1 | //ao_roar.c: |
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2 | /* |
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3 | * ao_roar - RoarAudio audio output driver for MPlayer |
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4 | * |
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5 | * Juergen Keil <jk@tools.de> |
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6 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008, 2009 |
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7 | * |
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8 | * This driver is distributed under the terms of the GPL v. 2 |
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9 | * |
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10 | */ |
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11 | |
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12 | #include <sys/types.h> |
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13 | #include <sys/time.h> |
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14 | #include <sys/socket.h> |
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15 | #include <stdio.h> |
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16 | #include <string.h> |
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17 | #include <unistd.h> |
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18 | #include <errno.h> |
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19 | #include <fcntl.h> |
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20 | #include <time.h> |
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21 | #ifdef __svr4__ |
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22 | #include <stropts.h> |
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23 | #endif |
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24 | #include <roaraudio.h> |
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25 | |
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26 | #include "config.h" |
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27 | #include "audio_out.h" |
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28 | #include "audio_out_internal.h" |
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29 | #include "libaf/af_format.h" |
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30 | #include "mp_msg.h" |
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31 | #include "help_mp.h" |
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32 | |
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33 | |
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34 | #undef ESD_DEBUG |
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35 | |
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36 | #if ESD_DEBUG |
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37 | #define dprintf(...) printf(__VA_ARGS__) |
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38 | #else |
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39 | #define dprintf(...) /**/ |
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40 | #endif |
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41 | |
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42 | |
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43 | #define ROAR_CLIENT_NAME "MPlayer" |
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44 | |
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45 | static struct roar_connection roar_con; |
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46 | static struct roar_stream roar_stream; |
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47 | static struct roar_stream_info roar_info; |
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48 | static int roar_fh; |
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49 | |
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50 | static ao_info_t info = |
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51 | { |
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52 | "RoarAudio audio output", |
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53 | "roar", |
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54 | "Philipp 'ph3-der-loewe' Schafft <lion@lion.leolix.org>", |
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55 | "" |
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56 | }; |
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57 | |
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58 | LIBAO_EXTERN(roar) |
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59 | |
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60 | /* |
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61 | * to set/get/query special features/parameters |
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62 | */ |
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63 | static int control(int cmd, void *arg) |
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64 | { |
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65 | switch (cmd) { |
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66 | case AOCONTROL_GET_VOLUME: |
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67 | case AOCONTROL_SET_VOLUME: |
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68 | return CONTROL_OK; |
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69 | default: |
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70 | return CONTROL_UNKNOWN; |
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71 | } |
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72 | } |
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73 | |
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74 | |
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75 | /* |
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76 | * open & setup audio device |
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77 | * return: 1=success 0=fail |
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78 | */ |
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79 | static int init(int rate_hz, int channels, int format, int flags) { |
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80 | int codec = ROAR_CODEC_DEFAULT; |
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81 | int bits = 16; |
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82 | |
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83 | if ( roar_simple_connect(&roar_con, NULL, ROAR_CLIENT_NAME) == -1 ) |
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84 | return 0; |
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85 | |
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86 | switch (format) { |
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87 | case AF_FORMAT_S8: |
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88 | bits = 8; |
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89 | break; |
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90 | case AF_FORMAT_U8: |
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91 | bits = 8; |
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92 | codec = ROAR_CODEC_PCM_U_LE; |
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93 | break; |
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94 | } |
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95 | |
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96 | if ( (roar_fh = roar_simple_new_stream_obj(&roar_con, &roar_stream, rate_hz, channels, bits, codec, ROAR_DIR_PLAY)) == -1 ) |
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97 | return 0; |
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98 | |
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99 | if ( roar_stream_get_info(&roar_con, &roar_stream, &roar_info) == -1 ) { |
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100 | close(roar_fh); |
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101 | return 0; |
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102 | } |
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103 | |
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104 | roar_socket_nonblock(roar_fh, ROAR_SOCKET_NONBLOCK); |
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105 | |
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106 | return 1; |
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107 | } |
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108 | |
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109 | |
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110 | /* |
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111 | * close audio device |
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112 | */ |
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113 | static void uninit(int immed) { |
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114 | if ( roar_fh != -1 ) |
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115 | close(roar_fh); |
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116 | |
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117 | roar_fh = -1; |
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118 | |
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119 | roar_disconnect(&roar_con); |
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120 | } |
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121 | |
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122 | |
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123 | /* |
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124 | * plays 'len' bytes of 'data' |
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125 | * it should round it down to outburst*n |
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126 | * return: number of bytes played |
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127 | */ |
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128 | static int play(void* data, int len, int flags) { |
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129 | int pkg = 441*2*2; |
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130 | int ret = 0; |
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131 | int r; |
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132 | |
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133 | while (len > 0) { |
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134 | if ( (r = write(roar_fh, data, pkg < len ? pkg : len)) > 0 ) { |
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135 | len -= r; |
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136 | data += r; |
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137 | ret += r; |
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138 | } else { |
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139 | break; |
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140 | } |
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141 | } |
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142 | |
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143 | // ROAR_WARN("play(*) = %i", ret); |
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144 | |
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145 | return ret; |
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146 | } |
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147 | |
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148 | |
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149 | /* |
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150 | * stop playing, keep buffers (for pause) |
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151 | */ |
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152 | static void audio_pause(void) |
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153 | { |
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154 | /* |
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155 | * not possible with esd. the esd daemom will continue playing |
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156 | * buffered data (not more than ESD_MAX_DELAY seconds of samples) |
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157 | */ |
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158 | } |
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159 | |
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160 | |
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161 | /* |
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162 | * resume playing, after audio_pause() |
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163 | */ |
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164 | static void audio_resume(void) |
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165 | { |
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166 | /* |
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167 | * not possible with esd. |
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168 | * |
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169 | * Let's hope the pause was long enough that the esd ran out of |
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170 | * buffered data; we restart our time based delay computation |
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171 | * for an audio resume. |
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172 | */ |
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173 | } |
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174 | |
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175 | |
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176 | /* |
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177 | * stop playing and empty buffers (for seeking/pause) |
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178 | */ |
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179 | static void reset(void) { |
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180 | } |
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181 | |
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182 | |
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183 | /* |
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184 | * return: how many bytes can be played without blocking |
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185 | */ |
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186 | static int get_space(void) { |
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187 | fd_set sl; |
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188 | struct timeval tv; |
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189 | int r; |
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190 | |
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191 | FD_ZERO(&sl); |
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192 | FD_SET(roar_fh, &sl); |
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193 | |
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194 | tv.tv_sec = 0; |
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195 | tv.tv_usec = 1; |
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196 | |
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197 | if ((r = select(roar_fh + 1, NULL, &sl, NULL, &tv)) > 0) { |
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198 | return roar_info.block_size; |
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199 | } |
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200 | return 0; |
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201 | } |
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202 | |
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203 | |
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204 | /* |
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205 | * return: delay in seconds between first and last sample in buffer |
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206 | */ |
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207 | static float get_delay(void) { |
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208 | return 0.02; |
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209 | } |
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