1 | //vio_rtp.h: |
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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, 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 | #ifndef _LIBROARVIO_RTP_H_ |
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37 | #define _LIBROARVIO_RTP_H_ |
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38 | |
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39 | #include "libroar.h" |
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40 | |
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41 | #define ROAR_RTP_FLAG_PADDING 0x02 |
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42 | #define ROAR_RTP_FLAG_EXTENSION 0x03 |
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43 | #define ROAR_RTP_FLAG_MARKER 0x08 |
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44 | |
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45 | /* |
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46 | RFC 3551 RTP A/V Profile July 2003 |
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47 | |
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48 | |
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49 | PT encoding media type clock rate channels |
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50 | name (Hz) |
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51 | ___________________________________________________ |
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52 | 0 PCMU A 8,000 1 |
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53 | 1 reserved A |
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54 | 2 reserved A |
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55 | 3 GSM A 8,000 1 |
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56 | 4 G723 A 8,000 1 |
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57 | 5 DVI4 A 8,000 1 |
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58 | 6 DVI4 A 16,000 1 |
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59 | 7 LPC A 8,000 1 |
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60 | 8 PCMA A 8,000 1 |
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61 | 9 G722 A 8,000 1 |
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62 | 10 L16 A 44,100 2 |
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63 | 11 L16 A 44,100 1 |
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64 | 12 QCELP A 8,000 1 |
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65 | 13 CN A 8,000 1 |
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66 | 14 MPA A 90,000 (see text) |
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67 | 15 G728 A 8,000 1 |
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68 | 16 DVI4 A 11,025 1 |
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69 | 17 DVI4 A 22,050 1 |
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70 | 18 G729 A 8,000 1 |
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71 | 19 reserved A |
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72 | 20 unassigned A |
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73 | 21 unassigned A |
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74 | 22 unassigned A |
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75 | 23 unassigned A |
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76 | dyn G726-40 A 8,000 1 |
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77 | dyn G726-32 A 8,000 1 |
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78 | dyn G726-24 A 8,000 1 |
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79 | dyn G726-16 A 8,000 1 |
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80 | dyn G729D A 8,000 1 |
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81 | dyn G729E A 8,000 1 |
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82 | dyn GSM-EFR A 8,000 1 |
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83 | dyn L8 A var. var. |
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84 | dyn RED A (see text) |
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85 | dyn VDVI A var. 1 |
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86 | |
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87 | Table 4: Payload types (PT) for audio encodings |
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88 | */ |
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89 | |
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90 | #define ROAR_RTP_PT_A_PCMU 0 /* mu-Law */ |
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91 | #define ROAR_RTP_PT_A_PCMA 8 /* A-Law */ |
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92 | #define ROAR_RTP_PT_A_L16_441_2 10 |
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93 | #define ROAR_RTP_PT_A_L16_441_1 11 |
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94 | #define ROAR_RTP_PT_UNKNOWN 127 /* non standard asignment */ |
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95 | |
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96 | struct roar_rtp_header { |
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97 | int version; |
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98 | int flags; |
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99 | int csrc_count; |
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100 | int payload_type; |
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101 | uint16_t seq_num; |
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102 | uint32_t ts; |
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103 | uint32_t ssrc; |
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104 | uint32_t csrc[16]; |
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105 | }; |
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106 | |
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107 | struct roar_rtp_inst { |
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108 | struct roar_vio_calls * vio; |
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109 | struct roar_rtp_header header; |
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110 | struct roar_buffer * io; |
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111 | struct roar_audio_info info; |
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112 | size_t mtu; |
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113 | int bpf; // byte per frame |
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114 | |
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115 | // read speific things |
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116 | struct roar_buffer * rx_decoded; // buffer to hold allready decoded data |
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117 | }; |
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118 | |
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119 | int roar_vio_open_rtp (struct roar_vio_calls * calls, struct roar_vio_calls * dst, |
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120 | char * dstr, struct roar_vio_defaults * odef); |
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121 | |
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122 | ssize_t roar_vio_rtp_read (struct roar_vio_calls * vio, void *buf, size_t count); |
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123 | ssize_t roar_vio_rtp_write (struct roar_vio_calls * vio, void *buf, size_t count); |
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124 | off_t roar_vio_rtp_lseek (struct roar_vio_calls * vio, off_t offset, int whence); |
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125 | int roar_vio_rtp_nonblock(struct roar_vio_calls * vio, int state); |
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126 | int roar_vio_rtp_sync (struct roar_vio_calls * vio); |
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127 | int roar_vio_rtp_ctl (struct roar_vio_calls * vio, int cmd, void * data); |
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128 | int roar_vio_rtp_close (struct roar_vio_calls * vio); |
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129 | |
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130 | #endif |
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131 | |
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132 | //ll |
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