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annotate src/audio/nds/SDL_ndsaudio.c @ 5182:f652a24a2e99

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author Sam Lantinga <slouken@libsdl.org>
date Fri, 04 Feb 2011 23:31:56 -0800
parents 4160ba33b597
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 This file written by Ryan C. Gordon (icculus@icculus.org)
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23 */
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24 #include "SDL_config.h"
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25
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26 /* Output audio to NDS */
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27
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28 #include <nds.h>
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29
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30 #include "SDL_audio.h"
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31 #include "../SDL_audio_c.h"
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32 #include "SDL_ndsaudio.h"
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33
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34 static int
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35 NDSAUD_OpenDevice(_THIS, const char *devname, int iscapture)
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36 {
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37 SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
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38 int valid_datatype = 0;
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39
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40 this->hidden = SDL_malloc(sizeof(*(this->hidden)));
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41 if (!this->hidden) {
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42 SDL_OutOfMemory();
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43 return 0;
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44 }
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45 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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46
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47 while ((!valid_datatype) && (test_format)) {
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48 this->spec.format = test_format;
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49 switch (test_format) {
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50 case AUDIO_S8:
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51 /*case AUDIO_S16LSB: */
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52 valid_datatype = 1;
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53 break;
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54 default:
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55 test_format = SDL_NextAudioFormat();
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56 break;
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57 }
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58 }
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59
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60 /* set the generic sound parameters */
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61 setGenericSound(22050, /* sample rate */
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62 127, /* volume */
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63 64, /* panning/balance */
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64 0); /* sound format */
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65
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66 return 1;
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67 }
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68
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69 static void
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70 NDSAUD_PlayDevice(_THIS)
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71 {
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72 TransferSoundData *sound = SDL_malloc(sizeof(TransferSoundData));
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73 if (!sound) {
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74 SDL_OutOfMemory();
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75 }
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76
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77 playGenericSound(this->hidden->mixbuf, this->hidden->mixlen);
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78 #if 0
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79 // sound->data = this->hidden->mixbuf;/* pointer to raw audio data */
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80 // sound->len = this->hidden->mixlen; /* size of raw data pointed to above */
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81 // sound->rate = 22050; /* sample rate = 22050Hz */
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82 // sound->vol = 127; /* volume [0..127] for [min..max] */
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83 // sound->pan = 64; /* balance [0..127] for [left..right] */
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84 // sound->format = 0; /* 0 for 16-bit, 1 for 8-bit */
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85 // playSound(sound);
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86 #endif
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87 }
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88
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89
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90 static Uint8 *
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91 NDSAUD_GetDeviceBuf(_THIS)
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92 {
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93 return this->hidden->mixbuf; /* is this right? */
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94 }
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95
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96 static void
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97 NDSAUD_WaitDevice(_THIS)
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98 {
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99 /* stub */
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100 }
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101
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102 static void
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103 NDSAUD_CloseDevice(_THIS)
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104 {
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105 /* stub */
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106 }
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107
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108 static int
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109 NDSAUD_Init(SDL_AudioDriverImpl * impl)
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110 {
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111 /* Set the function pointers */
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112 impl->OpenDevice = NDSAUD_OpenDevice;
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113 impl->PlayDevice = NDSAUD_PlayDevice;
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114 impl->WaitDevice = NDSAUD_WaitDevice;
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115 impl->GetDeviceBuf = NDSAUD_GetDeviceBuf;
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116 impl->CloseDevice = NDSAUD_CloseDevice;
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117
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118 /* and the capabilities */
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119 impl->HasCaptureSupport = 1;
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120 impl->OnlyHasDefaultOutputDevice = 1;
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121 impl->OnlyHasDefaultInputDevice = 1;
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122
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123 return 1; /* this audio target is available. */
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124 }
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125
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126 AudioBootStrap NDSAUD_bootstrap = {
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127 "nds", "SDL NDS audio driver", NDSAUD_Init, 0 /*1? */
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128 };
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129
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130 /* vi: set ts=4 sw=4 expandtab: */