1 | //output.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2010 |
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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 | /* |
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29 | void * g_output_buffer; |
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30 | unsigned int g_output_buffer_len; |
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31 | */ |
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32 | |
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33 | int output_buffer_init (struct roar_audio_info * info) { |
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34 | size_t size; // = ROAR_OUTPUT_BUFFER_SAMPLES; |
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35 | void * buf; |
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36 | |
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37 | /* |
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38 | size *= info->channels; |
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39 | size *= info->bits / 8; |
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40 | */ |
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41 | |
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42 | size = ROAR_OUTPUT_CALC_OUTBUFSIZE(info); |
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43 | |
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44 | ROAR_DBG("output_buffer_init(*): output buffer size is %i", size); |
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45 | |
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46 | if ( (buf = malloc(size)) == NULL ) |
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47 | return -1; |
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48 | |
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49 | g_output_buffer = buf; |
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50 | g_output_buffer_len = size; |
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51 | |
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52 | ROAR_DBG("output_buffer_init(*): output buffer is at %p", buf); |
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53 | |
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54 | #ifdef ROAR_HAVE_MLOCK |
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55 | ROAR_MLOCK(buf, size); |
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56 | #endif |
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57 | |
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58 | output_buffer_reinit(); |
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59 | |
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60 | return 0; |
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61 | } |
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62 | |
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63 | int output_buffer_reinit (void) { |
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64 | |
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65 | if ( g_output_buffer != NULL ) |
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66 | memset(g_output_buffer, 0, g_output_buffer_len); |
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67 | |
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68 | return 0; |
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69 | } |
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70 | |
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71 | int output_buffer_free (void) { |
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72 | ROAR_DBG("output_buffer_init(*): freeing output buffer at %p", g_output_buffer); |
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73 | |
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74 | if ( g_output_buffer ) |
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75 | free(g_output_buffer); |
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76 | |
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77 | g_output_buffer = NULL; |
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78 | g_output_buffer_len = 0; |
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79 | |
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80 | return 0; |
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81 | } |
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82 | |
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83 | int output_buffer_flush (DRIVER_USERDATA_T inst, int driver) { |
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84 | ROAR_DBG("output_buffer_init(*): flushing output buffer"); |
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85 | |
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86 | return driver_write(inst, driver, g_output_buffer, g_output_buffer_len); |
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87 | } |
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88 | |
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89 | //ll |
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