1/*
2 * AAC encoder
3 * Copyright (C) 2008 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_AACENC_H
23#define AVCODEC_AACENC_H
24
25#include "libavutil/float_dsp.h"
26#include "avcodec.h"
27#include "put_bits.h"
28
29#include "aac.h"
30#include "audio_frame_queue.h"
31#include "psymodel.h"
32
33typedef enum AACCoder {
34    AAC_CODER_FAAC = 0,
35    AAC_CODER_ANMR,
36    AAC_CODER_TWOLOOP,
37    AAC_CODER_FAST,
38
39    AAC_CODER_NB,
40}AACCoder;
41
42typedef struct AACEncOptions {
43    int stereo_mode;
44    int aac_coder;
45} AACEncOptions;
46
47struct AACEncContext;
48
49typedef struct AACCoefficientsEncoder {
50    void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
51                                  SingleChannelElement *sce, const float lambda);
52    void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
53                                     int win, int group_len, const float lambda);
54    void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
55                                     int scale_idx, int cb, const float lambda);
56    void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
57} AACCoefficientsEncoder;
58
59extern AACCoefficientsEncoder ff_aac_coders[];
60
61/**
62 * AAC encoder context
63 */
64typedef struct AACEncContext {
65    AVClass *av_class;
66    AACEncOptions options;                       ///< encoding options
67    PutBitContext pb;
68    FFTContext mdct1024;                         ///< long (1024 samples) frame transform context
69    FFTContext mdct128;                          ///< short (128 samples) frame transform context
70    AVFloatDSPContext fdsp;
71    float *planar_samples[6];                    ///< saved preprocessed input
72
73    int samplerate_index;                        ///< MPEG-4 samplerate index
74    int channels;                                ///< channel count
75    const uint8_t *chan_map;                     ///< channel configuration map
76
77    ChannelElement *cpe;                         ///< channel elements
78    FFPsyContext psy;
79    struct FFPsyPreprocessContext* psypp;
80    AACCoefficientsEncoder *coder;
81    int cur_channel;
82    int last_frame;
83    float lambda;
84    AudioFrameQueue afq;
85    DECLARE_ALIGNED(16, int,   qcoefs)[96];      ///< quantized coefficients
86    DECLARE_ALIGNED(32, float, scoefs)[1024];    ///< scaled coefficients
87
88    struct {
89        float *samples;
90    } buffer;
91} AACEncContext;
92
93extern float ff_aac_pow34sf_tab[428];
94
95void ff_aac_coder_init_mips(AACEncContext *c);
96
97#endif /* AVCODEC_AACENC_H */
98