[3134] | 1 | //pcm.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 "roar.h" |
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| 36 | |
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| 37 | static int roar_hw_constraint(struct roar_alsa_pcm * self) { |
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| 38 | snd_pcm_ioplug_t *io = &(self->io); |
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| 39 | static const snd_pcm_access_t access_list[] = { |
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| 40 | SND_PCM_ACCESS_RW_INTERLEAVED |
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| 41 | }; |
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| 42 | static const unsigned int formats[] = { |
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| 43 | // TODO: add list of additioal formats we support |
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| 44 | SND_PCM_FORMAT_U8, |
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| 45 | SND_PCM_FORMAT_A_LAW, |
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| 46 | SND_PCM_FORMAT_MU_LAW, |
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| 47 | SND_PCM_FORMAT_S16_LE, |
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| 48 | SND_PCM_FORMAT_S16_BE, |
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| 49 | }; |
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| 50 | int ret; |
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| 51 | |
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[3135] | 52 | ROAR_DBG("roar_hw_constraint(*) = ?"); |
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| 53 | |
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[3134] | 54 | if ( (ret = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_ACCESS, |
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| 55 | _as(access_list), access_list)) < 0 ) |
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| 56 | return ret; |
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| 57 | |
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| 58 | if ( (ret = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_FORMAT, |
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| 59 | _as(formats), formats)) < 0 ) |
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| 60 | return ret; |
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| 61 | |
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| 62 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_CHANNELS, |
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| 63 | 1, ROAR_MAX_CHANNELS)) < 0 ) |
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| 64 | return ret; |
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| 65 | |
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| 66 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_RATE, 8000, 48000)) < 0 ) |
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| 67 | return ret; |
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| 68 | |
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| 69 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIOD_BYTES, 1, 4294967295U)) < 0 ) |
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| 70 | return ret; |
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| 71 | |
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| 72 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIODS, 1, 4294967295U)) < 0 ) |
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| 73 | return ret; |
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| 74 | |
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| 75 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_BUFFER_BYTES, 1, 4294967295U)) < 0 ) |
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| 76 | return ret; |
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| 77 | |
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[3135] | 78 | ROAR_DBG("roar_hw_constraint(*) = 0"); |
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| 79 | |
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[3134] | 80 | return 0; |
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| 81 | } |
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| 82 | |
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| 83 | static int roar_pcm_dummy (snd_pcm_ioplug_t * io) { |
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[3135] | 84 | ROAR_DBG("roar_pcm_dummy(*) = ?"); |
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[3134] | 85 | return 0; |
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| 86 | } |
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| 87 | |
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| 88 | static snd_pcm_sframes_t roar_pcm_pointer(snd_pcm_ioplug_t *io) { |
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[3135] | 89 | ROAR_DBG("roar_pcm_pointer(*) = ?"); |
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[3134] | 90 | return 0; |
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| 91 | } |
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| 92 | |
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| 93 | // TODO: FIXME: add support for reading data! |
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| 94 | static snd_pcm_sframes_t roar_pcm_transfer(snd_pcm_ioplug_t *io, |
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| 95 | const snd_pcm_channel_area_t *areas, |
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| 96 | snd_pcm_uframes_t offset, |
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| 97 | snd_pcm_uframes_t size) { |
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| 98 | struct roar_alsa_pcm * self = io->private_data; |
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| 99 | char * buf; |
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| 100 | |
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[3135] | 101 | ROAR_DBG("roar_pcm_transfer(*) = ?"); |
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| 102 | |
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[3134] | 103 | buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8; |
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| 104 | |
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| 105 | roar_vio_write(&(self->stream_vio), buf, size * self->info.channels * self->info.bits / 8); |
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| 106 | |
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| 107 | return size; |
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| 108 | } |
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| 109 | |
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| 110 | static int roar_pcm_delay(snd_pcm_ioplug_t *io, snd_pcm_sframes_t *delayp) { |
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[3135] | 111 | ROAR_DBG("roar_pcm_delay(*) = ?"); |
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[3134] | 112 | return 0; |
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| 113 | } |
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| 114 | |
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| 115 | static int roar_pcm_prepare(snd_pcm_ioplug_t *io) { |
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| 116 | struct roar_alsa_pcm * self = io->private_data; |
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| 117 | |
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[3135] | 118 | ROAR_DBG("roar_pcm_prepare(*) = ?"); |
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| 119 | |
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[3134] | 120 | if ( self->stream_opened ) { |
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| 121 | roar_vio_close(&(self->stream_vio)); |
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| 122 | self->stream_opened = 0; |
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| 123 | } |
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| 124 | |
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| 125 | if ( roar_stream_new(&(self->stream), self->info.rate, self->info.channels, self->info.bits, self->info.codec) == -1 ) { |
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| 126 | return -EINVAL; |
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| 127 | } |
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| 128 | |
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| 129 | if ( roar_stream_connect(&(self->roar.con), &(self->stream), io->stream == SND_PCM_STREAM_PLAYBACK ? ROAR_DIR_PLAY : ROAR_DIR_MONITOR) == -1 ) { |
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| 130 | return -EINVAL; |
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| 131 | } |
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| 132 | |
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| 133 | self->stream_opened = 1; |
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| 134 | |
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| 135 | return -ENOSYS; |
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| 136 | } |
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| 137 | |
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| 138 | static int roar_pcm_hw_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params) { |
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| 139 | struct roar_alsa_pcm * self = io->private_data; |
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| 140 | |
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[3135] | 141 | ROAR_DBG("roar_pcm_hw_params(*) = ?"); |
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| 142 | |
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[3134] | 143 | self->info.channels = io->channels; |
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| 144 | self->info.rate = io->rate; |
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| 145 | |
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| 146 | switch (io->format) { |
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| 147 | case SND_PCM_FORMAT_U8: |
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| 148 | self->info.codec = ROAR_CODEC_PCM_U_LE; |
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| 149 | self->info.bits = 8; |
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| 150 | break; |
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| 151 | case SND_PCM_FORMAT_A_LAW: |
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| 152 | self->info.codec = ROAR_CODEC_ALAW; |
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| 153 | self->info.bits = 8; |
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| 154 | break; |
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| 155 | case SND_PCM_FORMAT_MU_LAW: |
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| 156 | self->info.codec = ROAR_CODEC_MULAW; |
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| 157 | self->info.bits = 8; |
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| 158 | break; |
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| 159 | case SND_PCM_FORMAT_S16_LE: |
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| 160 | self->info.codec = ROAR_CODEC_PCM_S_LE; |
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| 161 | self->info.bits = 16; |
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| 162 | break; |
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| 163 | case SND_PCM_FORMAT_S16_BE: |
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| 164 | self->info.codec = ROAR_CODEC_PCM_S_BE; |
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| 165 | self->info.bits = 16; |
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| 166 | break; |
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| 167 | default: |
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| 168 | return-EINVAL; |
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| 169 | } |
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| 170 | |
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| 171 | return 0; |
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| 172 | } |
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| 173 | |
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| 174 | static int roar_pcm_close (snd_pcm_ioplug_t * io) { |
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| 175 | struct roar_alsa_pcm * self = io->private_data; |
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| 176 | |
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[3135] | 177 | ROAR_DBG("roar_pcm_close(*) = ?"); |
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| 178 | |
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[3134] | 179 | roar_disconnect(&(self->roar.con)); |
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| 180 | |
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| 181 | free(self); |
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| 182 | |
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| 183 | return 0; |
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| 184 | } |
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| 185 | |
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| 186 | static snd_pcm_ioplug_callback_t roar_pcm_callback = { |
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| 187 | .start = roar_pcm_dummy, |
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| 188 | .stop = roar_pcm_dummy, |
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| 189 | .drain = roar_pcm_dummy, |
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| 190 | .pointer = roar_pcm_pointer, |
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| 191 | .transfer = roar_pcm_transfer, |
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| 192 | .delay = roar_pcm_delay, |
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| 193 | .poll_descriptors_count = NULL, |
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| 194 | .poll_descriptors = NULL, |
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| 195 | .poll_revents = NULL, |
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| 196 | .prepare = roar_pcm_prepare, |
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| 197 | .hw_params = roar_pcm_hw_params, |
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| 198 | .close = roar_pcm_close, |
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| 199 | }; |
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| 200 | |
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| 201 | SND_PCM_PLUGIN_DEFINE_FUNC(roar) { |
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| 202 | struct roar_alsa_pcm * self; |
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| 203 | snd_config_iterator_t i, next; |
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| 204 | snd_config_t * n; |
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| 205 | const char * para; |
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| 206 | const char * server = NULL; |
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| 207 | int ret; |
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| 208 | |
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[3135] | 209 | ROAR_DBG("SND_PCM_PLUGIN_DEFINE_FUNC(roar) = ?"); |
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[3134] | 210 | |
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| 211 | snd_config_for_each(i, next, conf) { |
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| 212 | n = snd_config_iterator_entry(i); |
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| 213 | if ( snd_config_get_id(n, ¶) < 0 ) |
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| 214 | continue; |
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| 215 | |
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| 216 | if ( !strcmp(para, "type") || !strcmp(para, "comment") ) |
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| 217 | continue; |
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| 218 | |
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| 219 | if ( !strcmp(para, "server") ) { |
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| 220 | if (snd_config_get_string(n, &server) < 0) { |
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| 221 | return -EINVAL; |
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| 222 | } |
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| 223 | } else { |
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| 224 | return -EINVAL; |
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| 225 | } |
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| 226 | } |
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| 227 | |
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| 228 | errno = ENOSYS; |
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| 229 | |
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| 230 | if ( (self = malloc(sizeof(struct roar_alsa_pcm))) == NULL ) |
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| 231 | return -errno; |
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| 232 | |
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| 233 | memset(self, 0, sizeof(struct roar_alsa_pcm)); |
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| 234 | |
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| 235 | errno = ENOSYS; |
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| 236 | if ( roar_simple_connect(&(self->roar.con), (char*)server, "ALSA Plugin") == -1 ) { |
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| 237 | free(self); |
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| 238 | return -errno; |
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| 239 | } |
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| 240 | |
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| 241 | self->io.version = SND_PCM_IOPLUG_VERSION; |
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| 242 | self->io.name = "RoarAudio Plugin"; |
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| 243 | self->io.poll_fd = -1; |
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| 244 | self->io.poll_events = 0; |
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| 245 | self->io.mmap_rw = 0; |
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| 246 | self->io.callback = &roar_pcm_callback; |
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| 247 | self->io.private_data = self; |
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| 248 | |
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| 249 | if ( (ret = snd_pcm_ioplug_create(&(self->io), name, stream, mode)) < 0 ) { |
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| 250 | roar_disconnect(&(self->roar.con)); |
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| 251 | free(self); |
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| 252 | return ret; |
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| 253 | } |
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| 254 | |
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| 255 | if ( (ret = roar_hw_constraint(self)) < 0 ) { |
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| 256 | snd_pcm_ioplug_delete(&(self->io)); |
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| 257 | roar_disconnect(&(self->roar.con)); |
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| 258 | free(self); |
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| 259 | return ret; |
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| 260 | } |
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| 261 | |
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[3135] | 262 | ROAR_DBG("SND_PCM_PLUGIN_DEFINE_FUNC(roar) = 0"); |
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| 263 | |
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[3134] | 264 | return 0; |
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| 265 | } |
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| 266 | |
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| 267 | SND_PCM_PLUGIN_SYMBOL(roar); |
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| 268 | |
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[3135] | 269 | int __snd_pcm_roar_open_dlsym_pcm_001 (void) { |
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| 270 | return 0; |
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| 271 | } |
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| 272 | |
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[3134] | 273 | //ll |
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