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562
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1 /*
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2 decode.h: common definitions for decode functions
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3
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4 copyright 2007 by the mpg123 project - free software under the terms of the LGPL 2.1
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5 see COPYING and AUTHORS files in distribution or http://mpg123.org
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6 initially written by Thomas Orgis, taking WRITE_SAMPLE from decode.c
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7 */
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8 #ifndef MPG123_DECODE_H
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9 #define MPG123_DECODE_H
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10
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11 #ifdef FLOATOUT
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12 #define WRITE_SAMPLE(samples,sum,clip) *(samples) = sum
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13 #define sample_t float
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14 #else
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15 #define WRITE_SAMPLE(samples,sum,clip) \
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16 if( (sum) > REAL_PLUS_32767) { *(samples) = 0x7fff; (clip)++; } \
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17 else if( (sum) < REAL_MINUS_32768) { *(samples) = -0x8000; (clip)++; } \
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18 else { *(samples) = REAL_TO_SHORT(sum); }
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19 #define sample_t short
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20 #endif
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21
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22 #define NTOM_MAX 8 /* maximum allowed factor for upsampling */
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23 #define NTOM_MAX_FREQ 96000 /* maximum frequency to upsample to / downsample from */
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24 #define NTOM_MUL (32768)
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25
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26 /* synth_1to1 in optimize.h, one should also use opts for these here... */
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27
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28 int synth_2to1 (real *,int, mpg123_handle*, int);
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29 int synth_2to1_8bit (real *,int, mpg123_handle *,int);
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30 int synth_2to1_mono (real *, mpg123_handle *);
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31 int synth_2to1_mono2stereo (real *, mpg123_handle *);
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32 int synth_2to1_8bit_mono (real *, mpg123_handle *);
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33 int synth_2to1_8bit_mono2stereo (real *, mpg123_handle *);
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34
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35 int synth_4to1 (real *,int, mpg123_handle*, int);
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36 int synth_4to1_8bit (real *,int, mpg123_handle *,int);
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37 int synth_4to1_mono (real *, mpg123_handle *);
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38 int synth_4to1_mono2stereo (real *, mpg123_handle *);
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39 int synth_4to1_8bit_mono (real *, mpg123_handle *);
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40 int synth_4to1_8bit_mono2stereo (real *, mpg123_handle *);
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41
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42 int synth_ntom (real *,int, mpg123_handle*, int);
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43 int synth_ntom_8bit (real *,int, mpg123_handle *,int);
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44 int synth_ntom_mono (real *, mpg123_handle *);
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45 int synth_ntom_mono2stereo (real *, mpg123_handle *);
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46 int synth_ntom_8bit_mono (real *, mpg123_handle *);
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47 int synth_ntom_8bit_mono2stereo (real *, mpg123_handle *);
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48
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49 int synth_ntom_set_step(mpg123_handle *fr); /* prepare ntom decoding */
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50 unsigned long ntom_val(mpg123_handle *fr, off_t frame); /* compute ntom_val for frame offset */
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51
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52 off_t ntom_frmouts(mpg123_handle *fr, off_t frame);
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53 off_t ntom_ins2outs(mpg123_handle *fr, off_t ins);
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54 off_t ntom_frameoff(mpg123_handle *fr, off_t soff);
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55
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56 void init_layer3(void);
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57 void init_layer3_stuff(mpg123_handle *fr);
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58 void init_layer2(void);
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59 void init_layer2_stuff(mpg123_handle *fr);
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60 int make_conv16to8_table(mpg123_handle *fr);
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61
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62 int do_layer3(mpg123_handle *fr);
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63 int do_layer2(mpg123_handle *fr);
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64 int do_layer1(mpg123_handle *fr);
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65 void do_equalizer(real *bandPtr,int channel, real equalizer[2][32]);
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66
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67 #endif
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