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/*
* Copyright (C) 2016 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include "FormatConversions.h"
#if PLATFORM_SDK_VERSION < 26
#include <cutils/log.h>
#else
#include <log/log.h>
#endif
#include <string.h>
#define DEBUG 0
#if DEBUG
#define DD(...) ALOGD(__VA_ARGS__)
#else
#define DD(...)
#endif
static int get_rgb_offset(int row, int width, int rgbStride) {
return row * width * rgbStride;
}
void get_yv12_offsets(int width, int height,
uint32_t* yStride_out,
uint32_t* cStride_out,
uint32_t* totalSz_out) {
uint32_t align = 16;
uint32_t yStride = (width + (align - 1)) & ~(align-1);
uint32_t uvStride = (yStride / 2 + (align - 1)) & ~(align-1);
uint32_t uvHeight = height / 2;
uint32_t sz = yStride * height + 2 * (uvHeight * uvStride);
if (yStride_out) *yStride_out = yStride;
if (cStride_out) *cStride_out = uvStride;
if (totalSz_out) *totalSz_out = sz;
}
void get_yuv420p_offsets(int width, int height,
uint32_t* yStride_out,
uint32_t* cStride_out,
uint32_t* totalSz_out) {
uint32_t align = 1;
uint32_t yStride = (width + (align - 1)) & ~(align-1);
uint32_t uvStride = (yStride / 2 + (align - 1)) & ~(align-1);
uint32_t uvHeight = height / 2;
uint32_t sz = yStride * height + 2 * (uvHeight * uvStride);
if (yStride_out) *yStride_out = yStride;
if (cStride_out) *cStride_out = uvStride;
if (totalSz_out) *totalSz_out = sz;
}
signed clamp_rgb(signed value) {
if (value > 255) {
value = 255;
} else if (value < 0) {
value = 0;
}
return value;
}
void rgb565_to_yv12(char* dest, char* src, int width, int height,
int left, int top, int right, int bottom) {
const int rgb_stride = 2;
int align = 16;
int yStride = (width + (align -1)) & ~(align-1);
int cStride = (yStride / 2 + (align - 1)) & ~(align-1);
int yOffset = 0;
int cSize = cStride * height/2;
uint16_t *rgb_ptr0 = (uint16_t *)src;
uint8_t *yv12_y0 = (uint8_t *)dest;
uint8_t *yv12_v0 = yv12_y0 + yStride * height;
for (int j = top; j <= bottom; ++j) {
uint8_t *yv12_y = yv12_y0 + j * yStride;
uint8_t *yv12_v = yv12_v0 + (j/2) * cStride;
uint8_t *yv12_u = yv12_v + cSize;
uint16_t *rgb_ptr = rgb_ptr0 + get_rgb_offset(j, width, rgb_stride);
bool jeven = (j & 1) == 0;
for (int i = left; i <= right; ++i) {
uint8_t r = ((rgb_ptr[i]) >> 11) & 0x01f;
uint8_t g = ((rgb_ptr[i]) >> 5) & 0x03f;
uint8_t b = (rgb_ptr[i]) & 0x01f;
// convert to 8bits
// http://stackoverflow.com/questions/2442576/how-does-one-convert-16-bit-rgb565-to-24-bit-rgb888
uint8_t R = (r * 527 + 23) >> 6;
uint8_t G = (g * 259 + 33) >> 6;
uint8_t B = (b * 527 + 23) >> 6;
// convert to YV12
// frameworks/base/core/jni/android_hardware_camera2_legacy_LegacyCameraDevice.cpp
yv12_y[i] = clamp_rgb((77 * R + 150 * G + 29 * B) >> 8);
bool ieven = (i & 1) == 0;
if (jeven && ieven) {
yv12_u[i] = clamp_rgb((( -43 * R - 85 * G + 128 * B) >> 8) + 128);
yv12_v[i] = clamp_rgb((( 128 * R - 107 * G - 21 * B) >> 8) + 128);
}
}
}
}
void rgb888_to_yv12(char* dest, char* src, int width, int height,
int left, int top, int right, int bottom) {
const int rgb_stride = 3;
DD("%s convert %d by %d", __func__, width, height);
int align = 16;
int yStride = (width + (align -1)) & ~(align-1);
int cStride = (yStride / 2 + (align - 1)) & ~(align-1);
int yOffset = 0;
int cSize = cStride * height/2;
uint8_t *rgb_ptr0 = (uint8_t *)src;
uint8_t *yv12_y0 = (uint8_t *)dest;
uint8_t *yv12_v0 = yv12_y0 + yStride * height;
for (int j = top; j <= bottom; ++j) {
uint8_t *yv12_y = yv12_y0 + j * yStride;
uint8_t *yv12_v = yv12_v0 + (j/2) * cStride;
uint8_t *yv12_u = yv12_v + cSize;
uint8_t *rgb_ptr = rgb_ptr0 + get_rgb_offset(j, width, rgb_stride);
bool jeven = (j & 1) == 0;
for (int i = left; i <= right; ++i) {
uint8_t R = rgb_ptr[i*rgb_stride];
uint8_t G = rgb_ptr[i*rgb_stride+1];
uint8_t B = rgb_ptr[i*rgb_stride+2];
// convert to YV12
// frameworks/base/core/jni/android_hardware_camera2_legacy_LegacyCameraDevice.cpp
yv12_y[i] = clamp_rgb((77 * R + 150 * G + 29 * B) >> 8);
bool ieven = (i & 1) == 0;
if (jeven && ieven) {
yv12_u[i] = clamp_rgb((( -43 * R - 85 * G + 128 * B) >> 8) + 128);
yv12_v[i] = clamp_rgb((( 128 * R - 107 * G - 21 * B) >> 8) + 128);
}
}
}
}
void rgb888_to_yuv420p(char* dest, char* src, int width, int height,
int left, int top, int right, int bottom) {
const int rgb_stride = 3;
DD("%s convert %d by %d", __func__, width, height);
int yStride = width;
int cStride = yStride / 2;
int yOffset = 0;
int cSize = cStride * height/2;
uint8_t *rgb_ptr0 = (uint8_t *)src;
uint8_t *yv12_y0 = (uint8_t *)dest;
uint8_t *yv12_u0 = yv12_y0 + yStride * height;
for (int j = top; j <= bottom; ++j) {
uint8_t *yv12_y = yv12_y0 + j * yStride;
uint8_t *yv12_u = yv12_u0 + (j/2) * cStride;
uint8_t *yv12_v = yv12_u + cSize;
uint8_t *rgb_ptr = rgb_ptr0 + get_rgb_offset(j, width, rgb_stride);
bool jeven = (j & 1) == 0;
for (int i = left; i <= right; ++i) {
uint8_t R = rgb_ptr[i*rgb_stride];
uint8_t G = rgb_ptr[i*rgb_stride+1];
uint8_t B = rgb_ptr[i*rgb_stride+2];
// convert to YV12
// frameworks/base/core/jni/android_hardware_camera2_legacy_LegacyCameraDevice.cpp
yv12_y[i] = clamp_rgb((77 * R + 150 * G + 29 * B) >> 8);
bool ieven = (i & 1) == 0;
if (jeven && ieven) {
yv12_u[i] = clamp_rgb((( -43 * R - 85 * G + 128 * B) >> 8) + 128);
yv12_v[i] = clamp_rgb((( 128 * R - 107 * G - 21 * B) >> 8) + 128);
}
}
}
}
// YV12 is aka YUV420Planar, or YUV420p; the only difference is that YV12 has
// certain stride requirements for Y and UV respectively.
void yv12_to_rgb565(char* dest, char* src, int width, int height,
int left, int top, int right, int bottom) {
const int rgb_stride = 2;
DD("%s convert %d by %d", __func__, width, height);
int align = 16;
int yStride = (width + (align -1)) & ~(align-1);
int cStride = (yStride / 2 + (align - 1)) & ~(align-1);
int yOffset = 0;
int cSize = cStride * height/2;
uint16_t *rgb_ptr0 = (uint16_t *)dest;
uint8_t *yv12_y0 = (uint8_t *)src;
uint8_t *yv12_v0 = yv12_y0 + yStride * height;
for (int j = top; j <= bottom; ++j) {
uint8_t *yv12_y = yv12_y0 + j * yStride;
uint8_t *yv12_v = yv12_v0 + (j/2) * cStride;
uint8_t *yv12_u = yv12_v + cSize;
uint16_t *rgb_ptr = rgb_ptr0 + get_rgb_offset(j, width, rgb_stride);
for (int i = left; i <= right; ++i) {
// convert to rgb
// frameworks/av/media/libstagefright/colorconversion/ColorConverter.cpp
signed y1 = (signed)yv12_y[i] - 16;
signed u = (signed)yv12_u[i / 2] - 128;
signed v = (signed)yv12_v[i / 2] - 128;
signed u_b = u * 517;
signed u_g = -u * 100;
signed v_g = -v * 208;
signed v_r = v * 409;
signed tmp1 = y1 * 298;
signed b1 = clamp_rgb((tmp1 + u_b) / 256);
signed g1 = clamp_rgb((tmp1 + v_g + u_g) / 256);
signed r1 = clamp_rgb((tmp1 + v_r) / 256);
uint16_t rgb1 = ((r1 >> 3) << 11) | ((g1 >> 2) << 5) | (b1 >> 3);
rgb_ptr[i-left] = rgb1;
}
}
}
// YV12 is aka YUV420Planar, or YUV420p; the only difference is that YV12 has
// certain stride requirements for Y and UV respectively.
void yv12_to_rgb888(char* dest, char* src, int width, int height,
int left, int top, int right, int bottom) {
const int rgb_stride = 3;
DD("%s convert %d by %d", __func__, width, height);
int align = 16;
int yStride = (width + (align -1)) & ~(align-1);
int cStride = (yStride / 2 + (align - 1)) & ~(align-1);
int yOffset = 0;
int cSize = cStride * height/2;
uint8_t *rgb_ptr0 = (uint8_t *)dest;
uint8_t *yv12_y0 = (uint8_t *)src;
uint8_t *yv12_v0 = yv12_y0 + yStride * height;
for (int j = top; j <= bottom; ++j) {
uint8_t *yv12_y = yv12_y0 + j * yStride;
uint8_t *yv12_v = yv12_v0 + (j/2) * cStride;
uint8_t *yv12_u = yv12_v + cSize;
uint8_t *rgb_ptr = rgb_ptr0 + get_rgb_offset(j - top, right - left + 1, rgb_stride);
for (int i = left; i <= right; ++i) {
// convert to rgb
// frameworks/av/media/libstagefright/colorconversion/ColorConverter.cpp
signed y1 = (signed)yv12_y[i] - 16;
signed u = (signed)yv12_u[i / 2] - 128;
signed v = (signed)yv12_v[i / 2] - 128;
signed u_b = u * 517;
signed u_g = -u * 100;
signed v_g = -v * 208;
signed v_r = v * 409;
signed tmp1 = y1 * 298;
signed b1 = clamp_rgb((tmp1 + u_b) / 256);
signed g1 = clamp_rgb((tmp1 + v_g + u_g) / 256);
signed r1 = clamp_rgb((tmp1 + v_r) / 256);
rgb_ptr[(i-left)*rgb_stride] = r1;
rgb_ptr[(i-left)*rgb_stride+1] = g1;
rgb_ptr[(i-left)*rgb_stride+2] = b1;
}
}
}
// YV12 is aka YUV420Planar, or YUV420p; the only difference is that YV12 has
// certain stride requirements for Y and UV respectively.
void yuv420p_to_rgb888(char* dest, char* src, int width, int height,
int left, int top, int right, int bottom) {
const int rgb_stride = 3;
DD("%s convert %d by %d", __func__, width, height);
int yStride = width;
int cStride = yStride / 2;
int yOffset = 0;
int cSize = cStride * height/2;
uint8_t *rgb_ptr0 = (uint8_t *)dest;
uint8_t *yv12_y0 = (uint8_t *)src;
uint8_t *yv12_u0 = yv12_y0 + yStride * height;
for (int j = top; j <= bottom; ++j) {
uint8_t *yv12_y = yv12_y0 + j * yStride;
uint8_t *yv12_u = yv12_u0 + (j/2) * cStride;
uint8_t *yv12_v = yv12_u + cSize;
uint8_t *rgb_ptr = rgb_ptr0 + get_rgb_offset(j - top, right - left + 1, rgb_stride);
for (int i = left; i <= right; ++i) {
// convert to rgb
// frameworks/av/media/libstagefright/colorconversion/ColorConverter.cpp
signed y1 = (signed)yv12_y[i] - 16;
signed u = (signed)yv12_u[i / 2] - 128;
signed v = (signed)yv12_v[i / 2] - 128;
signed u_b = u * 517;
signed u_g = -u * 100;
signed v_g = -v * 208;
signed v_r = v * 409;
signed tmp1 = y1 * 298;
signed b1 = clamp_rgb((tmp1 + u_b) / 256);
signed g1 = clamp_rgb((tmp1 + v_g + u_g) / 256);
signed r1 = clamp_rgb((tmp1 + v_r) / 256);
rgb_ptr[(i-left)*rgb_stride] = r1;
rgb_ptr[(i-left)*rgb_stride+1] = g1;
rgb_ptr[(i-left)*rgb_stride+2] = b1;
}
}
}
void copy_rgb_buffer_from_unlocked(
char* _dst, char* raw_data,
int unlockedWidth,
int width, int height, int top, int left,
int bpp) {
char* dst = _dst;
int dst_line_len = width * bpp;
int src_line_len = unlockedWidth * bpp;
char *src = (char *)raw_data + top*src_line_len + left*bpp;
for (int y = 0; y < height; y++) {
memcpy(dst, src, dst_line_len);
src += src_line_len;
dst += dst_line_len;
}
}
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