virtual HRESULT VideoInputFrameArrived(IDeckLinkVideoInputFrame *in,
IDeckLinkAudioInputPacket *audio_in) {
RawFrame *out;
AudioPacket *audio_out;
void *data;
uint8_t *bytes;
size_t i, spitch, h;
if (in != NULL) {
if (in->GetFlags( ) & bmdFrameHasNoInputSource) {
fprintf(stderr, "DeckLink input: no signal\n");
} else {
out = new RawFrame(in->GetWidth(), in->GetHeight(), pf);
out->set_field_dominance(dominance);
spitch = in->GetRowBytes( );
h = in->GetHeight( );
in->GetBytes(&data);
bytes = (uint8_t *) data;
for (i = 0; i < h; i++) {
memcpy(out->scanline(i), bytes, out->pitch( ));
bytes += spitch;
}
if (out_pipe.can_put( )) {
out_pipe.put(out);
} else {
fprintf(stderr, "DeckLink: dropping input frame on floor\n");
delete out;
}
}
}
if (audio_in != NULL && audio_pipe != NULL) {
audio_out = new AudioPacket(audio_rate, n_channels, 2,
audio_in->GetSampleFrameCount( ));
if (audio_in->GetBytes(&data) != S_OK) {
throw std::runtime_error(
"DeckLink audio input: GetBytes failed"
);
}
memcpy(audio_out->data( ), data, audio_out->size( ));
audio_pipe->put(audio_out);
}
return S_OK;
}
RawFrame *upscale(RawFrame *in) {
RawFrame *out = new RawFrame(1920, 1080, RawFrame::CbYCrY8422);
uint8_t *scaled_1 = new uint8_t[2*1920];
uint8_t *scaled_2 = new uint8_t[2*1920];
for (int i = 0; i < out->h( ); i++) {
int src_scan = i * 4 / 9;
uint8_t *scanline_1 = in->scanline(src_scan);
uint8_t *scanline_2;
if (src_scan + 1 < in->h( )) {
scanline_2 = in->scanline(src_scan + 1);
} else {
scanline_2 = in->scanline(src_scan);
}
upscale_scanline(scaled_1, scanline_1);
upscale_scanline(scaled_2, scanline_2);
interpolate_scanline(out->scanline(i), scaled_1, scaled_2, (4 * i) % 9);
}
return out;
}
RawFrame *FreetypeFont::render_string(const char *string) {
int x;
RawFrame *ret;
FT_GlyphSlot slot = face->glyph;
FT_Bool use_kerning = FT_HAS_KERNING(face);
FT_UInt glyph_index, previous;
uint8_t *glyph_scanline;
x = 0;
previous = 0;
/* first compute the size of the resulting image */
const char *scan_ptr = string;
while (*scan_ptr != '\0') {
glyph_index = FT_Get_Char_Index(face, *scan_ptr);
scan_ptr++;
if (use_kerning && previous != 0 && glyph_index != 0) {
FT_Vector delta;
FT_Get_Kerning(face, previous, glyph_index,
FT_KERNING_DEFAULT, &delta);
x += delta.x / 64;
}
FTCHK(FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT));
x += slot->advance.x / 64;
previous = glyph_index;
}
/* initialize a raw frame */
ret = new RawFrame(x, _h, RawFrame::BGRAn8);
/* second pass: draw it */
scan_ptr = string;
int xd = 0;
previous = 0;
uint8_t *dest_scanline = ret->data( );
for (unsigned int i = 0; i < ret->size( ); i += 4) {
dest_scanline[i] = bb;
dest_scanline[i+1] = gb;
dest_scanline[i+2] = rb;
dest_scanline[i+3] = ab;
}
while (*scan_ptr != '\0') {
glyph_index = FT_Get_Char_Index(face, *scan_ptr);
scan_ptr++;
if (use_kerning && previous != 0 && glyph_index != 0) {
FT_Vector delta;
FT_Get_Kerning(face, previous, glyph_index,
FT_KERNING_DEFAULT, &delta);
xd += delta.x / 64;
}
FTCHK(FT_Load_Glyph(face, glyph_index, FT_LOAD_RENDER));
//int yd = -(slot->bitmap_top);
int yd = _baseline - slot->bitmap_top;
for (unsigned int y = 0; y < slot->bitmap.rows && yd < _h; y++, yd++) {
if (yd >= 0) {
glyph_scanline = ((uint8_t *)slot->bitmap.buffer)
+ slot->bitmap.pitch * y;
dest_scanline = ret->scanline(yd) + 4*xd;
int xd2 = xd;
for (unsigned int x = 0; x < slot->bitmap.width && xd2 < ret->w( );
x++, xd2++) {
dest_scanline[0] = (bf * glyph_scanline[x]
+ bb * (255 - glyph_scanline[x])) / 255;
dest_scanline[1] = (gf * glyph_scanline[x]
+ gb * (255 - glyph_scanline[x])) / 255;
dest_scanline[2] = (rf * glyph_scanline[x]
+ rb * (255 - glyph_scanline[x])) / 255;
dest_scanline[3] = (af * glyph_scanline[x]
+ ab * (255 - glyph_scanline[x])) / 255;
dest_scanline += 4;
}
}
}
xd += slot->advance.x / 64;
previous = glyph_index;
}
return ret;
}