diff --git a/source/application/jpeg_header/Makefile b/source/application/jpeg_header/Makefile new file mode 100644 index 00000000..c84bac11 --- /dev/null +++ b/source/application/jpeg_header/Makefile @@ -0,0 +1,20 @@ +# +# Authored by: Robert Metchev / Chips & Scripts (rmetchev@ieee.org) +# +# CERN Open Hardware Licence Version 2 - Permissive +# +# Copyright (C) 2024 Robert Metchev +# + +HEIGHT ?= 200 +WIDTH ?= 200 +QF ?= 50 + +all: header.bin +header.bin: jhdr.exe + $(<) $(HEIGHT) $(WIDTH) $(QF) +jhdr.exe: jhdr.c main.c + gcc -o $(@) $(^) + +clean: + rm -f jhdr.exe jhdr.o header.bin diff --git a/source/application/jpeg_header/footer.bin b/source/application/jpeg_header/footer.bin new file mode 100644 index 00000000..cebb027f --- /dev/null +++ b/source/application/jpeg_header/footer.bin @@ -0,0 +1 @@ +ÿÙ \ No newline at end of file diff --git a/source/application/jpeg_header/jhdr.c b/source/application/jpeg_header/jhdr.c new file mode 100644 index 00000000..c1ee6e51 --- /dev/null +++ b/source/application/jpeg_header/jhdr.c @@ -0,0 +1,44 @@ +/* +Authored by: Robert Metchev / Chips & Scripts (rmetchev@ieee.org) +CERN Open Hardware Licence Version 2 - Permissive +Copyright (C) 2024 Robert Metchev + +Pre-compiled JPEG header template (incl. quantization and Huffman tables). +QF = 50, height = 0, width = 0 +Positions: QT0 25..88, QT1 93..156, height 163..164, width 165..166 +Total length = 623 +*/ +#include "jhdr.h" + +int scale_mult (int q, float scale) { + float t = (scale*q + 50)/100; // Round + if (t < 1) // Prevent divide by 0 error + t = 1; + else if (t > 255) // Prevent overflow + t = 255; + return (int)t; +} + +void hdr(int height, int width, int qf, char header_file_name[]) { + char header[] = { 255, 216, 255, 224, 0, 16, 74, 70, 73, 70, 0, 1, 2, 0, 0, 100, 0, 100, 0, 0, 255, 219, 0, 67, 0, 16, 11, 12, 14, 12, 10, 16, 14, 13, 14, 18, 17, 16, 19, 24, 40, 26, 24, 22, 22, 24, 49, 35, 37, 29, 40, 58, 51, 61, 60, 57, 51, 56, 55, 64, 72, 92, 78, 64, 68, 87, 69, 55, 56, 80, 109, 81, 87, 95, 98, 103, 104, 103, 62, 77, 113, 121, 112, 100, 120, 92, 101, 103, 99, 255, 219, 0, 67, 1, 17, 18, 18, 24, 21, 24, 47, 26, 26, 47, 99, 66, 56, 66, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 255, 192, 0, 17, 8, 0, 0, 0, 0, 3, 1, 34, 0, 2, 17, 1, 3, 17, 1, 255, 196, 0, 31, 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 255, 196, 0, 31, 1, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 255, 196, 0, 181, 16, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 125, 1, 2, 3, 0, 4, 17, 5, 18, 33, 49, 65, 6, 19, 81, 97, 7, 34, 113, 20, 50, 129, 145, 161, 8, 35, 66, 177, 193, 21, 82, 209, 240, 36, 51, 98, 114, 130, 9, 10, 22, 23, 24, 25, 26, 37, 38, 39, 40, 41, 42, 52, 53, 54, 55, 56, 57, 58, 67, 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101, 102, 103, 104, 105, 106, 115, 116, 117, 118, 119, 120, 121, 122, 131, 132, 133, 134, 135, 136, 137, 138, 146, 147, 148, 149, 150, 151, 152, 153, 154, 162, 163, 164, 165, 166, 167, 168, 169, 170, 178, 179, 180, 181, 182, 183, 184, 185, 186, 194, 195, 196, 197, 198, 199, 200, 201, 202, 210, 211, 212, 213, 214, 215, 216, 217, 218, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 255, 196, 0, 181, 17, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 119, 0, 1, 2, 3, 17, 4, 5, 33, 49, 6, 18, 65, 81, 7, 97, 113, 19, 34, 50, 129, 8, 20, 66, 145, 161, 177, 193, 9, 35, 51, 82, 240, 21, 98, 114, 209, 10, 22, 36, 52, 225, 37, 241, 23, 24, 25, 26, 38, 39, 40, 41, 42, 53, 54, 55, 56, 57, 58, 67, 68, 69, 70, 71, 72, 73, 74, 83, 84, 85, 86, 87, 88, 89, 90, 99, 100, 101, 102, 103, 104, 105, 106, 115, 116, 117, 118, 119, 120, 121, 122, 130, 131, 132, 133, 134, 135, 136, 137, 138, 146, 147, 148, 149, 150, 151, 152, 153, 154, 162, 163, 164, 165, 166, 167, 168, 169, 170, 178, 179, 180, 181, 182, 183, 184, 185, 186, 194, 195, 196, 197, 198, 199, 200, 201, 202, 210, 211, 212, 213, 214, 215, 216, 217, 218, 226, 227, 228, 229, 230, 231, 232, 233, 234, 242, 243, 244, 245, 246, 247, 248, 249, 250, 255, 218, 0, 12, 3, 1, 0, 2, 17, 3, 17, 0, 63, 0}; + float scale; + + if (qf < 50) + scale = 5000/qf; + else + scale = 200 - 2*qf; + + for (int i=25; i<=88; i++) + header[i] = scale_mult(header[i], scale); + for (int i=93; i<=156; i++) + header[i] = scale_mult(header[i], scale); + + header[163] = (height >> 8) & 0xff; + header[164] = height & 0xff; + header[165] = (width >> 8) & 0xff; + header[166] = width & 0xff; + + FILE *f = fopen(header_file_name, "wb"); + fwrite(header, 1, 623, f); + fclose(f); +} diff --git a/source/application/jpeg_header/jhdr.h b/source/application/jpeg_header/jhdr.h new file mode 100644 index 00000000..e9432874 --- /dev/null +++ b/source/application/jpeg_header/jhdr.h @@ -0,0 +1,13 @@ +/* +Authored by: Robert Metchev / Chips & Scripts (rmetchev@ieee.org) +CERN Open Hardware Licence Version 2 - Permissive +Copyright (C) 2024 Robert Metchev + +Pre-compiled JPEG header template (incl. quantization and Huffman tables). +QF = 50, height = 0, width = 0 +Positions: QT0 25..88, QT1 93..156, height 163..164, width 165..166 +Total length = 623 +*/ +#include +#include +void hdr(int height, int width, int qf, char header_file_name[]); diff --git a/source/application/jpeg_header/main.c b/source/application/jpeg_header/main.c new file mode 100644 index 00000000..4f0d5b92 --- /dev/null +++ b/source/application/jpeg_header/main.c @@ -0,0 +1,14 @@ +/* +Authored by: Robert Metchev / Chips & Scripts (rmetchev@ieee.org) +CERN Open Hardware Licence Version 2 - Permissive +Copyright (C) 2024 Robert Metchev +*/ +#include "jhdr.h" +int main(int argc, char *argv[]) { + if(argc <= 2) + exit(1); + // call hdr, write header to "header.bin" + hdr(atoi(argv[1]), atoi(argv[2]), argc > 3 ? atoi(argv[3]) : 50 , argc > 4 ? argv[4] : "header.bin"); + return 0; +} +