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comparison src/audio/dart/SDL_dart.c @ 1999:dd4b184b3050

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Let OS/2 DART backend use SDL converters at a higher level (would fail if DART didn't directly support AudioSpec before).
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 31 Aug 2006 22:40:53 +0000
parents c121d94672cb
children 02108bfd6550
comparison
equal deleted inserted replaced
1998:cbac0f77a799 1999:dd4b184b3050
72 72
73 73
74 int 74 int
75 DART_OpenAudio(_THIS, SDL_AudioSpec * spec) 75 DART_OpenAudio(_THIS, SDL_AudioSpec * spec)
76 { 76 {
77 SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
77 MCI_AMP_OPEN_PARMS AmpOpenParms; 78 MCI_AMP_OPEN_PARMS AmpOpenParms;
78 MCI_GENERIC_PARMS GenericParms; 79 MCI_GENERIC_PARMS GenericParms;
79 int iDeviceOrd = 0; // Default device to be used 80 int iDeviceOrd = 0; // Default device to be used
80 int bOpenShared = 1; // Try opening it shared 81 int bOpenShared = 1; // Try opening it shared
81 int iBits = 16; // Default is 16 bits signed 82 int iBits = 16; // Default is 16 bits signed
103 // Save the device ID we got from DART! 104 // Save the device ID we got from DART!
104 // We will use this in the next calls! 105 // We will use this in the next calls!
105 iDeviceOrd = AmpOpenParms.usDeviceID; 106 iDeviceOrd = AmpOpenParms.usDeviceID;
106 107
107 // Determine the audio parameters from the AudioSpec 108 // Determine the audio parameters from the AudioSpec
108 switch (spec->format & 0xFF) { 109 if (spec->channels > 2)
109 case 8: 110 spec->channels = 2; // !!! FIXME: more than stereo support in OS/2?
110 /* Unsigned 8 bit audio data */ 111
111 spec->format = AUDIO_U8; 112 while (test_format) {
112 iSilence = 0x80; 113 spec->format = test_format;
113 iBits = 8; 114 switch (test_format) {
114 break; 115 case AUDIO_U8:
115 case 16: 116 // Unsigned 8 bit audio data
116 /* Signed 16 bit audio data */ 117 iSilence = 0x80;
117 spec->format = AUDIO_S16; 118 iBits = 8;
118 iSilence = 0x00; 119 break;
119 iBits = 16; 120
120 break; 121 case AUDIO_S16LSB:
121 default: 122 // Signed 16 bit audio data
123 iSilence = 0x00;
124 iBits = 16;
125 break;
126
127 // !!! FIXME: int32?
128
129 default:
130 test_format = SDL_NextAudioFormat();
131 break;
132 }
133 }
134
135 if (!test_format) { // shouldn't happen, but just in case...
122 // Close DART, and exit with error code! 136 // Close DART, and exit with error code!
123 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); 137 mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
124 SDL_SetError("Unsupported audio format"); 138 SDL_SetError("Unsupported audio format");
125 return (-1); 139 return (-1);
126 } 140 }
141
127 iFreq = spec->freq; 142 iFreq = spec->freq;
128 iChannels = spec->channels; 143 iChannels = spec->channels;
129 /* Update the fragment size as size in bytes */ 144 /* Update the fragment size as size in bytes */
130 SDL_CalculateAudioSpec(spec); 145 SDL_CalculateAudioSpec(spec);
131 iBufSize = spec->size; 146 iBufSize = spec->size;