2 * This file is part of Libav.
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.
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.
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
19 #ifndef AVCODEC_MPEGAUDIODSP_H
20 #define AVCODEC_MPEGAUDIODSP_H
23 #include "libavutil/common.h"
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);
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);
39 void ff_mpadsp_init(MPADSPContext *s);
41 extern int32_t ff_mpa_synth_window_fixed[];
42 extern float ff_mpa_synth_window_float[];
44 extern const int32_t ff_mpa_enwindow[257];
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,
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,
58 void ff_mpadsp_init_arm(MPADSPContext *s);
59 void ff_mpadsp_init_mmx(MPADSPContext *s);
60 void ff_mpadsp_init_altivec(MPADSPContext *s);
61 void ff_mpadsp_init_mipsfpu(MPADSPContext *s);
62 void ff_mpadsp_init_mipsdspr1(MPADSPContext *s);
64 void ff_mpa_synth_init_float(float *window);
65 void ff_mpa_synth_init_fixed(int32_t *window);
67 void ff_mpadsp_apply_window_float(float *synth_buf, float *window,
68 int *dither_state, float *samples,
70 void ff_mpadsp_apply_window_fixed(int32_t *synth_buf, int32_t *window,
71 int *dither_state, int16_t *samples,
74 void ff_imdct36_blocks_float(float *out, float *buf, float *in,
75 int count, int switch_point, int block_type);
77 void ff_imdct36_blocks_fixed(int *out, int *buf, int *in,
78 int count, int switch_point, int block_type);
80 void ff_init_mpadsp_tabs_float(void);
81 void ff_init_mpadsp_tabs_fixed(void);
83 /** For SSE implementation, MDCT_BUF_SIZE/2 should be 128-bit aligned */
84 #define MDCT_BUF_SIZE FFALIGN(36, 2*4)
86 extern int ff_mdct_win_fixed[8][MDCT_BUF_SIZE];
87 extern float ff_mdct_win_float[8][MDCT_BUF_SIZE];
89 #endif /* AVCODEC_MPEGAUDIODSP_H */