1 | //output.h: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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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 | #ifndef _OUTPUT_H_ |
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26 | #define _OUTPUT_H_ |
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27 | |
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28 | #include <roaraudio.h> |
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29 | |
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30 | //#define ROAR_OUTPUT_BUFFER_SAMPLES 1024 |
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31 | //#define ROAR_OUTPUT_BUFFER_SAMPLES 1024 |
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32 | #ifdef DEBUG |
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33 | // in case of debugging we use a big number of samples to make lager cycles |
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34 | #define ROAR_OUTPUT_BUFFER_SAMPLES 2048 |
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35 | #else |
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36 | //#define ROAR_OUTPUT_BUFFER_SAMPLES 441 |
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37 | |
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38 | #ifdef ROAR_OUTPUT_CFREQ |
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39 | #define ROAR_OUTPUT_BUFFER_SAMPLES (ROAR_RATE_DEFAULT/ROAR_OUTPUT_CFREQ) |
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40 | #else |
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41 | // in normal case we use 100 cycles per sec, as we do not know the sample |
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42 | // rate at compile time we guess it's normaly the default rate. |
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43 | // on OpenBSD we need to set a lower freq, use 20 cycles per sec here as |
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44 | // it seems to work. |
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45 | // FIXME: find out what the problem is and how to fix |
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46 | #ifdef ROAR_OS_OPENBSD |
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47 | #define ROAR_OUTPUT_BUFFER_SAMPLES (ROAR_RATE_DEFAULT/20) |
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48 | #else |
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49 | #define ROAR_OUTPUT_BUFFER_SAMPLES (ROAR_RATE_DEFAULT/100) |
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50 | #endif |
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51 | #endif |
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52 | |
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53 | #endif |
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54 | |
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55 | #define ROAR_OUTPUT_WRITE_SIZE 1024 |
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56 | |
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57 | #define ROAR_OUTPUT_CALC_OUTBUFSIZE(x) (ROAR_OUTPUT_BUFFER_SAMPLES * (x)->channels * ((x)->bits / 8) * ((float)(x)->rate/g_sa->rate)) |
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58 | #define ROAR_OUTPUT_CALC_OUTBUFSAMP(x,y) ((y) / ((x)->channels * ((x)->bits / 8)*((float)(x)->rate/g_sa->rate))) |
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59 | |
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60 | void * g_output_buffer; |
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61 | unsigned int g_output_buffer_len; |
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62 | |
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63 | int output_buffer_init (struct roar_audio_info * info); |
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64 | int output_buffer_reinit (void); |
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65 | int output_buffer_free (void); |
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66 | |
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67 | int output_buffer_flush (DRIVER_USERDATA_T inst, int driver); |
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68 | |
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69 | #endif |
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70 | |
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71 | //ll |
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