ofImage& ofxSlitScan::getOutputImage(){
if(outputIsDirty){
//calculate the new distorted image
unsigned char* writebuffer = outputImage.getPixels();
unsigned char* outbuffer = writebuffer;
int x, y, offset, lower_offset, upper_offset, pixelIndex;
float precise, alpha, invalpha;
int mapMin = capacity - timeDelay - timeWidth;// (time_delay + time_width);
int mapMax = capacity - 1 - timeDelay;// - time_delay;
int mapRange = mapMax - mapMin;
int n = width * height;
pixelIndex = 0;
if(blend){
for(int i = 0; i < n; i++) {
//find pixel point in local reference
precise = delayMapPixels[i] * mapRange + mapMin;
//cast it to an integer
offset = int(precise);
//calculate alpha
alpha = precise - offset;
invalpha = 1 - alpha;
//convert to framepointer reference point
lower_offset = frame_index(framepointer, offset, capacity);
upper_offset = frame_index(framepointer, offset+1, capacity);
//get buffers
unsigned char *a = buffer[lower_offset] + pixelIndex;
unsigned char *b = buffer[upper_offset] + pixelIndex;
//interpolate and set values
for(int c = 0; c < bytesPerPixel; c++) {
*outbuffer++ = (a[c]*invalpha)+(b[c]*alpha);
}
pixelIndex += bytesPerPixel;
}
}
else{
pixelIndex = 0;
for(int i = 0; i < n; i++) {
int index = delayMapPixels[i] * mapRange + mapMin;
index = frame_index(framepointer, index, capacity);
// faster than memcpy because the compiler can optimize it
for(int c = 0; c < bytesPerPixel; c++) {
*outbuffer++ = buffer[index][pixelIndex + c];
}
pixelIndex += bytesPerPixel;
}
}
outputImage.setFromPixels(writebuffer, width, height, type);
outputIsDirty = false;
}
return outputImage;
}
static inline void *
__page_get(void)
{
void *hp = cos_get_vas_page();
struct frame *f = frame_alloc();
assert(hp && f);
frame_ref(f);
f->nmaps = -1; /* belongs to us... */
f->c.addr = (vaddr_t)hp; /* ...at this address */
if (cos_mmap_cntl(COS_MMAP_GRANT, MAPPING_RW, cos_spd_id(), (vaddr_t)hp, frame_index(f))) {
printc("grant @ %p for frame %d\n", hp, frame_index(f));
BUG();
}
return hp;
}
bool IdentityRS::render(stk::StkFrames &frames, MuTick base_tick, MuTick start_tick, MuTick end_tick) {
for (MuTick i=start_tick; i<end_tick; i++) {
for (int j=frames.channels()-1; j>=0; j--) {
frames(frame_index(base_tick, i), j) = i;
}
}
return true;
}
static inline void *
__page_get(void)
{
void *hp = cos_get_vas_page();
struct frame *f = frame_alloc();
assert(hp && f);
frame_ref(f);
if (cos_mmap_cntl(COS_MMAP_GRANT, 0, cos_spd_id(), (vaddr_t)hp, frame_index(f))) {
BUG();
}
return hp;
}
bool ResampleStream::render(MuTick buffer_start, MuBuffer *buffer) {
if ((sample_source_ == NULL) || (timing_source_ == NULL)) {
return false;
}
timing_buffer_.resize(buffer->frames(), buffer->channels());
MuUtils::zero_buffer(&timing_buffer_);
if (!timing_source_->render(buffer_start, &timing_buffer_)) {
return false;
}
MuFloat min = (double)LONG_MAX;
MuFloat max = (double)LONG_MIN;
// find min and max times in timing_buffer_
for (int i=timing_buffer_.frames()-1; i>=0; i--) {
MuFloat v = timing_buffer_(i, 0); // channel 0 only
min = (v < min) ? v : min;
max = (v > max) ? v : max;
}
MuTick min_tick = (MuTick)floor(min);
MuTick max_tick = (MuTick)ceil(max);
// add 1 to for sample[i+1] interpolation.
MuTick n_frames = (max_tick - min_tick) + 1;
// Fetch source samples
sample_buffer_.resize(n_frames, buffer->channels());
MuUtils::zero_buffer(&sample_buffer_);
if (!sample_source_->render(min_tick, &sample_buffer_)) {
return false;
}
MuTick buffer_end = buffer_start + buffer->frames();
for (MuTick tick=buffer_start; tick<buffer_end; tick++) {
// use channel 0 (only) for timing information
MuFloat ftau = timing_buffer_(frame_index(buffer_start, tick), 0);
MuTick itau = ( MuTick )ftau;
MuFloat alpha = ftau - itau;
for (int channel = buffer->channels()-1; channel >= 0; channel--) {
if (alpha == 0.0) {
(*buffer)(frame_index(buffer_start, tick), channel) =
sample_buffer_(frame_index(min_tick, itau), channel);
} else {
MuFloat y0 = sample_buffer_(frame_index(min_tick, itau), channel);
MuFloat y1 = sample_buffer_(frame_index(min_tick, itau+1), channel);
MuFloat dy = y1 - y0;
(*buffer)(frame_index(buffer_start, tick), channel) = y0 + dy * alpha;
}
}
}
return true;
}
/* Make a child mapping */
static struct mapping *
mapping_crt(struct mapping *p, struct frame *f, spdid_t dest, vaddr_t to, int flags)
{
struct comp_vas *cv = cvas_lookup(dest);
struct mapping *m = NULL;
long idx = to >> PAGE_SHIFT;
assert(!p || p->f == f);
assert(dest && to);
/* no vas structure for this spd yet... */
if (!cv) {
cv = cvas_alloc(dest);
if (!cv) goto done;
assert(cv == cvas_lookup(dest));
}
assert(cv->pages);
if (cvect_lookup(cv->pages, idx)) goto collision;
cvas_ref(cv);
m = cslab_alloc_mapping();
if (!m) goto collision;
if (cos_mmap_cntl(COS_MMAP_GRANT, flags, dest, to, frame_index(f))) {
printc("mem_man: could not grant at %x:%d\n", dest, (int)to);
goto no_mapping;
}
mapping_init(m, dest, to, p, f);
assert(!p || frame_nrefs(f) > 0);
frame_ref(f);
assert(frame_nrefs(f) > 0);
if (cvect_add(cv->pages, m, idx)) BUG();
done:
return m;
no_mapping:
cslab_free_mapping(m);
collision:
cvas_deref(cv);
m = NULL;
goto done;
}
static void
__mapping_destroy(struct mapping *m)
{
struct comp_vas *cv;
int idx;
assert(m);
assert(EMPTY_LIST(m, _s, s_));
assert(m->p == NULL && m->c == NULL);
cv = cvas_lookup(m->spdid);
assert(cv && cv->pages);
assert(m == cvect_lookup(cv->pages, m->addr >> PAGE_SHIFT));
cvect_del(cv->pages, m->addr >> PAGE_SHIFT);
cvas_deref(cv);
idx = cos_mmap_cntl(COS_MMAP_REVOKE, 0, m->spdid, m->addr, 0);
assert(idx == frame_index(m->f));
frame_deref(m->f);
cslab_free_mapping(m);
}
int main()
{
ct_print_header("text/html", NULL);
const gchar *path = ct_get_path_info();
const gchar *query = ct_get_query_string();
GList *thumbs = gen_thumbs(read_dir("large"));
if (!path || g_str_equal(path, "/"))
frame_index();
else if (g_str_equal(path, "/head"))
frame_head();
else if (g_str_equal(path, "/nav"))
frame_nav(FALSE, thumbs);
else if (g_str_equal(path, "/noframe"))
frame_nav(TRUE, thumbs);
else if (g_str_equal(path, "/show_small"))
frame_show("small", "show_large", query);
else if (g_str_equal(path, "/show_large"))
frame_show("large", "show_small", query);
}
void ofxSlitScan::pixelsForFrame(int num, unsigned char* outbuf){
memcpy(outbuf, buffer[frame_index(framepointer, num, capacity)], bytesPerFrame*sizeof(unsigned char));
}