FFmpeg: libavcodec/dct.h Source File

FFmpeg

[フレーム]

libavcodec

dct.h

Go to the documentation of this file.

1 /*

2 * (I)DCT Transforms

6 *

7 * This file is part of FFmpeg.

8 *

9 * FFmpeg is free software; you can redistribute it and/or

10 * modify it under the terms of the GNU Lesser General Public

11 * License as published by the Free Software Foundation; either

12 * version 2.1 of the License, or (at your option) any later version.

13 *

14 * FFmpeg is distributed in the hope that it will be useful,

15 * but WITHOUT ANY WARRANTY; without even the implied warranty of

16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

17 * Lesser General Public License for more details.

18 *

19 * You should have received a copy of the GNU Lesser General Public

20 * License along with FFmpeg; if not, write to the Free Software

21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

22 */

24 #ifndef AVCODEC_DCT_H

25 #define AVCODEC_DCT_H

27 #include <stdint.h>

29 #include "rdft.h"

31 struct DCTContext {

32 int nbits;

33 int inverse;

34 RDFTContext rdft;

35 const float *costab;

36 FFTSample *csc2;

37 void (*dct_calc)(struct DCTContext *s, FFTSample *data);

38 void (*dct32)(FFTSample *out, const FFTSample *in);

39 };

41 /**

42 * Set up DCT.

43 * @param nbits size of the input array:

44 * (1 << nbits) for DCT-II, DCT-III and DST-I

45 * (1 << nbits) + 1 for DCT-I

46 *

47 * @note the first element of the input of DST-I is ignored

48 */

49 int ff_dct_init(DCTContext *s, int nbits, enum DCTTransformType type);

50 void ff_dct_end (DCTContext *s);

52 void ff_dct_init_x86(DCTContext *s);

54 void ff_fdct_ifast(int16_t *data);

55 void ff_fdct_ifast248(int16_t *data);

56 void ff_jpeg_fdct_islow_8(int16_t *data);

57 void ff_jpeg_fdct_islow_10(int16_t *data);

58 void ff_fdct248_islow_8(int16_t *data);

59 void ff_fdct248_islow_10(int16_t *data);

61 void ff_j_rev_dct(int16_t *data);

62 void ff_j_rev_dct4(int16_t *data);

63 void ff_j_rev_dct2(int16_t *data);

64 void ff_j_rev_dct1(int16_t *data);

66 void ff_fdct_mmx(int16_t *block);

67 void ff_fdct_mmxext(int16_t *block);

68 void ff_fdct_sse2(int16_t *block);

70 #endif /* AVCODEC_DCT_H */

Generated on Sun Mar 23 2014 23:49:53 for FFmpeg by doxygen 1.8.2