X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;ds=sidebyside;f=lib%2Flame%2Fencoder.h;fp=lib%2Flame%2Fencoder.h;h=2fd2c19f2dc969fa3a0ad3725b967259a454705a;hb=698acf324aaa52147b1486646f6549ffd95804da;hp=0000000000000000000000000000000000000000;hpb=f8d07c79494e8536e682da73cee2057740a0e4db;p=swftools.git diff --git a/lib/lame/encoder.h b/lib/lame/encoder.h new file mode 100644 index 0000000..2fd2c19 --- /dev/null +++ b/lib/lame/encoder.h @@ -0,0 +1,148 @@ +/* + * encoder.h include file + * + * Copyright (c) 2000 Mark Taylor + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + + +#ifndef LAME_ENCODER_H +#define LAME_ENCODER_H + +/*********************************************************************** +* +* encoder and decoder delays +* +***********************************************************************/ + +/* + * layer III enc->dec delay: 1056 (1057?) (observed) + * layer II enc->dec delay: 480 (481?) (observed) + * + * polyphase 256-16 (dec or enc) = 240 + * mdct 256+32 (9*32) (dec or enc) = 288 + * total: 512+16 + * + * My guess is that delay of polyphase filterbank is actualy 240.5 + * (there are technical reasons for this, see postings in mp3encoder). + * So total Encode+Decode delay = ENCDELAY + 528 + 1 + */ + +/* + * ENCDELAY The encoder delay. + * + * Minimum allowed is MDCTDELAY (see below) + * + * The first 96 samples will be attenuated, so using a value less than 96 + * will result in corrupt data for the first 96-ENCDELAY samples. + * + * suggested: 576 + * set to 1160 to sync with FhG. + */ + +#define ENCDELAY 576 + + + +/* + * make sure there is at least one complete frame after the + * last frame containing real data + * + * Using a value of 288 would be sufficient for a + * a very sophisticated decoder that can decode granule-by-granule instead + * of frame by frame. But lets not assume this, and assume the decoder + * will not decode frame N unless it also has data for frame N+1 + * + */ +/*#define POSTDELAY 288*/ +#define POSTDELAY 1152 + + + +/* + * delay of the MDCT used in mdct.c + * original ISO routines had a delay of 528! + * Takehiro's routines: + */ + +#define MDCTDELAY 48 +#define FFTOFFSET (224+MDCTDELAY) + +/* + * Most decoders, including the one we use, have a delay of 528 samples. + */ + +#define DECDELAY 528 + + +/* number of subbands */ +#define SBLIMIT 32 + +/* parition bands bands */ +#define CBANDS 64 + +/* number of critical bands/scale factor bands where masking is computed*/ +#define SBPSY_l 21 +#define SBPSY_s 12 + +/* total number of scalefactor bands encoded */ +#define SBMAX_l 22 +#define SBMAX_s 13 + + + +/* FFT sizes */ +#define BLKSIZE 1024 +#define HBLKSIZE (BLKSIZE/2 + 1) +#define BLKSIZE_s 256 +#define HBLKSIZE_s (BLKSIZE_s/2 + 1) + + +/* #define switch_pe 1800 */ +#define NORM_TYPE 0 +#define START_TYPE 1 +#define SHORT_TYPE 2 +#define STOP_TYPE 3 + +/* + * Mode Extention: + * When we are in stereo mode, there are 4 possible methods to store these + * two channels. The stereo modes -m? are using a subset of them. + * + * -ms: MPG_MD_LR_LR + * -mj: MPG_MD_LR_LR and MPG_MD_MS_LR + * -mf: MPG_MD_MS_LR + * -mi: all + */ + +#define MPG_MD_LR_LR 0 +#define MPG_MD_LR_I 1 +#define MPG_MD_MS_LR 2 +#define MPG_MD_MS_I 3 + + +#include "machine.h" +#include "lame.h" + +int lame_encode_mp3_frame ( + lame_global_flags* const gfp, + sample_t* inbuf_l, + sample_t* inbuf_r, + unsigned char* mp3buf, + int mp3buf_size ); + +#endif /* LAME_ENCODER_H */