| 1 | //swap.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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| 5 | * |
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| 6 | * This file is part of libroardsp a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroardsp is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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| 25 | #include "libroardsp.h" |
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| 26 | |
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| 27 | int roardsp_swap_init (struct roardsp_filter * filter, struct roar_stream * stream, int id) { |
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| 28 | struct roardsp_swap * inst = roar_mm_malloc(sizeof(struct roardsp_swap)); |
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| 29 | |
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| 30 | ROAR_DBG("roardsp_swap_init(*): inst=%p", inst); |
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| 31 | |
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| 32 | if ( inst == NULL ) { |
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| 33 | ROAR_ERR("roardsp_swap_init(*): Can not alloc memory for filter swap: %s", strerror(errno)); |
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| 34 | filter->inst = NULL; |
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| 35 | return -1; |
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| 36 | } |
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| 37 | |
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| 38 | filter->inst = inst; |
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| 39 | |
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| 40 | return roardsp_swap_reset(filter, ROARDSP_RESET_FULL); |
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| 41 | } |
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| 42 | |
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| 43 | int roardsp_swap_uninit (struct roardsp_filter * filter) { |
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| 44 | if ( filter == NULL ) |
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| 45 | return -1; |
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| 46 | |
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| 47 | if ( filter->inst == NULL ) |
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| 48 | return -1; |
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| 49 | |
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| 50 | roar_mm_free(filter->inst); |
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| 51 | |
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| 52 | return 0; |
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| 53 | } |
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| 54 | |
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| 55 | int roardsp_swap_calc162(struct roardsp_filter * filter, void * data, size_t samples) { |
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| 56 | int16_t * d = data; |
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| 57 | register int16_t s; |
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| 58 | int i; |
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| 59 | |
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| 60 | for (i = 0; i < samples; i += 2) { |
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| 61 | ROAR_DBG("roardsp_swap_calc162(*): d[i]=%i, d[i+1]=%i", d[i], d[i+1]); |
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| 62 | s = d[i]; |
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| 63 | d[i] = d[i+1]; |
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| 64 | d[i+1] = s; |
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| 65 | } |
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| 66 | |
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| 67 | return 0; |
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| 68 | } |
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| 69 | |
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| 70 | int roardsp_swap_ctl (struct roardsp_filter * filter, int cmd, void * data) { |
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| 71 | return -1; |
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| 72 | } |
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| 73 | |
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| 74 | int roardsp_swap_reset (struct roardsp_filter * filter, int what) { |
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| 75 | struct roardsp_swap * inst = NULL; |
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| 76 | int i; |
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| 77 | |
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| 78 | if ( filter == NULL ) |
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| 79 | return -1; |
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| 80 | |
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| 81 | if ( (inst = filter->inst) == NULL ) |
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| 82 | return -1; |
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| 83 | |
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| 84 | switch (what) { |
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| 85 | case ROARDSP_RESET_NONE: |
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| 86 | case ROARDSP_RESET_STATE: |
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| 87 | return 0; |
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| 88 | break; |
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| 89 | case ROARDSP_RESET_FULL: |
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| 90 | memset(inst, 0, sizeof(struct roardsp_swap)); |
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| 91 | |
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| 92 | for (i = 0; i < ROAR_MAX_CHANNELS; i++) |
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| 93 | inst->map[i] = i; |
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| 94 | |
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| 95 | inst->map[0] = 1; |
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| 96 | inst->map[1] = 0; |
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| 97 | return 0; |
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| 98 | break; |
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| 99 | default: |
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| 100 | return -1; |
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| 101 | } |
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| 102 | |
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| 103 | return -1; |
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| 104 | } |
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| 105 | |
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| 106 | //ll |
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