1 | //driver_wmm.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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5 | * |
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6 | * This file is part of roard a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * RoarAudio is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include "roard.h" |
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26 | |
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27 | #ifdef ROAR_HAVE_LIBWINMM |
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28 | |
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29 | static int _alloc_wave_headers(struct driver_wmm * self) { |
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30 | int bytesPerBlock = self->wavefmt.nBlockAlign * self->splPerBlock; |
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31 | /* int bytes = internal->blocks * (sizeof(WAVEHDR) + bytesPerBlock); */ |
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32 | int bytes = self->blocks * (sizeof(*self->wh) + bytesPerBlock); |
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33 | int res; |
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34 | MMRESULT mmres; |
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35 | |
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36 | self->bigbuffer = malloc(bytes); |
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37 | if (self->bigbuffer != NULL) { |
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38 | int i; |
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39 | BYTE * b; |
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40 | |
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41 | memset(self->bigbuffer,0,bytes); |
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42 | self->wh = self->bigbuffer; |
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43 | self->spl = (LPBYTE) (self->wh+self->blocks); |
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44 | for (i=0, b=self->spl; i<self->blocks; ++i, b+=bytesPerBlock) { |
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45 | self->wh[i].data = b; |
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46 | self->wh[i].wh.lpData = self->wh[i].data; |
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47 | self->wh[i].length = bytesPerBlock; |
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48 | self->wh[i].wh.dwBufferLength = self->wh[i].length; |
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49 | self->wh[i].wh.dwUser = (DWORD_PTR)self; |
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50 | mmres = waveOutPrepareHeader(self->hwo, |
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51 | &self->wh[i].wh,sizeof(WAVEHDR)); |
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52 | if (MMSYSERR_NOERROR != mmres) { |
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53 | break; |
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54 | } |
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55 | } |
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56 | if (i<self->blocks) { |
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57 | while (--i >= 0) { |
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58 | waveOutUnprepareHeader(self->hwo, |
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59 | &self->wh[i].wh,sizeof(WAVEHDR)); |
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60 | } |
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61 | free(self->bigbuffer); |
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62 | self->wh = 0; |
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63 | self->spl = 0; |
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64 | self->bigbuffer = 0; |
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65 | } else { |
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66 | /* all ok ! */ |
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67 | } |
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68 | } |
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69 | |
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70 | res = (self->bigbuffer != NULL); |
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71 | return res; |
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72 | } |
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73 | |
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74 | static int _get_free_block(struct driver_wmm * self); |
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75 | static int _wait_wave_headers(struct driver_wmm * self, int wait_all) { |
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76 | int res = 1; |
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77 | |
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78 | while (self->sent_blocks > 0) { |
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79 | int n; |
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80 | _get_free_block(self); |
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81 | n = self->sent_blocks; |
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82 | if (n > 0) { |
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83 | unsigned int ms = (self->msPerBlock>>1)+1; |
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84 | if (wait_all) ms *= n; |
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85 | Sleep(ms); |
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86 | } |
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87 | } |
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88 | |
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89 | res &= !self->sent_blocks; |
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90 | return res; |
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91 | } |
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92 | |
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93 | static int _get_free_block(struct driver_wmm * self) { |
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94 | const int idx = self->widx; |
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95 | int ridx = self->ridx; |
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96 | |
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97 | while (self->wh[ridx].sent && !!(self->wh[ridx].wh.dwFlags & WHDR_DONE)) { |
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98 | /* block successfully sent to hardware, release it */ |
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99 | /*debug("_ao_get_free_block: release block %d\n",ridx);*/ |
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100 | self->wh[ridx].sent = 0; |
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101 | self->wh[ridx].wh.dwFlags &= ~WHDR_DONE; |
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102 | |
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103 | --self->full_blocks; |
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104 | if (self->full_blocks<0) { |
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105 | self->full_blocks = 0; |
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106 | } |
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107 | |
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108 | --self->sent_blocks; |
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109 | if (self->sent_blocks<0) { |
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110 | self->sent_blocks = 0; |
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111 | } |
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112 | if (++ridx >= self->blocks) ridx = 0; |
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113 | } |
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114 | self->ridx = ridx; |
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115 | |
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116 | return self->wh[idx].sent |
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117 | ? -1 |
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118 | : idx; |
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119 | } |
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120 | |
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121 | static int _free_wave_headers(struct driver_wmm * self) { |
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122 | MMRESULT mmres; |
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123 | int res = 1; |
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124 | |
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125 | if (self->wh) { |
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126 | int i; |
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127 | |
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128 | /* Reset so we dont need to wait ... Just a satefy net |
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129 | * since _ao_wait_wave_headers() has been called once before. |
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130 | */ |
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131 | mmres = waveOutReset(self->hwo); |
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132 | /* Wait again to be sure reseted waveheaders has been released. */ |
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133 | _wait_wave_headers(self, 0); |
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134 | |
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135 | for (i=self->blocks; --i>=0; ) { |
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136 | mmres = waveOutUnprepareHeader(self->hwo, |
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137 | &self->wh[i].wh,sizeof(WAVEHDR)); |
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138 | |
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139 | res &= mmres == MMSYSERR_NOERROR; |
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140 | } |
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141 | self->wh = 0; |
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142 | self->spl = 0; |
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143 | } |
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144 | |
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145 | return res; |
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146 | } |
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147 | |
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148 | /* Send a block to audio hardware */ |
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149 | static int _send_block(struct driver_wmm * self, const int idx) { |
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150 | MMRESULT mmres; |
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151 | |
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152 | /* Satanity checks */ |
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153 | if (self->wh[idx].sent) { |
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154 | return 0; |
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155 | } |
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156 | if (!!(self->wh[idx].wh.dwFlags & WHDR_DONE)) { |
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157 | return 0; |
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158 | } |
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159 | |
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160 | /* count <= 0, just pretend it's been sent */ |
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161 | if (self->wh[idx].count <= 0) { |
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162 | self->wh[idx].sent = 2; /* set with 2 so we can track these special cases */ |
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163 | self->wh[idx].wh.dwFlags |= WHDR_DONE; |
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164 | ++self->sent_blocks; |
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165 | return 1; |
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166 | } |
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167 | |
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168 | self->wh[idx].wh.dwBufferLength = self->wh[idx].count; |
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169 | self->wh[idx].count = 0; |
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170 | mmres = waveOutWrite(self->hwo, |
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171 | &self->wh[idx].wh, sizeof(WAVEHDR)); |
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172 | self->wh[idx].sent = (mmres == MMSYSERR_NOERROR); |
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173 | /*&& !(internal->wh[idx].wh.dwFlags & WHDR_DONE);*/ |
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174 | self->sent_blocks += self->wh[idx].sent; |
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175 | return mmres == MMSYSERR_NOERROR; |
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176 | } |
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177 | |
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178 | int driver_wmm_open_vio(struct roar_vio_calls * inst, char * device, struct roar_audio_info * info, int fh, struct roar_stream_server * sstream) { |
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179 | struct driver_wmm * self; |
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180 | WAVEFORMATEX wavefmt; |
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181 | MMRESULT mmres; |
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182 | |
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183 | if ( (self = malloc(sizeof(struct driver_wmm))) == NULL ) |
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184 | return -1; |
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185 | |
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186 | memset(self, 0, sizeof(struct driver_wmm)); |
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187 | |
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188 | // VIO Setup: |
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189 | memset(inst, 0, sizeof(struct roar_vio_calls)); |
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190 | inst->inst = self; |
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191 | inst->close = driver_wmm_close_vio; |
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192 | inst->write = driver_wmm_write; |
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193 | |
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194 | // WMM Setup: |
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195 | memset(&wavefmt, 0, sizeof(wavefmt)); |
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196 | |
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197 | info->codec = ROAR_CODEC_PCM_S_LE; |
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198 | |
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199 | self->wavefmt.wFormatTag = WAVE_FORMAT_PCM; |
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200 | self->wavefmt.nChannels = info->channels; |
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201 | self->wavefmt.wBitsPerSample = info->bits; |
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202 | self->wavefmt.nSamplesPerSec = info->rate; |
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203 | self->wavefmt.nBlockAlign = (self->wavefmt.wBitsPerSample>>3)*self->wavefmt.nChannels; |
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204 | self->wavefmt.nAvgBytesPerSec = self->wavefmt.nSamplesPerSec*self->wavefmt.nBlockAlign; |
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205 | self->wavefmt.cbSize = 0; |
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206 | |
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207 | /* $$$ later this should be optionnal parms */ |
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208 | self->id = WAVE_MAPPER; |
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209 | self->blocks = 64; |
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210 | self->splPerBlock = 512; |
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211 | self->msPerBlock = |
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212 | (self->splPerBlock * 1000 + info->rate - 1) / info->rate; |
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213 | |
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214 | mmres = |
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215 | waveOutOpen(&self->hwo, |
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216 | self->id, |
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217 | &self->wavefmt, |
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218 | (DWORD_PTR)0/* waveOutProc */, |
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219 | (DWORD_PTR)self, |
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220 | CALLBACK_NULL/* |WAVE_FORMAT_DIRECT */|WAVE_ALLOWSYNC); |
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221 | if ( mmres != MMSYSERR_NOERROR ) { |
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222 | driver_wmm_close_vio(inst); |
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223 | return -1; |
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224 | } |
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225 | |
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226 | // FIXME: do error checking |
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227 | waveOutGetID(self->hwo, &(self->id)); |
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228 | |
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229 | _alloc_wave_headers(self); |
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230 | |
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231 | self->opened = 1; |
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232 | |
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233 | ROAR_DBG("driver_wmm_open_vio(*) = 0"); |
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234 | |
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235 | return 0; |
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236 | } |
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237 | |
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238 | int driver_wmm_close_vio(struct roar_vio_calls * vio) { |
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239 | struct driver_wmm * self; |
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240 | |
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241 | if ( vio == NULL ) |
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242 | return -1; |
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243 | |
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244 | if ( (self = vio->inst) == NULL ) |
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245 | return -1; |
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246 | |
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247 | if ( self->opened ) { |
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248 | _wait_wave_headers(self, 1); |
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249 | _free_wave_headers(self); |
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250 | waveOutClose(self->hwo); |
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251 | } |
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252 | |
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253 | free(self); |
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254 | |
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255 | ROAR_DBG("driver_wmm_close_vio(*) = 0"); |
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256 | |
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257 | return 0; |
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258 | } |
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259 | |
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260 | ssize_t driver_wmm_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
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261 | struct driver_wmm * self; |
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262 | ssize_t ret_ok = count; |
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263 | int ret = 1; |
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264 | |
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265 | ROAR_DBG("driver_wmm_write(vio=%p, buf=%p, count=%lu) = ?", vio, buf, (unsigned long)count); |
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266 | |
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267 | if ( vio == NULL ) |
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268 | return -1; |
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269 | |
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270 | if ( (self = vio->inst) == NULL ) |
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271 | return -1; |
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272 | |
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273 | if ( ! self->opened ) |
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274 | return -1; |
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275 | |
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276 | while(ret && count > 0) { |
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277 | int n; |
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278 | const int idx = _get_free_block(self); |
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279 | |
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280 | if (idx == -1) { |
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281 | /* debug("sleep %dms, rem %d bytes\n",internal->msPerBlock,num_bytes); */ |
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282 | Sleep(self->msPerBlock); |
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283 | continue; |
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284 | } |
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285 | |
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286 | /* Get free bytes in the block */ |
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287 | n = self->wh[idx].wh.dwBufferLength |
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288 | - self->wh[idx].count; |
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289 | |
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290 | /* debug("free in block %d : %d/%d\n", */ |
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291 | /* idx,n,internal->wh[idx].dwBufferLength); */ |
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292 | |
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293 | /* Get amount to copy */ |
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294 | if (n > (int)count) { |
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295 | n = count; |
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296 | } |
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297 | /* debug("copy = %d\n",n); */ |
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298 | |
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299 | |
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300 | |
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301 | /* Do copy */ |
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302 | CopyMemory((char*)self->wh[idx].wh.lpData |
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303 | + self->wh[idx].count, |
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304 | buf, n); |
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305 | |
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306 | /* Updates pointers and counters */ |
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307 | buf += n; |
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308 | count -= n; |
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309 | /* debug("rem = %d\n",num_bytes); */ |
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310 | self->wh[idx].count += n; |
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311 | |
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312 | /* Is this block full ? */ |
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313 | if (self->wh[idx].count |
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314 | == self->wh[idx].wh.dwBufferLength) { |
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315 | ++self->full_blocks; |
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316 | /* debug("blocks %d full, total:%d\n",internal->widx,internal->full_blocks); */ |
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317 | if (++self->widx == self->blocks) { |
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318 | self->widx = 0; |
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319 | } |
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320 | ret = _send_block(self, idx); |
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321 | } |
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322 | } |
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323 | |
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324 | ROAR_DBG("driver_wmm_write(vio=%p, buf=%p, count=%lu): ret=%i", vio, buf, (unsigned long)count, ret); |
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325 | |
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326 | /* debug("ao_wmm_play => %d rem => [%s]\n",num_bytes,ret?"success":"error"); */ |
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327 | return ret > -1 ? ret_ok : -1; |
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328 | } |
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329 | |
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330 | #endif |
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331 | |
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332 | //ll |
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