1 | //vio_rtp.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | * NOTE for everyone want's to change something and send patches: |
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24 | * read README and HACKING! There a addition information on |
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25 | * the license of this document you need to read before you send |
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26 | * any patches. |
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27 | * |
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28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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29 | * or libpulse*: |
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30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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31 | * and are therefore GPL. Because of this it may be illigal to use |
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32 | * them with any software that uses libesd, libartsc or libpulse*. |
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33 | */ |
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34 | |
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35 | #include "libroar.h" |
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36 | |
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37 | static const struct { |
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38 | int pt; |
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39 | struct roar_audio_info info; |
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40 | } _g_rtp_pt[] = { |
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41 | {ROAR_RTP_PT_A_PCMU, {.codec = ROAR_CODEC_MULAW, .bits = 8, .rate = 8000, .channels = 1}}, |
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42 | {ROAR_RTP_PT_A_PCMA, {.codec = ROAR_CODEC_ALAW, .bits = 8, .rate = 8000, .channels = 1}}, |
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43 | {ROAR_RTP_PT_A_L16_441_2, {.codec = ROAR_CODEC_PCM_S_BE, .bits = 16, .rate = 44100, .channels = 2}}, |
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44 | {ROAR_RTP_PT_A_L16_441_1, {.codec = ROAR_CODEC_PCM_S_BE, .bits = 16, .rate = 44100, .channels = 1}}, |
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45 | {-1, {-1, -1, -1}} |
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46 | }; |
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47 | |
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48 | static int _info2pt (struct roar_audio_info * info) { |
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49 | int i; |
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50 | |
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51 | for (i = 0; _g_rtp_pt[i].pt != -1; i++) { |
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52 | if ( info->codec == _g_rtp_pt[i].info.codec && |
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53 | info->bits == _g_rtp_pt[i].info.bits && |
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54 | info->rate == _g_rtp_pt[i].info.rate && |
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55 | info->channels == _g_rtp_pt[i].info.channels ) { |
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56 | return _g_rtp_pt[i].pt; |
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57 | } |
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58 | } |
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59 | |
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60 | return -1; |
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61 | } |
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62 | |
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63 | static const struct roar_audio_info * _pt2info (int pt) { |
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64 | int i; |
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65 | |
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66 | for (i = 0; _g_rtp_pt[i].pt != -1; i++) { |
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67 | if ( _g_rtp_pt[i].pt == pt ) { |
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68 | return &(_g_rtp_pt[i].info); |
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69 | } |
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70 | } |
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71 | |
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72 | return NULL; |
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73 | } |
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74 | |
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75 | int roar_vio_open_rtp (struct roar_vio_calls * calls, struct roar_vio_calls * dst, |
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76 | char * dstr, struct roar_vio_defaults * odef) { |
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77 | struct roar_rtp_inst * self = NULL; |
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78 | |
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79 | ROAR_DBG("roar_vio_open_rtp(calls=%p, dst=%p, dstr='%s', odef=%p) = ?", calls, dst, dstr, odef); |
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80 | |
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81 | if ( calls == NULL || dst == NULL ) |
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82 | return -1; |
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83 | |
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84 | if ( (self = roar_mm_malloc(sizeof(struct roar_rtp_inst))) == NULL ) |
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85 | return -1; |
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86 | |
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87 | ROAR_DBG("roar_vio_open_rtp(calls=%p, dst=%p, dstr='%s', odef=%p) = ?", calls, dst, dstr, odef); |
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88 | |
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89 | memset(self, 0, sizeof(struct roar_rtp_inst)); |
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90 | |
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91 | self->vio = dst; |
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92 | |
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93 | self->header.version = 2; |
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94 | self->header.payload_type = ROAR_RTP_PT_UNKNOWN; |
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95 | |
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96 | // TODO: init with random values: |
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97 | // Sequence Number |
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98 | // SSRC |
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99 | |
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100 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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101 | |
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102 | calls->inst = self; |
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103 | // calls->read = roar_vio_rtp_read; |
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104 | calls->write = roar_vio_rtp_write; |
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105 | // calls->lseek = roar_vio_rtp_lseek; |
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106 | calls->nonblock = roar_vio_rtp_nonblock; |
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107 | calls->sync = roar_vio_rtp_sync; |
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108 | calls->ctl = roar_vio_rtp_ctl; |
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109 | calls->close = roar_vio_rtp_close; |
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110 | |
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111 | ROAR_DBG("roar_vio_open_rtp(calls=%p, dst=%p, dstr='%s', odef=%p) = 0", calls, dst, dstr, odef); |
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112 | |
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113 | return 0; |
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114 | } |
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115 | |
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116 | ssize_t roar_vio_rtp_read (struct roar_vio_calls * vio, void *buf, size_t count); |
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117 | ssize_t roar_vio_rtp_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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118 | struct roar_rtp_inst * self = vio->inst; |
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119 | size_t len_need = count + sizeof(struct roar_rtp_header); // this is a bit more than we need |
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120 | // we ignore this at the moment |
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121 | size_t len_have; |
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122 | union { |
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123 | void * vp; |
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124 | char * cp; |
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125 | uint16_t * u16; |
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126 | uint32_t * u32; |
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127 | } data; |
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128 | size_t dataoffset; |
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129 | ssize_t ret; |
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130 | int i; |
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131 | |
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132 | ROAR_DBG("roar_vio_rtp_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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133 | |
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134 | if ( self->tx == NULL ) { |
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135 | if ( roar_buffer_new(&(self->tx), len_need) == -1 ) |
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136 | return -1; |
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137 | |
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138 | len_have = len_need; |
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139 | } else { |
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140 | if ( roar_buffer_get_len(self->tx, &len_have) == -1 ) |
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141 | return -1; |
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142 | |
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143 | if ( len_have < len_need ) { |
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144 | if ( roar_buffer_set_len(self->tx, len_need) == -1 ) { |
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145 | if ( roar_buffer_free(self->tx) == -1 ) |
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146 | return -1; |
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147 | |
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148 | self->tx = NULL; |
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149 | return roar_vio_rtp_write(vio, buf, count); // restart ower self from the beginning with no buffer |
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150 | } |
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151 | } |
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152 | } |
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153 | |
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154 | ROAR_DBG("roar_vio_rtp_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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155 | |
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156 | if ( roar_buffer_get_data(self->tx, &(data.vp)) == -1 ) |
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157 | return -1; |
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158 | |
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159 | memset(data.vp, 0, len_need); |
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160 | |
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161 | self->header.seq_num++; |
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162 | |
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163 | data.cp[0] = 2; |
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164 | data.cp[0] |= self->header.csrc_count << 4; |
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165 | data.cp[1] |= self->header.payload_type << 1; |
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166 | |
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167 | data.u16[1] = self->header.seq_num; |
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168 | |
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169 | data.u32[1] = self->header.ts; |
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170 | data.u32[2] = self->header.ssrc; |
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171 | |
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172 | for (i = 0; i < self->header.csrc_count; i++) { |
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173 | data.u32[3+i] = self->header.csrc[i]; |
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174 | } |
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175 | |
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176 | dataoffset = 3*4 + self->header.csrc_count*4; |
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177 | |
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178 | memcpy(data.vp + dataoffset, buf, count); |
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179 | |
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180 | ROAR_DBG("roar_vio_rtp_write(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned)count); |
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181 | |
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182 | if ( (ret = roar_vio_write(self->vio, data.vp, count+dataoffset)) == -1 ) |
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183 | return -1; |
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184 | |
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185 | return ret - dataoffset; |
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186 | } |
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187 | |
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188 | off_t roar_vio_rtp_lseek (struct roar_vio_calls * vio, off_t offset, int whence); |
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189 | |
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190 | int roar_vio_rtp_nonblock(struct roar_vio_calls * vio, int state) { |
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191 | struct roar_rtp_inst * self = vio->inst; |
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192 | |
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193 | ROAR_DBG("roar_vio_rtp_nonblock(vio=%p, state=%i) = ?", vio, state); |
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194 | |
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195 | return roar_vio_nonblock(self->vio, state); |
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196 | } |
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197 | |
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198 | int roar_vio_rtp_sync (struct roar_vio_calls * vio) { |
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199 | struct roar_rtp_inst * self = vio->inst; |
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200 | |
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201 | ROAR_DBG("roar_vio_rtp_sync(vio=%p) = ?", vio); |
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202 | |
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203 | return roar_vio_sync(self->vio); |
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204 | } |
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205 | |
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206 | int roar_vio_rtp_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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207 | struct roar_rtp_inst * self = vio->inst; |
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208 | struct roar_stream * s = NULL; |
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209 | struct roar_stream_server * ss = NULL; |
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210 | |
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211 | ROAR_DBG("roar_vio_rtp_ctl(vio=%p, cmd=%i, data=%p) = ?", vio, cmd, data); |
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212 | |
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213 | if (vio == NULL || cmd == -1) |
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214 | return -1; |
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215 | |
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216 | ROAR_DBG("roar_vio_rtp_ctl(vio=%p, cmd=%i, data=%p) = ?", vio, cmd, data); |
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217 | |
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218 | switch (cmd) { |
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219 | case ROAR_VIO_CTL_SET_SSTREAM: |
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220 | s = ROAR_STREAM(ss = data); |
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221 | break; |
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222 | case ROAR_VIO_CTL_SET_STREAM: |
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223 | s = ROAR_STREAM(data); |
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224 | break; |
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225 | case ROAR_VIO_CTL_GET_NEXT: |
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226 | *(struct roar_vio_calls **)data = self->vio; |
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227 | return 0; |
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228 | break; |
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229 | case ROAR_VIO_CTL_SET_NEXT: |
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230 | self->vio = *(struct roar_vio_calls **)data; |
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231 | return 0; |
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232 | break; |
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233 | } |
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234 | |
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235 | ROAR_DBG("roar_vio_rtp_ctl(vio=%p, cmd=%i, data=%p) = ?", vio, cmd, data); |
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236 | |
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237 | if ( s != NULL ) { |
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238 | self->header.payload_type = _info2pt(&(s->info)); |
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239 | roar_vio_ctl(self->vio, cmd, data); |
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240 | return 0; |
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241 | } |
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242 | |
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243 | return roar_vio_ctl(self->vio, cmd, data); |
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244 | } |
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245 | |
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246 | int roar_vio_rtp_close (struct roar_vio_calls * vio) { |
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247 | struct roar_rtp_inst * self = vio->inst; |
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248 | int ret; |
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249 | |
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250 | ROAR_DBG("roar_vio_rtp_close(vio=%p) = ?", vio); |
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251 | |
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252 | ret = roar_vio_close(self->vio); |
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253 | |
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254 | if ( self->tx != NULL ) |
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255 | if ( roar_buffer_free(self->tx) == -1 ) |
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256 | ret = -1; |
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257 | |
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258 | roar_mm_free(self); |
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259 | |
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260 | ROAR_DBG("roar_vio_rtp_close(vio=%p) = %i", vio, ret); |
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261 | |
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262 | return ret; |
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263 | } |
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264 | |
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265 | //ll |
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