static void get_viewport_size()
{
viewport_height = vid_get_viewport_height()-camera_screen.edge_hmargin*2; //don't trace bottom lines
viewport_width = vid_get_viewport_width();
viewport_byte_width = vid_get_viewport_byte_width();
viewport_yscale = vid_get_viewport_yscale();
viewport_xoffset = vid_get_viewport_display_xoffset();
viewport_yoffset = vid_get_viewport_display_yoffset();
slice_height = viewport_height / EDGE_SLICES;
}
void histogram_process()
{
static unsigned char *img;
static int viewport_size, viewport_width, viewport_row_offset;
register int x, i, hi;
int y, v, u, c;
float (*histogram_transform)(float);
unsigned int histo_fill[5];
int histo_main;
long exposition_thresh = camera_screen.size / 500;
// Select transform function
switch (conf.histo_mode)
{
case HISTO_MODE_LOG:
histogram_transform = logarithmic;
break;
case HISTO_MODE_LINEAR:
default:
histogram_transform = identity;
break;
}
// Select which calculated histogram channel determines magnification / scaling
if (conf.histo_layout == OSD_HISTO_LAYOUT_Y || conf.histo_layout == OSD_HISTO_LAYOUT_Y_argb)
histo_main = HISTO_Y;
else
histo_main = HISTO_RGB;
histogram_alloc();
// This function is called in the main spytask loop roughly every 20msec
// To avoid hogging all the CPU it performs it's work in stages controlled by histogram-stage
// Stage Function
// 0 Initialize global variables used in next stages
// 1,2,3 Count number of values for a third of the viewport image at each stage
// 4 Calculate max values, over and under exposure setting
// 5 Calculate the histogram display values
switch (histogram_stage)
{
case 0:
img=vid_get_viewport_active_buffer();
if (!img) return;
img += vid_get_viewport_image_offset(); // offset into viewport for when image size != viewport size (e.g. 16:9 image on 4:3 LCD)
viewport_size = vid_get_viewport_height() * vid_get_viewport_byte_width() * vid_get_viewport_yscale();
viewport_width = vid_get_viewport_width();
viewport_row_offset = vid_get_viewport_row_offset();
for (c=0; c<5; ++c) {
memset(histogram_proc[c],0,256*sizeof(unsigned short));
histo_max[c] = histo_max_center[c] = 0;
}
histogram_stage=1;
break;
case 1:
case 2:
case 3:
x = 0; // count how many blocks we have done on the current row (to skip unused buffer space at end of each row)
for (i=(histogram_stage-1)*6; i<viewport_size; i+=HISTO_STEP_SIZE*6) {
y = img[i+1];
u = *(signed char*)(&img[i]);
//if (u&0x00000080) u|=0xFFFFFF00; // Compiler should handle the unsigned -> signed conversion
v = *(signed char*)(&img[i+2]);
//if (v&0x00000080) v|=0xFFFFFF00; // Compiler should handle the unsigned -> signed conversion
++histogram_proc[HISTO_Y][y]; // Y
hi = clip(((y<<12) + v*5743 + 2048)>>12); // R
++histogram_proc[HISTO_R][hi];
hi = clip(((y<<12) - u*1411 - v*2925 + 2048)>>12); // G
++histogram_proc[HISTO_G][hi];
hi = clip(((y<<12) + u*7258 + 2048)>>12); // B
++histogram_proc[HISTO_B][hi];
// Handle case where viewport memory buffer is wider than the actual buffer.
x += HISTO_STEP_SIZE * 2; // viewport width is measured in blocks of three bytes each even though the data is stored in six byte chunks !
if (x == viewport_width)
{
i += viewport_row_offset;
x = 0;
}
}
++histogram_stage;
break;
case 4:
for (i=0, c=0; i<HISTO_WIDTH; ++i, c+=2) { // G
// Merge each pair of values into a single value (for width = 128)
// Warning: this is optimised for HISTO_WIDTH = 128, don't change the width unless you re-write this code as well.
histogram_proc[HISTO_Y][i] = histogram_proc[HISTO_Y][c] + histogram_proc[HISTO_Y][c+1];
histogram_proc[HISTO_R][i] = histogram_proc[HISTO_R][c] + histogram_proc[HISTO_R][c+1];
histogram_proc[HISTO_G][i] = histogram_proc[HISTO_G][c] + histogram_proc[HISTO_G][c+1];
histogram_proc[HISTO_B][i] = histogram_proc[HISTO_B][c] + histogram_proc[HISTO_B][c+1];
// Calc combined RGB totals
histogram_proc[HISTO_RGB][i] = histogram_proc[HISTO_R][i] + histogram_proc[HISTO_G][i] + histogram_proc[HISTO_B][i];
}
// calculate maximums
for (c=0; c<5; ++c) {
for (i=0; i<HISTO_WIDTH; ++i) {
if (histo_max[c]<histogram_proc[c][i])
histo_max[c]=histogram_proc[c][i];
if (histo_max_center[c]<histogram_proc[c][i] && i>=conf.histo_ignore_boundary && i<HISTO_WIDTH-conf.histo_ignore_boundary)
histo_max_center[c]=histogram_proc[c][i];
}
if (histo_max_center[c] > 0) {
histo_max_center_invw[c] = ((float)HISTO_HEIGHT)/histogram_transform((float)histo_max_center[c]);
} else if (histo_max[c] > 0) {
histo_max_center_invw[c] = ((float)HISTO_HEIGHT)/histogram_transform((float)histo_max[c]);
} else {
histo_max_center_invw[c] = 0.0f;
}
}
if (histo_max[HISTO_RGB] > 0) { // over- / under- expos
under_exposed = (histogram_proc[HISTO_RGB][0]*8
+histogram_proc[HISTO_RGB][1]*4
+histogram_proc[HISTO_RGB][2]) > exposition_thresh;
over_exposed = (histogram_proc[HISTO_RGB][HISTO_WIDTH-3]
+histogram_proc[HISTO_RGB][HISTO_WIDTH-2]*4
+histogram_proc[HISTO_RGB][HISTO_WIDTH-1]*8) > exposition_thresh;
} else {
over_exposed = 0;
under_exposed = 1;
}
histogram_stage=5;
break;
case 5:
for (c=0; c<5; ++c) {
histo_fill[c]=0;
for (i=0; i<HISTO_WIDTH; ++i) {
histogram[c][i] = (histogram_transform((float)histogram_proc[c][i]))*histo_max_center_invw[c];
if (histogram[c][i] > HISTO_HEIGHT)
histogram[c][i] = HISTO_HEIGHT;
histo_fill[c]+=histogram[c][i];
}
}
histo_magnification = 0;
if (conf.histo_auto_ajust) {
if (histo_fill[histo_main] < (HISTO_HEIGHT*HISTO_WIDTH)/5) { // try to ajust if average level is less than 20%
histo_magnification = (20*HISTO_HEIGHT*HISTO_WIDTH) / histo_fill[histo_main];
for (c=0; c<5; ++c) {
for (i=0;i<HISTO_WIDTH;i++) {
histogram[c][i] = histogram[c][i] * histo_magnification / 100;
if (histogram[c][i] > HISTO_HEIGHT)
histogram[c][i] = HISTO_HEIGHT;
}
}
}
}
histogram_stage=0;
break;
}
}
static int md_detect_motion(void)
{
int idx, tick, rv;
int val, cy, cv, cu;
register int col, row, x, y;
if(!md_running())
{
return 0;
}
tick = get_tick_count();
rv = 1;
#ifdef OPT_MD_DEBUG
if(motion_detector.comp_calls_cnt < MD_REC_CALLS_CNT)
{
motion_detector.comp_calls[motion_detector.comp_calls_cnt]=tick;
}
motion_detector.comp_calls_cnt++;
#endif
if(motion_detector.start_time + motion_detector.timeout < tick )
{
md_save_calls_history();
motion_detector.running = 0;
return 0;
}
if(motion_detector.last_measure_time + motion_detector.measure_interval > tick)
{
// wait for the next time
return 1;
}
motion_detector.last_measure_time = tick;
unsigned char* img = vid_get_viewport_live_fb();
if(img==NULL)
{
img = vid_get_viewport_fb();
}
#ifdef OPT_MD_DEBUG
if(motion_detector.comp_calls_cnt==50 && (motion_detector.parameters & MD_MAKE_RAM_DUMP_FILE) != 0 )
{
mx_dump_memory((char*)img);
}
#endif
img += vid_get_viewport_image_offset(); // offset into viewport for when image size != viewport size (e.g. 16:9 image on 4:3 LCD)
int vp_h = vid_get_viewport_height();
int vp_w = vid_get_viewport_width();
int vp_bw = vid_get_viewport_byte_width() * vid_get_viewport_yscale();
int x_step = motion_detector.pixels_step * 3;
int y_step = motion_detector.pixels_step * vp_bw;
for (idx=0, row=0; row < motion_detector.rows; row++)
{
// Calc img y start and end offsets (use same height for all cells so 'points' is consistent)
int y_start = ((row * vp_h) / motion_detector.rows) * vp_bw;
int y_end = y_start + ((vp_h / motion_detector.rows) * vp_bw);
for (col=0; col < motion_detector.columns; col++, idx++)
{
int in_clipping_region=0;
if (col+1 >= motion_detector.clipping_region_column1 &&
col+1 <= motion_detector.clipping_region_column2 &&
row+1 >= motion_detector.clipping_region_row1 &&
row+1 <= motion_detector.clipping_region_row2)
{
in_clipping_region=1;
}
int curr = 0;
int diff = 0;
if (
(motion_detector.clipping_region_mode==MD_REGION_NONE) ||
(motion_detector.clipping_region_mode==MD_REGION_EXCLUDE && in_clipping_region==0) ||
(motion_detector.clipping_region_mode==MD_REGION_INCLUDE && in_clipping_region==1)
)
{
// Calc img x start and end offsets (use same width for all cells so 'points' is consistent)
int x_start = ((col * vp_w) / motion_detector.columns) * 3;
int x_end = x_start + ((vp_w / motion_detector.columns) * 3);
int points = 0;
for (y=y_start; y<y_end; y+=y_step)
{
for (x=x_start; x<x_end; x+=x_step)
{
// ARRAY of UYVYYY values
// 6 bytes - 4 pixels
if (motion_detector.pixel_measure_mode == MD_MEASURE_MODE_Y)
{
val = img[y + x + 1]; //Y
}
else
{
// Calc offset to UYV component
int uvx = x;
if (uvx & 1) uvx -= 3;
switch(motion_detector.pixel_measure_mode)
{
case MD_MEASURE_MODE_U:
val = (signed char)img[y + uvx]; //U
break;
case MD_MEASURE_MODE_V:
val = (signed char)img[y + uvx + 2]; //V
break;
case MD_MEASURE_MODE_R:
cy = img[y + x + 1];
cv = (signed char)img[y + uvx + 2];
val = clip(((cy<<12) + cv*5743 + 2048)>>12); // R
break;
case MD_MEASURE_MODE_G:
cy = img[y + x + 1];
cu = (signed char)img[y + uvx];
cv = (signed char)img[y + uvx + 2];
val = clip(((cy<<12) - cu*1411 - cv*2925 + 2048)>>12); // G
break;
case MD_MEASURE_MODE_B:
cy = img[y + x + 1];
cu = (signed char)img[y + uvx];
val = clip(((cy<<12) + cu*7258 + 2048)>>12); // B
break;
default:
val = 0; // Stop compiler warning
break;
}
}
curr += val;
points++;
}
}
motion_detector.points = points ;
diff = (curr - motion_detector.prev[idx]) / points;
if (diff < 0) diff = -diff;
if ((diff > motion_detector.threshold) &&
(motion_detector.start_time+motion_detector.msecs_before_trigger < tick))
{
motion_detector.detected_cells++;
}
}
motion_detector.diff[idx] = diff;
motion_detector.prev[idx] = curr;
}
}