[462] | 1 | //libartsc.c: |
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| 2 | |
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[707] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * The code (may) include prototypes and comments (and maybe |
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| 6 | * other code fragements) from libarts*. They are mostly copyrighted by: |
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| 7 | * Stefan Westerfeld <stefan@space.twc.de> |
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| 8 | * |
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| 9 | * This file is part of libroararts 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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[3517] | 24 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 25 | * Boston, MA 02110-1301, USA. |
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[707] | 26 | * |
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| 27 | * NOTE for everyone want's to change something and send patches: |
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| 28 | * read README and HACKING! There a addition information on |
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| 29 | * the license of this document you need to read before you send |
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| 30 | * any patches. |
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| 31 | * |
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| 32 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 33 | * or libpulse*: |
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| 34 | * The libs libroaresd, libroararts and libroarpulse link this libroar |
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| 35 | * and are therefore GPL. Because of this it may be illigal to use |
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| 36 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 37 | */ |
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| 38 | |
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[463] | 39 | #include <roaraudio.h> |
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| 40 | #include <kde/artsc/artsc.h> |
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| 41 | |
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| 42 | struct roar_connection _libroarartsc_connection[1]; |
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| 43 | |
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| 44 | struct _libroarartsc_stream { |
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| 45 | struct roar_stream stream; |
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| 46 | int fh; |
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| 47 | int blocking; |
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[466] | 48 | int block_size; |
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| 49 | int dir; |
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[463] | 50 | }; |
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| 51 | |
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| 52 | int arts_init(void) { |
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| 53 | return roar_simple_connect(_libroarartsc_connection, NULL, "libroarartsc client"); |
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| 54 | } |
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| 55 | |
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| 56 | void arts_free(void) { |
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| 57 | roar_disconnect(_libroarartsc_connection); |
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| 58 | } |
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| 59 | |
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| 60 | /** |
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| 61 | * asks aRtsd to free the DSP device and return 1 if it was successful, |
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| 62 | * 0 if there were active non-suspendable modules |
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| 63 | */ |
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| 64 | int arts_suspend(void) { |
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| 65 | return roar_set_standby(_libroarartsc_connection, ROAR_STANDBY_ACTIVE) == 0 ? 1 : 0; |
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| 66 | } |
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| 67 | |
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| 68 | /** |
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| 69 | * asks aRtsd if the DSP device is free and return 1 if it is, |
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| 70 | * 0 if not |
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| 71 | */ |
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| 72 | int arts_suspended(void) { |
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| 73 | return roar_get_standby(_libroarartsc_connection) == ROAR_STANDBY_ACTIVE; |
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| 74 | } |
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| 75 | |
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| 76 | |
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| 77 | /** |
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| 78 | * converts an error code to a human readable error message |
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| 79 | * |
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| 80 | * @param errorcode the errorcode (from another arts function that failed) |
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| 81 | * @returns a text string with the error message |
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| 82 | */ |
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| 83 | const char *arts_error_text(int errorcode) { |
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| 84 | return strerror(errorcode); |
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| 85 | } |
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| 86 | |
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| 87 | /** |
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| 88 | * open a stream for playing |
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| 89 | * |
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| 90 | * @param rate the sampling rate (something like 44100) |
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| 91 | * @param bits how many bits each sample has (8 or 16) |
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| 92 | * @param channels how many channels, 1 is mono, 2 is stereo |
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| 93 | * @param name the name of the stream (these will be used so that the user can |
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| 94 | * assign streams to effects/mixer channels and similar) |
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| 95 | * |
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| 96 | * @return a stream |
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| 97 | */ |
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| 98 | arts_stream_t arts_play_stream(int rate, int bits, int channels, const char *name) { |
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| 99 | struct _libroarartsc_stream * s = malloc(sizeof(struct _libroarartsc_stream)); |
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| 100 | struct roar_meta meta; |
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[466] | 101 | struct roar_stream_info info; |
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[463] | 102 | |
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| 103 | if ( !s ) |
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| 104 | return NULL; |
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| 105 | |
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| 106 | if ( (s->fh = roar_simple_new_stream_obj(_libroarartsc_connection, &(s->stream), |
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| 107 | rate, channels, bits, ROAR_CODEC_DEFAULT, ROAR_DIR_PLAY)) == -1 ) { |
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| 108 | free(s); |
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| 109 | return NULL; |
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| 110 | } |
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| 111 | |
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[466] | 112 | s->dir = ROAR_DIR_PLAY; |
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| 113 | |
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[463] | 114 | s->blocking = 1; |
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| 115 | |
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[466] | 116 | if ( roar_stream_get_info(_libroarartsc_connection, &(s->stream), &info) != -1 ) { |
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| 117 | s->block_size = info.block_size; |
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| 118 | } else { |
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| 119 | close(s->fh); |
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| 120 | free(s); |
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| 121 | return NULL; |
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| 122 | } |
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| 123 | |
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[463] | 124 | if ( name && *name ) { |
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| 125 | meta.value = (char*)name; |
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| 126 | meta.key[0] = 0; |
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| 127 | meta.type = ROAR_META_TYPE_DESCRIPTION; |
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| 128 | |
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| 129 | roar_stream_meta_set(_libroarartsc_connection, &(s->stream), ROAR_META_MODE_SET, &meta); |
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| 130 | } |
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| 131 | |
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| 132 | return (arts_stream_t) s; |
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| 133 | } |
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| 134 | |
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| 135 | /** |
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| 136 | * open a stream for recording |
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| 137 | * |
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| 138 | * @param rate the sampling rate (something like 44100) |
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| 139 | * @param bits how many bits each sample has (8 or 16) |
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| 140 | * @param channels how many channels, 1 is mono, 2 is stereo |
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| 141 | * @param name the name of the stream (these will be used so that the user can |
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| 142 | * assign streams to effects/mixer channels and similar) |
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| 143 | * |
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| 144 | * @return a stream |
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| 145 | */ |
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| 146 | arts_stream_t arts_record_stream(int rate, int bits, int channels, const char *name) { |
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| 147 | struct _libroarartsc_stream * s = malloc(sizeof(struct _libroarartsc_stream)); |
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| 148 | struct roar_meta meta; |
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[466] | 149 | struct roar_stream_info info; |
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[463] | 150 | |
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| 151 | if ( !s ) |
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| 152 | return NULL; |
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| 153 | |
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| 154 | if ( (s->fh = roar_simple_new_stream_obj(_libroarartsc_connection, &(s->stream), |
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| 155 | rate, channels, bits, ROAR_CODEC_DEFAULT, ROAR_DIR_RECORD)) == -1 ) { |
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| 156 | free(s); |
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| 157 | return NULL; |
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| 158 | } |
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| 159 | |
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[466] | 160 | s->dir = ROAR_DIR_RECORD; |
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| 161 | |
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[463] | 162 | s->blocking = 1; |
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| 163 | |
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[466] | 164 | if ( roar_stream_get_info(_libroarartsc_connection, &(s->stream), &info) != -1 ) { |
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| 165 | s->block_size = info.block_size; |
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| 166 | } else { |
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| 167 | close(s->fh); |
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| 168 | free(s); |
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| 169 | return NULL; |
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| 170 | } |
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| 171 | |
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[463] | 172 | if ( name && *name ) { |
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| 173 | meta.value = (char*)name; |
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| 174 | meta.key[0] = 0; |
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| 175 | meta.type = ROAR_META_TYPE_DESCRIPTION; |
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| 176 | |
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| 177 | roar_stream_meta_set(_libroarartsc_connection, &(s->stream), ROAR_META_MODE_SET, &meta); |
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| 178 | } |
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| 179 | |
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| 180 | return (arts_stream_t) s; |
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| 181 | } |
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| 182 | |
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| 183 | /** |
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| 184 | * close a stream |
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| 185 | */ |
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| 186 | void arts_close_stream(arts_stream_t stream) { |
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| 187 | struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream; |
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| 188 | if ( !stream ) |
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| 189 | return; |
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| 190 | |
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| 191 | close(s->fh); |
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| 192 | |
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| 193 | free(stream); |
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| 194 | } |
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| 195 | |
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| 196 | /** |
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| 197 | * read samples from stream |
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| 198 | * |
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| 199 | * @param stream a previously opened record stream |
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| 200 | * @param buffer a buffer with sample data |
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| 201 | * @param count the number of bytes contained in the buffer |
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| 202 | * |
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| 203 | * @returns number of read bytes on success or error code |
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| 204 | */ |
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| 205 | int arts_read(arts_stream_t stream, void *buffer, int count) { |
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| 206 | struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream; |
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| 207 | if ( !stream ) |
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| 208 | return -1; |
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| 209 | |
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| 210 | return read(s->fh, buffer, count); |
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| 211 | } |
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| 212 | |
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| 213 | /** |
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| 214 | * write samples to to stream |
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| 215 | * |
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| 216 | * @param stream a previously opened play stream |
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| 217 | * @param buffer a buffer with sample data |
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| 218 | * @param count the number of bytes contained in the buffer |
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| 219 | * |
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| 220 | * @returns number of written bytes on success or error code |
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| 221 | */ |
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| 222 | int arts_write(arts_stream_t stream, const void *buffer, int count) { |
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| 223 | struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream; |
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| 224 | if ( !stream ) |
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| 225 | return -1; |
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| 226 | |
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| 227 | return write(s->fh, buffer, count); |
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| 228 | } |
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| 229 | |
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| 230 | /** |
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| 231 | * configure a parameter of a stream |
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| 232 | * |
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| 233 | * @param stream an opened record or play stream |
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| 234 | * @param parameter the parameter you want to modify |
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| 235 | * @param value the new value |
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| 236 | * |
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| 237 | * @returns the new value of the parameter (which may or may not be the value |
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| 238 | * you wanted to have), or an error code if something went wrong |
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| 239 | */ |
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| 240 | int arts_stream_set(arts_stream_t stream, arts_parameter_t param, int value) { |
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| 241 | struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream; |
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| 242 | if ( !stream ) |
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| 243 | return -1; |
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| 244 | |
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| 245 | if ( param == ARTS_P_BLOCKING ) { |
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| 246 | if ( roar_socket_nonblock(s->fh, value ? ROAR_SOCKET_BLOCK : ROAR_SOCKET_NONBLOCK) == -1 ) |
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| 247 | return -1; |
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| 248 | return arts_stream_get(stream, param); |
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| 249 | } |
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| 250 | |
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[466] | 251 | return arts_stream_get(stream, param); |
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[463] | 252 | } |
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| 253 | |
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| 254 | /** |
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| 255 | * query a parameter of a stream |
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| 256 | * |
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| 257 | * @param stream an opened record or play stream |
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| 258 | * @param parameter the parameter you want to query |
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| 259 | * |
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| 260 | * @returns the value of the parameter, or an error code |
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| 261 | */ |
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| 262 | int arts_stream_get(arts_stream_t stream, arts_parameter_t param) { |
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| 263 | struct _libroarartsc_stream * s = (struct _libroarartsc_stream *) stream; |
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[466] | 264 | fd_set sl; |
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| 265 | struct timeval tv; |
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[465] | 266 | |
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[463] | 267 | if ( !stream ) |
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| 268 | return -1; |
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| 269 | |
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| 270 | if ( param == ARTS_P_PACKET_SIZE ) { |
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[466] | 271 | return s->block_size; |
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| 272 | } else if ( param == ARTS_P_BUFFER_SPACE ) { |
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| 273 | FD_ZERO(&sl); |
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| 274 | FD_SET(s->fh, &sl); |
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| 275 | |
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| 276 | tv.tv_sec = 0; |
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| 277 | tv.tv_usec = 1; |
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| 278 | |
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| 279 | if ( s->dir == ROAR_DIR_PLAY ) { |
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| 280 | if (select(s->fh + 1, NULL, &sl, NULL, &tv) > 0) |
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| 281 | return s->block_size; |
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| 282 | } else { |
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| 283 | if (select(s->fh + 1, &sl, NULL, NULL, &tv) > 0) |
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| 284 | return s->block_size; |
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[465] | 285 | } |
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[466] | 286 | |
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| 287 | return 0; |
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| 288 | } else if ( param == ARTS_P_BUFFER_SIZE ) { |
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| 289 | return s->block_size*2; |
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[463] | 290 | } else if ( param == ARTS_P_PACKET_COUNT ) { |
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| 291 | return 1; |
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| 292 | } else if ( param == ARTS_P_BLOCKING ) { |
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| 293 | return s->blocking; |
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| 294 | } |
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| 295 | |
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| 296 | return -1; |
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| 297 | } |
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| 298 | |
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[462] | 299 | //ll |
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