1 /*****************************************************************************
2 * sndio.c : sndio plugin for VLC
3 *****************************************************************************
4 * Copyright (C) 2012 RĂ©mi Denis-Courmont
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU Lesser General Public License as published by
8 * the Free Software Foundation; either version 2.1 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19 *****************************************************************************/
28 #include <vlc_common.h>
29 #include <vlc_plugin.h>
34 static int Open (vlc_object_t *);
35 static void Close (vlc_object_t *);
38 set_shortname ("sndio")
39 set_description (N_("OpenBSD sndio audio output"))
40 set_category (CAT_AUDIO)
41 set_subcategory (SUBCAT_AUDIO_AOUT)
42 set_capability ("audio output", 120)
43 set_callbacks (Open, Close )
46 static void Play (audio_output_t *, block_t *, mtime_t *);
47 static void Pause (audio_output_t *, bool, mtime_t);
48 static int VolumeSet (audio_output_t *, float);
49 static int MuteSet (audio_output_t *, bool);
50 static void VolumeChanged (void *, unsigned);
59 /** Initializes an sndio playback stream */
60 static int Open (vlc_object_t *obj)
62 audio_output_t *aout = (audio_output_t *)obj;
63 aout_sys_t *sys = malloc (sizeof (*sys));
64 if (unlikely(sys == NULL))
67 sys->hdl = sio_open (NULL, SIO_PLAY, 0 /* blocking */);
70 msg_Err (obj, "cannot create audio playback stream");
79 par.bps = par.bits >> 3;
81 par.le = SIO_LE_NATIVE;
82 par.pchan = aout_FormatNbChannels (&aout->format);
83 par.rate = aout->format.i_rate;
86 if (!sio_setpar (sys->hdl, &par) || !sio_getpar (sys->hdl, &par))
88 msg_Err (obj, "cannot negotiate audio playback parameters");
92 if (par.bps != par.bits >> 3)
94 msg_Err (obj, "unsupported audio sample format (%u bits in %u bytes)",
104 f.i_format = par.sig ? VLC_CODEC_S8 : VLC_CODEC_U8;
107 f.i_format = par.sig ? (par.le ? VLC_CODEC_S16L : VLC_CODEC_S16B)
108 : (par.le ? VLC_CODEC_U16L : VLC_CODEC_U16B);
111 f.i_format = par.sig ? (par.le ? VLC_CODEC_S24L : VLC_CODEC_S24B)
112 : (par.le ? VLC_CODEC_U24L : VLC_CODEC_U24B);
115 f.i_format = par.sig ? (par.le ? VLC_CODEC_S32L : VLC_CODEC_S32B)
116 : (par.le ? VLC_CODEC_U32L : VLC_CODEC_U32B);
119 msg_Err (obj, "unsupported audio sample format (%u bits)",
131 chans = AOUT_CHAN_CENTER;
134 chans = AOUT_CHANS_STEREO;
137 chans = AOUT_CHANS_4_0;
140 chans = AOUT_CHANS_5_1;
143 chans = AOUT_CHANS_7_1;
146 msg_Err (aout, "unknown %u channels map", par.pchan);
150 f.i_original_channels = f.i_physical_channels = chans;
151 aout_FormatPrepare (&f);
155 aout->pf_play = Play;
156 aout->pf_pause = Pause;
157 aout->pf_flush = NULL; /* sndio sucks! */
158 if (sio_onvol(sys->hdl, VolumeChanged, aout))
160 aout->volume_set = VolumeSet;
161 aout->mute_set = MuteSet;
165 aout->volume_set = NULL;
166 aout->mute_set = NULL;
169 sio_start (sys->hdl);
177 static void Close (vlc_object_t *obj)
179 audio_output_t *aout = (audio_output_t *)obj;
180 aout_sys_t *sys = aout->sys;
182 sio_close (sys->hdl);
186 static void Play (audio_output_t *aout, block_t *block,
187 mtime_t *restrict drift)
189 aout_sys_t *sys = aout->sys;
192 if (sio_getpar (sys->hdl, &par) == 0)
194 mtime_t delay = par.bufsz * CLOCK_FREQ / aout->format.i_rate;
196 *drift = mdate () + delay - block->i_pts;
199 while (block->i_buffer > 0 && !sio_eof (sys->hdl))
201 size_t bytes = sio_write (sys->hdl, block->p_buffer, block->i_buffer);
203 block->p_buffer += bytes;
204 block->i_buffer -= bytes;
205 /* Note that i_nb_samples and i_pts are corrupted here. */
207 block_Release (block);
210 static void Pause (audio_output_t *aout, bool pause, mtime_t date)
212 aout_sys_t *sys = aout->sys;
217 sio_start (sys->hdl);
221 static void VolumeChanged (void *arg, unsigned volume)
223 audio_output_t *aout = arg;
224 float fvol = (float)volume / (float)SIO_MAXVOL;
226 aout_VolumeReport (aout, fvol);
227 aout_MuteReport (aout, volume == 0);
228 if (volume) /* remember last non-zero volume to unmute later */
229 aout->sys->volume = volume;
232 static int VolumeSet (audio_output_t *aout, float fvol)
234 aout_sys_t *sys = aout->sys;
235 unsigned volume = lroundf (fvol * SIO_MAXVOL);
237 if (!sys->mute && !sio_setvol (sys->hdl, volume))
239 sys->volume = volume;
243 static int MuteSet (audio_output_t *aout, bool mute)
245 aout_sys_t *sys = aout->sys;
247 if (!sio_setvol (sys->hdl, mute ? 0 : sys->volume))