mpegaudiodsp.h (3873B)
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 <stddef.h> 23 #include <stdint.h> 24 25 #include "libavutil/attributes_internal.h" 26 #include "libavutil/macros.h" 27 28 typedef struct MPADSPContext { 29 void (*apply_window_float)(float *synth_buf, float *window, 30 int *dither_state, float *samples, 31 ptrdiff_t incr); 32 void (*apply_window_fixed)(int32_t *synth_buf, int32_t *window, 33 int *dither_state, int16_t *samples, 34 ptrdiff_t incr); 35 void (*dct32_float)(float *dst, const float *src); 36 void (*dct32_fixed)(int *dst, const int *src); 37 38 void (*imdct36_blocks_float)(float *out, float *buf, float *in, 39 int count, int switch_point, int block_type); 40 void (*imdct36_blocks_fixed)(int *out, int *buf, int *in, 41 int count, int switch_point, int block_type); 42 } MPADSPContext; 43 44 FF_VISIBILITY_PUSH_HIDDEN 45 void ff_mpadsp_init(MPADSPContext *s); 46 47 extern int32_t ff_mpa_synth_window_fixed[]; 48 extern float ff_mpa_synth_window_float[]; 49 50 extern const int32_t ff_mpa_enwindow[257]; 51 52 void ff_mpa_synth_filter_fixed(MPADSPContext *s, 53 int32_t *synth_buf_ptr, int *synth_buf_offset, 54 int32_t *window, int *dither_state, 55 int16_t *samples, ptrdiff_t incr, 56 int32_t *sb_samples); 57 58 void ff_mpa_synth_filter_float(MPADSPContext *s, 59 float *synth_buf_ptr, int *synth_buf_offset, 60 float *window, int *dither_state, 61 float *samples, ptrdiff_t incr, 62 float *sb_samples); 63 64 void ff_mpadsp_init_aarch64(MPADSPContext *s); 65 void ff_mpadsp_init_arm(MPADSPContext *s); 66 void ff_mpadsp_init_ppc(MPADSPContext *s); 67 void ff_mpadsp_init_x86(MPADSPContext *s); 68 void ff_mpadsp_init_x86_tabs(void); 69 void ff_mpadsp_init_mipsfpu(MPADSPContext *s); 70 void ff_mpadsp_init_mipsdsp(MPADSPContext *s); 71 72 void ff_mpa_synth_init_float(void); 73 void ff_mpa_synth_init_fixed(void); 74 75 void ff_mpadsp_apply_window_float(float *synth_buf, float *window, 76 int *dither_state, float *samples, 77 ptrdiff_t incr); 78 void ff_mpadsp_apply_window_fixed(int32_t *synth_buf, int32_t *window, 79 int *dither_state, int16_t *samples, 80 ptrdiff_t incr); 81 82 void ff_imdct36_blocks_float(float *out, float *buf, float *in, 83 int count, int switch_point, int block_type); 84 85 void ff_imdct36_blocks_fixed(int *out, int *buf, int *in, 86 int count, int switch_point, int block_type); 87 88 /** For SSE implementation, MDCT_BUF_SIZE/2 should be 128-bit aligned */ 89 #define MDCT_BUF_SIZE FFALIGN(36, 2*4) 90 91 extern int ff_mdct_win_fixed[8][MDCT_BUF_SIZE]; 92 extern float ff_mdct_win_float[8][MDCT_BUF_SIZE]; 93 FF_VISIBILITY_POP_HIDDEN 94 95 #endif /* AVCODEC_MPEGAUDIODSP_H */