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 it
7 * 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_objec_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 int TimeGet (audio_output, mtime_t *);
47 static void Play (audio_output_t *, block_t *);
48 static void Flush (audio_output_t *, bool);
49 static int VolumeSet (audio_output_t *, float);
50 static int MuteSet (audio_output_t *, bool);
51 static void VolumeChanged (void *, unsigned);
52 static void PositionChanged (void *, int);
57 unsigned long long read_offset;
58 unsigned long long write_offset;
64 /** Initializes an sndio playback stream */
65 static int Start (audio_output_t *aout, audio_sample_format_t *restrict fmt)
67 aout_sys_t *sys = aout->sys;
69 sys->hdl = sio_open (NULL, SIO_PLAY, 0 /* blocking */);
72 msg_Err (obj, "cannot create audio playback stream");
81 par.bps = par.bits >> 3;
83 par.le = SIO_LE_NATIVE;
84 par.pchan = aout_FormatNbChannels (fmt);
85 par.rate = fmt->i_rate;
88 if (!sio_setpar (sys->hdl, &par) || !sio_getpar (sys->hdl, &par))
90 msg_Err (obj, "cannot negotiate audio playback parameters");
94 if (par.bps != par.bits >> 3)
96 msg_Err (obj, "unsupported audio sample format (%u bits in %u bytes)",
104 fmt->i_format = par.sig ? VLC_CODEC_S8 : VLC_CODEC_U8;
107 fmt->i_format = par.sig
108 ? (par.le ? VLC_CODEC_S16L : VLC_CODEC_S16B)
109 : (par.le ? VLC_CODEC_U16L : VLC_CODEC_U16B);
112 fmt->i_format = par.sig
113 ? (par.le ? VLC_CODEC_S24L : VLC_CODEC_S24B)
114 : (par.le ? VLC_CODEC_U24L : VLC_CODEC_U24B);
117 fmt->i_format = par.sig
118 ? (par.le ? VLC_CODEC_S32L : VLC_CODEC_S32B)
119 : (par.le ? VLC_CODEC_U32L : VLC_CODEC_U32B);
122 msg_Err (obj, "unsupported audio sample format (%u bits)",
127 fmt->i_rate = par.rate;
128 sys->rate = par.rate;
135 chans = AOUT_CHAN_CENTER;
138 chans = AOUT_CHANS_STEREO;
141 chans = AOUT_CHANS_4_0;
144 chans = AOUT_CHANS_5_1;
147 chans = AOUT_CHANS_7_1;
150 msg_Err (aout, "unknown %u channels map", par.pchan);
154 fmt->i_original_channels = fmt->i_physical_channels = chans;
155 aout_FormatPrepare (fmt);
158 aout->time_get = TimeGet;
162 if (sio_onvol(sys->hdl, VolumeChanged, aout))
164 aout->volume_set = VolumeSet;
165 aout->mute_set = MuteSet;
169 aout->volume_set = NULL;
170 aout->mute_set = NULL;
173 sys->read_offset = 0;
174 sys->write_offset = 0;
175 sio_onmove (sys->hdl, PositionChanged, aout);
176 sio_start (sys->hdl);
180 sio_close (sys->hdl);
184 static void Close (vlc_object_t *obj)
186 audio_output_t *aout = (audio_output_t *)obj;
187 aout_sys_t *sys = aout->sys;
189 sio_close (sys->hdl);
192 static void PositionChanged (void *arg, int delta)
194 audio_output_t *aout = arg;
195 aout_sys_t *sys = aout->sys;
197 sys->read_offset += delta;
200 static int TimeGet (audio_output_t *aout, mtime_t *restrict delay)
202 aout_sys_t *sys = aout->sys;
203 long long frames = sys->write_offset - sys->read_offset;
208 *delay = frames * CLOCK_FREQ / sys->rate;
212 static void Play (audio_output_t *aout, block_t *block)
214 aout_sys_t *sys = aout->sys;
216 sys->write_offset += block->i_nb_samples;
218 while (block->i_buffer > 0 && !sio_eof (sys->hdl))
220 size_t bytes = sio_write (sys->hdl, block->p_buffer, block->i_buffer);
222 block->p_buffer += bytes;
223 block->i_buffer -= bytes;
224 /* Note that i_nb_samples and i_pts are not updated here. */
226 block_Release (block);
229 static void Flush (audio_output_t *aout, bool wait)
233 long long frames = sys->write_offset - sys->read_offset;
236 msleep (frames * CLOCK_FREQ / sys->rate);
241 sys->read_offset = 0;
242 sys->write_offset = 0;
243 sio_start (sys->hdl);
247 static void VolumeChanged (void *arg, unsigned volume)
249 audio_output_t *aout = arg;
250 float fvol = (float)volume / (float)SIO_MAXVOL;
252 aout_VolumeReport (aout, fvol);
253 aout_MuteReport (aout, volume == 0);
254 if (volume) /* remember last non-zero volume to unmute later */
255 aout->sys->volume = volume;
258 static int VolumeSet (audio_output_t *aout, float fvol)
260 aout_sys_t *sys = aout->sys;
261 unsigned volume = lroundf (fvol * SIO_MAXVOL);
263 if (!sys->mute && !sio_setvol (sys->hdl, volume))
265 sys->volume = volume;
269 static int MuteSet (audio_output_t *aout, bool mute)
271 aout_sys_t *sys = aout->sys;
273 if (!sio_setvol (sys->hdl, mute ? 0 : sys->volume))
280 static int Open (vlc_object_t *obj)
282 audio_output_t *aout = (audio_output_t *)obj;
283 aout_sys_t *sys = malloc (sizeof (*sys));
284 if (unlikely(sys == NULL))
290 /* FIXME: set volume/mute here */
294 static int Close (vlc_object_t *obj)
296 audio_output_t *aout = (audio_output_t *)obj;
297 aout_sys_t *sys = aout->sys;