mirror of
https://git.sr.ht/~martijnbraam/megapixels
synced 2023-12-14 05:32:55 +01:00
Rework quickpreview to support rotation, mirroring and a colormatrix
This commit is contained in:
Benjamin Schaaf
parent
d2f72a9150
commit
e26d0ddd4b
3 changed files with 482 additions and 130 deletions
463
quickpreview.c
463
quickpreview.c
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@ -3,8 +3,9 @@
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* pixels and doesn't interpolate any values at all
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*/
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#include <linux/videodev2.h>
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#include "quickpreview.h"
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#include <assert.h>
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#include <stdio.h>
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/* Linear -> sRGB lookup table */
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static const int srgb[] = {
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@ -28,138 +29,350 @@ static const int srgb[] = {
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250, 250, 251, 251, 251, 252, 252, 253, 253, 254, 254, 255
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};
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static void quick_debayer_set_dst(uint8_t *dst, uint8_t p0, uint8_t p1,
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uint8_t p2)
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static inline uint32_t pack_rgb(uint8_t r, uint8_t g, uint8_t b)
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{
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dst[0] = p0;
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dst[1] = p1;
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dst[2] = p2;
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return (r << 16) | (g << 8) | b;
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}
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void quick_debayer(const uint8_t *source, uint8_t *destination,
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uint32_t pix_fmt, int width, int height, int skip,
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int blacklevel)
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static inline uint32_t convert_yuv_to_srgb(uint8_t y, uint8_t u, uint8_t v)
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{
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int fragmentsize = 4;
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int byteskip = fragmentsize * skip;
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int input_size = width * height;
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int i = 0, j = 0;
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int row_left = width;
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switch (pix_fmt) {
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case V4L2_PIX_FMT_SBGGR8:
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case V4L2_PIX_FMT_SGBRG8:
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case V4L2_PIX_FMT_SGRBG8:
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case V4L2_PIX_FMT_SRGGB8:
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break;
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case V4L2_PIX_FMT_SBGGR10P:
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case V4L2_PIX_FMT_SGBRG10P:
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case V4L2_PIX_FMT_SGRBG10P:
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case V4L2_PIX_FMT_SRGGB10P:
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fragmentsize = 4;
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byteskip = fragmentsize * skip;
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break;
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uint32_t r = 1.164f * y + 1.596f * (v - 128);
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uint32_t g = 1.164f * y - 0.813f * (v - 128) - 0.391f * (u - 128);
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uint32_t b = 1.164f * y + 2.018f * (u - 128);
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return pack_rgb(r, g, b);
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}
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static inline uint32_t apply_colormatrix(uint32_t color, const float *colormatrix)
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{
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if (!colormatrix) {
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return color;
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}
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do {
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uint8_t b0 = srgb[source[i] - blacklevel];
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uint8_t b1 = srgb[source[i + 1] - blacklevel];
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uint8_t b2 = srgb[source[i + width + 1] - blacklevel];
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uint8_t b3 = srgb[source[i + 2] - blacklevel];
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uint8_t b4 = srgb[source[i + 3] - blacklevel];
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uint8_t b5 = srgb[source[i + width + 2] - blacklevel];
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switch (pix_fmt) {
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case V4L2_PIX_FMT_SBGGR8:
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case V4L2_PIX_FMT_SBGGR10P:
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quick_debayer_set_dst(&destination[j],
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b2, b1, b0);
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j += 3;
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quick_debayer_set_dst(&destination[j],
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b5, b4, b3);
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break;
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case V4L2_PIX_FMT_SGBRG8:
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case V4L2_PIX_FMT_SGBRG10P:
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quick_debayer_set_dst(&destination[j],
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b1, b2, b0);
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j += 3;
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quick_debayer_set_dst(&destination[j],
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b4, b4, b3);
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break;
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case V4L2_PIX_FMT_SGRBG8:
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case V4L2_PIX_FMT_SGRBG10P:
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quick_debayer_set_dst(&destination[j],
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b1, b0, b2);
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j += 3;
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quick_debayer_set_dst(&destination[j],
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b4, b3, b5);
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break;
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case V4L2_PIX_FMT_SRGGB8:
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case V4L2_PIX_FMT_SRGGB10P:
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/* fall through */
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default:
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quick_debayer_set_dst(&destination[j],
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b0, b1, b2);
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j += 3;
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quick_debayer_set_dst(&destination[j],
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b3, b4, b5);
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break;
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}
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j += 3;
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i = i + byteskip;
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row_left = row_left - byteskip;
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if(row_left < byteskip){
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i = i + row_left;
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row_left = width;
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i = i + width;
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i = i + (width * 2 * (skip-1));
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}
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} while (i < input_size);
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uint32_t r = (color >> 16) * colormatrix[0] + ((color >> 8) & 0xFF) * colormatrix[1] + (color & 0xFF) * colormatrix[2];
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uint32_t g = (color >> 16) * colormatrix[3] + ((color >> 8) & 0xFF) * colormatrix[4] + (color & 0xFF) * colormatrix[5];
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uint32_t b = (color >> 16) * colormatrix[6] + ((color >> 8) & 0xFF) * colormatrix[7] + (color & 0xFF) * colormatrix[8];
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return pack_rgb(r, g, b);
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}
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// YUV 4:2:2 to RGB conversion
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void quick_yuv2rgb(const uint8_t *source, uint8_t *destination,
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uint32_t pix_fmt, int width, int height, int skip)
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static inline uint32_t coord_map(uint32_t x, uint32_t y, uint32_t width, uint32_t height, int rotation, bool mirrored)
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{
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int stride = width * 2;
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int pixelsize = 4;
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int input_size = width * 2 * height;
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int i = 0, j = 0;
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int row_left = stride;
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uint8_t Y1, Y2, U, V;
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do {
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switch (pix_fmt) {
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case V4L2_PIX_FMT_UYVY:
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Y1 = source[i+1];
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Y2 = source[i+3];
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U = source[i];
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V = source[i+2];
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break;
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case V4L2_PIX_FMT_YUYV:
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Y1 = source[i];
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Y2 = source[i+2];
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U = source[i+1];
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V = source[i+3];
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break;
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}
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destination[j] = 1.164f * Y1 + 1.596f * (V - 128);
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destination[j+1] = 1.164f * Y1 - 0.813f * (V - 128) - 0.391f * (U - 128);
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destination[j+2] = 1.164f * Y1 + 2.018f * (U - 128);
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j += 3;
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destination[j] = 1.164f * Y2 + 1.596f * (V - 128);
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destination[j+1] = 1.164f * Y2 - 0.813f * (V - 128) - 0.391f * (U - 128);
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destination[j+2] = 1.164f * Y2 + 2.018f * (U - 128);
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j += 3;
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uint32_t x_r, y_r;
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if (rotation == 0) {
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x_r = x;
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y_r = y;
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} else if (rotation == 90) {
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x_r = y;
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y_r = height - x - 1;
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} else if (rotation == 270) {
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x_r = width - y - 1;
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y_r = x;
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} else {
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x_r = width - x - 1;
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y_r = height - y - 1;
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}
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i += pixelsize * skip * 2;
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row_left -= (pixelsize * skip * 2);
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if(row_left < (pixelsize * skip * 2)){
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i = i + row_left;
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row_left = width;
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i = i + (stride * skip);
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}
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} while (i < input_size);
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if (mirrored) {
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x_r = width - x_r - 1;
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}
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uint32_t index = y_r * width + x_r;
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#ifdef DEBUG
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assert(index < width * height);
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#endif
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return index;
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}
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static void quick_preview_rggb8(
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uint32_t *dst,
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const uint32_t dst_width,
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const uint32_t dst_height,
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const uint8_t *src,
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const uint32_t src_width,
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const uint32_t src_height,
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const MPPixelFormat format,
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const uint32_t rotation,
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const bool mirrored,
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const float *colormatrix,
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const uint8_t blacklevel,
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const uint32_t skip)
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{
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uint32_t src_y = 0, dst_y = 0;
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while (src_y < src_height) {
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uint32_t src_x = 0, dst_x = 0;
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while (src_x < src_width) {
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uint32_t src_i = src_y * src_width + src_x;
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uint8_t b0 = srgb[src[src_i] - blacklevel];
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uint8_t b1 = srgb[src[src_i + 1] - blacklevel];
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uint8_t b2 = srgb[src[src_i + src_width + 1] - blacklevel];
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uint32_t color;
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switch (format) {
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case MP_PIXEL_FMT_BGGR8:
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color = pack_rgb(b2, b1, b0);
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break;
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case MP_PIXEL_FMT_GBRG8:
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color = pack_rgb(b2, b0, b1);
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break;
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case MP_PIXEL_FMT_GRBG8:
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color = pack_rgb(b1, b0, b2);
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break;
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case MP_PIXEL_FMT_RGGB8:
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color = pack_rgb(b0, b1, b2);
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break;
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default:
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assert(false);
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}
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color = apply_colormatrix(color, colormatrix);
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// printf("?? %d:%d\n", dst_x, dst_y);
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dst[coord_map(dst_x, dst_y, dst_width, dst_height, rotation, mirrored)] = color;
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src_x += 2 + 2 * skip;
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++dst_x;
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}
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src_y += 2 + 2 * skip;
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++dst_y;
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}
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}
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static void quick_preview_rggb10(
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uint32_t *dst,
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const uint32_t dst_width,
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const uint32_t dst_height,
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const uint8_t *src,
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const uint32_t src_width,
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const uint32_t src_height,
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const MPPixelFormat format,
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const uint32_t rotation,
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const bool mirrored,
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const float *colormatrix,
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const uint8_t blacklevel,
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const uint32_t skip)
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{
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assert(src_width % 2 == 0);
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uint32_t width_bytes = mp_pixel_format_width_to_bytes(format, src_width);
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uint32_t src_y = 0, dst_y = 0;
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while (src_y < src_height) {
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uint32_t src_x = 0, dst_x = 0;
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while (src_x < width_bytes) {
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uint32_t src_i = src_y * width_bytes + src_x;
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uint8_t b0 = srgb[src[src_i] - blacklevel];
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uint8_t b1 = srgb[src[src_i + 1] - blacklevel];
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uint8_t b2 = srgb[src[src_i + width_bytes + 1] - blacklevel];
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uint32_t color;
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switch (format) {
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case MP_PIXEL_FMT_BGGR10P:
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color = pack_rgb(b2, b1, b0);
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break;
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case MP_PIXEL_FMT_GBRG10P:
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color = pack_rgb(b2, b0, b1);
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break;
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case MP_PIXEL_FMT_GRBG10P:
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color = pack_rgb(b1, b0, b2);
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break;
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case MP_PIXEL_FMT_RGGB10P:
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color = pack_rgb(b0, b1, b2);
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break;
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default:
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assert(false);
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}
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color = apply_colormatrix(color, colormatrix);
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dst[coord_map(dst_x, dst_y, dst_width, dst_height, rotation, mirrored)] = color;
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uint32_t advance = 1 + skip;
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if (src_x % 5 == 0) {
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src_x += 2 * (advance % 2) + 5 * (advance / 2);
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} else {
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src_x += 3 * (advance % 2) + 5 * (advance / 2);
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}
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++dst_x;
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}
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src_y += 2 + 2 * skip;
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++dst_y;
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}
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}
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static void quick_preview_yuv(
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uint32_t *dst,
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const uint32_t dst_width,
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const uint32_t dst_height,
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const uint8_t *src,
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const uint32_t src_width,
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const uint32_t src_height,
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const MPPixelFormat format,
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const uint32_t rotation,
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const bool mirrored,
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const float *colormatrix,
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const uint32_t skip)
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{
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assert(src_width % 2 == 0);
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uint32_t width_bytes = src_width * 2;
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uint32_t src_y = 0, dst_y = 0;
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while (src_y < src_height) {
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uint32_t src_x = 0, dst_x = 0;
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while (src_x < width_bytes) {
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uint32_t src_i = src_y * width_bytes + src_x;
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uint8_t b0 = src[src_i];
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uint8_t b1 = src[src_i + 1];
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uint8_t b2 = src[src_i + 2];
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uint8_t b3 = src[src_i + 3];
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uint32_t color1, color2;
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switch (format) {
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case MP_PIXEL_FMT_UYVY:
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color1 = convert_yuv_to_srgb(b1, b0, b2);
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color2 = convert_yuv_to_srgb(b3, b0, b2);
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break;
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case MP_PIXEL_FMT_YUYV:
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color1 = convert_yuv_to_srgb(b0, b1, b3);
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color2 = convert_yuv_to_srgb(b2, b1, b3);
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break;
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default:
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assert(false);
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}
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color1 = apply_colormatrix(color1, colormatrix);
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color2 = apply_colormatrix(color2, colormatrix);
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uint32_t dst_i1 = coord_map(dst_x, dst_y, dst_width, dst_height, rotation, mirrored);
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dst[dst_i1] = color1;
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++dst_x;
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uint32_t dst_i2 = coord_map(dst_x, dst_y, dst_width, dst_height, rotation, mirrored);
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dst[dst_i2] = color2;
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++dst_x;
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src_x += 4 + 4 * skip;
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}
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src_y += 1 + skip;
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++dst_y;
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}
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}
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void quick_preview(
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uint32_t *dst,
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const uint32_t dst_width,
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const uint32_t dst_height,
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const uint8_t *src,
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const uint32_t src_width,
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const uint32_t src_height,
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const MPPixelFormat format,
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const uint32_t rotation,
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const bool mirrored,
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const float *colormatrix,
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const uint8_t blacklevel,
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const uint32_t skip)
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{
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switch (format) {
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case MP_PIXEL_FMT_BGGR8:
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case MP_PIXEL_FMT_GBRG8:
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case MP_PIXEL_FMT_GRBG8:
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case MP_PIXEL_FMT_RGGB8:
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quick_preview_rggb8(
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dst,
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dst_width,
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dst_height,
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src,
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src_width,
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src_height,
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format,
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rotation,
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mirrored,
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colormatrix,
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blacklevel,
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skip);
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break;
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case MP_PIXEL_FMT_BGGR10P:
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case MP_PIXEL_FMT_GBRG10P:
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case MP_PIXEL_FMT_GRBG10P:
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case MP_PIXEL_FMT_RGGB10P:
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quick_preview_rggb10(
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dst,
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dst_width,
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dst_height,
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src,
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src_width,
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src_height,
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format,
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rotation,
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mirrored,
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colormatrix,
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blacklevel,
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skip);
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break;
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case MP_PIXEL_FMT_UYVY:
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case MP_PIXEL_FMT_YUYV:
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quick_preview_yuv(
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dst,
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dst_width,
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dst_height,
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src,
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src_width,
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src_height,
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format,
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rotation,
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mirrored,
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colormatrix,
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skip);
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break;
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default:
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assert(false);
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}
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}
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static uint32_t div_ceil(uint32_t x, uint32_t y)
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{
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return x/y + !!(x % y);
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}
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void quick_preview_size(
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uint32_t *dst_width,
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uint32_t *dst_height,
|
||||
uint32_t *skip,
|
||||
const uint32_t preview_width,
|
||||
const uint32_t preview_height,
|
||||
const uint32_t src_width,
|
||||
const uint32_t src_height,
|
||||
const MPPixelFormat format,
|
||||
const int rotation)
|
||||
{
|
||||
uint32_t colors_x = mp_pixel_format_width_to_colors(format, src_width);
|
||||
uint32_t colors_y = mp_pixel_format_height_to_colors(format, src_height);
|
||||
|
||||
if (rotation != 0 && rotation != 180) {
|
||||
uint32_t tmp = colors_x;
|
||||
colors_x = colors_y;
|
||||
colors_y = tmp;
|
||||
}
|
||||
|
||||
uint32_t scale_x = colors_x / preview_width;
|
||||
uint32_t scale_y = colors_y / preview_height;
|
||||
|
||||
if (scale_x > 0)
|
||||
--scale_x;
|
||||
if (scale_y > 0)
|
||||
--scale_y;
|
||||
*skip = scale_x > scale_y ? scale_x : scale_y;
|
||||
|
||||
*dst_width = div_ceil(colors_x, (1 + *skip));
|
||||
if (*dst_width <= 0)
|
||||
*dst_width = 1;
|
||||
|
||||
*dst_height = div_ceil(colors_y, (1 + *skip));
|
||||
if (*dst_height <= 0)
|
||||
*dst_height = 1;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,8 +1,27 @@
|
|||
#include "camera.h"
|
||||
#include <stdint.h>
|
||||
|
||||
void quick_debayer(const uint8_t *source, uint8_t *destination,
|
||||
uint32_t pix_fmt, int width, int height, int skip,
|
||||
int blacklevel);
|
||||
void quick_preview(
|
||||
uint32_t *dst,
|
||||
const uint32_t dst_width,
|
||||
const uint32_t dst_height,
|
||||
const uint8_t *src,
|
||||
const uint32_t src_width,
|
||||
const uint32_t src_height,
|
||||
const MPPixelFormat format,
|
||||
const uint32_t rotation,
|
||||
const bool mirrored,
|
||||
const float *colormatrix,
|
||||
const uint8_t blacklevel,
|
||||
const uint32_t skip);
|
||||
|
||||
void quick_yuv2rgb(const uint8_t *source, uint8_t *destination,
|
||||
uint32_t pix_fmt, int width, int height, int skip);
|
||||
void quick_preview_size(
|
||||
uint32_t *dst_width,
|
||||
uint32_t *dst_height,
|
||||
uint32_t *skip,
|
||||
const uint32_t preview_width,
|
||||
const uint32_t preview_height,
|
||||
const uint32_t src_width,
|
||||
const uint32_t src_height,
|
||||
const MPPixelFormat format,
|
||||
const int rotation);
|
||||
|
|
|
|||
120
tests/test_quickpreview.c
Normal file
120
tests/test_quickpreview.c
Normal file
|
|
@ -0,0 +1,120 @@
|
|||
#include "quickpreview.h"
|
||||
#include <assert.h>
|
||||
#include <glib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
static void
|
||||
test_quick_preview_fuzz()
|
||||
{
|
||||
for (size_t i = 0; i < 10000; ++i) {
|
||||
uint32_t width = rand() % 127 + 1;
|
||||
uint32_t height = rand() % 127 + 1;
|
||||
uint32_t format = rand() % (MP_PIXEL_FMT_MAX - 1) + 1;
|
||||
|
||||
assert(width > 0 && height > 0);
|
||||
|
||||
switch (format) {
|
||||
case MP_PIXEL_FMT_BGGR8:
|
||||
case MP_PIXEL_FMT_GBRG8:
|
||||
case MP_PIXEL_FMT_GRBG8:
|
||||
case MP_PIXEL_FMT_RGGB8:
|
||||
width += width % 2;
|
||||
height += height % 2;
|
||||
break;
|
||||
case MP_PIXEL_FMT_BGGR10P:
|
||||
case MP_PIXEL_FMT_GBRG10P:
|
||||
case MP_PIXEL_FMT_GRBG10P:
|
||||
case MP_PIXEL_FMT_RGGB10P:
|
||||
width += width % 2;
|
||||
height += height % 2;
|
||||
break;
|
||||
case MP_PIXEL_FMT_UYVY:
|
||||
case MP_PIXEL_FMT_YUYV:
|
||||
width += width % 4;
|
||||
break;
|
||||
default:
|
||||
assert(false);
|
||||
}
|
||||
|
||||
int rotation;
|
||||
switch (rand() % 3) {
|
||||
case 0:
|
||||
rotation = 0;
|
||||
break;
|
||||
case 1:
|
||||
rotation = 90;
|
||||
break;
|
||||
case 2:
|
||||
rotation = 180;
|
||||
break;
|
||||
default:
|
||||
rotation = 270;
|
||||
break;
|
||||
}
|
||||
|
||||
bool mirrored = rand() % 2;
|
||||
|
||||
float matbuf[9];
|
||||
float *colormatrix = NULL;
|
||||
if (rand() % 2) {
|
||||
for (int j = 0; j < 9; ++j) {
|
||||
matbuf[j] = (double)rand() / RAND_MAX * 2.0;
|
||||
}
|
||||
colormatrix = matbuf;
|
||||
}
|
||||
|
||||
uint8_t blacklevel = rand() % 3;
|
||||
|
||||
size_t src_size = mp_pixel_format_width_to_bytes(format, width) * height;
|
||||
uint8_t *src = malloc(src_size);
|
||||
for (int j = 0; j < src_size; ++j) {
|
||||
src[j] = rand();
|
||||
}
|
||||
|
||||
uint32_t preview_width = mp_pixel_format_width_to_colors(format, width);
|
||||
uint32_t preview_height = mp_pixel_format_height_to_colors(format, height);
|
||||
if (preview_width > 32 && preview_height > 32) {
|
||||
preview_width /= (1 + rand() % 2);
|
||||
preview_height /= (1 + rand() % 2);
|
||||
}
|
||||
|
||||
uint32_t dst_width, dst_height, skip;
|
||||
quick_preview_size(
|
||||
&dst_width,
|
||||
&dst_height,
|
||||
&skip,
|
||||
preview_width,
|
||||
preview_height,
|
||||
width,
|
||||
height,
|
||||
format,
|
||||
rotation);
|
||||
|
||||
uint32_t *dst = malloc(dst_width * dst_height * sizeof(uint32_t));
|
||||
|
||||
quick_preview(
|
||||
dst,
|
||||
dst_width,
|
||||
dst_height,
|
||||
src,
|
||||
width,
|
||||
height,
|
||||
format,
|
||||
rotation,
|
||||
mirrored,
|
||||
colormatrix,
|
||||
blacklevel,
|
||||
skip);
|
||||
|
||||
free(dst);
|
||||
free(src);
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
g_test_init(&argc, &argv, NULL);
|
||||
g_test_add_func("/quick_preview/fuzz", test_quick_preview_fuzz);
|
||||
return g_test_run();
|
||||
}
|
||||
Loading…
Reference in a new issue