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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * (I)DCT Transforms |
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| 3 | * Copyright (c) 2009 Peter Ross |
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| 4 | * Copyright (c) 2010 Alex Converse |
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| 5 | * Copyright (c) 2010 Vitor Sessak |
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| 6 | * |
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| 7 | * This file is part of FFmpeg. |
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| 8 | * |
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| 9 | * FFmpeg is free software; you can redistribute it and/or |
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| 10 | * modify it under the terms of the GNU Lesser General Public |
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| 11 | * License as published by the Free Software Foundation; either |
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| 12 | * version 2.1 of the License, or (at your option) any later version. |
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| 13 | * |
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| 14 | * FFmpeg is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * Lesser General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU Lesser General Public |
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| 20 | * License along with FFmpeg; if not, write to the Free Software |
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| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |||
| 24 | #ifndef AVCODEC_DCT_H |
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| 25 | #define AVCODEC_DCT_H |
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| 26 | |||
| 27 | #include |
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| 28 | |||
| 29 | #include "rdft.h" |
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| 30 | |||
| 31 | struct DCTContext { |
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| 32 | int nbits; |
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| 33 | int inverse; |
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| 34 | RDFTContext rdft; |
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| 35 | const float *costab; |
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| 36 | FFTSample *csc2; |
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| 37 | void (*dct_calc)(struct DCTContext *s, FFTSample *data); |
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| 38 | void (*dct32)(FFTSample *out, const FFTSample *in); |
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| 39 | }; |
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| 40 | |||
| 41 | /** |
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| 42 | * Set up DCT. |
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| 43 | * @param nbits size of the input array: |
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| 44 | * (1 << nbits) for DCT-II, DCT-III and DST-I |
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| 45 | * (1 << nbits) + 1 for DCT-I |
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| 46 | * |
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| 47 | * @note the first element of the input of DST-I is ignored |
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| 48 | */ |
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| 49 | int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType type); |
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| 50 | void ff_dct_end (DCTContext *s); |
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| 51 | |||
| 52 | void ff_dct_init_x86(DCTContext *s); |
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| 53 | |||
| 54 | void ff_fdct_ifast(int16_t *data); |
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| 55 | void ff_fdct_ifast248(int16_t *data); |
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| 56 | void ff_jpeg_fdct_islow_8(int16_t *data); |
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| 57 | void ff_jpeg_fdct_islow_10(int16_t *data); |
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| 58 | void ff_fdct248_islow_8(int16_t *data); |
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| 59 | void ff_fdct248_islow_10(int16_t *data); |
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| 60 | |||
| 61 | void ff_j_rev_dct(int16_t *data); |
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| 62 | void ff_j_rev_dct4(int16_t *data); |
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| 63 | void ff_j_rev_dct2(int16_t *data); |
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| 64 | void ff_j_rev_dct1(int16_t *data); |
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| 65 | |||
| 66 | void ff_fdct_mmx(int16_t *block); |
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| 67 | void ff_fdct_mmxext(int16_t *block); |
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| 68 | void ff_fdct_sse2(int16_t *block); |
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| 69 | |||
| 70 | #endif /* AVCODEC_DCT_H */ |