void backward_propagate_onestep_2d(int nx, int nz, float* vel, float *wav, float* waveN, float* waveNm1, int nt, float dt, int srcx, int srcz, int time_step)
{
int model_size = nx * nz;
int check_step = 5;
if (time_step == nt - 1) {
//Load last two time_step wave field
char check_file_name1[64] = "/tmp/check_time_last_1.su";
char check_file_name2[64] = "/tmp/check_time_last_2.su";
readimg(check_file_name1, waveNm1, nx, nz);
readimg(check_file_name2, waveN, nx, nz);
}
else if ((check_step > 0) && !(time_step % check_step) && (time_step != 0)) {
char check_file_name1[64];
char check_file_name2[64];
sprintf(check_file_name1, "/tmp/check_time_%d_1.su", time_step);
sprintf(check_file_name2, "/tmp/check_time_%d_2.su", time_step);
readimg(check_file_name1, waveNm1, nx, nz);
readimg(check_file_name2, waveN, nx, nz);
}
fd4t10s_2d(nx, nz, vel, waveN, waveNm1);
float *tmp = waveN;
waveN = waveNm1;
waveNm1 = tmp;
if (time_step < nt) {
int src_i = 0;
for (src_i = 0; src_i < 1 ; src_i ++) {
int source_location = srcx * nz + srcz;
waveN[source_location] -= wav[time_step];
}
}
}
bool
PNGInput::read_native_scanline (int y, int z, void *data)
{
y -= m_spec.y;
if (y < 0 || y >= m_spec.height) // out of range scanline
return false;
if (m_interlace_type != 0) {
// Interlaced. Punt and read the whole image
if (m_buf.empty ())
readimg ();
size_t size = spec().scanline_bytes();
memcpy (data, &m_buf[0] + y * size, size);
} else {
// Not an interlaced image -- read just one row
if (m_next_scanline > y) {
// User is trying to read an earlier scanline than the one we're
// up to. Easy fix: close the file and re-open.
ImageSpec dummyspec;
int subimage = current_subimage();
if (! close () ||
! open (m_filename, dummyspec) ||
! seek_subimage (subimage, dummyspec))
return false; // Somehow, the re-open failed
assert (m_next_scanline == 0 && current_subimage() == subimage);
}
while (m_next_scanline <= y) {
// Keep reading until we're read the scanline we really need
// std::cerr << "reading scanline " << m_next_scanline << "\n";
std::string s = PNG_pvt::read_next_scanline (m_png, data);
if (s.length ()) {
close ();
error ("%s", s.c_str ());
return false;
}
++m_next_scanline;
}
}
// PNG specifically dictates unassociated (un-"premultiplied") alpha.
// Convert to associated unless we were requested not to do so.
if (m_spec.alpha_channel != -1 && !m_keep_unassociated_alpha) {
float gamma = m_spec.get_float_attribute ("oiio:Gamma", 1.0f);
if (m_spec.format == TypeDesc::UINT16)
associateAlpha ((unsigned short *)data, m_spec.width,
m_spec.nchannels, m_spec.alpha_channel,
gamma);
else
associateAlpha ((unsigned char *)data, m_spec.width,
m_spec.nchannels, m_spec.alpha_channel,
gamma);
}
return true;
}
