yading@10: /*
yading@10:  * AAC encoder
yading@10:  * Copyright (C) 2008 Konstantin Shishkov
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_AACENC_H
yading@10: #define AVCODEC_AACENC_H
yading@10: 
yading@10: #include "libavutil/float_dsp.h"
yading@10: #include "avcodec.h"
yading@10: #include "put_bits.h"
yading@10: 
yading@10: #include "aac.h"
yading@10: #include "audio_frame_queue.h"
yading@10: #include "psymodel.h"
yading@10: 
yading@10: #define AAC_CODER_NB 4
yading@10: 
yading@10: typedef struct AACEncOptions {
yading@10:     int stereo_mode;
yading@10:     int aac_coder;
yading@10: } AACEncOptions;
yading@10: 
yading@10: struct AACEncContext;
yading@10: 
yading@10: typedef struct AACCoefficientsEncoder {
yading@10:     void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
yading@10:                                   SingleChannelElement *sce, const float lambda);
yading@10:     void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
yading@10:                                      int win, int group_len, const float lambda);
yading@10:     void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
yading@10:                                      int scale_idx, int cb, const float lambda);
yading@10:     void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
yading@10: } AACCoefficientsEncoder;
yading@10: 
yading@10: extern AACCoefficientsEncoder ff_aac_coders[];
yading@10: 
yading@10: /**
yading@10:  * AAC encoder context
yading@10:  */
yading@10: typedef struct AACEncContext {
yading@10:     AVClass *av_class;
yading@10:     AACEncOptions options;                       ///< encoding options
yading@10:     PutBitContext pb;
yading@10:     FFTContext mdct1024;                         ///< long (1024 samples) frame transform context
yading@10:     FFTContext mdct128;                          ///< short (128 samples) frame transform context
yading@10:     AVFloatDSPContext fdsp;
yading@10:     float *planar_samples[6];                    ///< saved preprocessed input
yading@10: 
yading@10:     int samplerate_index;                        ///< MPEG-4 samplerate index
yading@10:     int channels;                                ///< channel count
yading@10:     const uint8_t *chan_map;                     ///< channel configuration map
yading@10: 
yading@10:     ChannelElement *cpe;                         ///< channel elements
yading@10:     FFPsyContext psy;
yading@10:     struct FFPsyPreprocessContext* psypp;
yading@10:     AACCoefficientsEncoder *coder;
yading@10:     int cur_channel;
yading@10:     int last_frame;
yading@10:     float lambda;
yading@10:     AudioFrameQueue afq;
yading@10:     DECLARE_ALIGNED(16, int,   qcoefs)[96];      ///< quantized coefficients
yading@10:     DECLARE_ALIGNED(32, float, scoefs)[1024];    ///< scaled coefficients
yading@10: 
yading@10:     struct {
yading@10:         float *samples;
yading@10:     } buffer;
yading@10: } AACEncContext;
yading@10: 
yading@10: extern float ff_aac_pow34sf_tab[428];
yading@10: 
yading@10: void ff_aac_coder_init_mips(AACEncContext *c);
yading@10: 
yading@10: #endif /* AVCODEC_AACENC_H */