[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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[3736] | 5 | * Copyright (C) Hans-Kristian 'maister' Arntzen - 2010 |
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[3134] | 6 | * |
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| 7 | * This file is part of libroar a part of RoarAudio, |
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| 8 | * a cross-platform sound system for both, home and professional use. |
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| 9 | * See README for details. |
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| 10 | * |
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| 11 | * This file is free software; you can redistribute it and/or modify |
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| 12 | * it under the terms of the GNU General Public License version 3 |
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| 13 | * as published by the Free Software Foundation. |
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| 14 | * |
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| 15 | * libroar is distributed in the hope that it will be useful, |
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 18 | * GNU General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with this software; see the file COPYING. If not, write to |
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[3517] | 22 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 23 | * Boston, MA 02110-1301, USA. |
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[3134] | 24 | * |
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| 25 | * NOTE for everyone want's to change something and send patches: |
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| 26 | * read README and HACKING! There a addition information on |
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| 27 | * the license of this document you need to read before you send |
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| 28 | * any patches. |
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| 29 | * |
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| 30 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 31 | * or libpulse*: |
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| 32 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 33 | * and are therefore GPL. Because of this it may be illigal to use |
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| 34 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 35 | */ |
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| 36 | |
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| 37 | #include "roar.h" |
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| 38 | |
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[3736] | 39 | // Equvivalent to prepare(). Starts a stream. Also needs to reset the writec since pointer() will do funny |
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| 40 | // things without it. Will be called several times during a program! |
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| 41 | static int roar_pcm_start (snd_pcm_ioplug_t * io) { |
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| 42 | struct roar_alsa_pcm * self = io->private_data; |
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[3748] | 43 | int fh; |
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[3736] | 44 | |
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| 45 | ROAR_DBG("roar_pcm_start(*) = ?"); |
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| 46 | |
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| 47 | // If start is called several times in a row, just ignore it. |
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| 48 | if (self->stream_opened) |
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| 49 | return 0; |
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| 50 | |
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[3738] | 51 | if ( roar_vio_simple_new_stream_obj(&(self->stream_vio), &(self->roar.con), &(self->stream), |
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| 52 | self->info.rate, self->info.channels, self->info.bits, self->info.codec, |
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| 53 | io->stream == SND_PCM_STREAM_PLAYBACK ? ROAR_DIR_PLAY : ROAR_DIR_MONITOR |
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| 54 | ) == -1 ) { |
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[3736] | 55 | return -EINVAL; |
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| 56 | } |
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| 57 | |
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[3748] | 58 | if ( roar_vio_ctl(&(self->stream_vio), io->stream == SND_PCM_STREAM_PLAYBACK ? |
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| 59 | ROAR_VIO_CTL_GET_SELECT_WRITE_FH : ROAR_VIO_CTL_GET_SELECT_READ_FH, |
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| 60 | &fh) != -1 ) { |
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| 61 | |
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| 62 | io->poll_fd = fh; |
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| 63 | io->poll_events = io->stream == SND_PCM_STREAM_PLAYBACK ? POLLOUT : POLLIN; |
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| 64 | |
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| 65 | snd_pcm_ioplug_reinit_status(io); |
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| 66 | } |
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| 67 | |
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[3736] | 68 | // Stream is now active, yay. |
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| 69 | self->stream_opened = 1; |
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| 70 | self->writec = 0; |
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| 71 | |
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| 72 | return 0; |
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| 73 | } |
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| 74 | |
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| 75 | // Simply stopping the stream. Will need to be restarted to play more. |
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| 76 | // Will be called several times together with roar_pcm_start() |
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| 77 | static int roar_pcm_stop (snd_pcm_ioplug_t *io) { |
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| 78 | struct roar_alsa_pcm * self = io->private_data; |
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| 79 | |
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| 80 | ROAR_DBG("roar_pcm_stop(*) = ?"); |
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| 81 | |
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| 82 | // If this is called several times in a row, just ignore. |
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| 83 | if ( !self->stream_opened ) |
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| 84 | return 0; |
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| 85 | |
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| 86 | roar_vio_close(&(self->stream_vio)); |
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| 87 | self->stream_opened = 0; |
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| 88 | |
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| 89 | ROAR_DBG("roar_pcm_stop(*) = 0"); |
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| 90 | |
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| 91 | return 0; |
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| 92 | } |
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| 93 | |
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[3134] | 94 | static int roar_hw_constraint(struct roar_alsa_pcm * self) { |
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| 95 | snd_pcm_ioplug_t *io = &(self->io); |
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| 96 | static const snd_pcm_access_t access_list[] = { |
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| 97 | SND_PCM_ACCESS_RW_INTERLEAVED |
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| 98 | }; |
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| 99 | static const unsigned int formats[] = { |
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[3739] | 100 | SND_PCM_FORMAT_S8, |
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[3134] | 101 | SND_PCM_FORMAT_U8, |
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| 102 | SND_PCM_FORMAT_A_LAW, |
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| 103 | SND_PCM_FORMAT_MU_LAW, |
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| 104 | SND_PCM_FORMAT_S16_LE, |
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| 105 | SND_PCM_FORMAT_S16_BE, |
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[3739] | 106 | SND_PCM_FORMAT_U16_LE, |
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| 107 | SND_PCM_FORMAT_U16_BE, |
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| 108 | SND_PCM_FORMAT_S32_LE, |
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| 109 | SND_PCM_FORMAT_S32_BE, |
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| 110 | SND_PCM_FORMAT_U32_LE, |
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| 111 | SND_PCM_FORMAT_U32_BE, |
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| 112 | SND_PCM_FORMAT_S24_3LE, |
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| 113 | SND_PCM_FORMAT_S24_3BE, |
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| 114 | SND_PCM_FORMAT_U24_3LE, |
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| 115 | SND_PCM_FORMAT_U24_3BE, |
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[3134] | 116 | }; |
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| 117 | int ret; |
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| 118 | |
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[3135] | 119 | ROAR_DBG("roar_hw_constraint(*) = ?"); |
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| 120 | |
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[3134] | 121 | if ( (ret = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_ACCESS, |
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| 122 | _as(access_list), access_list)) < 0 ) |
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| 123 | return ret; |
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| 124 | |
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| 125 | if ( (ret = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_FORMAT, |
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| 126 | _as(formats), formats)) < 0 ) |
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| 127 | return ret; |
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| 128 | |
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| 129 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_CHANNELS, |
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| 130 | 1, ROAR_MAX_CHANNELS)) < 0 ) |
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| 131 | return ret; |
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| 132 | |
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[3660] | 133 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_RATE, 8000, 192000)) < 0 ) |
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[3134] | 134 | return ret; |
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| 135 | |
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[3736] | 136 | #if 0 |
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[3134] | 137 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIOD_BYTES, 1, 4294967295U)) < 0 ) |
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| 138 | return ret; |
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| 139 | |
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| 140 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIODS, 1, 4294967295U)) < 0 ) |
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| 141 | return ret; |
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| 142 | |
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| 143 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_BUFFER_BYTES, 1, 4294967295U)) < 0 ) |
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| 144 | return ret; |
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[3736] | 145 | #else |
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| 146 | // We shouldn't let ALSA use extremely low or high values, it will kill a kitty most likely. :v |
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| 147 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIOD_BYTES, 1 << 6, 1 << 18)) < 0 ) |
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| 148 | return ret; |
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| 149 | |
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| 150 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIODS, 1, 1024)) < 0 ) |
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| 151 | return ret; |
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| 152 | |
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| 153 | if ( (ret = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_BUFFER_BYTES, 1 << 13, 1 << 24)) < 0 ) |
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| 154 | return ret; |
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| 155 | #endif |
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[3134] | 156 | |
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[3135] | 157 | ROAR_DBG("roar_hw_constraint(*) = 0"); |
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| 158 | |
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[3134] | 159 | return 0; |
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| 160 | } |
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| 161 | |
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[3736] | 162 | |
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| 163 | /////////////////////////////// |
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| 164 | /// TODO: Needs to be implemented |
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| 165 | /////////////////////////////// |
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| 166 | // This hacky hack should not be used, since apparently, using this, ALSA will think the audio buffer is always empty (?), |
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| 167 | // leading to completely broken blocking audio which will only work with audio players. |
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| 168 | // Will need a method to determine how much buffer data is available to write to the roar buffer without blocking. |
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| 169 | // We therefore also need to know the buffersize that ALSA uses. |
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| 170 | |
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| 171 | // Referring to alsa-lib/src/pcm/pcm_ioplug.c : snd_pcm_ioplug_hw_ptr_update |
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[3134] | 172 | static snd_pcm_sframes_t roar_pcm_pointer(snd_pcm_ioplug_t *io) { |
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[3658] | 173 | struct roar_alsa_pcm * self = io->private_data; |
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| 174 | |
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[3135] | 175 | ROAR_DBG("roar_pcm_pointer(*) = ?"); |
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[3658] | 176 | |
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| 177 | return snd_pcm_bytes_to_frames(io->pcm, self->writec); |
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[3134] | 178 | } |
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| 179 | |
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| 180 | // TODO: FIXME: add support for reading data! |
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| 181 | static snd_pcm_sframes_t roar_pcm_transfer(snd_pcm_ioplug_t *io, |
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| 182 | const snd_pcm_channel_area_t *areas, |
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| 183 | snd_pcm_uframes_t offset, |
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| 184 | snd_pcm_uframes_t size) { |
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| 185 | struct roar_alsa_pcm * self = io->private_data; |
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| 186 | char * buf; |
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[3658] | 187 | size_t len = size * self->info.channels * self->info.bits / 8; |
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| 188 | ssize_t ret; |
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[3134] | 189 | |
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[3135] | 190 | ROAR_DBG("roar_pcm_transfer(*) = ?"); |
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[3658] | 191 | ROAR_DBG("roar_pcm_transfer(*): len=%lu", (long unsigned int) len); |
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[3135] | 192 | |
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[3736] | 193 | // Weird ALSA stuff. |
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[3134] | 194 | buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8; |
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| 195 | |
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[3658] | 196 | ret = roar_vio_write(&(self->stream_vio), buf, len); |
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[3134] | 197 | |
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[3736] | 198 | if ( ret != -1 ) { |
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| 199 | // We increment the written counter so that subsequent calls to pointer() will not cause |
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| 200 | // the library to hang due to several quirks that ALSA uses to determine available size. |
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| 201 | // This approach is bad, but is needed until pointer() is implemented correctly. |
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[3658] | 202 | self->writec += ret; |
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[3736] | 203 | } else { |
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| 204 | return -EIO; |
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| 205 | } |
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[3658] | 206 | |
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| 207 | ROAR_DBG("roar_pcm_transfer(*) = %lli", (long long int)size); |
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[3134] | 208 | return size; |
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| 209 | } |
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| 210 | |
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[3736] | 211 | |
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| 212 | /////////////////////////////// |
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| 213 | /// TODO: Needs to be implemented |
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| 214 | /////////////////////////////// |
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[3134] | 215 | static int roar_pcm_delay(snd_pcm_ioplug_t *io, snd_pcm_sframes_t *delayp) { |
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[3736] | 216 | (void)io; |
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| 217 | |
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[3135] | 218 | ROAR_DBG("roar_pcm_delay(*) = ?"); |
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[3736] | 219 | |
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| 220 | // TODO: We need to set *delayp the latency in frames. |
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| 221 | *delayp = 0; |
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| 222 | |
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[3134] | 223 | return 0; |
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| 224 | } |
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| 225 | |
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| 226 | static int roar_pcm_prepare(snd_pcm_ioplug_t *io) { |
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[3135] | 227 | ROAR_DBG("roar_pcm_prepare(*) = ?"); |
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| 228 | |
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[3736] | 229 | return roar_pcm_start(io); |
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[3134] | 230 | } |
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| 231 | |
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| 232 | static int roar_pcm_hw_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params) { |
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| 233 | struct roar_alsa_pcm * self = io->private_data; |
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| 234 | |
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[3736] | 235 | (void) params; |
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| 236 | |
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[3135] | 237 | ROAR_DBG("roar_pcm_hw_params(*) = ?"); |
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| 238 | |
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[3134] | 239 | self->info.channels = io->channels; |
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| 240 | self->info.rate = io->rate; |
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| 241 | |
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| 242 | switch (io->format) { |
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[3739] | 243 | case SND_PCM_FORMAT_S8: |
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| 244 | self->info.codec = ROAR_CODEC_PCM_U_LE; |
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| 245 | self->info.bits = 8; |
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| 246 | break; |
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[3134] | 247 | case SND_PCM_FORMAT_U8: |
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| 248 | self->info.codec = ROAR_CODEC_PCM_U_LE; |
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| 249 | self->info.bits = 8; |
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| 250 | break; |
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| 251 | case SND_PCM_FORMAT_A_LAW: |
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| 252 | self->info.codec = ROAR_CODEC_ALAW; |
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| 253 | self->info.bits = 8; |
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| 254 | break; |
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| 255 | case SND_PCM_FORMAT_MU_LAW: |
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| 256 | self->info.codec = ROAR_CODEC_MULAW; |
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| 257 | self->info.bits = 8; |
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| 258 | break; |
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| 259 | case SND_PCM_FORMAT_S16_LE: |
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| 260 | self->info.codec = ROAR_CODEC_PCM_S_LE; |
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| 261 | self->info.bits = 16; |
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| 262 | break; |
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| 263 | case SND_PCM_FORMAT_S16_BE: |
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| 264 | self->info.codec = ROAR_CODEC_PCM_S_BE; |
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| 265 | self->info.bits = 16; |
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| 266 | break; |
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[3739] | 267 | case SND_PCM_FORMAT_U16_LE: |
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| 268 | self->info.codec = ROAR_CODEC_PCM_U_LE; |
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| 269 | self->info.bits = 16; |
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| 270 | break; |
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| 271 | case SND_PCM_FORMAT_U16_BE: |
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| 272 | self->info.codec = ROAR_CODEC_PCM_U_BE; |
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| 273 | self->info.bits = 16; |
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| 274 | break; |
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| 275 | case SND_PCM_FORMAT_S32_LE: |
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| 276 | self->info.codec = ROAR_CODEC_PCM_S_LE; |
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| 277 | self->info.bits = 32; |
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| 278 | break; |
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| 279 | case SND_PCM_FORMAT_S32_BE: |
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| 280 | self->info.codec = ROAR_CODEC_PCM_S_BE; |
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| 281 | self->info.bits = 32; |
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| 282 | break; |
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| 283 | case SND_PCM_FORMAT_U32_LE: |
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| 284 | self->info.codec = ROAR_CODEC_PCM_U_LE; |
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| 285 | self->info.bits = 32; |
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| 286 | break; |
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| 287 | case SND_PCM_FORMAT_U32_BE: |
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| 288 | self->info.codec = ROAR_CODEC_PCM_U_BE; |
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| 289 | self->info.bits = 32; |
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| 290 | break; |
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| 291 | case SND_PCM_FORMAT_S24_3LE: |
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| 292 | self->info.codec = ROAR_CODEC_PCM_S_LE; |
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| 293 | self->info.bits = 24; |
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| 294 | break; |
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| 295 | case SND_PCM_FORMAT_S24_3BE: |
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| 296 | self->info.codec = ROAR_CODEC_PCM_S_BE; |
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| 297 | self->info.bits = 24; |
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| 298 | break; |
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| 299 | case SND_PCM_FORMAT_U24_3LE: |
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| 300 | self->info.codec = ROAR_CODEC_PCM_U_LE; |
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| 301 | self->info.bits = 24; |
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| 302 | break; |
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| 303 | case SND_PCM_FORMAT_U24_3BE: |
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| 304 | self->info.codec = ROAR_CODEC_PCM_U_BE; |
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| 305 | self->info.bits = 24; |
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| 306 | break; |
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[3134] | 307 | default: |
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| 308 | return-EINVAL; |
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| 309 | } |
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| 310 | |
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[3658] | 311 | ROAR_DBG("roar_pcm_hw_params(*) = 0"); |
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[3134] | 312 | return 0; |
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| 313 | } |
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| 314 | |
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| 315 | static int roar_pcm_close (snd_pcm_ioplug_t * io) { |
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| 316 | struct roar_alsa_pcm * self = io->private_data; |
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| 317 | |
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[3135] | 318 | ROAR_DBG("roar_pcm_close(*) = ?"); |
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| 319 | |
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[3134] | 320 | roar_disconnect(&(self->roar.con)); |
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| 321 | |
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[3749] | 322 | roar_mm_free(self); |
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[3134] | 323 | |
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| 324 | return 0; |
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| 325 | } |
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| 326 | |
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| 327 | static snd_pcm_ioplug_callback_t roar_pcm_callback = { |
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[3736] | 328 | .start = roar_pcm_start, |
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| 329 | .stop = roar_pcm_stop, |
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| 330 | .drain = NULL, |
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[3134] | 331 | .pointer = roar_pcm_pointer, |
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| 332 | .transfer = roar_pcm_transfer, |
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| 333 | .delay = roar_pcm_delay, |
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| 334 | .poll_descriptors_count = NULL, |
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| 335 | .poll_descriptors = NULL, |
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| 336 | .poll_revents = NULL, |
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| 337 | .prepare = roar_pcm_prepare, |
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| 338 | .hw_params = roar_pcm_hw_params, |
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[3658] | 339 | .hw_free = NULL, |
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| 340 | .sw_params = NULL, |
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| 341 | .pause = NULL, |
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| 342 | .resume = NULL, |
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| 343 | .dump = NULL, |
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[3134] | 344 | .close = roar_pcm_close, |
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| 345 | }; |
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| 346 | |
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| 347 | SND_PCM_PLUGIN_DEFINE_FUNC(roar) { |
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| 348 | struct roar_alsa_pcm * self; |
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| 349 | snd_config_iterator_t i, next; |
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| 350 | snd_config_t * n; |
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| 351 | const char * para; |
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| 352 | const char * server = NULL; |
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| 353 | int ret; |
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| 354 | |
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[3736] | 355 | (void)root; |
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| 356 | |
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[3135] | 357 | ROAR_DBG("SND_PCM_PLUGIN_DEFINE_FUNC(roar) = ?"); |
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[3134] | 358 | |
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| 359 | snd_config_for_each(i, next, conf) { |
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| 360 | n = snd_config_iterator_entry(i); |
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| 361 | if ( snd_config_get_id(n, ¶) < 0 ) |
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| 362 | continue; |
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| 363 | |
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| 364 | if ( !strcmp(para, "type") || !strcmp(para, "comment") ) |
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| 365 | continue; |
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| 366 | |
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| 367 | if ( !strcmp(para, "server") ) { |
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| 368 | if (snd_config_get_string(n, &server) < 0) { |
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| 369 | return -EINVAL; |
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| 370 | } |
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| 371 | } else { |
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| 372 | return -EINVAL; |
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| 373 | } |
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| 374 | } |
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| 375 | |
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| 376 | errno = ENOSYS; |
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| 377 | |
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[3749] | 378 | if ( (self = roar_mm_malloc(sizeof(struct roar_alsa_pcm))) == NULL ) |
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[3134] | 379 | return -errno; |
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| 380 | |
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| 381 | memset(self, 0, sizeof(struct roar_alsa_pcm)); |
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| 382 | |
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| 383 | errno = ENOSYS; |
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| 384 | if ( roar_simple_connect(&(self->roar.con), (char*)server, "ALSA Plugin") == -1 ) { |
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[3749] | 385 | roar_mm_free(self); |
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[3134] | 386 | return -errno; |
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| 387 | } |
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| 388 | |
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| 389 | self->io.version = SND_PCM_IOPLUG_VERSION; |
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| 390 | self->io.name = "RoarAudio Plugin"; |
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| 391 | self->io.poll_fd = -1; |
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| 392 | self->io.poll_events = 0; |
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| 393 | self->io.mmap_rw = 0; |
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| 394 | self->io.callback = &roar_pcm_callback; |
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| 395 | self->io.private_data = self; |
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| 396 | |
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| 397 | if ( (ret = snd_pcm_ioplug_create(&(self->io), name, stream, mode)) < 0 ) { |
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| 398 | roar_disconnect(&(self->roar.con)); |
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[3749] | 399 | roar_mm_free(self); |
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[3134] | 400 | return ret; |
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| 401 | } |
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| 402 | |
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| 403 | if ( (ret = roar_hw_constraint(self)) < 0 ) { |
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| 404 | snd_pcm_ioplug_delete(&(self->io)); |
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| 405 | roar_disconnect(&(self->roar.con)); |
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[3749] | 406 | roar_mm_free(self); |
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[3134] | 407 | return ret; |
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| 408 | } |
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| 409 | |
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[3658] | 410 | *pcmp = self->io.pcm; |
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| 411 | |
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[3135] | 412 | ROAR_DBG("SND_PCM_PLUGIN_DEFINE_FUNC(roar) = 0"); |
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| 413 | |
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[3134] | 414 | return 0; |
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| 415 | } |
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| 416 | |
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| 417 | SND_PCM_PLUGIN_SYMBOL(roar); |
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| 418 | |
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[3135] | 419 | int __snd_pcm_roar_open_dlsym_pcm_001 (void) { |
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[3658] | 420 | ROAR_DBG("__snd_pcm_roar_open_dlsym_pcm_001(void) = 0"); |
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[3135] | 421 | return 0; |
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| 422 | } |
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| 423 | |
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[3134] | 424 | //ll |
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