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  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_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 */
  90.