/*
  * AAC encoder
  * Copyright (C) 2008 Konstantin Shishkov
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVCODEC_AACENC_H
 #define AVCODEC_AACENC_H
 

 #include "libavutil/float_dsp.h"

 #include "avcodec.h"
 #include "put_bits.h"
 
 #include "aac.h"

 #include "audio_frame_queue.h"

 #include "psymodel.h"
 

 #include "lpc.h"
 

 typedef enum AACCoder {

     AAC_CODER_ANMR = 0,

     AAC_CODER_TWOLOOP,
     AAC_CODER_FAST,

     AAC_CODER_NB,
 }AACCoder;

 typedef struct AACEncOptions {

     int coder;

     int pns;

     int tns;

     int ltp;

     int pred;

     int mid_side;

     int intensity_stereo;

 } AACEncOptions;
 

 struct AACEncContext;
 

 typedef struct AACCoefficientsEncoder {

     void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
                                   SingleChannelElement *sce, const float lambda);
     void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
                                      int win, int group_len, const float lambda);

     void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, float *out, int size,

                                      int scale_idx, int cb, const float lambda, int rtz);

     void (*encode_tns_info)(struct AACEncContext *s, SingleChannelElement *sce);

     void (*encode_ltp_info)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);

     void (*encode_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);

     void (*adjust_common_pred)(struct AACEncContext *s, ChannelElement *cpe);

     void (*adjust_common_ltp)(struct AACEncContext *s, ChannelElement *cpe);

     void (*apply_main_pred)(struct AACEncContext *s, SingleChannelElement *sce);

     void (*apply_tns_filt)(struct AACEncContext *s, SingleChannelElement *sce);

     void (*update_ltp)(struct AACEncContext *s, SingleChannelElement *sce);
     void (*ltp_insert_new_frame)(struct AACEncContext *s);

     void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce);

     void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);

     void (*mark_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);

     void (*search_for_tns)(struct AACEncContext *s, SingleChannelElement *sce);

     void (*search_for_ltp)(struct AACEncContext *s, SingleChannelElement *sce, int common_window);

     void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe);
     void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);

     void (*search_for_pred)(struct AACEncContext *s, SingleChannelElement *sce);

 } AACCoefficientsEncoder;

 extern const AACCoefficientsEncoder ff_aac_coders[];

 typedef struct AACQuantizeBandCostCacheEntry {
     float rd;
     float energy;

     int bits;

     char cb;
     char rtz;

     uint16_t generation;

 } AACQuantizeBandCostCacheEntry;
 

 /**
  * AAC encoder context
  */
 typedef struct AACEncContext {

     AVClass *av_class;
     AACEncOptions options;                       ///< encoding options

     PutBitContext pb;

     FFTContext mdct1024;                         ///< long (1024 samples) frame transform context
     FFTContext mdct128;                          ///< short (128 samples) frame transform context

     AVFloatDSPContext *fdsp;

     float *planar_samples[8];                    ///< saved preprocessed input

     int profile;                                 ///< copied from avctx

     LPCContext lpc;                              ///< used by TNS

     int samplerate_index;                        ///< MPEG-4 samplerate index

     int channels;                                ///< channel count

     const uint8_t *chan_map;                     ///< channel configuration map

 
     ChannelElement *cpe;                         ///< channel elements
     FFPsyContext psy;
     struct FFPsyPreprocessContext* psypp;

     const AACCoefficientsEncoder *coder;

     int cur_channel;                             ///< current channel for coder context

     int random_state;

     float lambda;

     int last_frame_pb_count;                     ///< number of bits for the previous frame

     float lambda_sum;                            ///< sum(lambda), for Qvg reporting
     int lambda_count;                            ///< count(lambda), for Qvg reporting

     enum RawDataBlockType cur_type;              ///< channel group type cur_channel belongs to
 

     AudioFrameQueue afq;

     DECLARE_ALIGNED(16, int,   qcoefs)[96];      ///< quantized coefficients

     DECLARE_ALIGNED(32, float, scoefs)[1024];    ///< scaled coefficients

     uint16_t quantize_band_cost_cache_generation;

     AACQuantizeBandCostCacheEntry quantize_band_cost_cache[256][128]; ///< memoization area for quantize_band_cost
 

     void (*abs_pow34)(float *out, const float *in, const int size);
     void (*quant_bands)(int *out, const float *in, const float *scaled,
                         int size, int is_signed, int maxval, const float Q34,
                         const float rounding);
 

     struct {
         float *samples;
     } buffer;

 } AACEncContext;
 

 void ff_aac_dsp_init_x86(AACEncContext *s);

 void ff_aac_coder_init_mips(AACEncContext *c);

 void ff_quantize_band_cost_cache_init(struct AACEncContext *s);
 

 #endif /* AVCODEC_AACENC_H */