Mercurial > hg > wm
comparison Meerwald/dct.h @ 0:be303a3f5ea8
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| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
|---|---|
| date | Sun, 12 Aug 2007 13:14:34 +0200 |
| parents | |
| children | acb6967ee76d |
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| -1:000000000000 | 0:be303a3f5ea8 |
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| 1 #ifndef DCT_H | |
| 2 #define DCT_H | |
| 3 | |
| 4 #include "wm.h" | |
| 5 #include "coeff.h" | |
| 6 #ifdef __cplusplus | |
| 7 extern "C" { | |
| 8 #endif | |
| 9 #include "pgm.h" | |
| 10 #ifdef __cplusplus | |
| 11 } | |
| 12 #endif | |
| 13 | |
| 14 extern int N; | |
| 15 extern int M; | |
| 16 | |
| 17 void init_dct_NxM(int width, int height); | |
| 18 void fdct_NxM(gray **pixels, double **dcts); | |
| 19 void idct_NxM(double **dcts, gray **pixels); | |
| 20 | |
| 21 void init_dct_NxN(int width, int height); | |
| 22 void fdct_NxN(gray **pixels, double **dcts); | |
| 23 void idct_NxN(double **dcts, gray **pixels); | |
| 24 void fdct_inplace_NxN(double **coeffs); | |
| 25 void idct_inplace_NxN(double **coeffs); | |
| 26 | |
| 27 /* | |
| 28 * 'NJPEG' defines the JPEG's DCT block size (8x8) | |
| 29 */ | |
| 30 #define NJPEG 8 | |
| 31 | |
| 32 void init_quantum_8x8(int quality); | |
| 33 void init_quantum_JPEG_lumin(int quality); | |
| 34 void init_quantum_JPEG_chromin(int quality); | |
| 35 void quantize_8x8(double **transform); | |
| 36 void dequantize_8x8(double **transform); | |
| 37 void init_dct_8x8(); | |
| 38 void fdct_8x8(gray **input, double **output); | |
| 39 void fdct_block_8x8(gray **input, int col, int row, double **output); | |
| 40 void idct_8x8(double **input, gray **output); | |
| 41 void idct_block_8x8(double **input, gray **output, int col, int row); | |
| 42 int is_middle_frequency_coeff_8x8(int coeff); | |
| 43 | |
| 44 #endif |