3 * Copyright (C) 2008 Konstantin Shishkov
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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
30 #include "audio_frame_queue.h"
33 typedef struct AACEncOptions {
39 typedef struct AACCoefficientsEncoder {
40 void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
41 SingleChannelElement *sce, const float lambda);
42 void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
43 int win, int group_len, const float lambda);
44 void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
45 int scale_idx, int cb, const float lambda);
46 void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
47 } AACCoefficientsEncoder;
49 extern AACCoefficientsEncoder ff_aac_coders[];
54 typedef struct AACEncContext {
56 AACEncOptions options; ///< encoding options
58 FFTContext mdct1024; ///< long (1024 samples) frame transform context
59 FFTContext mdct128; ///< short (128 samples) frame transform context
61 float *planar_samples[6]; ///< saved preprocessed input
63 int samplerate_index; ///< MPEG-4 samplerate index
64 int channels; ///< channel count
65 const uint8_t *chan_map; ///< channel configuration map
67 ChannelElement *cpe; ///< channel elements
69 struct FFPsyPreprocessContext* psypp;
70 AACCoefficientsEncoder *coder;
75 DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients
76 DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients
83 extern float ff_aac_pow34sf_tab[428];
85 #endif /* AVCODEC_AACENC_H */