1 | //streams.c: |
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2 | |
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3 | #include "roard.h" |
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4 | |
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5 | int streams_init (void) { |
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6 | int i; |
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7 | |
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8 | for (i = 0; i < ROAR_STREAMS_MAX; i++) |
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9 | g_streams[i] = NULL; |
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10 | |
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11 | return 0; |
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12 | } |
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13 | |
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14 | int streams_free (void) { |
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15 | int i; |
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16 | |
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17 | for (i = 0; i < ROAR_STREAMS_MAX; i++) { |
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18 | if ( g_streams[i] != NULL ) { |
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19 | streams_delete(i); |
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20 | } |
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21 | } |
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22 | |
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23 | return 0; |
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24 | } |
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25 | |
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26 | |
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27 | int streams_new (void) { |
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28 | int i, j; |
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29 | struct roar_stream * n = NULL; |
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30 | |
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31 | for (i = 0; i < ROAR_STREAMS_MAX; i++) { |
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32 | if ( g_streams[i] == NULL ) { |
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33 | n = malloc(sizeof(struct roar_stream_server)); |
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34 | if ( n == NULL ) { |
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35 | ROAR_ERR("streams_new(void): can not allocate memory for new stream: %s", strerror(errno)); |
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36 | ROAR_DBG("streams_new(void) = -1"); |
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37 | return -1; |
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38 | } |
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39 | |
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40 | n->id = i; |
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41 | n->fh = -1; |
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42 | // n->pos_rel_id = i; |
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43 | n->database = NULL; |
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44 | n->dataoff = NULL; |
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45 | n->datalen = 0; |
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46 | n->offset = 0; |
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47 | |
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48 | ((struct roar_stream_server*)n)->client = -1; |
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49 | ((struct roar_stream_server*)n)->buffer = NULL; |
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50 | ((struct roar_stream_server*)n)->need_extra = 0; |
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51 | ((struct roar_stream_server*)n)->output = NULL; |
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52 | ((struct roar_stream_server*)n)->mixer.scale = 65535; |
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53 | for (j = 0; j < ROAR_MAX_CHANNELS; j++) |
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54 | ((struct roar_stream_server*)n)->mixer.mixer[j] = 65535; |
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55 | |
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56 | g_streams[i] = (struct roar_stream_server*)n; |
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57 | ROAR_DBG("streams_new(void) = %i", i); |
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58 | return i; |
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59 | } |
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60 | } |
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61 | |
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62 | return -1; |
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63 | } |
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64 | |
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65 | int streams_delete (int id) { |
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66 | if ( g_streams[id] == NULL ) |
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67 | return 0; |
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68 | |
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69 | ROAR_DBG("streams_delete(id=%i) = ?", id); |
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70 | |
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71 | if ( g_streams[id]->client != -1 ) { |
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72 | ROAR_DBG("streams_delete(id=%i): Stream is owned by client %i", id, g_streams[id]->client); |
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73 | client_stream_delete(g_streams[id]->client, id); |
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74 | } |
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75 | |
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76 | if ( g_streams[id]->buffer != NULL ) |
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77 | roar_buffer_free(g_streams[id]->buffer); |
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78 | |
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79 | if ( g_streams[id]->output != NULL ) |
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80 | free(g_streams[id]->output); |
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81 | |
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82 | if ( ROAR_STREAM(g_streams[id])->fh != -1 ) |
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83 | close(ROAR_STREAM(g_streams[id])->fh); |
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84 | |
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85 | free(g_streams[id]); |
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86 | |
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87 | g_streams[id] = NULL; |
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88 | |
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89 | ROAR_DBG("streams_delete(id=%i) = 0", id); |
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90 | return 0; |
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91 | } |
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92 | |
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93 | int streams_set_client (int id, int client) { |
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94 | if ( g_streams[id] == NULL ) |
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95 | return -1; |
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96 | |
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97 | g_streams[id]->client = client; |
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98 | |
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99 | return 0; |
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100 | } |
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101 | |
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102 | int streams_set_fh (int id, int fh) { |
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103 | int dir; |
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104 | |
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105 | if ( g_streams[id] == NULL ) |
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106 | return -1; |
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107 | |
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108 | ((struct roar_stream *)g_streams[id])->fh = fh; |
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109 | |
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110 | dir = ((struct roar_stream *)g_streams[id])->dir; |
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111 | |
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112 | if ( dir == ROAR_DIR_MONITOR || dir == ROAR_DIR_RECORD ) { |
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113 | shutdown(fh, SHUT_RD); |
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114 | } |
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115 | |
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116 | if ( dir == ROAR_DIR_FILTER ) { |
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117 | return 0; |
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118 | } else { |
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119 | return roar_socket_nonblock(fh, ROAR_SOCKET_NONBLOCK); |
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120 | } |
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121 | } |
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122 | |
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123 | int streams_get_fh (int id) { |
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124 | if ( id < 0 ) |
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125 | return -1; |
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126 | |
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127 | if ( g_streams[id] == NULL ) |
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128 | return -1; |
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129 | |
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130 | return ((struct roar_stream *)g_streams[id])->fh; |
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131 | } |
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132 | |
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133 | int streams_get (int id, struct roar_stream_server ** stream) { |
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134 | if ( g_streams[id] == NULL ) |
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135 | return -1; |
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136 | |
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137 | *stream = g_streams[id]; |
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138 | |
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139 | return 0; |
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140 | } |
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141 | |
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142 | |
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143 | int streams_get_outputbuffer (int id, void ** buffer, size_t size) { |
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144 | if ( g_streams[id] == NULL ) |
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145 | return -1; |
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146 | |
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147 | // output buffer size does never change. |
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148 | if ( g_streams[id]->output != NULL ) { |
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149 | *buffer = g_streams[id]->output; |
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150 | return 0; |
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151 | } |
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152 | |
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153 | if ( (g_streams[id]->output = malloc(size)) == NULL ) { |
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154 | ROAR_ERR("streams_get_outputbuffer(*): Can not alloc: %s", strerror(errno)); |
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155 | return -1; |
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156 | } |
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157 | |
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158 | *buffer = g_streams[id]->output; |
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159 | |
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160 | return 0; |
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161 | } |
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162 | |
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163 | int streams_fill_mixbuffer (int id, struct roar_audio_info * info) { |
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164 | // TODO: decide: is this the most complex, hacked, un-understadable, |
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165 | // un-writeable and even worse: un-readable |
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166 | // function in the whole project? |
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167 | size_t todo = ROAR_OUTPUT_CALC_OUTBUFSIZE(info); |
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168 | size_t todo_in; |
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169 | size_t len, outlen; |
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170 | size_t mul = 1, div = 1; |
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171 | void * rest = NULL; |
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172 | void * in = NULL; |
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173 | struct roar_buffer * buf; |
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174 | struct roar_audio_info * stream_info; |
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175 | int is_the_same = 0; |
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176 | |
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177 | if ( g_streams[id] == NULL ) |
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178 | return -1; |
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179 | |
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180 | if ( streams_get_outputbuffer(id, &rest, todo) == -1 ) { |
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181 | return -1; |
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182 | } |
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183 | |
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184 | if ( rest == NULL ) { |
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185 | return -1; |
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186 | } |
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187 | |
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188 | // set up stream_info |
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189 | |
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190 | stream_info = &(((struct roar_stream*)g_streams[id])->info); |
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191 | |
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192 | // calc todo_in |
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193 | todo_in = ROAR_OUTPUT_CALC_OUTBUFSIZE(stream_info); |
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194 | |
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195 | // calc mul and div: |
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196 | mul = todo / todo_in; |
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197 | div = todo_in / todo; |
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198 | |
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199 | if ( mul == 0 ) { |
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200 | mul = 1; |
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201 | } else { |
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202 | div = 1; |
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203 | } |
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204 | |
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205 | ROAR_DBG("streams_fill_mixbuffer(*): mul=%i, div=%i", mul, div); |
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206 | |
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207 | ROAR_DBG("streams_fill_mixbuffer(*): rest=%p, todo=%i->%i (in->out)", rest, todo_in, todo); |
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208 | // are both (input and output) of same format? |
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209 | |
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210 | |
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211 | ROAR_DBG("streams_fill_mixbuffer(*): stream_info:"); |
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212 | roar_debug_audio_info_print(stream_info); |
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213 | ROAR_DBG("streams_fill_mixbuffer(*): info:"); |
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214 | roar_debug_audio_info_print(info); |
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215 | |
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216 | is_the_same = stream_info->rate == info->rate && stream_info->bits == info->bits && |
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217 | stream_info->channels == info->channels && stream_info->codec == info->codec; |
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218 | |
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219 | ROAR_DBG("streams_fill_mixbuffer(*): is_the_same=%i", is_the_same); |
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220 | |
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221 | /* How it works: |
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222 | * |
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223 | * set a counter to the number of samples we need. |
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224 | * loop until we have all samples done or no samples are |
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225 | * left in our input buffer. |
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226 | * If there a no samples left in the input buffer: fill the rest |
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227 | * of the output buffer with zeros. |
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228 | * |
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229 | * The loop: |
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230 | * get a buffer from the input. |
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231 | * if it's bigger than needed, set an offset. |
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232 | * The rest of the data: |
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233 | * 0) convert endianness (codec) from remote to local... |
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234 | * 1) change bits in of the samples |
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235 | * 2) change sample rate |
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236 | * 3) change the nummber of channels |
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237 | * 4) insert into output buffer |
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238 | */ |
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239 | |
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240 | /* |
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241 | // get our first buffer: |
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242 | |
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243 | if ( stream_shift_buffer(id, &buf) == -1 ) { |
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244 | return -1; |
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245 | } |
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246 | |
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247 | // first test for some basic simple cases... |
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248 | |
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249 | if ( buf == NULL ) { // we habe nothing in input queue |
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250 | // we may memset() our output buffer OR |
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251 | // just return with -1 so we are going to |
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252 | // be ignored. |
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253 | return -1; |
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254 | } |
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255 | */ |
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256 | |
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257 | while (todo) { // main loop |
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258 | ROAR_DBG("streams_fill_mixbuffer(*): looping..."); |
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259 | // exit loop if nothing is left, even if we need more data.. |
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260 | if ( stream_shift_buffer(id, &buf) == -1 ) |
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261 | break; |
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262 | if ( buf == NULL ) |
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263 | break; |
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264 | |
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265 | // read the data for this loop... |
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266 | roar_buffer_get_data(buf, &in); |
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267 | roar_buffer_get_len(buf, &len); |
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268 | |
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269 | ROAR_DBG("streams_fill_mixbuffer(*): len = %i", len); |
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270 | |
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271 | if ( len > todo_in ) { |
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272 | roar_buffer_set_offset(buf, todo_in); |
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273 | len = todo_in; |
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274 | } else { |
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275 | roar_buffer_set_len(buf, 0); // queue for deletation |
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276 | } |
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277 | |
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278 | // we now have 'len' bytes in 'in' |
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279 | |
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280 | // calc how much outlen this has... |
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281 | outlen = (len * mul) / div; |
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282 | |
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283 | ROAR_DBG("streams_fill_mixbuffer(*): outlen = %i, buf = %p, len = %i", outlen, in, len); |
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284 | |
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285 | if ( is_the_same ) { |
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286 | /* |
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287 | * 0) convert endianness (codec) from remote to local... |
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288 | * 1) change bits in of the samples |
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289 | * 2) change sample rate |
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290 | * 3) change the nummber of channels |
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291 | \\==> skiping,... |
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292 | */ |
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293 | // * 4) insert into output buffer |
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294 | ROAR_DBG("streams_fill_mixbuffer(*): memcpy: in->rest: %p -> %p", in, rest); |
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295 | if ( memcpy(rest, in, len) != rest ) { |
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296 | ROAR_ERR("streams_fill_mixbuffer(*): memcpy returned invalid pointer."); |
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297 | } |
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298 | |
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299 | } else { |
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300 | |
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301 | /* |
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302 | // * 0) convert endianness (codec) from remote to local... |
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303 | if ( stream_info->codec != info->codec ) { |
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304 | // we neet to convert... |
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305 | return -1; |
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306 | } |
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307 | |
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308 | // * 1) change bits in of the samples |
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309 | if ( stream_info->bits != info->bits ) { |
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310 | return -1; |
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311 | } |
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312 | |
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313 | // * 2) change sample rate |
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314 | if ( stream_info->rate != info->rate ) { |
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315 | return -1; |
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316 | } |
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317 | |
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318 | // * 3) change the nummber of channels |
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319 | if ( stream_info->channels != info->channels ) { |
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320 | return -1; |
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321 | } |
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322 | |
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323 | // * 4) insert into output buffer |
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324 | */ |
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325 | // hey! we have roar_conv() :) |
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326 | |
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327 | if ( roar_conv(rest, in, 8*len / stream_info->bits, stream_info, info) == -1 ) |
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328 | return -1; |
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329 | } |
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330 | |
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331 | if ( change_vol(rest, info->bits, rest, 8*outlen / info->bits, info->channels, &(((struct roar_stream_server*)g_streams[id])->mixer)) == -1 ) |
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332 | return -1; |
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333 | |
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334 | // we habe outlen bytes more... |
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335 | todo -= outlen; |
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336 | rest += outlen; |
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337 | todo_in -= len; |
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338 | |
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339 | roar_buffer_get_len(buf, &len); |
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340 | ROAR_DBG("streams_fill_mixbuffer(*): New length of buffer %p is %i", buf, len); |
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341 | if ( len == 0 ) |
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342 | roar_buffer_delete(buf, NULL); |
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343 | } |
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344 | |
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345 | //len = 0; |
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346 | //buffer_get_len(buf, &len); |
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347 | |
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348 | /* |
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349 | if ( len > 0 ) // we still have some data in this buffer, re-inserting it to the input buffers... |
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350 | stream_unshift_buffer(id, buf); |
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351 | else |
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352 | buffer_delete(buf, NULL); |
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353 | */ |
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354 | |
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355 | if ( todo > 0 ) { // zeroize the rest of teh buffer |
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356 | memset(rest, 0, todo); |
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357 | ROAR_ERR("streams_fill_mixbuffer(*): Underrun in stream: %i bytes missing, filling with zeros", todo); |
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358 | } |
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359 | |
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360 | return 0; |
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361 | } |
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362 | |
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363 | |
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364 | int streams_get_mixbuffers (void *** bufferlist, struct roar_audio_info * info, unsigned int pos) { |
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365 | static void * bufs[ROAR_STREAMS_MAX+1]; |
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366 | int i; |
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367 | int have = 0; |
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368 | |
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369 | for (i = 0; i < ROAR_STREAMS_MAX; i++) { |
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370 | if ( g_streams[i] != NULL ) { |
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371 | if ( ((struct roar_stream *)g_streams[i])->dir != ROAR_DIR_PLAY ) |
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372 | continue; |
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373 | |
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374 | if ( streams_get_outputbuffer(i, &bufs[have], ROAR_OUTPUT_CALC_OUTBUFSIZE(info)) == -1 ) { |
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375 | ROAR_ERR("streams_get_mixbuffer(*): Can not alloc output buffer for stream %i, BAD!", i); |
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376 | ROAR_ERR("streams_get_mixbuffer(*): Ignoring stream for this round."); |
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377 | continue; |
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378 | } |
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379 | if ( streams_fill_mixbuffer(i, info) == -1 ) { |
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380 | ROAR_ERR("streams_get_mixbuffer(*): Can not fill output buffer for stream %i, this should not happen", i); |
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381 | continue; |
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382 | } |
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383 | |
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384 | ROAR_DBG("streams_get_mixbuffers(*): bufs[have] = %p", bufs[have]); |
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385 | ROAR_DBG("streams_get_mixbuffers(*): *bufs[have] = 0x%08x...", *(uint32_t*)bufs[have]); |
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386 | |
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387 | have++; // we have a new stream! |
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388 | } |
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389 | } |
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390 | |
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391 | bufs[have] = NULL; |
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392 | |
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393 | ROAR_DBG("streams_get_mixbuffers(*): have = %i", have); |
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394 | |
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395 | *bufferlist = bufs; |
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396 | return 0; |
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397 | } |
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398 | |
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399 | |
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400 | int stream_add_buffer (int id, struct roar_buffer * buf) { |
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401 | ROAR_DBG("stream_add_buffer(id=%i, buf=%p) = ?", id, buf); |
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402 | |
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403 | if ( g_streams[id] == NULL ) |
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404 | return -1; |
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405 | |
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406 | if ( g_streams[id]->buffer == NULL ) { |
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407 | g_streams[id]->buffer = buf; |
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408 | ROAR_DBG("stream_add_buffer(id=%i, buf=%p) = 0", id, buf); |
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409 | return 0; |
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410 | } |
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411 | |
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412 | ROAR_DBG("stream_add_buffer(id=%i, buf=%p) = ?", id, buf); |
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413 | return roar_buffer_add(g_streams[id]->buffer, buf); |
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414 | } |
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415 | |
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416 | int stream_shift_buffer (int id, struct roar_buffer ** buf) { |
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417 | struct roar_buffer * next; |
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418 | |
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419 | if ( g_streams[id] == NULL ) |
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420 | return -1; |
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421 | |
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422 | if ( g_streams[id]->buffer == NULL ) { |
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423 | *buf = NULL; |
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424 | return 0; |
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425 | } |
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426 | |
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427 | roar_buffer_get_next(g_streams[id]->buffer, &next); |
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428 | |
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429 | *buf = g_streams[id]->buffer; |
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430 | g_streams[id]->buffer = next; |
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431 | |
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432 | return 0; |
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433 | } |
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434 | int stream_unshift_buffer (int id, struct roar_buffer * buf) { |
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435 | if ( g_streams[id] == NULL ) |
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436 | return -1; |
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437 | |
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438 | if ( g_streams[id]->buffer == NULL ) { |
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439 | g_streams[id]->buffer = buf; |
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440 | return 0; |
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441 | } |
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442 | |
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443 | roar_buffer_add(buf, g_streams[id]->buffer); |
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444 | |
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445 | g_streams[id]->buffer = buf; |
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446 | |
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447 | return 0; |
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448 | } |
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449 | |
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450 | int streams_check (int id) { |
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451 | int fh; |
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452 | size_t req; |
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453 | struct roar_stream * s; |
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454 | struct roar_stream_server * ss; |
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455 | struct roar_buffer * b; |
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456 | char * buf; |
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457 | |
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458 | if ( g_streams[id] == NULL ) |
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459 | return -1; |
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460 | |
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461 | ROAR_DBG("streams_check(id=%i) = ?", id); |
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462 | |
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463 | s = (struct roar_stream *) (ss = g_streams[id]); |
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464 | |
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465 | if ( (fh = s->fh) == -1 ) |
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466 | return 0; |
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467 | |
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468 | if ( s->dir != ROAR_DIR_PLAY ) |
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469 | return 0; |
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470 | |
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471 | ROAR_DBG("streams_check(id=%i): fh = %i", id, fh); |
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472 | |
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473 | req = ROAR_OUTPUT_BUFFER_SAMPLES * s->info.channels * s->info.bits / 8; // optimal size |
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474 | req += ss->need_extra; // bytes left we sould get.... |
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475 | |
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476 | if ( roar_buffer_new(&b, req) == -1 ) { |
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477 | ROAR_ERR("streams_check(*): Can not alloc buffer space!"); |
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478 | ROAR_DBG("streams_check(*) = -1"); |
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479 | return -1; |
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480 | } |
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481 | |
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482 | roar_buffer_get_data(b, (void **)&buf); |
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483 | |
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484 | ROAR_DBG("streams_check(id=%i): buffer is up and ready ;)", id); |
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485 | |
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486 | if ( (req = read(fh, buf, req)) > 0 ) { |
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487 | ROAR_DBG("streams_check(id=%i): got %i bytes", id, req); |
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488 | |
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489 | roar_buffer_set_len(b, req); |
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490 | |
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491 | if ( stream_add_buffer(id, b) != -1 ) |
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492 | return 0; |
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493 | |
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494 | ROAR_ERR("streams_check(id=%i): something is wrong, could not add buffer to stream!", id); |
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495 | roar_buffer_free(b); |
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496 | } else { |
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497 | ROAR_DBG("streams_check(id=%i): EOF!", id); |
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498 | roar_buffer_free(b); |
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499 | streams_delete(id); |
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500 | ROAR_DBG("streams_check(id=%i) = 0", id); |
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501 | return 0; |
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502 | } |
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503 | |
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504 | |
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505 | ROAR_DBG("streams_check(id=%i) = -1", id); |
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506 | return -1; |
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507 | } |
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508 | |
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509 | |
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510 | int streams_send_mon (int id) { |
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511 | int fh; |
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512 | struct roar_stream * s; |
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513 | struct roar_stream_server * ss; |
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514 | |
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515 | if ( g_streams[id] == NULL ) |
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516 | return -1; |
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517 | |
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518 | ROAR_DBG("streams_send_mon(id=%i) = ?", id); |
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519 | |
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520 | s = (struct roar_stream *) (ss = g_streams[id]); |
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521 | |
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522 | if ( (fh = s->fh) == -1 ) |
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523 | return 0; |
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524 | |
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525 | if ( s->dir != ROAR_DIR_MONITOR ) |
---|
526 | return 0; |
---|
527 | |
---|
528 | ROAR_DBG("streams_send_mon(id=%i): fh = %i", id, fh); |
---|
529 | |
---|
530 | if ( write(fh, g_output_buffer, g_output_buffer_len) == g_output_buffer_len ) |
---|
531 | return 0; |
---|
532 | |
---|
533 | // ug... error... delete stream! |
---|
534 | |
---|
535 | streams_delete(id); |
---|
536 | |
---|
537 | return -1; |
---|
538 | } |
---|
539 | |
---|
540 | int streams_send_filter(int id) { |
---|
541 | int fh; |
---|
542 | struct roar_stream * s; |
---|
543 | struct roar_stream_server * ss; |
---|
544 | |
---|
545 | if ( g_streams[id] == NULL ) |
---|
546 | return -1; |
---|
547 | |
---|
548 | ROAR_DBG("streams_send_filter(id=%i) = ?", id); |
---|
549 | |
---|
550 | s = (struct roar_stream *) (ss = g_streams[id]); |
---|
551 | |
---|
552 | if ( (fh = s->fh) == -1 ) |
---|
553 | return 0; |
---|
554 | |
---|
555 | if ( s->dir != ROAR_DIR_FILTER ) |
---|
556 | return 0; |
---|
557 | |
---|
558 | ROAR_DBG("streams_send_filter(id=%i): fh = %i", id, fh); |
---|
559 | |
---|
560 | if ( write(fh, g_output_buffer, g_output_buffer_len) == g_output_buffer_len ) { |
---|
561 | if ( read(fh, g_output_buffer, g_output_buffer_len) == g_output_buffer_len ) { |
---|
562 | return 0; |
---|
563 | } else { |
---|
564 | streams_delete(id); |
---|
565 | return -1; |
---|
566 | } |
---|
567 | } |
---|
568 | |
---|
569 | // ug... error... delete stream! |
---|
570 | |
---|
571 | streams_delete(id); |
---|
572 | |
---|
573 | return -1; |
---|
574 | } |
---|
575 | |
---|
576 | //ll |
---|