3 * Copyright (C) 2008 Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
22 #ifndef AVCODEC_AACENC_H
23 #define AVCODEC_AACENC_H
25 #include "libavutil/float_dsp.h"
31 #include "audio_frame_queue.h"
34 #define AAC_CODER_NB 4
36 typedef struct AACEncOptions {
43 typedef struct AACCoefficientsEncoder {
44 void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
45 SingleChannelElement *sce, const float lambda);
46 void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
47 int win, int group_len, const float lambda);
48 void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
49 int scale_idx, int cb, const float lambda);
50 void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
51 } AACCoefficientsEncoder;
53 extern AACCoefficientsEncoder ff_aac_coders[];
58 typedef struct AACEncContext {
60 AACEncOptions options; ///< encoding options
62 FFTContext mdct1024; ///< long (1024 samples) frame transform context
63 FFTContext mdct128; ///< short (128 samples) frame transform context
64 AVFloatDSPContext fdsp;
65 float *planar_samples[6]; ///< saved preprocessed input
67 int samplerate_index; ///< MPEG-4 samplerate index
68 int channels; ///< channel count
69 const uint8_t *chan_map; ///< channel configuration map
71 ChannelElement *cpe; ///< channel elements
73 struct FFPsyPreprocessContext* psypp;
74 AACCoefficientsEncoder *coder;
79 DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients
80 DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients
87 extern float ff_aac_pow34sf_tab[428];
89 #endif /* AVCODEC_AACENC_H */