Initial community commit

Src/external_dependencies/openmpt-trunk/include/lame/libmp3lame/encoder.h

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+/*
+ *      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
+#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
+ */
+#if 0
+#define MPG_MD_LR_LR  0
+#define MPG_MD_LR_I   1
+#define MPG_MD_MS_LR  2
+#define MPG_MD_MS_I   3
+#endif
+enum MPEGChannelMode
+{   MPG_MD_LR_LR = 0
+,   MPG_MD_LR_I  = 1
+,   MPG_MD_MS_LR = 2
+,   MPG_MD_MS_I  = 3
+};
+
+#ifndef lame_internal_flags_defined
+#define lame_internal_flags_defined
+struct lame_internal_flags;
+typedef struct lame_internal_flags lame_internal_flags;
+#endif
+
+int     lame_encode_mp3_frame(lame_internal_flags * gfc,
+                              sample_t const *inbuf_l,
+                              sample_t const *inbuf_r, unsigned char *mp3buf, int mp3buf_size);
+
+#endif /* LAME_ENCODER_H */