Mercurial > hg > wm
comparison Meerwald-dir/dct.h @ 24:9f20bce6184e v0.7
move directories, support netpbm 11
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:08:59 +0100 |
| parents | Meerwald/dct.h@acb6967ee76d |
| children |
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| 23:71dd4b96221b | 24:9f20bce6184e |
|---|---|
| 1 #ifndef DCT_H | |
| 2 #define DCT_H | |
| 3 | |
| 4 #include "wm.h" | |
| 5 #include "coeff.h" | |
| 6 #include "netpbm/pgm.h" | |
| 7 | |
| 8 extern int N; | |
| 9 extern int M; | |
| 10 | |
| 11 void init_dct_NxM(int width, int height); | |
| 12 void fdct_NxM(gray **pixels, double **dcts); | |
| 13 void idct_NxM(double **dcts, gray **pixels); | |
| 14 | |
| 15 void init_dct_NxN(int width, int height); | |
| 16 void fdct_NxN(gray **pixels, double **dcts); | |
| 17 void idct_NxN(double **dcts, gray **pixels); | |
| 18 void fdct_inplace_NxN(double **coeffs); | |
| 19 void idct_inplace_NxN(double **coeffs); | |
| 20 | |
| 21 /* | |
| 22 * 'NJPEG' defines the JPEG's DCT block size (8x8) | |
| 23 */ | |
| 24 #define NJPEG 8 | |
| 25 | |
| 26 void init_quantum_8x8(int quality); | |
| 27 void init_quantum_JPEG_lumin(int quality); | |
| 28 void init_quantum_JPEG_chromin(int quality); | |
| 29 void quantize_8x8(double **transform); | |
| 30 void dequantize_8x8(double **transform); | |
| 31 void init_dct_8x8(); | |
| 32 void fdct_8x8(gray **input, double **output); | |
| 33 void fdct_block_8x8(gray **input, int col, int row, double **output); | |
| 34 void idct_8x8(double **input, gray **output); | |
| 35 void idct_block_8x8(double **input, gray **output, int col, int row); | |
| 36 int is_middle_frequency_coeff_8x8(int coeff); | |
| 37 | |
| 38 #endif |