[2434] | 1 | //fader.c: |
---|
| 2 | |
---|
| 3 | /* |
---|
| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
---|
| 5 | * |
---|
| 6 | * This file is part of libroardsp a part of RoarAudio, |
---|
| 7 | * a cross-platform sound system for both, home and professional use. |
---|
| 8 | * See README for details. |
---|
| 9 | * |
---|
| 10 | * This file is free software; you can redistribute it and/or modify |
---|
| 11 | * it under the terms of the GNU General Public License version 3 |
---|
| 12 | * as published by the Free Software Foundation. |
---|
| 13 | * |
---|
| 14 | * libroardsp is distributed in the hope that it will be useful, |
---|
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 17 | * GNU General Public License for more details. |
---|
| 18 | * |
---|
| 19 | * You should have received a copy of the GNU General Public License |
---|
| 20 | * along with this software; see the file COPYING. If not, write to |
---|
| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
---|
| 22 | * |
---|
| 23 | */ |
---|
| 24 | |
---|
| 25 | #include "libroardsp.h" |
---|
| 26 | |
---|
[2438] | 27 | #define _CHECK_BASIC() if ( state == NULL ) return -1 |
---|
| 28 | #define _CHECK_CALCPCM() _CHECK_BASIC(); if ( frames == 0 ) return 0; if ( data == NULL ) return -1; |
---|
| 29 | |
---|
| 30 | int roar_fader_init (struct roar_fader_state * state, float * poly, int coeff) { |
---|
| 31 | _CHECK_BASIC(); |
---|
| 32 | |
---|
| 33 | if ( poly == NULL ) |
---|
| 34 | return -1; |
---|
| 35 | |
---|
| 36 | if ( coeff < 2 ) |
---|
| 37 | return -1; |
---|
| 38 | |
---|
| 39 | if ( coeff > ROAR_FADER_MAX_COEFF ) |
---|
| 40 | return -1; |
---|
| 41 | |
---|
| 42 | memset(state, 0, sizeof(struct roar_fader_state)); |
---|
| 43 | |
---|
| 44 | state->rate = -1; |
---|
| 45 | state->coeff = coeff; |
---|
| 46 | |
---|
[2440] | 47 | state->start = -1; |
---|
| 48 | state->stop = -1; |
---|
| 49 | |
---|
[2438] | 50 | memcpy(&(state->poly), poly, sizeof(float)*coeff); |
---|
| 51 | |
---|
| 52 | return 0; |
---|
| 53 | } |
---|
| 54 | |
---|
| 55 | int roar_fader_set_rate (struct roar_fader_state * state, int rate) { |
---|
| 56 | _CHECK_BASIC(); |
---|
| 57 | |
---|
| 58 | state->rate = rate; |
---|
| 59 | |
---|
| 60 | return 0; |
---|
| 61 | } |
---|
| 62 | |
---|
| 63 | int roar_fader_set_startstop(struct roar_fader_state * state, ssize_t start, ssize_t stop) { |
---|
| 64 | _CHECK_BASIC(); |
---|
| 65 | |
---|
| 66 | if ( start >= 0 ) |
---|
| 67 | state->start = start; |
---|
| 68 | |
---|
| 69 | if ( stop >= 0 ) |
---|
| 70 | state->stop = stop; |
---|
| 71 | |
---|
| 72 | return 0; |
---|
| 73 | } |
---|
| 74 | |
---|
| 75 | int roar_fader_calcpcm_i16n(struct roar_fader_state * state, int16_t * data, size_t frames, int channels) { |
---|
| 76 | _CHECK_CALCPCM(); |
---|
| 77 | |
---|
| 78 | switch (channels) { |
---|
| 79 | case 1: return roar_fader_calcpcm_i161(state, data, frames); |
---|
| 80 | } |
---|
| 81 | |
---|
| 82 | return -1; |
---|
| 83 | } |
---|
| 84 | |
---|
| 85 | int roar_fader_calcpcm_i161(struct roar_fader_state * state, int16_t * data, size_t frames) { |
---|
| 86 | return -1; |
---|
| 87 | } |
---|
[2434] | 88 | |
---|
| 89 | //ll |
---|