Created
September 25, 2022 00:19
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Realtime SSTV hack
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| import struct | |
| from PIL import Image, ImageOps | |
| import io | |
| import requests | |
| sstv = open("/tmp/myfifo", "rb") | |
| def send_to_server(bytes_send): | |
| url = "http://file.foxden:5000" | |
| payload={'font':'DejaVuSansMono.ttf'} | |
| files=[ | |
| ('image',('Untitled.png',bytes_send,'image/png')) | |
| ] | |
| headers = {} | |
| response = requests.request("POST", url, headers=headers, data=payload, files=files) | |
| print(response.text) | |
| skip = False | |
| while 1: | |
| #read header for length | |
| header = sstv.read(2) | |
| length = struct.unpack("H", header)[0] | |
| print(length) | |
| length_bytes = length * 3 | |
| #read pixel data | |
| pixel_data = sstv.read(length_bytes) | |
| #skip every second line hack | |
| if skip == False: | |
| skip = True | |
| else: | |
| skip = False | |
| continue | |
| img = Image.frombytes("RGB", (length, 1), pixel_data) | |
| img = ImageOps.mirror(img) | |
| img_byte_arr = io.BytesIO() | |
| img.save(img_byte_arr, format='PNG') | |
| img_byte_arr.seek(0) | |
| send_to_server(img_byte_arr) | |
| print("line") |
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| diff --git a/video.c b/video.c | |
| index 389751f..ba21c66 100644 | |
| --- a/video.c | |
| +++ b/video.c | |
| @@ -37,7 +37,10 @@ gboolean GetVideo(guchar Mode, double Rate, int Skip, gboolean Redraw) { | |
| double ChanStart[4] = {0}, ChanLen[4] = {0}; | |
| guchar Image[800][616][3] = {{{0}}}; | |
| guchar Channel = 0, WinIdx = 0; | |
| - | |
| + char * myfifo = "/tmp/myfifo"; | |
| + int fd; | |
| + mkfifo(myfifo, 0666); | |
| + fd = open(myfifo, O_WRONLY); | |
| typedef struct { | |
| int X; | |
| int Y; | |
| @@ -426,6 +429,7 @@ gboolean GetVideo(guchar Mode, double Rate, int Skip, gboolean Redraw) { | |
| // Calculate and draw pixels to pixbuf on line change | |
| if (x == ModeSpec[Mode].ImgWidth - 1 || PixelGrid[PixelIdx].Last) { | |
| + write(fd, &ModeSpec[Mode].ImgWidth, sizeof(ModeSpec[Mode].ImgWidth)); | |
| for (tx = 0; tx < ModeSpec[Mode].ImgWidth; tx++) { | |
| p = pixels + y * rowstride + tx * 3; | |
| @@ -454,6 +458,10 @@ gboolean GetVideo(guchar Mode, double Rate, int Skip, gboolean Redraw) { | |
| p[0] = p[1] = p[2] = Image[tx][y][0]; | |
| break; | |
| } | |
| + | |
| + // write to fifo with image buffer | |
| + | |
| + write(fd, p, 3); | |
| } | |
| if (!Redraw || y % 5 == 0 || PixelGrid[PixelIdx].Last) { |
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