FFmpeg
mpegaudiodsp.h
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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  *
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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/common.h"
26 
27 typedef struct MPADSPContext {
28  void (*apply_window_float)(float *synth_buf, float *window,
29  int *dither_state, float *samples,
30  ptrdiff_t incr);
31  void (*apply_window_fixed)(int32_t *synth_buf, int32_t *window,
32  int *dither_state, int16_t *samples,
33  ptrdiff_t incr);
34  void (*dct32_float)(float *dst, const float *src);
35  void (*dct32_fixed)(int *dst, const int *src);
36 
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);
42 
44 
46 extern float ff_mpa_synth_window_float[];
47 
48 extern const int32_t ff_mpa_enwindow[257];
49 
51  int32_t *synth_buf_ptr, int *synth_buf_offset,
52  int32_t *window, int *dither_state,
53  int16_t *samples, ptrdiff_t incr,
54  int32_t *sb_samples);
55 
57  float *synth_buf_ptr, int *synth_buf_offset,
58  float *window, int *dither_state,
59  float *samples, ptrdiff_t incr,
60  float *sb_samples);
61 
68 
69 void ff_mpa_synth_init_float(float *window);
71 
72 void ff_mpadsp_apply_window_float(float *synth_buf, float *window,
73  int *dither_state, float *samples,
74  ptrdiff_t incr);
76  int *dither_state, int16_t *samples,
77  ptrdiff_t incr);
78 
79 void ff_imdct36_blocks_float(float *out, float *buf, float *in,
80  int count, int switch_point, int block_type);
81 
82 void ff_imdct36_blocks_fixed(int *out, int *buf, int *in,
83  int count, int switch_point, int block_type);
84 
85 void ff_init_mpadsp_tabs_float(void);
86 void ff_init_mpadsp_tabs_fixed(void);
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 
94 #endif /* AVCODEC_MPEGAUDIODSP_H */
out
FILE * out
Definition: movenc.c:54
ff_mdct_win_fixed
int ff_mdct_win_fixed[8][MDCT_BUF_SIZE]
ff_imdct36_blocks_float
void ff_imdct36_blocks_float(float *out, float *buf, float *in, int count, int switch_point, int block_type)
MPADSPContext
Definition: mpegaudiodsp.h:27
window
static SDL_Window * window
Definition: ffplay.c:368
ff_mpa_synth_window_fixed
int32_t ff_mpa_synth_window_fixed[]
ff_mpa_synth_window_float
float ff_mpa_synth_window_float[]
MPADSPContext::imdct36_blocks_float
void(* imdct36_blocks_float)(float *out, float *buf, float *in, int count, int switch_point, int block_type)
Definition: mpegaudiodsp.h:37
ff_mpadsp_apply_window_float
void ff_mpadsp_apply_window_float(float *synth_buf, float *window, int *dither_state, float *samples, ptrdiff_t incr)
ff_mpadsp_init_mipsdsp
void ff_mpadsp_init_mipsdsp(MPADSPContext *s)
Definition: mpegaudiodsp_mips_fixed.c:910
ff_mpadsp_init_mipsfpu
void ff_mpadsp_init_mipsfpu(MPADSPContext *s)
Definition: mpegaudiodsp_mips_float.c:1252
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_imdct36_blocks_fixed
void ff_imdct36_blocks_fixed(int *out, int *buf, int *in, int count, int switch_point, int block_type)
ff_init_mpadsp_tabs_fixed
void ff_init_mpadsp_tabs_fixed(void)
ff_mpa_synth_filter_fixed
void ff_mpa_synth_filter_fixed(MPADSPContext *s, int32_t *synth_buf_ptr, int *synth_buf_offset, int32_t *window, int *dither_state, int16_t *samples, ptrdiff_t incr, int32_t *sb_samples)
int32_t
int32_t
Definition: audio_convert.c:194
src
#define src
Definition: vp8dsp.c:254
ff_mpa_synth_init_fixed
void ff_mpa_synth_init_fixed(int32_t *window)
ff_mpa_enwindow
const int32_t ff_mpa_enwindow[257]
Definition: mpegaudiodsp_data.c:22
ff_mpadsp_apply_window_fixed
void ff_mpadsp_apply_window_fixed(int32_t *synth_buf, int32_t *window, int *dither_state, int16_t *samples, ptrdiff_t incr)
ff_mpadsp_init_arm
void ff_mpadsp_init_arm(MPADSPContext *s)
Definition: mpegaudiodsp_init_arm.c:31
MPADSPContext::dct32_float
void(* dct32_float)(float *dst, const float *src)
Definition: mpegaudiodsp.h:34
MPADSPContext::dct32_fixed
void(* dct32_fixed)(int *dst, const int *src)
Definition: mpegaudiodsp.h:35
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:326
ff_mpadsp_init_x86
void ff_mpadsp_init_x86(MPADSPContext *s)
Definition: mpegaudiodsp.c:242
common.h
ff_mpadsp_init_aarch64
void ff_mpadsp_init_aarch64(MPADSPContext *s)
Definition: mpegaudiodsp_init.c:32
ff_mpadsp_init
void ff_mpadsp_init(MPADSPContext *s)
Definition: mpegaudiodsp.c:31
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
ff_mpa_synth_filter_float
void ff_mpa_synth_filter_float(MPADSPContext *s, float *synth_buf_ptr, int *synth_buf_offset, float *window, int *dither_state, float *samples, ptrdiff_t incr, float *sb_samples)
ff_init_mpadsp_tabs_float
void ff_init_mpadsp_tabs_float(void)
MDCT_BUF_SIZE
#define MDCT_BUF_SIZE
For SSE implementation, MDCT_BUF_SIZE/2 should be 128-bit aligned.
Definition: mpegaudiodsp.h:89
ff_mpadsp_init_ppc
void ff_mpadsp_init_ppc(MPADSPContext *s)
Definition: mpegaudiodsp_altivec.c:133
MPADSPContext::apply_window_fixed
void(* apply_window_fixed)(int32_t *synth_buf, int32_t *window, int *dither_state, int16_t *samples, ptrdiff_t incr)
Definition: mpegaudiodsp.h:31
MPADSPContext::apply_window_float
void(* apply_window_float)(float *synth_buf, float *window, int *dither_state, float *samples, ptrdiff_t incr)
Definition: mpegaudiodsp.h:28
ff_mdct_win_float
float ff_mdct_win_float[8][MDCT_BUF_SIZE]
ff_mpa_synth_init_float
void ff_mpa_synth_init_float(float *window)
MPADSPContext::imdct36_blocks_fixed
void(* imdct36_blocks_fixed)(int *out, int *buf, int *in, int count, int switch_point, int block_type)
Definition: mpegaudiodsp.h:39