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mpegaudiodsp.h
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; 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_MPEGAUDIODSP_H
20 #define AVCODEC_MPEGAUDIODSP_H
21 
22 #include <stdint.h>
23 #include "libavutil/common.h"
24 
25 typedef struct MPADSPContext {
26  void (*apply_window_float)(float *synth_buf, float *window,
27  int *dither_state, float *samples, int incr);
28  void (*apply_window_fixed)(int32_t *synth_buf, int32_t *window,
29  int *dither_state, int16_t *samples, int incr);
30  void (*dct32_float)(float *dst, const float *src);
31  void (*dct32_fixed)(int *dst, const int *src);
32 
33  void (*imdct36_blocks_float)(float *out, float *buf, float *in,
34  int count, int switch_point, int block_type);
35  void (*imdct36_blocks_fixed)(int *out, int *buf, int *in,
36  int count, int switch_point, int block_type);
37 } MPADSPContext;
38 
39 void ff_mpadsp_init(MPADSPContext *s);
40 
41 extern int32_t ff_mpa_synth_window_fixed[];
42 extern float ff_mpa_synth_window_float[];
43 
44 extern const int32_t ff_mpa_enwindow[257];
45 
46 void ff_mpa_synth_filter_fixed(MPADSPContext *s,
47  int32_t *synth_buf_ptr, int *synth_buf_offset,
48  int32_t *window, int *dither_state,
49  int16_t *samples, int incr,
50  int32_t *sb_samples);
51 
52 void ff_mpa_synth_filter_float(MPADSPContext *s,
53  float *synth_buf_ptr, int *synth_buf_offset,
54  float *window, int *dither_state,
55  float *samples, int incr,
56  float *sb_samples);
57 
58 void ff_mpadsp_init_arm(MPADSPContext *s);
59 void ff_mpadsp_init_ppc(MPADSPContext *s);
60 void ff_mpadsp_init_x86(MPADSPContext *s);
61 void ff_mpadsp_init_mipsfpu(MPADSPContext *s);
62 void ff_mpadsp_init_mipsdspr1(MPADSPContext *s);
63 
64 void ff_mpa_synth_init_float(float *window);
65 void ff_mpa_synth_init_fixed(int32_t *window);
66 
67 void ff_mpadsp_apply_window_float(float *synth_buf, float *window,
68  int *dither_state, float *samples,
69  int incr);
70 void ff_mpadsp_apply_window_fixed(int32_t *synth_buf, int32_t *window,
71  int *dither_state, int16_t *samples,
72  int incr);
73 
74 void ff_imdct36_blocks_float(float *out, float *buf, float *in,
75  int count, int switch_point, int block_type);
76 
77 void ff_imdct36_blocks_fixed(int *out, int *buf, int *in,
78  int count, int switch_point, int block_type);
79 
80 void ff_init_mpadsp_tabs_float(void);
81 void ff_init_mpadsp_tabs_fixed(void);
82 
83 /** For SSE implementation, MDCT_BUF_SIZE/2 should be 128-bit aligned */
84 #define MDCT_BUF_SIZE FFALIGN(36, 2*4)
85 
86 extern int ff_mdct_win_fixed[8][MDCT_BUF_SIZE];
87 extern float ff_mdct_win_float[8][MDCT_BUF_SIZE];
88 
89 #endif /* AVCODEC_MPEGAUDIODSP_H */
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