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annotate src/audio/mme/SDL_mmeaudio.c @ 1342:d73be99e9420

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Fixed it Hayashi Naoyuki's way. :)
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 12:15:46 +0000
parents 604d73db6802
children c71e05b4dc2e
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* Tru64 UNIX MME support */
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24 #include <mme_api.h>
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25
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26 #include "SDL_stdlib.h"
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27 #include "SDL_string.h"
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28 #include "SDL_audio.h"
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29 #include "SDL_mutex.h"
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30 #include "SDL_timer.h"
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31 #include "SDL_audio_c.h"
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32
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33 #include "SDL_mmeaudio.h"
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34
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35 static BOOL inUse[NUM_BUFFERS];
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36
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37 /* Audio driver functions */
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38 static int MME_OpenAudio(_THIS, SDL_AudioSpec *spec);
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39 static void MME_WaitAudio(_THIS);
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40 static Uint8 *MME_GetAudioBuf(_THIS);
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41 static void MME_PlayAudio(_THIS);
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42 static void MME_WaitDone(_THIS);
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43 static void MME_CloseAudio(_THIS);
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44
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45 /* Audio driver bootstrap functions */
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46 static int Audio_Available(void)
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47 {
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48 return(1);
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49 }
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50
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51 static void Audio_DeleteDevice(SDL_AudioDevice *device)
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52 {
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53 if ( device ) {
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54 if ( device->hidden ) {
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55 SDL_free(device->hidden);
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56 device->hidden = NULL;
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57 }
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58 SDL_free(device);
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59 device = NULL;
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60 }
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61 }
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62
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63 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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64 {
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65 SDL_AudioDevice *this;
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66
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67 /* Initialize all variables that we clean on shutdown */
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68 this = SDL_malloc(sizeof(SDL_AudioDevice));
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69 if ( this ) {
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70 SDL_memset(this, 0, (sizeof *this));
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71 this->hidden = SDL_malloc((sizeof *this->hidden));
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72 }
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73 if ( (this == NULL) || (this->hidden == NULL) ) {
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74 SDL_OutOfMemory();
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75 if ( this ) {
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76 SDL_free(this);
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77 }
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78 return(0);
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79 }
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80 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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81 /* Set the function pointers */
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82 this->OpenAudio = MME_OpenAudio;
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83 this->WaitAudio = MME_WaitAudio;
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84 this->PlayAudio = MME_PlayAudio;
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85 this->GetAudioBuf = MME_GetAudioBuf;
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86 this->WaitDone = MME_WaitDone;
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87 this->CloseAudio = MME_CloseAudio;
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88 this->free = Audio_DeleteDevice;
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89
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90 return this;
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91 }
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92
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93 AudioBootStrap MMEAUDIO_bootstrap = {
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94 "waveout", "Tru64 MME WaveOut",
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95 Audio_Available, Audio_CreateDevice
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96 };
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97
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98 static void SetMMerror(char *function, MMRESULT code)
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99 {
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100 int len;
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101 char errbuf[MAXERRORLENGTH];
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102
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103 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function);
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104 len = SDL_strlen(errbuf);
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105 waveOutGetErrorText(code, errbuf+len, MAXERRORLENGTH-len);
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106 SDL_SetError("%s",errbuf);
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107 }
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108
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109 static void CALLBACK MME_CALLBACK(HWAVEOUT hwo,
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110 UINT uMsg,
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111 DWORD dwInstance,
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112 LPARAM dwParam1,
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113 LPARAM dwParam2)
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114 {
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115 WAVEHDR *wp = (WAVEHDR *) dwParam1;
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116
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117 if ( uMsg == WOM_DONE )
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118 inUse[wp->dwUser] = FALSE;
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119 }
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120
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121 static int MME_OpenAudio(_THIS, SDL_AudioSpec *spec)
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122 {
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123 MMRESULT result;
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124 int i;
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125
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126 mixbuf = NULL;
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127
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128 /* Set basic WAVE format parameters */
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parents:
diff changeset
129 shm = mmeAllocMem(sizeof(*shm));
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parents:
diff changeset
130 if ( shm == NULL ) {
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parents:
diff changeset
131 SDL_SetError("Out of memory: shm");
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parents:
diff changeset
132 return(-1);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
133 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
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diff changeset
134 shm->sound = 0;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
135 shm->wFmt.wf.wFormatTag = WAVE_FORMAT_PCM;
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diff changeset
136
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parents:
diff changeset
137 /* Determine the audio parameters from the AudioSpec */
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parents:
diff changeset
138 switch ( spec->format & 0xFF ) {
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diff changeset
139 case 8:
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
140 /* Unsigned 8 bit audio data */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
141 spec->format = AUDIO_U8;
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diff changeset
142 shm->wFmt.wBitsPerSample = 8;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
143 break;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
144 case 16:
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
145 /* Signed 16 bit audio data */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
146 spec->format = AUDIO_S16;
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diff changeset
147 shm->wFmt.wBitsPerSample = 16;
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diff changeset
148 break;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
149 default:
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150 SDL_SetError("Unsupported audio format");
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diff changeset
151 return(-1);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
152 }
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
154 shm->wFmt.wf.nChannels = spec->channels;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
155 shm->wFmt.wf.nSamplesPerSec = spec->freq;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
156 shm->wFmt.wf.nBlockAlign =
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
157 shm->wFmt.wf.nChannels * shm->wFmt.wBitsPerSample / 8;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
158 shm->wFmt.wf.nAvgBytesPerSec =
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
159 shm->wFmt.wf.nSamplesPerSec * shm->wFmt.wf.nBlockAlign;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
160
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 /* Check the buffer size -- minimum of 1/4 second (word aligned) */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162 if ( spec->samples < (spec->freq/4) )
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
163 spec->samples = ((spec->freq/4)+3)&~3;
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diff changeset
164
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
165 /* Update the fragment size as size in bytes */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
166 SDL_CalculateAudioSpec(spec);
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
167
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
168 /* Open the audio device */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
169 result = waveOutOpen(&(shm->sound),
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diff changeset
170 WAVE_MAPPER,
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
171 &(shm->wFmt.wf),
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parents:
diff changeset
172 MME_CALLBACK,
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
173 NULL,
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
174 (CALLBACK_FUNCTION|WAVE_OPEN_SHAREABLE));
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
175 if ( result != MMSYSERR_NOERROR ) {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
176 SetMMerror("waveOutOpen()", result);
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parents:
diff changeset
177 return(-1);
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
178 }
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
179
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
180 /* Create the sound buffers */
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
181 mixbuf = (Uint8 *)mmeAllocBuffer(NUM_BUFFERS * (spec->size));
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parents:
diff changeset
182 if ( mixbuf == NULL ) {
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
183 SDL_SetError("Out of memory: mixbuf");
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diff changeset
184 return(-1);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
185 }
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diff changeset
186
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
187 for (i = 0; i < NUM_BUFFERS; i++) {
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diff changeset
188 shm->wHdr[i].lpData = &mixbuf[i * (spec->size)];
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diff changeset
189 shm->wHdr[i].dwBufferLength = spec->size;
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diff changeset
190 shm->wHdr[i].dwFlags = 0;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
191 shm->wHdr[i].dwUser = i;
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diff changeset
192 shm->wHdr[i].dwLoops = 0; /* loop control counter */
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diff changeset
193 shm->wHdr[i].lpNext = NULL; /* reserved for driver */
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diff changeset
194 shm->wHdr[i].reserved = 0;
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diff changeset
195 inUse[i] = FALSE;
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diff changeset
196 }
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diff changeset
197 next_buffer = 0;
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diff changeset
198 return 0;
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diff changeset
199 }
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diff changeset
200
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
201 static void MME_WaitAudio(_THIS)
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diff changeset
202 {
755
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diff changeset
203 while ( inUse[next_buffer] ) {
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diff changeset
204 mmeWaitForCallbacks();
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diff changeset
205 mmeProcessCallbacks();
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
206 }
654
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diff changeset
207 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
208
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
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diff changeset
209 static Uint8 *MME_GetAudioBuf(_THIS)
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diff changeset
210 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
211 Uint8 *retval;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
212
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
213 inUse[next_buffer] = TRUE;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
214 retval = (Uint8 *)(shm->wHdr[next_buffer].lpData);
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diff changeset
215 return retval;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
216 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
217
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
218 static void MME_PlayAudio(_THIS)
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parents:
diff changeset
219 {
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
220 /* Queue it up */
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
221 waveOutWrite(shm->sound, &(shm->wHdr[next_buffer]), sizeof(WAVEHDR));
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
222 next_buffer = (next_buffer+1)%NUM_BUFFERS;
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parents:
diff changeset
223 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
224
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
225 static void MME_WaitDone(_THIS)
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parents:
diff changeset
226 {
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
227 MMRESULT result;
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
228 int i;
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parents:
diff changeset
229
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
230 if ( shm->sound ) {
755
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diff changeset
231 for (i = 0; i < NUM_BUFFERS; i++)
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diff changeset
232 while ( inUse[i] ) {
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
233 mmeWaitForCallbacks();
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diff changeset
234 mmeProcessCallbacks();
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
235 }
654
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diff changeset
236 result = waveOutReset(shm->sound);
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parents:
diff changeset
237 if ( result != MMSYSERR_NOERROR )
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parents:
diff changeset
238 SetMMerror("waveOutReset()", result);
755
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diff changeset
239 mmeProcessCallbacks();
654
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parents:
diff changeset
240 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
241 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
242
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243 static void MME_CloseAudio(_THIS)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245 MMRESULT result;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 if ( mixbuf ) {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248 result = mmeFreeBuffer(mixbuf);
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parents:
diff changeset
249 if (result != MMSYSERR_NOERROR )
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parents:
diff changeset
250 SetMMerror("mmeFreeBuffer", result);
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
251 mixbuf = NULL;
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
252 }
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parents:
diff changeset
253
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
254 if ( shm ) {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
255 if ( shm->sound ) {
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
256 result = waveOutClose(shm->sound);
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257 if (result != MMSYSERR_NOERROR )
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258 SetMMerror("waveOutClose()", result);
755
b1595db396a7 Date: Fri, 12 Dec 2003 11:51:21 +0900
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259 mmeProcessCallbacks();
654
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260 }
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261 result = mmeFreeMem(shm);
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262 if (result != MMSYSERR_NOERROR )
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263 SetMMerror("mmeFreeMem()", result);
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264 shm = NULL;
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265 }
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266 }
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267