1 | //vio_buffer_store.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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5 | * |
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6 | * This file is part of libroar 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 | * libroar 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, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | int roar_vio_open_buffer_store (struct roar_vio_calls * calls, struct roar_vio_buffer_store ** inst) { |
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39 | struct roar_vio_buffer_store * self; |
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40 | |
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41 | if ( calls == NULL ) |
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42 | return -1; |
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43 | |
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44 | self = roar_mm_malloc(sizeof(struct roar_vio_buffer_store)); |
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45 | |
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46 | if ( self == NULL ) |
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47 | return -1; |
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48 | |
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49 | memset(self, 0, sizeof(struct roar_vio_buffer_store)); |
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50 | |
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51 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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52 | calls->flags = ROAR_VIO_FLAGS_NONE; |
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53 | calls->refc = 1; |
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54 | |
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55 | if ( inst != NULL ) |
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56 | *inst = self; |
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57 | |
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58 | calls->inst = self; |
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59 | calls->close = roar_vio_buffer_store_close; |
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60 | calls->sync = roar_vio_buffer_store_sync; |
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61 | calls->ctl = roar_vio_buffer_store_ctl; |
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62 | calls->write = roar_vio_buffer_store_write; |
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63 | calls->read = roar_vio_buffer_store_read; |
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64 | calls->lseek = roar_vio_buffer_store_lseek; |
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65 | |
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66 | return 0; |
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67 | } |
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68 | |
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69 | int roar_vio_buffer_store_close (struct roar_vio_calls * vio) { |
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70 | struct roar_vio_buffer_store * self = vio->inst; |
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71 | int ret = 0; |
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72 | |
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73 | if ( self->in != NULL ) |
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74 | if ( roar_buffer_free(self->in) != 0 ) |
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75 | ret = -1; |
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76 | |
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77 | if ( self->out != NULL ) |
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78 | if ( roar_buffer_free(self->out) != 0 ) |
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79 | ret = -1; |
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80 | |
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81 | return ret; |
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82 | } |
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83 | |
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84 | ssize_t roar_vio_buffer_store_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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85 | struct roar_vio_buffer_store * self = vio->inst; |
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86 | |
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87 | ROAR_DBG("roar_vio_buffer_store_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned int)count); |
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88 | |
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89 | if ( count == 0 ) |
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90 | return 0; |
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91 | |
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92 | if ( buf == NULL ) |
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93 | return -1; |
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94 | |
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95 | if ( self->out == NULL ) |
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96 | return 0; |
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97 | |
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98 | ROAR_DBG("roar_vio_buffer_store_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned int)count); |
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99 | |
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100 | if ( roar_buffer_shift_out(&(self->out), buf, &count) == -1 ) |
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101 | return -1; |
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102 | |
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103 | ROAR_DBG("roar_vio_buffer_store_read(*) = %llu", (long long unsigned int)count); |
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104 | |
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105 | return count; |
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106 | } |
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107 | |
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108 | ssize_t roar_vio_buffer_store_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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109 | struct roar_vio_buffer_store * self = vio->inst; |
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110 | struct roar_buffer * nbuf; |
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111 | void * data; |
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112 | |
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113 | if ( count == 0 ) |
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114 | return 0; |
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115 | |
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116 | if ( buf == NULL ) |
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117 | return -1; |
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118 | |
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119 | if ( roar_buffer_new_data(&nbuf, count, &data) == -1 ) |
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120 | return -1; |
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121 | |
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122 | memcpy(data, buf, count); |
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123 | |
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124 | if ( self->in == NULL ) { |
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125 | self->in = nbuf; |
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126 | } else { |
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127 | if ( roar_buffer_moveinto(self->in, &nbuf) == -1 ) { |
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128 | roar_buffer_free(nbuf); |
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129 | return -1; |
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130 | } |
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131 | } |
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132 | |
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133 | return count; |
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134 | } |
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135 | |
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136 | roar_off_t roar_vio_buffer_store_lseek (struct roar_vio_calls * vio, roar_off_t offset, int whence) { |
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137 | // TODO: implement support to seek forward as wide as the buffer allows us to seek. |
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138 | return (roar_off_t)-1; |
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139 | } |
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140 | |
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141 | int roar_vio_buffer_store_sync (struct roar_vio_calls * vio) { |
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142 | return 0; // we are always sync. |
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143 | } |
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144 | |
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145 | int roar_vio_buffer_store_ctl (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) { |
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146 | if (vio == NULL || cmd == -1) |
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147 | return -1; |
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148 | |
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149 | ROAR_DBG("roar_vio_buffer_store_ctl(vio=%p, cmd=0x%.8x, data=%p) = ?", vio, cmd, data); |
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150 | |
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151 | switch (cmd) { |
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152 | case ROAR_VIO_CTL_GET_NAME: |
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153 | if ( data == NULL ) |
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154 | return -1; |
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155 | |
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156 | *(char**)data = "buffer_store"; |
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157 | return 0; |
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158 | break; |
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159 | case ROAR_VIO_CTL_NONBLOCK: |
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160 | return 0; // if we are in nonblock or not is the same for us. |
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161 | break; |
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162 | } |
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163 | |
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164 | return -1; |
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165 | } |
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166 | |
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167 | //ll |
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