Independent JPEG Group's slow & accurate dct.
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#include "libavutil/common.h"
#include "dct.h"
#include "bit_depth_template.c"
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#define | DCTSIZE 8 |
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#define | BITS_IN_JSAMPLE BIT_DEPTH |
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#define | GLOBAL(x) x |
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#define | RIGHT_SHIFT(x, n) ((x) >> (n)) |
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#define | MULTIPLY16C16(var, const) ((var)*(const)) |
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#define | DESCALE(x, n) RIGHT_SHIFT((x) + (1 << ((n) - 1)), n) |
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#define | CONST_BITS 13 |
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#define | PASS1_BITS 1 /* lose a little precision to avoid overflow */ |
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#define | OUT_SHIFT (PASS1_BITS + 1) |
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#define | FIX_0_298631336 ((int32_t) 2446) /* FIX(0.298631336) */ |
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#define | FIX_0_390180644 ((int32_t) 3196) /* FIX(0.390180644) */ |
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#define | FIX_0_541196100 ((int32_t) 4433) /* FIX(0.541196100) */ |
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#define | FIX_0_765366865 ((int32_t) 6270) /* FIX(0.765366865) */ |
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#define | FIX_0_899976223 ((int32_t) 7373) /* FIX(0.899976223) */ |
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#define | FIX_1_175875602 ((int32_t) 9633) /* FIX(1.175875602) */ |
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#define | FIX_1_501321110 ((int32_t) 12299) /* FIX(1.501321110) */ |
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#define | FIX_1_847759065 ((int32_t) 15137) /* FIX(1.847759065) */ |
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#define | FIX_1_961570560 ((int32_t) 16069) /* FIX(1.961570560) */ |
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#define | FIX_2_053119869 ((int32_t) 16819) /* FIX(2.053119869) */ |
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#define | FIX_2_562915447 ((int32_t) 20995) /* FIX(2.562915447) */ |
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#define | FIX_3_072711026 ((int32_t) 25172) /* FIX(3.072711026) */ |
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#define | MULTIPLY(var, const) ((var) * (const)) |
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FUNC() | ff_jpeg_fdct_islow (int16_t *data) |
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FUNC() | ff_fdct248_islow (int16_t *data) |
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Independent JPEG Group's slow & accurate dct.
