| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2013 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software: you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation, either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | /** @file lib/uaudio-pulseaudio.c |
| 19 | * @brief Support for PulseAudio backend */ |
| 20 | #include "common.h" |
| 21 | |
| 22 | #if HAVE_PULSEAUDIO |
| 23 | |
| 24 | #include <pulse/simple.h> |
| 25 | #include <pulse/error.h> |
| 26 | |
| 27 | #include "mem.h" |
| 28 | #include "log.h" |
| 29 | #include "uaudio.h" |
| 30 | #include "configuration.h" |
| 31 | |
| 32 | static const char *const pulseaudio_options[] = { |
| 33 | "application", |
| 34 | NULL |
| 35 | }; |
| 36 | |
| 37 | static pa_simple *pulseaudio_simple_handle; |
| 38 | |
| 39 | /** @brief Open the PulseAudio sound device */ |
| 40 | static void pulseaudio_open() { |
| 41 | pa_sample_spec ss; |
| 42 | int error; |
| 43 | ss.format = -1; |
| 44 | switch(uaudio_bits) { |
| 45 | case 8: |
| 46 | if(!uaudio_signed) |
| 47 | ss.format = PA_SAMPLE_U8; |
| 48 | break; |
| 49 | case 16: |
| 50 | if(uaudio_signed) |
| 51 | ss.format = PA_SAMPLE_S16NE; |
| 52 | break; |
| 53 | case 32: |
| 54 | if(uaudio_signed) |
| 55 | ss.format = PA_SAMPLE_S32NE; |
| 56 | break; |
| 57 | } |
| 58 | if(ss.format == -1) |
| 59 | disorder_fatal(0, "unsupported uaudio format (%d, %d)", |
| 60 | uaudio_bits, uaudio_signed); |
| 61 | ss.channels = uaudio_channels; |
| 62 | ss.rate = uaudio_rate; |
| 63 | pulseaudio_simple_handle = pa_simple_new(NULL, |
| 64 | uaudio_get("application", "DisOrder"), |
| 65 | PA_STREAM_PLAYBACK, |
| 66 | NULL, |
| 67 | "DisOrder", |
| 68 | &ss, |
| 69 | NULL, |
| 70 | NULL, |
| 71 | &error); |
| 72 | if(!pulseaudio_simple_handle) |
| 73 | disorder_fatal(0, "pa_simple_new: %s", pa_strerror(error)); |
| 74 | } |
| 75 | |
| 76 | /** @brief Close the PulseAudio sound device */ |
| 77 | static void pulseaudio_close(void) { |
| 78 | pa_simple_free(pulseaudio_simple_handle); |
| 79 | pulseaudio_simple_handle = NULL; |
| 80 | } |
| 81 | |
| 82 | /** @brief Actually play sound via PulseAudio */ |
| 83 | static size_t pulseaudio_play(void *buffer, size_t samples, |
| 84 | unsigned attribute((unused)) flags) { |
| 85 | int error; |
| 86 | int ret = pa_simple_write(pulseaudio_simple_handle, |
| 87 | buffer, |
| 88 | samples * uaudio_sample_size, |
| 89 | &error); |
| 90 | if(ret < 0) |
| 91 | disorder_fatal(0, "pa_simple_write: %s", pa_strerror(error)); |
| 92 | return samples; |
| 93 | } |
| 94 | |
| 95 | static void pulseaudio_start(uaudio_callback *callback, |
| 96 | void *userdata) { |
| 97 | pulseaudio_open(); |
| 98 | uaudio_thread_start(callback, userdata, pulseaudio_play, |
| 99 | 32 / uaudio_sample_size, |
| 100 | 4096 / uaudio_sample_size, |
| 101 | 0); |
| 102 | } |
| 103 | |
| 104 | static void pulseaudio_stop(void) { |
| 105 | uaudio_thread_stop(); |
| 106 | pulseaudio_close(); |
| 107 | } |
| 108 | |
| 109 | static void pulseaudio_open_mixer(void) { |
| 110 | disorder_error(0, "no pulseaudio mixer support yet"); |
| 111 | } |
| 112 | |
| 113 | static void pulseaudio_close_mixer(void) { |
| 114 | } |
| 115 | |
| 116 | static void pulseaudio_get_volume(int *left, int *right) { |
| 117 | *left = *right = 0; |
| 118 | } |
| 119 | |
| 120 | static void pulseaudio_set_volume(int *left, int *right) { |
| 121 | *left = *right = 0; |
| 122 | } |
| 123 | |
| 124 | static void pulseaudio_configure(void) { |
| 125 | } |
| 126 | |
| 127 | const struct uaudio uaudio_pulseaudio = { |
| 128 | .name = "pulseaudio", |
| 129 | .options = pulseaudio_options, |
| 130 | .start = pulseaudio_start, |
| 131 | .stop = pulseaudio_stop, |
| 132 | .activate = uaudio_thread_activate, |
| 133 | .deactivate = uaudio_thread_deactivate, |
| 134 | .open_mixer = pulseaudio_open_mixer, |
| 135 | .close_mixer = pulseaudio_close_mixer, |
| 136 | .get_volume = pulseaudio_get_volume, |
| 137 | .set_volume = pulseaudio_set_volume, |
| 138 | .configure = pulseaudio_configure, |
| 139 | .flags = UAUDIO_API_CLIENT, |
| 140 | }; |
| 141 | |
| 142 | #endif |
| 143 | |
| 144 | /* |
| 145 | Local Variables: |
| 146 | c-basic-offset:2 |
| 147 | comment-column:40 |
| 148 | fill-column:79 |
| 149 | indent-tabs-mode:nil |
| 150 | End: |
| 151 | */ |