aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/aacenc.h
blob: d8bed82abe7c789f46294635c71bcdd90e135679 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
 * AAC encoder
 * Copyright (C) 2008 Konstantin Shishkov
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_AACENC_H
#define AVCODEC_AACENC_H

#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "put_bits.h"

#include "aac.h"
#include "audio_frame_queue.h"
#include "psymodel.h"

#include "lpc.h"

typedef enum AACCoder {
    AAC_CODER_FAAC = 0,
    AAC_CODER_ANMR,
    AAC_CODER_TWOLOOP,
    AAC_CODER_FAST,

    AAC_CODER_NB,
}AACCoder;

typedef struct AACEncOptions {
    int coder;
    int pns;
    int tns;
    int ltp;
    int pred;
    int mid_side;
    int intensity_stereo;
} AACEncOptions;

struct AACEncContext;

typedef struct AACCoefficientsEncoder {
    void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
                                  SingleChannelElement *sce, const float lambda);
    void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
                                     int win, int group_len, const float lambda);
    void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size,
                                     int scale_idx, int cb, const float lambda, int rtz);
    void (*encode_tns_info)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*encode_ltp_info)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
    void (*encode_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*adjust_common_pred)(struct AACEncContext *s, ChannelElement *cpe);
    void (*adjust_common_ltp)(struct AACEncContext *s, ChannelElement *cpe);
    void (*apply_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*apply_tns_filt)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*update_ltp)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*ltp_insert_new_frame)(struct AACEncContext *s);
    void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
    void (*mark_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
    void (*search_for_tns)(struct AACEncContext *s, SingleChannelElement *sce);
    void (*search_for_ltp)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);
    void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe);
    void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
    void (*search_for_pred)(struct AACEncContext *s, SingleChannelElement *sce);
} AACCoefficientsEncoder;

extern AACCoefficientsEncoder ff_aac_coders[];

typedef struct AACQuantizeBandCostCacheEntry {
    float rd;
    float energy;
    int bits; ///< -1 means uninitialized entry
    char cb;
    char rtz;
    char padding[2]; ///< Keeps the entry size a multiple of 32 bits
} AACQuantizeBandCostCacheEntry;

/**
 * AAC encoder context
 */
typedef struct AACEncContext {
    AVClass *av_class;
    AACEncOptions options;                       ///< encoding options
    PutBitContext pb;
    FFTContext mdct1024;                         ///< long (1024 samples) frame transform context
    FFTContext mdct128;                          ///< short (128 samples) frame transform context
    AVFloatDSPContext *fdsp;
    float *planar_samples[8];                    ///< saved preprocessed input

    int profile;                                 ///< copied from avctx
    LPCContext lpc;                              ///< used by TNS
    int samplerate_index;                        ///< MPEG-4 samplerate index
    int channels;                                ///< channel count
    const uint8_t *chan_map;                     ///< channel configuration map

    ChannelElement *cpe;                         ///< channel elements
    FFPsyContext psy;
    struct FFPsyPreprocessContext* psypp;
    AACCoefficientsEncoder *coder;
    int cur_channel;                             ///< current channel for coder context
    int last_frame;
    int random_state;
    float lambda;
    float lambda_sum;                            ///< sum(lambda), for Qvg reporting
    int lambda_count;                            ///< count(lambda), for Qvg reporting
    enum RawDataBlockType cur_type;              ///< channel group type cur_channel belongs to

    AudioFrameQueue afq;
    DECLARE_ALIGNED(16, int,   qcoefs)[96];      ///< quantized coefficients
    DECLARE_ALIGNED(32, float, scoefs)[1024];    ///< scaled coefficients

    AACQuantizeBandCostCacheEntry quantize_band_cost_cache[256][128]; ///< memoization area for quantize_band_cost

    struct {
        float *samples;
    } buffer;
} AACEncContext;

void ff_aac_coder_init_mips(AACEncContext *c);
void ff_quantize_band_cost_cache_init(struct AACEncContext *s);


#endif /* AVCODEC_AACENC_H */