| 1 | //mixer.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2013 |
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| 5 | * |
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| 6 | * This file is part of roard 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 | * RoarAudio 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, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | */ |
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| 25 | |
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| 26 | #include "roard.h" |
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| 27 | |
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| 28 | int need_vol_change (int channels, struct roar_mixer_settings * set) { |
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| 29 | int i; |
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| 30 | |
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| 31 | if ( set == NULL || channels < 1 || channels > ROAR_MAX_CHANNELS ) |
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| 32 | return -1; |
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| 33 | |
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| 34 | if ( set->rpg_mul != set->rpg_div ) |
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| 35 | return 1; |
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| 36 | |
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| 37 | for (i = 0; i < channels; i++) |
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| 38 | if ( set->mixer[i] != set->scale ) |
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| 39 | return 1; |
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| 40 | |
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| 41 | return 0; |
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| 42 | } |
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| 43 | |
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| 44 | #define _err() streams_delete(stream); return -1 |
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| 45 | int add_mixer (int subsys, char * name, struct roar_stream_server ** ss_ptr) { |
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| 46 | struct roar_stream_server * ss; |
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| 47 | int stream; |
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| 48 | |
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| 49 | if ( (stream = streams_new()) == -1 ) |
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| 50 | return -1; |
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| 51 | |
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| 52 | if ( streams_get(stream, &ss) == -1 ) { |
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| 53 | _err(); |
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| 54 | } |
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| 55 | |
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| 56 | if ( streams_set_name(stream, name) == -1 ) { |
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| 57 | _err(); |
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| 58 | } |
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| 59 | |
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| 60 | if ( client_stream_add(g_self_client, stream) == -1 ) { |
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| 61 | _err(); |
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| 62 | } |
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| 63 | |
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| 64 | if ( streams_set_dir(stream, ROAR_DIR_MIXING, 1) == -1 ) { |
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| 65 | _err(); |
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| 66 | } |
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| 67 | |
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| 68 | // the mixers are the most sync thing we have... |
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| 69 | if ( streams_set_rawflag(stream, ROAR_FLAG_SYNC) == -1 ) { |
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| 70 | _err(); |
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| 71 | } |
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| 72 | |
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| 73 | if ( streams_set_flag(stream, ROAR_FLAG_IMMUTABLE) == -1 ) { |
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| 74 | _err(); |
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| 75 | } |
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| 76 | |
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| 77 | switch (subsys) { |
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| 78 | case ROAR_SUBSYS_WAVEFORM: |
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| 79 | ss->delay = _MEGA/ROAR_OUTPUT_CFREQ; |
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| 80 | break; |
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| 81 | } |
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| 82 | |
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| 83 | if ( ss_ptr != NULL ) |
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| 84 | *ss_ptr = ss; |
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| 85 | |
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| 86 | return stream; |
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| 87 | } |
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| 88 | |
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| 89 | //ll |
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