[3272] | 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 | int roar_vio_open_rtp (struct roar_vio_calls * calls, struct roar_vio_calls * dst, |
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[3274] | 38 | char * dstr, struct roar_vio_defaults * odef) { |
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| 39 | struct roar_rtp_inst * self = NULL; |
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| 40 | |
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| 41 | if ( calls == NULL || dst == NULL ) |
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| 42 | return -1; |
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| 43 | |
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| 44 | if ( (self = roar_mm_malloc(sizeof(struct roar_rtp_inst))) == NULL ) |
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| 45 | return -1; |
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| 46 | |
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| 47 | memset(self, 0, sizeof(struct roar_rtp_inst)); |
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| 48 | |
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| 49 | self->vio = dst; |
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| 50 | |
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| 51 | self->header.version = 2; |
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| 52 | self->header.payload_type = ROAR_RTP_PT_UNKNOWN; |
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| 53 | |
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| 54 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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| 55 | |
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| 56 | calls->inst = self; |
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| 57 | // calls->read = roar_vio_rtp_read; |
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| 58 | // calls->write = roar_vio_rtp_write; |
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| 59 | // calls->lseek = roar_vio_rtp_lseek; |
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| 60 | calls->nonblock = roar_vio_rtp_nonblock; |
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| 61 | calls->sync = roar_vio_rtp_sync; |
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| 62 | calls->ctl = roar_vio_rtp_ctl; |
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| 63 | calls->close = roar_vio_rtp_close; |
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| 64 | |
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| 65 | return 0; |
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| 66 | } |
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[3272] | 67 | |
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| 68 | ssize_t roar_vio_rtp_read (struct roar_vio_calls * vio, void *buf, size_t count); |
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[3275] | 69 | ssize_t roar_vio_rtp_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 70 | struct roar_rtp_inst * self = vio->inst; |
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| 71 | size_t len_need = count + sizeof(struct roar_rtp_header); // this is a bit more than we need |
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| 72 | // we ignore this at the moment |
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| 73 | size_t len_have; |
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| 74 | union { |
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| 75 | void * vp; |
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| 76 | char * cp; |
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| 77 | uint16_t * u16; |
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| 78 | uint32_t * u32; |
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| 79 | } data; |
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| 80 | size_t dataoffset; |
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| 81 | ssize_t ret; |
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| 82 | int i; |
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| 83 | |
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| 84 | if ( self->tx == NULL ) { |
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| 85 | if ( roar_buffer_new(&(self->tx), len_need) == -1 ) |
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| 86 | return -1; |
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| 87 | |
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| 88 | len_have = len_need; |
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| 89 | } else { |
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| 90 | if ( roar_buffer_get_len(self->tx, &len_have) == -1 ) |
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| 91 | return -1; |
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| 92 | |
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| 93 | if ( len_have < len_need ) { |
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| 94 | if ( roar_buffer_set_len(self->tx, len_need) == -1 ) { |
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| 95 | if ( roar_buffer_free(self->tx) == -1 ) |
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| 96 | return -1; |
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| 97 | |
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| 98 | self->tx = NULL; |
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| 99 | return roar_vio_rtp_write(vio, buf, count); // restart ower self from the beginning with no buffer |
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| 100 | } |
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| 101 | } |
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| 102 | } |
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| 103 | |
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| 104 | if ( roar_buffer_get_data(self->tx, &(data.vp)) == -1 ) |
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| 105 | return -1; |
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| 106 | |
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| 107 | memset(data.vp, 0, len_need); |
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| 108 | |
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| 109 | data.cp[0] = 2; |
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| 110 | data.cp[0] |= self->header.csrc_count << 4; |
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| 111 | data.cp[1] |= self->header.payload_type << 1; |
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| 112 | |
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| 113 | data.u16[1] = self->header.seq_num; |
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| 114 | |
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| 115 | data.u32[1] = self->header.ts; |
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| 116 | data.u32[2] = self->header.ssrc; |
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| 117 | |
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| 118 | for (i = 0; i < self->header.csrc_count; i++) { |
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| 119 | data.u32[3+i] = self->header.csrc[i]; |
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| 120 | } |
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| 121 | |
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| 122 | dataoffset = 3*4 + self->header.csrc_count*4; |
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| 123 | |
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| 124 | memcpy(data.vp + dataoffset, buf, count); |
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| 125 | |
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| 126 | if ( (ret = roar_vio_write(self->vio, data.vp, count+dataoffset)) == -1 ) |
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| 127 | return -1; |
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| 128 | |
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| 129 | return ret - dataoffset; |
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| 130 | } |
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| 131 | |
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[3272] | 132 | off_t roar_vio_rtp_lseek (struct roar_vio_calls * vio, off_t offset, int whence); |
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[3274] | 133 | |
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| 134 | int roar_vio_rtp_nonblock(struct roar_vio_calls * vio, int state) { |
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| 135 | struct roar_rtp_inst * self = vio->inst; |
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| 136 | |
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| 137 | return roar_vio_nonblock(self->vio, state); |
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| 138 | } |
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| 139 | |
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| 140 | int roar_vio_rtp_sync (struct roar_vio_calls * vio) { |
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| 141 | struct roar_rtp_inst * self = vio->inst; |
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| 142 | |
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| 143 | return roar_vio_sync(self->vio); |
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| 144 | } |
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| 145 | |
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| 146 | int roar_vio_rtp_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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| 147 | struct roar_rtp_inst * self = vio->inst; |
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| 148 | |
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| 149 | if (vio == NULL || cmd == -1) |
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| 150 | return -1; |
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| 151 | |
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| 152 | switch (cmd) { |
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| 153 | case ROAR_VIO_CTL_GET_NEXT: |
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| 154 | *(struct roar_vio_calls **)data = self->vio; |
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| 155 | return 0; |
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| 156 | break; |
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| 157 | case ROAR_VIO_CTL_SET_NEXT: |
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| 158 | self->vio = *(struct roar_vio_calls **)data; |
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| 159 | return 0; |
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| 160 | break; |
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| 161 | } |
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| 162 | |
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| 163 | return roar_vio_ctl(self->vio, cmd, data); |
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| 164 | } |
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| 165 | |
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| 166 | int roar_vio_rtp_close (struct roar_vio_calls * vio) { |
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| 167 | struct roar_rtp_inst * self = vio->inst; |
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| 168 | int ret; |
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| 169 | |
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| 170 | ret = roar_vio_close(self->vio); |
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| 171 | |
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[3275] | 172 | if ( self->tx != NULL ) |
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| 173 | if ( roar_buffer_free(self->tx) == -1 ) |
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| 174 | ret = -1; |
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| 175 | |
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[3274] | 176 | roar_mm_free(self); |
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| 177 | |
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| 178 | return ret; |
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| 179 | } |
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[3272] | 180 | |
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| 181 | //ll |
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