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libavcodec/aacenc.h

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00001 /*
00002  * AAC encoder
00003  * Copyright (C) 2008 Konstantin Shishkov
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #ifndef AVCODEC_AACENC_H
00023 #define AVCODEC_AACENC_H
00024 
00025 #include "avcodec.h"
00026 #include "put_bits.h"
00027 #include "dsputil.h"
00028 
00029 #include "aac.h"
00030 
00031 #include "psymodel.h"
00032 
00033 struct AACEncContext;
00034 
00035 typedef struct AACCoefficientsEncoder {
00036     void (*search_for_quantizers)(AVCodecContext *avctx, struct AACEncContext *s,
00037                                   SingleChannelElement *sce, const float lambda);
00038     void (*encode_window_bands_info)(struct AACEncContext *s, SingleChannelElement *sce,
00039                                      int win, int group_len, const float lambda);
00040     void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
00041                                      int scale_idx, int cb, const float lambda);
00042     void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
00043 } AACCoefficientsEncoder;
00044 
00045 extern AACCoefficientsEncoder ff_aac_coders[];
00046 
00050 typedef struct AACEncContext {
00051     PutBitContext pb;
00052     FFTContext mdct1024;                         
00053     FFTContext mdct128;                          
00054     DSPContext  dsp;
00055     DECLARE_ALIGNED(16, FFTSample, output)[2048]; 
00056     int16_t* samples;                            
00057 
00058     int samplerate_index;                        
00059 
00060     ChannelElement *cpe;                         
00061     FFPsyContext psy;
00062     struct FFPsyPreprocessContext* psypp;
00063     AACCoefficientsEncoder *coder;
00064     int cur_channel;
00065     int last_frame;
00066     float lambda;
00067     DECLARE_ALIGNED(16, int,   qcoefs)[96];      
00068     DECLARE_ALIGNED(16, float, scoefs)[1024];    
00069 } AACEncContext;
00070 
00071 #endif /* AVCODEC_AACENC_H */

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