mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 01:00:37 +00:00
bayer2rgb: Rewrite signal processing. Much faster.
This commit is contained in:
David Schleef
parent
03bb5dc8ba
commit
f0c75b06a7
1 changed files with 262 additions and 265 deletions
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@ -382,283 +382,281 @@ gst_bayer2rgb_get_unit_size (GstBaseTransform * base, GstCaps * caps,
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return FALSE;
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}
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/*
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* We define values for the colors, just to make the code more readable.
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*/
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#define RED 0 /* Pure red element */
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#define GREENB 1 /* Green element which is on a blue line */
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#define BLUE 2 /* Pure blue element */
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#define GREENR 3 /* Green element which is on a red line */
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#define RECONSTRUCT_SQUARE(x) \
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do { \
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int _h1 = next[i-1]; \
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int _h2 = prev[i+1]; \
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int _v1 = next[i+1]; \
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int _v2 = prev[i-1]; \
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(x) = (_h1+_h2+_v1+_v2+2)>>2; \
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} while (0)
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static int
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get_pixel_type (GstBayer2RGB * filter, int x, int y)
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#define RECONSTRUCT_DIAMOND(x) \
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do { \
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int _h1 = src[i-1]; \
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int _h2 = src[i+1]; \
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int _v1 = next[i]; \
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int _v2 = prev[i]; \
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(x) = (_h1+_h2+_v1+_v2+2)>>2; \
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} while (0)
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#define RECONSTRUCT_HORIZ(x) \
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do { \
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(x) = (src[i-1] + src[i+1] + 1) >> 1; \
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} while (0)
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#define RECONSTRUCT_VERT(x) \
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do { \
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(x) = (next[i] + prev[i] + 1) >> 1; \
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} while (0)
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static void
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reconstruct_blue_green (GstBayer2RGB * bayer2rgb, uint8_t * dest,
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uint8_t * src, int src_stride, int blue_loc)
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{
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int type;
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int i;
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int r, g, b;
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uint8_t *prev;
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uint8_t *next;
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int width = bayer2rgb->width;
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if (((x ^ filter->format) & 1)) {
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if ((y ^ (filter->format >> 1)) & 1)
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type = RED;
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else
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type = GREENB;
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prev = src - src_stride;
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next = src + src_stride;
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i = 0;
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if ((i & 1) == blue_loc) {
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b = src[i];
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r = (next[i + 1] + prev[i + 1] + 1) >> 1;
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g = (next[i] + prev[i] + 1) >> 1;
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} else {
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if ((y ^ (filter->format >> 1)) & 1)
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type = GREENR;
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else
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type = BLUE;
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b = src[i + 1];
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r = (next[i] + prev[i] + 1) >> 1;
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g = src[i];
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}
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return type;
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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for (i = 1; i < width - 1; i++) {
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if ((i & 1) == blue_loc) {
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b = src[i];
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RECONSTRUCT_SQUARE (r);
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RECONSTRUCT_DIAMOND (g);
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} else {
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RECONSTRUCT_HORIZ (b);
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RECONSTRUCT_VERT (r);
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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if ((i & 1) == blue_loc) {
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b = src[i];
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r = (next[i - 1] + prev[i - 1] + 1) >> 1;
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g = (next[i] + prev[i] + 1) >> 1;
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} else {
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b = src[i - 1];
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r = (next[i] + prev[i] + 1) >> 1;
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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/* Routine to generate the top and bottom edges (not including corners) */
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static void
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hborder (uint8_t * input, uint8_t * output, int bot_top,
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int typ, GstBayer2RGB * filter)
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reconstruct_green_red (GstBayer2RGB * bayer2rgb, uint8_t * dest,
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uint8_t * src, int src_stride, int red_loc)
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{
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uint8_t *op; /* output pointer */
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uint8_t *ip; /* input pointer */
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uint8_t *nx; /* next line pointer */
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int ix; /* loop index */
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int i;
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int r, g, b;
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uint8_t *prev;
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uint8_t *next;
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int width = bayer2rgb->width;
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op = output + (bot_top * filter->width * (filter->height - 1) + 1) *
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filter->pixsize;
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ip = input + bot_top * filter->stride * (filter->height - 1);
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/* calculate minus or plus one line, depending upon bot_top flag */
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nx = ip + (1 - 2 * bot_top) * filter->stride;
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/* Stepping horizontally */
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for (ix = 1; ix < filter->width - 1; ix++, op += filter->pixsize) {
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switch (typ) {
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case RED:
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op[filter->r_off] = ip[ix];
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op[filter->g_off] = (ip[ix + 1] + ip[ix - 1] + nx[ix] + 1) / 3;
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op[filter->b_off] = (nx[ix + 1] + nx[ix - 1] + 1) / 2;
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typ = GREENR;
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break;
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case GREENR:
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op[filter->r_off] = (ip[ix + 1] + ip[ix - 1] + 1) / 2;
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op[filter->g_off] = ip[ix];
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op[filter->b_off] = nx[ix];
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typ = RED;
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break;
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case GREENB:
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op[filter->r_off] = nx[ix];
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op[filter->g_off] = ip[ix];
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op[filter->b_off] = (ip[ix + 1] + ip[ix - 1] + 1) / 2;
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typ = BLUE;
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break;
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case BLUE:
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op[filter->r_off] = (nx[ix + 1] + nx[ix - 1] + 1) / 2;
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op[filter->g_off] = (ip[ix + 1] + ip[ix - 1] + nx[ix] + 1) / 3;
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op[filter->b_off] = ip[ix];
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typ = GREENB;
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break;
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prev = src - src_stride;
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next = src + src_stride;
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i = 0;
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if ((i & 1) == red_loc) {
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r = src[i];
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b = (next[i + 1] + prev[i + 1] + 1) >> 1;
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g = (next[i] + prev[i] + 1) >> 1;
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} else {
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r = src[i + 1];
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b = (next[i] + prev[i] + 1) >> 1;
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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for (i = 1; i < width - 1; i++) {
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if ((i & 1) == red_loc) {
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r = src[i];
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RECONSTRUCT_SQUARE (b);
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RECONSTRUCT_DIAMOND (g);
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} else {
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RECONSTRUCT_HORIZ (r);
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RECONSTRUCT_VERT (b);
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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if ((i & 1) == red_loc) {
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r = src[i];
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b = (next[i - 1] + prev[i - 1] + 1) >> 1;
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g = (next[i] + prev[i] + 1) >> 1;
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} else {
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r = src[i - 1];
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b = (next[i] + prev[i] + 1) >> 1;
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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static void
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reconstruct_blue_green_edge (GstBayer2RGB * bayer2rgb, uint8_t * dest,
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uint8_t * src, int src_stride, int blue_loc, int offset)
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{
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int i;
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int r, g, b;
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uint8_t *next;
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int width = bayer2rgb->width;
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next = src + offset * src_stride;
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i = 0;
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if ((i & 1) == blue_loc) {
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b = src[i];
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r = next[i + 1];
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g = next[i];
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} else {
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b = src[i + 1];
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r = next[i];
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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for (i = 1; i < width - 1; i++) {
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if ((i & 1) == blue_loc) {
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b = src[i];
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r = (next[i - 1] + next[i + 1] + 1) >> 1;
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g = (src[i - 1] + src[i + 1] + 1) >> 1;
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} else {
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b = (src[i - 1] + src[i + 1] + 1) >> 1;
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r = next[i];
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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if ((i & 1) == blue_loc) {
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b = src[i];
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r = next[i - 1];
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g = next[i];
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} else {
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b = src[i - 1];
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r = next[i];
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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static void
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reconstruct_green_red_edge (GstBayer2RGB * bayer2rgb, uint8_t * dest,
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uint8_t * src, int src_stride, int red_loc, int offset)
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{
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int i;
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int r, g, b;
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uint8_t *next;
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int width = bayer2rgb->width;
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next = src + offset * src_stride;
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i = 0;
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if ((i & 1) == red_loc) {
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r = src[i];
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b = next[i + 1];
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g = next[i];
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} else {
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r = src[i + 1];
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b = next[i];
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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for (i = 1; i < width - 1; i++) {
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if ((i & 1) == red_loc) {
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r = src[i];
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b = (next[i - 1] + next[i + 1] + 1) >> 1;
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g = (src[i - 1] + src[i + 1] + 1) >> 1;
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} else {
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r = (src[i - 1] + src[i + 1] + 1) >> 1;
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b = next[i];
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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if ((i & 1) == red_loc) {
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r = src[i];
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b = next[i - 1];
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g = next[i];
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} else {
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r = src[i - 1];
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b = next[i];
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g = src[i];
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}
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dest[i * 4 + bayer2rgb->r_off] = r;
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dest[i * 4 + bayer2rgb->g_off] = g;
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dest[i * 4 + bayer2rgb->b_off] = b;
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}
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static void
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gst_bayer2rgb_process_ref (GstBayer2RGB * bayer2rgb, uint8_t * dest,
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int dest_stride, uint8_t * src, int src_stride)
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{
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int j;
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int format = bayer2rgb->format;
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j = 0;
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if ((j & 1) == (format & 2) >> 1) {
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reconstruct_blue_green_edge (bayer2rgb, dest + j * dest_stride,
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src + j * src_stride, src_stride, format & 1, 1);
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} else {
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reconstruct_green_red_edge (bayer2rgb, dest + j * dest_stride,
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src + j * src_stride, src_stride, (format & 1) ^ 1, 1);
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}
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for (j = 1; j < bayer2rgb->height - 1; j++) {
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if ((j & 1) == (format & 2) >> 1) {
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reconstruct_blue_green (bayer2rgb, dest + j * dest_stride,
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src + j * src_stride, src_stride, format & 1);
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} else {
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reconstruct_green_red (bayer2rgb, dest + j * dest_stride,
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src + j * src_stride, src_stride, (format & 1) ^ 1);
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}
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}
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}
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/* Routine to generate the left and right edges, not including corners */
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static void
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vborder (uint8_t * input, uint8_t * output, int right_left,
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int typ, GstBayer2RGB * filter)
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{
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uint8_t *op; /* output pointer */
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uint8_t *ip; /* input pointer */
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uint8_t *la; /* line above pointer */
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uint8_t *lb; /* line below pointer */
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int ix; /* loop index */
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int lr; /* 'left-right' flag - +1 is right, -1 is left */
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lr = (1 - 2 * right_left);
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/* stepping vertically */
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for (ix = 1; ix < filter->height - 1; ix++) {
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ip = input + right_left * (filter->width - 1) + ix * filter->stride;
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op = output + (right_left * (filter->width - 1) + ix * filter->width) *
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filter->pixsize;
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la = ip + filter->stride;
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lb = ip - filter->stride;
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switch (typ) {
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case RED:
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op[filter->r_off] = ip[0];
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op[filter->g_off] = (la[0] + ip[lr] + lb[0] + 1) / 3;
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op[filter->b_off] = (la[lr] + lb[lr] + 1) / 2;
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typ = GREENB;
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break;
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case GREENR:
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op[filter->r_off] = ip[lr];
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op[filter->g_off] = ip[0];
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op[filter->b_off] = (la[lr] + lb[lr] + 1) / 2;
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typ = BLUE;
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break;
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case GREENB:
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op[filter->r_off] = (la[lr] + lb[lr] + 1) / 2;
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op[filter->g_off] = ip[0];
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op[filter->b_off] = ip[lr];
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typ = RED;
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break;
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case BLUE:
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op[filter->r_off] = (la[lr] + lb[lr] + 1) / 2;
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op[filter->g_off] = (la[0] + ip[lr] + lb[0] + 1) / 3;
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op[filter->b_off] = ip[0];
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typ = GREENR;
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break;
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}
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if ((j & 1) == (format & 2) >> 1) {
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reconstruct_blue_green_edge (bayer2rgb, dest + j * dest_stride,
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src + j * src_stride, src_stride, format & 1, -1);
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} else {
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reconstruct_green_red_edge (bayer2rgb, dest + j * dest_stride,
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src + j * src_stride, src_stride, (format & 1) ^ 1, -1);
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}
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}
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/* Produce the four (top, bottom, left, right) edges */
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static void
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do_row0_col0 (uint8_t * input, uint8_t * output, GstBayer2RGB * filter)
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{
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/* Horizontal edges */
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hborder (input, output, 0, get_pixel_type (filter, 1, 0), filter);
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hborder (input, output, 1, get_pixel_type (filter, 1, filter->height - 1),
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filter);
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/* Vertical edges */
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vborder (input, output, 0, get_pixel_type (filter, 0, 1), filter);
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vborder (input, output, 1, get_pixel_type (filter, filter->width - 1, 1),
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filter);
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}
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static void
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corner (uint8_t * input, uint8_t * output, int x, int y,
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int xd, int yd, int typ, GstBayer2RGB * filter)
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{
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uint8_t *ip; /* input pointer */
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uint8_t *op; /* output pointer */
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uint8_t *nx; /* adjacent line */
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op = output + y * filter->width * filter->pixsize + x * filter->pixsize;
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ip = input + y * filter->stride + x;
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nx = ip + yd * filter->stride;
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switch (typ) {
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case RED:
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op[filter->r_off] = ip[0];
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op[filter->g_off] = (nx[0] + ip[xd] + 1) / 2;
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op[filter->b_off] = nx[xd];
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break;
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case GREENR:
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op[filter->r_off] = ip[xd];
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op[filter->g_off] = ip[0];
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op[filter->b_off] = nx[0];
|
||||
break;
|
||||
case GREENB:
|
||||
op[filter->r_off] = nx[0];
|
||||
op[filter->g_off] = ip[0];
|
||||
op[filter->b_off] = ip[xd];
|
||||
break;
|
||||
case BLUE:
|
||||
op[filter->r_off] = nx[xd];
|
||||
op[filter->g_off] = (nx[0] + ip[xd] + 1) / 2;
|
||||
op[filter->b_off] = ip[0];
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
do_corners (uint8_t * input, uint8_t * output, GstBayer2RGB * filter)
|
||||
{
|
||||
/* Top left */
|
||||
corner (input, output, 0, 0, 1, 1, get_pixel_type (filter, 0, 0), filter);
|
||||
/* Bottom left */
|
||||
corner (input, output, 0, filter->height - 1, 1, -1,
|
||||
get_pixel_type (filter, 0, filter->height - 1), filter);
|
||||
/* Top right */
|
||||
corner (input, output, filter->width - 1, 0, -1, 0,
|
||||
get_pixel_type (filter, filter->width - 1, 0), filter);
|
||||
/* Bottom right */
|
||||
corner (input, output, filter->width - 1, filter->height - 1, -1, -1,
|
||||
get_pixel_type (filter, filter->width - 1, filter->height - 1), filter);
|
||||
}
|
||||
|
||||
static void
|
||||
do_body (uint8_t * input, uint8_t * output, GstBayer2RGB * filter)
|
||||
{
|
||||
int ip, op; /* input and output pointers */
|
||||
int w, h; /* loop indices */
|
||||
int type; /* calculated colour of current element */
|
||||
int a1, a2;
|
||||
int v1, v2, h1, h2;
|
||||
|
||||
/*
|
||||
* We are processing row (line) by row, starting with the second
|
||||
* row and continuing through the next to last. Each row is processed
|
||||
* column by column, starting with the second and continuing through
|
||||
* to the next to last.
|
||||
*/
|
||||
for (h = 1; h < filter->height - 1; h++) {
|
||||
/*
|
||||
* Remember we are processing "row by row". For each row, we need
|
||||
* to set the type of the first element to be processed. Since we
|
||||
* have already processed the edges, the "first element" will be
|
||||
* the pixel at position (1,1). Assuming BG format, this should
|
||||
* be RED for odd-numbered rows and GREENB for even rows.
|
||||
*/
|
||||
type = get_pixel_type (filter, 1, h);
|
||||
/* Calculate the starting position for the row */
|
||||
op = h * filter->width * filter->pixsize; /* output (converted) pos */
|
||||
ip = h * filter->stride; /* input (bayer data) pos */
|
||||
for (w = 1; w < filter->width - 1; w++) {
|
||||
op += filter->pixsize; /* we are processing "horizontally" */
|
||||
ip++;
|
||||
switch (type) {
|
||||
case RED:
|
||||
output[op + filter->r_off] = input[ip];
|
||||
output[op + filter->b_off] = (input[ip - filter->stride - 1] +
|
||||
input[ip - filter->stride + 1] +
|
||||
input[ip + filter->stride - 1] +
|
||||
input[ip + filter->stride + 1] + 2) / 4;
|
||||
v1 = input[ip + filter->stride];
|
||||
v2 = input[ip - filter->stride];
|
||||
h1 = input[ip + 1];
|
||||
h2 = input[ip - 1];
|
||||
a1 = abs (v1 - v2);
|
||||
a2 = abs (h1 - h2);
|
||||
if (a1 < a2)
|
||||
output[op + filter->g_off] = (v1 + v2 + 1) / 2;
|
||||
else if (a1 > a2)
|
||||
output[op + filter->g_off] = (h1 + h2 + 1) / 2;
|
||||
else
|
||||
output[op + filter->g_off] = (v1 + h1 + v2 + h2 + 2) / 4;
|
||||
type = GREENR;
|
||||
break;
|
||||
case GREENR:
|
||||
output[op + filter->r_off] = (input[ip + 1] + input[ip - 1] + 1) / 2;
|
||||
output[op + filter->g_off] = input[ip];
|
||||
output[op + filter->b_off] = (input[ip - filter->stride] +
|
||||
input[ip + filter->stride] + 1) / 2;
|
||||
type = RED;
|
||||
break;
|
||||
case GREENB:
|
||||
output[op + filter->r_off] = (input[ip - filter->stride] +
|
||||
input[ip + filter->stride] + 1) / 2;
|
||||
output[op + filter->g_off] = input[ip];
|
||||
output[op + filter->b_off] = (input[ip + 1] + input[ip - 1] + 1) / 2;
|
||||
type = BLUE;
|
||||
break;
|
||||
case BLUE:
|
||||
output[op + filter->r_off] = (input[ip - filter->stride - 1] +
|
||||
input[ip - filter->stride + 1] +
|
||||
input[ip + filter->stride - 1] +
|
||||
input[ip + filter->stride + 1] + 2) / 4;
|
||||
output[op + filter->b_off] = input[ip];
|
||||
v1 = input[ip + filter->stride];
|
||||
v2 = input[ip - filter->stride];
|
||||
h1 = input[ip + 1];
|
||||
h2 = input[ip - 1];
|
||||
a1 = abs (v1 - v2);
|
||||
a2 = abs (h1 - h2);
|
||||
if (a1 < a2)
|
||||
output[op + filter->g_off] = (v1 + v2 + 1) / 2;
|
||||
else if (a1 > a2)
|
||||
output[op + filter->g_off] = (h1 + h2 + 1) / 2;
|
||||
else
|
||||
output[op + filter->g_off] = (v1 + h1 + v2 + h2 + 2) / 4;
|
||||
type = GREENB;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static GstFlowReturn
|
||||
gst_bayer2rgb_transform (GstBaseTransform * base, GstBuffer * inbuf,
|
||||
|
|
@ -677,9 +675,8 @@ gst_bayer2rgb_transform (GstBaseTransform * base, GstBuffer * inbuf,
|
|||
GST_DEBUG ("transforming buffer");
|
||||
input = (uint8_t *) GST_BUFFER_DATA (inbuf);
|
||||
output = (uint8_t *) GST_BUFFER_DATA (outbuf);
|
||||
do_corners (input, output, filter);
|
||||
do_row0_col0 (input, output, filter);
|
||||
do_body (input, output, filter);
|
||||
gst_bayer2rgb_process_ref (filter, output, filter->width * 4,
|
||||
input, filter->width);
|
||||
|
||||
GST_OBJECT_UNLOCK (filter);
|
||||
return GST_FLOW_OK;
|
||||
|
|
|
|||
Loading…
Reference in a new issue