| /* |
| * 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 Lesser 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 Lesser 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 |
| #define PSFB21 6 |
| #define PSFB12 6 |
| |
| |
| |
| /* 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 |
| |
| |
| int lame_encode_mp3_frame(lame_global_flags * const gfp, |
| sample_t const *inbuf_l, |
| sample_t const *inbuf_r, unsigned char *mp3buf, int mp3buf_size); |
| |
| #endif /* LAME_ENCODER_H */ |
