[3994] | 1 | //vio_buffer_store.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, 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 | #include "libroar.h" |
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| 37 | |
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| 38 | int roar_vio_open_buffer_store (struct roar_vio_calls * calls, struct roar_vio_buffer_store ** inst) { |
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| 39 | struct roar_vio_buffer_store * self; |
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| 40 | |
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| 41 | if ( calls == NULL ) |
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| 42 | return -1; |
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| 43 | |
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| 44 | self = roar_mm_malloc(sizeof(struct roar_vio_buffer_store)); |
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| 45 | |
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| 46 | if ( self == NULL ) |
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| 47 | return -1; |
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| 48 | |
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| 49 | memset(self, 0, sizeof(struct roar_vio_buffer_store)); |
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| 50 | |
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| 51 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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| 52 | |
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[3995] | 53 | if ( inst != NULL ) |
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| 54 | *inst = self; |
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| 55 | |
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[3994] | 56 | calls->inst = self; |
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| 57 | calls->close = roar_vio_buffer_store_close; |
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| 58 | calls->nonblock = roar_vio_buffer_store_nonblock; |
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| 59 | calls->sync = roar_vio_buffer_store_sync; |
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| 60 | calls->ctl = roar_vio_buffer_store_ctl; |
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| 61 | calls->write = roar_vio_buffer_store_write; |
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| 62 | calls->read = roar_vio_buffer_store_read; |
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| 63 | calls->lseek = roar_vio_buffer_store_lseek; |
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| 64 | |
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| 65 | return 0; |
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| 66 | } |
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| 67 | |
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| 68 | int roar_vio_buffer_store_close (struct roar_vio_calls * vio) { |
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| 69 | struct roar_vio_buffer_store * self = vio->inst; |
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| 70 | int ret = 0; |
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| 71 | |
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| 72 | if ( self->in != NULL ) |
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| 73 | if ( roar_buffer_free(self->in) != 0 ) |
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| 74 | ret = -1; |
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| 75 | |
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| 76 | if ( self->out != NULL ) |
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| 77 | if ( roar_buffer_free(self->out) != 0 ) |
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| 78 | ret = -1; |
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| 79 | |
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| 80 | return ret; |
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| 81 | } |
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| 82 | |
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| 83 | ssize_t roar_vio_buffer_store_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 84 | struct roar_vio_buffer_store * self = vio->inst; |
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| 85 | |
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[3995] | 86 | ROAR_DBG("roar_vio_buffer_store_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned int)count); |
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| 87 | |
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[3994] | 88 | if ( count == 0 ) |
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| 89 | return 0; |
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| 90 | |
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| 91 | if ( buf == NULL ) |
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| 92 | return -1; |
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| 93 | |
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| 94 | if ( self->out == NULL ) |
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| 95 | return 0; |
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| 96 | |
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[3995] | 97 | ROAR_DBG("roar_vio_buffer_store_read(vio=%p, buf=%p, count=%llu) = ?", vio, buf, (long long unsigned int)count); |
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| 98 | |
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[3994] | 99 | if ( roar_buffer_shift_out(&(self->out), buf, &count) == -1 ) |
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| 100 | return -1; |
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| 101 | |
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[3995] | 102 | ROAR_DBG("roar_vio_buffer_store_read(*) = %llu", (long long unsigned int)count); |
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| 103 | |
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[3994] | 104 | return count; |
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| 105 | } |
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| 106 | |
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| 107 | ssize_t roar_vio_buffer_store_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 108 | struct roar_vio_buffer_store * self = vio->inst; |
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| 109 | struct roar_buffer * nbuf; |
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| 110 | void * data; |
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| 111 | |
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| 112 | if ( count == 0 ) |
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| 113 | return 0; |
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| 114 | |
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| 115 | if ( buf == NULL ) |
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| 116 | return -1; |
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| 117 | |
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| 118 | if ( roar_buffer_new_data(&nbuf, count, &data) == -1 ) |
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| 119 | return -1; |
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| 120 | |
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| 121 | memcpy(data, buf, count); |
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| 122 | |
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| 123 | if ( self->in == NULL ) { |
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| 124 | self->in = nbuf; |
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| 125 | } else { |
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| 126 | if ( roar_buffer_add(self->in, nbuf) == -1 ) { |
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| 127 | roar_buffer_free(nbuf); |
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| 128 | return -1; |
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| 129 | } |
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| 130 | } |
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| 131 | |
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| 132 | return count; |
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| 133 | } |
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| 134 | |
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| 135 | off_t roar_vio_buffer_store_lseek (struct roar_vio_calls * vio, off_t offset, int whence) { |
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| 136 | // TODO: implement support to seek forward as wide as the buffer allows us to seek. |
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| 137 | return (off_t)-1; |
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| 138 | } |
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| 139 | |
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| 140 | int roar_vio_buffer_store_nonblock(struct roar_vio_calls * vio, int state) { |
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| 141 | return 0; // if we are in nonblock or not is the same for us. |
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| 142 | } |
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| 143 | |
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| 144 | int roar_vio_buffer_store_sync (struct roar_vio_calls * vio) { |
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| 145 | return 0; // we are always sync. |
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| 146 | } |
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| 147 | |
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| 148 | int roar_vio_buffer_store_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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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 | ROAR_DBG("roar_vio_buffer_store_ctl(vio=%p, cmd=0x%.8x, data=%p) = ?", vio, cmd, data); |
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| 153 | |
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| 154 | switch (cmd) { |
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| 155 | case ROAR_VIO_CTL_GET_NAME: |
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| 156 | if ( data == NULL ) |
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| 157 | return -1; |
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| 158 | |
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| 159 | *(char**)data = "buffer_store"; |
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| 160 | return 0; |
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| 161 | break; |
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| 162 | } |
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| 163 | |
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| 164 | return -1; |
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| 165 | } |
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| 166 | |
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| 167 | //ll |
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