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