Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / audiodsp.h
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #ifndef AVCODEC_AUDIODSP_H
20 #define AVCODEC_AUDIODSP_H
21
22 #include <stdint.h>
23
24 typedef struct AudioDSPContext {
25 /**
26 * Calculate scalar product of two vectors.
27 * @param len length of vectors, should be multiple of 16
28 */
29 int32_t (*scalarproduct_int16)(const int16_t *v1,
30 const int16_t *v2 /* align 16 */, int len);
31
32 /**
33 * Clip each element in an array of int32_t to a given minimum and
34 * maximum value.
35 * @param dst destination array
36 * constraints: 16-byte aligned
37 * @param src source array
38 * constraints: 16-byte aligned
39 * @param min minimum value
40 * constraints: must be in the range [-(1 << 24), 1 << 24]
41 * @param max maximum value
42 * constraints: must be in the range [-(1 << 24), 1 << 24]
43 * @param len number of elements in the array
44 * constraints: multiple of 32 greater than zero
45 */
46 void (*vector_clip_int32)(int32_t *dst, const int32_t *src, int32_t min,
47 int32_t max, unsigned int len);
48 /* assume len is a multiple of 8, and arrays are 16-byte aligned */
49 void (*vector_clipf)(float *dst /* align 16 */,
50 const float *src /* align 16 */,
51 float min, float max, int len /* align 16 */);
52 } AudioDSPContext;
53
54 void ff_audiodsp_init(AudioDSPContext *c);
55 void ff_audiodsp_init_arm(AudioDSPContext *c);
56 void ff_audiodsp_init_ppc(AudioDSPContext *c);
57 void ff_audiodsp_init_x86(AudioDSPContext *c);
58
59 #endif /* AVCODEC_AUDIODSP_H */