| 1 | //filter_agc.c: |
|---|
| 2 | |
|---|
| 3 | /* |
|---|
| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2010 |
|---|
| 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, 51 Franklin Street, Fifth Floor, |
|---|
| 22 | * Boston, MA 02110-1301, USA. |
|---|
| 23 | * |
|---|
| 24 | */ |
|---|
| 25 | |
|---|
| 26 | #include "libroardsp.h" |
|---|
| 27 | |
|---|
| 28 | int roardsp_agc_init (struct roardsp_filter * filter, struct roar_stream * stream, int id) { |
|---|
| 29 | struct roardsp_agc * self = roar_mm_malloc(sizeof(struct roardsp_agc)); |
|---|
| 30 | |
|---|
| 31 | if ( self == NULL ) |
|---|
| 32 | return -1; |
|---|
| 33 | |
|---|
| 34 | memset(self, 0, sizeof(struct roardsp_agc)); |
|---|
| 35 | |
|---|
| 36 | if ( roardsp_filter_new(&(self->amp), stream, ROARDSP_FILTER_AMP) == -1 ) { |
|---|
| 37 | roar_mm_free(self); |
|---|
| 38 | return -1; |
|---|
| 39 | } |
|---|
| 40 | |
|---|
| 41 | filter->inst = (void*) self; |
|---|
| 42 | |
|---|
| 43 | if ( roardsp_filter_reset(filter, ROARDSP_RESET_FULL) == -1 ) { |
|---|
| 44 | roardsp_agc_uninit(filter); |
|---|
| 45 | return -1; |
|---|
| 46 | } |
|---|
| 47 | |
|---|
| 48 | return 0; |
|---|
| 49 | } |
|---|
| 50 | |
|---|
| 51 | int roardsp_agc_uninit (struct roardsp_filter * filter) { |
|---|
| 52 | struct roardsp_agc * self = filter->inst; |
|---|
| 53 | |
|---|
| 54 | roardsp_filter_free(self->amp); |
|---|
| 55 | roar_mm_free(self); |
|---|
| 56 | return 0; |
|---|
| 57 | } |
|---|
| 58 | |
|---|
| 59 | int roardsp_agc_ctl (struct roardsp_filter * filter, int cmd, void * data) { |
|---|
| 60 | struct roardsp_agc * self = filter->inst; |
|---|
| 61 | |
|---|
| 62 | (void)self; |
|---|
| 63 | |
|---|
| 64 | return -1; |
|---|
| 65 | } |
|---|
| 66 | |
|---|
| 67 | int roardsp_agc_reset (struct roardsp_filter * filter, int what) { |
|---|
| 68 | struct roardsp_agc * self = filter->inst; |
|---|
| 69 | |
|---|
| 70 | switch (what) { |
|---|
| 71 | case ROARDSP_RESET_NONE: |
|---|
| 72 | return 0; |
|---|
| 73 | break; |
|---|
| 74 | case ROARDSP_RESET_FULL: |
|---|
| 75 | if ( filter->bits < 4 ) |
|---|
| 76 | return -1; |
|---|
| 77 | |
|---|
| 78 | self->target_amp = 1 << (filter->bits - 3); |
|---|
| 79 | |
|---|
| 80 | if ( roardsp_filter_reset(self->amp, ROARDSP_RESET_FULL) == -1 ) |
|---|
| 81 | return -1; |
|---|
| 82 | |
|---|
| 83 | return -1; |
|---|
| 84 | break; |
|---|
| 85 | case ROARDSP_RESET_STATE: |
|---|
| 86 | if ( roardsp_filter_reset(self->amp, ROARDSP_RESET_STATE) == -1 ) |
|---|
| 87 | return -1; |
|---|
| 88 | return -1; |
|---|
| 89 | break; |
|---|
| 90 | default: return -1; |
|---|
| 91 | } |
|---|
| 92 | |
|---|
| 93 | return 0; |
|---|
| 94 | } |
|---|
| 95 | |
|---|
| 96 | //ll |
|---|
