1 | //esdbasic.c: |
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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 | * The code (may) include prototypes and comments (and maybe |
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6 | * other code fragements) from EsounD. |
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7 | * They are mostly copyrighted by Eric B. Mitchell (aka 'Ricdude) |
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8 | * <ericmit@ix.netcom.com>. For more information see AUTHORS.esd. |
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9 | * |
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10 | * This file is part of libroaresd a part of RoarAudio, |
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11 | * a cross-platform sound system for both, home and professional use. |
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12 | * See README for details. |
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13 | * |
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14 | * This file is free software; you can redistribute it and/or modify |
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15 | * it under the terms of the GNU General Public License version 3 |
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16 | * as published by the Free Software Foundation. |
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17 | * |
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18 | * RoarAudio is distributed in the hope that it will be useful, |
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19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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21 | * GNU General Public License for more details. |
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22 | * |
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23 | * You should have received a copy of the GNU General Public License |
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24 | * along with this software; see the file COPYING. If not, write to |
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25 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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26 | * |
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27 | * NOTE for everyone want's to change something and send patches: |
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28 | * read README and HACKING! There a addition information on |
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29 | * the license of this document you need to read before you send |
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30 | * any patches. |
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31 | * |
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32 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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33 | * or libpulse*: |
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34 | * The libs libroaresd, libroararts and libroarpulse link this libroar |
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35 | * and are therefore GPL. Because of this it may be illigal to use |
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36 | * them with any software that uses libesd, libartsc or libpulse*. |
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37 | */ |
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38 | |
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39 | #include "libroaresd.h" |
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40 | |
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41 | /* opens channel, authenticates connection, and prefares for protos */ |
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42 | /* returns EsounD socket for communication, result < 0 = error */ |
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43 | /* server = listen socket (localhost:5001, 192.168.168.0:9999 */ |
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44 | /* rate, format = (bits | channels | stream | func) */ |
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45 | int esd_open_sound( const char *host ) { |
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46 | struct roar_connection con; |
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47 | int fh; |
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48 | |
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49 | if ( roar_simple_connect(&con, (char*) host, NULL) == -1 ) { |
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50 | ROAR_DBG("esd_open_sound(*): roar_simple_connect() faild!"); |
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51 | return -1; |
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52 | } |
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53 | |
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54 | if ( (fh = roar_get_connection_fh(&con)) == -1 ) { |
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55 | roar_disconnect(&con); |
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56 | return -1; |
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57 | } |
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58 | |
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59 | return fh; |
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60 | } |
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61 | |
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62 | /* send the authorization cookie, create one if needed */ |
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63 | int esd_send_auth( int sock ) { |
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64 | return 0; |
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65 | } |
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66 | |
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67 | /* closes fd, previously obtained by esd_open */ |
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68 | int esd_close( int esd ) { |
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69 | return roar_simple_close(esd); |
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70 | } |
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71 | |
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72 | /* get the stream latency to esound (latency is number of samples */ |
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73 | /* at 44.1khz stereo 16 bit - you'll have to adjust if oyur input */ |
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74 | /* sampling rate is less (in bytes per second) */ |
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75 | /* so if you're at 44.1khz stereo 16bit in your stream - your lag */ |
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76 | /* in bytes woudl be lag * 2 * 2 bytes (2 for stereo, 2 for 16bit) */ |
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77 | /* if your stream is at 22.05 Khz it'll be double this - in mono */ |
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78 | /* double again ... etc. */ |
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79 | int esd_get_latency(int esd) { |
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80 | struct timeval try, ans; |
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81 | struct roar_message m; |
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82 | struct roar_connection con; |
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83 | |
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84 | m.cmd = ROAR_CMD_NOOP; |
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85 | m.datalen = 0; |
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86 | |
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87 | roar_connect_fh(&con, esd); |
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88 | |
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89 | gettimeofday(&try, NULL); |
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90 | roar_req(&con, &m, NULL); |
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91 | gettimeofday(&ans, NULL); |
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92 | |
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93 | while (ans.tv_sec > try.tv_sec) { |
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94 | ans.tv_sec--; |
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95 | ans.tv_usec += 1000000; |
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96 | } |
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97 | ans.tv_usec -= try.tv_usec; |
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98 | |
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99 | /* |
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100 | 1 -> 44100 |
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101 | 0.5 -> 22050 |
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102 | */ |
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103 | |
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104 | return 441*ans.tv_usec/10000; |
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105 | } |
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106 | |
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107 | |
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108 | //ll |
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