
- // V
- tmpValV = src_vplane[indO];
- dst_vplane[indO] = src_vplane[indS];
- dst_vplane[indS] = tmpValV;
- }
- }
- return 0;
-}
-
-// Make a center cut
-int
-I420Crop(uint8* frame,
- int src_width, int src_height,
- int dst_width, int dst_height)
-{
- if (frame == NULL)
- return -1;
-
- if (src_width == dst_width && src_height == dst_height) {
- // Nothing to do
- return 3 * dst_height * dst_width / 2;
- }
- if (dst_width > src_width || dst_height > src_height) {
- // error
- return -1;
- }
- int i = 0;
- int m = 0;
- int loop = 0;
- int half_dst_width = dst_width / 2;
- int halfdst_height = dst_height / 2;
- int halfsrc_width = src_width / 2;
- int half_dst_height= src_height / 2;
- int crop_height = ( src_height - dst_height ) / 2;
- int crop_width = ( src_width - dst_width ) / 2;
-
- for (i = src_width * crop_height + crop_width; loop < dst_height ;
- loop++, i += src_width) {
- memcpy(&frame[m],&frame[i],dst_width);
- m += dst_width;
- }
- i = src_width * src_height; // ilum
- loop = 0;
- for ( i += (halfsrc_width * crop_height / 2 + crop_width / 2);
- loop < halfdst_height; loop++,i += halfsrc_width) {
- memcpy(&frame[m],&frame[i],half_dst_width);
- m += half_dst_width;
- }
- loop = 0;
- i = src_width * src_height + half_dst_height * halfsrc_width; // ilum + Cr
- for ( i += (halfsrc_width * crop_height / 2 + crop_width / 2);
- loop < halfdst_height; loop++, i += halfsrc_width) {
- memcpy(&frame[m],&frame[i],half_dst_width);
- m += half_dst_width;
- }
- return 0;
-}
-
-
-int
-I420CropPad(const uint8* src_frame, int src_width,
- int src_height, uint8* dst_frame,
- int dst_width, int dst_height)
-{
- if (src_width < 1 || dst_width < 1 || src_height < 1 || dst_height < 1) {
- return -1;
- }
- if (src_width == dst_width && src_height == dst_height) {
- memcpy(dst_frame, src_frame, 3 * dst_width * (dst_height >> 1));
- } else {
- if (src_height < dst_height) {
- // pad height
- int pad_height = dst_height - src_height;
- int i = 0;
- int pad_width = 0;
- int crop_width = 0;
- int width = src_width;
- if (src_width < dst_width) {
- // pad width
- pad_width = dst_width - src_width;
- } else {
- // cut width
- crop_width = src_width - dst_width;
- width = dst_width;
- }
- if (pad_height) {
- memset(dst_frame, 0, dst_width * (pad_height >> 1));
- dst_frame += dst_width * (pad_height >> 1);
- }
- for (i = 0; i < src_height;i++) {
- if (pad_width) {
- memset(dst_frame, 0, pad_width / 2);
- dst_frame += pad_width / 2;
- }
- src_frame += crop_width >> 1; // in case we have a cut
- memcpy(dst_frame,src_frame ,width);
- src_frame += crop_width >> 1;
- dst_frame += width;
- src_frame += width;
- if (pad_width) {
- memset(dst_frame, 0, pad_width / 2);
- dst_frame += pad_width / 2;
- }
- }
- if (pad_height) {
- memset(dst_frame, 0, dst_width * (pad_height >> 1));
- dst_frame += dst_width * (pad_height >> 1);
- }
- if (pad_height) {
- memset(dst_frame, 127, (dst_width >> 2) * (pad_height >> 1));
- dst_frame += (dst_width >> 2) * (pad_height >> 1);
- }
- for (i = 0; i < (src_height >> 1); i++) {
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- src_frame += crop_width >> 2; // in case we have a cut
- memcpy(dst_frame, src_frame,width >> 1);
- src_frame += crop_width >> 2;
- dst_frame += width >> 1;
- src_frame += width >> 1;
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- }
- if (pad_height) {
- memset(dst_frame, 127, (dst_width >> 1) * (pad_height >> 1));
- dst_frame += (dst_width >> 1) * (pad_height >> 1);
- }
- for (i = 0; i < (src_height >> 1); i++) {
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- src_frame += crop_width >> 2; // in case we have a cut
- memcpy(dst_frame, src_frame,width >> 1);
- src_frame += crop_width >> 2;
- dst_frame += width >> 1;
- src_frame += width >> 1;
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- }
- if (pad_height) {
- memset(dst_frame, 127, (dst_width >> 2) * (pad_height >> 1));
- dst_frame += (dst_width >> 2) * (pad_height >> 1);
- }
- } else {
- // cut height
- int i = 0;
- int pad_width = 0;
- int crop_width = 0;
- int width = src_width;
-
- if (src_width < dst_width) {
- // pad width
- pad_width = dst_width - src_width;
- } else {
- // cut width
- crop_width = src_width - dst_width;
- width = dst_width;
- }
- int diff_height = src_height - dst_height;
- src_frame += src_width * (diff_height >> 1); // skip top I
-
- for (i = 0; i < dst_height; i++) {
- if (pad_width) {
- memset(dst_frame, 0, pad_width / 2);
- dst_frame += pad_width / 2;
- }
- src_frame += crop_width >> 1; // in case we have a cut
- memcpy(dst_frame,src_frame ,width);
- src_frame += crop_width >> 1;
- dst_frame += width;
- src_frame += width;
- if (pad_width) {
- memset(dst_frame, 0, pad_width / 2);
- dst_frame += pad_width / 2;
- }
- }
- src_frame += src_width * (diff_height >> 1); // skip end I
- src_frame += (src_width >> 2) * (diff_height >> 1); // skip top of Cr
- for (i = 0; i < (dst_height >> 1); i++) {
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- src_frame += crop_width >> 2; // in case we have a cut
- memcpy(dst_frame, src_frame,width >> 1);
- src_frame += crop_width >> 2;
- dst_frame += width >> 1;
- src_frame += width >> 1;
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- }
- src_frame += (src_width >> 2) * (diff_height >> 1); // skip end of Cr
- src_frame += (src_width >> 2) * (diff_height >> 1); // skip top of Cb
- for (i = 0; i < (dst_height >> 1); i++) {
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- src_frame += crop_width >> 2; // in case we have a cut
- memcpy(dst_frame, src_frame, width >> 1);
- src_frame += crop_width >> 2;
- dst_frame += width >> 1;
- src_frame += width >> 1;
- if (pad_width) {
- memset(dst_frame, 127, pad_width >> 2);
- dst_frame += pad_width >> 2;
- }
- }
- }
- }
- return 0;
-}
-
-} // namespace libyuv
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