[3705] | 1 | //libroarrsound.c: |
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[3703] | 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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| 5 | * The code (may) include prototypes and comments (and maybe |
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| 6 | * other code fragements) from RSound. |
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| 7 | * They are copyrighted by Hans-Kristian 'maister' Arntzen. |
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| 8 | * |
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| 9 | * This file is part of libroarrsound a part of RoarAudio, |
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| 10 | * a cross-platform sound system for both, home and professional use. |
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| 11 | * See README for details. |
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| 12 | * |
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| 13 | * This file is free software; you can redistribute it and/or modify |
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| 14 | * it under the terms of the GNU General Public License version 3 |
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| 15 | * as published by the Free Software Foundation. |
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| 16 | * |
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| 17 | * RoarAudio is distributed in the hope that it will be useful, |
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| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 20 | * GNU General Public License for more details. |
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| 21 | * |
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| 22 | * You should have received a copy of the GNU General Public License |
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| 23 | * along with this software; see the file COPYING. If not, write to |
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| 24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 25 | * |
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| 26 | * NOTE for everyone want's to change something and send patches: |
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| 27 | * read README and HACKING! There a addition information on |
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| 28 | * the license of this document you need to read before you send |
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| 29 | * any patches. |
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| 30 | */ |
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| 31 | |
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| 32 | #include "libroarrsound.h" |
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| 33 | |
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[3744] | 34 | static size_t libroarrsound_fmt2fs (enum rsd_format format) { |
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[3707] | 35 | switch (format) { |
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| 36 | case RSD_S16_LE: |
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| 37 | case RSD_S16_BE: |
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[3865] | 38 | case RSD_S16_NE: |
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[3707] | 39 | case RSD_U16_LE: |
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| 40 | case RSD_U16_BE: |
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[3865] | 41 | case RSD_U16_NE: |
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[3707] | 42 | return 16; |
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| 43 | break; |
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| 44 | case RSD_U8: |
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| 45 | case RSD_S8: |
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[3865] | 46 | case RSD_ALAW: |
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| 47 | case RSD_MULAW: |
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[3707] | 48 | return 8; |
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| 49 | break; |
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| 50 | default: |
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| 51 | return 0; |
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| 52 | break; |
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| 53 | } |
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| 54 | } |
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| 55 | |
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| 56 | int rsd_init (rsound_t **rd) { |
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| 57 | struct libroarrsound * self; |
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| 58 | |
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[3793] | 59 | ROAR_DBG("rsd_init(rd=%p) = ?", rd); |
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| 60 | |
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[3707] | 61 | if ( rd == NULL ) |
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| 62 | return -1; |
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| 63 | |
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| 64 | self = roar_mm_malloc(sizeof(struct libroarrsound)); |
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| 65 | |
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| 66 | if ( self == NULL ) |
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| 67 | return -1; |
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| 68 | |
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| 69 | memset(self, 0, sizeof(struct libroarrsound)); |
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| 70 | |
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| 71 | *rd = (rsound_t*)self; |
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| 72 | |
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| 73 | self->rsound.conn.socket = -1; |
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| 74 | self->rsound.conn.ctl_socket = -1; |
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| 75 | self->rsound.channels = ROAR_CHANNELS_DEFAULT; |
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| 76 | self->rsound.rate = ROAR_RATE_DEFAULT; |
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| 77 | self->rsound.format = RSD_S16_LE; |
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| 78 | |
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[3916] | 79 | strncpy(self->rsound.identity, "libroarrsound client", sizeof(self->rsound.identity) - 1); |
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| 80 | self->rsound.identity[sizeof(self->rsound.identity)-1] = 0; |
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| 81 | |
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[3707] | 82 | return 0; |
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| 83 | } |
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| 84 | |
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[3941] | 85 | /* This is a simpler function that initializes an rsound struct, sets params as given, |
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| 86 | and starts the stream. Should this function fail, the structure will stay uninitialized. |
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| 87 | Should NULL be passed in either host, port or ident, defaults will be used. */ |
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| 88 | |
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| 89 | int rsd_simple_start (rsound_t **rd, const char* host, const char* port, const char* ident, |
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[3945] | 90 | int rate, int channels, enum rsd_format format) { |
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[3941] | 91 | rsound_t * rsound; |
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| 92 | |
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| 93 | if ( rsd_init(rd) == -1 ) |
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| 94 | return -1; |
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| 95 | |
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| 96 | if ( *rd == NULL ) |
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| 97 | return -1; |
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| 98 | |
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| 99 | rsound = *rd; |
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| 100 | |
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| 101 | if ( host != NULL ) { |
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| 102 | if ( rsd_set_param(rsound, RSD_HOST, (void*)host) == -1 ) { |
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| 103 | rsd_free(rsound); |
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| 104 | return -1; |
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| 105 | } |
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| 106 | } |
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| 107 | |
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| 108 | if ( port != NULL ) { |
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| 109 | if ( rsd_set_param(rsound, RSD_PORT, (void*)port) == -1 ) { |
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| 110 | rsd_free(rsound); |
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| 111 | return -1; |
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| 112 | } |
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| 113 | } |
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| 114 | |
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| 115 | if ( ident != NULL ) { |
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| 116 | if ( rsd_set_param(rsound, RSD_IDENTITY, (void*)ident) == -1 ) { |
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| 117 | rsd_free(rsound); |
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| 118 | return -1; |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | if ( rsd_set_param(rsound, RSD_FORMAT, &format) == -1 ) { |
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| 123 | rsd_free(rsound); |
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| 124 | return -1; |
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| 125 | } |
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| 126 | |
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| 127 | if ( rsd_set_param(rsound, RSD_CHANNELS, &channels) == -1 ) { |
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| 128 | rsd_free(rsound); |
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| 129 | return -1; |
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| 130 | } |
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| 131 | |
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| 132 | if ( rsd_set_param(rsound, RSD_SAMPLERATE, &rate) == -1 ) { |
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| 133 | rsd_free(rsound); |
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| 134 | return -1; |
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| 135 | } |
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| 136 | |
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| 137 | if ( rsd_start(rsound) == -1 ) { |
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| 138 | rsd_free(rsound); |
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| 139 | return -1; |
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| 140 | } |
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| 141 | |
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| 142 | return 0; |
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| 143 | } |
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| 144 | |
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| 145 | |
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[3707] | 146 | /* Frees an rsound_t struct. */ |
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| 147 | int rsd_free (rsound_t *rd) { |
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| 148 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 149 | int ret = 0; |
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| 150 | |
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| 151 | if ( self == NULL ) |
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| 152 | return -1; |
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| 153 | |
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| 154 | if ( self->flags & LIBROARRSOUND_FLAGS_CONNECTED ) |
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| 155 | if ( roar_disconnect(&(self->con)) == -1 ) |
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| 156 | ret = -1; |
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| 157 | |
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| 158 | if ( self->flags & LIBROARRSOUND_FLAGS_STREAMING ) |
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| 159 | if ( roar_vio_close(&(self->vio)) == -1 ) |
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| 160 | ret = -1; |
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| 161 | |
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[3923] | 162 | if ( self->rsound.host != NULL ) |
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| 163 | roar_mm_free(self->rsound.host); |
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| 164 | |
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[3707] | 165 | if ( self->rsound.port != NULL ) |
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| 166 | roar_mm_free(self->rsound.port); |
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| 167 | |
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| 168 | roar_mm_free(self); |
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| 169 | |
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| 170 | return ret; |
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| 171 | } |
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| 172 | |
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[3744] | 173 | int rsd_set_param (rsound_t *rd, enum rsd_settings option, void* param) { |
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[3707] | 174 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 175 | |
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[3727] | 176 | ROAR_DBG("rsd_set_param(rd=%p, option=%i, param=%p) = ?", rd, option, param); |
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| 177 | |
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[3707] | 178 | if ( self == NULL || param == NULL ) |
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| 179 | return -1; |
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| 180 | |
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[3743] | 181 | switch (option) { |
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[3707] | 182 | // connection settings: |
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| 183 | case RSD_HOST: |
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[3735] | 184 | if ( self->rsound.host != NULL ) |
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| 185 | roar_mm_free(self->rsound.host); |
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| 186 | |
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[3707] | 187 | self->rsound.host = roar_mm_strdup(param); |
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| 188 | break; |
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| 189 | case RSD_PORT: |
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[3735] | 190 | if ( self->rsound.port != NULL ) |
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| 191 | roar_mm_free(self->rsound.port); |
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| 192 | |
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[3707] | 193 | self->rsound.port = roar_mm_strdup(param); |
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| 194 | break; |
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[3919] | 195 | #ifdef RSD_IDENTITY |
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[3916] | 196 | case RSD_IDENTITY: |
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| 197 | strncpy(self->rsound.identity, param, sizeof(self->rsound.identity) - 1); |
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| 198 | self->rsound.identity[sizeof(self->rsound.identity)-1] = 0; |
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| 199 | break; |
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[3919] | 200 | #endif |
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[3707] | 201 | // stream settings: |
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| 202 | case RSD_SAMPLERATE: |
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| 203 | self->rsound.rate = *(int*)param; |
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| 204 | break; |
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| 205 | case RSD_CHANNELS: |
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| 206 | self->rsound.channels = *(int*)param; |
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| 207 | break; |
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| 208 | case RSD_FORMAT: |
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| 209 | self->rsound.format = *(int*)param; |
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| 210 | self->rsound.framesize = libroarrsound_fmt2fs(self->rsound.format); |
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[3727] | 211 | break; |
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[3707] | 212 | default: |
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| 213 | /* |
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| 214 | RSD_BUFSIZE, |
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| 215 | RSD_LATENCY, |
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| 216 | */ |
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[3727] | 217 | ROAR_DBG("rsd_set_param(rd=%p, option=%i, param=%p) = -1", rd, option, param); |
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[3707] | 218 | return -1; |
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| 219 | break; |
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| 220 | } |
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| 221 | |
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[3727] | 222 | ROAR_DBG("rsd_set_param(rd=%p, option=%i, param=%p) = 0", rd, option, param); |
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[3707] | 223 | return 0; |
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| 224 | } |
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| 225 | |
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| 226 | static int libroarrsound_connect (struct libroarrsound * self) { |
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[3711] | 227 | char * host; |
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[3707] | 228 | |
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| 229 | if ( self->flags & LIBROARRSOUND_FLAGS_CONNECTED ) |
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| 230 | return 0; |
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| 231 | |
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[3711] | 232 | host = self->rsound.host; |
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| 233 | |
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| 234 | if ( host == NULL ) |
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| 235 | host = getenv("RSD_SERVER"); |
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[3707] | 236 | |
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| 237 | // FIXME: we currently ignore the port. :( |
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| 238 | |
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[3793] | 239 | ROAR_DBG("libroarrsound_connect(self=%p): try to connect to: %s", self, host); |
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| 240 | |
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[3916] | 241 | if ( roar_simple_connect(&(self->con), host, self->rsound.identity) == -1 ) { |
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[3793] | 242 | ROAR_DBG("libroarrsound_connect(self=%p) = -1 // can not connect to server", self); |
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[3707] | 243 | return -1; |
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[3793] | 244 | } |
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[3707] | 245 | |
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| 246 | self->flags |= LIBROARRSOUND_FLAGS_CONNECTED; |
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| 247 | |
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[3793] | 248 | ROAR_DBG("libroarrsound_connect(self=%p) = 0", self); |
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[3707] | 249 | return 0; |
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| 250 | } |
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| 251 | |
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| 252 | /* Establishes connection to server. Might fail if connection can't be established or that one of |
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| 253 | the mandatory options isn't set in rsd_set_param(). This needs to be called after params have been set |
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| 254 | with rsd_set_param(), and before rsd_write(). */ |
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| 255 | int rsd_start (rsound_t *rd) { |
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| 256 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 257 | int bits = 16; |
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| 258 | int codec; |
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| 259 | |
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[3793] | 260 | ROAR_DBG("rsd_start(rd=%p) = ?", rd); |
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| 261 | |
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[3707] | 262 | if ( self == NULL ) |
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| 263 | return -1; |
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| 264 | |
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| 265 | if ( self->flags & LIBROARRSOUND_FLAGS_STREAMING ) |
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| 266 | return 0; |
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| 267 | |
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[3793] | 268 | ROAR_DBG("rsd_start(rd=%p) = ?", rd); |
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| 269 | |
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[3707] | 270 | if ( !(self->flags & LIBROARRSOUND_FLAGS_CONNECTED) ) { |
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| 271 | if ( libroarrsound_connect(self) == -1 ) |
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| 272 | return -1; |
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| 273 | } |
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| 274 | |
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[3793] | 275 | ROAR_DBG("rsd_start(rd=%p) = ?", rd); |
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| 276 | |
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[3707] | 277 | switch (self->rsound.format) { |
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| 278 | case RSD_S16_LE: |
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| 279 | codec = ROAR_CODEC_PCM_S_LE; |
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| 280 | break; |
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| 281 | case RSD_S16_BE: |
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| 282 | codec = ROAR_CODEC_PCM_S_BE; |
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| 283 | break; |
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[3865] | 284 | case RSD_S16_NE: |
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| 285 | codec = ROAR_CODEC_PCM_S; |
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| 286 | break; |
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[3707] | 287 | case RSD_U16_LE: |
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| 288 | codec = ROAR_CODEC_PCM_U_LE; |
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| 289 | break; |
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| 290 | case RSD_U16_BE: |
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| 291 | codec = ROAR_CODEC_PCM_U_BE; |
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| 292 | break; |
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[3865] | 293 | case RSD_U16_NE: |
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| 294 | codec = ROAR_CODEC_PCM_U; |
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| 295 | break; |
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[3707] | 296 | case RSD_S8: |
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| 297 | codec = ROAR_CODEC_PCM_S; |
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| 298 | bits = 8; |
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| 299 | break; |
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| 300 | case RSD_U8: |
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| 301 | codec = ROAR_CODEC_PCM_U; |
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| 302 | bits = 8; |
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| 303 | break; |
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[3865] | 304 | case RSD_ALAW: |
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| 305 | codec = ROAR_CODEC_ALAW; |
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| 306 | bits = 8; |
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| 307 | break; |
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| 308 | case RSD_MULAW: |
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| 309 | codec = ROAR_CODEC_MULAW; |
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| 310 | bits = 8; |
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| 311 | break; |
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[3707] | 312 | default: |
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| 313 | return -1; |
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| 314 | break; |
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| 315 | } |
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| 316 | |
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[3793] | 317 | ROAR_DBG("rsd_start(rd=%p) = ?", rd); |
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| 318 | |
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[3707] | 319 | if ( roar_vio_simple_new_stream_obj(&(self->vio), &(self->con), &(self->stream), |
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| 320 | self->rsound.rate, self->rsound.channels, bits, codec, ROAR_DIR_PLAY) == -1 ) |
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| 321 | return -1; |
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| 322 | |
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[3793] | 323 | ROAR_DBG("rsd_start(rd=%p) = ?", rd); |
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| 324 | |
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[3707] | 325 | self->flags |= LIBROARRSOUND_FLAGS_STREAMING; |
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| 326 | |
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[3793] | 327 | ROAR_DBG("rsd_start(rd=%p) = 0", rd); |
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| 328 | |
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[3707] | 329 | return 0; |
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| 330 | } |
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| 331 | |
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[3922] | 332 | /* Shuts down the rsound data structures, but returns the file descriptor associated with the connection. |
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| 333 | The control socket will be shut down. If this function returns a negative number, the exec failed, |
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| 334 | but the data structures will not be teared down. |
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| 335 | Should a valid file descriptor be returned, it will always be non-blocking. <<-- FIXME? */ |
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| 336 | int rsd_exec (rsound_t *rd) { |
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| 337 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 338 | int fh; |
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| 339 | |
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[3924] | 340 | ROAR_DBG("rsd_exec(rd=%p) = ?", rd); |
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| 341 | |
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[3922] | 342 | if ( !(self->flags & LIBROARRSOUND_FLAGS_STREAMING) ) |
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| 343 | if ( rsd_start(rd) == -1 ) |
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| 344 | return -1; |
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| 345 | |
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[3924] | 346 | ROAR_DBG("rsd_exec(rd=%p) = ?", rd); |
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| 347 | |
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[3922] | 348 | if ( roar_vio_ctl(&(self->vio), ROAR_VIO_CTL_GET_FH, &fh) == -1 ) |
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| 349 | return -1; |
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| 350 | |
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[3924] | 351 | ROAR_DBG("rsd_exec(rd=%p) = ?", rd); |
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| 352 | |
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[3922] | 353 | if ( fh == -1 ) |
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| 354 | return -1; |
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| 355 | |
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[3924] | 356 | ROAR_DBG("rsd_exec(rd=%p) = ?", rd); |
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| 357 | |
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[3922] | 358 | if ( roar_stream_exec(&(self->con), &(self->stream)) == -1 ) |
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| 359 | return -1; |
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| 360 | |
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[3924] | 361 | ROAR_DBG("rsd_exec(rd=%p) = ?", rd); |
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| 362 | |
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[3922] | 363 | // reset flags: |
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| 364 | if ( self->flags & LIBROARRSOUND_FLAGS_CONNECTED ) |
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| 365 | self->flags -= LIBROARRSOUND_FLAGS_CONNECTED; |
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| 366 | |
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| 367 | if ( self->flags & LIBROARRSOUND_FLAGS_STREAMING ) |
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| 368 | self->flags -= LIBROARRSOUND_FLAGS_STREAMING; |
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| 369 | |
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[3924] | 370 | ROAR_DBG("rsd_exec(rd=%p) = ?", rd); |
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| 371 | |
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[3922] | 372 | // we hope nothing goes wrong here: |
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| 373 | rsd_free(rd); |
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| 374 | |
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[3933] | 375 | ROAR_DBG("rsd_exec(rd=%p) = %i", rd, fh); |
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[3924] | 376 | |
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[3922] | 377 | return fh; |
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| 378 | } |
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| 379 | |
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[3707] | 380 | /* Disconnects from server. All audio data still in network buffer and other buffers will be dropped. |
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| 381 | To continue playing, you will need to rsd_start() again. */ |
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| 382 | int rsd_stop (rsound_t *rd) { |
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| 383 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 384 | int ret; |
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| 385 | |
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| 386 | if ( self == NULL ) |
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| 387 | return -1; |
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| 388 | |
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| 389 | if ( !(self->flags & LIBROARRSOUND_FLAGS_STREAMING) ) |
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| 390 | return 0; |
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| 391 | |
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| 392 | ret = roar_vio_close(&(self->vio)); |
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| 393 | |
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| 394 | self->flags -= LIBROARRSOUND_FLAGS_STREAMING; |
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| 395 | |
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| 396 | return ret; |
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| 397 | } |
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| 398 | |
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| 399 | /* Writes from buf to the internal buffer. Might fail if no connection is established, |
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| 400 | or there was an unexpected error. This function will block until all data has |
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| 401 | been written to the buffer. This function will return the number of bytes written to the buffer, |
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| 402 | or 0 should it fail (disconnection from server). You will have to restart the stream again should this occur. */ |
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[3865] | 403 | size_t rsd_write (rsound_t *rd, const void * buf, size_t size) { |
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[3707] | 404 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 405 | ssize_t ret; |
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| 406 | |
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| 407 | if ( self == NULL ) |
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| 408 | return -1; |
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| 409 | |
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| 410 | if ( !(self->flags & LIBROARRSOUND_FLAGS_STREAMING) ) |
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| 411 | return 0; |
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| 412 | |
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| 413 | ret = roar_vio_write(&(self->vio), (void*)buf, size); |
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| 414 | |
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| 415 | if ( ret == -1 ) |
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| 416 | return 0; |
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| 417 | |
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| 418 | return ret; |
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| 419 | } |
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| 420 | |
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| 421 | /* Gets the position of the buffer pointer. |
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| 422 | Not really interesting for normal applications. |
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| 423 | Might be useful for implementing rsound on top of other blocking APIs. */ |
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| 424 | size_t rsd_pointer (rsound_t *rd); |
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| 425 | |
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| 426 | /* Aquires how much data can be written to the buffer without blocking */ |
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| 427 | size_t rsd_get_avail (rsound_t *rd); |
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| 428 | |
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| 429 | /* Aquires the latency at the moment for the audio stream. It is measured in bytes. Useful for syncing video and audio. */ |
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[3708] | 430 | size_t rsd_delay (rsound_t *rd) { |
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| 431 | (void)rd; |
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| 432 | return 0; // TODO: FIXME: write some code to read pos from server. |
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| 433 | } |
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| 434 | |
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[3889] | 435 | /* Utility for returning latency in milliseconds. */ |
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| 436 | size_t rsd_delay_ms (rsound_t *rd) { |
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| 437 | if ( rd == NULL ) |
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| 438 | return -1; |
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| 439 | |
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| 440 | if ( rd->rate <= 0 || rd->channels <= 0 ) |
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| 441 | return -1; |
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| 442 | |
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| 443 | return (rsd_delay(rd) * 1000) / (rd->rate * rd->channels * rd->framesize); |
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| 444 | } |
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| 445 | |
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| 446 | /* Returns bytes per sample */ |
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| 447 | int rsd_samplesize( rsound_t *rd ) { |
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| 448 | if ( rd == NULL ) |
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| 449 | return -1; |
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| 450 | |
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| 451 | return rd->framesize; |
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| 452 | } |
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| 453 | |
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[3707] | 454 | /* Will sleep until latency of stream reaches maximum allowed latency defined earlier by rsd_set_param - RSD_LATENCY |
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| 455 | Useful for hard headed blocking I/O design where user defined latency is needed. If rsd_set_param hasn't been set |
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| 456 | with RSD_LATENCY, this function will do nothing. */ |
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| 457 | void rsd_delay_wait(rsound_t *rd); |
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| 458 | |
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| 459 | |
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| 460 | /* Pauses or unpauses a stream. pause -> enable = 1 |
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| 461 | This function essentially calls on start() and stop(). This behavior might be changed later. */ |
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[3710] | 462 | int rsd_pause (rsound_t *rd, int enable) { |
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| 463 | struct libroarrsound * self = (struct libroarrsound *)rd; |
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| 464 | |
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| 465 | if ( self == NULL ) |
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| 466 | return -1; |
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| 467 | |
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| 468 | if ( !(self->flags & LIBROARRSOUND_FLAGS_STREAMING) ) |
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| 469 | return -1; |
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| 470 | |
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| 471 | return roar_stream_set_flags(&(self->con), &(self->stream), ROAR_FLAG_PAUSE, enable ? ROAR_SET_FLAG : ROAR_RESET_FLAG); |
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| 472 | } |
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[3707] | 473 | |
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[3703] | 474 | //ll |
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