2 * This file is part of FFmpeg.
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.
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.
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
19 #ifndef AVCODEC_MPEGAUDIODSP_H
20 #define AVCODEC_MPEGAUDIODSP_H
25 #include "libavutil/common.h"
27 typedef struct MPADSPContext {
28 void (*apply_window_float)(float *synth_buf, float *window,
29 int *dither_state, float *samples,
31 void (*apply_window_fixed)(int32_t *synth_buf, int32_t *window,
32 int *dither_state, int16_t *samples,
34 void (*dct32_float)(float *dst, const float *src);
35 void (*dct32_fixed)(int *dst, const int *src);
37 void (*imdct36_blocks_float)(float *out, float *buf, float *in,
38 int count, int switch_point, int block_type);
39 void (*imdct36_blocks_fixed)(int *out, int *buf, int *in,
40 int count, int switch_point, int block_type);
43 void ff_mpadsp_init(MPADSPContext *s);
45 extern int32_t ff_mpa_synth_window_fixed[];
46 extern float ff_mpa_synth_window_float[];
48 extern const int32_t ff_mpa_enwindow[257];
50 void ff_mpa_synth_filter_fixed(MPADSPContext *s,
51 int32_t *synth_buf_ptr, int *synth_buf_offset,
52 int32_t *window, int *dither_state,
53 int16_t *samples, ptrdiff_t incr,
56 void ff_mpa_synth_filter_float(MPADSPContext *s,
57 float *synth_buf_ptr, int *synth_buf_offset,
58 float *window, int *dither_state,
59 float *samples, ptrdiff_t incr,
62 void ff_mpadsp_init_aarch64(MPADSPContext *s);
63 void ff_mpadsp_init_arm(MPADSPContext *s);
64 void ff_mpadsp_init_ppc(MPADSPContext *s);
65 void ff_mpadsp_init_x86(MPADSPContext *s);
66 void ff_mpadsp_init_mipsfpu(MPADSPContext *s);
67 void ff_mpadsp_init_mipsdsp(MPADSPContext *s);
69 void ff_mpa_synth_init_float(float *window);
70 void ff_mpa_synth_init_fixed(int32_t *window);
72 void ff_mpadsp_apply_window_float(float *synth_buf, float *window,
73 int *dither_state, float *samples,
75 void ff_mpadsp_apply_window_fixed(int32_t *synth_buf, int32_t *window,
76 int *dither_state, int16_t *samples,
79 void ff_imdct36_blocks_float(float *out, float *buf, float *in,
80 int count, int switch_point, int block_type);
82 void ff_imdct36_blocks_fixed(int *out, int *buf, int *in,
83 int count, int switch_point, int block_type);
85 void ff_init_mpadsp_tabs_float(void);
86 void ff_init_mpadsp_tabs_fixed(void);
88 /** For SSE implementation, MDCT_BUF_SIZE/2 should be 128-bit aligned */
89 #define MDCT_BUF_SIZE FFALIGN(36, 2*4)
91 extern int ff_mdct_win_fixed[8][MDCT_BUF_SIZE];
92 extern float ff_mdct_win_float[8][MDCT_BUF_SIZE];
94 #endif /* AVCODEC_MPEGAUDIODSP_H */