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 ( device == NULL ) { |
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30 | return -1; |
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31 | } |
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32 | |
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33 | if ( fh == -1 ) { |
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34 | if ( roar_vio_open_file(inst, device, O_WRONLY, 0644) == -1 ) |
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35 | return -1; |
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36 | } else { |
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37 | if ( roar_vio_open_fh(inst, fh) == -1 ) |
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38 | return -1; |
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39 | } |
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40 | |
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41 | inst->write = driver_dmx_write; |
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42 | |
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43 | return 0; |
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44 | } |
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45 | |
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46 | ssize_t driver_dmx_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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47 | if ( vio == NULL || buf == NULL ) |
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48 | return -1; |
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49 | |
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50 | if ( count != 512 ) |
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51 | return -1; |
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52 | |
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53 | if ( lseek(roar_vio_get_fh(vio), 0, SEEK_SET) == (off_t)-1 ) |
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54 | return -1; |
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55 | |
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56 | return write(roar_vio_get_fh(vio), buf, count); |
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57 | } |
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58 | |
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59 | //ll |
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