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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 | ||
33 | typedef 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 | ||
42 | typedef struct AACEncOptions { | |
43 | int stereo_mode; | |
44 | int aac_coder; | |
45 | } AACEncOptions; | |
46 | ||
47 | struct AACEncContext; | |
48 | ||
49 | typedef 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 | ||
59 | extern AACCoefficientsEncoder ff_aac_coders[]; | |
60 | ||
61 | /** | |
62 | * AAC encoder context | |
63 | */ | |
64 | typedef 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 | |
f6fa7814 | 70 | AVFloatDSPContext *fdsp; |
2ba45a60 DM |
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 | ||
93 | extern float ff_aac_pow34sf_tab[428]; | |
94 | ||
95 | void ff_aac_coder_init_mips(AACEncContext *c); | |
96 | ||
97 | #endif /* AVCODEC_AACENC_H */ |