| 1 | //driver_dmx.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 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, 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 "roard.h" |
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| 26 | |
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| 27 | int driver_dmx_open_vio (struct roar_vio_calls * inst, char * device, struct roar_audio_info * info, int fh) { |
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| 28 | |
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| 29 | if ( fh == -1 ) { |
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| 30 | if ( device == NULL ) |
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| 31 | device = getenv("DMX"); |
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| 32 | |
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| 33 | if ( device == NULL ) |
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| 34 | device = "/dev/dmx"; |
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| 35 | |
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| 36 | if ( roar_vio_open_file(inst, device, O_WRONLY, 0644) == -1 ) |
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| 37 | return -1; |
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| 38 | } else { |
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| 39 | if ( roar_vio_open_fh(inst, fh) == -1 ) |
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| 40 | return -1; |
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| 41 | } |
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| 42 | |
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| 43 | inst->write = driver_dmx_write; |
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| 44 | inst->ctl = driver_dmx_ctl; |
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| 45 | |
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| 46 | info->codec = ROAR_CODEC_DMX512; |
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| 47 | |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |
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| 51 | ssize_t driver_dmx_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 52 | if ( vio == NULL || buf == NULL ) |
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| 53 | return -1; |
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| 54 | |
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| 55 | if ( count != 512 ) |
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| 56 | return -1; |
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| 57 | |
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| 58 | if ( lseek(roar_vio_get_fh(vio), 0, SEEK_SET) == (off_t)-1 ) |
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| 59 | return -1; |
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| 60 | |
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| 61 | return write(roar_vio_get_fh(vio), buf, count); |
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| 62 | } |
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| 63 | |
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| 64 | int driver_dmx_ctl(struct roar_vio_calls * vio, int cmd, void * data) { |
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| 65 | |
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| 66 | if ( vio == NULL ) |
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| 67 | return -1; |
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| 68 | |
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| 69 | switch (cmd) { |
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| 70 | case ROAR_VIO_CTL_SET_SSTREAM: |
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| 71 | ROAR_STREAM(data)->dir = ROAR_DIR_LIGHT_OUT; |
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| 72 | ROAR_STREAM_SERVER(data)->codec_orgi = ROAR_CODEC_DMX512; |
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| 73 | break; |
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| 74 | default: |
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| 75 | return -1; |
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| 76 | } |
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| 77 | |
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| 78 | return 0; |
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| 79 | } |
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| 80 | |
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| 81 | //ll |
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