notaz.gp2x.de / pcsx_rearmed.git / blame
| Commit | Line | Data |
|---|---|---|
| ef79bbde P |
1 | /*************************************************************************** |
| 2 | oss.c - description | |
| 3 | ------------------- | |
| 4 | begin : Wed May 15 2002 | |
| 5 | copyright : (C) 2002 by Pete Bernert | |
| 6 | email : BlackDove@addcom.de | |
| 7 | ***************************************************************************/ | |
| 8 | /*************************************************************************** | |
| 9 | * * | |
| 10 | * This program is free software; you can redistribute it and/or modify * | |
| 11 | * it under the terms of the GNU General Public License as published by * | |
| 12 | * the Free Software Foundation; either version 2 of the License, or * | |
| 13 | * (at your option) any later version. See also the license.txt file for * | |
| 14 | * additional informations. * | |
| 15 | * * | |
| 16 | ***************************************************************************/ | |
| 17 | ||
| 18 | #include "stdafx.h" | |
| 19 | ||
| 20 | #define _IN_OSS | |
| 21 | ||
| 22 | #include "externals.h" | |
| 23 | ||
| 24 | //////////////////////////////////////////////////////////////////////// | |
| 25 | // oss globals | |
| 26 | //////////////////////////////////////////////////////////////////////// | |
| 27 | ||
| 28 | #define OSS_MODE_STEREO 1 | |
| 29 | #define OSS_MODE_MONO 0 | |
| 30 | ||
| 31 | #define OSS_SPEED_44100 44100 | |
| 32 | ||
| 33 | static int oss_audio_fd = -1; | |
| 34 | extern int errno; | |
| 35 | ||
| 36 | //////////////////////////////////////////////////////////////////////// | |
| 37 | // SETUP SOUND | |
| 38 | //////////////////////////////////////////////////////////////////////// | |
| 39 | ||
| 40 | void SetupSound(void) | |
| 41 | { | |
| 42 | int pspeed=44100; | |
| 43 | int pstereo; | |
| 44 | int format; | |
| 45 | int fragsize = 0; | |
| 46 | int myfrag; | |
| 47 | int oss_speed, oss_stereo; | |
| 48 | ||
| 49 | if(iDisStereo) pstereo=OSS_MODE_MONO; | |
| 50 | else pstereo=OSS_MODE_STEREO; | |
| 51 | ||
| 52 | oss_speed = pspeed; | |
| 53 | oss_stereo = pstereo; | |
| 54 | ||
| 55 | if((oss_audio_fd=open("/dev/dsp",O_WRONLY,0))==-1) | |
| 56 | { | |
| 57 | printf("Sound device not available!\n"); | |
| 58 | return; | |
| 59 | } | |
| 60 | ||
| 61 | if(ioctl(oss_audio_fd,SNDCTL_DSP_RESET,0)==-1) | |
| 62 | { | |
| 63 | printf("Sound reset failed\n"); | |
| 64 | return; | |
| 65 | } | |
| 66 | ||
| 67 | // we use 64 fragments with 1024 bytes each | |
| 17ed0d69 | 68 | // rearmed: now using 10*4096 for better latency |
| ef79bbde | 69 | |
| 17ed0d69 | 70 | fragsize=12; |
| 71 | myfrag=(10<<16)|fragsize; | |
| ef79bbde P |
72 | |
| 73 | if(ioctl(oss_audio_fd,SNDCTL_DSP_SETFRAGMENT,&myfrag)==-1) | |
| 74 | { | |
| 75 | printf("Sound set fragment failed!\n"); | |
| 76 | return; | |
| 77 | } | |
| 78 | ||
| 79 | format = AFMT_S16_NE; | |
| 80 | ||
| 81 | if(ioctl(oss_audio_fd,SNDCTL_DSP_SETFMT,&format) == -1) | |
| 82 | { | |
| 83 | printf("Sound format not supported!\n"); | |
| 84 | return; | |
| 85 | } | |
| 86 | ||
| 87 | if(format!=AFMT_S16_NE) | |
| 88 | { | |
| 89 | printf("Sound format not supported!\n"); | |
| 90 | return; | |
| 91 | } | |
| 92 | ||
| 93 | if(ioctl(oss_audio_fd,SNDCTL_DSP_STEREO,&oss_stereo)==-1) | |
| 94 | { | |
| 95 | printf("Stereo mode not supported!\n"); | |
| 96 | return; | |
| 97 | } | |
| 98 | ||
| 99 | if(oss_stereo!=1) | |
| 100 | { | |
| 101 | iDisStereo=1; | |
| 102 | } | |
| 103 | ||
| 104 | if(ioctl(oss_audio_fd,SNDCTL_DSP_SPEED,&oss_speed)==-1) | |
| 105 | { | |
| 106 | printf("Sound frequency not supported\n"); | |
| 107 | return; | |
| 108 | } | |
| 109 | ||
| 110 | if(oss_speed!=pspeed) | |
| 111 | { | |
| 112 | printf("Sound frequency not supported\n"); | |
| 113 | return; | |
| 114 | } | |
| 115 | } | |
| 116 | ||
| 117 | //////////////////////////////////////////////////////////////////////// | |
| 118 | // REMOVE SOUND | |
| 119 | //////////////////////////////////////////////////////////////////////// | |
| 120 | ||
| 121 | void RemoveSound(void) | |
| 122 | { | |
| 123 | if(oss_audio_fd != -1 ) | |
| 124 | { | |
| 125 | close(oss_audio_fd); | |
| 126 | oss_audio_fd = -1; | |
| 127 | } | |
| 128 | } | |
| 129 | ||
| 130 | //////////////////////////////////////////////////////////////////////// | |
| 131 | // GET BYTES BUFFERED | |
| 132 | //////////////////////////////////////////////////////////////////////// | |
| 133 | ||
| 134 | unsigned long SoundGetBytesBuffered(void) | |
| 135 | { | |
| 136 | audio_buf_info info; | |
| 137 | unsigned long l; | |
| 138 | ||
| 139 | if(oss_audio_fd == -1) return SOUNDSIZE; | |
| 140 | if(ioctl(oss_audio_fd,SNDCTL_DSP_GETOSPACE,&info)==-1) | |
| 141 | l=0; | |
| 142 | else | |
| 143 | { | |
| 144 | if(info.fragments<(info.fragstotal>>1)) // can we write in at least the half of fragments? | |
| 145 | l=SOUNDSIZE; // -> no? wait | |
| 146 | else l=0; // -> else go on | |
| 147 | } | |
| 148 | ||
| 149 | return l; | |
| 150 | } | |
| 151 | ||
| 152 | //////////////////////////////////////////////////////////////////////// | |
| 153 | // FEED SOUND DATA | |
| 154 | //////////////////////////////////////////////////////////////////////// | |
| 155 | ||
| 156 | void SoundFeedStreamData(unsigned char* pSound,long lBytes) | |
| 157 | { | |
| 158 | if(oss_audio_fd == -1) return; | |
| 159 | write(oss_audio_fd,pSound,lBytes); | |
| 160 | } |