Spencer/PNG_CC
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2021-12-03 18:45:05 -05:00
parent 5b45337d98
commit 9afed448df
2 changed files with 4 additions and 1 deletions
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README.md
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@@ -4,6 +4,8 @@ Sample program to embed messages into PNG images
## Install
**NOTE:** Set the core_count variable to one value lower than maximum cores on the host in cmd/pspng.c
Requires zlib, pthread, and sodium header files to compile (These will be distro specific packages)
Build:

3
cmd/pspng.c
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@@ -265,7 +265,8 @@ static int crc_embed_data(unsigned char *data, unsigned int data_length, int bit
raw_data = create_raw_pixel_values(data, bit_width, color_range, sliding_window);
random_window_bit_change(data, raw_data, bit_width, 2, color_range, sliding_window, offset);
if(offset > 500000) {
//if(offset > 500000) {
if(offset == -1) {
new_data = calloc(300000, sizeof(unsigned char));
for(int k = 0; k < 300000; k++) {
new_data[k] = data[offset-(offset-prior_offset-1)+k];