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annotate src/audio/mme/SDL_mmeaudio.c @ 1995:0ca6ba107642

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ALSA backend can handle int32 and float32 data directly.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 31 Aug 2006 21:28:21 +0000
parents c121d94672cb
children b3741f227757
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 #include "SDL_config.h"
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23
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24 /* Tru64 UNIX MME support */
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25 #include <mme_api.h>
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26
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27 #include "SDL_timer.h"
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28 #include "SDL_audio.h"
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29 #include "../SDL_audio_c.h"
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30 #include "SDL_mmeaudio.h"
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31
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32 static BOOL inUse[NUM_BUFFERS];
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33
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34 /* Audio driver functions */
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35 static int MME_OpenAudio(_THIS, SDL_AudioSpec * spec);
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36 static void MME_WaitAudio(_THIS);
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37 static Uint8 *MME_GetAudioBuf(_THIS);
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38 static void MME_PlayAudio(_THIS);
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39 static void MME_WaitDone(_THIS);
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40 static void MME_CloseAudio(_THIS);
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41
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42 /* Audio driver bootstrap functions */
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43 static int
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44 Audio_Available(void)
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45 {
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46 return (1);
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47 }
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48
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49 static void
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50 Audio_DeleteDevice(SDL_AudioDevice * device)
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51 {
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52 if (device) {
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53 if (device->hidden) {
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54 SDL_free(device->hidden);
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55 device->hidden = NULL;
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56 }
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57 SDL_free(device);
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58 device = NULL;
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59 }
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60 }
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61
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62 static SDL_AudioDevice *
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63 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
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99 SetMMerror(char *function, MMRESULT code)
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100 {
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101 int len;
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102 char errbuf[MAXERRORLENGTH];
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103
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104 SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function);
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105 len = SDL_strlen(errbuf);
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106 waveOutGetErrorText(code, errbuf + len, MAXERRORLENGTH - len);
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107 SDL_SetError("%s", errbuf);
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108 }
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109
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110 static void CALLBACK
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111 MME_CALLBACK(HWAVEOUT hwo,
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112 UINT uMsg, DWORD dwInstance, LPARAM dwParam1, LPARAM dwParam2)
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113 {
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114 WAVEHDR *wp = (WAVEHDR *) dwParam1;
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115
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116 if (uMsg == WOM_DONE)
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117 inUse[wp->dwUser] = FALSE;
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118 }
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119
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120 static int
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121 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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diff changeset
126 mixbuf = NULL;
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parents:
diff changeset
127
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
128 /* Set basic WAVE format parameters */
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diff changeset
129 shm = mmeAllocMem(sizeof(*shm));
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130 if (shm == NULL) {
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131 SDL_SetError("Out of memory: shm");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
132 return (-1);
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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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parents:
diff changeset
136
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
137 /* Determine the audio parameters from the AudioSpec */
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138 switch (spec->format & 0xFF) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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139 case 8:
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diff changeset
140 /* Unsigned 8 bit audio data */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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141 spec->format = AUDIO_U8;
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142 shm->wFmt.wBitsPerSample = 8;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
143 break;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
144 case 16:
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
145 /* Signed 16 bit audio data */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
146 spec->format = AUDIO_S16;
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147 shm->wFmt.wBitsPerSample = 16;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
148 break;
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
149 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
150 SDL_SetError("Unsupported audio format");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
151 return (-1);
654
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diff changeset
152 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154 shm->wFmt.wf.nChannels = spec->channels;
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
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 =
1895
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diff changeset
157 shm->wFmt.wf.nChannels * shm->wFmt.wBitsPerSample / 8;
654
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
158 shm->wFmt.wf.nAvgBytesPerSec =
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diff changeset
159 shm->wFmt.wf.nSamplesPerSec * shm->wFmt.wf.nBlockAlign;
654
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
160
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 /* Check the buffer size -- minimum of 1/4 second (word aligned) */
1895
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diff changeset
162 if (spec->samples < (spec->freq / 4))
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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163 spec->samples = ((spec->freq / 4) + 3) & ~3;
654
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parents:
diff changeset
164
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
165 /* Update the fragment size as size in bytes */
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
166 SDL_CalculateAudioSpec(spec);
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
167
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
168 /* Open the audio device */
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
169 result = waveOutOpen(&(shm->sound),
1895
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diff changeset
170 WAVE_MAPPER,
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diff changeset
171 &(shm->wFmt.wf),
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172 MME_CALLBACK,
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
173 NULL, (CALLBACK_FUNCTION | WAVE_OPEN_SHAREABLE));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
174 if (result != MMSYSERR_NOERROR) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
175 SetMMerror("waveOutOpen()", result);
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diff changeset
176 return (-1);
654
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diff changeset
177 }
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178
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179 /* Create the sound buffers */
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180 mixbuf = (Uint8 *) mmeAllocBuffer(NUM_BUFFERS * (spec->size));
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diff changeset
181 if (mixbuf == NULL) {
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182 SDL_SetError("Out of memory: mixbuf");
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diff changeset
183 return (-1);
654
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184 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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diff changeset
185
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
186 for (i = 0; i < NUM_BUFFERS; i++) {
1895
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187 shm->wHdr[i].lpData = &mixbuf[i * (spec->size)];
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diff changeset
188 shm->wHdr[i].dwBufferLength = spec->size;
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189 shm->wHdr[i].dwFlags = 0;
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diff changeset
190 shm->wHdr[i].dwUser = i;
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191 shm->wHdr[i].dwLoops = 0; /* loop control counter */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
192 shm->wHdr[i].lpNext = NULL; /* reserved for driver */
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diff changeset
193 shm->wHdr[i].reserved = 0;
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diff changeset
194 inUse[i] = FALSE;
654
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195 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
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diff changeset
196 next_buffer = 0;
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diff changeset
197 return 0;
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diff changeset
198 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
199
1895
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diff changeset
200 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
201 MME_WaitAudio(_THIS)
654
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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diff changeset
202 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
203 while (inUse[next_buffer]) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
204 mmeWaitForCallbacks();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
205 mmeProcessCallbacks();
755
b1595db396a7 Date: Fri, 12 Dec 2003 11:51:21 +0900
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diff changeset
206 }
654
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
207 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
208
1895
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diff changeset
209 static Uint8 *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
210 MME_GetAudioBuf(_THIS)
654
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
211 {
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
212 Uint8 *retval;
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
213
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
214 inUse[next_buffer] = TRUE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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215 retval = (Uint8 *) (shm->wHdr[next_buffer].lpData);
654
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
216 return retval;
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
1895
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diff changeset
219 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
220 MME_PlayAudio(_THIS)
654
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
221 {
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
222 /* Queue it up */
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
223 waveOutWrite(shm->sound, &(shm->wHdr[next_buffer]), sizeof(WAVEHDR));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
224 next_buffer = (next_buffer + 1) % NUM_BUFFERS;
654
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diff changeset
225 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
226
1895
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diff changeset
227 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
228 MME_WaitDone(_THIS)
654
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diff changeset
229 {
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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diff changeset
230 MMRESULT result;
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231 int i;
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
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parents:
diff changeset
232
1895
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diff changeset
233 if (shm->sound) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
234 for (i = 0; i < NUM_BUFFERS; i++)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
235 while (inUse[i]) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
236 mmeWaitForCallbacks();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
237 mmeProcessCallbacks();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
238 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
239 result = waveOutReset(shm->sound);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
240 if (result != MMSYSERR_NOERROR)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
241 SetMMerror("waveOutReset()", result);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
242 mmeProcessCallbacks();
654
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parents:
diff changeset
243 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 }
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
245
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diff changeset
246 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
247 MME_CloseAudio(_THIS)
654
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diff changeset
248 {
e92bcf2573cb Added audio and CD-ROM support for OSF/Tru64 (thanks Hayashi!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 MMRESULT result;
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250
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251 if (mixbuf) {
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252 result = mmeFreeBuffer(mixbuf);
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253 if (result != MMSYSERR_NOERROR)
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254 SetMMerror("mmeFreeBuffer", result);
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255 mixbuf = NULL;
654
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256 }
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257
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258 if (shm) {
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259 if (shm->sound) {
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260 result = waveOutClose(shm->sound);
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261 if (result != MMSYSERR_NOERROR)
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262 SetMMerror("waveOutClose()", result);
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263 mmeProcessCallbacks();
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264 }
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265 result = mmeFreeMem(shm);
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266 if (result != MMSYSERR_NOERROR)
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267 SetMMerror("mmeFreeMem()", result);
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268 shm = NULL;
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269 }
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270 }
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271
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272 /* vi: set ts=4 sw=4 expandtab: */